/* Simplified CSS System - Base Styles */

/* Inter font loaded via <link> in HTML for non-blocking rendering */

:root {
    /* Colors (App Visual Identity) */
    --bg: #ffffff;
    --card: #ffffff;
    --text: #000000;
    --text-secondary: #6b6b6b;
    --text-muted: #5f6368;
    --primary: #000000;
    --primary-dark: #333333;
    --nav-active: #9B51E0;
    --border: #E5E5EA;
    --border-light: #F2F2F7;
    --shadow: 0px 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-light: 0px 10px 30px rgba(0, 0, 0, 0.05);
    
    /* Difficulty colors */
    --difficulty-easy: #0B7285;
    --difficulty-medium: #7C3AED;
    --difficulty-hard: #DC2626;
    --difficulty-expert: #8B6A45;
    --difficulty-master: #262626;
    
    /* Typography */
    --font-title: 3.5rem;
    --font-intro: 1.125rem;
    --font-h1: 2.5rem;
    --font-h2: 2rem;
    --font-h3: 1.25rem;
    --font-body: 1.0625rem;
    --font-caption: 0.875rem;
    
    /* Spacing (8px grid) */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius (Squircles) */
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-full: 100px;
    
    /* Transitions */
    --transition: all 0.2s ease;
    --transition-slow: all 0.3s ease;
    
    /* v1.1 Design System Tokens */
    --focus-ring: 0 0 0 3px rgba(155, 81, 224, 0.4);
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 300ms cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    :root {
        --transition-fast: 0ms linear;
        --transition-spring: 0ms linear;
    }
}

/* Base Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', system-ui, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    margin: 0;
    padding: 0;
    transition: var(--transition);
}


/* Typography System */
.title {
    font-size: var(--font-title);
    font-weight: 700;
    line-height: 1.2;
    margin: 0 0 var(--space-lg) 0;
    color: var(--text);
}

.intro {
    font-size: var(--font-intro);
    font-weight: 400;
    line-height: 1.5;
    margin: 0 0 var(--space-lg) 0;
    color: var(--text-secondary);
}

.header-1 {
    font-size: var(--font-h1);
    font-weight: 600;
    line-height: 1.3;
    margin: 0 0 var(--space-md) 0;
    color: var(--text);
}

.header-2 {
    font-size: var(--font-h2);
    font-weight: 600;
    line-height: 1.3;
    margin: 0 0 var(--space-md) 0;
    color: var(--text);
}

.header-3 {
    font-size: var(--font-h3);
    font-weight: 600;
    line-height: 1.4;
    margin: 0 0 var(--space-sm) 0;
    color: var(--text);
}

.body {
    font-size: var(--font-body);
    font-weight: 400;
    line-height: 1.6;
    margin: 0 0 var(--space-md) 0;
    color: var(--text);
}

.caption {
    font-size: var(--font-caption);
    font-weight: 400;
    line-height: 1.4;
    margin: 0 0 var(--space-sm) 0;
    color: var(--text-muted);
}

/* Link */
.link {
    color: var(--primary);
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.link:hover {
    opacity: 0.7;
}

/* Button */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    background: var(--primary);
    color: var(--bg);
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--font-body);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    min-height: 48px;
    box-shadow: var(--shadow);
}

.button:hover {
    opacity: 0.85;
    transform: scale(0.98);
}

.button:active {
    transform: scale(0.95);
}

.button:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.button--secondary {
    background: var(--border-light);
    color: var(--text);
    border: 1px solid var(--border);
    box-shadow: none;
}

.button--secondary:hover {
    background: var(--border);
    opacity: 1;
}

/* Hero Pills - Extracted from inline styles */
.hero-pills {
    margin-top: 1.5rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.hero-pill {
    background: var(--border-light);
    padding: 6px 12px;
    border-radius: 100px;
    text-decoration: none;
    color: #444444;
    transition: var(--transition-fast);
}

.hero-pill:hover {
    background: var(--border);
}

.hero-pill:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.button--large {
    padding: var(--space-md) var(--space-xl);
    font-size: 1.125rem;
    min-height: 56px;
}

.card {
    background: var(--card);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border);
    margin-bottom: var(--space-xl);
}

.card:hover {
    box-shadow: 0px 15px 40px rgba(0, 0, 0, 0.08);
}

.nav {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: var(--space-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo:hover .logo-img {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.nav-bubble {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    min-height: 44px;
    border: 1px solid transparent;
}

.nav-bubble:hover {
    background: var(--border-light);
    color: var(--text);
    border-color: var(--border);
}

.nav-bubble.active {
    background: var(--border-light);
    color: var(--text);
    border-color: var(--border);
}

.nav-icon {
    width: 20px;
    height: 20px;
    opacity: 0.8;
}

.nav-icon--dark {
    filter: brightness(0) saturate(100%);
}

.nav-bubble.active .nav-icon {
    opacity: 1;
}

/* Header Download Button */
.button--header-download {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-body);
    white-space: nowrap;
    margin-left: var(--space-md);
    flex-shrink: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    /*
     * Mobile header layout:
     * - Logo pinned left
     * - Hamburger pinned right
     * - Download CTA truly centered (viewport center), unaffected by unequal side widths
     */
    .nav-container {
        display: grid;
        grid-template-columns: 1fr auto 1fr;
        align-items: center;
        gap: var(--space-xs);
    }

    .logo {
        grid-column: 1;
        justify-self: start;
    }

    .button--header-download {
        grid-column: 2;
        justify-self: center;
        display: inline-flex;
        padding: var(--space-xs) var(--space-sm);
        font-size: 0.875rem;
        margin-left: 0; /* override desktop spacing so centering is exact */
        flex-shrink: 1;
        max-width: 52vw;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .hamburger-menu {
        grid-column: 3;
        justify-self: end;
    }

    /*
      Keep the download CTA truly centered on mobile, even though the logo and
      hamburger have different widths. Reserve equal space on both sides by
      forcing logo and hamburger to the same width.
    */
    .nav-container > .logo,
    .nav-container > .hamburger-menu {
        width: 44px;
        flex: 0 0 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .nav-container > .logo .logo-img {
        width: 28px;
        height: 28px;
    }
}

/*
 * Logo sizing regression guard:
 * The navigation component renders the logo in both the header and the mobile menu.
 * Without a base `.logo-img` size, the image can render at its intrinsic size on some
 * mobile browsers when the menu opens.
 */
.logo-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
    display: block;
    flex: 0 0 auto;
    transition: var(--transition);
    will-change: transform;
}

/* Mobile Navigation */
.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 100vh;
    background: var(--card);
    z-index: 1200;
    padding: var(--space-xl);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-nav.active {
    display: flex;
    flex-direction: column;
    opacity: 1;
    visibility: visible;
}

.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border);
}

.mobile-nav-download {
    width: 100%;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border);
}

.mobile-nav-download .button {
    width: 100%;
    justify-content: center;
}

.mobile-nav-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text);
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    min-width: 44px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.mobile-nav-close:hover {
    background: var(--border-light);
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    width: 100%;
}

.mobile-nav-bubble {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    font-size: 1.125rem;
    min-height: 60px;
    border: 1px solid transparent;
}

.mobile-nav-bubble:hover {
    background: var(--border-light);
    color: var(--text);
    border-color: var(--border);
}

.mobile-nav-bubble.active {
    background: var(--border-light);
    color: var(--text);
    border-color: var(--border);
}


.mobile-nav-icon {
    width: 24px;
    height: 24px;
    opacity: 0.8;
}

.mobile-nav-icon--dark {
    filter: brightness(0) saturate(100%);
}

.mobile-nav-bubble.active .mobile-nav-icon {
    opacity: 1;
}

/* Hamburger Menu */
.hamburger-menu {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
}

.hamburger-menu:hover {
    background: var(--border-light);
}

.hamburger-icon {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 24px;
    height: 18px;
}

.hamburger-icon span {
    width: 100%;
    height: 2px;
    background: var(--text);
    border-radius: 1px;
    transition: var(--transition);
}

/* Breadcrumb Navigation */
.breadcrumb-nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-md) var(--space-lg) var(--space-md);
    background: transparent;
}

.breadcrumb-nav ol {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.breadcrumb-nav li {
    display: flex;
    align-items: center;
}

.breadcrumb-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    font-weight: 500;
    position: relative;
}

.breadcrumb-nav a:hover {
    color: var(--primary);
    background: var(--border-light);
    transform: translateY(-1px);
}

.breadcrumb-nav li:not(:last-child)::after {
    content: "";
    margin: 0;
}

.breadcrumb-nav li:last-child {
    color: var(--text);
    font-weight: 600;
    padding: var(--space-xs) var(--space-sm);
    background: var(--border-light);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

/* Breadcrumb responsive design */
@media (max-width: 768px) {
    .breadcrumb-nav {
        padding: var(--space-sm) var(--space-sm) var(--space-md) var(--space-sm);
    }
    
    .breadcrumb-nav ol {
        font-size: 0.875rem;
        gap: 2px;
    }
    
    .breadcrumb-nav a,
    .breadcrumb-nav li:last-child {
        padding: 4px 8px;
    }
    
    .breadcrumb-nav li:not(:last-child)::after {
        margin: 0;
    }
}

/* Hero Section */
.hero {
    padding: var(--space-2xl) 0;
    background: linear-gradient(135deg, var(--bg) 0%, var(--border-light) 100%);
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.hero-text h1 {
    font-size: var(--font-title);
    font-weight: 800;
    line-height: 1.1;
    margin: 0 0 var(--space-md) 0;
    color: var(--text);
}

.hero-text p {
    font-size: var(--font-intro);
    color: var(--text-secondary);
    margin: 0 0 var(--space-xl) 0;
    line-height: 1.5;
}

.hero-intro {
    font-size: 1rem;
    line-height: 1.45;
    max-width: 42ch;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    align-items: center;
}

.hero-quick-links {
    margin: var(--space-sm) 0 0 0;
    font-size: var(--font-caption);
    color: var(--text-secondary);
    line-height: 1.55;
}

.hero-secondary-links {
    margin: 0.2rem 0 0 0;
    font-size: var(--font-caption);
    color: var(--text-secondary);
    line-height: 1.55;
}

.section-block {
    padding: var(--space-2xl) 0;
}

.section-block--soft {
    background: var(--border-light);
}

.section-block--cta {
    background: linear-gradient(180deg, var(--bg) 0%, var(--border-light) 100%);
}

.section-shell {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section-lead {
    max-width: 62ch;
    margin: 0 auto var(--space-xl) auto;
}

.value-grid,
.quote-grid,
.feature-grid,
.mini-faq-grid {
    display: grid;
    gap: var(--space-lg);
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.value-card,
.quote-card,
.feature-card,
.mini-faq-grid article,
.cta-panel {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-light);
}

.value-card,
.feature-card,
.mini-faq-grid article {
    padding: var(--space-xl);
}

.value-card h3,
.feature-card h3,
.mini-faq-grid h3 {
    margin: 0 0 var(--space-sm) 0;
    font-size: var(--font-h3);
}

.value-card p,
.feature-card p,
.mini-faq-grid p {
    margin: 0;
    color: var(--text-secondary);
}

.feature-card a {
    display: inline-block;
    margin-top: var(--space-md);
    color: var(--nav-active);
    font-weight: 600;
    text-decoration: none;
}

.feature-card a:hover {
    text-decoration: underline;
}

.quote-card {
    margin: 0;
    padding: var(--space-xl);
    font-size: 1.05rem;
    line-height: 1.5;
}

.quote-card cite {
    display: block;
    margin-top: var(--space-sm);
    color: var(--text-secondary);
    font-size: var(--font-caption);
    font-style: normal;
}

.mini-faq {
    max-width: 1200px;
}

.cta-panel {
    text-align: center;
    padding: var(--space-2xl);
}

.cta-panel .body {
    max-width: 56ch;
    margin-left: auto;
    margin-right: auto;
}

.seo-rich-content {
    margin-top: var(--space-2xl);
}

@media (max-width: 960px) {
    .value-grid,
    .quote-grid,
    .feature-grid,
    .mini-faq-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .value-grid,
    .quote-grid,
    .feature-grid,
    .mini-faq-grid {
        grid-template-columns: 1fr;
    }

    .cta-panel {
        padding: var(--space-xl);
    }
}

/* Visually hidden but accessible to screen readers */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.button__label {
    display: inline-block;
}

.phone-container {
    position: relative;
    width: 300px;
    height: 592px;
    margin: 0 auto;
}

.phone-frame {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.phone-screen {
    position: absolute;
    top: 26px;
    left: 26px;
    width: 248px;
    height: 540px;
    border-radius: 17px;
    overflow: hidden;
    background: #ECEAEC;
}

.phone-screen iframe {
    width: 100%;
    height: 100%;
    border: none;
    opacity: 0;
    transition: opacity 240ms ease;
}

.phone-screen.vimeo-loaded iframe {
    opacity: 1;
}

.vimeo-facade {
    position: absolute;
    inset: 0;
    z-index: 1;
    border: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 20%, #30354a 0%, #121722 70%);
    color: #fff;
    cursor: pointer;
}

.vimeo-facade__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.2);
    font-size: 1.35rem;
    line-height: 1;
}

.vimeo-facade__text {
    font-size: 0.82rem;
    font-weight: 600;
    text-align: center;
    letter-spacing: 0.01em;
    max-width: 85%;
}

/* Game Components */
.game-container {
    background: transparent;
    padding: var(--space-xl);
    border-radius: var(--radius);
    margin-bottom: var(--space-xl);
}

.game-frame {
    width: 100%;
    height: 600px;
    margin: var(--space-md) 0;
    background: var(--card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.game-frame iframe {
    width: 100%;
    height: 100%;
    border-radius: var(--radius);
}

/* Footer - Reusable Component */
.footer {
    background: var(--card);
    border-top: 1px solid var(--border);
    padding: var(--space-xl) 0 var(--space-lg) 0;
    margin-top: var(--space-2xl);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.footer-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
    list-style: none;
    padding: 0;
}

.footer-action-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: #555555;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.footer-action-link:hover {
    color: var(--text);
}

.footer-action-link--muted {
    color: var(--text-muted);
}

.footer-icon {
    width: 16px;
    height: 16px;
    opacity: 0.7;
}

.footer-icon--dark {
    filter: brightness(0) saturate(100%);
}

.footer-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-light);
    color: var(--text-muted);
    font-size: var(--font-caption);
}

.language-switcher {
    display: flex;
    align-items: center;
}

/* ── Footer social icons ───────────────────────────────────────────────── */
.footer-social {
    display: flex;
    flex-direction: row;
    gap: 16px;
    justify-content: center;
    align-items: center;
    margin: 12px 0 8px;
}

.footer-social a {
    display: flex;
    align-items: center;
    opacity: 0.5;
    transition: opacity 0.2s;
    color: inherit;
}

.footer-social a:hover {
    opacity: 1;
}

.footer-social svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
    display: block;
}

/* ── Language pill trigger ─────────────────────────────────────────────── */
.lang-pill-hint {
    margin: 0 0 8px;
    font-size: 12px;
    color: var(--text-secondary);
    text-align: left;
    line-height: 1.4;
}

.lang-pill {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--border-light);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 4px 12px;
    font-size: var(--font-caption);
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    line-height: 1.5;
}

.lang-pill:hover {
    background: var(--border);
    color: var(--text);
}

/* ── Bottom sheet backdrop ─────────────────────────────────────────────── */
.lang-sheet-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.lang-sheet-backdrop--open {
    opacity: 1;
    pointer-events: auto;
}

/* ── Bottom sheet panel ────────────────────────────────────────────────── */
.lang-sheet {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--card);
    border-radius: 20px 20px 0 0;
    box-shadow: 0 -4px 32px rgba(0, 0, 0, 0.15);
    z-index: 1001;
    padding: 0 0 env(safe-area-inset-bottom, 16px);
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    max-height: 80vh;
    overflow-y: auto;
}

.lang-sheet--open {
    transform: translateY(0);
}

/* Body scroll lock when sheet is open */
.lang-sheet-body-lock {
    overflow: hidden;
}

.lang-sheet__header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: 20px 20px 12px;
    border-bottom: 1px solid var(--border-light);
}

.lang-sheet__subtitle {
    width: 100%;
    margin: 8px 0 0;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.lang-sheet__title {
    font-weight: 600;
    font-size: var(--font-body);
    color: var(--text);
}

.lang-sheet__close {
    background: var(--border-light);
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
    line-height: 1;
}

.lang-sheet__close:hover {
    background: var(--border);
    color: var(--text);
}

/* ── Language grid inside sheet ─────────────────────────────────────────── */
.lang-sheet__grid {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 8px 16px 20px;
}

.lang-sheet__item {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-secondary);
    font-size: var(--font-body);
    font-weight: 500;
    transition: var(--transition);
    border: 2px solid transparent;
}

.lang-sheet__item:hover {
    background: var(--border-light);
    color: var(--text);
}

.lang-sheet__item--active {
    color: var(--primary);
    border-color: var(--primary);
    background: color-mix(in srgb, var(--primary) 8%, transparent);
}

.lang-sheet__flag {
    font-size: 24px;
    line-height: 1;
}

.lang-sheet__label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

/* Legacy language-link styles (kept for any pages that might still use them) */
.language-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: var(--font-caption);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.language-link:hover {
    color: var(--text);
    background: var(--border-light);
}

.language-link.active {
    color: var(--primary);
    background: var(--border-light);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .hamburger-menu {
        display: inline-flex;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
        text-align: center;
    }
    
    .hero-text {
        min-width: 0;          /* prevent grid 1fr from expanding beyond viewport */
    }

    .hero-text p {
        max-width: 42ch;
        margin-left: auto;
        margin-right: auto;
        overflow-wrap: break-word;
        word-break: break-word;
    }

    .hero-text h1 {
        font-size: 2rem;
    }
    
    .hero-actions {
        justify-content: center;
        min-width: 0;
    }

    .hero-actions > .button {
        flex: 1 0 100%;
        min-width: 0;
    }

    .hero-actions > .button--secondary {
        flex: 1 0 100%;
        min-width: 0;
    }

    .hero-actions > .button--secondary.button--large {
        padding: var(--space-sm) var(--space-lg);
        font-size: var(--font-body);
        min-height: 48px;
    }

    .hero-actions .button__label--short {
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    .phone-container {
        width: 250px;
        height: 493px;
    }
    
    .phone-screen {
        top: 22px;
        left: 22px;
        width: 206px;
        height: 449px;
    }
    
    .game-frame {
        height: 400px;
    }
    
    .game-container {
        padding: var(--space-md);
    }
    
    .footer-actions {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .footer-meta {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
}

/* Reviews Section */
.reviews-section {
    padding: var(--space-2xl) 0;
    background: var(--bg);
}

.reviews-header {
    text-align: center;
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 var(--space-lg);
}

.header-rating {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.header-stars {
    display: flex;
    gap: 2px;
}

.header-star-icon {
    font-size: 1.5rem;
    line-height: 1;
}

.header-star-icon.star-filled {
    color: #FE9500;
}

.header-star-icon.star-empty {
    color: #ddd;
}

.header-rating-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.reviews-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.reviews-subtitle {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: var(--space-md);
    line-height: 1.4;
}

.reviews-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 0;
}

.reviews-grid {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg) 0;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
}

.white-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.reviews-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.review-block {
    flex: 0 0 350px;
    min-width: 350px;
    max-width: 350px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: 0 2px 8px var(--shadow-light);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    scroll-snap-align: start;
}

.review-block:hover {
    box-shadow: 0 4px 16px var(--shadow);
    transform: translateY(-2px);
}

.review-header {
    margin-bottom: var(--space-md);
}

.review-title {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text);
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.review-date {
    color: var(--text-secondary);
    font-size: 0.9rem;
    white-space: nowrap;
    flex-shrink: 0;
}

.review-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding-bottom: var(--space-sm);
    gap: var(--space-md);
}

.review-stars {
    display: flex;
    gap: 3px;
    flex-shrink: 0;
    font-size: 1.2em;
}

.review-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    align-items: flex-end;
}

.star-icon {
    width: 20px;
    height: 20px;
    display: block;
}

.star-filled {
    filter: brightness(0) saturate(100%) invert(58%) sepia(99%) saturate(1352%) hue-rotate(1deg) brightness(101%) contrast(101%) !important;
}

.star-empty {
    color: var(--text-secondary);
    opacity: 0.3;
}


.review-username {
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    white-space: nowrap;
    flex-shrink: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
}

.review-flag {
    margin-right: var(--space-sm);
    font-size: 1.1em;
    line-height: 1;
    flex-shrink: 0;
}

.review-text {
    color: var(--text);
    line-height: 1.5;
    overflow-wrap: break-word;
    width: 100%;
    flex: 1;
}

.review-content {
    position: relative;
}

.review-translation-text {
    color: var(--text-primary);
    font-style: normal;
    margin-bottom: var(--space-sm);
    font-size: 0.95em;
    line-height: 1.5;
    overflow-wrap: break-word;
    width: 100%;
}

.review-original-text {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: var(--space-sm);
    font-size: 0.95em;
    line-height: 1.5;
    overflow-wrap: break-word;
    width: 100%;
    padding-left: var(--space-sm);
    border-left: 2px solid var(--primary);
}

.review-toggle-btn {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.8em;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-bottom: var(--space-xs);
    font-weight: 500;
}

.review-toggle-btn:hover {
    background: var(--primary);
    color: var(--background);
    transform: translateY(-1px);
}

.review-toggle-btn:active {
    transform: translateY(0);
}

.review-toggle-btn[aria-pressed="true"] {
    background: var(--primary);
    color: var(--background);
}

/* Title toggle styles */
.review-title-container {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.review-translated-title,
.review-original-title {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text);
    margin: 0;
    line-height: 1.3;
}

.review-original-title {
    color: var(--text-secondary);
    font-style: italic;
}


.review-show-more-btn {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.8em;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-bottom: var(--space-xs);
    font-weight: 500;
}

.review-show-more-btn:hover {
    background: var(--primary);
    color: var(--background);
    transform: translateY(-1px);
}

.review-show-more-btn:active {
    transform: translateY(0);
}

.review-show-more-btn[aria-pressed="true"] {
    background: var(--primary);
    color: var(--background);
}


.review-translation {
    color: var(--text-secondary);
    font-style: italic;
    margin-top: var(--space-sm);
    font-size: 0.95em;
    line-height: 1.5;
    overflow-wrap: break-word;
    width: 100%;
    padding-left: var(--space-sm);
    border-left: 2px solid var(--primary);
}

/* Hide scrollbar but keep functionality */
.reviews-container::-webkit-scrollbar {
    display: none;
}

.reviews-container {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

/* Responsive adjustments for reviews */
@media (max-width: 768px) {
    .reviews-header {
        margin-bottom: 2rem;
        padding: 0 var(--space-md);
    }
    
    .header-rating {
        margin-bottom: var(--space-sm);
    }
    
    .header-star-icon {
        font-size: 1.25rem;
    }
    
    .header-rating-text {
        font-size: 1.1rem;
    }
    
    .reviews-title {
        font-size: 2rem;
    }
    
    .reviews-subtitle {
        font-size: 1.1rem;
    }
    
    .reviews-description {
        font-size: 1rem;
    }
    
    .reviews-grid {
        gap: var(--space-md);
        padding: var(--space-md) 0;
    }
    
    .review-block {
        flex: 0 0 280px;
        min-width: 280px;
        max-width: 280px;
        padding: var(--space-md);
    }
    
    .review-title {
        font-size: 1rem;
    }
    
    .review-date,
    .review-username {
        font-size: 0.8rem;
    }
    
    .review-text {
        font-size: 0.9rem;
    }
    
    .review-translation,
    .review-translation-text,
    .review-original-text {
        font-size: 0.85rem;
    }
    
    .review-original-text {
        padding-left: var(--space-sm);
    }
    
    .review-toggle-btn,
    .review-show-more-btn {
        font-size: 0.75rem;
        padding: var(--space-xs);
    }
    
    .review-translated-title,
    .review-original-title {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .review-block {
        flex: 0 0 250px;
        min-width: 250px;
        max-width: 250px;
    }
    
    .review-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }

    /* Ensure the meta block spans the full card width on small screens */
    .review-info {
        width: 100%;
        align-items: flex-start;
    }

    .review-date {
        width: 100%;
        text-align: left;
    }

    .review-username {
        width: 100%;
        justify-content: flex-start;
    }
    
    .review-stars {
        min-width: 100px;
        font-size: 1.1em;
    }
    
    .star-icon {
        width: 18px;
        height: 18px;
    }
}

/* Page-specific styles - Simplified */

/* FAQ Container */
.faq-container {
    background-color: var(--card);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: 0 2px 5px var(--shadow-light);
    max-width: 1200px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.faq-item:last-child {
    border-bottom: none;
}

/* FAQ responsive design */
@media (max-width: 768px) {
    .faq-container {
        padding: 1rem;
    }
}


/* Remove most page-specific styles to keep it minimal */
/* Only keep essential page layouts if needed */

/* Responsive Design - Simplified */

/* Mobile First Approach */
@media (max-width: 576px) {
    .container {
        padding: 0 var(--space-sm);
    }
    
    .card {
        padding: var(--space-md);
    }
}

/* Tablet */
@media (max-width: 768px) {
    .game-frame {
        height: 400px;
    }
}

/* Desktop */
@media (min-width: 992px) {
    .container {
        max-width: 1200px;
    }
}

/* Printable difficulty buttons */
.print-difficulty-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    color: #fff;
    width: 100%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.print-difficulty-buttons {
    display: grid;
    gap: 0.75rem;
}

@media (min-width: 480px) {
    .print-difficulty-buttons {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.print-difficulty-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.16);
}

.print-difficulty-button:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 3px;
}

.print-difficulty-button--easy {
    background-color: var(--difficulty-easy);
}

.print-difficulty-button--medium {
    background-color: var(--difficulty-medium);
}

.print-difficulty-button--hard {
    background-color: var(--difficulty-hard);
}

.print-difficulty-button--expert {
    background-color: var(--difficulty-expert);
}

.print-difficulty-button--master {
    background-color: #262626;
}

.print-difficulty-button__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    flex-shrink: 0;
}

.print-difficulty-button__icon img {
    width: 1.5rem;
    height: 1.5rem;
    display: block;
}

/* Sudoku Strategies overview page */
.strategies-page {
    padding: var(--space-2xl) var(--space-md);
}

@media (min-width: 768px) {
    .strategies-page {
        padding-top: calc(var(--space-2xl) + var(--space-md));
        padding-bottom: calc(var(--space-2xl) + var(--space-md));
    }
}

.feature-strategy {
    display: grid;
    gap: var(--space-xl);
    max-width: 1100px;
    margin: 0 auto var(--space-2xl);
    padding: var(--space-2xl) var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    background: linear-gradient(135deg, rgba(47, 175, 200, 0.18), rgba(175, 81, 221, 0.12));
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.06);
}

@media (min-width: 1024px) {
    .feature-strategy {
        grid-template-columns: 3fr 2fr;
        align-items: center;
    }
}

.feature-strategy__content {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.feature-strategy__eyebrow {
    margin: 0;
    font-size: var(--font-caption);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--primary);
    font-weight: 600;
}

.feature-strategy__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.feature-strategy__panel {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    padding: var(--space-xl);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.08);
    text-align: center;
}

.feature-strategy__stat {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    align-items: center;
}

.feature-strategy__stat-number {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
    color: var(--primary);
}

.feature-strategy__stat-label {
    font-size: var(--font-caption);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.feature-strategy__note {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.strategy-controls {
    max-width: 1100px;
    margin: 0 auto var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.strategy-controls__filters {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

@media (min-width: 768px) {
    .strategy-controls__filters {
        flex-direction: row;
        align-items: center;
        justify-content: center;
    }
}

.difficulty-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.difficulty-tab {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.65rem 1.1rem;
    border-radius: 999px;
    border: 1px solid var(--border-light);
    background: var(--card);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text);
}

.difficulty-tab {
    --difficulty-color: var(--primary);
}

.difficulty-tab:is(:hover, :focus-visible) {
    border-color: var(--difficulty-color);
    color: var(--difficulty-color);
}

.difficulty-tab.is-active {
    background: var(--difficulty-color);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.25);
}

.difficulty-tab__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.difficulty-tab__icon img {
    filter: brightness(0) saturate(100%) invert(50%) sepia(98%) saturate(500%) hue-rotate(180deg);
}

.difficulty-tab[data-difficulty="easy"] .difficulty-tab__icon img {
    filter: brightness(0) saturate(100%) invert(64%) sepia(48%) saturate(912%) hue-rotate(143deg) brightness(94%) contrast(86%);
}

.difficulty-tab[data-difficulty="medium"] .difficulty-tab__icon img {
    filter: brightness(0) saturate(100%) invert(45%) sepia(95%) saturate(1582%) hue-rotate(249deg) brightness(93%) contrast(94%);
}

.difficulty-tab[data-difficulty="hard"] .difficulty-tab__icon img {
    filter: brightness(0) saturate(100%) invert(39%) sepia(98%) saturate(6447%) hue-rotate(352deg) brightness(99%) contrast(98%);
}

.difficulty-tab[data-difficulty="expert"] .difficulty-tab__icon img {
    filter: brightness(0) saturate(100%) invert(50%) sepia(15%) saturate(989%) hue-rotate(358deg) brightness(91%) contrast(86%);
}

.difficulty-tab[data-difficulty="master"] .difficulty-tab__icon img {
    filter: brightness(0) saturate(100%) invert(12%) sepia(0%) saturate(0%) hue-rotate(0deg) brightness(95%) contrast(92%);
}

.difficulty-tab.is-active .difficulty-tab__icon img {
    filter: brightness(0) saturate(100%) invert(100%);
}

.strategy-controls__counter {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* Strategy hub TOC */
.strategy-toc {
    max-width: 600px;
    margin: 0 auto var(--space-xl);
    text-align: center;
}

.strategy-toc__heading {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin: 0 0 var(--space-sm);
}

.strategy-toc__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-xs) var(--space-md);
}

.strategy-toc__list a {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
    background: var(--card);
    color: var(--text);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.strategy-toc__list a:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* Transition copy between difficulty groups */
.strategy-group__transition {
    margin-top: var(--space-lg);
    padding: var(--space-md) var(--space-lg);
    font-size: 0.95rem;
    color: var(--text-secondary);
    border-left: 3px solid var(--primary);
    background: var(--card);
    border-radius: 0 var(--radius) var(--radius) 0;
}

.strategy-group__transition a {
    color: var(--primary);
    font-weight: 500;
}

.strategy-groups {
    display: grid;
    gap: var(--space-2xl);
    max-width: 1100px;
    margin: 0 auto var(--space-3xl);
}

.strategy-group__header {
    margin-bottom: var(--space-lg);
}

.difficulty-chip {
    display: flex;
    gap: var(--space-md);
    align-items: center;
    padding: var(--space-md);
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
    background: var(--card);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.05);
    --difficulty-color: var(--primary);
    border-left: 4px solid var(--difficulty-color);
}

.difficulty-chip__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    flex-shrink: 0;
    border-radius: var(--radius);
    background: var(--difficulty-color);
}

.difficulty-chip__icon img {
    width: 2rem;
    height: 2rem;
    display: block;
}

.difficulty-chip h2 {
    margin: 0 0 var(--space-xs);
}

.difficulty-chip p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.strategy-group__grid {
    display: grid;
    gap: var(--space-md);
}

@media (min-width: 768px) {
    .strategy-group__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.strategy-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    padding: var(--space-lg);
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
    background: var(--card);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    --difficulty-color: var(--primary);
    border-left: 4px solid var(--difficulty-color);
    min-height: 100%;
    /* Skip rendering for off-screen cards to reduce INP (OCHO-753) */
    content-visibility: auto;
    contain-intrinsic-size: auto 280px;
}

.strategy-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.strategy-card__header {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

.strategy-card__header > div {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.strategy-card__header h3 {
    margin: 0;
    line-height: 1.2;
}

.strategy-card__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.4rem;
    border-radius: var(--radius);
    background: var(--difficulty-color);
    flex-shrink: 0;
}

.strategy-card__icon img {
    width: 1.75rem;
    height: 1.75rem;
    display: block;
}

.strategy-card__level {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.2;
}

.strategy-card__summary {
    margin: 0;
    color: var(--text-secondary);
}

.strategy-card__meta {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.strategy-card__meta strong {
    color: var(--text);
}

.strategy-card__footer {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.strategy-card__link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    background: var(--difficulty-color);
    color: #ffffff;
    border: none;
    border-radius: var(--radius);
    font-size: var(--font-body);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    text-align: center;
}

.strategy-card__link:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    opacity: 0.9;
}

.strategy-empty {
    max-width: 680px;
    margin: var(--space-xl) auto;
    padding: var(--space-xl);
    text-align: center;
    border-radius: var(--radius);
    border: 1px dashed var(--border);
    color: var(--text-secondary);
}

.strategy-noscript {
    max-width: 1100px;
    margin: 0 auto var(--space-lg);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius);
    background: #fffbe6;
    border: 1px solid #ffe58f;
    color: #ad6800;
}

.strategy-learning {
    max-width: 1100px;
    margin: var(--space-2xl) auto;
    padding: var(--space-2xl) var(--space-xl);
    background: var(--card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    box-shadow: 0 22px 48px rgba(0, 0, 0, 0.05);
}

.strategy-learning h2 {
    margin-top: 0;
    margin-bottom: var(--space-lg);
    text-align: center;
}

.strategy-learning ol {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: var(--space-lg);
}

@media (min-width: 768px) {
    .strategy-learning ol {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }
}

.strategy-learning li {
    background: #f8f9fb;
    border-radius: var(--radius);
    padding: var(--space-lg);
    border-left: 4px solid var(--primary);
}

.strategy-learning h3 {
    margin-top: 0;
    margin-bottom: var(--space-xs);
}

.strategy-learning p {
    margin: 0;
    color: var(--text-secondary);
}

.strategy-support {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    gap: var(--space-md);
}

@media (min-width: 768px) {
    .strategy-support {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }
}

.strategy-support__card {
    padding: var(--space-xl);
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
    background: var(--card);
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.strategy-support__card h3 {
    margin: 0;
}

.strategy-support__card p {
    margin: 0;
    color: var(--text-secondary);
}

.strategy-support__link {
    margin-top: auto;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
}

.strategy-support__link:hover {
    text-decoration: underline;
}

.is-hidden {
    display: none !important;
}

/* Difficulty color bindings */
.difficulty-chip[data-difficulty="easy"],
.strategy-card[data-difficulty="easy"],
.strategy-card__icon[data-difficulty="easy"],
.difficulty-tab[data-difficulty="easy"] {
    --difficulty-color: var(--difficulty-easy);
}

.difficulty-chip[data-difficulty="medium"],
.strategy-card[data-difficulty="medium"],
.strategy-card__icon[data-difficulty="medium"],
.difficulty-tab[data-difficulty="medium"] {
    --difficulty-color: var(--difficulty-medium);
}

.difficulty-chip[data-difficulty="hard"],
.strategy-card[data-difficulty="hard"],
.strategy-card__icon[data-difficulty="hard"],
.difficulty-tab[data-difficulty="hard"] {
    --difficulty-color: var(--difficulty-hard);
}

.difficulty-chip[data-difficulty="expert"],
.strategy-card[data-difficulty="expert"],
.strategy-card__icon[data-difficulty="expert"],
.difficulty-tab[data-difficulty="expert"] {
    --difficulty-color: var(--difficulty-expert);
}

.difficulty-chip[data-difficulty="master"],
.strategy-card[data-difficulty="master"],
.strategy-card__icon[data-difficulty="master"],
.difficulty-tab[data-difficulty="master"] {
    --difficulty-color: var(--difficulty-master);
}

/* --------------------------------------
   Strategy page → App CTA
   -------------------------------------- */
.strategy-app-cta {
    max-width: 720px;
    margin: 2rem auto 1rem;
    padding: 1.25rem 1.5rem;
    background: var(--bg-secondary, #f5f5f5);
    border-radius: 12px;
    text-align: center;
}
.strategy-app-cta p {
    margin: 0;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary, #333);
}
.strategy-app-cta a {
    font-weight: 600;
    white-space: nowrap;
}

.strategy-daily-cta {
    max-width: 720px;
    margin: 2rem auto 1rem;
    padding: 1.25rem 1.5rem;
    background: var(--bg-secondary, #f5f5f5);
    border-radius: 12px;
    text-align: center;
}
.strategy-daily-cta p {
    margin: 0 0 1rem;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary, #333);
}
.strategy-daily-cta a:not(.button) {
    font-weight: 600;
}

/* --------------------------------------
   Experiment: Web→App conversion (sticky CTA)
   -------------------------------------- */

/* Prevent sticky CTA from covering content */
body.has-sticky-app-cta {
    padding-bottom: calc(96px + env(safe-area-inset-bottom));
}

.sticky-app-cta {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 950;
    padding: 10px 12px;
    padding-bottom: calc(10px + env(safe-area-inset-bottom));
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(0,0,0,0.08);
}

.sticky-app-cta__inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sticky-app-cta__copy {
    flex: 1;
    min-width: 0;
}

.sticky-app-cta__trust {
    font-size: 0.9rem;
    color: #2b2b2b;
    opacity: 0.9;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sticky-app-cta__button {
    white-space: nowrap;
}

.sticky-app-cta__close {
    border: none;
    background: transparent;
    font-size: 24px;
    line-height: 1;
    padding: 4px 8px;
    cursor: pointer;
    color: rgba(0,0,0,0.55);
}

@media (min-width: 769px) {
    .sticky-app-cta { display: none; }
    body.has-sticky-app-cta { padding-bottom: 0; }
}

/* Keep sticky CTA out of modal/overlay interaction layers */
body.mobile-nav-open .sticky-app-cta,
body.lang-sheet-body-lock .sticky-app-cta {
    display: none;
}

/* === CWV Performance Fixes === */

/* Reserve navigation height to prevent CLS */
#navigation {
    min-height: 77px;
}

@media (max-width: 768px) {
    #navigation {
        min-height: 56px;
    }
}

/* Reserve phone image dimensions to prevent CLS */
.phone-frame {
    aspect-ratio: 762 / 1502;
}

/* Mobile regression guardrails */
@media (max-width: 768px) {
    /* Prevent two-column hero fallback in locale pages */
    .hero-content {
        grid-template-columns: 1fr;
    }

    .hero-content > * {
        min-width: 0;
    }

    /* Responsive typography — scale down headings for mobile viewports.
       The compiled :root block only defines desktop sizes; these overrides
       were present in src/10-layout.css but missing from the build. */
    :root {
        --font-title: 2rem;
        --font-h1: 1.75rem;
        --font-h2: 1.375rem;
        --font-h3: 1.125rem;
    }

    /* Override inline font-size on h1 elements (strategies/printables pages)
       that bypasses the responsive --font-h1 variable. */
    h1[style*="font-size"] {
        font-size: var(--font-h1) !important;
    }

    /* Safety net: prevent any long word from causing horizontal overflow */
    h1, h2 {
        overflow-wrap: break-word;
    }

    /* Keep strategy/article comparison tables within viewport */
    main table {
        width: 100% !important;
        max-width: 100%;
        table-layout: fixed;
    }

    main table th,
    main table td {
        white-space: normal;
        word-break: break-word;
        overflow-wrap: anywhere;
    }

    /* Improve tap target reliability for key CTAs and footer actions */
    .btn,
    .footer-action-link,
    .footer-social a,
    .lang-pill,
    .strategy-support__link,
    .hero-quick-links a,
    .hero-secondary-links a,
    .strategy-app-cta a,
    .strategy-daily-cta a:not(.button),
    .sticky-app-cta__close {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
    }

    .btn {
        justify-content: center;
    }

    .footer-actions li {
        width: 100%;
    }

    .footer-action-link {
        width: 100%;
        padding: 10px 12px;
        border-radius: var(--radius-sm);
    }

    .footer-social a {
        min-width: 44px;
        justify-content: center;
    }

    .sticky-app-cta__close {
        min-width: 44px;
        justify-content: center;
    }
}

/* Related posts block — reusable hub-to-blog linking component (OCHO-807) */
.related-posts {
    background: var(--surface, #f9f9f9);
    border-left: 3px solid var(--primary);
    border-radius: var(--radius-sm, 6px);
    padding: 1.25rem 1.5rem;
    margin: 2rem 0;
}
.related-posts h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 0.75rem;
    color: var(--text, #1c1c1e);
}
.related-posts ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.related-posts ul li a {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.95rem;
}
.related-posts ul li a:hover {
    text-decoration: underline;
}

/* From the Blog teaser — home page (OCHO-807) */
.blog-teaser-list {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin: 0;
}
.blog-teaser-list li a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}
.blog-teaser-list li a:hover {
    text-decoration: underline;
}