/* ========================================
   Simitone Website — styles.css
   Dark theme, mobile-first responsive design
   ======================================== */

/* ---- CSS Custom Properties ---- */
:root {
    /* Colors */
    --color-bg-primary: #0d1117;
    --color-bg-secondary: #161b22;
    --color-bg-tertiary: #21262d;
    --color-bg-card: #1c2128;
    --color-text-primary: #e6edf3;
    --color-text-secondary: #8b949e;
    --color-text-muted: #484f58;
    --color-text-link: #58a6ff;
    --color-text-link-hover: #79c0ff;
    --color-accent: #3fb950;
    --color-accent-hover: #4cc764;
    --color-accent-secondary: #1f6feb;
    --color-accent-secondary-hover: #388bfd;
    --color-accent-info: #17a2b8;
    --color-accent-info-hover: #138496;
    --color-warning-bg: rgba(210, 153, 34, 0.15);
    --color-warning-border: #d29922;
    --color-warning-text: #e3b341;
    --color-success: #3fb950;
    --color-danger: #f85149;
    --color-border: #30363d;
    --color-border-light: #484f58;

    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    --font-family-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    --font-size-base: 1rem;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
    --line-height-base: 1.6;
    --line-height-tight: 1.25;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Layout */
    --container-max-width: 1100px;
    --border-radius-sm: 4px;
    --border-radius-md: 6px;
    --border-radius-lg: 12px;
    --transition-speed: 0.2s;
}

/* ---- Reset & Base ---- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 70px; /* Offset for fixed navbar */
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-text-link);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

a:hover {
    color: var(--color-text-link-hover);
    text-decoration: underline;
}

code {
    font-family: var(--font-family-mono);
    font-size: 0.9em;
    background: var(--color-bg-tertiary);
    padding: 0.15em 0.4em;
    border-radius: var(--border-radius-sm);
}

pre {
    background: var(--color-bg-tertiary);
    padding: var(--space-md);
    border-radius: var(--border-radius-md);
    overflow-x: auto;
    border: 1px solid var(--color-border);
}

pre code {
    background: none;
    padding: 0;
}

h1, h2, h3, h4, h5, h6 {
    line-height: var(--line-height-tight);
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); padding-bottom: var(--space-sm); border-bottom: 1px solid var(--color-border); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

ul, ol {
    padding-left: var(--space-xl);
    margin-bottom: var(--space-md);
}

li {
    margin-bottom: var(--space-sm);
}

/* ---- Container ---- */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* ---- Navigation ---- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    height: 60px;
    display: flex;
    align-items: center;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-md);
}

.nav-brand {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-accent);
    text-decoration: none;
}

.nav-brand:hover {
    color: var(--color-accent-hover);
    text-decoration: none;
}

/* CTA nav link (Releases button) */
.nav-cta {
    color: var(--color-accent) !important;
    background: rgba(88, 166, 255, 0.1);
    border: 1px solid rgba(88, 166, 255, 0.3);
    border-radius: var(--border-radius-sm) !important;
    padding: var(--space-xs) var(--space-sm) !important;
}

.nav-cta:hover {
    background: rgba(88, 166, 255, 0.2) !important;
    color: var(--color-accent-hover) !important;
}

.nav-links {
    display: none;
    list-style: none;
    padding: 0;
    margin: 0;
    gap: var(--space-md);
}

.nav-links li {
    margin: 0;
}

.nav-links a {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    padding: var(--space-sm) 0;
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

.nav-links a:hover {
    color: var(--color-text-primary);
    text-decoration: none;
}

/* Hamburger toggle */
.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.nav-toggle-bar {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text-primary);
    margin: 3px 0;
    border-radius: 1px;
    transition: all var(--transition-speed) ease;
}

/* Mobile nav open state */
.nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md);
}

.nav-links.active li {
    margin-bottom: var(--space-sm);
}

/* ---- Sections (generic) ---- */
main section {
    padding: var(--space-2xl) 0;
}

/* ---- Hero Section ---- */
.hero-section {
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    padding: var(--space-3xl) 0;
    text-align: center;
    margin-top: 60px; /* Offset for fixed navbar */
}

.hero-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-logo {
    width: 700px;
    height: 110px;
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--space-lg);
    object-fit: cover;
}

.hero-section h1 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-sm);
    border: none;
}

.hero-tagline {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

/* Version badge */
.version-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    margin-bottom: var(--space-md);
}

.version-label {
    font-size: var(--font-size-sm);
    color: var(--color-accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.version-tag {
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    font-family: var(--font-family-mono);
}

.hero-releases-link {
    margin-top: var(--space-sm);
    font-size: var(--font-size-sm);
}

.hero-releases-link a {
    color: var(--color-text-muted);
}

.hero-releases-link a:hover {
    color: var(--color-text-link);
}

.hero-description {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    align-items: center;
}

/* ---- Buttons ---- */
.btn {
    display: inline-block;
    padding: var(--space-sm) var(--space-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border-radius: var(--border-radius-md);
    border: none;
    cursor: pointer;
    transition: background-color var(--transition-speed) ease, transform var(--transition-speed) ease;
    min-width: 200px;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--color-accent);
    color: #0d1117;
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    color: #0d1117;
}

.btn-secondary {
    background: var(--color-accent-secondary);
    color: #fff;
}

.btn-secondary:hover {
    background: var(--color-accent-secondary-hover);
    color: #fff;
}

.btn-info {
    color: #fff;
    background: var(--color-accent-info);
}

.btn-info:hover {
    color: #fff;
    background: var(--color-accent-info-hover);
}

/* ---- About Section ---- */
.about-section {
    background: var(--color-bg-primary);
}

.about-section p {
    margin-bottom: var(--space-md);
    color: var(--color-text-secondary);
}

/* ---- Notice/Callout ---- */
.notice {
    padding: var(--space-md);
    border-radius: var(--border-radius-md);
    border-left: 4px solid;
    margin: var(--space-lg) 0;
}

.notice-warning {
    background: var(--color-warning-bg);
    border-color: var(--color-warning-border);
    color: var(--color-warning-text);
}

.notice-info {
    background: rgba(88, 166, 255, 0.1);
    border-color: var(--color-text-link);
    color: var(--color-text-primary);
}

/* ---- Features Section ---- */
.features-section {
    background: var(--color-bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: var(--space-lg);
    transition: border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.feature-card:hover {
    border-color: var(--color-border-light);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.feature-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
    border: none;
    color: var(--color-accent);
}

.feature-card p {
    color: var(--color-text-secondary);
    margin: 0;
}

/* Screenshot Gallery Grid */
.screenshot-gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.gallery-item {
    position: relative;
    cursor: pointer;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border);
    min-width: 0;
    min-height: 0;
    transition: border-color var(--transition-speed) ease, transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.gallery-item:hover {
    border-color: var(--color-border-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.gallery-item:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.gallery-item > img {
    display: block;
    width: 100%;
    height: 200px;
    object-fit: cover;
    object-position: center;
    transition: transform 0.3s ease;
}

.gallery-item:hover > img {
    transform: scale(1.05);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-sm) var(--space-md);
    background: rgba(0, 0, 0, 0.65);
    pointer-events: none;
}

.gallery-caption {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: #fff;
}

/* Gallery hint text */
.gallery-hint {
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-align: center;
}

/* Lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.lightbox[hidden] {
    display: none;
}

.lightbox-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.92);
    cursor: zoom-out;
}

.lightbox-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-lg);
    z-index: 1;
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    font-size: 1.75rem;
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-speed) ease;
    line-height: 1;
}

.lightbox-close:hover {
    background: var(--color-bg-tertiary);
}

.lightbox-close:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.lightbox-img {
    position: relative;
    z-index: 1;
    max-width: 90vw;
    max-height: 80vh;
    object-fit: contain;
    border-radius: var(--border-radius-md);
}

.lightbox-caption {
    position: relative;
    z-index: 1;
    margin-top: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-align: center;
    padding: 0 var(--space-lg);
}

/* ---- Requirements Section ---- */
.requirements-section {
    background: var(--color-bg-primary);
}

.platform-table,
.cli-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--space-lg);
}

.platform-table th,
.platform-table td,
.cli-table th,
.cli-table td {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    text-align: left;
}

.platform-table th,
.cli-table th {
    background: var(--color-bg-tertiary);
    font-weight: 600;
}

.platform-table td,
.cli-table td {
    background: var(--color-bg-secondary);
}

.status-supported {
    color: var(--color-success);
    font-weight: 600;
}

.status-not-functional {
    color: var(--color-danger);
    font-weight: 600;
}

.runtime-list {
    margin-bottom: var(--space-lg);
}

.runtime-item {
    padding: var(--space-sm) 0;
    color: var(--color-text-secondary);
}

/* ---- Install Section ---- */
.install-section {
    background: var(--color-bg-secondary);
}

.install-section h3 {
    margin-top: var(--space-xl);
}

.install-section h4 {
    margin-top: var(--space-lg);
}

.install-steps {
    padding-left: var(--space-xl);
    margin-bottom: var(--space-md);
}

.install-steps li {
    margin-bottom: var(--space-md);
    color: var(--color-text-secondary);
}

/* ---- Limitations Section ---- */
.limitations-section {
    background: var(--color-bg-primary);
}

.limitations-list {
    list-style: none;
    padding: 0;
}

.limitations-list li {
    position: relative;
    padding-left: var(--space-xl);
    color: var(--color-text-secondary);
}

.limitations-list li::before {
    content: "\26A0";
    position: absolute;
    left: 0;
    color: var(--color-warning-border);
}

/* ---- Community Section ---- */
.community-section {
    background: var(--color-bg-secondary);
}

.community-links {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.community-link {
    display: flex;
    flex-direction: column;
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    text-decoration: none;
    transition: border-color var(--transition-speed) ease, background var(--transition-speed) ease;
}

.community-link:hover {
    border-color: var(--color-accent);
    background: var(--color-bg-tertiary);
    text-decoration: none;
}

.community-link-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-link);
    margin-bottom: var(--space-xs);
}

.community-link-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ---- Attributions Section ---- */
.attributions-section {
    background: var(--color-bg-primary);
}

.attribution-list {
    list-style: none;
    padding: 0;
}

.attribution-list li {
    padding: var(--space-sm) 0;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
}

.attribution-list li:last-child {
    border-bottom: none;
}

/* ---- Footer ---- */
.site-footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--space-xl) 0;
    text-align: center;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.site-footer p {
    margin-bottom: var(--space-sm);
}

.site-footer a {
    color: var(--color-text-link);
}

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

/* ---- Accessibility ---- */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Ensure links are visible on focus */
a:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ---- Responsive: Tablet (768px+) ---- */
@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }

    .nav-links {
        display: flex;
        flex-direction: row;
    }

    .hero-buttons {
        flex-direction: row;
        justify-content: center;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .community-links {
        grid-template-columns: repeat(2, 1fr);
    }

    h1 { font-size: calc(var(--font-size-3xl) * 1.1); }
    h2 { font-size: calc(var(--font-size-2xl) * 1.1); }
}

/* ---- Responsive: Desktop (1024px+) ---- */
@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .community-links {
        grid-template-columns: repeat(3, 1fr);
    }

    .container {
        padding: 0 var(--space-xl);
    }
}

/* ---- Responsive: Large Desktop (1920px+) ---- */
@media (min-width: 1920px) {
    :root {
        --font-size-base: 1.125rem;
        --font-size-sm: 1rem;
        --font-size-lg: 1.25rem;
        --font-size-xl: 1.75rem;
        --font-size-2xl: 2.25rem;
        --font-size-3xl: 3rem;
    }

    .container {
        max-width: 1400px;
    }
}

/* ---- Small Mobile (320px) ---- */
@media (max-width: 400px) {
    .hero-section h1 {
        font-size: var(--font-size-2xl);
    }

    .hero-tagline {
        font-size: var(--font-size-base);
    }

    .btn {
        min-width: 100%;
    }

    .platform-table,
    .cli-table {
        font-size: var(--font-size-sm);
    }

    .platform-table,
    .cli-table {
        font-size: var(--font-size-sm);
    }

    .platform-table th,
    .platform-table td,
    .cli-table th,
    .cli-table td {
        padding: var(--space-xs) var(--space-sm);
    }

    /* Gallery single column on small screens */
    .screenshot-gallery {
        grid-template-columns: 1fr;
    }

    .gallery-item img {
        height: 220px;
    }
}

/* ---- What's Different Section ---- */
.whats-different-section {
    background: var(--color-bg-primary);
}

.fork-features {
    padding-left: var(--space-xl);
    margin-bottom: var(--space-lg);
}

.fork-features li {
    margin-bottom: var(--space-md);
    color: var(--color-text-secondary);
}

/* ---- Building from Source Section ---- */
.building-section {
    background: var(--color-bg-secondary);
}

.building-section h3 {
    margin-top: var(--space-xl);
}

.building-section h4 {
    margin-top: var(--space-lg);
}

/* Install commands (nested list in requirements) */
.install-cmds {
    margin-top: var(--space-sm);
    padding-left: var(--space-lg);
}

.install-cmds li {
    margin-bottom: var(--space-xs);
}

.install-cmds code {
    background: var(--color-bg-tertiary);
    display: inline-block;
    padding: 0.1em 0.4em;
}

/* ---- Releases Page ---- */
.releases-header-section {
    padding: var(--space-3xl) 0 var(--space-xl);
    margin-top: var(--nav-height);
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    text-align: center;
}

.releases-header-section h1 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-sm);
    border: none;
}

.releases-subtitle {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.releases-api-hint {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.releases-list-section {
    background: var(--color-bg-secondary);
    padding: var(--space-2xl) 0;
}

.releases-container {
    max-width: 800px;
    margin: 0 auto;
}

.releases-loading,
.releases-error {
    text-align: center;
    padding: var(--space-3xl) var(--space-lg);
    color: var(--color-text-secondary);
}

.releases-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

/* Release Card */
.release-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
}

.release-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-md);
    gap: var(--space-md);
}

.release-title-group {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.release-title {
    font-size: var(--font-size-xl);
    margin: 0;
    border: none;
    color: var(--color-text-primary);
}

.release-prerelease-badge {
    display: inline-block;
    padding: 2px var(--space-sm);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-warning-text);
    background: var(--color-warning-bg);
    border: 1px solid var(--color-warning-border);
    border-radius: 12px;
}

.release-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    white-space: nowrap;
}

.release-body {
    margin-bottom: var(--space-lg);
}

.release-body p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
    line-height: 1.7;
}

.release-body ul {
    margin-bottom: var(--space-sm);
}

.release-body li {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xs);
}

.release-notes-empty {
    color: var(--color-text-muted);
    font-style: italic;
}

.release-downloads {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

/* Small button variant for release downloads */
.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--font-size-sm);
    min-width: auto;
}