/* ============================================================
   Spark + - GitHub Pages Stylesheet
   Domain: sparkplus.se
   Iver colour scheme (gold / dark)
   ============================================================ */

/* --- Font --- */
@font-face {
    font-family: 'Inter';
    src: url('fonts/Inter-Variable.ttf') format('truetype');
    font-weight: 100 900;
    font-display: swap;
    font-style: normal;
}

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

:root {
    --color-bg: #1a1a1a;
    --color-surface: #2d2d2d;
    --color-surface-alt: #323232;
    --color-border: #444;
    --color-text: #ebf1fd;
    --color-text-muted: #8492a7;
    --color-primary: #FCDE06;
    --color-primary-hover: #FFD700;
    --color-primary-glow: rgba(252, 222, 6, 0.25);
    --color-accent: #FCDE06;
    --color-accent-glow: rgba(252, 222, 6, 0.15);
    --font-base: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.35);
    --max-width: 1120px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-base);
    line-height: 1.7;
    color: var(--color-text);
    background: linear-gradient(135deg, var(--color-bg) 0%, #2d2d2d 100%);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-primary-hover);
    text-decoration: none;
    transition: color 0.2s ease;
}
a:hover {
    color: #fff;
}

code {
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 2px 6px;
    font-size: 0.88em;
    font-family: 'Fira Code', 'Cascadia Code', monospace;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(26, 26, 26, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 1.1rem;
}

.logo-bird {
    width: 36px;
    height: 36px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    filter: invert(1);
}

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: var(--color-primary);
    color: #1a1a1a;
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: -0.5px;
}

.logo-icon-sm {
    width: 28px;
    height: 28px;
    font-size: 0.65rem;
}

.logo-text {
    color: var(--color-text);
}

a.logo {
    text-decoration: none;
    color: inherit;
}

a.logo:hover {
    color: inherit;
}

.nav-links {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 28px;
}

.nav-links a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-links a:hover {
    color: var(--color-primary);
}

/* --- Language Toggle --- */
.lang-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 12px;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    background: var(--color-surface-alt);
    color: var(--color-primary);
    font-family: var(--font-base);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.lang-toggle:hover {
    background: var(--color-primary);
    color: #1a1a1a;
    border-color: var(--color-primary);
}

/* --- Hero --- */
.hero {
    padding: 160px 0 100px;
    text-align: center;
    background:
        radial-gradient(ellipse 60% 50% at 50% 0%, var(--color-primary-glow) 0%, transparent 70%),
        var(--color-bg);
}

.hero-content {
    max-width: 720px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 999px;
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.hero-logo {
    display: block;
    max-width: 480px;
    width: 100%;
    height: auto;
    margin: 0 auto 24px;
    filter: drop-shadow(0 0 40px var(--color-primary-glow));
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    max-width: 560px;
    margin: 0 auto 32px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-compat {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    max-width: 480px;
    margin: 16px auto 0;
    line-height: 1.5;
    opacity: 0.75;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    text-decoration: none;
    font-family: var(--font-base);
}

.btn-primary {
    background: var(--color-primary);
    color: #1a1a1a;
    box-shadow: 0 0 20px var(--color-primary-glow);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    color: #1a1a1a;
    box-shadow: 0 0 30px rgba(252, 222, 6, 0.45);
    transform: translateY(-1px);
}

.version-badge-link {
    text-decoration: none;
    color: inherit;
}

.version-badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    color: var(--color-primary);
    font-size: 0.88rem;
    font-weight: 500;
    font-family: 'Fira Code', 'Cascadia Code', monospace;
}

/* --- Section Titles --- */
.section-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 48px;
    text-align: center;
    color: var(--color-text);
}

/* --- Features --- */
.features {
    padding: 100px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: border-color 0.25s ease, transform 0.25s ease;
}

.feature-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: rgba(252, 222, 6, 0.1);
    margin-bottom: 20px;
}

.feature-icon-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    filter: brightness(0) saturate(100%) invert(87%) sepia(46%) saturate(1000%) hue-rotate(358deg) brightness(103%) contrast(98%);
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-primary);
}

.feature-card p {
    color: var(--color-text-muted);
    font-size: 0.92rem;
    line-height: 1.65;
}

/* --- Installation --- */
.installation {
    padding: 100px 0;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.steps {
    max-width: 640px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.step {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.step-number {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #1a1a1a;
    font-weight: 700;
    font-size: 1rem;
}

.step-content h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.step-content p {
    color: var(--color-text-muted);
    font-size: 0.92rem;
    line-height: 1.65;
}

.inline-icon {
    display: inline-block;
    height: 0.95em;
    width: 0.95em;
    max-height: 0.95em;
    max-width: 0.95em;
    vertical-align: middle;
    margin: 0 2px;
}

/* --- Changelog --- */
.changelog {
    padding: 100px 0;
}

.changelog-scroll {
    max-height: 450px;
    overflow-y: auto;
    padding-right: 8px;
}

.changelog-scroll::-webkit-scrollbar {
    width: 6px;
}

.changelog-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.changelog-scroll::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
}

.changelog-scroll::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

.changelog-entry {
    max-width: 640px;
    margin: 0 auto;
    display: flex;
    gap: 24px;
    padding: 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.changelog-version {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
    min-width: 90px;
}

.tag {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tag-latest {
    background: rgba(252, 222, 6, 0.15);
    color: var(--color-primary);
}

.changelog-ver {
    font-family: 'Fira Code', 'Cascadia Code', monospace;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.changelog-details {
    flex: 1;
}

.changelog-date {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.changelog-details ul {
    list-style: none;
    padding: 0;
}

.changelog-details li {
    position: relative;
    padding-left: 18px;
    margin-bottom: 6px;
    font-size: 0.92rem;
    color: var(--color-text-muted);
}

.changelog-details li::before {
    content: '+';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

/* --- Footer Tools --- */
.footer-tools {
    text-align: center;
    padding-bottom: 32px;
    margin-bottom: 32px;
    border-bottom: 1px solid var(--color-border);
}

.footer-tools h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 16px;
}

.tools-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.tool-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-surface-alt);
    text-decoration: none;
    transition: border-color 0.2s ease;
}

.tool-link:hover {
    border-color: var(--color-primary);
}

.tool-link-name {
    font-weight: 600;
    font-size: 0.88rem;
    color: var(--color-primary);
}

.tool-link-desc {
    font-size: 0.82rem;
    color: var(--color-text-muted);
}

/* --- Footer --- */
.footer {
    padding: 48px 0 28px;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.footer-description {
    text-align: center;
    max-width: 640px;
    margin: 0 auto;
}

.footer-tagline {
    color: var(--color-text-muted);
    font-size: 0.92rem;
    line-height: 1.7;
    margin-bottom: 12px;
}

.footer-author {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    margin-bottom: 4px;
}

.footer-author strong {
    color: var(--color-text);
}

.footer-link {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.footer-link a {
    color: var(--color-primary);
    font-weight: 500;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.footer-left {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.95rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--color-text);
    font-weight: 600;
    font-size: 0.95rem;
}

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

.footer-center p {
    color: var(--color-text-muted);
    font-size: 0.82rem;
}

.footer-right a {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-weight: 500;
}

.footer-right a:hover {
    color: var(--color-primary);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero {
        padding: 120px 0 60px;
    }

    .hero-logo {
        max-width: 280px;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .changelog-entry {
        flex-direction: column;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}