/* ═══════════════════════════════════════════════════════════
   Snailink — Design System (Pixel Art Light Theme)
   ═══════════════════════════════════════════════════════════ */

/* ── CSS Variables ──────────────────────────────────────── */
:root {
    /* Colors — Light, warm, natural */
    --bg-primary: #f5f0e8;
    --bg-secondary: #eae5d8;
    --bg-card: #ffffff;
    --bg-input: #faf8f4;

    --text-primary: #2c2c2c;
    --text-secondary: #6b6b6b;
    --text-muted: #9a9a9a;

    --accent-green: #2d5016;
    --accent-green-light: #4a7a2e;
    --accent-green-pale: #e8f0e0;
    --accent-orange: #c4712b;
    --accent-red: #9b2c2c;
    --accent-red-pale: #f8e8e8;
    --accent-blue: #2c5f9b;

    --border-color: #d4cfc4;
    --border-dark: #2c2c2c;
    --shadow-color: #2c2c2c;

    /* Pixel border width */
    --pixel-border: 3px;

    /* Fonts */
    --font-pixel: 'Press Start 2P', monospace;
    --font-mono: 'Space Mono', 'Courier New', monospace;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-xxl: 48px;

    /* Sizing */
    --max-width: 960px;
    --navbar-height: 64px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-mono);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

#page-content {
    flex: 1;
    padding-top: var(--navbar-height);
}

/* ── Typography ────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-pixel);
    line-height: 1.4;
    letter-spacing: -0.5px;
}

h1 { font-size: 20px; }
h2 { font-size: 14px; }
h3 { font-size: 12px; }
h4 { font-size: 10px; }

p {
    font-size: 13px;
    line-height: 1.7;
}

a {
    color: var(--accent-green);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-green-light);
    text-decoration: underline;
}

/* ── Pixel Border Utility ──────────────────────────────── */
.pixel-border {
    border: var(--pixel-border) solid var(--border-dark);
    box-shadow:
        var(--pixel-border) var(--pixel-border) 0 var(--shadow-color);
}

.pixel-border-light {
    border: var(--pixel-border) solid var(--border-color);
    box-shadow:
        2px 2px 0 var(--border-color);
}

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

/* ── Scrollbar ─────────────────────────────────────────── */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ── Utility Classes ───────────────────────────────────── */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent-green); }
.text-alert { color: var(--accent-red); }
.text-small { font-size: 11px; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.hidden { display: none !important; }

/* ── Animations ────────────────────────────────────────── */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-16px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

@keyframes typeOut {
    from { width: 0; }
    to { width: 100%; }
}

.animate-in {
    animation: fadeIn 0.4s ease-out;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

/* ── Scroll Reveal ────────────────────────────────────── */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 768px) {
    h1 { font-size: 16px; }
    h2 { font-size: 12px; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .container { padding: 0 var(--space-md); }
    :root { --navbar-height: 56px; }
}

@media (max-width: 480px) {
    h1 { font-size: 13px; }
    p { font-size: 12px; }
}