/* ============================================
   Giztoy Homepage - Cosmic Theme
   ============================================ */

/* CSS Variables */
:root {
    --bg-deep: #0a0a0f;
    --bg-space: #0d0d1a;
    --bg-nebula: #1a1a2e;
    
    --text-primary: #e8e8f0;
    --text-secondary: #a0a0b8;
    --text-muted: #6a6a80;
    
    --accent-cyan: #00d4ff;
    --accent-purple: #a855f7;
    --accent-pink: #ec4899;
    --accent-blue: #3b82f6;
    
    --glow-cyan: rgba(0, 212, 255, 0.3);
    --glow-purple: rgba(168, 85, 247, 0.3);
    
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Inter', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-zh: -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
    --transition-slow: 0.8s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Starfield Canvas */
#starfield {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 1;
}

#starfield.starfield-loading {
    opacity: 0;
}

#starfield.starfield-ready {
    opacity: 1;
    transition: opacity 1s ease;
}

/* Zoom Overlay */
#zoom-overlay {
    position: fixed;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, var(--accent-cyan) 0%, var(--accent-purple) 50%, transparent 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    z-index: 1000;
    pointer-events: none;
    transition: none;
}

#zoom-overlay.zooming {
    animation: zoomPulse 1.5s ease-out forwards;
}

@keyframes zoomPulse {
    0% {
        width: 0;
        height: 0;
        opacity: 0.8;
    }
    50% {
        width: 300vmax;
        height: 300vmax;
        opacity: 0.4;
    }
    100% {
        width: 400vmax;
        height: 400vmax;
        opacity: 0;
    }
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 3rem;
    background: linear-gradient(to bottom, rgba(10, 10, 15, 0.9), transparent);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brand-icon {
    font-size: 1.5rem;
    color: var(--accent-cyan);
    text-shadow: 0 0 20px var(--glow-cyan);
}

.brand-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    letter-spacing: 0.05em;
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--accent-cyan);
}

/* Language Switch */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.8rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-body);
}

.lang-switch:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-cyan);
}

.lang-icon {
    width: 1rem;
    height: 1rem;
    color: var(--text-secondary);
}

.lang-switch:hover .lang-icon {
    color: var(--accent-cyan);
}

.lang-text {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 1.5rem;
    text-align: center;
}

.lang-switch:hover .lang-text {
    color: var(--accent-cyan);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 6rem 2rem 4rem;
    z-index: 1;
}

.hero-content {
    text-align: center;
    max-width: 900px;
}

.hero-title {
    margin-bottom: 1.5rem;
}

.title-line {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(3rem, 10vw, 7rem);
    font-weight: 900;
    letter-spacing: 0.2em;
}

.title-line .letter {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple), var(--accent-pink));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: letterShimmer 3s ease-in-out infinite;
    animation-delay: calc(var(--i) * 0.15s);
    filter: drop-shadow(0 0 20px var(--glow-cyan));
}

@keyframes letterShimmer {
    0%, 100% {
        background-position: 0% 50%;
        filter: drop-shadow(0 0 20px var(--glow-cyan));
    }
    25% {
        background-position: 100% 50%;
        filter: drop-shadow(0 0 35px var(--glow-purple));
    }
    50% {
        background-position: 100% 100%;
        filter: drop-shadow(0 0 25px var(--accent-pink));
    }
    75% {
        background-position: 0% 100%;
        filter: drop-shadow(0 0 30px var(--accent-blue));
    }
}

.hero-tagline {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 300;
    color: var(--text-muted);
    margin-bottom: 3rem;
    font-style: italic;
}

.hero-quote {
    font-size: clamp(0.9rem, 1.5vw, 1.1rem);
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 3rem;
    line-height: 1.8;
    position: relative;
}

.quote-mark {
    color: var(--accent-purple);
    font-size: 1.5em;
    opacity: 0.6;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 4px;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
}

/* Button text alignment */
.btn-text {
    line-height: 1;
}


.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    color: var(--bg-deep);
    box-shadow: 0 0 30px var(--glow-cyan);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 50px var(--glow-cyan);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--text-muted);
}

.btn-secondary:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.btn-star {
    background: linear-gradient(135deg, #f59e0b, #fbbf24);
    color: var(--bg-deep);
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.3);
}

.btn-star:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(245, 158, 11, 0.5);
}

.btn-icon {
    display: flex;
    align-items: center;
}

.btn-large {
    padding: 1.25rem 3rem;
    font-size: 1.1rem;
}

/* Button icons */
.btn svg {
    width: 1em;
    height: 1em;
    display: block;
}

.btn-arrow {
    transition: transform var(--transition-fast);
}

/* Star button icon color */
.btn-star svg {
    color: #1a1a1a;
}

.btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* Scroll Hint */
.scroll-hint {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    opacity: 0.6;
}

.scroll-text {
    font-size: 0.85rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}

.mouse-dot {
    position: absolute;
    top: 8px;
    left: 50%;
    width: 4px;
    height: 4px;
    background: var(--accent-cyan);
    border-radius: 50%;
    transform: translateX(-50%);
    animation: scrollDot 2s infinite;
}

@keyframes scrollDot {
    0%, 100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    50% {
        opacity: 0.3;
        transform: translateX(-50%) translateY(12px);
    }
}

/* Section Common Styles */
section {
    position: relative;
    z-index: 1;
    padding: 6rem 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
}

/* Features Section */
.features {
    background: linear-gradient(to bottom, transparent, rgba(26, 26, 46, 0.5), transparent);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: rgba(26, 26, 46, 0.6);
    border: 1px solid rgba(168, 85, 247, 0.2);
    border-radius: 12px;
    padding: 2rem;
    transition: all var(--transition-medium);
}

.feature-card:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.1);
    transform: translateY(-4px);
}

.feature-icon {
    margin-bottom: 1rem;
}

.feature-icon svg {
    width: 2.5rem;
    height: 2.5rem;
    stroke-width: 1.5;
}

/* Different colors for different features */
.feature-card:nth-child(1) .feature-icon { color: #a855f7; } /* purple - layers */
.feature-card:nth-child(2) .feature-icon { color: #f97316; } /* orange - hammer */
.feature-card:nth-child(3) .feature-icon { color: #ec4899; } /* pink - brain */
.feature-card:nth-child(4) .feature-icon { color: #22c55e; } /* green - shield */
.feature-card:nth-child(5) .feature-icon { color: #06b6d4; } /* cyan - audio */
.feature-card:nth-child(6) .feature-icon { color: #eab308; } /* yellow - code */

.feature-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.feature-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Architecture Section */
.architecture {
    padding: 6rem 2rem;
}

.arch-diagram {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.arch-layer {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.25rem 2rem;
    border-radius: 8px;
    border: 1px solid;
    transition: all var(--transition-fast);
}

.arch-layer:hover {
    transform: scale(1.02);
}

.arch-layer-1 {
    background: rgba(168, 85, 247, 0.15);
    border-color: rgba(168, 85, 247, 0.4);
}

.arch-layer-2 {
    background: rgba(59, 130, 246, 0.15);
    border-color: rgba(59, 130, 246, 0.4);
}

.arch-layer-3 {
    background: rgba(0, 212, 255, 0.15);
    border-color: rgba(0, 212, 255, 0.4);
}

.arch-layer-4 {
    background: rgba(236, 72, 153, 0.15);
    border-color: rgba(236, 72, 153, 0.4);
}

.arch-layer-5 {
    background: rgba(100, 100, 120, 0.15);
    border-color: rgba(100, 100, 120, 0.4);
}

.layer-name {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.layer-modules {
    font-size: 0.85rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

/* Platforms Section */
.platforms {
    background: linear-gradient(to bottom, transparent, rgba(26, 26, 46, 0.5), transparent);
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto;
}

.platform-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem;
    background: rgba(26, 26, 46, 0.4);
    border: 1px solid rgba(100, 100, 120, 0.3);
    border-radius: 12px;
    transition: all var(--transition-fast);
}

.platform-item:hover {
    border-color: var(--accent-cyan);
    background: rgba(26, 26, 46, 0.6);
}

.platform-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.platform-icon svg {
    width: 2rem;
    height: 2rem;
    stroke-width: 1.5;
}

/* Platform icon colors */
.platform-item:nth-child(1) .platform-icon { color: #22c55e; } /* green - Linux */
.platform-item:nth-child(2) .platform-icon { color: #a1a1aa; } /* silver - macOS */
.platform-item:nth-child(3) .platform-icon { color: #22c55e; } /* green - Android */
.platform-item:nth-child(4) .platform-icon { color: #3b82f6; } /* blue - iOS */
.platform-item:nth-child(5) .platform-icon { color: #ec4899; } /* pink - HarmonyOS */
.platform-item:nth-child(6) .platform-icon { color: #f97316; } /* orange - ESP32 */
.platform-item:nth-child(7) .platform-icon { color: #3b82f6; } /* blue - BLE */
.platform-item:nth-child(8) .platform-icon { color: #06b6d4; } /* cyan - OpenWrt */

.platform-name {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text-primary);
}

.platform-status {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
}

.status-ready {
    background: rgba(34, 197, 94, 0.2);
    color: #22c55e;
}

.status-wip {
    background: rgba(234, 179, 8, 0.2);
    color: #eab308;
}

/* CTA Section */
.cta {
    padding: 8rem 2rem;
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.cta-actions {
    display: flex;
    justify-content: center;
}

/* Footer */
.footer {
    position: relative;
    z-index: 1;
    padding: 4rem 2rem;
    border-top: 1px solid rgba(100, 100, 120, 0.2);
}

.footer-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.footer .footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.footer .brand-icon {
    font-size: 1.25rem;
}

.footer .brand-text {
    font-size: 1rem;
}

.footer-quote {
    font-style: italic;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-cyan);
}

.footer-copyright {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        padding: 1rem 1.5rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .hero {
        padding: 5rem 1.5rem 3rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .scroll-hint {
        display: none;
    }
    
    section {
        padding: 4rem 1.5rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .platforms-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Selection */
::selection {
    background: var(--accent-purple);
    color: var(--bg-deep);
}

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

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

::-webkit-scrollbar-thumb {
    background: rgba(100, 100, 120, 0.5);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(100, 100, 120, 0.8);
}