/* CSS RESET & VARIABLES */
:root {
    --bg-primary: #0a0b0d;
    --bg-secondary: #121418;
    --bg-tertiary: #1a1d24;
    
    --border-color: rgba(255, 255, 255, 0.06);
    --border-color-hover: rgba(255, 255, 255, 0.12);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent-color: #6366f1; /* Premium Violet/Indigo */
    --accent-gradient: linear-gradient(135deg, #818cf8 0%, #6366f1 100%);
    
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --card-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
    position: relative;
    line-height: 1.6;
}

/* Background Texture / Grid & Noise */
.bg-noise {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    content: "";
    opacity: 0.02;
    z-index: 9999;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3联%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* Radial Glows */
body::before {
    content: "";
    position: absolute;
    top: -10%;
    left: 50%;
    transform: translateX(-50%);
    width: 80vw;
    height: 60vh;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, rgba(0,0,0,0) 70%);
    z-index: -1;
    pointer-events: none;
}

/* HEADER */
.site-header {
    width: 100%;
    padding: 2rem 0;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 100;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo-dot {
    width: 8px;
    height: 8px;
    background-color: var(--text-primary);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--text-primary);
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.nav-cta {
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1.25rem;
    border: 1px solid var(--border-color);
    border-radius: 100px;
    transition: var(--transition-smooth);
    background: rgba(255, 255, 255, 0.01);
}

.nav-cta:hover {
    color: var(--text-primary);
    border-color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

/* HERO SECTION */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem 2rem 4rem;
    text-align: center;
    position: relative;
}

.hero-container {
    max-width: 800px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    animation: fadeInDown 0.8s ease;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background-color: var(--accent-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.7);
    }
    70% {
        transform: scale(1);
        box-shadow: 0 0 0 8px rgba(99, 102, 241, 0);
    }
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0);
    }
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease;
}

.text-highlight {
    background: linear-gradient(180deg, #ffffff 30%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 640px;
    margin-bottom: 3rem;
    line-height: 1.6;
    font-weight: 300;
    animation: fadeInUp 1s ease;
}

/* HERO FORM */
.hero-form {
    width: 100%;
    max-width: 500px;
    margin-bottom: 4rem;
    animation: fadeInUp 1.2s ease;
}

.input-group {
    display: flex;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    padding: 0.4rem;
    border-radius: 12px;
    transition: var(--transition-smooth);
}

.input-group:focus-within {
    border-color: rgba(255, 255, 255, 0.25);
    background: rgba(255, 255, 255, 0.04);
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.02);
}

.hero-form input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    padding: 0.8rem 1rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
}

.hero-form input::placeholder {
    color: var(--text-muted);
}

.hero-form button {
    background: var(--text-primary);
    color: var(--bg-primary);
    border: none;
    outline: none;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-smooth);
}

.hero-form button svg {
    transition: var(--transition-smooth);
}

.hero-form button:hover {
    background: #ffffff;
    transform: translateY(-1px);
}

.hero-form button:hover svg {
    transform: translateX(3px);
}

.form-feedback {
    margin-top: 0.75rem;
    font-size: 0.85rem;
    min-height: 1.2rem;
    transition: opacity 0.3s ease;
}

.form-feedback.success {
    color: #34d399;
}

/* SCROLL INDICATOR */
.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    opacity: 0.6;
    transition: var(--transition-smooth);
    margin-top: 1rem;
}

.scroll-indicator:hover {
    opacity: 1;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--text-primary), transparent);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--text-primary);
    animation: scrollAnimation 2s cubic-bezier(0.16, 1, 0.3, 1) infinite;
}

.scroll-text {
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    font-weight: 500;
    color: var(--text-secondary);
}

@keyframes scrollAnimation {
    0% { transform: translateY(-100%); }
    80% { transform: translateY(100%); }
    100% { transform: translateY(100%); }
}

/* APPLICATIONS SECTION */
.apps-section {
    padding: 8rem 2rem;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    position: relative;
}

.apps-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 5rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.05rem;
    font-weight: 300;
}

/* APPS GRID */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
}

.app-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    color: inherit;
    text-decoration: none;
    transition: var(--transition-smooth);
    box-shadow: var(--card-shadow);
}

.app-card:hover,
.app-card:focus-visible {
    transform: translateY(-8px);
    border-color: var(--border-color-hover);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
}

.app-card:focus-visible {
    outline: 2px solid var(--text-primary);
    outline-offset: 4px;
}

.app-image-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    background: #0d0f12;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
}

.app-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.app-card:hover .app-image {
    transform: scale(1.03);
}

.coming-soon-badge {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    background: rgba(10, 11, 13, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #ffffff;
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0.4rem 0.85rem;
    border-radius: 100px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.app-content {
    padding: 2.25rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.app-icon-wrapper {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    transition: var(--transition-smooth);
}

.app-card:hover .app-icon-wrapper {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}

.app-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.app-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    font-weight: 300;
}

/* FOOTER */
.site-footer {
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.copyright {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-smooth);
    border: 1px solid var(--border-color);
    padding: 0.6rem 1.2rem;
    border-radius: 100px;
    background: rgba(255, 255, 255, 0.01);
}

.contact-link:hover {
    color: var(--text-primary);
    border-color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
}

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

/* KEYFRAMES FOR HERO ANIMATIONS */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* RESPONSIVE DESIGN */
@media (max-width: 1100px) {
    .apps-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .hero-title {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .apps-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .footer-container {
        flex-direction: column;
        text-align: center;
    }
}