/* ========================================
   AKASHIC (HK) TECH LIMITED - Premium Tech Website
   Visual Style: Minimal Luxury + Future Tech
   Color Palette: Deep Space Gray, Mist Blue, Matte Silver
   ======================================== */

/* CSS Variables - Premium Color System */
:root {
    /* Primary Colors - Deep Space Tech Palette */
    --deep-space: #0a0e17;
    --deep-space-light: #111827;
    --mist-blue: #1e293b;
    --mist-blue-light: #334155;
    --matte-silver: #94a3b8;
    --matte-silver-light: #cbd5e1;
    
    /* Accent Colors - Ice & Light Blue */
    --ice-white: #f8fafc;
    --ice-blue: #e2e8f0;
    --light-blue: #60a5fa;
    --light-blue-glow: rgba(96, 165, 250, 0.15);
    --cyan-accent: #22d3ee;
    --cyan-glow: rgba(34, 211, 238, 0.2);
    
    /* Gradient Definitions */
    --gradient-primary: linear-gradient(135deg, #0a0e17 0%, #1e293b 50%, #111827 100%);
    --gradient-card: linear-gradient(145deg, rgba(30, 41, 59, 0.6) 0%, rgba(17, 24, 39, 0.8) 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
    --gradient-accent: linear-gradient(135deg, #60a5fa 0%, #22d3ee 100%);
    
    /* Glass Effect */
    --glass-bg: rgba(17, 24, 39, 0.7);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: blur(20px);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-tech: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Spacing Scale */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(96, 165, 250, 0.15);
    --shadow-glow-cyan: 0 0 30px rgba(34, 211, 238, 0.2);
}

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

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

body {
    font-family: var(--font-primary);
    background: var(--deep-space);
    color: var(--ice-white);
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Selection */
::selection {
    background: rgba(96, 165, 250, 0.3);
    color: var(--ice-white);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--mist-blue-light);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--matte-silver);
}

/* ========================================
   PARTICLE BACKGROUND
   ======================================== */
#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ========================================
   NAVIGATION - Glass Morphism
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: all var(--transition-smooth);
    background: transparent;
}

.navbar.scrolled {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    padding: 0.75rem 0;
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 2px;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: transform var(--transition-fast);
}

.logo:hover {
    transform: scale(1.02);
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
    list-style: none;
}

.nav-links a {
    color: var(--matte-silver-light);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    position: relative;
    padding: 0.5rem 0;
    transition: color var(--transition-fast);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--gradient-accent);
    transition: width var(--transition-smooth);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--ice-white);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.lang-btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--matte-silver);
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-btn:hover {
    color: var(--ice-white);
    border-color: var(--matte-silver);
}

.lang-btn.active {
    color: var(--deep-space);
    background: var(--gradient-accent);
    border-color: transparent;
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background: var(--ice-white);
    transition: all var(--transition-fast);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--space-3xl) var(--space-lg);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(96, 165, 250, 0.08) 0%, transparent 70%);
    pointer-events: none;
    animation: pulse-glow 8s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.8; transform: translate(-50%, -50%) scale(1.1); }
}

.hero-content {
    text-align: center;
    max-width: 900px;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--gradient-glass);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--light-blue);
    margin-bottom: var(--space-lg);
    animation: fade-in-up 0.8s ease-out;
}

.hero-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--cyan-accent);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

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

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-md);
    letter-spacing: -1px;
}

.hero-title .gradient-text {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--matte-silver);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-decoration: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--deep-space);
    border: none;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
}

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

.btn-primary:hover::before {
    left: 100%;
}

.btn-secondary {
    background: transparent;
    color: var(--ice-white);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: var(--gradient-glass);
    border-color: var(--matte-silver);
    transform: translateY(-2px);
}

/* ========================================
   SECTIONS
   ======================================== */
.section {
    padding: var(--space-3xl) var(--space-lg);
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-2xl);
}

.section-label {
    display: inline-block;
    font-family: var(--font-tech);
    font-size: 0.75rem;
    color: var(--light-blue);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: var(--space-sm);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.section-desc {
    color: var(--matte-silver);
    font-size: 1.1rem;
    line-height: 1.8;
}

/* ========================================
   CARDS - Glass Morphism
   ======================================== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.card {
    background: var(--gradient-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: var(--space-xl);
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(96, 165, 250, 0.5), transparent);
    opacity: 0;
    transition: opacity var(--transition-smooth);
}

.card:hover {
    transform: translateY(-8px);
    border-color: rgba(96, 165, 250, 0.3);
    box-shadow: var(--shadow-glow);
}

.card:hover::before {
    opacity: 1;
}

.card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-glass);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    margin-bottom: var(--space-md);
    font-size: 1.5rem;
    transition: all var(--transition-smooth);
}

.card:hover .card-icon {
    background: var(--light-blue-glow);
    border-color: var(--light-blue);
    transform: scale(1.05);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--ice-white);
}

.card-text {
    color: var(--matte-silver);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ========================================
   FEATURES SECTION
   ======================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.feature-item {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--gradient-glass);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    transition: all var(--transition-smooth);
}

.feature-item:hover {
    background: rgba(96, 165, 250, 0.05);
    border-color: rgba(96, 165, 250, 0.2);
    transform: translateX(5px);
}

.feature-number {
    font-family: var(--font-tech);
    font-size: 0.75rem;
    color: var(--light-blue);
    opacity: 0.6;
}

.feature-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--ice-white);
}

.feature-content p {
    color: var(--matte-silver);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ========================================
   STATS SECTION
   ======================================== */
.stats-section {
    background: var(--gradient-glass);
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.stat-item {
    text-align: center;
    padding: var(--space-lg);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-xs);
}

.stat-label {
    color: var(--matte-silver);
    font-size: 0.9rem;
    letter-spacing: 1px;
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

.about-block {
    margin-bottom: var(--space-2xl);
    padding-left: var(--space-lg);
    border-left: 2px solid var(--glass-border);
    transition: border-color var(--transition-smooth);
}

.about-block:hover {
    border-left-color: var(--light-blue);
}

.about-block h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--ice-white);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.about-block h3::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--cyan-accent);
    border-radius: 50%;
}

.about-block p {
    color: var(--matte-silver);
    line-height: 2;
    font-size: 1rem;
}

/* ========================================
   TEAM SECTION
   ======================================== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.team-member {
    text-align: center;
    padding: var(--space-lg);
    transition: transform var(--transition-smooth);
}

.team-member:hover {
    transform: translateY(-5px);
}

.team-avatar {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--space-md);
    background: var(--gradient-glass);
    border: 2px solid var(--glass-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    transition: all var(--transition-smooth);
}

.team-member:hover .team-avatar {
    border-color: var(--light-blue);
    box-shadow: var(--shadow-glow);
}

.team-name {
    font-weight: 600;
    color: var(--ice-white);
    margin-bottom: 0.25rem;
}

.team-role {
    font-size: 0.85rem;
    color: var(--matte-silver);
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    max-width: 1200px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.contact-item {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--gradient-glass);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    transition: all var(--transition-smooth);
}

.contact-item:hover {
    border-color: rgba(96, 165, 250, 0.3);
    transform: translateX(5px);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-blue-glow);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 0.85rem;
    color: var(--matte-silver);
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-details p,
.contact-details a {
    color: var(--ice-white);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.contact-details a:hover {
    color: var(--light-blue);
}

/* Contact Form */
.contact-form {
    background: var(--gradient-card);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: var(--space-xl);
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    font-size: 0.85rem;
    color: var(--matte-silver);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 1rem;
    background: rgba(10, 14, 23, 0.5);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--ice-white);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--light-blue);
    box-shadow: 0 0 0 3px var(--light-blue-glow);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--matte-silver);
    opacity: 0.5;
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-submit {
    width: 100%;
    padding: 1rem;
    background: var(--gradient-accent);
    border: none;
    border-radius: 8px;
    color: var(--deep-space);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-smooth);
}

.form-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-cyan);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    padding: var(--space-xl) var(--space-lg);
    background: var(--deep-space-light);
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 2px;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-copy {
    color: var(--matte-silver);
    font-size: 0.85rem;
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger delays */
.animate-on-scroll:nth-child(1) { transition-delay: 0.1s; }
.animate-on-scroll:nth-child(2) { transition-delay: 0.2s; }
.animate-on-scroll:nth-child(3) { transition-delay: 0.3s; }
.animate-on-scroll:nth-child(4) { transition-delay: 0.4s; }

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-md);
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .section {
        padding: var(--space-2xl) var(--space-md);
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .lang-switcher {
        display: none;
    }
}

/* ========================================
   DATA FLOW ANIMATION (Background)
   ======================================== */
.data-flow {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
    opacity: 0.03;
}

.data-line {
    position: absolute;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--light-blue), transparent);
    animation: data-flow-animation 15s linear infinite;
}

@keyframes data-flow-animation {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100vw); }
}

/* Neural Network Lines */
.neural-line {
    position: absolute;
    background: linear-gradient(180deg, transparent, rgba(96, 165, 250, 0.1), transparent);
    width: 1px;
    animation: neural-pulse 4s ease-in-out infinite;
}

@keyframes neural-pulse {
    0%, 100% { opacity: 0.1; }
    50% { opacity: 0.3; }
}