/* ============================================================
   NISH AJITSARIA – AI & ENGINEERING LEADERSHIP PLATFORM
   Design System: Neural Intelligence + Financial Data Systems
   ============================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700;800;900&display=swap');

/* ── CSS Variables ── */
:root {
    /* Primary Palette */
    --primary: #00d4ff;
    --primary-dark: #0099cc;
    --primary-glow: rgba(0, 212, 255, 0.3);
    --primary-subtle: rgba(0, 212, 255, 0.08);

    /* Accent */
    --accent: #7b61ff;
    --accent-glow: rgba(123, 97, 255, 0.3);
    --accent-subtle: rgba(123, 97, 255, 0.08);

    /* Secondary Accent */
    --secondary: #00ffc8;
    --secondary-glow: rgba(0, 255, 200, 0.25);

    /* Neutrals */
    --bg-deep: #03070f;
    --bg-dark: #060d1b;
    --bg-card: rgba(10, 20, 40, 0.6);
    --bg-glass: rgba(12, 24, 48, 0.45);
    --bg-elevated: rgba(15, 30, 60, 0.5);

    --text-primary: #e8edf5;
    --text-secondary: #8a95a8;
    --text-muted: #4a5568;
    --text-highlight: #ffffff;

    --border-subtle: rgba(0, 212, 255, 0.1);
    --border-glass: rgba(255, 255, 255, 0.06);
    --border-active: rgba(0, 212, 255, 0.3);

    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #03070f 0%, #0a1628 40%, #0d1f3c 70%, #061224 100%);
    --gradient-card: linear-gradient(145deg, rgba(10, 25, 50, 0.7), rgba(5, 15, 35, 0.4));
    --gradient-accent: linear-gradient(135deg, #00d4ff, #7b61ff);
    --gradient-glow: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(123, 97, 255, 0.15));
    --gradient-text: linear-gradient(135deg, #00d4ff, #7b61ff, #00ffc8);

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;

    /* Typography */
    --font-display: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Effects */
    --glass-blur: blur(20px);
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-elevated: 0 20px 60px rgba(0, 0, 0, 0.5);

    /* Transitions */
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-fast: 0.2s var(--ease-smooth);
    --transition-base: 0.35s var(--ease-smooth);
    --transition-slow: 0.6s var(--ease-smooth);

    /* Layout */
    --container-max: 1280px;
    --container-wide: 1440px;
    --nav-height: 72px;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
    --border-radius-xl: 28px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

::selection {
    background: rgba(0, 212, 255, 0.3);
    color: #fff;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover { color: #fff; }

img {
    max-width: 100%;
    display: block;
}

/* ── Background Neural Grid ── */
.neural-bg {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.neural-bg::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background:
        radial-gradient(ellipse 800px 600px at 20% 20%, rgba(0, 212, 255, 0.04) 0%, transparent 70%),
        radial-gradient(ellipse 600px 800px at 80% 80%, rgba(123, 97, 255, 0.03) 0%, transparent 70%),
        radial-gradient(ellipse 400px 400px at 50% 50%, rgba(0, 255, 200, 0.02) 0%, transparent 70%);
    animation: neuralPulse 12s ease-in-out infinite alternate;
}

.neural-bg::after {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridScroll 20s linear infinite;
}

@keyframes neuralPulse {
    0% { opacity: 0.6; transform: scale(1); }
    100% { opacity: 1; transform: scale(1.05); }
}

@keyframes gridScroll {
    0% { transform: translate(0, 0); }
    100% { transform: translate(60px, 60px); }
}

/* ── Floating Particles Canvas ── */
#particles-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 1;
}

/* ── Navigation ── */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-lg);
    background: rgba(3, 7, 15, 0.85);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-subtle);
    z-index: 1000;
    transition: all var(--transition-base);
}

.nav.scrolled {
    background: rgba(3, 7, 15, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-highlight);
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.nav-logo .logo-dot {
    width: 8px; height: 8px;
    background: var(--gradient-accent);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--primary-glow);
    animation: logoPulse 2s ease-in-out infinite;
}

@keyframes logoPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.8); }
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    list-style: none;
}

.nav-links a {
    font-family: var(--font-body);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 0.5rem 0.9rem;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    position: relative;
    letter-spacing: 0.01em;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
    background: var(--primary-subtle);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 2px; left: 50%;
    transform: translateX(-50%);
    width: 16px; height: 2px;
    background: var(--primary);
    border-radius: 1px;
}

/* Mobile Menu */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 8px;
}

.nav-toggle span {
    width: 22px; height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ── Page Content Wrapper ── */
.page-content {
    position: relative;
    z-index: 2;
    padding-top: var(--nav-height);
}

/* ── Hero Sections ── */
.hero {
    min-height: 92vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: var(--space-3xl) var(--space-lg);
}

.hero-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

.hero-content {
    position: relative;
    z-index: 3;
}

.hero-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-smooth) forwards;
}

.hero-label::before {
    content: '';
    width: 24px; height: 1px;
    background: var(--primary);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 5vw, 4.5rem);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.03em;
    color: var(--text-highlight);
    margin-bottom: var(--space-md);
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-smooth) 0.15s forwards;
}

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

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.75;
    max-width: 520px;
    margin-bottom: var(--space-lg);
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-smooth) 0.3s forwards;
}

.hero-image-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    animation: fadeInScale 1s var(--ease-smooth) 0.4s forwards;
}

.hero-image-frame {
    position: relative;
    width: 380px;
    height: 460px;
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    border: 1px solid var(--border-glass);
    box-shadow: var(--shadow-elevated);
}

.hero-image-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}

.hero-image-frame::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(3, 7, 15, 0.6) 100%);
    pointer-events: none;
}

.hero-image-glow {
    position: absolute;
    width: 450px; height: 450px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
    filter: blur(60px);
    animation: glowPulse 6s ease-in-out infinite alternate;
}

/* Data Overlay on Hero Image */
.hero-data-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 2;
}

.data-tag {
    position: absolute;
    background: rgba(0, 212, 255, 0.08);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(0, 212, 255, 0.15);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--primary);
    white-space: nowrap;
    animation: float 4s ease-in-out infinite;
}

.data-tag:nth-child(1) { top: 15%; right: -10%; animation-delay: 0s; }
.data-tag:nth-child(2) { bottom: 25%; right: -15%; animation-delay: 1.5s; }
.data-tag:nth-child(3) { top: 40%; left: -12%; animation-delay: 0.8s; }

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

.section-inner {
    max-width: var(--container-max);
    margin: 0 auto;
}

.section-header {
    margin-bottom: var(--space-xl);
}

.section-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-label::before {
    content: '';
    width: 20px; height: 1px;
    background: var(--primary);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 3.5vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-highlight);
    line-height: 1.15;
    margin-bottom: var(--space-sm);
}

.section-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 640px;
    line-height: 1.75;
}

/* ── Glass Cards ── */
.glass-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius-lg);
    padding: var(--space-lg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.2), transparent);
}

.glass-card:hover {
    border-color: var(--border-active);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow), var(--shadow-card);
}

/* Card Grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--space-md);
}

.card-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.card-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

/* Card Icon */
.card-icon {
    width: 52px; height: 52px;
    border-radius: var(--border-radius-md);
    background: var(--gradient-glow);
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    font-size: 1.4rem;
    color: var(--primary);
}

.card-icon.accent {
    background: linear-gradient(135deg, rgba(123, 97, 255, 0.15), rgba(123, 97, 255, 0.05));
    color: var(--accent);
}

.card-icon.secondary {
    background: linear-gradient(135deg, rgba(0, 255, 200, 0.15), rgba(0, 255, 200, 0.05));
    color: var(--secondary);
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-highlight);
    margin-bottom: var(--space-xs);
}

.card-text {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ── Stats / Metrics ── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
}

.stat-item {
    text-align: center;
    padding: var(--space-lg);
    background: var(--gradient-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
}

.stat-item:hover {
    border-color: var(--border-active);
    box-shadow: var(--shadow-glow);
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2.8rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    margin-bottom: 0.3rem;
}

.stat-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

/* ── Timeline ── */
.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px; top: 0; bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary), var(--accent), transparent);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-xl);
    padding-left: var(--space-md);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -36px; top: 8px;
    width: 14px; height: 14px;
    border-radius: 50%;
    background: var(--bg-deep);
    border: 2px solid var(--primary);
    box-shadow: 0 0 12px var(--primary-glow);
}

.timeline-year {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 0.1em;
    margin-bottom: 0.3rem;
}

.timeline-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-highlight);
    margin-bottom: 0.3rem;
}

.timeline-org {
    font-size: 0.9rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.timeline-desc {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ── CTA Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-body);
    font-size: 0.88rem;
    font-weight: 600;
    padding: 0.8rem 1.8rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-accent);
    color: #fff;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.35);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--border-active);
}

.btn-outline:hover {
    background: var(--primary-subtle);
    color: #fff;
    border-color: var(--primary);
}

.btn-group {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

/* ── Dividers ── */
.section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-subtle), transparent);
    max-width: var(--container-max);
    margin: 0 auto;
}

/* ── Content Blocks ── */
.content-block {
    font-size: 1.02rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 780px;
}

.content-block p { margin-bottom: var(--space-md); }

.content-block strong { color: var(--text-highlight); }

.highlight-text {
    color: var(--primary);
    font-weight: 600;
}

/* ── Image Treatment ── */
.image-container {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-glass);
}

.image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    transition: transform var(--transition-slow);
}

.image-container:hover img {
    transform: scale(1.03);
}

.image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(3, 7, 15, 0.7) 100%);
    pointer-events: none;
}

/* ── Footer ── */
.footer {
    position: relative;
    z-index: 10;
    padding: var(--space-xl) var(--space-lg) var(--space-lg);
    border-top: 1px solid var(--border-subtle);
    background: rgba(3, 7, 15, 0.9);
    backdrop-filter: blur(12px);
}

.footer-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    text-align: center;
}

.footer-brand {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-highlight);
}

.footer-credit {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

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

.footer-social {
    display: flex;
    gap: var(--space-sm);
}

.footer-social a {
    width: 40px; height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--primary-subtle);
    transform: translateY(-2px);
}

.footer-contact {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.footer-contact a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

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

@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.92); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

@keyframes glowPulse {
    0% { opacity: 0.5; transform: scale(0.95); }
    100% { opacity: 1; transform: scale(1.05); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

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

/* Scroll Reveal */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-smooth), transform 0.8s var(--ease-smooth);
}

.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; }

/* ── Process / Flow Diagram ── */
.process-flow {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    overflow-x: auto;
    padding: var(--space-md) 0;
}

.process-node {
    flex-shrink: 0;
    padding: var(--space-md) var(--space-lg);
    background: var(--gradient-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius-md);
    text-align: center;
    min-width: 180px;
    transition: all var(--transition-base);
}

.process-node:hover {
    border-color: var(--border-active);
    box-shadow: var(--shadow-glow);
}

.process-connector {
    flex-shrink: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    position: relative;
}

.process-connector::after {
    content: '→';
    position: absolute;
    right: -6px; top: -10px;
    color: var(--primary);
    font-size: 0.9rem;
}

/* ── Tabs ── */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: var(--space-xs);
    flex-wrap: wrap;
}

.tab-btn {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: none;
    border: none;
    padding: 0.6rem 1.2rem;
    cursor: pointer;
    border-radius: var(--border-radius-sm) var(--border-radius-sm) 0 0;
    transition: all var(--transition-fast);
}

.tab-btn:hover { color: var(--primary); }

.tab-btn.active {
    color: var(--primary);
    background: var(--primary-subtle);
    border-bottom: 2px solid var(--primary);
}

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ── Quote Block ── */
.quote-block {
    position: relative;
    padding: var(--space-lg);
    padding-left: var(--space-xl);
    background: var(--gradient-card);
    border-left: 3px solid var(--primary);
    border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
    margin: var(--space-lg) 0;
}

.quote-block::before {
    content: '"';
    position: absolute;
    top: 10px; left: 16px;
    font-family: var(--font-display);
    font-size: 3rem;
    color: var(--primary);
    opacity: 0.3;
    line-height: 1;
}

.quote-text {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-primary);
    line-height: 1.7;
}

/* ── Tech Spec List ── */
.spec-list {
    list-style: none;
}

.spec-list li {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border-glass);
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.spec-list li::before {
    content: '▹';
    color: var(--primary);
    font-weight: 600;
    flex-shrink: 0;
    margin-top: 2px;
}

/* ── Page-specific hero variant ── */
.hero-compact {
    min-height: 60vh;
    padding: var(--space-2xl) var(--space-lg);
}

.hero-compact .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    max-width: 800px;
}

.hero-compact .hero-subtitle { margin-left: auto; margin-right: auto; }

/* Full-width hero image band */
.hero-banner {
    position: relative;
    height: 400px;
    overflow: hidden;
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--space-xl);
}

.hero-banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}

.hero-banner .image-overlay {
    background: linear-gradient(180deg, rgba(3,7,15,0.2) 0%, rgba(3,7,15,0.8) 100%);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
    .hero-inner { grid-template-columns: 1fr; text-align: center; }
    .hero-subtitle { margin-left: auto; margin-right: auto; }
    .hero-image-wrapper { justify-content: center; }
    .card-grid-3 { grid-template-columns: 1fr 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .data-tag { display: none; }
}

@media (max-width: 768px) {
    :root {
        --space-lg: 1.5rem;
        --space-xl: 2.5rem;
        --space-2xl: 3.5rem;
        --space-3xl: 4.5rem;
    }

    .nav-links { 
        display: none;
        position: fixed;
        top: var(--nav-height);
        left: 0; right: 0;
        background: rgba(3, 7, 15, 0.98);
        backdrop-filter: var(--glass-blur);
        flex-direction: column;
        padding: var(--space-md);
        border-bottom: 1px solid var(--border-subtle);
    }

    .nav-links.open { display: flex; }

    .nav-toggle { display: flex; }

    .hero { min-height: 80vh; }
    .hero-image-frame { width: 280px; height: 340px; }

    .card-grid, .card-grid-3, .card-grid-2 {
        grid-template-columns: 1fr;
    }

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

    .process-flow { flex-direction: column; }
    .process-connector { width: 2px; height: 30px; }
    .process-connector::after { right: -14px; top: 4px; transform: rotate(90deg); }

    .hero-banner { height: 260px; }

    .section-title { font-size: 1.8rem; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .hero-image-frame { width: 240px; height: 300px; }
    .btn-group { flex-direction: column; }
    .footer-social { flex-wrap: wrap; justify-content: center; }
}

/* ── Password Gate Styles ── */
.gate-container {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-deep);
    z-index: 9999;
    overflow: hidden;
}

.gate-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.gate-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 600px 600px at 30% 30%, rgba(0, 212, 255, 0.06), transparent),
        radial-gradient(ellipse 500px 500px at 70% 70%, rgba(123, 97, 255, 0.05), transparent);
    animation: neuralPulse 8s ease-in-out infinite alternate;
}

.gate-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.02) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridScroll 25s linear infinite;
}

.gate-card {
    position: relative;
    z-index: 2;
    background: var(--gradient-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius-xl);
    padding: var(--space-xl);
    width: 90%;
    max-width: 440px;
    backdrop-filter: blur(24px);
    box-shadow: var(--shadow-elevated);
    text-align: center;
}

.gate-icon {
    width: 72px; height: 72px;
    margin: 0 auto var(--space-lg);
    border-radius: 50%;
    background: var(--gradient-glow);
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--primary);
    animation: logoPulse 3s ease-in-out infinite;
}

.gate-title {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-highlight);
    margin-bottom: 0.4rem;
}

.gate-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.gate-input-group {
    position: relative;
    margin-bottom: var(--space-md);
}

.gate-input {
    width: 100%;
    padding: 0.9rem 1.2rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    letter-spacing: 0.15em;
    text-align: center;
    outline: none;
    transition: all var(--transition-fast);
}

.gate-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
}

.gate-input.error {
    border-color: #ff3366;
    box-shadow: 0 0 20px rgba(255, 51, 102, 0.2);
    animation: glitchShake 0.5s ease;
}

.gate-btn {
    width: 100%;
    padding: 0.9rem;
    background: var(--gradient-accent);
    border: none;
    border-radius: var(--border-radius-sm);
    color: #fff;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    letter-spacing: 0.05em;
}

.gate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.3);
}

.gate-error-msg {
    font-size: 0.78rem;
    color: #ff3366;
    margin-top: var(--space-xs);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.gate-error-msg.show { opacity: 1; }

.gate-status {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: var(--space-md);
    letter-spacing: 0.08em;
}

@keyframes glitchShake {
    0%, 100% { transform: translateX(0); }
    10% { transform: translateX(-8px); }
    20% { transform: translateX(8px); }
    30% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    50% { transform: translateX(-3px); }
    60% { transform: translateX(3px); }
}

/* Gate unlock transition */
.gate-container.unlocking {
    animation: gateUnlock 1.2s ease-in-out forwards;
}

@keyframes gateUnlock {
    0% { opacity: 1; filter: blur(0); transform: scale(1); }
    50% { opacity: 0.8; filter: blur(4px); transform: scale(1.02); }
    100% { opacity: 0; filter: blur(20px); transform: scale(1.1); }
}

/* ── Scanline effect ── */
.scanline {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 3px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    opacity: 0.3;
    animation: scanlineMove 4s linear infinite;
    pointer-events: none;
}

@keyframes scanlineMove {
    0% { top: 0; }
    100% { top: 100%; }
}

/* ── Infographic / Diagram helpers ── */
.info-diagram {
    background: var(--gradient-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    position: relative;
    overflow: hidden;
}

.info-diagram::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.3), transparent);
}

.diagram-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-highlight);
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.diagram-title i { color: var(--primary); }

/* ── Contact Form ── */
.contact-form {
    display: grid;
    gap: var(--space-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.form-group input,
.form-group textarea {
    padding: 0.8rem 1rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.92rem;
    outline: none;
    transition: all var(--transition-fast);
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

@media (max-width: 600px) {
    .form-row { grid-template-columns: 1fr; }
}