/* 
    GURU AI & RESEARCH LAB - DESIGN SYSTEM
    A sophisticated, dark-themed design for advanced IT & AI solutions.
*/

:root {
    /* Colors */
    --bg-main: #020205;
    --bg-card: rgba(15, 15, 25, 0.7);
    --accent-blue: #00f2ff;
    --accent-cyan: #00d1ff;
    --accent-purple: #7000ff;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --glass-border: rgba(255, 255, 255, 0.1);
    --nav-height: 80px;
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

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

h1, h2, h3, h4, .brand {
    font-family: var(--font-heading);
    letter-spacing: -0.02em;
}

/* Glassmorphism Utility */
.glass {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
}

/* Layout Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
    box-shadow: 0 0 20px rgba(0, 242, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 242, 255, 0.5);
}

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

.btn-outline:hover {
    background: rgba(0, 242, 255, 0.1);
    transform: translateY(-2px);
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
}

nav.scrolled {
    background: rgba(2, 2, 5, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 4px;
    color: var(--text-primary);
}

.logo span {
    color: var(--accent-blue);
}

.nav-links {
    display: flex;
    gap: 40px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-blue);
    box-shadow: 0 0 10px var(--accent-blue);
}

.nav-links a {
    position: relative;
}

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    font-size: 24px;
    color: white;
    cursor: pointer;
    z-index: 1001;
}

/* Hero Section */
#hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.5;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent, var(--bg-main) 90%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-tagline {
    color: var(--accent-blue);
    text-transform: uppercase;
    letter-spacing: 4px;
    font-weight: 600;
    margin-bottom: 16px;
    display: block;
}

h1 {
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 24px;
}

h1 span {
    background: linear-gradient(to right, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.service-card {
    padding: 40px;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-blue);
    box-shadow: 0 10px 30px rgba(0, 242, 255, 0.1);
}

.service-card i {
    font-size: 40px;
    color: var(--accent-blue);
    margin-bottom: 24px;
    display: block;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.service-card ul {
    list-style: none;
    margin-top: 20px;
}

.service-card li {
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.service-card li::before {
    content: '→';
    color: var(--accent-blue);
}

/* Feature Section */
.feature-row {
    display: flex;
    align-items: center;
    gap: 60px;
    margin-bottom: 100px;
}

.feature-row.reverse {
    flex-direction: row-reverse;
}

.feature-image {
    flex: 1;
    border-radius: 20px;
    overflow: hidden;
    position: relative;
}

.feature-image img {
    width: 100%;
    display: block;
    transition: transform 0.5s ease;
}

.feature-image:hover img {
    transform: scale(1.05);
}

.feature-content {
    flex: 1;
}

.feature-content h2 {
    font-size: 2.5rem;
    margin-bottom: 24px;
}

/* Form */
.contact-container {
    max-width: 800px;
    margin: 0 auto;
}

.contact-form {
    padding: 50px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: white;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-blue);
    background: rgba(255, 255, 255, 0.1);
}

textarea.form-control {
    height: 150px;
    resize: none;
}

/* Footer */
footer {
    padding: 80px 0 40px;
    border-top: 1px solid var(--glass-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
}

.footer-brand .logo {
    margin-bottom: 20px;
    display: block;
}

.footer-brand p {
    color: var(--text-secondary);
}

.footer-links h4 {
    margin-bottom: 24px;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.9rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    text-decoration: none;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

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

.footer-bottom {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Metrics Bar */
.metrics-bar {
    background: rgba(0, 242, 255, 0.05);
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
    padding: 15px 0;
    overflow: hidden;
    white-space: nowrap;
}

.metrics-track {
    display: inline-block;
    animation: scrollMetrics 30s linear infinite;
}

.metric-item {
    display: inline-block;
    margin-right: 60px;
    font-size: 0.85rem;
    font-family: var(--font-heading);
    color: var(--text-secondary);
}

.metric-item span {
    color: var(--accent-blue);
    font-weight: 700;
    margin-left: 8px;
}

@keyframes scrollMetrics {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* Research Cards */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.research-card {
    position: relative;
    overflow: hidden;
    height: 400px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--glass-border);
}

.research-card img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
    filter: brightness(0.4) grayscale(0.5);
    transition: all 0.5s ease;
}

.research-card:hover img {
    filter: brightness(0.6) grayscale(0);
    transform: scale(1.05);
}

.research-card .category {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent-blue);
    margin-bottom: 10px;
}

.research-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

/* Subpage Hero */
.subpage-hero {
    padding: 160px 0 80px;
    background: radial-gradient(circle at top right, rgba(0, 242, 255, 0.1), transparent 40%);
    text-align: center;
}

.subpage-hero h1 {
    font-size: 4rem;
    margin-bottom: 20px;
}

/* Tab System */
.tab-container {
    margin-top: 50px;
}

.tab-nav {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 50px;
}

.tab-btn {
    padding: 12px 24px;
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: var(--accent-blue);
    color: var(--bg-main);
    border-color: var(--accent-blue);
}

/* Chat Widget */
.chat-widget {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 2000;
}

.chat-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--accent-blue);
    color: var(--primary-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(0, 242, 255, 0.3);
    border: none;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.chat-btn:hover {
    transform: scale(1.1);
}

.chat-window {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 350px;
    height: 450px;
    background: rgba(2, 2, 5, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.chat-window.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.chat-header {
    background: var(--glass-bg);
    padding: 20px;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.chat-header h4 { margin: 0; font-family: 'Outfit', sans-serif; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #00ff88; box-shadow: 0 0 10px #00ff88; }

.chat-body {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.chat-msg {
    padding: 12px 16px;
    border-radius: 15px;
    font-size: 0.9rem;
    max-width: 80%;
}

.chat-msg.bot { background: var(--glass-bg); align-self: flex-start; border: 1px solid var(--glass-border); }
.chat-msg.user { background: var(--accent-blue); color: var(--primary-bg); align-self: flex-end; }

.chat-input {
    padding: 15px;
    border-top: 1px solid var(--glass-border);
    display: flex;
    gap: 10px;
}

.chat-input input {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 8px 12px;
    color: white;
}

/* Inventory Bars */
.inventory-container {
    margin-top: 40px;
}

.inventory-item {
    margin-bottom: 20px;
}

.inventory-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.inventory-track {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.inventory-fill {
    height: 100%;
    background: var(--accent-blue);
    box-shadow: 0 0 10px var(--accent-blue);
    width: 0;
    transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Status Page */
.status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.status-card {
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.status-label { display: flex; align-items: center; gap: 15px; }
.status-indicator { padding: 4px 12px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; text-transform: uppercase; }
.status-online { background: rgba(0, 255, 136, 0.1); color: #00ff88; border: 1px solid rgba(0, 255, 136, 0.2); }

@media (max-width: 768px) {
    .mobile-toggle { display: block; }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background: #020205;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 30px;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
        border-left: 1px solid var(--glass-border);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
    }

    .nav-links.active {
        right: 0;
    }

    /* Mobile Overlay */
    .nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.7);
        backdrop-filter: blur(4px);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 999;
    }

    .nav-overlay.active {
        opacity: 1;
        visibility: visible;
    }

    .nav-links a {
        font-size: 1.2rem;
    }

    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    .hero-description { font-size: 1rem; }
    .section { padding: 40px 0; }
    .footer-grid { grid-template-columns: 1fr; }
    .subpage-hero h1 { font-size: 2.2rem; }
    
    .feature-row { flex-direction: column; gap: 30px; }
    .feature-row.reverse { flex-direction: column; }
    
    /* Hide some elements on mobile to save space */
    .metrics-bar { display: none; }
    
    /* Bottom Nav Padding */
    body { padding-bottom: 70px; }
}

/* Sticky Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(15, 15, 25, 0.95);
    backdrop-filter: blur(10px);
    display: none;
    justify-content: space-around;
    align-items: center;
    border-top: 1px solid var(--glass-border);
    z-index: 1000;
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.7rem;
    gap: 5px;
    transition: all 0.3s ease;
}

.bottom-nav-item i {
    font-size: 1.2rem;
}

.bottom-nav-item.active {
    color: var(--accent-blue);
}

@media (max-width: 768px) {
    .bottom-nav {
        display: flex;
    }
}