/* ===================================
   GLOBAL STYLES & VARIABLES
   =================================== */

:root {
    /* Colors - Cyan/Teal Theme */
    --primary-cyan: #00d9ff;
    --secondary-cyan: #00b8d4;
    --accent-cyan: #18ffff;
    --dark-blue: #0a1628;
    --dark-navy: #0d1b2a;
    --darker-bg: #050d18;
    --text-white: #ffffff;
    --text-gray: #b0c4de;
    --text-muted: #6b7b8c;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #00d9ff 0%, #00b8d4 100%);
    --gradient-dark: linear-gradient(180deg, #0a1628 0%, #050d18 100%);
    --gradient-glow: radial-gradient(circle, rgba(0, 217, 255, 0.3) 0%, transparent 70%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Typography */
    --font-primary: 'Rajdhani', 'Orbitron', sans-serif;
    --font-secondary: 'Roboto', 'Arial', sans-serif;
    
    /* Effects */
    --shadow-glow: 0 0 20px rgba(0, 217, 255, 0.5);
    --shadow-strong: 0 0 30px rgba(0, 217, 255, 0.7);
    --transition-fast: 0.3s ease;
    --transition-medium: 0.5s ease;
}

/* ===================================
   RESET & BASE STYLES
   =================================== */

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

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

body {
    font-family: var(--font-secondary);
    background: var(--gradient-dark);
    color: var(--text-white);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ===================================
   TYPOGRAPHY
   =================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
}

h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    line-height: 1.1;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.2;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--text-gray);
}

.highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 10px rgba(0, 217, 255, 0.5));
}

/* ===================================
   LAYOUT UTILITIES
   =================================== */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 100px;
    height: 3px;
    background: var(--gradient-primary);
    margin: 1rem auto 0;
    box-shadow: var(--shadow-glow);
}

/* ===================================
   NAVIGATION
   =================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 2px solid rgba(0, 217, 255, 0.3);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo-icon {
    width: 65px;
    height: 65px;
    background: transparent;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: none;
    animation: none;
    padding: 5px;
}

.brain-icon {
    font-size: 1.5rem;
}

.logo-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.logo-text {
    font-family: var(--font-primary);
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 1px;
    line-height: 1.2;
    color: var(--text-white);
}

.logo-subtitle {
    font-size: 0.7rem;
    color: var(--primary-cyan);
}

.nav-menu {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-link {
    color: var(--text-gray);
    text-decoration: none;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 1px;
    position: relative;
    transition: var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-cyan);
}

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

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 28px;
    height: 3px;
    background: var(--primary-cyan);
    transition: var(--transition-fast);
    border-radius: 2px;
}

/* ===================================
   BUTTONS
   =================================== */

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-decoration: none;
    text-transform: uppercase;
    border: 2px solid var(--primary-cyan);
    border-radius: 0;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    transition: var(--transition-medium);
    z-index: -1;
}

.btn:hover::before {
    left: 0;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--dark-navy);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    box-shadow: var(--shadow-strong);
    transform: translateY(-3px);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-cyan);
}

.btn-secondary:hover {
    background: var(--gradient-primary);
    color: var(--dark-navy);
    box-shadow: var(--shadow-glow);
}

.btn-large {
    padding: 1.25rem 3rem;
    font-size: 1.125rem;
}

/* ===================================
   FOOTER
   =================================== */

.footer {
    background: var(--darker-bg);
    border-top: 2px solid rgba(0, 217, 255, 0.3);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.footer-brand p {
    color: var(--text-muted);
    margin-top: 1rem;
    font-style: italic;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-column h4 {
    color: var(--primary-cyan);
    margin-bottom: 1rem;
    font-size: 1rem;
}

.footer-column a {
    display: block;
    color: var(--text-gray);
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: var(--transition-fast);
}

.footer-column a:hover {
    color: var(--primary-cyan);
    padding-left: 5px;
}

/* Social Links */
.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(0, 217, 255, 0.1);
    color: var(--primary-cyan);
    text-decoration: none;
    transition: var(--transition-fast);
    border: 1px solid rgba(0, 217, 255, 0.3);
}

.social-icon:hover {
    background: var(--primary-cyan);
    color: var(--dark-bg);
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 5px 20px rgba(0, 217, 255, 0.5);
}

.social-icon i {
    font-size: 1.1rem;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(0, 217, 255, 0.2);
    color: var(--text-muted);
}

/* ===================================
   ANIMATIONS
   =================================== */

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 20px rgba(0, 217, 255, 0.5);
    }
    50% {
        box-shadow: 0 0 30px rgba(0, 217, 255, 0.8);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

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

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background: rgba(10, 22, 40, 0.98);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
        gap: 1.5rem;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

/* ===================================
   FONT AWESOME ICON ANIMATIONS
   =================================== */

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes iconFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Icon Utilities */
.icon-cyan {
    color: var(--primary-cyan);
}

.icon-glow {
    filter: drop-shadow(0 0 10px rgba(0, 217, 255, 0.5));
}

.icon-gradient {
    background: linear-gradient(135deg, var(--primary-cyan), var(--secondary-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}