/**
 * Samir Manglam Portfolio - Main Stylesheet
 * Path: /assets/css/main.css
 */

/* =====================================================
   CSS Variables & Theme
   ===================================================== */
:root {
    /* Primary Colors */
    --primary: #00d4ff;
    --primary-dark: #00a8cc;
    --primary-light: #66e5ff;
    
    /* Secondary Colors */
    --secondary: #ff00ff;
    --secondary-dark: #cc00cc;
    --secondary-light: #ff66ff;
    
    /* Accent Colors */
    --accent: #00ff88;
    --accent-dark: #00cc6a;
    --accent-light: #66ffb3;
    
    /* Background Colors */
    --bg-dark: #0a0a0a;
    --bg-darker: #050505;
    --bg-light: #1a1a1a;
    --bg-lighter: #2a2a2a;
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #888888;
    --text-muted: #555555;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --gradient-dark: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
    --gradient-glow: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.15) 0%, transparent 70%);
    
    /* Shadows */
    --shadow-primary: 0 0 20px rgba(0, 212, 255, 0.3);
    --shadow-secondary: 0 0 20px rgba(255, 0, 255, 0.3);
    --shadow-accent: 0 0 20px rgba(0, 255, 136, 0.3);
    
    /* Typography */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --section-padding: 100px;
    --container-max: 1400px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

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

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

body.no-webgl {
    background: var(--bg-dark);
}

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

a:hover {
    color: var(--primary-light);
}

img {
    max-width: 100%;
    height: auto;
}

/* =====================================================
   Typography
   ===================================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

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

.text-primary { color: var(--primary) !important; }
.text-secondary { color: var(--secondary) !important; }
.text-accent { color: var(--accent) !important; }

/* =====================================================
   Layout
   ===================================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: var(--section-padding) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    margin-bottom: 15px;
}

.section-header p {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* =====================================================
   Grid System
   ===================================================== */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.col {
    flex: 1;
    padding: 0 15px;
}

.col-12 { flex: 0 0 100%; max-width: 100%; }
.col-6 { flex: 0 0 50%; max-width: 50%; }
.col-4 { flex: 0 0 33.333%; max-width: 33.333%; }
.col-3 { flex: 0 0 25%; max-width: 25%; }

@media (max-width: 768px) {
    .col-md-12 { flex: 0 0 100%; max-width: 100%; }
    .col-md-6 { flex: 0 0 50%; max-width: 50%; }
}

@media (max-width: 576px) {
    .col-sm-12 { flex: 0 0 100%; max-width: 100%; }
}

/* =====================================================
   Buttons
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 32px;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: var(--transition-slow);
}

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

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background: var(--primary);
    color: var(--bg-dark);
}

.btn-accent {
    background: var(--accent);
    color: var(--bg-dark);
    box-shadow: var(--shadow-accent);
}

.btn-accent:hover {
    background: var(--accent-light);
    transform: translateY(-3px);
}

/* =====================================================
   Cards
   ===================================================== */
.card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: var(--shadow-primary);
}

.card-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/10;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.card:hover .card-image img {
    transform: scale(1.1);
}

.card-content {
    padding: 25px;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.card-text {
    color: var(--text-secondary);
    margin-bottom: 15px;
}

/* =====================================================
   Navigation
   ===================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition-normal);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    padding: 15px 0;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.3);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    color: var(--text-primary);
    font-weight: 500;
    position: relative;
    padding: 5px 0;
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-dark);
        flex-direction: column;
        padding: 30px;
        gap: 20px;
        transform: translateX(-100%);
        transition: var(--transition-normal);
    }
    
    .nav-links.active {
        transform: translateX(0);
    }
}

/* =====================================================
   Hero Section
   ===================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 100px 0;
}

.hero-content {
    text-align: center;
    z-index: 10;
    max-width: 800px;
    padding: 0 20px;
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 20px;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 25px;
}

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

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 60px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-top: 10px;
}

/* =====================================================
   Tech Stack Section
   ===================================================== */
.tech-stack {
    padding: 80px 0;
    background: var(--bg-light);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    padding: 25px;
    background: var(--bg-lighter);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.tech-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: var(--shadow-primary);
}

.tech-item i {
    font-size: 2.5rem;
    color: var(--primary);
}

.tech-item span {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* =====================================================
   Footer
   ===================================================== */
.footer {
    background: var(--bg-darker);
    padding: 60px 0 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

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

.footer-brand p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 15px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: var(--transition-normal);
}

.footer-social a:hover {
    background: var(--primary);
    color: var(--bg-dark);
    transform: translateY(-3px);
}

.footer-links h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

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

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--text-secondary);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0;
}

/* =====================================================
   Utilities
   ===================================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.d-flex { display: flex; }
.d-block { display: block; }
.d-none { display: none; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }

.gap-10 { gap: 10px; }
.gap-20 { gap: 20px; }
.gap-30 { gap: 30px; }

.mb-10 { margin-bottom: 10px; }
.mb-20 { margin-bottom: 20px; }
.mb-30 { margin-bottom: 30px; }
.mb-40 { margin-bottom: 40px; }

.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.mt-30 { margin-top: 30px; }
.mt-40 { margin-top: 40px; }

/* =====================================================
   Animations
   ===================================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

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

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px rgba(0, 212, 255, 0.3); }
    50% { box-shadow: 0 0 40px rgba(0, 212, 255, 0.6); }
}

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

.animate-fadeIn { animation: fadeIn 0.5s ease forwards; }
.animate-fadeInUp { animation: fadeInUp 0.5s ease forwards; }
.animate-fadeInDown { animation: fadeInDown 0.5s ease forwards; }
.animate-pulse { animation: pulse 2s infinite; }
.animate-glow { animation: glow 2s infinite; }
.animate-float { animation: float 3s ease-in-out infinite; }

/* Animation delays */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }

/* =====================================================
   Scrollbar
   ===================================================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-lighter);
    border-radius: 4px;
}

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

/* =====================================================
   Selection
   ===================================================== */
::selection {
    background: var(--primary);
    color: var(--bg-dark);
}

/* =====================================================
   Loading Spinner
   ===================================================== */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--bg-lighter);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* =====================================================
   Alerts
   ===================================================== */
.alert {
    padding: 15px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid var(--accent);
    color: var(--accent);
}

.alert-error {
    background: rgba(255, 0, 0, 0.1);
    border: 1px solid #ff4444;
    color: #ff4444;
}

.alert-warning {
    background: rgba(255, 165, 0, 0.1);
    border: 1px solid orange;
    color: orange;
}

.alert-info {
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--primary);
    color: var(--primary);
}