/* 
  Premium Design System - Multi-Tool Website
  Includes: Glassmorphism, 3D effects, Dark/Light Mode, Animations
*/

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Light Theme */
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --secondary: #ec4899;
    --accent: #8b5cf6;
    --bg-main: #f8fafc;
    --bg-card: rgba(255, 255, 255, 0.7);
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: rgba(226, 232, 240, 0.8);
    --glass-bg: rgba(255, 255, 255, 0.4);
    --glass-border: rgba(255, 255, 255, 0.6);
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --grad-primary: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
}

[data-theme="dark"] {
    --bg-main: #020617;
    --bg-card: rgba(30, 41, 59, 0.7);
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --border: rgba(51, 65, 85, 0.8);
    --glass-bg: rgba(15, 23, 42, 0.4);
    --glass-border: rgba(30, 41, 59, 0.6);
    --shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -6px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

h1, h2, h3, h4, .font-heading {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

/* Glassmorphism utility */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
}

/* 3D Card Hover */
.card-3d {
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s ease;
}

.card-3d:hover {
    transform: translateY(-10px) rotateX(2deg) rotateY(2deg);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

/* Layout */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

header {
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: background 0.3s;
}

header.scrolled {
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--glass-border);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--primary);
}

/* Buttons */
.btn {
    padding: 0.8rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.btn-primary {
    background: var(--grad-primary);
    color: white;
    box-shadow: 0 10px 15px -3px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 20px 25px -5px rgba(99, 102, 241, 0.5);
}

/* Hero Section */
.hero {
    padding: 8rem 0 5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-content h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 2.5rem;
}

.floating-shape {
    position: absolute;
    z-index: -1;
    filter: blur(60px);
    opacity: 0.5;
    animation: float 20s infinite alternate;
}

@keyframes float {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(100px, 100px) rotate(360deg); }
}

/* Grid & Cards */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    padding: 4rem 0;
}

.tool-card {
    padding: 2rem;
    border-radius: 24px;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: relative;
    overflow: hidden;
}

.tool-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: var(--grad-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

/* Toggle Switch */
.theme-toggle {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

/* Footer */
footer {
    background: var(--bg-card);
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--border);
    margin-top: 5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-links h4 {
    margin-bottom: 1.5rem;
}

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

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    text-decoration: none;
    color: var(--text-muted);
    transition: color 0.2s;
}

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

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
}