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

:root {
    /* Light Mode Variables */
    --bg-color: #f8f9fa;
    --text-color: #212529;
    --card-bg: #ffffff;
    --primary-color: #6366f1;
    --secondary-color: #a855f7;
    --nav-bg: rgba(255, 255, 255, 0.85);
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --gradient-btn: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --gradient-hover: linear-gradient(135deg, #4f46e5, #9333ea);
    
    --success-color: #10b981;
    --danger-color: #ef4444;
}

[data-theme="dark"] {
    /* Dark Mode Variables */
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --card-bg: #1e293b;
    --nav-bg: rgba(15, 23, 42, 0.85);
    --border-color: #334155;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--text-color);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--secondary-color);
}

/* Navbar */
.navbar {
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.5rem;
    background: var(--gradient-btn);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: opacity 0.2s ease;
}

.navbar-brand:hover {
    opacity: 0.8;
}

.nav-link {
    color: var(--text-color) !important;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

/* Cards */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-title {
    font-weight: 600;
}

/* Buttons */
.btn-gradient {
    background: var(--gradient-btn);
    color: white;
    border: none;
    border-radius: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    transition: background 0.3s ease, transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: var(--shadow-md);
}

.btn-gradient:hover {
    background: var(--gradient-hover);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-gradient:active {
    transform: translateY(0);
}

/* Inputs */
.form-control, .form-select {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.3s ease, color 0.3s ease;
}

.form-control:focus, .form-select:focus {
    background-color: var(--card-bg);
    color: var(--text-color);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(99, 102, 241, 0.25);
}

/* Theme Toggle Button */
.theme-toggle-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
    background-color: var(--border-color);
}

/* Utility */
.main-content {
    flex: 1 0 auto;
    padding-top: 5rem; /* Space for sticky navbar */
    padding-bottom: 3rem;
}

.footer {
    flex-shrink: 0;
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: auto;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

/* Loader Animation */
.loader-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99,102,241,0.1) 0%, rgba(255,255,255,0) 50%);
    z-index: -1;
    pointer-events: none;
}

[data-theme="dark"] .hero-section::before {
    background: radial-gradient(circle, rgba(99,102,241,0.15) 0%, rgba(15,23,42,0) 50%);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: var(--gradient-btn);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-color);
    opacity: 0.8;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Icon Wrappers */
.icon-wrapper {
    width: 60px;
    height: 60px;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: white;
}

.bg-instagram { background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%); }
.bg-youtube { background-color: #ff0000; }
.bg-facebook { background-color: #1877f2; }
.bg-twitter { background-color: #000000; }
[data-theme="dark"] .bg-twitter { background-color: #ffffff; color: #000000; }
.bg-ai-1 { background: linear-gradient(135deg, #0ea5e9, #38bdf8); }
.bg-ai-2 { background: linear-gradient(135deg, #10b981, #34d399); }
.bg-ai-3 { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.bg-ai-4 { background: linear-gradient(135deg, #8b5cf6, #a78bfa); }