:root {
    --font-primary: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif;
    --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #ec4899 100%);
    
    /* Light Mode Variables */
    --bg-light: #f8fafc;
    --text-light: #334155;
    --glass-bg-light: rgba(255, 255, 255, 0.7);
    --glass-border-light: rgba(255, 255, 255, 0.5);
    --glass-shadow-light: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
    
    /* Dark Mode Variables */
    --bg-dark: #0f172a;
    --text-dark: #e2e8f0;
    --glass-bg-dark: rgba(15, 23, 42, 0.75);
    --glass-border-dark: rgba(255, 255, 255, 0.05);
    --glass-shadow-dark: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: var(--font-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-light);
    color: var(--text-light);
    transition: background-color 0.4s ease, color 0.4s ease;
}

main {
    flex: 1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 800;
    letter-spacing: -0.025em;
}

a {
    transition: var(--transition-smooth);
    text-decoration: none;
}

/* Navbar with Glassmorphism */
.navbar {
    background: var(--primary-gradient) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-size: 1.3rem;
    font-weight: 800;
    letter-spacing: 0.5px;
}

/* Glassmorphism Cards */
.card, .download-card, .tool-card {
    background: var(--glass-bg-light);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border-light);
    box-shadow: var(--glass-shadow-light);
    border-radius: 1rem;
    transition: var(--transition-smooth);
}

/* Tool Card Hover Effects (Micro-animations) */
.tool-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(79, 70, 229, 0.15) !important;
    border-color: rgba(79, 70, 229, 0.3);
}

.tool-card i {
    transition: var(--transition-smooth);
    display: inline-block;
}
.tool-card:hover i {
    transform: scale(1.1) rotate(5deg);
}

/* Dynamic Buttons */
.btn-primary {
    background: var(--primary-gradient);
    border: none;
    font-weight: 600;
    letter-spacing: 0.5px;
    border-radius: 0.5rem;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(236, 72, 153, 0.5);
    background: linear-gradient(135deg, #ec4899 0%, #4f46e5 100%);
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border: none;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}
.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.6);
}

.btn-info {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    border: none;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}
.btn-info:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.6);
}

/* Hero Section Animation */
.hero-section {
    padding: 3rem 0;
    animation: fadeInDown 0.8s ease-out forwards;
    opacity: 0;
}

.hero-section h1 {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

/* Input Fields */
.form-control, .input-group-text {
    border-radius: 0.5rem;
    border: 1px solid rgba(0,0,0,0.1);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}
.form-control:focus {
    box-shadow: 0 0 0 0.25rem rgba(79, 70, 229, 0.25);
    border-color: #4f46e5;
}

/* Ad Placeholders */
.ad-placeholder {
    background: rgba(0,0,0,0.02);
    border: 1px dashed rgba(0,0,0,0.1);
    border-radius: 0.75rem;
    padding: 1rem;
    min-height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.ad-header { min-height: 60px; border-radius: 0; border: none; border-bottom: 1px dashed rgba(0,0,0,0.1); }
.ad-sidebar { min-height: 250px; }
.ad-in-content { min-height: 120px; }
.ad-social-bar {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    z-index: 1000;
    pointer-events: none;
}
.ad-social-bar > * { pointer-events: auto; }

/* Misc Elements */
#previewSection img {
    max-height: 200px;
    object-fit: cover;
    border-radius: 0.75rem;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.progress {
    border-radius: 1rem;
    background-color: rgba(79, 70, 229, 0.1);
    height: 10px !important;
}
.progress-bar {
    background: var(--primary-gradient);
}

/* Dark Mode Overrides */
[data-bs-theme="dark"] body {
    background-color: var(--bg-dark);
    color: var(--text-dark);
}

[data-bs-theme="dark"] .card, 
[data-bs-theme="dark"] .download-card,
[data-bs-theme="dark"] .tool-card {
    background: var(--glass-bg-dark);
    border-color: var(--glass-border-dark);
    box-shadow: var(--glass-shadow-dark);
}

[data-bs-theme="dark"] .text-muted {
    color: #94a3b8 !important;
}

[data-bs-theme="dark"] .navbar {
    background: rgba(15, 23, 42, 0.85) !important;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

[data-bs-theme="dark"] .hero-section h1 {
    background: linear-gradient(135deg, #818cf8 0%, #f472b6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

[data-bs-theme="dark"] .ad-placeholder {
    background: rgba(255, 255, 255, 0.02);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-bs-theme="dark"] .form-control,
[data-bs-theme="dark"] .input-group-text {
    background-color: rgba(0,0,0,0.2);
    border-color: rgba(255,255,255,0.1);
    color: var(--text-dark);
}

[data-bs-theme="dark"] .accordion-button {
    background-color: var(--glass-bg-dark);
    color: var(--text-dark);
}
[data-bs-theme="dark"] .accordion-item {
    background-color: transparent;
    border-color: rgba(255,255,255,0.1);
}

[data-bs-theme="dark"] .site-footer {
    background-color: #0b1120 !important;
    border-top: 1px solid rgba(255,255,255,0.05) !important;
}

/* Keyframes */
@keyframes fadeInDown {
    0% { opacity: 0; transform: translateY(-30px); }
    100% { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    .hero-section h1 { font-size: 2.2rem; }
    .ad-sidebar { min-height: 100px; }
    .input-group-lg .btn { font-size: 1rem; }
}

/* Platform Icon Colors */
.platform-icon-youtube { color: #FF0000; }
.platform-icon-instagram { color: #E4405F; }
.platform-icon-tiktok { color: #000000; }
.platform-icon-snackvideo { color: #FF6B00; }
.platform-icon-snapchat { color: #FFFC00; }
.platform-icon-facebook { color: #1877F2; }
.platform-icon-twitter { color: #000000; }
.platform-icon-all { color: #6f42c1; }

[data-bs-theme="dark"] .platform-icon-tiktok,
[data-bs-theme="dark"] .platform-icon-twitter {
    color: #ffffff !important;
}