:root {
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-soft: #dbeafe;
    --border: #e2e8f0;
    --danger: #ef4444;
    --success: #10b981;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius: 12px;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes skeletonPulse {
    0% { background-color: #e2e8f0; }
    50% { background-color: #f1f5f9; }
    100% { background-color: #e2e8f0; }
}

.fade-in {
    animation: fadeIn 0.4s ease-out forwards;
}

/* Layout Elements */
.navbar {
    background-color: rgba(255, 255, 255, 0.8) !important;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--accent) !important;
}

.nav-link {
    font-weight: 500;
    color: var(--text-main) !important;
    padding: 0.5rem 1rem !important;
    transition: all 0.2s ease;
    border-radius: 8px;
}

.nav-link:hover {
    background-color: var(--accent-soft);
    color: var(--accent) !important;
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* Buttons */
.btn {
    padding: 0.6rem 1.5rem;
    font-weight: 600;
    border-radius: 10px;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--accent);
    border-color: var(--accent);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: scale(1.02);
}

/* Skeleton Screens */
.skeleton {
    animation: skeletonPulse 1.5s infinite;
    border-radius: 4px;
}

/* Custom UI */
.price-tag {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-main);
}

.feature-list li {
    display: flex;
    align-items: center;
    margin-bottom: 0.75rem;
    color: var(--text-muted);
}

.feature-list li i {
    color: var(--success);
    margin-right: 0.75rem;
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    .container { padding: 0 1.5rem; }
}