/* Custom Styling for Keyword Download System */
:root {
    --primary-color: #0d6efd;
    --primary-hover: #0b5ed7;
    --dark-bg: #0f172a;
    --card-bg: #ffffff;
    --border-radius: 12px;
    --box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    min-height: 100vh;
    color: #334155;
}

/* App Navbar */
.navbar-brand {
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* Card Styling */
.main-card {
    background: var(--card-bg);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card-header-custom {
    background: linear-gradient(135deg, #0d6efd 0%, #1e40af 100%);
    color: white;
    border-top-left-radius: var(--border-radius) !important;
    border-top-right-radius: var(--border-radius) !important;
    padding: 1.5rem 2rem;
}

/* Form Controls */
.form-label {
    font-weight: 600;
    font-size: 0.9rem;
    color: #475569;
}

.form-control, .form-select {
    border-radius: 8px;
    padding: 0.75rem 1rem;
    border: 1.5px solid #cbd5e1;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(13, 110, 253, 0.15);
}

.btn-primary-custom {
    background: linear-gradient(135deg, #0d6efd 0%, #2563eb 100%);
    border: none;
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
    transition: all 0.2s ease;
}

.btn-primary-custom:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
}

.btn-primary-custom:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* Preview Frame */
.pdf-preview-container {
    width: 100%;
    height: 600px;
    border: 1px solid #cbd5e1;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.image-preview-container img {
    max-width: 100%;
    max-height: 500px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Badge & Table Improvements */
.table-custom {
    border-collapse: separate;
    border-spacing: 0;
}

.table-custom th {
    background-color: #f1f5f9;
    font-weight: 600;
    color: #475569;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    padding: 1rem;
}

.table-custom td {
    padding: 1rem;
    vertical-align: middle;
}