/*
 * Blackboard Test Generator - Light Premium Redesign Styling
 * Clean Light Theme, Persistent Side-by-Side Layout, and SweetAlert2 Custom Styling
 */

/* Design Tokens & State Variables (Light Mode) */
:root {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --card-bg: #ffffff;
    --card-border: #e2e8f0;
    
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    
    --primary-blue: #006FBA;
    --primary-blue-gradient: linear-gradient(135deg, #006FBA, #002F6C);
    --primary-blue-glow: rgba(0, 111, 186, 0.25);
    
    --primary-orange: #ea580c;
    --primary-orange-gradient: linear-gradient(135deg, #f97316, #ea580c);
    --primary-orange-glow: rgba(234, 88, 12, 0.15);

    --primary-green: #10b981;
    --primary-red: #ef4444;

    /* Transition defaults */
    --accent-color: var(--primary-blue);
    --accent-gradient: var(--primary-blue-gradient);
    --accent-glow: var(--primary-blue-glow);
}

/* State-dependent styling */
body.state-generate {
    --accent-color: var(--primary-blue);
    --accent-gradient: var(--primary-blue-gradient);
    --accent-glow: var(--primary-blue-glow);
}

body.state-download {
    --accent-color: var(--primary-orange);
    --accent-gradient: var(--primary-orange-gradient);
    --accent-glow: var(--primary-orange-glow);
}

/* Global Reset & Base Setup */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    position: relative;
    overflow-x: hidden;
    line-height: 1.5;
}

/* Ambient Glow Backgrounds */
.background-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 80% 15%, rgba(0, 111, 186, 0.07), transparent 45%),
        radial-gradient(circle at 20% 85%, rgba(0, 47, 108, 0.04), transparent 50%);
    z-index: -1;
    pointer-events: none;
}

/* Layout Wrapper */
.app-wrapper {
    width: 100%;
    max-width: 1280px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Header Component */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.25rem;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: white;
    box-shadow: 0 4px 10px var(--accent-glow);
    transition: background 0.5s ease, box-shadow 0.5s ease;
}

.logo-text h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.logo-text span {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

/* Buttons System */
.btn {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    border: 1px solid transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    color: white;
}

.btn-primary {
    background: var(--accent-gradient);
    box-shadow: 0 4px 10px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 15px var(--accent-glow);
}

.btn-secondary {
    background: #ffffff;
    border-color: #cbd5e1;
    color: var(--text-secondary);
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.btn-secondary:hover {
    background: #f8fafc;
    border-color: #94a3b8;
    color: var(--text-primary);
}

.btn-large {
    font-size: 0.95rem;
    padding: 0.7rem 1.75rem;
    border-radius: 8px;
}

.btn-action {
    background: var(--accent-gradient);
    box-shadow: 0 4px 14px var(--accent-glow);
    min-width: 150px;
    transition: all 0.5s ease, transform 0.2s;
}

/* Info Banner */
.alert-banner {
    display: flex;
    gap: 0.75rem;
    background: #ffffff;
    border-left: 4px solid var(--accent-color);
    padding: 0.85rem 1.25rem;
    border-radius: 10px;
    border-top: 1px solid var(--card-border);
    border-right: 1px solid var(--card-border);
    border-bottom: 1px solid var(--card-border);
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
    transition: border-left-color 0.5s ease;
}

.banner-icon {
    font-size: 1.25rem;
    color: var(--accent-color);
    transition: color 0.5s ease;
}

.banner-body h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 0.92rem;
    font-weight: 600;
    margin-bottom: 0.15rem;
}

.banner-body p {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

/* Workspace Layout Grid - Always 2 columns and side-by-side */
.workspace-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 800px) {
    .workspace-grid {
        grid-template-columns: 1fr;
    }
}

/* Cards system */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: border-color 0.3s;
}

.card:hover {
    border-color: #cbd5e1;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.75rem 1rem;
    background: #f8fafc;
    border-bottom: 1px solid var(--card-border);
}

.step-badge {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: #ffffff;
    border: 1.5px solid var(--accent-color);
    color: var(--accent-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.75rem;
    font-family: 'Outfit', sans-serif;
    transition: border-color 0.5s ease, color 0.5s ease;
}

.card-header h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
}

.card-body {
    flex-grow: 1;
}

/* Premium Light Code Textareas - Height reduced to fit single screen */
.card-body textarea {
    width: 100%;
    height: 270px;
    border: none;
    background: #ffffff;
    color: var(--text-primary);
    padding: 1rem;
    font-family: 'Fira Code', 'Courier New', Courier, monospace;
    font-size: 0.88rem;
    line-height: 1.55;
    resize: none;
    outline: none;
    display: block;
    transition: box-shadow 0.3s;
}

.card-body textarea.instructions {
    color: var(--text-muted);
    font-style: italic;
}

.card-body textarea:focus {
    box-shadow: inset 0 0 0 1.5px var(--accent-color);
}

/* Actions Panel */
.actions-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 0.85rem 1.25rem;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

/* Bank Name Input Field */
.bank-name-field {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.bank-name-field label {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.bank-name-field input {
    padding: 0.55rem 1rem;
    font-size: 0.88rem;
    font-family: 'Inter', sans-serif;
    border-radius: 8px;
    border: 1px solid var(--card-border);
    background: #ffffff;
    color: var(--text-primary);
    outline: none;
    transition: all 0.2s;
    box-shadow: 0 1px 2px rgba(0,0,0,0.02);
    min-width: 220px;
}

.bank-name-field input:hover {
    border-color: #cbd5e1;
}

.bank-name-field input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Format Selector */
.format-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.format-selector label {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.select-wrapper {
    position: relative;
    min-width: 260px;
}

.select-wrapper select {
    width: 100%;
    padding: 0.55rem 1rem;
    padding-right: 2rem;
    font-size: 0.88rem;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    border-radius: 8px;
    border: 1px solid var(--card-border);
    background: #ffffff;
    color: var(--text-primary);
    cursor: pointer;
    outline: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    transition: all 0.2s;
    box-shadow: 0 1px 2px rgba(0,0,0,0.02);
}

.select-wrapper select:hover {
    border-color: #cbd5e1;
}

.select-wrapper select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.select-chevron {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.select-wrapper:hover .select-chevron {
    color: var(--text-primary);
}

/* Footer Component */
.app-footer {
    text-align: center;
    padding: 0.5rem;
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* --- SweetAlert2 Light Premium Overrides --- */
.premium-swal-popup {
    border-radius: 16px !important;
    border: 1px solid var(--card-border) !important;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08) !important;
    font-family: 'Inter', sans-serif !important;
}

.premium-swal-title {
    font-family: 'Outfit', sans-serif !important;
    font-weight: 700 !important;
    font-size: 1.3rem !important;
    color: var(--text-primary) !important;
}

.premium-swal-confirm-btn {
    font-family: 'Inter', sans-serif !important;
    font-weight: 600 !important;
    padding: 0.6rem 1.5rem !important;
    border-radius: 8px !important;
    background: linear-gradient(135deg, #006FBA, #002F6C) !important;
    color: white !important;
    border: none !important;
    box-shadow: 0 4px 10px rgba(0, 111, 186, 0.25) !important;
    transition: transform 0.1s, box-shadow 0.2s !important;
}

.premium-swal-confirm-btn:active {
    transform: scale(0.97) !important;
}

.awesome-swal-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 14px rgba(0, 111, 186, 0.3) !important;
}

/* --- Navigation Tabs --- */
.app-tabs {
    display: flex;
    gap: 0.5rem;
    padding: 0.25rem;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
}

.tab-link {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: 'Outfit', sans-serif;
    font-size: 0.88rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-link i {
    font-size: 0.95rem;
}

.tab-link:hover {
    background: #f1f5f9;
    color: var(--text-primary);
}

.tab-link.active {
    background: var(--primary-blue-gradient);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 111, 186, 0.2);
}

/* --- Dropzone styles --- */
.dropzone-area {
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--primary-blue);
    border-radius: 10px;
    padding: 1.75rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    background: rgba(0, 111, 186, 0.01);
    min-height: 180px;
}

.dropzone-area:hover, .dropzone-area.dragover {
    border-color: #002F6C;
    background: rgba(0, 111, 186, 0.05);
    transform: scale(1.01);
}

.dropzone-icon {
    transition: transform 0.2s ease;
}

.dropzone-area:hover .dropzone-icon, .dropzone-area.dragover .dropzone-icon {
    transform: translateY(-3px);
}

/* --- Metadata inputs focus --- */
.metadata-form-grid input:focus {
    border-color: var(--primary-blue) !important;
    box-shadow: 0 0 0 3px rgba(0, 111, 186, 0.15) !important;
}