/* ============================================================================
   Exam Portal - Custom Stylesheet
   A clean, academic-inspired design with warm tones
   ============================================================================ */

/* --------------------------------------------------------------------------
   CSS Variables & Theme
   -------------------------------------------------------------------------- */
:root {
    /* Color Palette - Warm Academic */
    --color-bg: #faf8f5;
    --color-bg-alt: #f5f2ed;
    --color-surface: #ffffff;
    --color-border: #e5e0d8;
    --color-border-strong: #d4cdc2;
    
    /* Text Colors */
    --color-text: #2d2a26;
    --color-text-muted: #6b6560;
    --color-text-light: #9a948c;
    
    /* Accent Colors */
    --color-primary: #c45a3b;
    --color-primary-hover: #a84a2f;
    --color-primary-light: #f8ebe7;
    
    --color-secondary: #4a6741;
    --color-secondary-hover: #3d5636;
    --color-secondary-light: #e8efe6;
    
    --color-accent: #8b7355;
    
    /* Status Colors */
    --color-success: #4a7c59;
    --color-success-bg: #e8f5e9;
    --color-warning: #c49a3b;
    --color-warning-bg: #fff8e1;
    --color-error: #c45a5a;
    --color-error-bg: #fce8e8;
    --color-info: #5a7c9c;
    --color-info-bg: #e8f1f8;
    
    /* Typography */
    --font-sans: 'Crimson Pro', 'Georgia', serif;
    --font-display: 'Playfair Display', 'Georgia', serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(45, 42, 38, 0.08);
    --shadow-md: 0 4px 12px rgba(45, 42, 38, 0.1);
    --shadow-lg: 0 8px 24px rgba(45, 42, 38, 0.12);
}

/* --------------------------------------------------------------------------
   Google Fonts Import
   -------------------------------------------------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=Crimson+Pro:wght@400;500;600;700&family=Playfair+Display:wght@600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* --------------------------------------------------------------------------
   Base Styles
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    font-size: 1.0625rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(196, 90, 59, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(74, 103, 65, 0.03) 0%, transparent 50%);
    min-height: 100vh;
}

/* --------------------------------------------------------------------------
   Container & Layout
   -------------------------------------------------------------------------- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--space-md);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
    padding: var(--space-xl) 0;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
    margin: 0 0 var(--space-md);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.5rem; font-family: var(--font-sans); font-weight: 600; }
h3 { font-size: 1.25rem; font-family: var(--font-sans); }

p {
    margin: 0 0 var(--space-md);
}

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

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

code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--color-bg-alt);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
header {
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md) 0;
    margin-bottom: var(--space-md);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo img {
    height: 2.2rem;
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
}

.nav-links a {
    color: var(--color-text-muted);
    font-weight: 500;
    padding: var(--space-xs) 0;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

.nav-links a:hover {
    color: var(--color-text);
    border-bottom-color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
footer {
    border-top: 1px solid var(--color-border);
    padding: var(--space-lg) 0;
    margin-top: var(--space-xl);
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.875rem;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.625rem 1.25rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 600;
    line-height: 1.4;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
}

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

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

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border-color: var(--color-border-strong);
}

.btn-secondary:hover {
    background: var(--color-bg-alt);
    border-color: var(--color-text-muted);
}

.btn-danger {
    background: var(--color-error);
    color: white;
    border-color: var(--color-error);
}

.btn-danger:hover {
    background: #b04545;
    border-color: #b04545;
}

.btn-enable {
    background: var(--color-secondary-light);
    color: var(--color-secondary);
    border-color: var(--color-secondary);
}

.btn-enable:hover {
    background: var(--color-secondary);
    color: white;
    border-color: var(--color-secondary);
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

.btn-block {
    width: 100%;
}

/* --------------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------------- */
.form-group {
    margin-bottom: var(--space-lg);
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

input[type="text"],
input[type="password"],
input[type="email"],
textarea,
select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

input::placeholder,
textarea::placeholder {
    color: var(--color-text-light);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

input[type="file"] {
    font-family: var(--font-sans);
    font-size: 0.9375rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: normal;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin: 0;
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-sm);
}

.card h2 {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

.card h2 .icon {
    font-size: 1.25rem;
}

/* --------------------------------------------------------------------------
   Flash Messages
   -------------------------------------------------------------------------- */
.flash-messages {
    margin-bottom: var(--space-lg);
}

.flash {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
    font-weight: 500;
}

.flash-success {
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.flash-error {
    background: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid var(--color-error);
}

.flash-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning);
    border: 1px solid var(--color-warning);
}

.flash-info {
    background: var(--color-info-bg);
    color: var(--color-info);
    border: 1px solid var(--color-info);
}

.flash-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0.6;
    line-height: 1;
    padding: 0;
    margin-left: var(--space-md);
}

.flash-close:hover {
    opacity: 1;
}

/* --------------------------------------------------------------------------
   Hero Section (Landing Page)
   -------------------------------------------------------------------------- */
.hero {
    text-align: center;
    padding: var(--space-2xl) 0;
    max-width: 600px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.hero .subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-2xl);
}

.exam-code-form {
    margin-bottom: var(--space-lg);
}

.input-group {
    display: flex;
    gap: var(--space-sm);
    max-width: 500px;
    margin: 0 auto;
}

.input-group input {
    flex: 1;
}

.hint {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

/* --------------------------------------------------------------------------
   Exam Page (Student View)
   -------------------------------------------------------------------------- */
.exam-page {
    max-width: 800px;
    margin: 0 auto;
}

.exam-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

/* Gate screen: student identification before accessing exam */
.gate-screen {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 40vh;
}

.gate-card {
    width: 100%;
    max-width: 480px;
    text-align: center;
}

.gate-subtitle {
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

.gate-form .form-group {
    text-align: left;
}

/* Participant banner: shows current student name with change option */
.participant-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-primary-light, var(--color-bg-alt));
    font-size: 0.9375rem;
}

.exam-description {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
}

/* Submission thank-you page */
.submission-thank-you .thank-you-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.submission-thank-you .thank-you-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 4rem;
    height: 4rem;
    margin-bottom: var(--space-md);
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 2px solid var(--color-success);
    border-radius: 50%;
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
}

.submission-thank-you .thank-you-lead {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-top: var(--space-md);
}

.submission-thank-you .submission-receipt {
    margin-bottom: var(--space-xl);
}

.submission-thank-you .receipt-details {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-sm) var(--space-lg);
    margin: 0;
}

.submission-thank-you .receipt-details dt {
    font-weight: 600;
    color: var(--color-text-muted);
    margin: 0;
}

.submission-thank-you .receipt-details dd {
    margin: 0;
}

.submission-thank-you .thank-you-actions {
    text-align: center;
}

.submission-thank-you .thank-you-actions .btn {
    margin-bottom: var(--space-md);
}

.submission-thank-you .action-hint {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin: 0;
}

/* --------------------------------------------------------------------------
   Markdown Content Styling
   -------------------------------------------------------------------------- */
.markdown-content {
    line-height: 1.7;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
    margin-top: var(--space-lg);
    margin-bottom: var(--space-md);
}

.markdown-content h1:first-child,
.markdown-content h2:first-child,
.markdown-content h3:first-child {
    margin-top: 0;
}

.markdown-content h1 { font-size: 1.5rem; }
.markdown-content h2 { font-size: 1.25rem; }
.markdown-content h3 { font-size: 1.125rem; }

.markdown-content p {
    margin-bottom: var(--space-md);
}

.markdown-content p:last-child {
    margin-bottom: 0;
}

.markdown-content ul,
.markdown-content ol {
    margin: 0 0 var(--space-md);
    padding-left: var(--space-xl);
}

.markdown-content li {
    margin-bottom: var(--space-xs);
}

.markdown-content li:last-child {
    margin-bottom: 0;
}

.markdown-content blockquote {
    margin: var(--space-md) 0;
    padding: var(--space-md) var(--space-lg);
    border-left: 4px solid var(--color-primary);
    background: var(--color-bg-alt);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--color-text-muted);
}

.markdown-content blockquote p:last-child {
    margin-bottom: 0;
}

.markdown-content pre {
    margin: var(--space-md) 0;
    padding: var(--space-md);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow-x: auto;
}

.markdown-content pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: 0.875rem;
}

.markdown-content a {
    color: var(--color-primary);
    text-decoration: underline;
}

.markdown-content a:hover {
    color: var(--color-primary-hover);
}

.markdown-content strong {
    font-weight: 600;
}

.markdown-content em {
    font-style: italic;
}

.markdown-content hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--space-lg) 0;
}

.markdown-content table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-md) 0;
}

.markdown-content th,
.markdown-content td {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    text-align: left;
}

.markdown-content th {
    background: var(--color-bg-alt);
    font-weight: 600;
}

.exam-content {
    display: grid;
    gap: var(--space-lg);
}

.document-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.document-list li {
    margin-bottom: var(--space-sm);
}

.document-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: all 0.2s ease;
}

.document-link:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
}

.doc-icon {
    font-size: 1.5rem;
}

.doc-name {
    flex: 1;
    font-weight: 500;
    color: var(--color-text);
}

.url-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.url-list li {
    margin-bottom: var(--space-sm);
}

.url-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: all 0.2s ease;
    text-decoration: none;
}

.url-link:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
}

.url-icon {
    font-size: 1.5rem;
}

.url-text {
    flex: 1;
    font-weight: 500;
    color: var(--color-text);
    word-break: break-all;
}

.submission-form {
    margin-top: var(--space-md);
}

.file-input-wrapper {
    margin-top: var(--space-sm);
}

.file-hint {
    font-size: 0.8125rem;
    color: var(--color-text-light);
    margin-top: var(--space-sm);
}

.exam-footer {
    text-align: center;
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.exam-code {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.empty-state {
    color: var(--color-text-muted);
    font-style: italic;
}

/* --------------------------------------------------------------------------
   Login Page
   -------------------------------------------------------------------------- */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.login-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-md);
    text-align: center;
}

.login-card h1 {
    margin-bottom: var(--space-sm);
}

.login-subtitle {
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
}

.login-form .form-group {
    text-align: left;
}

/* --------------------------------------------------------------------------
   Dashboard
   -------------------------------------------------------------------------- */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.dashboard-header h1 {
    margin-bottom: 0;
}

.school-name {
    color: var(--color-text-muted);
    font-size: 1rem;
    margin: var(--space-xs) 0 0 0;
}

.exam-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.exam-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
}

.exam-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-border-strong);
}

.exam-card.exam-inactive {
    opacity: 0.7;
}

.exam-card.exam-current {
    border-color: var(--color-secondary);
    border-width: 2px;
    box-shadow: 0 0 0 3px var(--color-secondary-light), var(--shadow-md);
}

.exam-card.exam-current:hover {
    box-shadow: 0 0 0 3px var(--color-secondary-light), var(--shadow-lg);
}

.exam-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.exam-card-header h2 {
    margin: 0;
    font-size: 1.25rem;
    line-height: 1.3;
}

.badge {
    display: inline-block;
    padding: 0.2em 0.6em;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

.badge-active {
    background: var(--color-secondary-light);
    color: var(--color-secondary);
}

.badge-inactive {
    background: var(--color-bg-alt);
    color: var(--color-text-light);
}

.badge-current {
    background: var(--color-secondary);
    color: white;
}

.exam-card-description {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    margin-bottom: var(--space-md);
    flex: 1;
}

.exam-card-stats {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-md);
}

.stat {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.exam-card-meta {
    font-size: 0.8125rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-md);
}

.exam-card-actions {
    margin-top: auto;
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

/* Empty State */
.empty-state-large {
    text-align: center;
    padding: var(--space-2xl);
    background: var(--color-surface);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
}

.empty-state-large h2 {
    margin-bottom: var(--space-sm);
}

.empty-state-large p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

/* --------------------------------------------------------------------------
   Form Page (Create/Edit Exam)
   -------------------------------------------------------------------------- */
.form-page {
    max-width: 900px;
    margin: 0 auto;
}

.form-header {
    margin-bottom: var(--space-xl);
}

.back-link {
    display: inline-block;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.back-link:hover {
    color: var(--color-primary);
}

.exam-form {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-md);
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

/* School URLs compact list (shown below exam-specific URLs) */
.school-urls-info {
    margin-top: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
}

.school-urls-info > small {
    color: var(--color-text-muted);
    display: block;
    margin-bottom: var(--space-xs);
}

.school-urls-compact {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs) var(--space-md);
}

.school-urls-compact li {
    display: inline;
}

.school-urls-compact a {
    color: var(--color-primary);
    text-decoration: none;
    font-size: 0.8125rem;
}

.school-urls-compact a:hover {
    text-decoration: underline;
}

/* Edit page sections (Materials, etc.) */
.edit-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-top: var(--space-xl);
}

.edit-section h2 {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
    font-size: 1.25rem;
}

.edit-section h2 .icon {
    font-size: 1.25rem;
}

.edit-section h2 .count {
    font-size: 0.875rem;
    font-weight: normal;
    color: var(--color-text-muted);
}

.edit-section .upload-form {
    margin-bottom: var(--space-lg);
}

.edit-section .upload-row {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

.edit-section .upload-row input[type="file"] {
    flex: 1;
}

.edit-section .data-table {
    width: 100%;
}

.edit-section .empty-state {
    color: var(--color-text-muted);
    font-style: italic;
}

/* --------------------------------------------------------------------------
   Exam Detail Page
   -------------------------------------------------------------------------- */
.exam-detail {
    max-width: 900px;
    margin: 0 auto;
}

.detail-header {
    margin-bottom: var(--space-xl);
}

.detail-title-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.detail-title-row h1 {
    margin-bottom: var(--space-xs);
}

.detail-actions {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.detail-description {
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

.exam-link-box {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
}

.exam-link-box label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.link-display {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.link-display code {
    flex: 1;
    min-width: 0;
    overflow-x: auto;
    padding: var(--space-md);
    background: var(--color-surface);
}

.link-hint {
    font-size: 0.8125rem;
    color: var(--color-text-light);
    margin-top: var(--space-sm);
    margin-bottom: 0;
}

.detail-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    overflow: hidden;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.section-header h2 {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin: 0;
}

.count {
    font-weight: normal;
    color: var(--color-text-muted);
    font-size: 1rem;
}

.upload-form {
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.upload-row {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* Data Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: var(--space-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.data-table th {
    font-weight: 600;
    color: var(--color-text-muted);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--color-bg-alt);
}

.data-table tbody tr:hover {
    background: var(--color-bg);
}

.file-cell {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    overflow-wrap: anywhere;
    word-break: break-all;
    min-width: 0;
}

.student-cell strong {
    color: var(--color-text);
}

.nowrap {
    white-space: nowrap;
}

.actions-cell {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    white-space: nowrap;
}

.inline-form {
    display: inline-flex;
    align-items: center;
    margin: 0;
}

/* Danger Zone */
.danger-zone {
    background: var(--color-error-bg);
    border: 1px solid var(--color-error);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-top: var(--space-xl);
}

.danger-zone h3 {
    color: var(--color-error);
    margin-bottom: var(--space-md);
    font-size: 1rem;
}

.danger-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.danger-info strong {
    display: block;
    margin-bottom: var(--space-xs);
}

.danger-info p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* --------------------------------------------------------------------------
   Delete Confirmation Modal
   -------------------------------------------------------------------------- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(45, 42, 38, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--space-md);
}

.modal-content {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 480px;
    width: 100%;
    animation: modalSlideIn 0.2s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
    margin: 0;
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--color-text);
}

.modal-header h3.modal-header-danger {
    color: var(--color-error);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 0;
    line-height: 1;
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--color-text);
}

.modal-body {
    padding: var(--space-lg);
}

.modal-warning {
    color: var(--color-error);
    font-weight: 500;
    margin-bottom: var(--space-md);
    padding: var(--space-md);
    background: var(--color-error-bg);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-error);
}

.modal-info {
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.modal-exam-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    padding: var(--space-md);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    text-align: center;
    margin-bottom: var(--space-md);
}

.modal-warning-soft {
    color: var(--color-warning);
    font-size: 0.9375rem;
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
    background: var(--color-warning-bg);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-warning);
}

.modal-instruction {
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.confirmation-code {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--color-text);
    text-align: center;
    padding: var(--space-lg);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    border: 2px dashed var(--color-border-strong);
    margin-bottom: var(--space-lg);
    letter-spacing: 0.05em;
    user-select: none;
}

.confirmation-input {
    width: 100%;
    padding: var(--space-md);
    font-size: 1.25rem;
    font-family: var(--font-mono);
    text-align: center;
    letter-spacing: 0.3em;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.confirmation-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.input-hint {
    font-size: 0.875rem;
    text-align: center;
    margin: var(--space-sm) 0 var(--space-lg);
    min-height: 1.5em;
    color: var(--color-text-muted);
}

.input-hint.hint-success {
    color: var(--color-success);
    font-weight: 500;
}

.input-hint.hint-error {
    color: var(--color-error);
}

.modal-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: flex-end;
}

.modal-actions .btn {
    min-width: 120px;
}

.modal-actions .btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* --------------------------------------------------------------------------
   Monitoring Preview Section
   -------------------------------------------------------------------------- */
.monitoring-preview {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.monitoring-section .empty-state {
    margin-top: var(--space-lg);
}

.monitoring-stats {
    display: flex;
    gap: var(--space-xl);
}

.monitoring-stat {
    text-align: center;
}

.monitoring-stat .stat-value {
    display: block;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.2;
}

.monitoring-stat .stat-label {
    display: block;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.monitoring-stat.stat-highlight .stat-value {
    color: var(--color-success);
}

.monitoring-stat.stat-warning .stat-value {
    color: var(--color-warning);
}

.monitoring-link {
    flex-shrink: 0;
}

@media (max-width: 600px) {
    .monitoring-preview {
        flex-direction: column;
        align-items: stretch;
    }
    
    .monitoring-stats {
        justify-content: space-around;
    }
    
    .monitoring-link {
        width: 100%;
    }
}

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.25rem;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .dashboard-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .detail-title-row {
        flex-direction: column;
    }
    
    .data-table {
        font-size: 0.875rem;
    }
    
    .data-table th,
    .data-table td {
        padding: var(--space-sm);
    }
    
    .actions-cell {
        flex-direction: column;
    }
    
    .danger-content {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
}