/* ===== Schoology Cloud — Main Stylesheet ===== */

/* --- CSS Custom Properties --- */
:root {
    --color-primary: #1a3c6e;
    --color-primary-hover: #2d5a9e;
    --color-primary-active: #0f2a4e;
    --color-success: #27ae60;
    --color-success-hover: #219a52;
    --color-success-active: #1e8449;
    --color-danger: #e74c3c;
    --color-danger-hover: #c0392b;
    --color-muted: #636e72;
    --color-muted-hover: #556b70;
    --color-warning: #e67e22;
    --color-text: #2d3436;
    --color-text-secondary: #4a5568;
    --color-text-light: #4d5a5e;
    --color-bg: #f5f6fa;
    --color-card: #ffffff;
    --color-border: #ddd;
    --color-border-light: #eee;
    --color-border-lighter: #f0f0f0;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-card: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-focus: 0 0 0 2px rgba(26,60,110,0.15);
    --color-bg-hover: #f8f9fa;
    --color-bg-subtle: #f5f7fa;
    --color-disabled: #95a5a6;
    --color-secondary-hover: #e8ecf1;
    --color-border-faint: #f5f5f5;
    --radius-pill: 12px;
    --color-code-bg: #f0f0f0;
    --color-breadcrumb-sep: #777;
    --color-guide-even-row: var(--color-bg-subtle);
    --color-blockquote-bg: #fff5f5;
    --color-border-medium: #ccc;
    --color-chip-bg: #f0f4f8;
    --color-chip-border: #dce4ec;
    --color-nav-divider: rgba(255,255,255,0.15);
    --color-ai-bg: #e8f0fe;
    --color-ai-border: #c2d7f2;
    --color-info-bg: var(--color-bg-subtle);
    --color-badge-success-bg: #d4edda;
    --color-badge-success-text: #155724;
    --color-badge-danger-bg: #f8d7da;
    --color-badge-danger-text: #721c24;
    --color-badge-warning-bg: #fff3cd;
    --color-badge-warning-text: #856404;
    --color-badge-info-bg: #d1ecf1;
    --color-badge-info-text: #0c5460;
    --color-progress-bg: #e0e0e0;
    --color-type-comprehensive-bg: #d1ecf1;
    --color-type-comprehensive-text: #0c5460;
    --color-type-flashcards-bg: #fff3cd;
    --color-type-flashcards-text: #856404;
    --color-type-practice-bg: #ffecd2;
    --color-type-practice-text: #8a5a00;
    --color-type-summary-bg: #d4edda;
    --color-type-summary-text: #155724;
    --color-type-terms-bg: #e2d9f3;
    --color-type-terms-text: #4a235a;
    --color-type-quiz-bg: #e8f5e9;
    --color-type-quiz-text: #2e7d32;
    --color-type-error-hunt-bg: #fce4ec;
    --color-type-error-hunt-text: #c62828;
}

/* --- Reset & Base --- */
* { margin: 0; padding: 0; box-sizing: border-box; }
img { max-width: 100%; height: auto; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: var(--color-bg); color: var(--color-text); }

/* --- Accessibility: Skip link & Screen reader only --- */
.skip-link {
    position: absolute; top: -100%; left: 1rem; z-index: 1000;
    padding: 0.5rem 1rem; background: var(--color-primary); color: white;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm); text-decoration: none; font-weight: 600;
}
.skip-link:focus { top: 0; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* --- Navigation --- */
.nav { background: var(--color-primary); color: white; padding: 1rem 2rem; display: flex; justify-content: space-between; align-items: center; }
.nav a { color: white; text-decoration: none; margin-left: 1.5rem; opacity: 0.85; transition: opacity 0.15s; }
.nav a:hover, .nav a[aria-current="page"] { opacity: 1; }
.nav a[aria-current="page"] { font-weight: 600; }
.nav .brand { font-size: 1.25rem; font-weight: 700; text-decoration: none; color: white; opacity: 1; margin-left: 0; }
.nav-links { display: flex; flex-wrap: wrap; gap: 0; align-items: center; }

/* Hamburger toggle (hidden by default) */
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; color: white; font-size: 1.5rem; line-height: 1; }

/* --- Layout --- */
.container { max-width: 1100px; margin: 2rem auto; padding: 0 1.5rem; }

/* --- Cards --- */
.card { background: var(--color-card); border-radius: var(--radius-lg); padding: 1.5rem; margin-bottom: 1.5rem; box-shadow: var(--shadow-card); }
.card h2 { margin-bottom: 1rem; color: var(--color-primary); }

/* --- Tables --- */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 0.75rem; text-align: left; border-bottom: 1px solid var(--color-border-light); }
th { font-weight: 600; color: var(--color-text-light); font-size: 0.85rem; text-transform: uppercase; }
tr:hover td { background: var(--color-bg-hover); }

/* --- Buttons --- */
.btn { display: inline-block; padding: 0.5rem 1rem; border-radius: var(--radius-sm); text-decoration: none; font-size: 0.9rem; cursor: pointer; border: none; transition: background 0.15s, transform 0.1s; }
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--color-primary); color: white; }
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-primary:active { background: var(--color-primary-active); }
.btn-success { background: var(--color-success); color: white; }
.btn-success:hover { background: var(--color-success-hover); }
.btn-success:active { background: var(--color-success-active); }
.btn-secondary { background: var(--color-bg-subtle); color: var(--color-primary); border: 1px solid var(--color-primary); }
.btn-secondary:hover { background: var(--color-secondary-hover); }
.btn-danger { background: var(--color-danger); color: white; }
.btn-danger:hover { background: var(--color-danger-hover); }
.btn-muted { background: var(--color-muted); color: white; }
.btn-muted:hover { background: var(--color-muted-hover); }
.btn-sm { padding: 0.3rem 0.7rem; font-size: 0.8rem; }
.btn-wide { width: 100%; text-align: center; }
.btn:disabled, .btn[disabled] { background: var(--color-disabled); cursor: not-allowed; opacity: 0.7; }

/* --- Forms --- */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.3rem; font-weight: 500; font-size: 0.9rem; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 0.5rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); font-size: 0.95rem;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--color-primary); box-shadow: var(--shadow-focus); outline: none;
}
.form-hint { color: var(--color-text-light); font-size: 0.8rem; margin-top: 0.25rem; }
.form-label-secondary { font-size: 0.9rem; color: var(--color-text-secondary); }

/* Form grid layouts */
.form-grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr auto; gap: 0.75rem; align-items: end; }
.form-grid-2 { display: grid; grid-template-columns: 1fr auto; gap: 0.5rem; align-items: end; }
.form-grid-course { display: grid; grid-template-columns: 1fr 2fr auto; gap: 0.5rem; align-items: end; }
.form-grid-schedule { display: grid; grid-template-columns: 1fr 1fr 1fr auto auto; gap: 0.75rem; align-items: end; }

/* --- Badges --- */
.badge { padding: 0.2rem 0.6rem; border-radius: var(--radius-pill); font-size: 0.75rem; font-weight: 600; }
.badge-success { background: var(--color-badge-success-bg); color: var(--color-badge-success-text); }
.badge-danger { background: var(--color-badge-danger-bg); color: var(--color-badge-danger-text); }
.badge-warning { background: var(--color-badge-warning-bg); color: var(--color-badge-warning-text); }
.badge-info { background: var(--color-badge-info-bg); color: var(--color-badge-info-text); }

/* --- Alerts --- */
.alert { padding: 0.75rem 1rem; border-radius: var(--radius-sm); margin-bottom: 1rem; }
.alert-error { background: var(--color-badge-danger-bg); color: var(--color-badge-danger-text); }
.alert-success { background: var(--color-badge-success-bg); color: var(--color-badge-success-text); }

/* --- Flash Messages --- */
.flash-msg { padding: 0.75rem 1rem; border-radius: var(--radius-sm); margin-bottom: 1rem; position: relative; animation: flash-in 0.3s ease-out; }
.flash-msg.success { background: var(--color-badge-success-bg); color: var(--color-badge-success-text); }
.flash-msg.error { background: var(--color-badge-danger-bg); color: var(--color-badge-danger-text); }
.flash-msg.info { background: var(--color-badge-info-bg); color: var(--color-badge-info-text); }
.flash-msg .flash-close { position: absolute; top: 0.5rem; right: 0.75rem; background: none; border: none; font-size: 1.1rem; cursor: pointer; opacity: 0.6; color: inherit; }
.flash-msg .flash-close:hover { opacity: 1; }
@keyframes flash-in { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }

/* --- Grid --- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }

/* --- Breadcrumbs --- */
.breadcrumbs { font-size: 0.9rem; color: var(--color-text-light); margin-bottom: 1rem; }
.breadcrumbs a { color: var(--color-primary); text-decoration: none; }
.breadcrumbs a:hover { text-decoration: underline; }
.breadcrumbs .sep { margin: 0 0.4rem; color: var(--color-breadcrumb-sep); }

/* --- Focus styles (accessibility) --- */
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

/* --- Loading spinner for buttons --- */
.btn-loading { position: relative; pointer-events: none; font-size: 0; }
.btn-loading::after {
    content: ''; position: absolute; top: 50%; left: 50%; width: 16px; height: 16px;
    margin: -8px 0 0 -8px; border: 2px solid rgba(255,255,255,0.3); border-top-color: white;
    border-radius: 50%; animation: btn-spin 0.6s linear infinite;
}
@keyframes btn-spin { to { transform: rotate(360deg); } }

/* --- Auth pages --- */
.auth-wrapper { max-width: 400px; margin: 4rem auto; }
.auth-link { color: var(--color-primary); font-size: 0.9rem; text-decoration: none; }
.auth-link:hover { text-decoration: underline; }
.auth-link-subtle { color: var(--color-text-light); font-size: 0.85rem; text-decoration: none; }
.auth-link-subtle:hover { text-decoration: underline; color: var(--color-primary); }

/* --- Utility classes --- */
.text-secondary { color: var(--color-text-secondary); }
.text-light { color: var(--color-text-light); }
.text-center { text-align: center; }
.text-danger { color: var(--color-danger); }
.text-right { text-align: right; }
.text-sm { font-size: 0.85rem; }
.text-xs { font-size: 0.8rem; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-align-center { align-items: center; }
.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 0.75rem; }
.gap-3 { gap: 1rem; }
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.page-header h1 { margin: 0; }
.inline-form { display: inline; }
.ml-1 { margin-left: 0.75rem; }
.truncate { max-width: 200px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hidden { display: none; }
.p-1 { padding: 1rem; }
.w-full { width: 100%; }
.link-primary { color: var(--color-primary); text-decoration: none; }
.link-primary:hover { text-decoration: underline; }
button.link-primary { background: none; border: none; font: inherit; cursor: pointer; padding: 0; }

/* --- Study Hub Components --- */
.hub-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.hub-header h1 { color: var(--color-primary); }
.gen-form { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.gen-form .full-width { grid-column: 1 / -1; }
.gen-form select, .gen-form input { width: 100%; padding: 0.5rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); font-size: 1rem; }
.gen-form select:focus, .gen-form input:focus { border-color: var(--color-primary); box-shadow: var(--shadow-focus); outline: none; }
.gen-form label { display: block; margin-bottom: 0.3rem; font-weight: 500; font-size: 0.9rem; color: var(--color-text-secondary); }
.guide-card { display: flex; justify-content: space-between; align-items: center; padding: 1rem; border-bottom: 1px solid var(--color-border-light); }
.guide-card:last-child { border-bottom: none; }
.guide-meta { color: var(--color-text-secondary); font-size: 0.9rem; }
.guide-title { font-weight: 600; color: var(--color-primary); text-decoration: none; }
.guide-title:hover { text-decoration: underline; }
.qa-check { color: var(--color-success); font-weight: 600; font-size: 0.9rem; }
.qa-warn { color: var(--color-warning); font-weight: 600; font-size: 0.9rem; }
.progress-bar { width: 100%; height: 16px; background: var(--color-progress-bg); border-radius: var(--radius-md); overflow: hidden; margin: 0.5rem 0; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--color-primary), var(--color-primary-hover)); border-radius: var(--radius-md); transition: width 0.5s ease; }
#gen-progress { display: none; }
.type-badge { display: inline-block; padding: 0.15rem 0.5rem; border-radius: var(--radius-md); font-size: 0.8rem; font-weight: 600; margin-left: 0.5rem; }
.type-comprehensive { background: var(--color-type-comprehensive-bg); color: var(--color-type-comprehensive-text); }
.type-flashcards { background: var(--color-type-flashcards-bg); color: var(--color-type-flashcards-text); }
.type-practice_test { background: var(--color-type-practice-bg); color: var(--color-type-practice-text); }
.type-quick_summary { background: var(--color-type-summary-bg); color: var(--color-type-summary-text); }
.type-key_terms { background: var(--color-type-terms-bg); color: var(--color-type-terms-text); }
.type-practice_test_prior { background: var(--color-type-practice-bg); color: var(--color-type-practice-text); }
.type-mini_quiz { background: var(--color-type-quiz-bg); color: var(--color-type-quiz-text); }
.type-error_hunt { background: var(--color-type-error-hunt-bg); color: var(--color-type-error-hunt-text); }
.downloads a { margin-left: 0.5rem; }

/* Document browser */
.doc-browser { max-height: 400px; overflow-y: auto; border: 1px solid var(--color-border-light); border-radius: var(--radius-sm); }
.doc-item { display: flex; justify-content: space-between; align-items: center; padding: 0.6rem 1rem; border-bottom: 1px solid var(--color-border-lighter); font-size: 0.9rem; }
.doc-item:last-child { border-bottom: none; }
.doc-item:hover { background: var(--color-bg-subtle); }
.doc-icon { margin-right: 0.5rem; }
.doc-folder { color: var(--color-text-secondary); font-size: 0.8rem; }
.doc-actions a { margin-left: 0.5rem; font-size: 0.9rem; color: var(--color-primary); text-decoration: none; }
.doc-actions a:hover { text-decoration: underline; }

/* Upload area */
.upload-area { border: 2px dashed var(--color-border-medium); border-radius: var(--radius-md); padding: 1.5rem; text-align: center; cursor: pointer; transition: border-color 0.2s; margin-bottom: 1rem; }
.upload-area:hover, .upload-area.dragover { border-color: var(--color-primary); background: var(--color-bg-subtle); }
.upload-area input[type=file] { display: none; }
.upload-status { font-size: 0.9rem; color: var(--color-text-secondary); margin-top: 0.5rem; }

/* Tabs */
.tab-row { display: flex; gap: 0; border-bottom: 2px solid var(--color-border-light); margin-bottom: 1rem; }
.tab-btn { padding: 0.5rem 1.25rem; background: none; border: none; font-size: 0.9rem; color: var(--color-text-secondary); cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -2px; }
.tab-btn.active { color: var(--color-primary); font-weight: 600; border-bottom-color: var(--color-primary); }

/* Details toggle */
.details-toggle { cursor: pointer; font-weight: 600; color: var(--color-primary); }
.form-narrow { margin-top: 1rem; max-width: 500px; }

/* Customize toggle */
.customize-toggle { display: inline-block; cursor: pointer; color: var(--color-primary); font-size: 0.9rem; margin-bottom: 0.75rem; user-select: none; }
.customize-toggle:hover { text-decoration: underline; }
button.customize-toggle { background: none; border: none; padding: 0; font: inherit; }
.customize-section { display: none; }
.customize-section.open { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* File select summary */
.file-summary { font-size: 0.9rem; color: var(--color-text-secondary); padding: 0.5rem 0; }
.file-summary a { color: var(--color-primary); cursor: pointer; text-decoration: none; }
.file-summary a:hover { text-decoration: underline; }

/* Form textareas */
.form-textarea { width: 100%; padding: 0.5rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); font-size: 0.9rem; font-family: inherit; resize: vertical; }
.form-textarea:focus { border-color: var(--color-primary); box-shadow: var(--shadow-focus); outline: none; }

/* Guide search */
.guide-search-input { flex: 1; min-width: 200px; padding: 0.5rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); font-size: 0.9rem; }
.guide-search-input:focus { border-color: var(--color-primary); box-shadow: var(--shadow-focus); outline: none; }

/* Admin grid */
.admin-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; max-width: 400px; }

/* Generate button */
.btn-generate { padding: 0.75rem 2rem; font-size: 1.05rem; background: var(--color-success); color: white; border: none; border-radius: var(--radius-md); cursor: pointer; font-weight: 600; width: 100%; }
.btn-generate:hover { background: var(--color-success-hover); }
.btn-generate:active { background: var(--color-success-active); transform: scale(0.98); }
.btn-generate:disabled { background: var(--color-disabled); cursor: not-allowed; }
.btn-generate.btn-loading { font-size: 0; min-height: 48px; }

/* Progress */
.progress-msg { font-size: 1rem; font-weight: 500; }
.progress-hint { font-size: 0.9rem; color: var(--color-text-secondary); margin-top: 0.25rem; }

/* File checklist */
.file-checklist { max-height: 300px; overflow-y: auto; border: 1px solid var(--color-border-light); border-radius: var(--radius-sm); padding: 0.5rem; }
.file-check-label { display: flex; align-items: center; padding: 0.6rem 0.5rem; font-size: 0.9rem; cursor: pointer; border-bottom: 1px solid var(--color-border-faint); min-height: 44px; }
.file-check-label:hover { background: var(--color-bg-subtle); }
.file-check-label input { margin-right: 0.5rem; width: 18px; height: 18px; }

/* --- Guide View Components --- */
.guide-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 1.5rem; flex-wrap: wrap; gap: 1rem; }
.guide-header h1 { color: var(--color-primary); font-size: 1.5rem; }
.guide-info { color: var(--color-text-secondary); font-size: 0.9rem; margin-top: 0.25rem; }
.guide-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }
.guide-content { background: var(--color-card); border-radius: var(--radius-lg); padding: 2rem; box-shadow: var(--shadow-card); line-height: 1.7; }
.guide-content h1 { color: var(--color-primary); border-bottom: 2px solid var(--color-primary); padding-bottom: 0.5rem; margin: 1.5rem 0 1rem; }
.guide-content h2 { color: var(--color-primary); margin: 1.25rem 0 0.75rem; }
.guide-content h3 { color: var(--color-primary-hover); margin: 1rem 0 0.5rem; }
.guide-content table { width: 100%; border-collapse: collapse; margin: 0.75rem 0; }
.guide-content th, .guide-content td { border: 1px solid var(--color-border-medium); padding: 0.5rem 0.75rem; text-align: left; }
.guide-content th { background: var(--color-primary); color: white; }
.guide-content tr:nth-child(even) { background: var(--color-guide-even-row); }
.guide-content blockquote { border-left: 4px solid var(--color-danger); padding: 0.5rem 1rem; background: var(--color-blockquote-bg); margin: 0.75rem 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.guide-content pre { white-space: pre-wrap; word-wrap: break-word; }
.guide-content code { background: var(--color-code-bg); padding: 1px 4px; border-radius: 3px; font-size: 0.9em; }
.guide-content strong { color: var(--color-primary); }
.guide-content ul, .guide-content ol { margin: 0.5rem 0 0.5rem 1.5rem; }
.guide-content li { margin-bottom: 0.3rem; }
.guide-content .answer-key-collapse { margin-top: 2rem; border: 2px solid var(--color-primary); border-radius: var(--radius-md); }
.guide-content .answer-key-collapse > summary { padding: 12px 16px; background: var(--color-primary); color: white; cursor: pointer; font-weight: 600; font-size: 1.1em; border-radius: 6px 6px 0 0; list-style: none; }
.guide-content .answer-key-collapse > summary::-webkit-details-marker { display: none; }
.guide-content .answer-key-collapse > summary::before { content: '\25B6 '; }
.guide-content .answer-key-collapse[open] > summary::before { content: '\25BC '; }
.guide-content .answer-key-collapse > *:not(summary) { padding: 0 16px; }
.qa-verified { display: inline-block; padding: 0.2rem 0.6rem; border-radius: var(--radius-pill); font-size: 0.9rem; font-weight: 600; }
.qa-pass { background: var(--color-badge-success-bg); color: var(--color-badge-success-text); }
.qa-warn-badge { background: var(--color-badge-warning-bg); color: var(--color-badge-warning-text); }

/* Source materials panel */
.source-panel { background: var(--color-card); border-radius: var(--radius-lg); padding: 1.5rem; margin-bottom: 1.5rem; box-shadow: var(--shadow-card); }
.source-panel-toggle { color: var(--color-primary); margin-bottom: 0.75rem; cursor: pointer; background: none; border: none; font: inherit; font-size: inherit; font-weight: 600; padding: 0; width: 100%; text-align: left; }
.source-panel-toggle::after { content: ' \25B6'; font-size: 0.8em; }
.source-panel.expanded .source-panel-toggle::after { content: ' \25BC'; }
.source-panel .source-list { display: none; }
.source-panel.expanded .source-list { display: block; }
.source-item { display: flex; justify-content: space-between; align-items: center; padding: 0.5rem 0; border-bottom: 1px solid var(--color-border-lighter); font-size: 0.9rem; }
.source-item:last-child { border-bottom: none; }
.source-item a { color: var(--color-primary); text-decoration: none; margin-left: 0.75rem; font-size: 0.9rem; }
.source-item a:hover { text-decoration: underline; }

/* Guide view buttons */
.btn-pdf { padding: 0.5rem 1.25rem; font-size: 1rem; font-weight: 600; }
.back-link { display: inline-block; margin-bottom: 1rem; color: var(--color-primary); text-decoration: none; font-size: 0.9rem; }
.back-link:hover { text-decoration: underline; }
.guide-footer { margin-top: 2rem; padding-top: 1rem; border-top: 1px solid var(--color-border-light); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }

/* Teacher section */
#teacher-section { display: none; margin-top: 0.75rem; }
#teacher-section.open { display: block; }

/* Google Docs status classes */
.gdoc-status-ok { color: var(--color-success); }
.gdoc-status-warn { color: var(--color-warning); }
.gdoc-type-label { margin-left: 0.5rem; }

/* AI Disclosure */
.ai-disclosure { background: var(--color-ai-bg); border: 1px solid var(--color-ai-border); border-radius: var(--radius-sm); padding: 0.75rem 1rem; margin-bottom: 1.5rem; font-size: 0.9rem; color: var(--color-text-secondary); line-height: 1.5; }

/* Info block for structured display (replaces <br> chains) */
.info-line { margin-bottom: 0.25rem; }

/* --- Dashboard Components --- */
.course-chip { background: var(--color-chip-bg); padding: 0.3rem 0.75rem; border-radius: var(--radius-sm); font-size: 0.9rem; border: 1px solid var(--color-chip-border); display: inline-block; }
.folder-header { font-size: 0.95rem; color: var(--color-text-light); margin: 1rem 0 0.5rem; border-bottom: 1px solid var(--color-border-light); padding-bottom: 0.3rem; }
.folder-header span { font-weight: normal; font-size: 0.85em; }
.info-hint { font-size: 0.9rem; color: var(--color-text-secondary); background: var(--color-info-bg); border-radius: var(--radius-sm); padding: 0.75rem; }
.info-hint a { color: var(--color-primary); text-decoration: none; }
.info-hint a:hover { text-decoration: underline; }
.student-selector { width: auto; padding: 0.4rem 0.75rem; font-size: 1rem; }
.admin-settings-label { font-size: 0.9rem; color: var(--color-text-secondary); }
.admin-input { width: 100%; padding: 0.5rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); }
.admin-input:focus { border-color: var(--color-primary); box-shadow: var(--shadow-focus); outline: none; }
.inline-select { width: auto; padding: 0.25rem 0.5rem; font-size: 0.9rem; }
.section-divider { border-top: 2px solid var(--color-border-light); margin-top: 0.5rem; padding-top: 0.75rem; }
.course-group-header { font-weight: 600; font-size: 0.95rem; color: var(--color-primary); padding: 0.75rem 0 0.25rem; }
.checklist-folder { font-weight: 600; font-size: 0.9rem; color: var(--color-primary); padding: 0.5rem; background: var(--color-info-bg); border-bottom: 1px solid var(--color-border-light); }
.empty-state { text-align: center; padding: 2rem 1rem; }
.empty-state p { color: var(--color-text-secondary); }
.empty-state-title { font-size: 1.1rem; }
.empty-state-msg { padding: 1rem 0; }
.run-detail { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--color-border-light); }

/* --- Onboarding stepper --- */
.onboard-card { padding: 3rem 2rem; }
.onboard-title { color: var(--color-primary); margin-bottom: 1rem; }
.onboard-desc { font-size: 1.1rem; margin-bottom: 1.5rem; max-width: 500px; margin-left: auto; margin-right: auto; }
.onboard-steps { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-bottom: 1.5rem; }
.onboard-step { text-align: center; }
.onboard-step-number { font-size: 2rem; margin-bottom: 0.5rem; color: var(--color-primary); font-weight: 700; }
.btn-onboard { font-size: 1.1rem; padding: 0.75rem 2rem; }

/* --- Form error state --- */
.form-group.has-error input, .form-group.has-error select, .form-group.has-error textarea { border-color: var(--color-danger); }
.form-group .form-error { color: var(--color-danger); font-size: 0.8rem; margin-top: 0.25rem; display: none; }
.form-group.has-error .form-error { display: block; }

/* --- Site footer --- */
.site-footer { text-align: center; padding: 2rem 1.5rem 1.5rem; font-size: 0.85rem; color: var(--color-text-light); }
.site-footer a { color: var(--color-primary); text-decoration: none; margin: 0 0.5rem; }
.site-footer a:hover { text-decoration: underline; }

/* --- Error pages --- */
.error-page { padding: 3rem 2rem; }
.error-page h1 { font-size: 1.5rem; }
.justify-center { justify-content: center; }

/* --- Skeleton loading --- */
.skeleton { background: linear-gradient(90deg, var(--color-border-lighter) 25%, var(--color-border-light) 50%, var(--color-border-lighter) 75%); background-size: 200% 100%; animation: skeleton-pulse 1.5s ease-in-out infinite; border-radius: var(--radius-sm); }
.skeleton-line { height: 1rem; margin-bottom: 0.5rem; }
.skeleton-line:last-child { width: 60%; }
@keyframes skeleton-pulse { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* --- FAQ / Help --- */
.faq-item { border-bottom: 1px solid var(--color-border-light); padding: 1rem 0; }
.faq-item:last-child { border-bottom: none; }
.faq-item summary { font-weight: 600; cursor: pointer; color: var(--color-primary); font-size: 1.05rem; padding: 0.25rem 0; }
.faq-item summary:hover { color: var(--color-primary-hover); }
.faq-item p { margin-top: 0.75rem; color: var(--color-text-secondary); line-height: 1.6; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .grid-2 { gap: 1rem; }
    .gen-form { gap: 0.75rem; }
}
@media (max-width: 768px) {
    .grid-2 { grid-template-columns: 1fr; }
    .nav { flex-wrap: wrap; padding: 0.75rem 1rem; }
    .nav-toggle { display: block; }
    .nav-links { display: none; width: 100%; flex-direction: column; gap: 0; margin-top: 0.5rem; }
    .nav-links.open { display: flex; }
    .nav-links a { margin-left: 0; padding: 0.5rem 0; border-top: 1px solid var(--color-nav-divider); min-height: 44px; display: flex; align-items: center; }
    .container { padding: 0 1rem; margin: 1rem auto; }
    /* Form grid responsive */
    .form-grid-3, .form-grid-course, .form-grid-schedule { grid-template-columns: 1fr; }
    .form-grid-2 { grid-template-columns: 1fr; }
    /* Study Hub responsive */
    .gen-form { grid-template-columns: 1fr; }
    .customize-section.open { grid-template-columns: 1fr; }
    .hub-header { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
    .guide-card { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
    .guide-card > div:last-child { text-align: left; }
    .doc-browser { max-height: 60vh; }
    .file-checklist { max-height: none; }
    .admin-grid { grid-template-columns: 1fr; }
    /* Page header stacks on mobile */
    .page-header { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
    /* Guide view responsive */
    .guide-actions { width: 100%; }
    .guide-actions .btn-pdf { width: 100%; text-align: center; }
    /* Structural touch targets on mobile */
    .btn, .btn-sm { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; }
    .tab-btn { min-height: 44px; }
}

@media (max-width: 480px) {
    .container { padding: 0 0.75rem; }
    .card { padding: 1rem; }
    .guide-actions { flex-direction: column; width: 100%; }
    .guide-actions .btn { width: 100%; text-align: center; }
    .onboard-steps { flex-direction: column; }
}

/* Prevent iOS auto-zoom on input focus (requires >= 16px font-size) */
@media (max-width: 768px) {
    input, select, textarea { font-size: 16px; }
}

/* Touch device: bigger tap targets */
@media (pointer: coarse) {
    .btn { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; }
    .btn-sm { min-height: 44px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* Homework summary */
/* --- Homework list --- */
.homework-summary { }
.homework-day { margin-bottom: 1.25rem; }
.homework-day:last-child { margin-bottom: 0; }
.homework-day-header {
    display: flex; align-items: center; gap: 0.5rem;
    margin-bottom: 0.5rem; padding-bottom: 0.4rem;
    border-bottom: 2px solid var(--color-border-light);
}
.homework-day-name { font-weight: 700; font-size: 0.9rem; color: var(--color-text); }
.homework-day-today .homework-day-name { color: var(--color-primary); }
.homework-day-today .homework-day-header { border-bottom-color: var(--color-primary); }
.homework-day-tomorrow .homework-day-name { color: var(--color-warning); }
.homework-day-tomorrow .homework-day-header { border-bottom-color: var(--color-warning); }
.homework-day-overdue .homework-day-name { color: var(--color-danger); }
.homework-day-overdue .homework-day-header { border-bottom-color: var(--color-danger); }
.homework-day-count {
    background: var(--color-bg-subtle); color: var(--color-text-secondary); font-size: 0.7rem;
    font-weight: 600; padding: 0.1rem 0.45rem; border-radius: 10px;
}
.homework-item {
    padding: 0.4rem 0 0.4rem 0.75rem;
    border-left: 2px solid var(--color-border-lighter);
    margin-bottom: 0.25rem;
}
.homework-item:last-child { margin-bottom: 0; }
.homework-title {
    display: block; font-weight: 500; font-size: 0.9rem; color: var(--color-text);
    text-decoration: none; line-height: 1.3;
}
.homework-title:hover { text-decoration: underline; color: var(--color-primary); }
.homework-course-name {
    font-size: 0.75rem; color: var(--color-text-secondary); margin-top: 0.15rem;
}

/* --- Failed downloads card --- */
.alert-failed-downloads { border-left: 4px solid var(--color-warning); }
.text-warning { color: var(--color-badge-warning-text); }
.btn-warning {
    background: var(--color-badge-warning-bg); color: var(--color-badge-warning-text);
    border: 1px solid var(--color-badge-warning-text); border-radius: var(--radius-sm);
    padding: 0.25rem 0.75rem; font-size: 0.85rem; cursor: pointer; text-decoration: none;
}
.btn-warning:hover { background: var(--color-warning); color: #fff; }

/* --- Form validation --- */
.input-error { border-color: var(--color-danger) !important; box-shadow: 0 0 0 2px rgba(231,76,60,0.15); }
.text-danger { color: var(--color-danger); }

/* --- Generate drawer (secondary CTA) --- */
.generate-drawer { margin-top: 1rem; }
.generate-drawer-summary {
    cursor: pointer; color: var(--color-muted); font-size: 0.9rem;
    list-style: none; padding: 0.5rem 0; display: flex; align-items: center; gap: 0.4rem;
}
.generate-drawer-summary::-webkit-details-marker { display: none; }
.generate-drawer-summary::before {
    content: '\25B6'; font-size: 0.65rem; transition: transform 0.15s ease;
}
details[open] > .generate-drawer-summary::before { transform: rotate(90deg); }
.generate-drawer-summary:hover { color: var(--color-primary); }
.generate-drawer-body {
    padding: 1rem 0 0 0; border-top: 1px solid var(--color-border); margin-top: 0.5rem;
}
.btn-block { display: block; width: 100%; }

@media print {
    .nav, .guide-header .guide-actions, .back-link, .source-panel, .guide-footer { display: none; }
    .guide-content { box-shadow: none; padding: 0; }
}