/* ============================================
   DESIGN INSTRUCIONAL - Toolbox FRM
   Follows the ToolboxFRM design system
   ============================================ */

:root {
    --primary: #132190;
    --primary-hover: #0d1660;
    --primary-light: rgba(19, 33, 144, 0.1);
    --success: #10b981;
    --success-light: rgba(16, 185, 129, 0.1);
    --warning: #f59e0b;
    --warning-light: rgba(245, 158, 11, 0.1);
    --error: #ef4444;
    --error-light: rgba(239, 68, 68, 0.1);
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,.1), 0 8px 10px -6px rgba(0,0,0,.1);
    --transition: all 0.2s cubic-bezier(0.4,0,0.2,1);

    /* Resource type colors */
    --type-page: #132190;
    --type-page-light: rgba(19,33,144,.1);
    --type-quiz: #7c3aed;
    --type-quiz-light: rgba(124,58,237,.1);
    --type-forum: #059669;
    --type-forum-light: rgba(5,150,105,.1);
    --type-glossary: #0891b2;
    --type-glossary-light: rgba(8,145,178,.1);
    --type-assignment: #ea580c;
    --type-assignment-light: rgba(234,88,12,.1);
    --type-choice: #d97706;
    --type-choice-light: rgba(217,119,6,.1);
    --type-label: #6b7280;
    --type-label-light: rgba(107,114,128,.1);
}

* { margin:0; padding:0; box-sizing:border-box; }

.skip-link {
    position: fixed; top:0; left:0;
    background: var(--primary); color: white;
    padding: .75rem 1.5rem; z-index: 1001;
    font-weight: 600; text-decoration: none;
    border-radius: 0 0 var(--radius-sm) 0;
    transform: translateY(-100%);
    transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); outline: 3px solid var(--warning); outline-offset: 2px; }

.visually-hidden {
    position: absolute; width:1px; height:1px; padding:0;
    margin:-1px; overflow:hidden; clip:rect(0,0,0,0);
    white-space: nowrap; border:0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ec 100%);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* ---- Header ---- */
.header {
    text-align: center;
    margin-bottom: 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.back-link, .back-link:visited, .back-link:link {
    display: inline-flex; align-items: center; align-self: flex-start;
    gap: .5rem; color: var(--gray-500); text-decoration: none;
    font-size: .875rem; font-weight: 500; margin-bottom: 1.5rem;
    transition: var(--transition);
}
.back-link:hover { color: var(--primary); }

.header-icon {
    width: 64px; height: 64px;
    background: linear-gradient(135deg, #010451 0%, var(--primary) 100%);
    border-radius: var(--radius-lg);
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 1.5rem;
    box-shadow: var(--shadow-lg);
}
.header-icon svg { width:32px; height:32px; }

.header h1 {
    font-size: 2rem; font-weight: 700;
    color: var(--gray-900); margin-bottom: .5rem;
    letter-spacing: -.025em;
}
.header p { color: var(--gray-500); font-size: 1.05rem; }

/* ---- Steps ---- */
.steps-container { display: flex; flex-direction: column; gap: 1.5rem; }

.step {
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-100);
    transition: var(--transition);
}
.step:hover { box-shadow: var(--shadow-lg); }

.step-header {
    display: flex; align-items: center; gap: 1rem; margin-bottom: 1.25rem;
}

.step-number {
    width: 32px; height: 32px;
    background: var(--primary-light); color: var(--primary);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 600; font-size: .875rem; flex-shrink: 0;
}

.step-icon {
    width: 32px; height: 32px;
    background: var(--primary-light); color: var(--primary);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.step-icon svg { width:18px; height:18px; }

.step-title { font-size: 1.1rem; font-weight: 600; color: var(--gray-800); }
.step-description { font-size: .875rem; color: var(--gray-500); margin-left: auto; }
.required-mark { color: var(--error); font-weight: 700; margin-left: .2rem; }
.required-note { font-size: .8rem; color: var(--gray-500); margin-bottom: .5rem; }

/* ---- File Upload ---- */
.file-upload {
    position: relative;
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-md);
    padding: 2.5rem 1.5rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    background: var(--gray-50);
}
.file-upload:hover, .file-upload.dragover {
    border-color: var(--primary); background: var(--primary-light);
}
.file-upload.dragover { transform: scale(1.01); }
.file-upload:focus { outline: 3px solid var(--primary); outline-offset: 2px; border-color: var(--primary); background: var(--primary-light); }
.file-upload.has-file { border-color: var(--success); border-style: solid; background: var(--success-light); padding: 1.5rem; }
.file-upload.has-file:hover { border-color: var(--warning); background: var(--warning-light); }
.file-upload input { display: none; }

.file-upload-icon { width:56px; height:56px; margin: 0 auto 1rem; color: var(--gray-400); transition: var(--transition); }
.file-upload:hover .file-upload-icon, .file-upload.dragover .file-upload-icon { color: var(--primary); }
.file-upload.has-file .file-upload-icon { display: none; }

.file-upload-label { font-weight: 600; color: var(--gray-700); margin-bottom: .5rem; font-size: 1rem; }
.file-upload-hint { font-size: .875rem; color: var(--gray-600); }
.file-upload-status { margin-top: .75rem; font-size: .875rem; color: var(--success); font-weight: 500; }

/* ---- Scope Toggle ---- */
.scope-toggle {
    margin-top: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}
.scope-label {
    font-size: .875rem;
    font-weight: 600;
    color: var(--gray-700);
    white-space: nowrap;
}
.scope-options {
    display: flex;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--gray-50);
    transition: border-color .2s ease, box-shadow .2s ease;
}
.scope-toggle.unanswered .scope-options {
    border-color: var(--warning);
    box-shadow: 0 0 0 3px var(--warning-light);
}
.scope-option {
    display: flex;
    cursor: pointer;
}
.scope-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 1px;
    height: 1px;
    overflow: hidden;
}
.scope-option span {
    display: block;
    padding: .45rem 1.125rem;
    font-size: .875rem;
    font-weight: 500;
    color: var(--gray-600);
    transition: var(--transition);
    border-right: 1px solid var(--gray-200);
    user-select: none;
}
.scope-option:last-child span { border-right: none; }
.scope-option input[type="radio"]:checked + span {
    background: var(--primary);
    color: white;
    font-weight: 600;
}
.scope-option:has(input:not(:checked)) span:hover {
    background: var(--primary-light);
    color: var(--primary);
}
.scope-option input[type="radio"]:focus-visible + span {
    outline: 3px solid var(--primary);
    outline-offset: -3px;
    box-shadow: inset 0 0 0 2px white;
}

/* ---- Visual Config ---- */
.visual-config { display: flex; flex-direction: column; gap: 1.5rem; }

.colors-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.color-field { display: flex; flex-direction: column; gap: .5rem; }
.color-field label { font-size: .875rem; font-weight: 600; color: var(--gray-700); }

.color-input-group {
    display: flex; align-items: center; gap: .5rem;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    padding: .375rem .75rem;
    background: white;
    transition: var(--transition);
}
.color-input-group:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }

.color-input-group input[type="color"] {
    width: 28px; height: 28px;
    border: none; border-radius: var(--radius-sm);
    cursor: pointer; padding: 0; background: none;
    flex-shrink: 0;
    opacity: 0.3;
    transition: opacity var(--transition);
}
.color-input-group.has-color input[type="color"] { opacity: 1; }

.color-clear-btn {
    display: flex; align-items: center; justify-content: center;
    background: none; border: none; cursor: pointer;
    color: var(--gray-400); padding: .15rem;
    border-radius: 50%; flex-shrink: 0;
    transition: color var(--transition);
}
.color-clear-btn:hover { color: var(--error); }
.color-clear-btn.hidden { display: none; }
.color-input-group input[type="text"] {
    flex: 1; border: none; outline: none;
    font-size: .9rem; color: var(--gray-800);
    font-family: 'Courier New', monospace;
    background: transparent;
}


/* ---- Design System Panel ---- */
.ds-panel { margin-top: .25rem; }
.ds-divider {
    border: none; border-top: 1px solid var(--gray-200);
    margin: 1.5rem 0 1.25rem;
}
.ds-header { margin-bottom: 1.25rem; }
.ds-title { font-size: 1rem; font-weight: 600; color: var(--gray-800); margin-bottom: .375rem; }
.ds-desc { font-size: .875rem; color: var(--gray-500); line-height: 1.6; }

.ds-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}
.ds-upload-zone {
    display: flex;
    align-items: center;
    gap: .625rem;
    border: 1px dashed var(--gray-300);
    border-radius: var(--radius-sm);
    padding: .625rem 1rem;
    cursor: pointer;
    background: var(--gray-50);
    transition: var(--transition);
    flex-shrink: 0;
}
.ds-upload-zone:hover, .ds-upload-zone.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
    color: var(--primary);
}
.ds-upload-zone:focus { outline: 3px solid var(--primary); outline-offset: 2px; }
.ds-upload-zone input { display: none; }
.ds-upload-zone svg { flex-shrink: 0; color: var(--gray-400); }
.ds-upload-zone:hover svg, .ds-upload-zone.dragover svg { color: var(--primary); }
.ds-upload-label { font-size: .875rem; font-weight: 600; color: var(--gray-700); }
.ds-upload-hint { font-size: .8rem; color: var(--gray-400); }
.ds-or {
    font-size: .875rem; color: var(--gray-400);
    font-weight: 500; flex-shrink: 0;
}

.ds-loaded {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    background: var(--success-light);
    border: 1px solid var(--success);
    border-radius: var(--radius-sm);
    padding: .75rem 1rem;
    flex-wrap: wrap;
}
.ds-loaded-info {
    display: flex;
    align-items: center;
    gap: .5rem;
    color: var(--success);
    font-size: .9rem;
    font-weight: 600;
}
.ds-loaded-actions {
    display: flex;
    align-items: center;
    gap: .75rem;
}
.btn-text {
    background: none; border: none; cursor: pointer;
    font-size: .875rem; color: var(--gray-500);
    padding: .25rem .5rem; border-radius: var(--radius-sm);
    transition: var(--transition);
    font-family: inherit;
}
.btn-text:hover { color: var(--gray-700); background: var(--gray-100); }

.ds-status-msg {
    margin-top: .75rem;
    font-size: .875rem;
    color: var(--error);
    min-height: 1.25rem;
}

/* ---- DS Preview ---- */
.ds-preview { margin-top: 1.5rem; }
.ds-preview-title {
    font-size: .75rem;
    font-weight: 600;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: .75rem;
}
.ds-preview-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: .625rem;
}
@media (max-width: 540px) { .ds-preview-grid { grid-template-columns: 1fr; } }
.ds-preview-item {
    background: var(--surface);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: .875rem;
    overflow: hidden;
    min-width: 0;
}
.ds-preview-item--full { grid-column: 1 / -1; }
.ds-preview-item-label {
    display: block;
    font-size: .7rem;
    font-weight: 600;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: .5rem;
}
.ds-preview-item-content { font-size: .875rem; line-height: 1.5; overflow: hidden; }

/* ---- API Config ---- */
.api-config { display: flex; flex-direction: column; gap: 1rem; }

.provider-select {
    width: 100%;
    padding: .625rem .875rem;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius);
    background: white;
    font-size: .9375rem;
    color: var(--gray-800);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right .75rem center;
    padding-right: 2.5rem;
    transition: border-color var(--transition);
}
.provider-select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(19,33,144,.12); }

.input-group { display: flex; flex-direction: column; gap: .5rem; }
.input-group label { font-size: .875rem; font-weight: 600; color: var(--gray-700); }

.input-with-icon { position: relative; display: flex; align-items: center; }
.input-with-icon input {
    flex: 1; padding: .75rem 3rem .75rem 1rem;
    border: 1px solid var(--gray-200); border-radius: var(--radius-sm);
    font-size: .9rem; color: var(--gray-800); transition: var(--transition);
}
.input-with-icon input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }

.btn-icon {
    position: absolute; right: .5rem;
    background: none; border: none; cursor: pointer;
    padding: .5rem; color: var(--gray-400); transition: var(--transition);
}
.btn-icon:hover { color: var(--gray-600); }
.btn-icon svg { width:20px; height:20px; }

.input-hint { font-size: .75rem; color: var(--gray-600); }
.input-hint a { color: var(--primary); text-decoration: none; font-weight: 500; }
.input-hint a:hover { text-decoration: underline; }
.input-hint code { font-family: monospace; background: var(--gray-100); padding: .1rem .3rem; border-radius: 3px; font-size: .7rem; }

.checkbox-wrapper {
    display: flex; align-items: center; gap: .75rem;
    padding: .75rem 1rem; background: var(--gray-50); border-radius: var(--radius-sm);
}
.checkbox-wrapper input[type="checkbox"] { width:18px; height:18px; accent-color: var(--primary); cursor: pointer; }
.checkbox-wrapper label { font-size: .875rem; color: var(--gray-700); cursor: pointer; }

.warning-banner {
    display: flex; align-items: flex-start; gap: .75rem;
    padding: 1rem 1.25rem;
    background: var(--warning-light); border: 1px solid var(--warning);
    border-radius: var(--radius-md);
}
.warning-banner svg { width:20px; height:20px; color: var(--warning); flex-shrink:0; margin-top:.1rem; }
.warning-banner span { font-size: .875rem; color: var(--gray-700); }

/* ---- Buttons ---- */
.btn-primary {
    width: 100%; padding: 1rem 2rem;
    background: linear-gradient(135deg, #010451 0%, var(--primary) 100%);
    color: white; border: none; border-radius: var(--radius-md);
    font-size: 1rem; font-weight: 600; cursor: pointer;
    transition: var(--transition);
    display: flex; align-items: center; justify-content: center; gap: .5rem;
    box-shadow: 0 4px 14px rgba(19,33,144,.4);
}
.btn-primary:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(19,33,144,.5); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { background: var(--gray-300); cursor: not-allowed; box-shadow: none; }
.btn-primary:focus { outline: 3px solid var(--gray-900); outline-offset: 2px; }
.btn-primary svg { width:20px; height:20px; }

.btn-secondary {
    width: 100%; padding: 1rem 2rem;
    background: white; color: var(--gray-700);
    border: 2px solid var(--gray-300); border-radius: var(--radius-md);
    font-size: 1rem; font-weight: 600; cursor: pointer;
    transition: var(--transition);
    display: flex; align-items: center; justify-content: center; gap: .5rem;
}
.btn-secondary:hover { background: var(--gray-50); border-color: var(--gray-400); color: var(--gray-800); }
.btn-secondary:focus { outline: 3px solid var(--primary); outline-offset: 2px; }
.btn-secondary svg { width:20px; height:20px; }

.btn-sm {
    padding: .5rem 1rem;
    font-size: .875rem;
    width: auto;
}

.generate-hint { text-align: center; font-size: .875rem; color: var(--gray-500); margin-top: .75rem; }

/* ---- Course Overview ---- */
.course-overview {
    background: linear-gradient(135deg, #010451 0%, var(--primary) 100%) !important;
    color: white !important;
    border: none !important;
}
.course-overview:hover { box-shadow: var(--shadow-xl) !important; }

.course-badge {
    display: inline-flex; align-items: center;
    background: rgba(255,255,255,.15);
    color: white; font-size: .75rem; font-weight: 600;
    padding: .25rem .75rem; border-radius: 9999px;
    margin-bottom: 1rem; letter-spacing: .05em; text-transform: uppercase;
}

.course-title-display {
    font-size: 1.75rem; font-weight: 700; color: white;
    margin-bottom: .75rem; line-height: 1.25;
}

.course-description-display {
    font-size: 1rem; color: rgba(255,255,255,.85);
    margin-bottom: 1.25rem; line-height: 1.7;
}

.course-meta {
    display: flex; flex-wrap: wrap; gap: 1rem;
    margin-bottom: 1.5rem;
}

.meta-item {
    display: flex; align-items: center; gap: .375rem;
    font-size: .875rem; color: rgba(255,255,255,.8);
}
.meta-item svg { width:16px; height:16px; }

.learning-objectives h3 {
    font-size: .875rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: .1em; color: rgba(255,255,255,.6); margin-bottom: .75rem;
}

.learning-objectives ul { list-style: none; display: flex; flex-direction: column; gap: .5rem; }
.learning-objectives li {
    display: flex; align-items: flex-start; gap: .75rem;
    font-size: .9rem; color: rgba(255,255,255,.9); line-height: 1.5;
}
.learning-objectives li::before {
    content: '';
    width: 6px; height: 6px; background: var(--warning);
    border-radius: 50%; flex-shrink: 0; margin-top: .45rem;
}

/* ---- Course Explorer ---- */
#courseStructureSection {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.course-explorer {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 1.5rem;
}

.course-tree-panel {
    padding: 1.25rem !important;
}

.tree-sticky-inner {
    position: sticky;
    top: 1rem;
    max-height: calc(100vh - 4rem);
    overflow-y: auto;
}

.resource-detail-panel { padding: 1.5rem !important; min-height: 400px; }

.panel-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 1.25rem; padding-bottom: .75rem;
    border-bottom: 1px solid var(--gray-200);
}
.panel-title { font-size: 1rem; font-weight: 700; color: var(--gray-800); }
.panel-hint { font-size: .75rem; color: var(--gray-500); }

/* ---- Course Tree ---- */
.tree-topic { margin-bottom: .5rem; }

.tree-topic-btn {
    width: 100%; display: flex; align-items: center; gap: .625rem;
    padding: .625rem .75rem;
    background: var(--gray-50); border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm); cursor: pointer;
    transition: var(--transition); text-align: left;
}
.tree-topic-btn:hover { background: var(--primary-light); border-color: var(--primary); }
.tree-topic-btn:focus { outline: 2px solid var(--primary); outline-offset: 1px; }
.tree-topic-btn.open { background: var(--primary-light); border-color: var(--primary); }

.tree-chevron { width:14px; height:14px; color: var(--gray-400); flex-shrink:0; transition: transform .2s ease; }
.tree-chevron.open { transform: rotate(90deg); }

.topic-number {
    font-size: .7rem; font-weight: 700; color: var(--primary);
    background: var(--primary-light); border-radius: 4px;
    padding: .1rem .35rem; flex-shrink: 0;
}
.topic-title { font-size: .85rem; font-weight: 600; color: var(--gray-800); flex: 1; }
.topic-count { font-size: .7rem; color: var(--gray-500); flex-shrink: 0; }

.tree-topic-content { margin-left: 1.25rem; margin-top: .375rem; display: none; }
.tree-topic-content.open { display: block; }

.tree-subtopic { margin-bottom: .375rem; }

.tree-subtopic-btn {
    width: 100%; display: flex; align-items: center; gap: .5rem;
    padding: .5rem .625rem;
    background: transparent; border: 1px solid transparent;
    border-radius: var(--radius-sm); cursor: pointer;
    transition: var(--transition); text-align: left;
}
.tree-subtopic-btn:hover { background: var(--gray-50); border-color: var(--gray-200); }
.tree-subtopic-btn.open { background: var(--gray-50); border-color: var(--gray-200); }
.tree-subtopic-btn:focus { outline: 2px solid var(--primary); outline-offset: 1px; }

.subtopic-title { font-size: .8rem; font-weight: 500; color: var(--gray-700); flex:1; }

.tree-subtopic-content { margin-left: 1.25rem; margin-top: .25rem; display: none; }
.tree-subtopic-content.open { display: block; }

.tree-resource-btn {
    width: 100%; display: flex; align-items: center; gap: .5rem;
    padding: .45rem .625rem; margin-bottom: .25rem;
    background: transparent; border: 1px solid transparent;
    border-radius: var(--radius-sm); cursor: pointer;
    transition: var(--transition); text-align: left;
}
.tree-resource-btn:hover { background: var(--gray-50); border-color: var(--gray-200); }
.tree-resource-btn.active { background: var(--primary-light); border-color: var(--primary); }
.tree-resource-btn:focus { outline: 2px solid var(--primary); outline-offset: 1px; }

.resource-type-dot {
    width: 22px; height: 22px; border-radius: 6px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.resource-type-dot svg { width:12px; height:12px; }

.resource-name { font-size: .8rem; color: var(--gray-700); flex:1; line-height: 1.3; }
.tree-resource-btn.active .resource-name { color: var(--primary); font-weight: 500; }

.resource-status-dot {
    width: 8px; height: 8px; border-radius: 50%;
    flex-shrink: 0; background: var(--gray-300);
}
.resource-status-dot.done { background: var(--success); }
.resource-status-dot.generating { background: var(--warning); animation: pulse 1s infinite; }

@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:.4; } }

/* Resource type colors */
.type-page { background: var(--type-page-light); color: var(--type-page); }
.type-quiz { background: var(--type-quiz-light); color: var(--type-quiz); }
.type-forum { background: var(--type-forum-light); color: var(--type-forum); }
.type-glossary { background: var(--type-glossary-light); color: var(--type-glossary); }
.type-assignment { background: var(--type-assignment-light); color: var(--type-assignment); }
.type-choice { background: var(--type-choice-light); color: var(--type-choice); }
.type-label { background: var(--type-label-light); color: var(--type-label); }

/* ---- Resource Detail ---- */
.empty-state {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    padding: 3rem 2rem; text-align: center; gap: 1rem;
    color: var(--gray-400); min-height: 300px;
}
.empty-state svg { color: var(--gray-300); }
.empty-state p { font-size: .9rem; max-width: 260px; line-height: 1.6; }

.detail-type-tag {
    display: inline-flex; align-items: center; gap: .375rem;
    font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em;
    padding: .25rem .75rem; border-radius: 9999px;
    margin-bottom: 1rem;
}
.detail-type-tag svg { width:12px; height:12px; }

.detail-title {
    font-size: 1.35rem; font-weight: 700; color: var(--gray-900);
    margin-bottom: .75rem; line-height: 1.3;
}

.detail-summary { font-size: .9rem; color: var(--gray-600); line-height: 1.7; margin-bottom: 1rem; }

.detail-justification {
    display: flex; align-items: flex-start; gap: .75rem;
    padding: .875rem 1rem;
    background: var(--primary-light); border-radius: var(--radius-md);
    font-size: .85rem; color: var(--primary); line-height: 1.6;
    margin-bottom: 1.5rem;
}
.detail-justification svg { width:16px; height:16px; flex-shrink:0; margin-top:.2rem; }

.generate-resource-btn {
    width: 100%; padding: .875rem 1.5rem;
    background: linear-gradient(135deg, #010451 0%, var(--primary) 100%);
    color: white; border: none; border-radius: var(--radius-md);
    font-size: .9375rem; font-weight: 600; cursor: pointer;
    transition: var(--transition);
    display: flex; align-items: center; justify-content: center; gap: .5rem;
    box-shadow: 0 4px 14px rgba(19,33,144,.35);
    margin-bottom: 1.5rem;
}
.generate-resource-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(19,33,144,.45); }
.generate-resource-btn:disabled { background: var(--gray-300); cursor: not-allowed; box-shadow: none; transform: none; }
.generate-resource-btn svg { width:18px; height:18px; }

/* ---- Generated Page Content ---- */
.page-sections { display: flex; flex-direction: column; gap: 1.25rem; }

.page-section-item {
    border: 1px solid var(--gray-200); border-radius: var(--radius-md); overflow: hidden;
}

.page-section-header {
    display: flex; align-items: center; gap: .75rem;
    padding: .75rem 1rem;
    background: var(--gray-50); border-bottom: 1px solid var(--gray-200);
}

.section-type-tag {
    font-size: .7rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em;
    padding: .2rem .625rem; border-radius: 9999px;
}
.section-type-html { background: var(--type-page-light); color: var(--type-page); }
.section-type-image { background: var(--type-quiz-light); color: var(--type-quiz); }

.section-copy-btn {
    margin-left: auto;
    padding: .3rem .75rem;
    background: white; color: var(--gray-600);
    border: 1px solid var(--gray-200); border-radius: var(--radius-sm);
    font-size: .75rem; font-weight: 500; cursor: pointer;
    transition: var(--transition);
    display: flex; align-items: center; gap: .375rem;
}
.section-copy-btn:hover { background: var(--primary); color: white; border-color: var(--primary); }
.section-copy-btn svg { width:13px; height:13px; }

/* HTML Code Block */
.code-preview {
    position: relative;
    background: #1e1e2e;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    overflow: hidden;
}
.code-preview pre {
    padding: 1rem;
    font-family: 'Courier New', 'Monaco', monospace;
    font-size: .78rem; line-height: 1.6;
    color: #cdd6f4;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 320px;
    overflow-y: auto;
}

/* HTML Preview */
.html-preview-container {
    border: 1px solid var(--gray-200); border-radius: var(--radius-md);
    overflow: hidden; margin-bottom: .75rem;
}
.html-preview-label {
    font-size: .75rem; font-weight: 600; color: var(--gray-500);
    padding: .375rem .75rem; background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200); text-transform: uppercase; letter-spacing: .05em;
}
.html-preview-frame {
    width: 100%; border: none; min-height: 240px;
    display: block; background: white;
}

/* Image Prompt Box */
.image-prompt-box {
    background: #faf5ff; border: 1px solid #d8b4fe;
    border-radius: var(--radius-md); padding: 1rem;
}
.image-prompt-header {
    display: flex; align-items: center; gap: .5rem; margin-bottom: .75rem;
}
.image-prompt-header svg { width:16px; height:16px; color: #7c3aed; }
.image-prompt-title { font-size: .875rem; font-weight: 600; color: #5b21b6; }
.image-prompt-purpose { font-size: .8rem; color: #6d28d9; margin-bottom: .625rem; }
.image-prompt-text {
    background: white; border: 1px solid #d8b4fe; border-radius: var(--radius-sm);
    padding: .625rem .875rem; font-size: .825rem; color: var(--gray-700);
    line-height: 1.6; margin-bottom: .625rem;
}
.image-prompt-alt { font-size: .75rem; color: var(--gray-500); margin-bottom: .75rem; }
.image-prompt-copy {
    display: flex; align-items: center; gap: .375rem;
    padding: .4rem .875rem;
    background: #7c3aed; color: white;
    border: none; border-radius: var(--radius-sm);
    font-size: .8rem; font-weight: 500; cursor: pointer;
    transition: var(--transition);
}
.image-prompt-copy:hover { background: #6d28d9; }
.image-prompt-copy svg { width:13px; height:13px; }

/* ---- Quiz ---- */
.quiz-intro {
    background: var(--success-light);
    border-left: 3px solid var(--success);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: .875rem 1.125rem;
    font-size: .9375rem;
    color: var(--gray-700);
    line-height: 1.65;
    margin-bottom: 1.25rem;
}

.quiz-questions { display: flex; flex-direction: column; gap: 1.5rem; }

.quiz-question-item {
    border: 1px solid var(--gray-200); border-radius: var(--radius-md); overflow: hidden;
}
.quiz-question-header {
    display: flex; align-items: center; gap: .75rem;
    padding: .875rem 1rem; background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}
.question-number {
    font-size: .75rem; font-weight: 700;
    background: var(--primary); color: white;
    padding: .15rem .5rem; border-radius: 4px;
    flex-shrink: 0;
}
.question-type-tag {
    font-size: .7rem; color: var(--gray-500);
    background: var(--gray-200); padding: .15rem .5rem; border-radius: 4px;
}
.quiz-question-body { padding: 1rem; }
.question-text { font-size: .9375rem; color: var(--gray-800); margin-bottom: .875rem; line-height: 1.6; font-weight: 500; }
.question-options { display: flex; flex-direction: column; gap: .5rem; margin-bottom: 1rem; }
.question-option {
    display: flex; flex-direction: column;
    padding: .625rem .875rem;
    border: 1px solid var(--gray-200); border-radius: var(--radius-sm);
    font-size: .875rem; color: var(--gray-700);
}
.question-option.correct {
    background: var(--success-light); border-color: var(--success); color: var(--gray-800); font-weight: 500;
}
.option-content { display: flex; align-items: center; gap: .75rem; }
.option-feedback {
    margin-top: .4rem; padding: .375rem .5rem .375rem 2rem;
    font-size: .8125rem; line-height: 1.5; border-radius: var(--radius-sm);
}
.option-feedback--correct {
    color: var(--success); background: transparent;
}
.option-feedback--incorrect {
    color: var(--gray-500); background: transparent;
}
.option-marker {
    width: 22px; height: 22px; border-radius: 50%; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    font-size: .7rem; font-weight: 700;
    background: var(--gray-100); color: var(--gray-600); border: 1.5px solid var(--gray-300);
}
.question-option.correct .option-marker { background: var(--success); color: white; border-color: var(--success); }

.question-feedback {
    display: flex; align-items: flex-start; gap: .625rem;
    padding: .75rem .875rem;
    background: var(--warning-light); border: 1px solid var(--warning); border-radius: var(--radius-md);
    font-size: .875rem; color: var(--gray-700); line-height: 1.6;
}
.question-feedback svg { width:16px; height:16px; color: var(--warning); flex-shrink:0; margin-top:.15rem; }

/* ---- Forum, Glossary, Assignment, Choice ---- */
.forum-detail, .assignment-detail, .choice-detail { display: flex; flex-direction: column; gap: 1rem; }
.detail-section-title { font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--gray-500); margin-bottom: .5rem; }
.detail-content-box {
    padding: 1rem 1.25rem; background: var(--gray-50);
    border: 1px solid var(--gray-200); border-radius: var(--radius-md);
    font-size: .9rem; color: var(--gray-700); line-height: 1.7;
}
.glossary-table { width: 100%; border-collapse: collapse; font-size: .875rem; }
.glossary-table th {
    text-align: left; padding: .625rem .875rem;
    background: var(--primary); color: white; font-size: .8rem;
}
.glossary-table td { padding: .625rem .875rem; border-bottom: 1px solid var(--gray-200); color: var(--gray-700); vertical-align: top; }
.glossary-table tr:hover td { background: var(--gray-50); }
.glossary-term { font-weight: 600; color: var(--gray-800); }

.choice-option-item {
    padding: .625rem .875rem;
    border: 1px solid var(--gray-200); border-radius: var(--radius-sm);
    font-size: .875rem; color: var(--gray-700);
}
.criteria-list { list-style: none; display: flex; flex-direction: column; gap: .375rem; }
.criteria-list li {
    padding: .5rem .875rem; background: var(--gray-50);
    border: 1px solid var(--gray-200); border-radius: var(--radius-sm);
    font-size: .875rem; color: var(--gray-700);
    display: flex; align-items: flex-start; gap: .5rem;
}
.criteria-list li::before { content: '✓'; color: var(--success); font-weight: 700; flex-shrink: 0; }

/* ---- Export ---- */
.export-description { font-size: .9rem; color: var(--gray-600); margin-bottom: 1.25rem; line-height: 1.6; }
.export-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* ---- Loading / Toast ---- */
.loading-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(255,255,255,.92); backdrop-filter: blur(4px);
    z-index: 1000; flex-direction: column;
    align-items: center; justify-content: center; gap: 1.25rem;
}
.loading-overlay.visible { display: flex; }

.spinner {
    width: 48px; height: 48px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-text { font-size: 1.05rem; color: var(--gray-800); font-weight: 600; }
.loading-sub { font-size: .875rem; color: var(--gray-500); }

.hidden { display: none !important; }

.toast {
    position: fixed; bottom: 2rem; right: 2rem;
    background: var(--gray-900); color: white;
    padding: 1rem 1.5rem; border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    display: flex; align-items: center; gap: .75rem;
    opacity: 0; transform: translateY(1rem);
    transition: all .3s cubic-bezier(0.4,0,0.2,1);
    pointer-events: none; z-index: 1001; max-width: 380px;
}
.toast.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.toast.error { background: var(--error); }
.toast svg { width:20px; height:20px; color: var(--success); flex-shrink:0; }
.toast.error svg { color: white; }
.toast-message { font-size: .875rem; font-weight: 500; }

.footer-note { text-align: center; color: var(--gray-500); font-size: .875rem; margin-top: 2rem; padding: 0 1rem; }

/* ---- Responsive ---- */
@media (max-width: 900px) {
    .course-explorer { grid-template-columns: 1fr; }
    .tree-sticky-inner { position: relative; top: 0; max-height: none; }
}

@media (max-width: 640px) {
    .app-container { padding: 1rem; }
    .header h1 { font-size: 1.5rem; }
    .step { padding: 1.25rem; }
    .colors-row { grid-template-columns: 1fr; }
    .export-actions { grid-template-columns: 1fr; }
    .toast { bottom: 1rem; right: 1rem; left: 1rem; max-width: calc(100% - 2rem); }
}