/* =============================================================
   AI-läraren – Style
   Rent, pedagogiskt tema: vitt/ljusblått med lila AI-accenter
   Skolplus AB
   ============================================================= */

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

:root {
    --primary:      #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light:#dbeafe;
    --ai-purple:    #7c3aed;
    --ai-light:     #ede9fe;
    --success:      #059669;
    --success-light:#d1fae5;
    --warning:      #d97706;
    --warning-light:#fef3c7;
    --danger:       #dc2626;
    --danger-light: #fee2e2;
    --gray-50:      #f8fafc;
    --gray-100:     #f1f5f9;
    --gray-200:     #e2e8f0;
    --gray-400:     #94a3b8;
    --gray-600:     #475569;
    --gray-800:     #1e293b;
    --white:        #ffffff;

    --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
    --shadow:    0 4px 12px rgba(0,0,0,.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,.12);
    --radius:    16px;
    --radius-sm: 8px;
    --transition:.22s ease;
}

/* ---------- Scroll & body ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--gray-100); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    min-height: 100vh;
}

/* ---------- Header ---------- */
.ai-header {
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 60%, #4338ca 100%);
    color: white;
    padding: 32px 0 24px;
}
.ai-header .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.ai-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}
.ai-logo {
    display: flex;
    align-items: center;
    gap: 14px;
}
.ai-logo-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #7c3aed, #a855f7);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    box-shadow: 0 4px 14px rgba(124,58,237,.5);
}
.ai-logo h1 { font-size: 1.7rem; font-weight: 800; line-height: 1.1; }
.ai-logo p  { font-size: .85rem; color: rgba(255,255,255,.65); margin-top: 2px; }
.ai-header-badges {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.ai-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,.12);
    border: 1px solid rgba(255,255,255,.2);
    border-radius: 20px;
    padding: 5px 12px;
    font-size: .78rem;
    font-weight: 600;
    color: rgba(255,255,255,.9);
    backdrop-filter: blur(4px);
}

/* ---------- Layout ---------- */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 28px 20px 60px;
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 24px;
    align-items: start;
}
@media (max-width: 900px) {
    .main-container { grid-template-columns: 1fr; }
}

/* ---------- Konfigurationspanel (vänster) ---------- */
.config-panel {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    position: sticky;
    top: 16px;
}
.config-panel-header {
    background: linear-gradient(135deg, var(--primary), var(--ai-purple));
    color: white;
    padding: 18px 20px;
}
.config-panel-header h2 {
    font-size: 1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}
.config-panel-body { padding: 20px; }

.form-group { margin-bottom: 16px; }
.form-label {
    display: block;
    font-size: .8rem;
    font-weight: 700;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: .5px;
    margin-bottom: 6px;
}
.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-size: .92rem;
    color: var(--gray-800);
    background: var(--white);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}
.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,.15);
}

/* Svårighetsgrad-radio-knappar */
.difficulty-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
}
.diff-btn {
    padding: 8px 4px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-sm);
    background: var(--white);
    cursor: pointer;
    text-align: center;
    font-size: .78rem;
    font-weight: 700;
    color: var(--gray-600);
    transition: all var(--transition);
}
.diff-btn:hover { border-color: var(--primary); color: var(--primary); }
.diff-btn.active-easy   { border-color: var(--success); background: var(--success-light); color: var(--success); }
.diff-btn.active-medium { border-color: var(--warning); background: var(--warning-light); color: var(--warning); }
.diff-btn.active-hard   { border-color: var(--danger);  background: var(--danger-light);  color: var(--danger); }

.count-selector {
    display: flex;
    align-items: center;
    gap: 10px;
}
.count-selector input[type=range] {
    flex: 1;
    accent-color: var(--primary);
}
.count-selector .count-val {
    min-width: 28px;
    text-align: center;
    font-weight: 700;
    color: var(--primary);
}

.btn-generate {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary), var(--ai-purple));
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all var(--transition);
    box-shadow: var(--shadow);
    margin-top: 6px;
}
.btn-generate:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-generate:disabled { opacity: .6; cursor: not-allowed; transform: none; }

/* Frågbank-sektion i panelen */
.bank-section { margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--gray-200); }
.bank-section h3 { font-size: .85rem; font-weight: 700; color: var(--gray-600); margin-bottom: 10px; }
.bank-entry {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 10px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
    font-size: .8rem;
    cursor: pointer;
    transition: all var(--transition);
}
.bank-entry:hover { border-color: var(--primary); background: var(--primary-light); }
.bank-entry .be-title { font-weight: 600; color: var(--gray-800); }
.bank-entry .be-meta  { color: var(--gray-400); font-size: .72rem; }
.bank-entry .be-del   { color: var(--danger); cursor: pointer; padding: 2px 6px; }

/* ---------- Resultatpanel (höger) ---------- */
.result-panel { min-height: 300px; }

/* Setup-skärm (API-nyckel saknas) */
.setup-screen {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 40px 32px;
    text-align: center;
    box-shadow: var(--shadow);
}
.setup-screen .setup-icon { font-size: 4rem; margin-bottom: 16px; }
.setup-screen h2 { font-size: 1.4rem; font-weight: 800; margin-bottom: 8px; }
.setup-screen p  { color: var(--gray-600); max-width: 500px; margin: 0 auto 20px; line-height: 1.6; }

.setup-steps {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    padding: 20px;
    text-align: left;
    max-width: 500px;
    margin: 0 auto 24px;
}
.setup-steps h3 { font-size: .85rem; font-weight: 700; text-transform: uppercase; color: var(--gray-600); margin-bottom: 12px; }
.setup-step {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
    font-size: .88rem;
}
.setup-step .step-num {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    font-weight: 700;
    font-size: .75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.setup-step .step-text { color: var(--gray-600); line-height: 1.5; }
.setup-step code {
    background: var(--gray-100);
    padding: 1px 6px;
    border-radius: 4px;
    font-size: .82rem;
    color: var(--ai-purple);
    font-family: 'Courier New', monospace;
}

/* Tom-skärm */
.empty-screen {
    background: var(--white);
    border: 1px dashed var(--gray-200);
    border-radius: var(--radius);
    padding: 60px 32px;
    text-align: center;
    color: var(--gray-400);
}
.empty-screen .empty-icon { font-size: 4rem; margin-bottom: 16px; opacity: .6; }
.empty-screen h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; color: var(--gray-600); }

/* Laddning */
.loading-screen {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 60px 32px;
    text-align: center;
    box-shadow: var(--shadow);
}
.ai-spinner {
    width: 64px;
    height: 64px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--ai-purple);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-screen h3 { font-size: 1.1rem; font-weight: 700; color: var(--gray-800); margin-bottom: 6px; }
.loading-screen p  { color: var(--gray-400); font-size: .9rem; }
.loading-steps { display: flex; flex-direction: column; gap: 8px; margin: 20px auto 0; max-width: 300px; text-align: left; }
.loading-step {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: .85rem;
    color: var(--gray-400);
    transition: color var(--transition);
}
.loading-step.done  { color: var(--success); }
.loading-step.active{ color: var(--primary); font-weight: 600; }
.loading-step .ls-icon { font-size: 1rem; }

/* ---------- Resultat-metabar ---------- */
.result-meta-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 14px 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
}
.result-meta-bar .meta-info { display: flex; gap: 16px; flex-wrap: wrap; }
.meta-chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: .8rem;
    font-weight: 600;
    color: var(--gray-600);
}
.meta-chip span { color: var(--primary); }
.result-actions { display: flex; gap: 8px; }

/* ---------- Övnings-kort ---------- */
.exercise-card {
    background: var(--white);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius);
    margin-bottom: 14px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: box-shadow var(--transition), border-color var(--transition);
}
.exercise-card:hover { box-shadow: var(--shadow); }
.exercise-card.answered-correct { border-color: var(--success); }
.exercise-card.answered-wrong   { border-color: var(--danger); }

.exercise-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 18px;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}
.exercise-num {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: .9rem;
    color: var(--gray-800);
}
.exercise-num .num-badge {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    font-size: .8rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
}
.exercise-header-actions { display: flex; gap: 6px; }

.exercise-body { padding: 20px 18px 16px; }
.exercise-question {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-800);
    line-height: 1.5;
    margin-bottom: 16px;
}

/* Svarsalternativ */
.options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 14px;
}
@media (max-width: 600px) {
    .options-grid { grid-template-columns: 1fr; }
}

.option-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-sm);
    background: var(--white);
    cursor: pointer;
    font-size: .88rem;
    font-weight: 500;
    color: var(--gray-800);
    text-align: left;
    transition: all var(--transition);
    line-height: 1.4;
}
.option-btn .opt-letter {
    min-width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--gray-100);
    color: var(--gray-600);
    font-weight: 800;
    font-size: .78rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.option-btn:hover:not(:disabled) {
    border-color: var(--primary);
    background: var(--primary-light);
}
.option-btn.selected-correct {
    border-color: var(--success);
    background: var(--success-light);
}
.option-btn.selected-correct .opt-letter {
    background: var(--success);
    color: white;
}
.option-btn.selected-wrong {
    border-color: var(--danger);
    background: var(--danger-light);
}
.option-btn.selected-wrong .opt-letter {
    background: var(--danger);
    color: white;
}
.option-btn.reveal-correct {
    border-color: var(--success);
    background: var(--success-light);
    opacity: .85;
}
.option-btn.reveal-correct .opt-letter {
    background: var(--success);
    color: white;
}
.option-btn:disabled { cursor: default; }

/* Hint-rad */
.hint-bar {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    background: var(--warning-light);
    border: 1px solid #fde68a;
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    font-size: .82rem;
    color: #92400e;
    margin-bottom: 10px;
    display: none;
}
.hint-bar.visible { display: flex; }

/* Förklaring */
.explanation-box {
    background: var(--primary-light);
    border: 1px solid #bfdbfe;
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    font-size: .88rem;
    color: #1e3a8a;
    line-height: 1.5;
    display: none;
}
.explanation-box.visible { display: block; animation: fadeInDown .3s ease; }
.explanation-box .expl-title {
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 6px;
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Kortets knappar */
.card-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 18px;
    border-top: 1px solid var(--gray-200);
    background: var(--gray-50);
    flex-wrap: wrap;
    gap: 6px;
}
.card-action-left, .card-action-right { display: flex; gap: 6px; flex-wrap: wrap; }

/* ---------- Knappar (generella) ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 7px 14px;
    border: 1.5px solid transparent;
    border-radius: var(--radius-sm);
    font-size: .8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}
.btn:disabled { opacity: .5; cursor: not-allowed; }

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

.btn-outline {
    background: transparent;
    border-color: var(--gray-200);
    color: var(--gray-600);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }

.btn-success-sm {
    background: var(--success);
    color: white;
}
.btn-success-sm:hover { opacity: .9; }

.btn-danger-sm {
    background: transparent;
    border-color: var(--danger);
    color: var(--danger);
}
.btn-danger-sm:hover { background: var(--danger); color: white; }

.btn-purple {
    background: var(--ai-purple);
    color: white;
}
.btn-purple:hover { opacity: .9; }

.btn-lg {
    padding: 11px 22px;
    font-size: .9rem;
}

/* ---------- Facit/Resultat-vy ---------- */
.facit-bar {
    display: none;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
}
.facit-bar.visible { display: block; }
.facit-bar h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.facit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 8px;
}
.facit-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: .82rem;
    padding: 6px 10px;
    background: var(--gray-50);
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
}
.facit-item .fi-num { font-weight: 700; color: var(--primary); min-width: 20px; }
.facit-item .fi-ans { color: var(--success); font-weight: 600; flex: 1; }

/* ---------- Score-banner ---------- */
.score-banner {
    display: none;
    background: linear-gradient(135deg, var(--primary), var(--ai-purple));
    color: white;
    border-radius: var(--radius);
    padding: 24px 28px;
    margin-bottom: 16px;
    text-align: center;
}
.score-banner.visible { display: block; animation: fadeInDown .4s ease; }
.score-banner h2 { font-size: 1.5rem; margin-bottom: 6px; }
.score-banner .score-num { font-size: 3rem; font-weight: 900; }
.score-meta { display: flex; justify-content: center; gap: 24px; margin-top: 12px; flex-wrap: wrap; }
.score-meta-item { text-align: center; }
.score-meta-item .sm-val { font-size: 1.4rem; font-weight: 800; }
.score-meta-item .sm-label { font-size: .75rem; opacity: .8; }

/* ---------- Rapport-modal ---------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(4px);
    animation: fadeIn .2s ease;
}
.modal-overlay.hidden { display: none; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal {
    background: white;
    border-radius: var(--radius);
    padding: 28px;
    max-width: 480px;
    width: 100%;
    box-shadow: 0 20px 50px rgba(0,0,0,.2);
    animation: slideUp .3s ease;
}
@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to   { transform: translateY(0);    opacity: 1; }
}
.modal h2 { font-size: 1.2rem; font-weight: 800; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.modal p  { color: var(--gray-600); font-size: .9rem; margin-bottom: 16px; }

.report-reasons { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-bottom: 12px; }
.reason-btn {
    padding: 8px 10px;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-sm);
    background: white;
    cursor: pointer;
    font-size: .8rem;
    font-weight: 600;
    color: var(--gray-600);
    transition: all var(--transition);
    text-align: left;
}
.reason-btn.selected { border-color: var(--danger); background: var(--danger-light); color: var(--danger); }
.reason-btn:hover { border-color: var(--danger); }

.modal textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-size: .88rem;
    resize: vertical;
    min-height: 80px;
    outline: none;
    font-family: inherit;
}
.modal textarea:focus { border-color: var(--primary); }

/* ---------- Toast-notifieringar ---------- */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: 10px;
    padding: 12px 16px;
    font-size: .88rem;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    animation: toastIn .3s ease;
    max-width: 320px;
}
@keyframes toastIn {
    from { transform: translateX(40px); opacity: 0; }
    to   { transform: translateX(0);    opacity: 1; }
}
.toast.success { border-left: 4px solid var(--success); }
.toast.error   { border-left: 4px solid var(--danger);  }
.toast.info    { border-left: 4px solid var(--primary);  }

/* ---------- Validerings-badge ---------- */
.validation-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: .7rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 10px;
    text-transform: uppercase;
    letter-spacing: .4px;
}
.vb-passed { background: var(--success-light); color: var(--success); }
.vb-ai     { background: var(--ai-light);      color: var(--ai-purple); }

/* ---------- Export-knappar ---------- */
.export-bar {
    display: none;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 16px;
}
.export-bar.visible { display: flex; }

/* ---------- Progress-bar (fråge-framsteg) ---------- */
.progress-bar-wrap { height: 6px; background: var(--gray-200); border-radius: 3px; margin-bottom: 16px; overflow: hidden; }
.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--ai-purple));
    border-radius: 3px;
    transition: width .4s ease;
}

/* ---------- Utilities ---------- */
.hidden { display: none !important; }
.text-muted { color: var(--gray-400); }
.gap-8 { gap: 8px; }

/* ---------- Responsivt ---------- */
@media (max-width: 600px) {
    .ai-header { padding: 20px 0 16px; }
    .ai-logo h1 { font-size: 1.3rem; }
    .result-meta-bar { flex-direction: column; align-items: flex-start; }
    .score-banner .score-num { font-size: 2.2rem; }
}