/* =========================================================================
   Salesforce Dictionary - Certification Study Mode Styles
   ========================================================================= */

/* ── Hero ──────────────────────────────────────────────────────────────── */

.sf-cs__hero {
    background: linear-gradient(135deg, var(--sf-brand-dark) 0%, #1a3a6b 55%, #0d5bbd 100%);
    color: var(--sf-text-inverse);
    padding: 48px 24px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.sf-cs__hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2300A1E0' fill-opacity='0.06'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 1;
    pointer-events: none;
}
.sf-cs__hero > * { position: relative; z-index: 1; }
.sf-cs__hero h1 { font-size: 32px; font-weight: 700; margin: 0 0 8px; }
.sf-cs__hero p { font-size: 16px; margin: 0; opacity: 0.85; }

/* ── Container ────────────────────────────────────────────────────────── */

.sf-cs__container {
    max-width: var(--sf-max-width);
    margin: 0 auto;
    padding: 32px 24px 48px;
}

/* ── Certification Picker ─────────────────────────────────────────────── */

.sf-cs__picker {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.sf-cs__cert-card {
    background: var(--sf-bg-card);
    border: 2px solid var(--sf-border-color);
    border-radius: var(--sf-border-radius);
    padding: 24px;
    cursor: pointer;
    transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
    text-align: center;
}
.sf-cs__cert-card:hover {
    box-shadow: var(--sf-shadow-card-hover);
    transform: translateY(-2px);
}
.sf-cs__cert-card.active {
    border-color: var(--sf-brand-primary);
    box-shadow: 0 0 0 3px rgba(1, 118, 211, 0.15);
}
.sf-cs__cert-icon {
    font-size: 40px;
    margin-bottom: 10px;
    display: block;
}
.sf-cs__cert-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--sf-text-primary);
    margin: 0 0 4px;
}
.sf-cs__cert-count {
    font-size: 13px;
    color: var(--sf-text-tertiary);
}
.sf-cs__cert-badge {
    display: inline-block;
    margin-top: 10px;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    color: white;
}

/* ── Study Dashboard ──────────────────────────────────────────────────── */

.sf-cs__dashboard {
    display: none;
}
.sf-cs__dashboard.active { display: block; }

.sf-cs__dash-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 24px;
}
.sf-cs__dash-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--sf-text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}
.sf-cs__back-btn {
    background: none;
    border: 1px solid var(--sf-border-color);
    border-radius: 20px;
    padding: 6px 18px;
    font-size: 13px;
    font-weight: 600;
    color: var(--sf-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}
.sf-cs__back-btn:hover { background: var(--sf-brand-light); color: var(--sf-brand-primary); }

/* Stats row */
.sf-cs__stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}
.sf-cs__stat {
    background: var(--sf-bg-card);
    border: 1px solid var(--sf-border-color);
    border-radius: var(--sf-border-radius-sm);
    padding: 16px;
    text-align: center;
}
.sf-cs__stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--sf-brand-primary);
}
.sf-cs__stat-label {
    font-size: 12px;
    color: var(--sf-text-tertiary);
    margin-top: 2px;
}

/* Mode selector tabs */
.sf-cs__modes {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}
.sf-cs__mode-btn {
    padding: 10px 24px;
    border-radius: 20px;
    border: 1.5px solid var(--sf-border-color);
    background: var(--sf-bg-card);
    font-size: 14px;
    font-weight: 600;
    color: var(--sf-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}
.sf-cs__mode-btn:hover { border-color: var(--sf-brand-primary); color: var(--sf-brand-primary); }
.sf-cs__mode-btn.active {
    background: var(--sf-brand-primary);
    color: white;
    border-color: var(--sf-brand-primary);
}

/* ── Flashcard Area ───────────────────────────────────────────────────── */

.sf-cs__flashcard-area {
    display: none;
}
.sf-cs__flashcard-area.active { display: block; }

.sf-cs__flashcard-counter {
    text-align: center;
    font-size: 14px;
    color: var(--sf-text-tertiary);
    margin-bottom: 16px;
    font-weight: 600;
}

.sf-cs__flashcard-wrapper {
    perspective: 1000px;
    max-width: 640px;
    margin: 0 auto 24px;
}

.sf-cs__flashcard {
    position: relative;
    width: 100%;
    min-height: 300px;
    cursor: pointer;
    transform-style: preserve-3d;
    transition: transform 0.5s ease;
}
.sf-cs__flashcard.flipped {
    transform: rotateY(180deg);
}

.sf-cs__flashcard-face {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: var(--sf-border-radius);
    border: 1px solid var(--sf-border-color);
    padding: 40px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.sf-cs__flashcard-front {
    background: var(--sf-bg-card);
}
.sf-cs__flashcard-back {
    background: var(--sf-brand-light);
    transform: rotateY(180deg);
}

.sf-cs__flashcard-label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--sf-text-tertiary);
    margin-bottom: 16px;
}
.sf-cs__flashcard-term {
    font-size: 28px;
    font-weight: 700;
    color: var(--sf-text-primary);
}
.sf-cs__flashcard-category {
    margin-top: 12px;
    padding: 4px 14px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    background: var(--sf-brand-primary);
    color: white;
}
.sf-cs__flashcard-def {
    font-size: 15px;
    line-height: 1.6;
    color: var(--sf-text-primary);
    max-width: 540px;
    max-height: 200px;
    overflow-y: auto;
}
.sf-cs__flashcard-hint {
    margin-top: 16px;
    font-size: 12px;
    color: var(--sf-text-tertiary);
    font-style: italic;
}

.sf-cs__flashcard-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    max-width: 640px;
    margin: 0 auto 16px;
}
.sf-cs__nav-btn {
    padding: 10px 28px;
    border-radius: 20px;
    border: 1.5px solid var(--sf-border-color);
    background: var(--sf-bg-card);
    font-size: 14px;
    font-weight: 600;
    color: var(--sf-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}
.sf-cs__nav-btn:hover { border-color: var(--sf-brand-primary); color: var(--sf-brand-primary); }
.sf-cs__nav-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.sf-cs__flashcard-confidence {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    max-width: 640px;
    margin: 0 auto;
}
.sf-cs__confidence-label {
    font-size: 13px;
    color: var(--sf-text-tertiary);
    font-weight: 600;
}
.sf-cs__confidence-btn {
    padding: 6px 16px;
    border-radius: 16px;
    border: 1.5px solid var(--sf-border-color);
    background: var(--sf-bg-card);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}
.sf-cs__confidence-btn--know {
    color: #2E7D32;
}
.sf-cs__confidence-btn--know:hover, .sf-cs__confidence-btn--know.selected {
    background: #E8F5E9;
    border-color: #4CAF50;
}
.sf-cs__confidence-btn--unsure {
    color: #E65100;
}
.sf-cs__confidence-btn--unsure:hover, .sf-cs__confidence-btn--unsure.selected {
    background: #FFF3E0;
    border-color: #FF9800;
}
.sf-cs__confidence-btn--dunno {
    color: #C62828;
}
.sf-cs__confidence-btn--dunno:hover, .sf-cs__confidence-btn--dunno.selected {
    background: #FFEBEE;
    border-color: #EF5350;
}

.sf-cs__shuffle-btn {
    padding: 8px 20px;
    border-radius: 20px;
    border: 1.5px solid var(--sf-border-color);
    background: var(--sf-bg-card);
    font-size: 13px;
    font-weight: 600;
    color: var(--sf-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}
.sf-cs__shuffle-btn:hover { border-color: var(--sf-brand-primary); color: var(--sf-brand-primary); }

/* ── Quiz Area ────────────────────────────────────────────────────────── */

.sf-cs__quiz-area {
    display: none;
}
.sf-cs__quiz-area.active { display: block; }

.sf-cs__quiz-setup {
    background: var(--sf-bg-card);
    border: 1px solid var(--sf-border-color);
    border-radius: var(--sf-border-radius);
    padding: 32px;
    max-width: 520px;
    margin: 0 auto;
    text-align: center;
}
.sf-cs__quiz-setup h3 {
    font-size: 20px;
    font-weight: 700;
    margin: 0 0 8px;
    color: var(--sf-text-primary);
}
.sf-cs__quiz-setup p {
    font-size: 14px;
    color: var(--sf-text-secondary);
    margin: 0 0 20px;
}
.sf-cs__quiz-option-group {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}
.sf-cs__quiz-option {
    padding: 8px 20px;
    border: 1.5px solid var(--sf-border-color);
    border-radius: 20px;
    background: var(--sf-bg-card);
    font-size: 14px;
    font-weight: 600;
    color: var(--sf-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}
.sf-cs__quiz-option.active {
    background: var(--sf-brand-primary);
    color: white;
    border-color: var(--sf-brand-primary);
}
.sf-cs__quiz-start-btn {
    padding: 12px 36px;
    border-radius: 24px;
    border: none;
    background: var(--sf-brand-primary);
    color: white;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: opacity 0.2s;
}
.sf-cs__quiz-start-btn:hover { opacity: 0.9; }

/* Quiz in progress */
.sf-cs__quiz-live {
    display: none;
    max-width: 640px;
    margin: 0 auto;
}
.sf-cs__quiz-live.active { display: block; }

.sf-cs__quiz-progress {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    font-size: 14px;
    color: var(--sf-text-tertiary);
    font-weight: 600;
}
.sf-cs__quiz-progress-bar {
    height: 6px;
    background: var(--sf-border-color);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 20px;
}
.sf-cs__quiz-progress-fill {
    height: 100%;
    background: var(--sf-brand-primary);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.sf-cs__quiz-question {
    background: var(--sf-bg-card);
    border: 1px solid var(--sf-border-color);
    border-radius: var(--sf-border-radius);
    padding: 28px;
    margin-bottom: 20px;
}
.sf-cs__quiz-q-label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--sf-text-tertiary);
    margin-bottom: 8px;
}
.sf-cs__quiz-q-text {
    font-size: 17px;
    font-weight: 600;
    color: var(--sf-text-primary);
    line-height: 1.5;
    margin: 0;
}

.sf-cs__quiz-answers {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}
.sf-cs__quiz-answer {
    background: var(--sf-bg-card);
    border: 1.5px solid var(--sf-border-color);
    border-radius: var(--sf-border-radius-sm);
    padding: 14px 18px;
    font-size: 14px;
    color: var(--sf-text-primary);
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    line-height: 1.5;
}
.sf-cs__quiz-answer:hover:not(.disabled) {
    border-color: var(--sf-brand-primary);
    background: var(--sf-brand-light);
}
.sf-cs__quiz-answer.correct {
    border-color: #4CAF50;
    background: #E8F5E9;
    color: #1B5E20;
}
.sf-cs__quiz-answer.incorrect {
    border-color: #EF5350;
    background: #FFEBEE;
    color: #B71C1C;
}
.sf-cs__quiz-answer.disabled {
    cursor: default;
    opacity: 0.7;
}
.sf-cs__quiz-answer.disabled.correct {
    opacity: 1;
}
.sf-cs__quiz-answer-letter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--sf-border-color);
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}
.sf-cs__quiz-answer.correct .sf-cs__quiz-answer-letter {
    background: #4CAF50;
    color: white;
}
.sf-cs__quiz-answer.incorrect .sf-cs__quiz-answer-letter {
    background: #EF5350;
    color: white;
}

.sf-cs__quiz-feedback {
    display: none;
    background: var(--sf-bg-card);
    border: 1px solid var(--sf-border-color);
    border-radius: var(--sf-border-radius-sm);
    padding: 16px 20px;
    margin-bottom: 16px;
    font-size: 14px;
    line-height: 1.5;
    color: var(--sf-text-secondary);
}
.sf-cs__quiz-feedback.active { display: block; }

.sf-cs__quiz-next-btn {
    display: none;
    margin: 0 auto;
    padding: 10px 32px;
    border-radius: 20px;
    border: none;
    background: var(--sf-brand-primary);
    color: white;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: opacity 0.2s;
}
.sf-cs__quiz-next-btn.active { display: block; }
.sf-cs__quiz-next-btn:hover { opacity: 0.9; }

/* Quiz Results */
.sf-cs__quiz-results {
    display: none;
    max-width: 520px;
    margin: 0 auto;
    text-align: center;
}
.sf-cs__quiz-results.active { display: block; }

.sf-cs__results-card {
    background: var(--sf-bg-card);
    border: 1px solid var(--sf-border-color);
    border-radius: var(--sf-border-radius);
    padding: 36px;
}
.sf-cs__results-icon {
    font-size: 56px;
    margin-bottom: 8px;
}
.sf-cs__results-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--sf-text-primary);
    margin: 0 0 4px;
}
.sf-cs__results-subtitle {
    font-size: 14px;
    color: var(--sf-text-secondary);
    margin: 0 0 20px;
}
.sf-cs__results-score {
    font-size: 48px;
    font-weight: 800;
    color: var(--sf-brand-primary);
    margin-bottom: 4px;
}
.sf-cs__results-detail {
    font-size: 14px;
    color: var(--sf-text-tertiary);
    margin-bottom: 24px;
}
.sf-cs__results-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}
.sf-cs__results-btn {
    padding: 10px 28px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}
.sf-cs__results-btn--primary {
    background: var(--sf-brand-primary);
    color: white;
    border: none;
}
.sf-cs__results-btn--primary:hover { opacity: 0.9; }
.sf-cs__results-btn--secondary {
    background: var(--sf-bg-card);
    color: var(--sf-text-secondary);
    border: 1.5px solid var(--sf-border-color);
}
.sf-cs__results-btn--secondary:hover { border-color: var(--sf-brand-primary); color: var(--sf-brand-primary); }

/* ── Term Browser ─────────────────────────────────────────────────────── */

.sf-cs__browse-area {
    display: none;
}
.sf-cs__browse-area.active { display: block; }

.sf-cs__browse-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.sf-cs__browse-search {
    flex: 1;
    min-width: 200px;
    padding: 10px 16px;
    border: 1.5px solid var(--sf-border-color);
    border-radius: 20px;
    font-size: 14px;
    background: var(--sf-bg-card);
    color: var(--sf-text-primary);
    outline: none;
    transition: border-color 0.2s;
}
.sf-cs__browse-search:focus { border-color: var(--sf-brand-primary); }
.sf-cs__browse-search::placeholder { color: var(--sf-text-tertiary); }

.sf-cs__browse-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 12px;
}
.sf-cs__browse-item {
    background: var(--sf-bg-card);
    border: 1px solid var(--sf-border-color);
    border-radius: var(--sf-border-radius-sm);
    padding: 16px 18px;
    transition: box-shadow 0.2s;
}
.sf-cs__browse-item:hover { box-shadow: var(--sf-shadow-card-hover); }
.sf-cs__browse-item-term {
    font-size: 15px;
    font-weight: 700;
    color: var(--sf-text-primary);
    margin-bottom: 4px;
}
.sf-cs__browse-item-cat {
    font-size: 12px;
    color: var(--sf-text-tertiary);
    margin-bottom: 8px;
}
.sf-cs__browse-item-def {
    font-size: 13px;
    color: var(--sf-text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ── Responsive ───────────────────────────────────────────────────────── */

@media (max-width: 600px) {
    .sf-cs__hero { padding: 32px 16px; }
    .sf-cs__hero h1 { font-size: 24px; }
    .sf-cs__container { padding: 20px 16px 32px; }
    .sf-cs__picker { grid-template-columns: 1fr 1fr; gap: 12px; }
    .sf-cs__cert-card { padding: 16px; }
    .sf-cs__cert-icon { font-size: 28px; }
    .sf-cs__cert-title { font-size: 14px; }
    .sf-cs__flashcard-wrapper { margin-bottom: 20px; }
    .sf-cs__flashcard { min-height: 260px; }
    .sf-cs__flashcard-term { font-size: 22px; }
    .sf-cs__flashcard-def { font-size: 14px; }
    .sf-cs__flashcard-face { padding: 28px 20px; }
    .sf-cs__quiz-question { padding: 20px; }
    .sf-cs__browse-list { grid-template-columns: 1fr; }
    .sf-cs__stats { grid-template-columns: repeat(2, 1fr); }
    .sf-cs__modes { gap: 6px; }
    .sf-cs__mode-btn { padding: 8px 16px; font-size: 13px; }
}

@media (max-width: 400px) {
    .sf-cs__picker { grid-template-columns: 1fr; }
}

/* ── Dark Mode ────────────────────────────────────────────────────────── */

[data-theme="dark"] .sf-cs__hero {
    background: linear-gradient(135deg, #0D1B2A 0%, #0F2847 55%, #122F54 100%);
}
[data-theme="dark"] .sf-cs__flashcard-back {
    background: #1C2128;
}
[data-theme="dark"] .sf-cs__quiz-answer.correct {
    background: #1B3D1F;
    border-color: #388E3C;
    color: #81C784;
}
[data-theme="dark"] .sf-cs__quiz-answer.incorrect {
    background: #3D1B1B;
    border-color: #C62828;
    color: #EF9A9A;
}
[data-theme="dark"] .sf-cs__quiz-answer.correct .sf-cs__quiz-answer-letter {
    background: #388E3C;
}
[data-theme="dark"] .sf-cs__quiz-answer.incorrect .sf-cs__quiz-answer-letter {
    background: #C62828;
}
[data-theme="dark"] .sf-cs__confidence-btn--know:hover,
[data-theme="dark"] .sf-cs__confidence-btn--know.selected {
    background: #1B3D1F; border-color: #388E3C; color: #81C784;
}
[data-theme="dark"] .sf-cs__confidence-btn--unsure:hover,
[data-theme="dark"] .sf-cs__confidence-btn--unsure.selected {
    background: #3D2E1B; border-color: #E65100; color: #FFB74D;
}
[data-theme="dark"] .sf-cs__confidence-btn--dunno:hover,
[data-theme="dark"] .sf-cs__confidence-btn--dunno.selected {
    background: #3D1B1B; border-color: #C62828; color: #EF9A9A;
}