/* ============================================
   SALESFORCE INTERVIEW PREP — LIGHT THEME
   Maximum Readability Design
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ---------- CSS Custom Properties ---------- */
:root {
    /* Base Colors — Clean, bright, readable */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fb;
    --bg-tertiary: #f1f3f7;
    --bg-card: #ffffff;
    --bg-hover: #f4f6f9;

    /* Text — High contrast for readability */
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a68;
    --text-tertiary: #7a7a96;
    --text-muted: #a0a0b8;

    /* Brand / Accent */
    --accent-blue: #2563eb;
    --accent-blue-light: #eff4ff;
    --accent-cyan: #0891b2;
    --accent-purple: #7c3aed;
    --accent-pink: #db2777;
    --accent-green: #059669;
    --accent-green-light: #ecfdf5;
    --accent-orange: #d97706;
    --accent-orange-light: #fffbeb;
    --accent-red: #dc2626;

    /* Topic Colors */
    --color-sales: #2563eb;
    --color-service: #0891b2;
    --color-platform: #7c3aed;
    --color-agentforce: #db2777;
    --color-integration: #d97706;
    --color-flow: #059669;

    /* Borders */
    --border-subtle: #e8eaef;
    --border-light: #d4d8e0;
    --border-medium: #b8bcc8;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 0.15s var(--ease-out);
    --transition-normal: 0.3s var(--ease-out);

    /* Layout */
    --max-width: 900px;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    font-size: 16px;
}

a {
    color: var(--accent-blue);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

code,
.mono {
    font-family: 'JetBrains Mono', monospace;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.2rem;
}

/* ---------- Layout ---------- */
.app-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 24px 20px;
}

.section {
    margin-bottom: 48px;
}

.section-header {
    margin-bottom: 20px;
}

.section-title {
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-subtitle {
    color: var(--text-secondary);
    margin-top: 4px;
    font-size: 0.9rem;
}

/* ---------- Hero ---------- */
.hero {
    text-align: center;
    padding: 48px 20px 40px;
    margin-bottom: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--accent-blue-light);
    border: 1px solid #dbeafe;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-blue);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.hero h1 {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.hero h1 .highlight {
    color: var(--accent-blue);
}

.hero p {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 560px;
    margin: 0 auto 24px;
}

.countdown-bar {
    display: inline-flex;
    align-items: center;
    gap: 24px;
    padding: 12px 28px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
}

.countdown-item {
    text-align: center;
}

.countdown-number {
    display: block;
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent-blue);
}

.countdown-label {
    font-size: 0.65rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.countdown-sep {
    font-size: 1.2rem;
    color: var(--text-muted);
}

/* ---------- Main Nav ---------- */
.main-nav {
    display: flex;
    gap: 4px;
    padding: 4px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    margin-bottom: 32px;
    overflow-x: auto;
    position: sticky;
    top: 12px;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.main-nav::-webkit-scrollbar {
    display: none;
}

.main-nav-btn {
    flex: 1;
    min-width: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 16px;
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.main-nav-btn:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.main-nav-btn.active {
    color: #fff;
    background: var(--accent-blue);
    box-shadow: var(--shadow-sm);
}

.main-nav-btn .nav-icon {
    font-size: 1.1rem;
}

/* ---------- Content Panels ---------- */
.content-panel {
    display: none;
    animation: fadeIn 0.25s var(--ease-out);
}

.content-panel.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---------- Dashboard Stats ---------- */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 32px;
}

.stat-card {
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
}

.stat-card-icon {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.stat-card-value {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-primary);
}

.stat-card-label {
    color: var(--text-tertiary);
    font-size: 0.8rem;
    font-weight: 500;
}

/* ---------- Progress Bar ---------- */
.progress-section {
    margin-bottom: 24px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-top: 6px;
}

.progress-bar-fill {
    height: 100%;
    border-radius: var(--radius-full);
    background: var(--accent-blue);
    transition: width 0.6s var(--ease-out);
}

.progress-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.progress-percent {
    font-weight: 700;
    color: var(--accent-blue);
}

/* ---------- Topic Cards ---------- */
.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
}

.topic-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    overflow: hidden;
}

.topic-card:hover {
    border-color: var(--border-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.topic-card-header {
    padding: 16px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.topic-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.topic-icon.sales {
    background: #eff4ff;
}

.topic-icon.service {
    background: #ecfeff;
}

.topic-icon.platform {
    background: #f3f0ff;
}

.topic-icon.agentforce {
    background: #fdf2f8;
}

.topic-icon.integration {
    background: #fffbeb;
}

.topic-icon.flow {
    background: #ecfdf5;
}

.topic-info h3 {
    font-size: 1rem;
    margin-bottom: 2px;
}

.topic-info p {
    color: var(--text-secondary);
    font-size: 0.82rem;
    line-height: 1.5;
}

.topic-card-footer {
    padding: 10px 16px;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-secondary);
}

.topic-progress {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.progress-bar-mini {
    width: 60px;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar-mini-fill {
    height: 100%;
    border-radius: var(--radius-full);
    background: var(--accent-green);
    transition: width 0.5s;
}

.topic-tag {
    font-size: 0.65rem;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.topic-tag.essential {
    background: var(--accent-green-light);
    color: var(--accent-green);
}

.topic-tag.trending {
    background: #fdf2f8;
    color: var(--accent-pink);
}

/* ---------- Topic Detail ---------- */
.topic-detail-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    margin-bottom: 24px;
}

.back-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-btn:hover {
    background: var(--bg-tertiary);
}

.topic-detail-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.topic-detail-info h2 {
    margin-bottom: 2px;
    font-size: 1.3rem;
}

.topic-detail-info p {
    color: var(--text-secondary);
    font-size: 0.88rem;
}

/* ---------- Concept Cards ---------- */
.concepts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 10px;
    margin-bottom: 24px;
}

.concept-card {
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition-fast);
}

.concept-card:hover {
    border-color: var(--border-light);
}

.concept-card h4 {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.concept-card p {
    color: var(--text-secondary);
    font-size: 0.84rem;
    line-height: 1.65;
}

/* ==========================================
   SESSION / QUIZ MODE
   ========================================== */
.session-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-secondary);
    z-index: 1000;
    overflow-y: auto;
}

.session-overlay.active {
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.session-container {
    width: 100%;
    max-width: 720px;
    padding: 32px 24px;
    margin: 0 auto;
}

.session-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.session-close {
    padding: 8px 16px;
    border: 1px solid var(--border-light);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.session-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.session-progress-info {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.session-step-indicator {
    font-weight: 700;
    color: var(--accent-blue);
    font-size: 0.9rem;
}

.session-progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    margin-bottom: 32px;
    overflow: hidden;
}

.session-progress-fill {
    height: 100%;
    background: var(--accent-blue);
    border-radius: var(--radius-full);
    transition: width 0.4s var(--ease-out);
}

/* Question in session */
.session-question-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}

.session-question-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.session-question-text {
    font-size: 1.15rem;
    font-weight: 700;
    line-height: 1.5;
    color: var(--text-primary);
    margin-bottom: 0;
}

/* Answer reveal — old toggle pattern removed, answers are now appended directly */

.session-answer-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-green);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 10px;
}

.session-answer-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.session-answer-text strong {
    color: var(--text-primary);
}

/* Session buttons */
.session-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.session-btn {
    padding: 12px 28px;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.session-btn-reveal {
    background: var(--accent-blue);
    color: #fff;
    width: 100%;
}

.session-btn-reveal:hover {
    background: #1d4ed8;
}

.session-btn-next {
    background: var(--accent-green);
    color: #fff;
    flex: 1;
}

.session-btn-next:hover {
    background: #047857;
}

.session-btn-repeat {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
}

.session-btn-repeat:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Session complete screen */
.session-complete {
    text-align: center;
    padding: 48px 24px;
}

.session-complete-icon {
    font-size: 4rem;
    margin-bottom: 16px;
}

.session-complete h2 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.session-complete p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 1rem;
}

.session-complete-stats {
    display: flex;
    gap: 24px;
    justify-content: center;
    margin-bottom: 32px;
}

.session-complete-stat {
    padding: 16px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    text-align: center;
}

.session-complete-stat .val {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-blue);
}

.session-complete-stat .label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
}

/* Start session button on topic cards */
.start-session-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px;
    margin-top: 16px;
    background: var(--accent-blue);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.start-session-btn:hover {
    background: #1d4ed8;
    box-shadow: var(--shadow-md);
}

/* ---------- Question Card (for reference/browse mode) ---------- */
.question-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.question-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.question-card:hover {
    border-color: var(--border-light);
}

.question-header {
    padding: 16px;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    cursor: pointer;
}

.question-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 6px;
    flex-wrap: wrap;
}

.question-difficulty {
    font-size: 0.65rem;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-weight: 700;
    text-transform: uppercase;
}

.difficulty-easy {
    background: var(--accent-green-light);
    color: var(--accent-green);
}

.difficulty-medium {
    background: var(--accent-orange-light);
    color: var(--accent-orange);
}

.difficulty-hard {
    background: #fef2f2;
    color: var(--accent-red);
}

.question-role-tag {
    font-size: 0.6rem;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-weight: 700;
    text-transform: uppercase;
}

.role-architect {
    background: var(--accent-orange-light);
    color: var(--accent-orange);
}

.role-consultant {
    background: var(--accent-blue-light);
    color: var(--accent-blue);
}

.role-pm {
    background: #f3f0ff;
    color: var(--accent-purple);
}

.question-text {
    font-weight: 600;
    font-size: 0.92rem;
    line-height: 1.5;
    color: var(--text-primary);
}

.question-toggle-btn {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
    background: var(--bg-secondary);
    color: var(--text-tertiary);
    font-size: 0.8rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.question-toggle-btn:hover {
    background: var(--bg-tertiary);
}

.question-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s var(--ease-out);
}

.question-answer-body {
    padding: 0 16px 16px;
    border-top: 1px solid var(--border-subtle);
    padding-top: 16px;
}

.answer-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--accent-green);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 8px;
}

.answer-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.75;
}

.answer-text strong {
    color: var(--text-primary);
}

/* ---------- Study Plan ---------- */
.study-plan {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.study-week {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.study-week-header {
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-family: inherit;
    width: 100%;
    text-align: left;
}

.study-week-header:hover {
    background: var(--bg-hover);
}

.week-title {
    font-weight: 700;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.week-badge {
    padding: 2px 10px;
    background: var(--accent-blue-light);
    border: 1px solid #dbeafe;
    border-radius: var(--radius-full);
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--accent-blue);
}

.study-week-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s var(--ease-out);
}

.study-week.open .study-week-content {
    max-height: 2000px;
}

.study-days {
    padding: 0 16px 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.study-day {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
}

.day-checkbox {
    width: 22px;
    height: 22px;
    border-radius: 6px;
    border: 2px solid var(--border-medium);
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
    color: transparent;
    font-size: 0.75rem;
}

.day-checkbox.checked {
    background: var(--accent-green);
    border-color: var(--accent-green);
    color: #fff;
}

.day-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-tertiary);
    text-transform: uppercase;
    min-width: 45px;
}

.day-content {
    flex: 1;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.day-content strong {
    color: var(--text-primary);
}

.day-topic-tag {
    font-size: 0.6rem;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-weight: 700;
    white-space: nowrap;
}

/* ---------- Role Profiles ---------- */
.roles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.role-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.role-card:hover {
    box-shadow: var(--shadow-md);
}

.role-card-top {
    padding: 20px;
    position: relative;
}

.role-card-top::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
}

.role-card.architect .role-card-top::before {
    background: var(--accent-orange);
}

.role-card.consultant .role-card-top::before {
    background: var(--accent-blue);
}

.role-card.pm .role-card-top::before {
    background: var(--accent-purple);
}

.role-card-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.role-card-subtitle {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 14px;
    line-height: 1.55;
}

.role-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.role-skill-tag {
    font-size: 0.7rem;
    padding: 3px 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-weight: 500;
}

.role-card-bottom {
    padding: 14px 20px;
    border-top: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
}

.role-card-bottom h4 {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-tertiary);
    margin-bottom: 8px;
}

.role-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.role-topic-pill {
    font-size: 0.68rem;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-weight: 600;
}

/* ---------- Filter & Search ---------- */
.filter-bar {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.filter-btn {
    padding: 8px 14px;
    border: 1px solid var(--border-subtle);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    border-color: var(--border-medium);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #fff;
}

.search-bar {
    position: relative;
    margin-bottom: 16px;
}

.search-input {
    width: 100%;
    padding: 10px 16px 10px 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 3px;
}

/* ---------- Utilities ---------- */
.hidden {
    display: none !important;
}

.text-xs {
    font-size: 0.75rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    .app-container {
        padding: 16px 12px;
    }

    .hero {
        padding: 32px 16px;
    }

    .countdown-bar {
        flex-wrap: wrap;
        gap: 16px;
    }

    .dashboard-grid {
        grid-template-columns: 1fr 1fr;
    }

    .topics-grid {
        grid-template-columns: 1fr;
    }

    .concepts-grid {
        grid-template-columns: 1fr;
    }

    .main-nav-btn {
        min-width: auto;
        padding: 8px 12px;
        font-size: 0.78rem;
    }

    .main-nav-btn .nav-label {
        display: none;
    }

    .session-question-card {
        padding: 20px;
    }

    .session-question-text {
        font-size: 1rem;
    }

    .session-container {
        padding: 20px 16px;
    }
}

@media (max-width: 480px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .session-complete-stats {
        flex-direction: column;
        gap: 8px;
    }
}

/* ============================================
   NEW: Company-Specific Styles
   ============================================ */

/* ---------- Countdown Area ---------- */
.countdown-area {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 20px;
}

.countdown-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 14px 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-card);
    min-width: 160px;
}

.countdown-card.edenred {
    border-left: 4px solid #e4002b;
}

.countdown-card.epam {
    border-left: 4px solid #39a5dc;
}

.cd-company {
    font-weight: 700;
    font-size: 0.85rem;
}

.cd-time {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--accent-blue);
}

.cd-role {
    font-size: 0.72rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ---------- Nav Tabs ---------- */
.nav-tab {
    flex: 1;
    min-width: 80px;
    padding: 10px 16px;
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.nav-tab:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.nav-tab.active {
    color: #fff;
    background: var(--accent-blue);
    box-shadow: var(--shadow-sm);
}

/* ---------- Section Visibility ---------- */
.section {
    display: none;
    animation: fadeIn 0.25s var(--ease-out);
}

.section.active {
    display: block;
}

/* ---------- Progress Bar ---------- */
.progress-bar-container {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.progress-bar-container span:last-child {
    font-weight: 700;
    color: var(--accent-blue);
}

.progress-fill {
    height: 100%;
    border-radius: var(--radius-full);
    background: var(--accent-blue);
    transition: width 0.6s var(--ease-out);
}

/* ---------- Stats Grid ---------- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    margin-top: 20px;
}

.stat-card {
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
}

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

.stat-value {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-primary);
}

.stat-label {
    color: var(--text-tertiary);
    font-size: 0.8rem;
}

/* ---------- Company Badge ---------- */
.company-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.completed-badge {
    font-size: 1rem;
}

/* ---------- Topic Card (new) ---------- */
.topic-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 16px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.topic-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.topic-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.topic-icon {
    font-size: 1.3rem;
}

.topic-desc {
    color: var(--text-secondary);
    font-size: 0.84rem;
    margin: 6px 0;
    line-height: 1.5;
}

.topic-meta {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    display: flex;
    gap: 12px;
}

.topic-card h3 {
    font-size: 1rem;
}

/* ---------- Topic Detail ---------- */
.back-btn {
    display: inline-block;
    padding: 8px 16px;
    border: 1px solid var(--border-light);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    margin-bottom: 16px;
}

.back-btn:hover {
    background: var(--bg-tertiary);
}

.detail-header {
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.detail-title {
    font-size: 1.3rem;
    font-weight: 700;
}

.detail-desc {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.section-subtitle {
    font-size: 1rem;
    font-weight: 700;
    margin: 20px 0 12px;
}

/* ---------- Session Start Button ---------- */
.session-start-area {
    text-align: center;
    margin: 24px 0;
}

.btn-start-session {
    display: inline-block;
    padding: 14px 32px;
    border: none;
    border-radius: var(--radius-md);
    color: #fff;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-start-session:hover {
    opacity: 0.9;
    transform: scale(1.02);
}

/* ---------- Question Preview ---------- */
.question-preview {
    padding: 10px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
}

.q-num {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-tertiary);
    flex-shrink: 0;
}

/* ---------- Session Mode Card ---------- */
.session-topic {
    font-weight: 700;
    font-size: 0.95rem;
}

.session-counter {
    color: var(--accent-blue);
    font-weight: 800;
}

.session-progress {
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    margin-bottom: 32px;
    overflow: hidden;
}

.session-progress-fill {
    height: 100%;
    background: var(--accent-blue);
    border-radius: var(--radius-full);
    transition: width 0.4s var(--ease-out);
}

.session-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}

.session-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.session-question {
    font-size: 1.15rem;
    font-weight: 700;
    line-height: 1.55;
    white-space: pre-line;
}

.session-question-en {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-top: 12px;
    font-style: italic;
    line-height: 1.5;
    white-space: pre-line;
}

.session-divider {
    border: none;
    border-top: 2px solid var(--bg-tertiary);
    margin: 20px 0;
}

.session-answer-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-green);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 10px;
}

.session-answer {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    white-space: pre-line;
}

.btn-reveal {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--accent-blue);
    color: #fff;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-reveal:hover {
    background: #1d4ed8;
}

.btn-repeat {
    padding: 12px 28px;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
}

.btn-next {
    padding: 12px 28px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--accent-green);
    color: #fff;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    flex: 1;
}

/* ---------- Session Complete ---------- */
.session-complete {
    text-align: center;
    padding: 48px 24px;
}

.complete-icon {
    font-size: 4rem;
    margin-bottom: 16px;
}

.complete-stats {
    display: flex;
    gap: 32px;
    justify-content: center;
    margin: 24px 0;
}

.complete-stats .stat {
    display: flex;
    flex-direction: column;
}

.complete-stats .stat strong {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.complete-stats .stat span {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* ---------- Difficulty & Role Badges ---------- */
.diff-badge {
    font-size: 0.65rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.diff-easy {
    background: #ecfdf5;
    color: #059669;
}

.diff-medium {
    background: #fffbeb;
    color: #d97706;
}

.diff-hard {
    background: #fef2f2;
    color: #dc2626;
}

.role-badge {
    font-size: 0.65rem;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: var(--radius-full);
    background: var(--accent-blue-light);
    color: var(--accent-blue);
    text-transform: uppercase;
}

/* ---------- Question Bank ---------- */
.qbank-filters {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 16px;
    border: 1px solid var(--border-subtle);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    cursor: pointer;
}

.filter-btn.active {
    background: var(--accent-blue);
    color: #fff;
    border-color: var(--accent-blue);
}

.search-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.9rem;
    margin-bottom: 16px;
    background: var(--bg-card);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.qbank-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 10px;
}

.qbank-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.qbank-question {
    font-weight: 700;
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 10px;
    white-space: pre-line;
}

.qbank-answer {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--text-secondary);
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    white-space: pre-line;
}

.qbank-answer.hidden {
    display: none;
}

.qbank-toggle {
    display: block;
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    margin-top: 8px;
}

/* ---------- Study Plan ---------- */
.plan-week {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    overflow: hidden;
}

.plan-week-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-subtle);
}

.plan-week-header h3 {
    font-size: 0.95rem;
}

.plan-badge {
    padding: 4px 10px;
    border-radius: var(--radius-full);
    background: var(--accent-blue-light);
    color: var(--accent-blue);
    font-size: 0.7rem;
    font-weight: 700;
}

.plan-day {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-subtle);
    cursor: pointer;
    font-size: 0.88rem;
}

.plan-day:last-child {
    border-bottom: none;
}

.plan-day.done {
    background: #f0fdf4;
}

.plan-day-label {
    font-weight: 700;
    min-width: 60px;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.plan-day-content {
    flex: 1;
    line-height: 1.4;
}

.plan-go-btn {
    padding: 4px 10px;
    border: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
    color: var(--text-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    flex-shrink: 0;
}

.plan-go-btn:hover {
    background: var(--accent-blue);
    color: #fff;
}

/* ---------- Roles Grid ---------- */
.roles-grid {
    display: grid;
    gap: 16px;
}

.role-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 20px;
}

.role-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.role-icon {
    font-size: 2rem;
}

.role-card h3 {
    font-size: 1.1rem;
    margin-bottom: 2px;
}

.role-card h4 {
    font-size: 0.9rem;
    margin: 14px 0 8px;
    color: var(--text-secondary);
}

.interview-date {
    display: inline-block;
    padding: 6px 12px;
    background: #ecfdf5;
    color: #059669;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.skills-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.skill-tag {
    padding: 4px 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.jd-match {
    list-style: none;
    padding: 0;
}

.jd-match li {
    padding: 4px 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
}