/**
 * Badge & Hose — Base Styles
 * Mobile-first responsive design for consumer test prep.
 *
 * Color system: Professional, trustworthy — navy/gold as primary.
 * Typography: System font stack (no external fonts for CSP compliance).
 */

/* ============================================
   CSS Custom Properties
   ============================================ */
:root {
    /* Primary palette */
    --bh-navy: #1a2744;
    --bh-navy-light: #2a3f66;
    --bh-navy-dark: #0f1a2e;
    --bh-gold: #c8992e;
    --bh-gold-light: #e6b84d;
    --bh-gold-muted: #d4a94533;

    /* Neutrals */
    --bh-white: #ffffff;
    --bh-off-white: #f7f8fa;
    --bh-gray-100: #f0f1f4;
    --bh-gray-200: #e1e3e8;
    --bh-gray-300: #c4c8d0;
    --bh-gray-500: #6b7280;
    --bh-gray-700: #374151;
    --bh-gray-900: #111827;

    /* Semantic */
    --bh-success: #16a34a;
    --bh-success-bg: #f0fdf4;
    --bh-error: #dc2626;
    --bh-error-bg: #fef2f2;
    --bh-warning: #d97706;
    --bh-warning-bg: #fffbeb;
    --bh-info: #2563eb;
    --bh-info-bg: #eff6ff;

    /* Typography */
    --font-body: 'Segoe UI', Arial, sans-serif;
    --font-heading: 'Segoe UI', Arial, sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Layout */
    --max-width: 1200px;
    --header-height: 64px;

    /* Borders & Shadows */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--bh-gray-900);
    background-color: var(--bh-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ============================================
   Accessibility
   ============================================ */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-md);
    z-index: 10000;
    padding: var(--space-sm) var(--space-md);
    background: var(--bh-navy);
    color: var(--bh-white);
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
}

.skip-link:focus {
    top: var(--space-sm);
}

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

:focus-visible {
    outline: 2px solid var(--bh-gold);
    outline-offset: 2px;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--bh-navy);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

@media (min-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.375rem; }
}

p {
    margin-bottom: var(--space-md);
}

a {
    color: var(--bh-info);
    text-decoration: underline;
}

a:hover {
    color: var(--bh-navy);
}

/* ============================================
   Layout
   ============================================ */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-xl);
    }
}

/* ============================================
   Header
   ============================================ */
.site-header {
    height: var(--header-height);
    background: var(--bh-navy);
    color: var(--bh-white);
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-md);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--bh-white);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.site-logo .ampersand {
    color: var(--bh-gold);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.site-nav a {
    color: var(--bh-gray-200);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.15s;
}

.site-nav a:hover {
    color: var(--bh-white);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.625rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 600;
    font-family: var(--font-body);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--bh-gold);
    color: var(--bh-navy-dark);
    border-color: var(--bh-gold);
}

.btn-primary:hover:not(:disabled) {
    background: var(--bh-gold-light);
    border-color: var(--bh-gold-light);
}

.btn-secondary {
    background: var(--bh-navy);
    color: var(--bh-white);
    border-color: var(--bh-navy);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bh-navy-light);
    border-color: var(--bh-navy-light);
}

.btn-outline {
    background: transparent;
    color: var(--bh-navy);
    border-color: var(--bh-navy);
}

.btn-outline:hover:not(:disabled) {
    background: var(--bh-navy);
    color: var(--bh-white);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
}

/* ============================================
   Cards
   ============================================ */
.card {
    background: var(--bh-white);
    border: 1px solid var(--bh-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.15s;
}

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

/* ============================================
   Forms
   ============================================ */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--bh-gray-700);
}

.form-input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 1rem;
    font-family: var(--font-body);
    border: 1px solid var(--bh-gray-300);
    border-radius: var(--radius-md);
    background: var(--bh-white);
    color: var(--bh-gray-900);
    transition: border-color 0.15s;
}

.form-input:focus {
    border-color: var(--bh-gold);
    outline: none;
    box-shadow: 0 0 0 3px var(--bh-gold-muted);
}

.form-input.error {
    border-color: var(--bh-error);
}

.form-error {
    color: var(--bh-error);
    font-size: 0.8rem;
    margin-top: var(--space-xs);
}

/* ============================================
   Alerts / Feedback
   ============================================ */
.alert {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    font-size: 0.9rem;
}

.alert-success {
    background: var(--bh-success-bg);
    color: var(--bh-success);
    border: 1px solid var(--bh-success);
}

.alert-error {
    background: var(--bh-error-bg);
    color: var(--bh-error);
    border: 1px solid var(--bh-error);
}

.alert-warning {
    background: var(--bh-warning-bg);
    color: var(--bh-warning);
    border: 1px solid var(--bh-warning);
}

.alert-info {
    background: var(--bh-info-bg);
    color: var(--bh-info);
    border: 1px solid var(--bh-info);
}

/* ============================================
   Progress Bars
   ============================================ */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bh-gray-200);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--bh-gold);
    border-radius: 4px;
    transition: width 0.3s ease;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
    background: var(--bh-navy-dark);
    color: var(--bh-gray-300);
    padding: var(--space-2xl) 0;
    margin-top: var(--space-3xl);
    font-size: 0.85rem;
}

.site-footer a {
    color: var(--bh-gray-200);
    text-decoration: none;
}

.site-footer a:hover {
    color: var(--bh-white);
    text-decoration: underline;
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center { text-align: center; }
.text-muted { color: var(--bh-gray-500); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

/* ============================================
   Responsive Helpers
   ============================================ */
.hide-mobile {
    display: none;
}

@media (min-width: 768px) {
    .hide-mobile {
        display: initial;
    }
    .hide-desktop {
        display: none;
    }
}

/* ============================================
   App Header (authenticated pages)
   ============================================ */
.app-nav-links {
    display: none;
    align-items: center;
    gap: var(--space-lg);
}

@media (min-width: 768px) {
    .app-nav-links {
        display: flex;
    }
}

.app-nav-link {
    color: var(--bh-gray-200);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.15s;
    padding-bottom: 2px;
    border-bottom: 2px solid transparent;
}

.app-nav-link:hover {
    color: var(--bh-white);
}

.app-nav-link.nav-active {
    color: var(--bh-white);
    border-bottom-color: var(--bh-gold);
}

.user-nav {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.user-name {
    color: var(--bh-gray-200);
    font-size: 0.85rem;
}

.hamburger-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--bh-white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--space-xs);
    line-height: 1;
}

@media (min-width: 768px) {
    .hamburger-btn {
        display: none;
    }
}

.mobile-nav {
    display: none;
    background: var(--bh-navy-dark);
    padding: var(--space-md);
}

.mobile-nav-open {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.mobile-nav a {
    color: var(--bh-gray-200);
    text-decoration: none;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
}

.mobile-nav a:hover,
.mobile-nav a.nav-active {
    color: var(--bh-white);
    background: var(--bh-navy-light);
}

/* ============================================
   Page Shell (app pages)
   ============================================ */
.page-container {
    padding: var(--space-xl) 0;
    min-height: calc(100vh - var(--header-height) - 200px);
}

.page-title {
    margin-bottom: var(--space-xs);
}

.page-subtitle {
    color: var(--bh-gray-500);
    margin-bottom: var(--space-xl);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.85rem;
    color: var(--bh-gray-500);
    margin-bottom: var(--space-lg);
}

.breadcrumb a {
    color: var(--bh-gray-500);
    text-decoration: none;
}

.breadcrumb a:hover {
    color: var(--bh-navy);
}

.breadcrumb-sep {
    color: var(--bh-gray-300);
}

/* ============================================
   Construct Selector Grid
   ============================================ */
.construct-selector {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

@media (min-width: 600px) {
    .construct-selector {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 960px) {
    .construct-selector {
        grid-template-columns: 1fr 1fr 1fr 1fr;
    }
}

.construct-study-card {
    background: var(--bh-white);
    border: 1px solid var(--bh-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    cursor: pointer;
    transition: all 0.15s;
    border-left: 4px solid var(--bh-gray-300);
    text-decoration: none;
    color: inherit;
    display: block;
}

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

.construct-study-card h3 {
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
}

.construct-study-card .construct-stats {
    font-size: 0.85rem;
    color: var(--bh-gray-500);
    margin-bottom: var(--space-sm);
}

.construct-study-card .progress-bar {
    margin-top: var(--space-sm);
}

.construct-all-card {
    border-left-color: var(--bh-gold);
    background: var(--bh-off-white);
}

/* ============================================
   Study Session / Item Renderer
   ============================================ */
.session-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--bh-gray-200);
}

.session-progress {
    font-size: 0.9rem;
    color: var(--bh-gray-500);
}

.session-actions {
    display: flex;
    gap: var(--space-sm);
}

/* Stimulus / Passage Panel */
.stimulus-panel {
    background: var(--bh-off-white);
    border: 1px solid var(--bh-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    max-height: 400px;
    overflow-y: auto;
}

.stimulus-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.stimulus-title {
    font-size: 1rem;
    color: var(--bh-navy);
}

.stimulus-toggle {
    font-size: 0.8rem;
}

.stimulus-content {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--bh-gray-700);
}

.stimulus-content p {
    margin-bottom: var(--space-md);
}

.stimulus-collapsed {
    display: none;
}

@media (min-width: 768px) {
    .stimulus-panel {
        max-height: 500px;
    }
}

/* Question Text */
.question-text {
    font-size: 1.05rem;
    line-height: 1.6;
    margin-bottom: var(--space-md);
    color: var(--bh-gray-900);
}

.question-text p {
    margin-bottom: var(--space-sm);
}

.question-text .stem-question {
    font-weight: 600;
    margin-top: var(--space-md);
}

.stimulus-group-info {
    display: inline-block;
    font-size: 0.8rem;
    color: var(--bh-primary);
    background: var(--bh-primary-light, #e8f0fe);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm, 4px);
    margin-bottom: var(--space-sm);
    font-weight: 500;
}

.items-remaining-info {
    font-size: 0.8rem;
    color: var(--bh-gray-500);
    margin-bottom: var(--space-md);
}

.item-construct-tag {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--bh-gray-500);
    border-left: 3px solid var(--bh-gray-300);
    padding-left: var(--space-sm);
    margin-bottom: var(--space-lg);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Answer Options */
.options-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.option-card {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    width: 100%;
    min-height: 48px;
    padding: var(--space-md) var(--space-lg);
    background: var(--bh-white);
    border: 2px solid var(--bh-gray-200);
    border-radius: var(--radius-md);
    cursor: pointer;
    text-align: left;
    font-size: 0.95rem;
    font-family: var(--font-body);
    color: var(--bh-gray-900);
    transition: all 0.1s;
    line-height: 1.5;
}

.option-card:hover:not(.option-disabled) {
    border-color: var(--bh-navy-light);
    background: var(--bh-off-white);
}

.option-card.option-selected {
    border-color: var(--bh-navy);
    background: rgba(26, 39, 68, 0.05);
}

.option-card.option-correct {
    border-color: var(--bh-success);
    background: var(--bh-success-bg);
}

.option-card.option-incorrect {
    border-color: var(--bh-error);
    background: var(--bh-error-bg);
}

.option-card.option-disabled {
    cursor: default;
    opacity: 0.85;
}

.option-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    min-width: 28px;
    border-radius: 50%;
    background: var(--bh-gray-100);
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--bh-navy);
}

.option-selected .option-letter {
    background: var(--bh-navy);
    color: var(--bh-white);
}

.option-correct .option-letter {
    background: var(--bh-success);
    color: var(--bh-white);
}

.option-incorrect .option-letter {
    background: var(--bh-error);
    color: var(--bh-white);
}

.option-text {
    flex: 1;
    padding-top: 2px;
}

/* Submit & Next buttons */
.submit-answer-btn,
.next-question-btn {
    width: 100%;
    margin-bottom: var(--space-md);
}

@media (min-width: 768px) {
    .submit-answer-btn,
    .next-question-btn {
        width: auto;
        min-width: 200px;
    }
}

/* Feedback */
.item-feedback {
    margin-top: var(--space-lg);
}

.feedback-banner {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: var(--space-md);
}

.feedback-correct {
    background: var(--bh-success-bg);
    color: var(--bh-success);
    border: 1px solid var(--bh-success);
}

.feedback-incorrect {
    background: var(--bh-error-bg);
    color: var(--bh-error);
    border: 1px solid var(--bh-error);
}

.feedback-icon {
    font-size: 1.25rem;
}

.feedback-text {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--bh-gray-700);
    margin-bottom: var(--space-md);
    padding: var(--space-md);
    background: var(--bh-off-white);
    border-radius: var(--radius-md);
}

.rationale-details {
    margin-bottom: var(--space-lg);
}

.rationale-summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--bh-navy);
    font-size: 0.9rem;
    padding: var(--space-sm) 0;
}

.rationale-content {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--bh-gray-700);
    padding: var(--space-md);
    background: var(--bh-off-white);
    border-radius: var(--radius-md);
    margin-top: var(--space-sm);
}

/* ============================================
   Simulation Interface
   ============================================ */
.sim-topbar {
    background: var(--bh-navy);
    color: var(--bh-white);
    padding: var(--space-md) 0;
    position: sticky;
    top: var(--header-height);
    z-index: 50;
    box-shadow: var(--shadow-sm);
}

.sim-topbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sim-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--bh-white);
}

.sim-progress-indicator {
    font-size: 0.85rem;
    color: var(--bh-gray-300);
}

.sim-timer {
    font-size: 1rem;
    font-family: 'Courier New', Courier, monospace;
    color: var(--bh-white);
    font-weight: 700;
    background: rgba(255, 255, 255, 0.12);
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    letter-spacing: 0.05em;
    min-width: 4.5em;
    text-align: center;
}
.sim-timer.timer-warning {
    color: #fbbf24;
    background: rgba(251, 191, 36, 0.15);
}
.sim-timer.timer-danger {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.18);
    animation: timer-pulse 1s ease-in-out infinite;
}
@keyframes timer-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* Pre-simulation screen */
.sim-intro {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
    padding: var(--space-3xl) var(--space-md);
}

.sim-intro h1 {
    margin-bottom: var(--space-md);
}

.sim-intro-details {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    margin: var(--space-xl) 0;
    flex-wrap: wrap;
}

.sim-detail {
    text-align: center;
}

.sim-detail-number {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--bh-navy);
    display: block;
}

.sim-detail-label {
    font-size: 0.85rem;
    color: var(--bh-gray-500);
}

.sim-instructions {
    text-align: left;
    background: var(--bh-off-white);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin: var(--space-xl) 0;
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--bh-gray-700);
}

.sim-instructions ul {
    margin: var(--space-sm) 0;
    padding-left: var(--space-lg);
}

.sim-free-note {
    font-size: 0.85rem;
    color: var(--bh-gray-500);
    margin: var(--space-lg) 0 var(--space-sm);
    line-height: 1.5;
}

.sim-free-note a {
    color: var(--bh-navy);
    font-weight: 600;
}

.sim-exhausted-note {
    background: var(--bh-off-white);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin: var(--space-xl) 0;
    line-height: 1.6;
}

.sim-exhausted-note p {
    margin-bottom: var(--space-sm);
}

.sim-exhausted-note .btn {
    margin-top: var(--space-sm);
}

.sim-instructions li {
    margin-bottom: var(--space-xs);
}

/* ============================================
   Results Page
   ============================================ */
.results-header {
    text-align: center;
    padding: var(--space-2xl) 0 var(--space-xl);
}

.score-circle {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-lg);
    border: 6px solid;
}

.score-circle.score-high {
    border-color: var(--bh-success);
    color: var(--bh-success);
}

.score-circle.score-mid {
    border-color: var(--bh-gold);
    color: var(--bh-gold);
}

.score-circle.score-low {
    border-color: var(--bh-error);
    color: var(--bh-error);
}

.score-percentage {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
}

.score-fraction {
    font-size: 0.9rem;
    margin-top: var(--space-xs);
    color: var(--bh-gray-500);
}

/* Construct breakdown cards */
.construct-breakdown {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
    margin: var(--space-xl) 0;
}

@media (min-width: 600px) {
    .construct-breakdown {
        grid-template-columns: 1fr 1fr;
    }
}

.construct-result-card {
    background: var(--bh-white);
    border: 1px solid var(--bh-gray-200);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    border-left: 4px solid var(--bh-gray-300);
}

.construct-result-card h4 {
    font-size: 0.95rem;
    margin-bottom: var(--space-xs);
}

.construct-result-score {
    font-size: 0.85rem;
    color: var(--bh-gray-500);
    margin-bottom: var(--space-sm);
}

/* Item review */
.item-review-list {
    margin: var(--space-xl) 0;
}

.item-review-entry {
    border: 1px solid var(--bh-gray-200);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
    overflow: hidden;
}

.item-review-summary {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    cursor: pointer;
    background: var(--bh-white);
    list-style: none;
    width: 100%;
    font-family: var(--font-body);
    font-size: 0.9rem;
}

.item-review-summary::-webkit-details-marker {
    display: none;
}

.item-review-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
}

.item-review-icon.correct {
    color: var(--bh-success);
}

.item-review-icon.incorrect {
    color: var(--bh-error);
}

.item-review-meta {
    flex: 1;
    color: var(--bh-gray-700);
}

.item-review-tag {
    font-size: 0.75rem;
    color: var(--bh-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.item-review-detail {
    padding: var(--space-lg);
    background: var(--bh-off-white);
    border-top: 1px solid var(--bh-gray-200);
}

.item-review-detail .question-text {
    font-size: 0.9rem;
    margin-bottom: var(--space-md);
}

.answer-comparison {
    font-size: 0.85rem;
    margin-bottom: var(--space-md);
}

.answer-comparison .your-answer {
    margin-right: var(--space-lg);
}

.answer-correct {
    color: var(--bh-success);
    font-weight: 600;
}

.answer-wrong {
    color: var(--bh-error);
    font-weight: 600;
}

/* Results CTAs */
.results-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin: var(--space-xl) 0;
}

@media (min-width: 600px) {
    .results-actions {
        flex-direction: row;
        justify-content: center;
    }
}

/* Attempt history */
.attempt-history {
    margin-top: var(--space-2xl);
}

.attempt-history h3 {
    margin-bottom: var(--space-md);
}

.attempt-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    border: 1px solid var(--bh-gray-200);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
    background: var(--bh-white);
    font-size: 0.9rem;
}

.attempt-date {
    color: var(--bh-gray-500);
    font-size: 0.85rem;
}

/* ============================================
   Dashboard
   ============================================ */
.dashboard-welcome {
    margin-bottom: var(--space-xl);
}

.dashboard-welcome h1 {
    margin-bottom: var(--space-xs);
}

.dashboard-welcome p {
    color: var(--bh-gray-500);
    margin-bottom: 0;
}

.stats-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

@media (min-width: 768px) {
    .stats-row {
        grid-template-columns: 1fr 1fr 1fr 1fr;
    }
}

.stat-card {
    background: var(--bh-white);
    border: 1px solid var(--bh-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
}

.stat-number {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--bh-navy);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--bh-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.dashboard-section {
    margin-bottom: var(--space-xl);
}

.dashboard-section h2 {
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
}

.dashboard-cta-card {
    background: var(--bh-white);
    border: 1px solid var(--bh-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

@media (min-width: 768px) {
    .dashboard-cta-card {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

.dashboard-cta-card p {
    color: var(--bh-gray-500);
    margin-bottom: 0;
    font-size: 0.9rem;
}

.construct-mini-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

@media (min-width: 600px) {
    .construct-mini-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 960px) {
    .construct-mini-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

.construct-mini-card {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    border: 1px solid var(--bh-gray-200);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--bh-gray-300);
    font-size: 0.85rem;
}

.construct-mini-card .mini-name {
    flex: 1;
    font-weight: 600;
    color: var(--bh-gray-700);
}

.construct-mini-card .mini-accuracy {
    color: var(--bh-gray-500);
    font-size: 0.8rem;
}

.upgrade-banner {
    background: linear-gradient(135deg, var(--bh-navy) 0%, var(--bh-navy-light) 100%);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    color: var(--bh-white);
    margin-top: var(--space-xl);
}

.upgrade-banner h3 {
    color: var(--bh-white);
    margin-bottom: var(--space-sm);
}

.upgrade-banner p {
    color: var(--bh-gray-300);
    margin-bottom: var(--space-md);
    font-size: 0.9rem;
}

/* ============================================
   Session Summary
   ============================================ */
.session-summary {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
    padding: var(--space-2xl) 0;
}

.session-summary h2 {
    margin-bottom: var(--space-md);
}

.summary-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    margin: var(--space-xl) 0;
}

.summary-stat {
    text-align: center;
}

.summary-stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--bh-navy);
    display: block;
}

.summary-stat-label {
    font-size: 0.85rem;
    color: var(--bh-gray-500);
}

.summary-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   Loading Spinner
   ============================================ */
.loading-spinner {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3xl);
    color: var(--bh-gray-500);
    font-size: 0.95rem;
}

.spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--bh-gray-200);
    border-top-color: var(--bh-navy);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-right: var(--space-sm);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============================================
   App Footer (simplified for app pages)
   ============================================ */
.app-footer {
    background: var(--bh-navy-dark);
    color: var(--bh-gray-500);
    padding: var(--space-lg) 0;
    margin-top: var(--space-3xl);
    font-size: 0.8rem;
    text-align: center;
}

.app-footer a {
    color: var(--bh-gray-300);
    text-decoration: none;
}

.app-footer a:hover {
    color: var(--bh-white);
}

/* ============================================
   Item & Stimulus Images
   ============================================ */
.item-image-wrapper,
.stimulus-image-wrapper {
    margin: var(--space-md) 0;
    text-align: center;
}

.item-image,
.stimulus-image {
    max-width: 100%;
    max-height: 400px;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
    display: block;
    margin: 0 auto;
}

.image-loading-placeholder {
    padding: var(--space-md);
    color: var(--bh-gray-400);
    font-size: 0.875rem;
    text-align: center;
}

.image-error-placeholder {
    padding: var(--space-sm) var(--space-md);
    color: var(--bh-gray-400);
    font-size: 0.85rem;
    font-style: italic;
    text-align: center;
}

@media (max-width: 600px) {
    .item-image,
    .stimulus-image {
        max-width: 100%;
        border-radius: var(--radius-sm);
    }
}

/* ============================================
   Content Copy Protection
   ============================================ */
.protected-content {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.protected-content img {
    -webkit-user-drag: none;
    user-select: none;
    pointer-events: none;
}

/* ============================================
   Locked Constructs (Free Tier)
   ============================================ */
.construct-locked {
    opacity: 0.55;
    cursor: pointer;
    position: relative;
}

.construct-locked:hover {
    opacity: 0.7;
}

.lock-badge {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--bh-gray-500);
    background: var(--bh-gray-100);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    margin-top: var(--space-xs);
}

.construct-coming-soon {
    opacity: 0.55;
    cursor: default;
}

.coming-soon-badge {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--bh-primary);
    background: var(--bh-gray-100);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    margin-top: var(--space-xs);
}

/* ============================================
   Free Items Indicator
   ============================================ */
.free-items-indicator {
    background: var(--bh-gray-100);
    color: var(--bh-gray-600);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    margin-bottom: var(--space-md);
    text-align: center;
}

/* ============================================
   Limit Reached Card
   ============================================ */
.limit-reached-card {
    max-width: 520px;
    margin: var(--space-2xl) auto;
    text-align: center;
    padding: var(--space-2xl);
    background: var(--bh-white);
    border-radius: var(--radius-lg);
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.limit-reached-card h3 {
    color: var(--bh-navy);
    margin-bottom: var(--space-sm);
}

.limit-reached-card p {
    color: var(--bh-gray-600);
    margin-bottom: var(--space-md);
    font-size: 0.95rem;
}

.limit-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--space-lg);
}

/* ============================================
   Simulation Picker
   ============================================ */
.sim-picker {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-2xl) 0;
    text-align: center;
}

.sim-picker h1 {
    margin-bottom: var(--space-xs);
}

.sim-picker-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-xl);
    text-align: left;
}

.sim-picker-card {
    background: var(--bh-white);
    border: 2px solid var(--bh-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    cursor: pointer;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.sim-picker-card:hover,
.sim-picker-card:focus-visible {
    border-color: var(--bh-navy);
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.sim-picker-card.locked {
    opacity: 0.55;
    cursor: not-allowed;
}

.sim-picker-card .card-kind {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
}

.sim-picker-card .card-kind.kind-mini { background: var(--bh-blue-100); color: var(--bh-navy); }
.sim-picker-card .card-kind.kind-form { background: var(--bh-green-100, #d4edda); color: #155724; }
.sim-picker-card .card-kind.kind-behavioral { background: #fff3cd; color: #856404; }

.sim-picker-card .card-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--bh-navy);
}

.sim-picker-card .card-meta {
    font-size: 0.85rem;
    color: var(--bh-gray-600);
}

.sim-picker-card .card-lock {
    font-size: 0.8rem;
    color: var(--bh-gray-500);
    margin-top: var(--space-sm);
    font-style: italic;
}

/* ============================================
   Simulation Intro (instructions before start)
   ============================================ */
.sim-intro {
    max-width: 640px;
    margin: 0 auto;
    padding: var(--space-2xl) 0;
    text-align: center;
}

.sim-intro-details {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    margin: var(--space-lg) 0;
    flex-wrap: wrap;
}

.sim-intro-details .detail-item {
    text-align: center;
}

.sim-intro-details .detail-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--bh-navy);
}

.sim-intro-details .detail-label {
    font-size: 0.8rem;
    color: var(--bh-gray-600);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.sim-instructions {
    text-align: left;
    background: var(--bh-gray-50);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    margin: var(--space-lg) 0;
    font-size: 0.9rem;
    line-height: 1.6;
}

.sim-instructions ul {
    margin: var(--space-sm) 0;
    padding-left: var(--space-lg);
}

.sim-instructions li {
    margin-bottom: var(--space-xs);
}

/* ============================================
   Simulation Top Bar (during test)
   ============================================ */
.sim-topbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bh-navy);
    color: var(--bh-white);
    padding: var(--space-sm) 0;
    font-size: 0.85rem;
}

.sim-topbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sim-topbar .sim-title {
    font-weight: 600;
}

.sim-topbar .sim-timer {
    font-variant-numeric: tabular-nums;
    font-weight: 600;
}

.sim-topbar .sim-timer.timer-warning {
    color: #ffc107;
}

.sim-topbar .sim-timer.timer-danger {
    color: #ff4444;
    animation: timer-pulse 1s infinite;
}

@keyframes timer-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ============================================
   Behavioral Item (Likert Scale)
   ============================================ */
.behavioral-item {
    max-width: 640px;
    margin: 0 auto;
}

.behavioral-item .item-stem {
    font-size: 1.05rem;
    margin-bottom: var(--space-lg);
    line-height: 1.5;
}

.likert-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.likert-option {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--bh-gray-200);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
    font-size: 0.95rem;
}

.likert-option:hover {
    border-color: var(--bh-navy);
    background: var(--bh-blue-50, #f0f4ff);
}

.likert-option.selected {
    border-color: var(--bh-navy);
    background: var(--bh-blue-100);
    font-weight: 600;
}

.likert-option input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--bh-navy);
}

/* ============================================
   Behavioral Feedback (results page)
   ============================================ */
.behavioral-disclaimer {
    background: var(--bh-gray-50);
    border-left: 4px solid var(--bh-navy);
    padding: var(--space-md) var(--space-lg);
    margin-bottom: var(--space-xl);
    font-size: 0.9rem;
    color: var(--bh-gray-700);
    border-radius: var(--radius-sm);
}

.behavioral-flags {
    margin-bottom: var(--space-xl);
}

.behavioral-flag {
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: var(--radius-sm);
    padding: var(--space-sm) var(--space-md);
    margin-bottom: var(--space-sm);
    font-size: 0.85rem;
    color: #856404;
}

.domain-chart {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.domain-row {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.domain-label {
    flex: 0 0 140px;
    font-size: 0.85rem;
    font-weight: 500;
    text-align: right;
    color: var(--bh-gray-700);
}

.domain-bar-wrap {
    flex: 1;
    position: relative;
    height: 24px;
    background: var(--bh-gray-100);
    border-radius: var(--radius-sm);
    overflow: visible;
    display: flex;
    align-items: center;
}

.domain-bar {
    height: 100%;
    border-radius: var(--radius-sm);
    min-width: 4px;
    transition: width 0.3s ease;
}

.domain-bar-high { background: #28a745; }
.domain-bar-moderate { background: #ffc107; }
.domain-bar-growth { background: #dc3545; }

.domain-score-label {
    position: absolute;
    right: var(--space-sm);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--bh-gray-700);
}

.domain-insufficient {
    font-size: 0.8rem;
    color: var(--bh-gray-500);
    font-style: italic;
    padding-left: var(--space-sm);
}

.domain-legend {
    display: flex;
    gap: var(--space-lg);
    justify-content: center;
    margin-bottom: var(--space-xl);
    font-size: 0.8rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.legend-swatch {
    display: inline-block;
    width: 14px;
    height: 14px;
    border-radius: 3px;
}

.domain-detail {
    border: 1px solid var(--bh-gray-200);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
}

.domain-detail summary {
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.domain-detail-body {
    padding: 0 var(--space-md) var(--space-md);
}

.domain-about {
    font-size: 0.85rem;
    margin-bottom: var(--space-sm);
}

.band-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 2px 6px;
    border-radius: 3px;
}

.band-high { background: #d4edda; color: #155724; }
.band-moderate { background: #fff3cd; color: #856404; }
.band-growth { background: #f8d7da; color: #721c24; }

.behavioral-footer {
    margin-top: var(--space-2xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--bh-gray-200);
    font-size: 0.85rem;
    color: var(--bh-gray-600);
}

@media (max-width: 600px) {
    .sim-picker-grid {
        grid-template-columns: 1fr;
    }

    .domain-label {
        flex: 0 0 100px;
        font-size: 0.75rem;
    }

    .domain-legend {
        flex-direction: column;
        align-items: center;
        gap: var(--space-sm);
    }

    .sim-topbar .sim-title {
        display: none;
    }
}