/* ==========================================================================
   MATHBHOOT Curriculum Explorer Stylesheet
   Theme: Stat Card 02 Electric-Blue & Midnight-Black Aesthetics (--tone: #2883b7)
   ========================================================================== */

:root {
    --curr-blue: #2883b7;
    --curr-blue-bright: #3a9fd8;
    --curr-blue-glow: rgba(40, 131, 183, 0.45);
    --curr-cyan: #5cd0ff;
    --curr-bg-dark: #030404;
    --curr-bg-card: #07090b;
    --curr-border-blue: rgba(40, 131, 183, 0.35);
    --curr-text-main: #f0f4f8;
    --curr-text-muted: #94a3b8;
    --curr-gold: #c89b4b;
}

body.curriculum-page {
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    color: var(--curr-text-main);
    background:
        radial-gradient(circle at 15% 12%, rgba(40, 131, 183, 0.18), transparent 35rem),
        radial-gradient(circle at 85% 88%, rgba(58, 159, 216, 0.12), transparent 30rem),
        var(--curr-bg-dark);
    font-family: Georgia, "Times New Roman", serif;
    margin: 0;
    padding: 0;
}

body.curriculum-page::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    opacity: 0.35;
    background-image:
        repeating-linear-gradient(0deg, rgba(40, 131, 183, 0.03) 0 1px, transparent 1px 6px),
        radial-gradient(circle, rgba(40, 131, 183, 0.12) 0 .8px, transparent 1px);
    background-size: auto, 24px 24px;
}

.curriculum-shell {
    flex: 1;
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 4rem;
}

/* Header & Navbar consistency */
.curriculum-page .navbar {
    min-height: var(--global-header-height, 70px);
    border-bottom: 1px solid rgba(40, 131, 183, 0.25);
    background: #000;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

.curriculum-page .nav-links a {
    color: #fff;
    transition: color 0.3s ease, text-shadow 0.3s ease, background 0.3s ease;
}

.curriculum-page .nav-links a:hover,
.curriculum-page .nav-links a:focus-visible,
.curriculum-page .nav-links a.active {
    color: var(--curr-cyan) !important;
    text-shadow: 0 0 12px var(--curr-blue-glow);
    background: rgba(40, 131, 183, 0.18);
    border-radius: 6px;
}

/* Hero Section */
.curriculum-hero {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 3rem 1.5rem 2.5rem;
    margin-bottom: 2rem;
    border-radius: 16px;
    border: 1px solid var(--curr-border-blue);
    background: radial-gradient(circle at 50% 30%, rgba(40, 131, 183, 0.15), var(--curr-bg-card) 90%);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6), inset 0 0 25px rgba(40, 131, 183, 0.1);
}

.curriculum-hero .hero-sigil {
    font-size: 2.5rem;
    color: var(--curr-cyan);
    text-shadow: 0 0 16px var(--curr-blue-glow);
    display: block;
    margin-bottom: 0.5rem;
    text-align: center;
}

.curriculum-hero .eyebrow {
    color: var(--curr-blue-bright);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    margin: 0 0 0.5rem;
    text-align: center;
}

.curriculum-hero h1 {
    font-size: clamp(2rem, 4vw, 3.2rem);
    color: #fff;
    margin: 0 0 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    text-shadow: 0 0 20px rgba(40, 131, 183, 0.6);
    text-align: center;
}

.curriculum-hero .hero-subtitle {
    color: var(--curr-cyan);
    font-size: 1.15rem;
    font-style: italic;
    margin: 0 0 1rem;
    text-align: center;
}

.curriculum-hero .hero-copy {
    max-width: 780px;
    margin: 0 auto;
    color: var(--curr-text-muted);
    font-size: 1.05rem;
    line-height: 1.6;
    text-align: center;
}

/* AI Entity Definition Block */
.ai-entity-block {
    margin-bottom: 2.25rem;
    padding: 1.5rem 1.75rem;
    border-radius: 12px;
    border: 1px solid rgba(40, 131, 183, 0.3);
    background: radial-gradient(circle at 0% 0%, rgba(40, 131, 183, 0.08), var(--curr-bg-card) 70%);
    box-shadow: inset 0 0 15px rgba(40, 131, 183, 0.05);
}

.ai-entity-block h2 {
    font-size: 1.2rem;
    color: var(--curr-cyan);
    margin: 0 0 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.ai-entity-block p {
    font-size: 0.96rem;
    color: #d1d5db;
    line-height: 1.6;
    margin: 0;
}

/* Search & Controls */
.curr-controls {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-bottom: 2.5rem;
}

.curr-search-box {
    position: relative;
    width: 100%;
}

.curr-search-box input {
    width: 100%;
    min-height: 52px;
    padding: 0.85rem 3.5rem 0.85rem 1.25rem;
    border: 1px solid var(--curr-border-blue);
    border-radius: 10px;
    color: #fff;
    background: rgba(7, 9, 11, 0.9);
    font-family: inherit;
    font-size: 1rem;
    box-shadow: inset 0 2px 8px rgba(0,0,0,0.5);
    transition: border-color 0.3s, box-shadow 0.3s;
}

.curr-search-box input:focus {
    outline: none;
    border-color: var(--curr-blue-bright);
    box-shadow: 0 0 15px var(--curr-blue-glow);
}

.curr-search-box button {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--curr-cyan);
    font-size: 1.4rem;
    cursor: pointer;
    padding: 8px 12px;
    border-radius: 6px;
}

.curr-filter-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.curr-pill {
    padding: 0.55rem 1.2rem;
    border-radius: 20px;
    border: 1px solid rgba(40, 131, 183, 0.3);
    background: rgba(7, 9, 11, 0.8);
    color: var(--curr-text-muted);
    font-size: 0.88rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.25s ease;
}

.curr-pill:hover,
.curr-pill:focus-visible,
.curr-pill.active {
    color: #fff;
    background: rgba(40, 131, 183, 0.25);
    border-color: var(--curr-blue-bright);
    box-shadow: 0 0 12px var(--curr-blue-glow);
    outline: none;
}

/* Stage Grid */
.stage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stage-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 1.6rem;
    border-radius: 14px;
    border: 1px solid var(--curr-border-blue);
    background: radial-gradient(circle at 50% 0%, rgba(40, 131, 183, 0.12), var(--curr-bg-card) 80%);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
    transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
    text-decoration: none;
    color: inherit;
}

.stage-card:hover,
.stage-card:focus-visible {
    transform: translateY(-4px);
    border-color: var(--curr-blue-bright);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.7), 0 0 20px var(--curr-blue-glow);
    outline: none;
}

.stage-card .card-icon {
    font-size: 2.2rem;
    margin-bottom: 0.75rem;
}

.stage-card .stage-range {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--curr-cyan);
    margin-bottom: 0.35rem;
}

.stage-card h2 {
    font-size: 1.35rem;
    color: #fff;
    margin: 0 0 0.5rem;
    line-height: 1.3;
}

.stage-card p {
    font-size: 0.92rem;
    color: var(--curr-text-muted);
    line-height: 1.5;
    margin: 0 0 1.25rem;
    flex: 1;
}

.stage-card .btn-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 0.7rem 1.2rem;
    border-radius: 8px;
    border: 1px solid var(--curr-blue-bright);
    background: rgba(40, 131, 183, 0.2);
    color: #fff;
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    transition: background 0.3s, box-shadow 0.3s;
}

.stage-card:hover .btn-cta {
    background: var(--curr-blue);
    box-shadow: 0 0 15px var(--curr-blue-glow);
}

/* Progress Banner */
.progress-banner {
    padding: 2rem 1.75rem;
    border-radius: 14px;
    border: 1px solid rgba(40, 131, 183, 0.3);
    background: radial-gradient(circle at 100% 100%, rgba(40, 131, 183, 0.15), var(--curr-bg-card) 80%);
    box-shadow: 0 6px 20px rgba(0,0,0,0.5);
    margin-top: 1rem;
}

.progress-banner .banner-badge {
    display: inline-block;
    padding: 0.35rem 0.85rem;
    border-radius: 12px;
    background: rgba(40, 131, 183, 0.25);
    border: 1px solid var(--curr-blue-bright);
    color: var(--curr-cyan);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

.progress-banner h3 {
    font-size: 1.3rem;
    color: #fff;
    margin: 0 0 0.5rem;
}

.progress-banner p {
    font-size: 0.95rem;
    color: var(--curr-text-muted);
    line-height: 1.6;
    margin: 0;
}

/* Breadcrumbs */
.curr-breadcrumbs {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--curr-text-muted);
    margin-bottom: 1.75rem;
}

.curr-breadcrumbs a {
    color: var(--curr-cyan);
    text-decoration: none;
}

.curr-breadcrumbs a:hover {
    text-decoration: underline;
}

.curr-breadcrumbs .sep {
    color: rgba(255, 255, 255, 0.3);
}

/* Topic Workspace Tabs */
.topic-workspace {
    border-radius: 16px;
    border: 1px solid var(--curr-border-blue);
    background: var(--curr-bg-card);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    overflow: hidden;
}

.workspace-nav {
    display: flex;
    overflow-x: auto;
    border-bottom: 1px solid var(--curr-border-blue);
    background: rgba(3, 4, 4, 0.95);
}

.workspace-nav button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.35rem;
    border: none;
    background: transparent;
    color: var(--curr-text-muted);
    font-family: inherit;
    font-size: 0.92rem;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    border-bottom: 3px solid transparent;
    transition: all 0.25s ease;
}

.workspace-nav button:hover,
.workspace-nav button:focus-visible,
.workspace-nav button.active {
    color: #fff;
    background: rgba(40, 131, 183, 0.15);
    border-bottom-color: var(--curr-blue-bright);
    outline: none;
}

.tab-panel {
    display: none;
    padding: 2rem 1.75rem;
}

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

/* Learn Panel */
.learn-box h3 {
    font-size: 1.5rem;
    color: var(--curr-cyan);
    margin: 0 0 1rem;
}

.learn-box .section-block {
    margin-bottom: 1.5rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.learn-box h4 {
    font-size: 1.1rem;
    color: #fff;
    margin: 0 0 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.learn-box p, .learn-box li {
    font-size: 0.98rem;
    line-height: 1.65;
    color: #e2e8f0;
}

/* Quiz Interface */
.quiz-box {
    max-width: 750px;
    margin: 0 auto;
}

.quiz-progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.quiz-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--curr-blue), var(--curr-cyan));
    transition: width 0.35s ease;
}

.quiz-option-btn {
    display: block;
    width: 100%;
    text-align: left;
    padding: 0.9rem 1.2rem;
    margin-bottom: 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--curr-border-blue);
    background: rgba(255, 255, 255, 0.03);
    color: #fff;
    font-family: inherit;
    font-size: 0.98rem;
    cursor: pointer;
    transition: all 0.25s ease;
}

.quiz-option-btn:hover,
.quiz-option-btn:focus-visible {
    background: rgba(40, 131, 183, 0.2);
    border-color: var(--curr-blue-bright);
    outline: none;
}

.quiz-option-btn.correct {
    background: rgba(34, 197, 94, 0.2);
    border-color: #22c55e;
}

.quiz-option-btn.incorrect {
    background: rgba(239, 68, 68, 0.2);
    border-color: #ef4444;
}

/* SVG Visualizer Container */
.visualizer-container {
    width: 100%;
    min-height: 280px;
    border-radius: 12px;
    border: 1px solid var(--curr-border-blue);
    background: radial-gradient(circle at 50% 50%, rgba(40, 131, 183, 0.1), #030404 85%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.8);
}

.visualizer-container svg {
    max-width: 100%;
    height: auto;
}

/* Game Connection Card */
.game-connection-card {
    padding: 1.75rem;
    border-radius: 12px;
    border: 1px solid var(--curr-border-blue);
    background: radial-gradient(circle at 100% 0%, rgba(152, 57, 189, 0.15), var(--curr-bg-card) 70%);
}

.game-connection-card .status-tag {
    display: inline-block;
    padding: 0.35rem 0.85rem;
    border-radius: 12px;
    background: rgba(152, 57, 189, 0.3);
    border: 1px solid #9839bd;
    color: #e9d5ff;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

/* Responsive Rules */
@media (max-width: 768px) {
    .curriculum-shell {
        padding: 1.5rem 1rem 3rem;
    }
    .stage-grid {
        grid-template-columns: 1fr;
    }
    .tab-panel {
        padding: 1.25rem 1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, ::before, ::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}