@import url('https://fonts.googleapis.com/css2?family=Cabin:ital,wght@0,400;0,500;0,600;0,700;1,400;1,600&family=JetBrains+Mono:wght@400;500;600;700&family=Vazirmatn:wght@300;400;500;600;700;800;900&display=swap');

:root {
    /* Cabin / Crypto-Predictor Warm Editorial Palette */
    --cabin-taupe: #B5A18B;
    --cabin-taupe-light: #F4EFEA;
    --cabin-yellow: #FFCF68;
    --cabin-yellow-light: #FFF8E7;
    --cabin-cream: #EDE8E1;
    --cabin-dark: #201F1E;

    --bg-main: #ECE7DF;
    --bg-surface: #FFFFFF;
    --bg-surface-elevated: #F9F7F4;
    --border-main: #E3DDD4;
    --border-subtle: #EFECE6;
    --text-primary: #201F1E;
    --text-secondary: #5C564F;
    --text-muted: #8C847B;

    /* Semantic Status Accents */
    --accent-gold: #FFCF68;
    --accent-emerald: #10B981;
    --accent-emerald-light: #EBF7EE;
    --accent-rose: #F43F5E;
    --accent-rose-light: #FEECEF;
    --accent-taupe: #B5A18B;

    --card-shadow: 0 2px 10px -2px rgba(32, 31, 30, 0.04), 0 1px 3px -1px rgba(32, 31, 30, 0.03);
    --card-shadow-hover: 0 12px 28px -6px rgba(32, 31, 30, 0.08), 0 4px 10px -2px rgba(32, 31, 30, 0.04);
}

.dark {
    --cabin-taupe: #B5A18B;
    --cabin-taupe-light: rgba(181, 161, 139, 0.15);
    --cabin-yellow: #FFCF68;
    --cabin-yellow-light: rgba(255, 207, 104, 0.12);
    --cabin-cream: #201F1E;
    --cabin-dark: #FFFFFF;

    --bg-main: #181716;
    --bg-surface: #242220;
    --bg-surface-elevated: #2D2B28;
    --border-main: #383531;
    --border-subtle: #2C2A27;
    --text-primary: #F5F2EB;
    --text-secondary: #C4BDB3;
    --text-muted: #8E877E;

    --accent-gold: #FFCF68;
    --accent-emerald: #34D399;
    --accent-emerald-light: rgba(52, 211, 153, 0.12);
    --accent-rose: #FB7185;
    --accent-rose-light: rgba(251, 113, 133, 0.12);
    --accent-taupe: #B5A18B;

    --card-shadow: 0 4px 12px -2px rgba(0, 0, 0, 0.5), 0 2px 6px -2px rgba(0, 0, 0, 0.3);
    --card-shadow-hover: 0 16px 32px -4px rgba(0, 0, 0, 0.6), 0 6px 12px -2px rgba(0, 0, 0, 0.4);
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: 'Vazirmatn', 'Cabin', system-ui, -apple-system, sans-serif;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
    transition: background-color 0.25s ease, color 0.25s ease;
    line-height: 1.8;
}

.font-mono,
code,
pre {
    font-family: 'JetBrains Mono', 'Vazirmatn', monospace !important;
}

/* Organic Rounded Cards (Cabin & Crypto-Predictor style) */
.crypto-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-main);
    box-shadow: var(--card-shadow);
    border-radius: 1.25rem;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.crypto-card-interactive:hover {
    box-shadow: var(--card-shadow-hover);
    border-color: var(--cabin-taupe);
}

.dark .crypto-card-interactive:hover {
    border-color: rgba(255, 207, 104, 0.4);
}

/* Featured Yellow Card */
.card-featured-yellow {
    background-color: #FFCF68 !important;
    color: #201F1E !important;
    border: 1px solid #F5C252 !important;
    box-shadow: 0 8px 20px -4px rgba(255, 207, 104, 0.35) !important;
}

/* Ambient Golden Glow Orbs */
.bg-orb-1 {
    position: fixed;
    bottom: -15%;
    left: -10%;
    width: 55vw;
    height: 55vw;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 207, 104, 0.16) 0%, rgba(181, 161, 139, 0.09) 45%, rgba(236, 231, 223, 0) 70%);
    filter: blur(90px);
    pointer-events: none;
    z-index: 0;
}

.bg-orb-2 {
    position: fixed;
    top: -15%;
    right: -10%;
    width: 45vw;
    height: 45vw;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(181, 161, 139, 0.14) 0%, rgba(255, 207, 104, 0.08) 45%, rgba(236, 231, 223, 0) 70%);
    filter: blur(90px);
    pointer-events: none;
    z-index: 0;
}

.dark .bg-orb-1 {
    background: radial-gradient(circle, rgba(255, 207, 104, 0.07) 0%, rgba(181, 161, 139, 0.04) 45%, rgba(0, 0, 0, 0) 70%);
}

.dark .bg-orb-2 {
    background: radial-gradient(circle, rgba(181, 161, 139, 0.06) 0%, rgba(255, 207, 104, 0.04) 45%, rgba(0, 0, 0, 0) 70%);
}

/* Module Pill Buttons */
.module-pill-btn {
    border-radius: 9999px;
    padding: 0.45rem 0.9rem;
    font-size: 0.8125rem;
    font-weight: 700;
    transition: all 0.2s ease;
    color: var(--text-secondary);
    background-color: var(--bg-surface);
    border: 1px solid var(--border-main);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    cursor: pointer;
}

.module-pill-btn:hover {
    color: var(--text-primary);
    border-color: var(--cabin-taupe);
    transform: translateY(-1px);
}

.module-pill-btn.active {
    background-color: #201F1E !important;
    color: #FFFFFF !important;
    border-color: #201F1E !important;
    box-shadow: 0 4px 12px -2px rgba(32, 31, 30, 0.25);
}

.dark .module-pill-btn.active {
    background-color: #FFCF68 !important;
    color: #201F1E !important;
    border-color: #FFCF68 !important;
    box-shadow: 0 4px 12px -2px rgba(255, 207, 104, 0.3);
}

/* Step Dots in Step Bar */
.step-dot-btn {
    width: 2rem;
    height: 2rem;
    border-radius: 0.65rem;
    font-size: 0.75rem;
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-main);
    background-color: var(--bg-surface-elevated);
    color: var(--text-secondary);
    transition: all 0.18s ease;
    cursor: pointer;
    flex-shrink: 0;
}

.step-dot-btn:hover {
    border-color: var(--cabin-taupe);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.step-dot-btn.active {
    background-color: #FFCF68 !important;
    color: #201F1E !important;
    border-color: #E6B44C !important;
    box-shadow: 0 3px 10px -1px rgba(255, 207, 104, 0.45);
    transform: scale(1.06);
}

.step-dot-btn.completed:not(.active) {
    background-color: var(--accent-emerald-light);
    color: #15803D;
    border-color: rgba(16, 185, 129, 0.35);
}

.dark .step-dot-btn.completed:not(.active) {
    color: #34D399;
}

/* Lesson Prose Formatting */
.lesson-prose {
    color: var(--text-primary);
    font-size: 0.975rem;
    line-height: 1.95;
}

.lesson-prose h2 {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-top: 1.75rem;
    margin-bottom: 0.85rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.lesson-prose h2::before {
    content: "";
    display: inline-block;
    width: 0.45rem;
    height: 1.25rem;
    border-radius: 999px;
    background-color: #FFCF68;
    flex-shrink: 0;
}

.lesson-prose h3 {
    font-size: 1.125rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-top: 1.35rem;
    margin-bottom: 0.6rem;
}

.lesson-prose h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-top: 1.1rem;
    margin-bottom: 0.45rem;
}

.lesson-prose p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.lesson-prose ul,
.lesson-prose ol {
    margin-bottom: 1.15rem;
    padding-right: 1.4rem;
    color: var(--text-secondary);
}

.lesson-prose ul {
    list-style-type: disc;
}

.lesson-prose ol {
    list-style-type: decimal;
}

.lesson-prose li {
    margin-bottom: 0.45rem;
}

.lesson-prose strong,
.lesson-prose b {
    color: var(--text-primary);
    font-weight: 800;
}

/* Inline Code */
.lesson-prose :not(pre) > code {
    direction: ltr;
    unicode-bidi: embed;
    display: inline-block;
    padding: 0.1rem 0.45rem;
    margin: 0 0.15rem;
    font-size: 0.825rem;
    font-weight: 600;
    border-radius: 0.45rem;
    background-color: var(--cabin-taupe-light);
    color: #201F1E;
    border: 1px solid var(--border-main);
}

.dark .lesson-prose :not(pre) > code {
    background-color: #2D2B28;
    color: #FFCF68;
    border-color: #383531;
}

/* Blockquotes & Callouts */
.lesson-prose blockquote {
    margin: 1.25rem 0;
    padding: 1rem 1.25rem;
    border-right: 4px solid #FFCF68;
    background-color: var(--cabin-yellow-light);
    border-radius: 0.85rem;
    color: var(--text-primary);
    font-size: 0.925rem;
}

/* Tables inside Lesson Prose */
.lesson-prose table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 1.25rem 0;
    font-size: 0.875rem;
    border: 1px solid var(--border-main);
    border-radius: 0.85rem;
    overflow: hidden;
}

.lesson-prose th {
    background-color: var(--bg-surface-elevated);
    color: var(--text-primary);
    font-weight: 800;
    text-align: right;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-main);
}

.lesson-prose td {
    padding: 0.7rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    vertical-align: top;
}

.lesson-prose tr:last-child td {
    border-bottom: none;
}

.lesson-prose tr:hover td {
    background-color: var(--cabin-taupe-light);
}

/* Code Block Container (LTR Terminal Style) */
.code-block-wrapper {
    direction: ltr;
    text-align: left;
    margin: 1.15rem 0;
    border-radius: 1rem;
    overflow: hidden;
    background-color: #181716;
    border: 1px solid #383531;
    box-shadow: 0 6px 18px -4px rgba(0, 0, 0, 0.25);
}

.code-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.55rem 1rem;
    background-color: #242220;
    border-bottom: 1px solid #383531;
    color: #B5AEA4;
    font-size: 0.75rem;
}

.code-block-pre {
    margin: 0 !important;
    padding: 1rem 1.2rem !important;
    overflow-x: auto;
    font-size: 0.84rem;
    line-height: 1.7;
    color: #F5F2EB;
    background-color: #181716 !important;
    direction: ltr !important;
    text-align: left !important;
}

.code-block-pre:focus-visible {
    outline: 2px solid #FFCF68;
    outline-offset: -2px;
}

/* Native Details / Summary Disclosure Styling */
details.exercise-disclosure {
    border: 1px solid var(--border-main);
    border-radius: 0.9rem;
    background-color: var(--bg-surface-elevated);
    overflow: hidden;
    transition: all 0.2s ease;
}

details.exercise-disclosure[open] {
    border-color: var(--cabin-taupe);
}

details.exercise-disclosure > summary {
    padding: 0.8rem 1.1rem;
    font-weight: 800;
    font-size: 0.875rem;
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    user-select: none;
}

details.exercise-disclosure > summary::-webkit-details-marker {
    display: none;
}

details.exercise-disclosure > summary:hover {
    background-color: var(--cabin-taupe-light);
}

/* Native Dialog (Table of Contents Modal) */
dialog#tocDialog {
    border: 1px solid var(--border-main);
    border-radius: 1.5rem;
    background-color: var(--bg-surface);
    color: var(--text-primary);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.45);
    width: min(94vw, 58rem);
    max-height: 86vh;
    padding: 0;
    margin: auto;
    overflow: hidden;
}

dialog#tocDialog[open] {
    display: flex;
    flex-direction: column;
}

dialog#tocDialog::backdrop {
    background: rgba(24, 23, 22, 0.65);
    backdrop-filter: blur(5px);
}

/* Toast Notification */
#toastContainer {
    position: fixed;
    bottom: 1.25rem;
    left: 1.25rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

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

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

::-webkit-scrollbar-thumb {
    background: #D3CCC2;
    border-radius: 9999px;
}

.dark ::-webkit-scrollbar-thumb {
    background: #45403B;
}

::-webkit-scrollbar-thumb:hover {
    background: #B5A18B;
}