/* ═══════════════════════════════════════════════════════
   BLOCKCHAIN COURSE — PART 1 PROJECT  ·  Extra CSS
   ═══════════════════════════════════════════════════════
   Light theme overrides, premium polish, and additional
   styles for the Part 1 project page.
   ═══════════════════════════════════════════════════════ */

/* ── Lesson card purple variant ────────────────────────── */
.lesson-card.card-purple {
    border-left: 4px solid var(--accent-eth, #8b5cf6);
    background: rgba(139, 92, 246, 0.04);
}
[data-theme="light"] .lesson-card.card-purple {
    background: rgba(124, 58, 237, 0.04);
}

/* ═══════════════════════════════════════════════════════
   LIGHT THEME OVERRIDES
   ═══════════════════════════════════════════════════════ */

/* ── Step cards ────────────────────────────────────────── */
[data-theme="light"] .step-card {
    background: #fff;
    border-color: #e2e8f0;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
[data-theme="light"] .step-card:hover {
    border-color: #cbd5e1;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}
[data-theme="light"] .step-card-header {
    background: rgba(247,147,26,0.04);
    border-color: #e2e8f0;
}
[data-theme="light"] .step-card-body p { color: #475569; }
[data-theme="light"] .step-card-body ul { color: #475569; }
[data-theme="light"] .step-card-header h4 { color: #1e293b; }

/* ── Step test badge ───────────────────────────────────── */
[data-theme="light"] .step-test {
    background: rgba(5,150,105,0.06);
    border-color: rgba(5,150,105,0.18);
    color: #047857;
}

/* ── Miner cards ───────────────────────────────────────── */
[data-theme="light"] .miner-card {
    background: #fff;
    border-color: #e2e8f0;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
[data-theme="light"] .miner-card:hover {
    border-color: #cbd5e1;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}
[data-theme="light"] .miner-card h4 { color: #1e293b; }
[data-theme="light"] .miner-card p { color: #64748b; }
[data-theme="light"] .miner-level--beginner { background: rgba(5,150,105,0.08); color: #047857; }
[data-theme="light"] .miner-level--ambient  { background: rgba(8,145,178,0.08);  color: #0e7490; }
[data-theme="light"] .miner-level--advanced { background: rgba(217,119,6,0.08);  color: #b45309; }

/* ── Race flow steps ───────────────────────────────────── */
[data-theme="light"] .race-step {
    background: #fff;
    border-color: #e2e8f0;
}
[data-theme="light"] .race-step:hover {
    border-color: #cbd5e1;
}
[data-theme="light"] .race-step-content p { color: #475569; }
[data-theme="light"] .race-connector { background: #e2e8f0; }

/* ── Comparison table ──────────────────────────────────── */
[data-theme="light"] .comparison-table {
    border-color: #e2e8f0;
}
[data-theme="light"] .comparison-table th {
    background: #f8fafc;
    color: #1e293b;
    border-color: #e2e8f0;
}
[data-theme="light"] .comparison-table td {
    border-color: #e2e8f0;
    color: #475569;
}
[data-theme="light"] .comparison-table tr:hover td { background: rgba(217,119,6,0.03); }

/* ── API table light ───────────────────────────────────── */
[data-theme="light"] .api-table {
    border-color: #e2e8f0;
}
[data-theme="light"] .api-table th {
    background: #f8fafc;
    color: #1e293b;
    border-color: #e2e8f0;
}
[data-theme="light"] .api-table td {
    border-color: #e2e8f0;
    color: #475569;
}
[data-theme="light"] .api-table tr:hover td { background: rgba(217,119,6,0.03); }
[data-theme="light"] .api-method--post { background: rgba(5,150,105,0.1); color: #047857; }
[data-theme="light"] .api-method--get  { background: rgba(8,145,178,0.1);  color: #0e7490; }

/* ── Grading table light ───────────────────────────────── */
[data-theme="light"] .grading-table {
    border-color: #e2e8f0;
}
[data-theme="light"] .grading-table th {
    background: #f8fafc;
    color: #1e293b;
    border-color: #e2e8f0;
}
[data-theme="light"] .grading-table td {
    border-color: #e2e8f0;
    color: #475569;
}
[data-theme="light"] .grading-table tr:hover td { background: rgba(217,119,6,0.03); }
[data-theme="light"] .weight-badge--high { background: rgba(217,119,6,0.1);  color: #b45309; }
[data-theme="light"] .weight-badge--mid  { background: rgba(124,58,237,0.1); color: #7c3aed; }
[data-theme="light"] .weight-badge--low  { background: rgba(8,145,178,0.1);  color: #0e7490; }

/* ── Module ref table light ────────────────────────────── */
[data-theme="light"] .module-ref-table {
    border-color: #e2e8f0;
}
[data-theme="light"] .module-ref-table th {
    background: #f8fafc;
    color: #1e293b;
    border-color: #e2e8f0;
}
[data-theme="light"] .module-ref-table td {
    border-color: #e2e8f0;
    color: #475569;
}
[data-theme="light"] .module-ref-table tr:hover td { background: rgba(217,119,6,0.03); }
[data-theme="light"] .module-badge { background: rgba(217,119,6,0.08); color: #b45309; }

/* ── Deliverable cards light ───────────────────────────── */
[data-theme="light"] .deliverable-card {
    background: #fff;
    border-color: #e2e8f0;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
[data-theme="light"] .deliverable-card:hover {
    border-color: #cbd5e1;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}
[data-theme="light"] .deliverable-card h4 { color: #1e293b; }
[data-theme="light"] .deliverable-card p { color: #64748b; }

/* ── Extension cards light ─────────────────────────────── */
[data-theme="light"] .extension-card {
    background: #fff;
    border-color: #e2e8f0;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
[data-theme="light"] .extension-card:hover {
    border-color: #d97706;
    box-shadow: 0 6px 24px rgba(217,119,6,0.08);
}
[data-theme="light"] .extension-card h4 { color: #1e293b; }
[data-theme="light"] .extension-card p { color: #64748b; }
[data-theme="light"] .extension-bonus-badge { background: rgba(217,119,6,0.08); color: #b45309; }

/* ── Step tag light ────────────────────────────────────── */
[data-theme="light"] .step-tag--module { background: rgba(217,119,6,0.08); color: #b45309; }

/* ── Actor cards light ─────────────────────────────────── */
[data-theme="light"] .actor-card {
    background: #fff;
    border-color: #e2e8f0;
}
[data-theme="light"] .actor-card:hover { border-color: #cbd5e1; }
[data-theme="light"] .actor-name { color: #1e293b; }
[data-theme="light"] .actor-actions { color: #64748b; }
[data-theme="light"] .actor-role--publisher { background: rgba(124,58,237,0.08); color: #7c3aed; }
[data-theme="light"] .actor-role--consumer  { background: rgba(217,119,6,0.08);  color: #b45309; }
[data-theme="light"] .actor-role--auditor   { background: rgba(5,150,105,0.08);  color: #047857; }

/* ── Stack items light ─────────────────────────────────── */
[data-theme="light"] .stack-item {
    background: #fff;
    border-color: #e2e8f0;
}
[data-theme="light"] .stack-item:hover {
    border-color: #d97706;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}
[data-theme="light"] .stack-item .stack-name { color: #1e293b; }
[data-theme="light"] .stack-item .stack-desc { color: #64748b; }
[data-theme="light"] .stack-item .stack-module { color: #b45309; }

/* ═══════════════════════════════════════════════════════
   MISSING SYNTAX HIGHLIGHT CLASSES
   (module-style.css only has keyword/string/number/comment/function)
   ═══════════════════════════════════════════════════════ */

.hl-builtin  { color: #89ddff; }
.hl-operator { color: #89ddff; }
.hl-punct    { color: #89ddff; opacity: 0.7; }

[data-theme="light"] .hl-builtin  { color: #0891b2; }
[data-theme="light"] .hl-operator { color: #0891b2; }
[data-theme="light"] .hl-punct    { color: #64748b; opacity: 0.8; }

/* ═══════════════════════════════════════════════════════
   CODE BLOCK TOOLBAR — copy button + lang badge
   (blockchain module-style.css doesn't have these)
   ═══════════════════════════════════════════════════════ */

.code-block .code-lang {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent-primary, #f7931a);
    background: rgba(247, 147, 26, 0.1);
    padding: 0.2rem 0.55rem;
    border-radius: 5px;
    margin-left: auto;
}
[data-theme="light"] .code-block .code-lang {
    background: rgba(217, 119, 6, 0.08);
    color: #b45309;
}

.code-block .code-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.5rem;
    margin-bottom: 0.6rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
[data-theme="light"] .code-block .code-actions {
    border-bottom-color: rgba(0, 0, 0, 0.08);
}

.code-block .code-actions button {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: none;
    border: 1px solid var(--border-color, #1e2230);
    color: var(--text-tertiary, #7a8099);
    padding: 0.3rem 0.7rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.72rem;
    font-family: inherit;
    font-weight: 500;
    transition: all 0.2s ease;
    white-space: nowrap;
}
.code-block .code-actions button svg {
    flex-shrink: 0;
}

.code-block .code-actions .copy-btn:hover {
    background: rgba(247, 147, 26, 0.1);
    color: #f7931a;
    border-color: rgba(247, 147, 26, 0.35);
}
.code-block .code-actions .copy-btn.copied {
    color: #34d399;
    border-color: #34d399;
    background: rgba(52, 211, 153, 0.1);
}

[data-theme="light"] .code-block .code-actions button {
    border-color: #e2e8f0;
    color: #64748b;
}
[data-theme="light"] .code-block .code-actions .copy-btn:hover {
    background: rgba(217, 119, 6, 0.08);
    color: #b45309;
    border-color: rgba(217, 119, 6, 0.3);
}
[data-theme="light"] .code-block .code-actions .copy-btn.copied {
    color: #047857;
    border-color: #047857;
    background: rgba(5, 150, 105, 0.06);
}

/* ═══════════════════════════════════════════════════════
   ARCHITECTURE SVG DIAGRAM
   ═══════════════════════════════════════════════════════ */

.arch-svg-wrap {
    margin: 1.5rem 0;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color, #1e2230);
    background: var(--code-bg, #07090e);
    box-shadow: 0 4px 24px rgba(0,0,0,0.2);
}
.arch-svg {
    width: 100%;
    height: auto;
    display: block;
    --at: #f0f2ff;       /* text primary */
    --ad: #7a8099;       /* text dim */
    --ac: rgba(16,19,26,0.72);  /* card bg */
    --ab: rgba(10,12,16,0.35);  /* outer bg */
    --abr: #2e3450;      /* border */
}

[data-theme="light"] .arch-svg-wrap {
    background: #f1f5f9;
    border-color: #e2e8f0;
    box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}
[data-theme="light"] .arch-svg {
    --at: #1e293b;
    --ad: #475569;
    --ac: rgba(255,255,255,0.88);
    --ab: rgba(241,245,249,0.5);
    --abr: #cbd5e1;
}

@media (max-width: 600px) {
    .arch-svg-wrap {
        margin: 1rem -0.5rem;
        border-radius: 12px;
    }
}

/* ═══════════════════════════════════════════════════════
   FEATURE LIST (data/blocks commands)
   ═══════════════════════════════════════════════════════ */

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin: 1.2rem 0;
}
.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 0.9rem;
    padding: 0.9rem 1.1rem;
    background: var(--bg-card, rgba(16,19,26,0.88));
    border: 1px solid var(--border-color, #1e2230);
    border-left: 3px solid var(--accent-chain, #22d3ee);
    border-radius: 10px;
    transition: border-color 0.2s, transform 0.15s, box-shadow 0.2s;
}
.feature-item:hover {
    border-color: var(--accent-chain, #22d3ee);
    transform: translateX(4px);
    box-shadow: 0 2px 12px rgba(34,211,238,0.08);
}
.feature-item--danger {
    border-left-color: var(--accent-danger, #f87171);
}
.feature-item--danger:hover {
    border-color: var(--accent-danger, #f87171);
    box-shadow: 0 2px 12px rgba(248,113,113,0.08);
}
.feature-item--success {
    border-left-color: var(--accent-ok, #34d399);
}
.feature-item--success:hover {
    border-color: var(--accent-ok, #34d399);
    box-shadow: 0 2px 12px rgba(52,211,153,0.08);
}
.feature-icon {
    font-size: 1.3rem;
    flex-shrink: 0;
    width: 28px;
    text-align: center;
    line-height: 1;
    margin-top: 2px;
}
.feature-content {
    flex: 1;
    min-width: 0;
}
.feature-content code {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent-chain, #22d3ee);
    background: rgba(34,211,238,0.08);
    padding: 0.15em 0.5em;
    border-radius: 5px;
    margin-bottom: 0.3rem;
}
.feature-item--danger .feature-content code {
    color: var(--accent-danger, #f87171);
    background: rgba(248,113,113,0.08);
}
.feature-item--success .feature-content code {
    color: var(--accent-ok, #34d399);
    background: rgba(52,211,153,0.08);
}
.feature-content p {
    margin: 0;
    font-size: 0.88rem;
    color: var(--text-secondary, #c4c9e2);
    line-height: 1.5;
}

[data-theme="light"] .feature-item {
    background: #fff;
    border-color: #e2e8f0;
}
[data-theme="light"] .feature-item:hover { box-shadow: 0 2px 12px rgba(0,0,0,0.06); }
[data-theme="light"] .feature-content code {
    color: #0e7490;
    background: rgba(8,145,178,0.08);
}
[data-theme="light"] .feature-item--danger .feature-content code {
    color: #dc2626;
    background: rgba(220,38,38,0.06);
}
[data-theme="light"] .feature-item--success .feature-content code {
    color: #047857;
    background: rgba(5,150,105,0.06);
}
[data-theme="light"] .feature-content p { color: #475569; }

/* ═══════════════════════════════════════════════════════
   VISUAL EXPLORER FEATURE GRID
   ═══════════════════════════════════════════════════════ */

.visual-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.8rem;
    margin: 1.2rem 0;
}
.visual-card {
    background: var(--bg-card, rgba(16,19,26,0.88));
    border: 1px solid var(--border-color, #1e2230);
    border-radius: 12px;
    padding: 1.1rem;
    text-align: center;
    transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
    position: relative;
    overflow: hidden;
}
.visual-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #f7931a, #8b5cf6, #22d3ee);
    opacity: 0;
    transition: opacity 0.3s;
}
.visual-card:hover {
    border-color: var(--accent-primary, #f7931a);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(247,147,26,0.1);
}
.visual-card:hover::before {
    opacity: 1;
}
.visual-card-icon {
    font-size: 1.6rem;
    display: block;
    margin-bottom: 0.5rem;
}
.visual-card h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary, #f0f2ff);
    margin: 0 0 0.3rem;
}
.visual-card p {
    font-size: 0.8rem;
    color: var(--text-tertiary, #7a8099);
    line-height: 1.45;
    margin: 0;
}

[data-theme="light"] .visual-card {
    background: #fff;
    border-color: #e2e8f0;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
[data-theme="light"] .visual-card:hover {
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}
[data-theme="light"] .visual-card h4 { color: #1e293b; }
[data-theme="light"] .visual-card p { color: #64748b; }

@media (max-width: 768px) {
    .visual-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
    .visual-grid { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════════════════
   AI CONTEXT CHIPS
   ═══════════════════════════════════════════════════════ */

.ctx-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0 1.2rem;
}
.ctx-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.45rem 0.9rem;
    background: var(--bg-card, rgba(16,19,26,0.88));
    border: 1px solid var(--border-color, #1e2230);
    border-radius: 100px;
    font-size: 0.82rem;
    color: var(--text-secondary, #c4c9e2);
    font-weight: 500;
    transition: border-color 0.2s, background 0.2s, transform 0.15s;
    white-space: nowrap;
}
.ctx-chip:hover {
    border-color: var(--accent-eth, #8b5cf6);
    background: rgba(139,92,246,0.08);
    transform: translateY(-1px);
}

[data-theme="light"] .ctx-chip {
    background: #fff;
    border-color: #e2e8f0;
    color: #475569;
}
[data-theme="light"] .ctx-chip:hover {
    background: rgba(124,58,237,0.05);
    border-color: #8b5cf6;
}

/* ═══════════════════════════════════════════════════════
   PREMIUM POLISH
   ═══════════════════════════════════════════════════════ */

/* ── Smooth section transitions ────────────────────────── */
section {
    animation: fadeInUp 0.4s ease-out;
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Step card number glow on hover ────────────────────── */
.step-card:hover .step-num {
    box-shadow: 0 0 12px rgba(247,147,26,0.25);
    transition: box-shadow 0.3s;
}

/* ── Architecture diagram scrollbar ────────────────────── */
.architecture-diagram::-webkit-scrollbar {
    height: 6px;
}
.architecture-diagram::-webkit-scrollbar-track {
    background: transparent;
}
.architecture-diagram::-webkit-scrollbar-thumb {
    background: rgba(247,147,26,0.3);
    border-radius: 3px;
}
.architecture-diagram::-webkit-scrollbar-thumb:hover {
    background: rgba(247,147,26,0.5);
}

/* ── Code blocks inside lesson cards ───────────────────── */
.lesson-card code {
    background: rgba(247,147,26,0.08);
    padding: 0.1em 0.35em;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85em;
}
[data-theme="light"] .lesson-card code {
    background: rgba(217,119,6,0.06);
}

/* ── Bonus tag shimmer ─────────────────────────────────── */
.bonus-tag {
    position: relative;
    overflow: hidden;
}
.bonus-tag::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 3s ease-in-out infinite;
}
@keyframes shimmer {
    0%, 100% { left: -100%; }
    50% { left: 100%; }
}

/* ── Step number pulse for step 1 (start here) ─────────── */
.step-num--1 {
    animation: pulse 2s ease-in-out 3;
}
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(247,147,26,0.3); }
    50% { box-shadow: 0 0 0 8px rgba(247,147,26,0); }
}

/* ── Responsive architecture diagrams ──────────────────── */
@media (max-width: 768px) {
    .architecture-diagram {
        font-size: 0.65rem;
        padding: 1rem;
    }
}