:root {
    --blue-900: #06283d;
    --blue-800: #0b4f6c;
    --blue-700: #0d6e99;
    --blue-600: #1282a2;
    --blue-500: #2ea3d6;
    --blue-300: #74c0e3;
    --blue-100: #d7f3ff;
    --bg: #f6faff;
    --muted: #6b7280;
    --card-radius: 12px;
    --max-width: 1400px;
    --border: #c1ebff;
    --shadow-1: 0 6px 18px rgba(8, 30, 45, 0.06);
    --shadow-2: 0 4px 10px rgba(8, 30, 45, 0.04);
    --ide-bg: #1e1e2e;
    --ide-toolbar: #2a2a3d;
    --ide-border: #3a3a52;
    --ide-text: #cdd6f4;
    --file-tab-bg: #181825;
    --file-tab-active: #313244;
}

* {
    box-sizing: border-box;
    scrollbar-width: thin;
    scrollbar-color: var(--blue-600) transparent;
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--blue-600), var(--blue-500));
    border-radius: 10px;
    border: 2px solid transparent;
    background-clip: content-box;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--blue-700), var(--blue-600));
}

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

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: Inter, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(180deg, var(--bg), #f3f8ff 60%);
    color: var(--blue-900);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.45;
    padding: 28px 18px;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 18px;
}

.site-header {
    text-align: center;
    margin-bottom: 18px;
}

.site-title {
    font-size: clamp(26px, 4vw, 36px);
    margin: 0;
    color: var(--blue-900);
    letter-spacing: -0.02em;
}

.lead {
    max-width: 980px;
    margin: 12px auto 0;
    color: var(--muted);
    font-size: 15px;
    padding: 8px 12px;
}

.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    align-items: start;
    margin-top: 12px;
}

.cat-heading {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 6px 0 14px;
    color: var(--blue-800);
    font-size: 18px;
    font-weight: 700;
    padding: 8px 14px;
    background: linear-gradient(90deg, rgba(46, 163, 214, 0.07), transparent);
    border-radius: 10px;
}

.cat-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 6px rgba(0, 0, 0, 0.2);
}

.cat-count {
    margin-left: auto;
    font-size: 12px;
    font-weight: 600;
    color: var(--muted);
    background: rgba(46, 163, 214, 0.1);
    border: 1px solid rgba(46, 163, 214, 0.2);
    border-radius: 20px;
    padding: 2px 10px;
}

.flex {
    display: flex;
}

/* ===== Filter Tabs ===== */
.filter-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin: 28px 0 10px;
}

.filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: 30px;
    border: 1.5px solid var(--border);
    background: transparent;
    color: var(--blue-800);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.18s ease;
    font-family: inherit;
}

.filter-btn:hover {
    background: rgba(46, 163, 214, 0.1);
    border-color: var(--blue-500);
    transform: translateY(-1px);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--blue-600), var(--blue-500));
    border-color: transparent;
    color: white;
    box-shadow: 0 4px 14px rgba(18, 130, 162, 0.35);
}

.filter-icon {
    font-size: 15px;
}

.results-meta {
    text-align: center;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 6px;
}

/* ===== Category Badge ===== */
.cat-badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 9px;
    border-radius: 20px;
    letter-spacing: 0.03em;
    white-space: nowrap;
    flex-shrink: 0;
}

.center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.card {
    background: white;
    border-radius: var(--card-radius);
    box-shadow: var(--shadow-1);
    margin: 5px 0;
    overflow: hidden;
    transition:
        transform 0.18s ease,
        box-shadow 0.18s ease;
    border: 1px solid rgba(10, 30, 60, 0.04);
}

.card:focus-within,
.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-2);
}

.card summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    padding: 14px 18px;
    gap: 12px;
    user-select: none;
    outline: none;
}

.summary-left {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.summary-right {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.summary-title {
    font-weight: 600;
    color: var(--blue-900);
    font-size: 16px;
    display: block;
}

.summary-meta {
    padding: 0 10px;
    font-size: 13px;
    color: var(--muted);
    display: block;
}

.chev {
    width: 20px;
    height: 20px;
    color: var(--blue-700);
    transition: transform 0.25s ease;
    flex-shrink: 0;
}

.card details[open] .chev {
    transform: rotate(180deg);
}

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

.card-body {
    padding: 14px 16px 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* ===== Tab Bar ===== */
.tab-bar {
    display: flex;
    gap: 4px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 0;
    margin-bottom: 2px;
}

.tab-btn {
    padding: 6px 16px;
    border: none;
    background: transparent;
    color: var(--muted);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    border-radius: 6px 6px 0 0;
    font-family: inherit;
    transition:
        color 0.15s,
        border-color 0.15s,
        background 0.15s;
}

.tab-btn:hover {
    color: var(--blue-700);
    background: rgba(46, 163, 214, 0.06);
}

.tab-btn.active {
    color: var(--blue-600);
    border-bottom-color: var(--blue-500);
    background: rgba(46, 163, 214, 0.07);
}

/* ===== Panels ===== */
.panel {
    display: none;
}

.panel.active {
    display: block;
}

.preview {
    border-radius: 10px;
    padding: 8px;
    border: 1px solid var(--border);
}

.preview iframe {
    width: 100%;
    height: 260px;
    border-radius: 8px;
    border: none;
    display: block;
    background: white;
}

.card-info {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 4px;
}

/* ===== IDE Code Viewer ===== */
.panel-code {
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--ide-border);
    background: var(--ide-bg);
}

.file-tabs {
    display: flex;
    gap: 0;
    background: var(--file-tab-bg);
    border-bottom: 1px solid var(--ide-border);
    overflow-x: auto;
    scrollbar-width: thin;
}

.file-tab-btn {
    padding: 7px 14px;
    border: none;
    background: transparent;
    color: #6c7086;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    font-family: "Cascadia Code", "Fira Code", "JetBrains Mono", monospace;
    border-right: 1px solid var(--ide-border);
    transition:
        background 0.15s,
        color 0.15s;
    letter-spacing: 0.01em;
}

.file-tab-btn:hover {
    background: rgba(255, 255, 255, 0.06);
    color: #cdd6f4;
}

.file-tab-btn.active {
    background: var(--file-tab-active);
    color: #cdd6f4;
    border-bottom: 2px solid var(--blue-500);
}

.ide-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--ide-toolbar);
    padding: 6px 14px;
    border-bottom: 1px solid var(--ide-border);
    gap: 8px;
}

.ide-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.ide-filename {
    font-size: 12px;
    color: #89b4fa;
    font-family: "Cascadia Code", "Fira Code", "JetBrains Mono", monospace;
    opacity: 0.85;
}

.copy-btn {
    padding: 3px 11px;
    border: 1px solid var(--ide-border);
    background: rgba(255, 255, 255, 0.07);
    color: #a6adc8;
    font-size: 12px;
    border-radius: 5px;
    cursor: pointer;
    font-family: inherit;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    white-space: nowrap;
    transition:
        background 0.15s,
        color 0.15s,
        border-color 0.15s;
}

.copy-btn:hover {
    background: rgba(137, 180, 250, 0.15);
    color: #89b4fa;
    border-color: #89b4fa;
}

.ide-download-btn {
    color: #a6e3a1;
    border-color: rgba(166, 227, 161, 0.3);
}

.ide-download-btn:hover {
    background: rgba(166, 227, 161, 0.12);
    color: #a6e3a1;
    border-color: #a6e3a1;
}

.ide-pre {
    margin: 0 !important;
    border-radius: 0 !important;
    background: var(--ide-bg) !important;
    max-height: 420px;
    overflow-y: auto;
    font-size: 13px !important;
    line-height: 1.6 !important;
    padding: 14px !important;
    font-family:
        "Cascadia Code", "Fira Code", "JetBrains Mono", Consolas, monospace !important;
}

/* Override prism-tomorrow to match our IDE bg */
.ide-pre code[class*="language-"],
.ide-pre[class*="language-"] {
    background: var(--ide-bg) !important;
    text-shadow: none !important;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--muted);
    font-size: 15px;
    grid-column: 1 / -1;
}

.description {
    margin: 0;
    color: var(--muted);
    font-size: 13.5px;
    line-height: 1.55;
}

.actions {
    margin-top: 8px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 8px 12px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    color: white;
    background: linear-gradient(180deg, var(--blue-600), var(--blue-500));
    box-shadow: 0 6px 14px rgba(46, 163, 214, 0.14);
    transition:
        transform 0.12s ease,
        box-shadow 0.12s ease;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 24px rgba(46, 163, 214, 0.12);
}

.btn:active {
    transform: translateY(0);
}

.btn-outline {
    background: transparent;
    color: var(--blue-900);
    border: 1px solid rgba(14, 65, 110, 0.09);
    box-shadow: none;
}

.site-footer {
    margin-top: 28px;
    padding: 18px 0;
    text-align: center;
    color: var(--muted);
    font-size: 14px;
}

/*
summary:focus,
.btn:focus,
a:focus {
  outline: 3px solid rgba(46, 163, 214, 0.18);
  outline-offset: 2px;
  border-radius: 8px;
} */

.card details {
    transition: all 160ms ease;
}

/* .card details[open] {
  border-top: 1px solid rgba(10, 30, 60, 0.02);
} */

/* ===== Header Layout ===== */
.header-row {
    display: flex;
    align-items: center;
    flex-direction: column;
    justify-content: space-between;
    gap: 12px;
}

/* ===== Dark Mode Variables ===== */
body.dark {
    --bg: #0b1220;
    --blue-900: #e6f2ff;
    --blue-800: #cfe8ff;
    --muted: #9ca3af;
    --border: #1f2a44;

    background: linear-gradient(180deg, #0b1220, #0e1628 60%);
}

body.dark .filter-btn {
    color: #cfe8ff;
    border-color: #1f2a44;
}

body.dark .filter-btn:hover {
    background: rgba(46, 163, 214, 0.15);
}

body.dark .cat-heading {
    color: #cfe8ff;
}

body.dark .cat-count {
    background: rgba(46, 163, 214, 0.12);
    border-color: rgba(46, 163, 214, 0.2);
}

body.dark .tab-btn {
    color: #6b7280;
}

body.dark .tab-btn.active {
    color: var(--blue-300);
    border-bottom-color: var(--blue-300);
    background: rgba(116, 192, 227, 0.07);
}

body.dark .tab-btn:hover {
    color: var(--blue-300);
    background: rgba(116, 192, 227, 0.07);
}

body.dark ::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #1f3a5f, #2563eb);
}

/* Cards in dark mode */
body.dark .card {
    background: #0f1b33;
    border-color: rgba(255, 255, 255, 0.06);
}

body.dark .preview {
    border-color: rgba(255, 255, 255, 0.08);
}

body.dark .btn-outline {
    color: #e6f2ff;
    border-color: rgba(255, 255, 255, 0.12);
}

/* ===== Toggle Button ===== */
.theme-toggle {
    background: linear-gradient(180deg, var(--blue-600), var(--blue-500));
    border: none;
    border-radius: 50%;
    width: 42px;
    height: 42px;
    cursor: pointer;
    font-size: 18px;
    color: white;
    display: grid;
    place-items: center;
    box-shadow: 0 8px 20px rgba(46, 163, 214, 0.25);
    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.theme-toggle:hover {
    transform: translateY(-2px) rotate(6deg);
    box-shadow: 0 12px 28px rgba(46, 163, 214, 0.35);
}

body.dark .theme-toggle {
    background: linear-gradient(180deg, #111827, #1f2937);
}

.theme-toggle:focus,
.theme-toggle:focus-visible {
    outline: none;
}

.search-bar {
    margin-top: 32px;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 400px;
    border: 1px solid transparent;
    border-bottom-color: var(--muted);
    transition:
        border-color 0.3s,
        box-shadow 0.3s;
}

svg {
    color: var(--blue-800);
    font-size: 0.8rem;
}

.search-bar:focus-within {
    border-bottom-color: var(--blue-500);
}

#search-input {
    width: 100%;
    max-width: 400px;
    background-color: transparent;
    border: 1px solid transparent;
    box-shadow: none;
    outline: none;
    padding: 8px 7px;
    font-size: 1rem;
    color: var(--blue-800);
    /* border-radius: 8px; */
}

#search-input::placeholder {
    color: var(--blue-800);
}

#search-input:focus {
    outline: none;
}