:root {
    --pbi-yellow: #F2C811;
    --pbi-yellow-strong: #d6ac0a;
    --bg: #f4f6f9;
    --bg-alt: #e9edf3;
    --surface: #ffffff;
    --text: #1f2937;
    --text-muted: #4b5563;
    --border: #d7dde6;
    --header-dark: #111827;
    --header-dark-2: #1f2937;
    --success: #1f9254;
    --warning-bg: #fff6d6;
    --warning-border: #f2c811;
    --info-bg: #eef6ff;
    --info-border: #4d8ef7;
    --danger-bg: #fff1f2;
    --danger-border: #ef4444;
    --shadow-sm: 0 4px 14px rgba(17, 24, 39, 0.08);
    --shadow-md: 0 12px 24px rgba(17, 24, 39, 0.12);
    --radius: 14px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    font-family: "Aptos", "Segoe UI", "Calibri", sans-serif;
    background: linear-gradient(180deg, #f8fafc 0%, var(--bg) 100%);
    color: var(--text);
    line-height: 1.6;
}

a {
    color: inherit;
}

.site-header {
    background: linear-gradient(135deg, var(--header-dark) 0%, var(--header-dark-2) 65%, #374151 100%);
    color: #ffffff;
    border-bottom: 4px solid var(--pbi-yellow);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    max-width: 1150px;
    margin: 0 auto;
    padding: 1.2rem 1.3rem;
    display: flex;
    gap: 1.1rem;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.brand {
    display: flex;
    gap: 0.8rem;
    align-items: center;
    text-decoration: none;
    color: #ffffff;
}

.logo-placeholder {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px dashed rgba(255, 255, 255, 0.5);
    display: grid;
    place-items: center;
    flex-shrink: 0;
}

.logo-placeholder svg {
    width: 42px;
    height: 42px;
}

.brand h1 {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 750;
    letter-spacing: 0.2px;
}

.brand p {
    margin: 0;
    font-size: 0.88rem;
    color: #d1d5db;
}

.top-nav {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.top-nav a {
    padding: 0.42rem 0.75rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    font-size: 0.84rem;
    text-decoration: none;
    transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.top-nav a:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.6);
    transform: translateY(-1px);
}

.top-nav a.active {
    background: var(--pbi-yellow);
    color: #111827;
    border-color: var(--pbi-yellow);
    font-weight: 700;
}

.page-wrap {
    max-width: 1150px;
    margin: 0 auto;
    padding: 1.4rem 1.2rem 3rem;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 1.35rem;
    margin-bottom: 1.15rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.tight-card {
    margin: 0;
}

.spaced-top {
    margin-top: 0.8rem;
}

.hero-card {
    border-top: 5px solid var(--pbi-yellow);
    background: linear-gradient(180deg, #ffffff 0%, #fcfcf8 100%);
}

.pill {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.22rem 0.75rem;
    border-radius: 999px;
    background: #1f2937;
    color: #f9fafb;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.3px;
}

h2,
h3,
h4 {
    margin-top: 0;
    color: #111827;
}

h2 {
    font-size: 1.45rem;
    margin-bottom: 0.6rem;
}

h3 {
    font-size: 1.15rem;
    margin-bottom: 0.45rem;
}

.section-title {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.section-title::before {
    content: "";
    width: 8px;
    height: 30px;
    border-radius: 8px;
    background: var(--pbi-yellow);
}

.subtle {
    color: var(--text-muted);
}

.note {
    border-left: 5px solid transparent;
    border-radius: 10px;
    padding: 0.8rem 0.9rem;
    margin: 0.9rem 0;
}

.note p {
    margin: 0;
}

.note.warning {
    border-color: var(--warning-border);
    background: var(--warning-bg);
}

.note.info {
    border-color: var(--info-border);
    background: var(--info-bg);
}

.note.danger {
    border-color: var(--danger-border);
    background: var(--danger-bg);
}

.badge-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.8rem;
}

.badge {
    padding: 0.2rem 0.62rem;
    border-radius: 999px;
    font-size: 0.76rem;
    font-weight: 700;
    background: #eef2ff;
    color: #3730a3;
}

.badge.yellow {
    background: #fff7d6;
    color: #7a5f00;
}

.badge.green {
    background: #e9f9ef;
    color: #0f7d42;
}

.btn-row {
    display: flex;
    gap: 0.7rem;
    flex-wrap: wrap;
    margin: 0.9rem 0 0.4rem;
}

.button,
.placeholder-link,
.copy-btn {
    border: 1px solid transparent;
    border-radius: 10px;
    padding: 0.52rem 0.78rem;
    font-size: 0.9rem;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.18s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
}

.button.primary,
.placeholder-link {
    background: var(--pbi-yellow);
    color: #111827;
    font-weight: 700;
    border-color: var(--pbi-yellow);
}

.button.primary:hover,
.placeholder-link:hover {
    background: var(--pbi-yellow-strong);
    border-color: var(--pbi-yellow-strong);
    transform: translateY(-1px);
}

.button.ghost {
    border-color: var(--border);
    color: var(--text);
    background: #ffffff;
}

.button.ghost:hover {
    border-color: var(--pbi-yellow-strong);
    color: #111827;
}

.placeholder-link {
    font-size: 0.83rem;
    text-align: center;
    min-width: 250px;
    white-space: nowrap;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.85rem;
}

ul,
ol {
    margin: 0.45rem 0 0.85rem 1.1rem;
}

li {
    margin-bottom: 0.3rem;
}

.table-wrap {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: inset 0 0 0 1px #ffffff;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 640px;
}

thead th {
    background: #111827;
    color: #f8fafc;
    text-align: left;
    font-size: 0.82rem;
    padding: 0.58rem 0.63rem;
}

tbody td {
    padding: 0.55rem 0.63rem;
    border-bottom: 1px solid #ecf0f4;
    font-size: 0.9rem;
    color: #1f2937;
}

tbody tr:nth-child(even) {
    background: #fafbfc;
}

.tag {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    font-size: 0.73rem;
    font-weight: 700;
    padding: 0.18rem 0.55rem;
}

.tag.clean {
    background: #e7f8ef;
    color: #0f7d42;
}

.tag.dirty {
    background: #fff0f1;
    color: #c0252a;
}

.accordion {
    margin-top: 0.65rem;
}

.accordion-item {
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #ffffff;
    margin-bottom: 0.62rem;
    overflow: hidden;
}

.accordion-trigger {
    width: 100%;
    border: 0;
    background: #ffffff;
    text-align: left;
    padding: 0.74rem 0.9rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.8rem;
    font-size: 0.94rem;
    font-weight: 700;
    cursor: pointer;
}

.accordion-trigger:hover {
    background: #f9fafb;
}

.accordion-trigger::after {
    content: "+";
    font-size: 1.15rem;
    color: #6b7280;
}

.accordion-item.is-open .accordion-trigger {
    border-bottom: 1px solid var(--border);
    background: #fffdf4;
}

.accordion-item.is-open .accordion-trigger::after {
    content: "−";
    color: #1f2937;
}

.accordion-panel {
    padding: 0.7rem 0.9rem 0.82rem;
    background: #ffffff;
}

.tabs {
    margin-top: 0.7rem;
}

.tab-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.tab-button {
    border: 1px solid var(--border);
    background: #ffffff;
    color: var(--text);
    border-radius: 999px;
    padding: 0.38rem 0.72rem;
    font-size: 0.84rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.18s ease;
}

.tab-button:hover {
    border-color: #c2c9d4;
    transform: translateY(-1px);
}

.tab-button.active {
    background: var(--pbi-yellow);
    border-color: var(--pbi-yellow);
    color: #111827;
}

.tab-panel {
    display: none;
    margin-top: 0.72rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.8rem;
    background: #ffffff;
}

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

.code-sample {
    position: relative;
    margin: 0.6rem 0;
}

.code-block {
    margin: 0;
    background: #0f172a;
    color: #e5e7eb;
    border-radius: 12px;
    border: 1px solid #1f2937;
    padding: 0.82rem 0.84rem;
    font-family: "Cascadia Mono", "Consolas", "Courier New", monospace;
    font-size: 0.84rem;
    line-height: 1.45;
    overflow-x: auto;
    white-space: pre;
}

.copy-btn {
    margin-top: 0.45rem;
    background: #1f2937;
    border-color: #374151;
    color: #f9fafb;
    font-size: 0.8rem;
}

.copy-btn:hover {
    background: #111827;
}

.copy-btn.copied {
    background: #1f9254;
    border-color: #1f9254;
}

.complete-control {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    margin-top: 0.55rem;
    padding: 0.4rem 0.58rem;
    border-radius: 10px;
    border: 1px dashed #c7ced9;
    font-size: 0.84rem;
    background: #fafbfc;
}

.complete-control input {
    width: 16px;
    height: 16px;
    accent-color: var(--pbi-yellow);
}

.section-complete {
    border-color: #8bc6a5;
    background: linear-gradient(180deg, #ffffff 0%, #f5fff9 100%);
}

.section-complete .section-title,
.section-complete > .section-title,
.section-complete h2.section-title {
    color: var(--success);
    text-decoration: line-through;
    text-decoration-thickness: 2px;
}

.callout-matrix {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.7rem;
    margin-top: 0.7rem;
}

.callout-matrix .mini-card {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.68rem;
    background: #ffffff;
}

.callout-matrix .mini-card h4 {
    margin: 0 0 0.3rem;
    font-size: 0.95rem;
}

.footer {
    max-width: 1150px;
    margin: 0 auto;
    padding: 0 1.2rem 2.1rem;
    color: #4b5563;
    font-size: 0.86rem;
}

.footer .footer-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #ffffff;
    padding: 0.95rem;
    box-shadow: var(--shadow-sm);
}

.kicker {
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.4px;
    text-transform: uppercase;
    color: #6b7280;
    margin-bottom: 0.35rem;
}

.disclaimer {
    font-weight: 600;
    color: #7a5f00;
}

@media (max-width: 900px) {
    .grid-2,
    .grid-3,
    .callout-matrix {
        grid-template-columns: 1fr;
    }

    .placeholder-link {
        min-width: 100%;
    }

    .header-inner {
        align-items: flex-start;
    }
}

@media (max-width: 620px) {
    .page-wrap {
        padding: 1rem 0.78rem 2rem;
    }

    .card {
        padding: 1rem;
    }

    .brand h1 {
        font-size: 1.15rem;
    }

    .top-nav {
        width: 100%;
    }

    .top-nav a {
        flex: 1 1 40%;
        text-align: center;
    }
}