/* ── SageFlow Design System — Doc-page layout ──────────────────
   Layout and documentation-specific styles for sageflow/index.html
   All values use SageFlow design tokens (--sf-*)
   ─────────────────────────────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; }

.ds-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    min-height: 100vh;
}

/* Sidebar */
.ds-sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    padding: 32px 16px 32px 20px;
    border-right: 1px solid var(--sf-border);
    background: var(--sf-bg-2);
    display: flex;
    flex-direction: column;
    gap: 0;
    scrollbar-width: none;
}

.ds-sidebar::-webkit-scrollbar { display: none; }

.ds-sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 10px;
    margin-bottom: 3px;
}

.ds-sidebar-logo {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    object-fit: contain;
}

.ds-sidebar-title {
    font-family: var(--sf-font-display);
    font-size: 18px;
    font-weight: 700;
    color: var(--sf-text);
    margin: 0;
    letter-spacing: -0.3px;
    padding: 0;
}

.ds-sidebar-sub {
    font-family: var(--sf-font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--sf-primary);
    margin: 0 0 24px;
    padding: 0 10px;
}

.ds-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.ds-nav-group {
    margin-bottom: 6px;
}

.ds-nav-group-label {
    font-family: var(--sf-font-mono);
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--sf-text-2);
    margin: 16px 0 4px;
    padding: 0 10px;
    opacity: 0.6;
}

.ds-nav-group:first-child .ds-nav-group-label {
    margin-top: 0;
}

.ds-nav-link {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 6px 10px;
    border-radius: 7px;
    font-family: var(--sf-font-body);
    font-size: 13px;
    color: var(--sf-text-2);
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
    position: relative;
}

.ds-nav-link:hover {
    background: rgba(122, 158, 138, 0.08);
    color: var(--sf-text);
}

/* Active state — set by scroll-spy */
.ds-nav-link.is-active {
    background: rgba(122, 158, 138, 0.12);
    color: var(--sf-primary);
    font-weight: 600;
}

.ds-nav-link.is-active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 6px;
    bottom: 6px;
    width: 2px;
    border-radius: 2px;
    background: var(--sf-primary);
}

/* Download links */
.ds-nav-download {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--sf-border);
}

.ds-nav-download .ds-nav-group-label {
    margin-top: 0;
}

.ds-nav-link--download {
    color: var(--sf-primary);
    font-weight: 600;
}

.ds-nav-link--download:hover {
    background: rgba(122, 158, 138, 0.1);
    color: var(--sf-primary);
}

/* Main content */
.ds-content {
    padding: 60px 72px;
    max-width: 1000px;
    min-width: 0; /* prevent grid blowout from pre/code overflow */
    overflow-x: hidden;
}

/* Section headings */
.ds-section {
    margin-bottom: 80px;
    scroll-margin-top: 40px;
}

.ds-section-title {
    font-family: var(--sf-font-display);
    font-size: 28px;
    font-weight: 700;
    color: var(--sf-text);
    letter-spacing: -0.5px;
    margin: 0 0 6px;
}

.ds-section-desc {
    font-family: var(--sf-font-body);
    font-size: 15px;
    color: var(--sf-text-2);
    margin: 0 0 36px;
    line-height: 1.6;
}

.ds-divider {
    border: none;
    border-top: 1px solid var(--sf-border);
    margin-bottom: 36px;
}

/* Component example blocks */
.ds-example {
    background: var(--sf-bg-2);
    border: 1px solid var(--sf-border);
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 12px;
}

.ds-example--dark {
    background: #0e1a14;
    border-color: rgba(122, 158, 138, 0.15);
}

.ds-example--sage {
    background: #E4F0EA;
    border-color: rgba(122, 158, 138, 0.2);
}

.ds-example--tight {
    padding: 24px;
}

/* Token swatches */
.ds-swatch-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
}

.ds-swatch {
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--sf-border);
}

.ds-swatch-color {
    height: 60px;
}

.ds-swatch-info {
    background: var(--sf-surface);
    padding: 10px 12px;
}

.ds-swatch-name {
    font-family: var(--sf-font-mono);
    font-size: 10px;
    color: var(--sf-text);
    font-weight: 600;
    display: block;
    margin-bottom: 2px;
}

.ds-swatch-value {
    font-family: var(--sf-font-mono);
    font-size: 10px;
    color: var(--sf-text-2);
}

/* Font specimens */
.ds-type-row {
    display: flex;
    align-items: baseline;
    gap: 20px;
    padding: 16px 0;
    border-bottom: 1px solid var(--sf-border);
}

.ds-type-row:last-child { border-bottom: none; }

.ds-type-meta {
    min-width: 160px;
    flex-shrink: 0;
}

.ds-type-class {
    font-family: var(--sf-font-mono);
    font-size: 11px;
    color: var(--sf-primary);
    display: block;
}

.ds-type-spec {
    font-family: var(--sf-font-mono);
    font-size: 10px;
    color: var(--sf-text-2);
    display: block;
    margin-top: 2px;
}

/* Badge demos */
.ds-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

/* Component grid for cards */
.ds-card-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.ds-card-grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

/* Two-col demo layout */
.ds-two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* Spacer */
.ds-spacer { height: 16px; }

/* Page header */
.ds-page-header {
    border-bottom: 1px solid var(--sf-border);
    padding-bottom: 40px;
    margin-bottom: 60px;
}

.ds-page-title {
    font-family: var(--sf-font-display);
    font-size: clamp(32px, 4vw, 52px);
    font-weight: 700;
    color: var(--sf-text);
    letter-spacing: -0.03em;
    margin: 0 0 12px;
}

.ds-page-desc {
    font-family: var(--sf-font-body);
    font-size: 16px;
    color: var(--sf-text-2);
    line-height: 1.65;
    max-width: 560px;
    margin: 0 0 20px;
}

.ds-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(122, 158, 138, 0.12);
    color: var(--sf-primary);
    font-family: var(--sf-font-mono);
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    padding: 5px 12px;
    border-radius: 100px;
}

/* Interaction demo helpers */
.ds-hover-note {
    font-family: var(--sf-font-mono);
    font-size: 10px;
    color: var(--sf-text-2);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 12px;
    opacity: 0.7;
}

/* Stack label above code blocks */
.sf-code-label {
    font-family: var(--sf-font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--sf-text-2);
    margin-bottom: 8px;
}

/* ── Sidebar header (wraps title + close btn on mobile) ── */
.ds-sidebar-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 0;
}

.ds-sidebar-header > div {
    display: flex;
    flex-direction: column;
}

/* Close button — hidden on desktop */
.ds-menu-close {
    display: none;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: none;
    border: 1px solid var(--sf-border);
    border-radius: 8px;
    cursor: pointer;
    color: var(--sf-text-2);
    flex-shrink: 0;
    margin-top: 4px;
}

.ds-menu-close:hover { color: var(--sf-text); background: rgba(122,158,138,0.08); }
.ds-menu-close svg, .ds-menu-close i { width: 15px; height: 15px; }

/* Mobile top bar + toggle — hidden on desktop */
.ds-mobile-bar,
.ds-menu-toggle {
    display: none;
}

/* Backdrop — hidden by default */
.ds-sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 99;
    opacity: 0;
    transition: opacity 0.25s ease;
}

.ds-sidebar-backdrop.is-visible {
    opacity: 1;
}

/* ── Responsive ──────────────────────────────────────────────── */

/* Tablet — sidebar becomes a drawer */
@media (max-width: 900px) {
    .ds-layout {
        grid-template-columns: 1fr;
    }

    /* Sidebar: fixed off-screen drawer */
    .ds-sidebar {
        display: flex;
        position: fixed;
        left: -280px;
        top: 0;
        width: 260px;
        height: 100vh;
        z-index: 100;
        transition: left 0.28s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: none;
    }

    .ds-sidebar.is-open {
        left: 0;
        box-shadow: 4px 0 32px rgba(0, 0, 0, 0.15);
    }

    .ds-sidebar-backdrop {
        display: block;
        pointer-events: none;
    }

    .ds-sidebar-backdrop.is-visible {
        pointer-events: auto;
    }

    .ds-menu-close {
        display: flex;
    }

    /* Mobile top bar */
    .ds-mobile-bar {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 14px 20px;
        border-bottom: 1px solid var(--sf-border);
        background: var(--sf-bg);
        position: sticky;
        top: 0;
        z-index: 98;
    }

    .ds-mobile-bar-title {
        font-family: var(--sf-font-display);
        font-size: 17px;
        font-weight: 700;
        color: var(--sf-text);
        letter-spacing: -0.3px;
    }

    .ds-menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        background: none;
        border: 1px solid var(--sf-border);
        border-radius: 8px;
        cursor: pointer;
        color: var(--sf-text);
    }

    .ds-menu-toggle:hover { background: rgba(122,158,138,0.08); }
    .ds-menu-toggle svg, .ds-menu-toggle i { width: 18px; height: 18px; }

    .ds-content {
        padding: 40px 32px;
        max-width: 100%;
    }

    .ds-section {
        margin-bottom: 56px;
    }

    .ds-example {
        padding: 28px;
    }

    .ds-card-grid {
        grid-template-columns: 1fr;
    }

    .ds-card-grid--3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .ds-two-col {
        grid-template-columns: 1fr;
    }

    .ds-type-row {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }

    .ds-type-meta {
        min-width: 0;
    }
}

/* Mobile */
@media (max-width: 600px) {
    .ds-content {
        padding: 32px 20px;
    }

    .ds-section {
        margin-bottom: 48px;
    }

    .ds-section-title {
        font-size: 22px;
    }

    .ds-example {
        padding: 20px 16px;
        border-radius: 12px;
    }

    .ds-example--tight {
        padding: 16px;
    }

    .ds-card-grid,
    .ds-card-grid--3,
    .ds-two-col {
        grid-template-columns: 1fr;
    }

    .ds-page-header {
        padding-bottom: 28px;
        margin-bottom: 40px;
    }

    .ds-swatch-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }

    /* Code blocks scroll internally, never expand the page */
    .sf-pre {
        border-radius: 8px;
        padding: 16px;
        max-width: 100%;
    }

    .sf-pre code {
        font-size: 11.5px;
    }
}