/* HyperSpeed Products — Dark theme matching whitepaper site */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bg-dark: #0a0a0f;
    --bg-surface: #101018;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a26;
    --accent: #00ff88;
    --accent-dim: #00cc6a;
    --accent-bg: rgba(0,255,136,0.08);
    --text: #e8e8ed;
    --text-dim: #8888a0;
    --text-muted: #555570;
    --border: #2a2a3a;
    --border-accent: rgba(0,255,136,0.3);
    --sidebar-w: 260px;
    --topbar-h: 56px;
    --font: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;
}

html { font-size: 16px; }
body {
    font-family: var(--font);
    background: var(--bg-dark);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

/* --- App Layout --- */
.app {
    display: flex;
    min-height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
    width: var(--sidebar-w);
    background: var(--bg-surface);
    border-right: 1px solid var(--border);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    z-index: 100;
    transition: transform 0.2s ease;
}
[data-state-nav="closed"] .sidebar { transform: translateX(-100%); }
[data-state-nav="closed"] .main { margin-left: 0; }

.sidebar__header {
    padding: 1.5rem 1.25rem 1rem;
    border-bottom: 1px solid var(--border);
}
.sidebar__logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--accent) 0%, #00ccff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.sidebar__tagline {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: 0.25rem;
}

.sidebar__nav { padding: 0.75rem 0; }

.sidebar__home {
    display: block;
    padding: 0.5rem 1.25rem;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    border-bottom: 1px solid var(--border);
    margin-bottom: 0.5rem;
}
.sidebar__home:hover { background: var(--accent-bg); }

.sidebar__group { margin-bottom: 0.25rem; }
.sidebar__group-label {
    padding: 0.75rem 1.25rem 0.35rem;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.sidebar__item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1.25rem;
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.15s;
}
.sidebar__item:hover {
    color: var(--text);
    background: var(--accent-bg);
}
.sidebar__icon { font-size: 1rem; width: 1.25rem; text-align: center; }

/* Active nav item — set via htmx:afterSwap or URL match */
.sidebar__item[aria-current="page"] {
    color: var(--accent);
    background: var(--accent-bg);
    border-right: 2px solid var(--accent);
}

/* --- Main --- */
.main {
    flex: 1;
    margin-left: var(--sidebar-w);
    min-height: 100vh;
    transition: margin-left 0.2s ease;
}

/* --- Topbar --- */
.topbar {
    height: var(--topbar-h);
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar__toggle {
    display: none;
    width: 32px;
    height: 32px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    position: relative;
}
.topbar__hamburger,
.topbar__hamburger::before,
.topbar__hamburger::after {
    display: block;
    width: 16px;
    height: 2px;
    background: var(--text-dim);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}
.topbar__hamburger { top: 50%; margin-top: -1px; }
.topbar__hamburger::before { content: ''; top: -5px; }
.topbar__hamburger::after { content: ''; top: 5px; }

/* --- Tier Selector --- */
.tier-selector {
    display: flex;
    gap: 0.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.2rem;
}

.tier-btn {
    padding: 0.35rem 0.85rem;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-dim);
    font-family: var(--font);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}
.tier-btn:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.tier-btn--active {
    background: var(--accent) !important;
    color: var(--bg-dark) !important;
    font-weight: 600;
}

/* --- Content Area --- */
.content {
    padding: 2rem;
    max-width: 960px;
    margin: 0 auto;
}

/* --- Index Page --- */
.index__hero {
    text-align: center;
    padding: 3rem 0 2rem;
}
.index__title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--accent) 0%, #00ccff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.75rem;
}
.index__subtitle {
    font-size: 1.15rem;
    color: var(--text-dim);
    margin-bottom: 0.5rem;
}
.index__hint {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.index__family { margin-bottom: 2.5rem; }
.index__family-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-dim);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.index__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}

/* --- Product Card --- */
.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.25rem;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    transition: all 0.2s;
    display: block;
}
.product-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(0,255,136,0.08);
}
.product-card__icon { font-size: 1.75rem; margin-bottom: 0.75rem; }
.product-card__name {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
}
.product-card__tagline {
    font-size: 0.8rem;
    color: var(--text-dim);
    line-height: 1.5;
    margin-bottom: 0.5rem;
}
.product-card__badge {
    display: inline-block;
    font-size: 0.65rem;
    padding: 0.15rem 0.5rem;
    background: rgba(0,255,136,0.1);
    color: var(--accent-dim);
    border-radius: 4px;
    font-weight: 500;
}

/* --- Product Page --- */
.product__hero {
    text-align: center;
    padding: 2rem 0 1.5rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 2rem;
}
.product__icon-large { font-size: 3rem; margin-bottom: 1rem; }
.product__title {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}
.product__tagline {
    font-size: 1.1rem;
    color: var(--text-dim);
    max-width: 600px;
    margin: 0 auto 1rem;
}
.product__meta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}
.product__family {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-dim);
}
.product__claims {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    background: rgba(0,255,136,0.1);
    border: 1px solid var(--border-accent);
    border-radius: 20px;
    color: var(--accent-dim);
}

/* --- Tier Content --- */
.product__tiers { margin-bottom: 3rem; }
.product__tier { animation: fadeIn 0.2s ease; }

.tier-label {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    background: var(--accent-bg);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.tier-content {
    font-size: 0.95rem;
    color: var(--text);
    line-height: 1.8;
}
.tier-content p { margin-bottom: 1.25rem; }
.tier-content strong { color: var(--accent); font-weight: 600; }
.tier-content code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: rgba(0,255,136,0.08);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    color: var(--accent);
}
.tier-content ol, .tier-content ul {
    margin: 1rem 0 1.25rem 1.5rem;
    color: var(--text-dim);
}
.tier-content li {
    margin-bottom: 0.5rem;
    line-height: 1.7;
}
.tier-content pre {
    background: #000;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    margin: 1rem 0;
    line-height: 1.5;
}

/* --- Diagram --- */
.product__diagram {
    margin-bottom: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}
.product__diagram h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 1rem;
}
.diagram-art {
    background: #000;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    line-height: 1.4;
    color: var(--accent-dim);
}

/* --- Q&A --- */
.product__qa {
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}
.product__qa h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 1rem;
}

.qa-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 0.75rem;
    overflow: hidden;
}
.qa-item[open] { border-color: var(--border-accent); }

.qa-item__q {
    padding: 1rem 1.25rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.qa-item__q::before {
    content: 'Q';
    display: inline-flex;
    width: 1.5rem;
    height: 1.5rem;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: var(--bg-dark);
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 800;
    flex-shrink: 0;
}
.qa-item__q::-webkit-details-marker { display: none; }

.qa-item__a {
    padding: 0 1.25rem 1rem 3rem;
    font-size: 0.9rem;
    color: var(--text-dim);
    line-height: 1.7;
}
.qa-item__a p { margin-bottom: 0.75rem; }

/* --- htmx-r State Defaults --- */
/* Hide all data-when elements by default; htmx-r shows matching ones */
[data-when] { display: none; }
/* Show the default tier (engineer) before JS loads */
[data-when="tier:engineer"] { display: block; }
/* Sidebar visible by default */
[data-when="nav:open"] { display: block; }

/* --- Animations --- */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    [data-state-nav="open"] .sidebar { transform: translateX(0); }
    .main { margin-left: 0; }
    .topbar__toggle { display: block; }
    .content { padding: 1.25rem; }
    .index__title { font-size: 1.75rem; }
    .product__title { font-size: 1.5rem; }
    .tier-selector { overflow-x: auto; flex-wrap: nowrap; }
    .index__grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}