@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ─── Design Tokens ─────────────────────────────────────── */
:root {
    --bg:           #0d1117;
    --sidebar-bg:   #111820;
    --surface:      #161b22;
    --surface-2:    #1f2428;
    --text:         #c9d1d9;
    --text-muted:   #8b949e;
    --heading:      #f0f6fc;
    --red:          #ff3e3e;
    --red-dim:      rgba(255, 62, 62, 0.12);
    --blue:         #58a6ff;
    --blue-dim:     rgba(88, 166, 255, 0.08);
    --green:        #3fb950;
    --green-dim:    rgba(63, 185, 80, 0.08);
    --yellow:       #d29922;
    --yellow-dim:   rgba(210, 153, 34, 0.08);
    --border:       #21262d;
    --border-hover: #30363d;
    --code-bg:      #0d1117;
    --radius:       8px;
    --radius-lg:    12px;
    --fw-normal:    400;
    --fw-medium:    500;
    --fw-semibold:  600;
    --fw-bold:      700;
    --fw-black:     800;
}

/* ─── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

/* ─── Body ───────────────────────────────────────────────── */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    display: flex;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ─── Sidebar ────────────────────────────────────────────── */
.sidebar {
    width: 272px;
    height: 100vh;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    position: fixed;
    top: 0; left: 0;
    overflow-y: auto; /* Or scroll, but let's use auto with visible thumb */
    padding: 1.75rem 1.25rem 4rem;
    z-index: 100;
    scrollbar-width: thin;
    scrollbar-color: var(--border-hover) transparent;
}

.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 6px; }
.sidebar::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

.logo-wrap {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.logo-wrap img { width: 38px; height: 38px; border-radius: 10px; }

.logo-wrap .brand {
    display: flex;
    flex-direction: column;
}

.logo-wrap .brand-name {
    font-size: 1.3rem;
    font-weight: var(--fw-black);
    color: var(--heading);
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.logo-wrap .brand-ver {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

.nav-group { margin-bottom: 1.75rem; }

.nav-label {
    font-size: 0.68rem;
    font-weight: var(--fw-bold);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--text-muted);
    padding: 0 0.5rem;
    margin-bottom: 0.5rem;
    display: block;
}

.nav-links { list-style: none; }

.nav-links li { margin-bottom: 2px; }

.nav-links a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: var(--fw-medium);
    padding: 0.4rem 0.6rem;
    border-radius: 6px;
    transition: color 0.15s, background 0.15s;
    line-height: 1.4;
}

.nav-links a:hover {
    background: var(--surface);
    color: var(--text);
}

.nav-links a.active {
    background: var(--red-dim);
    color: var(--red);
    font-weight: var(--fw-semibold);
}

/* ─── Main Content ────────────────────────────────────────── */
.main-content {
    margin-left: 272px;
    flex: 1;
    padding: 3.5rem 5rem 8rem;
    max-width: 980px;
    width: 100%;
}

/* ─── Hero ────────────────────────────────────────────────── */
.hero {
    text-align: center;
    padding: 4rem 0 5rem;
    margin-bottom: 5rem;
    border-bottom: 1px solid var(--border);
}

.hero-eyebrow {
    font-size: 0.8rem;
    font-weight: var(--fw-bold);
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--red);
    margin-bottom: 1.25rem;
}

.hero h1 {
    font-size: 3.75rem;
    font-weight: var(--fw-black);
    line-height: 1.1;
    letter-spacing: -2px;
    margin-bottom: 1.25rem;
    background: linear-gradient(135deg, #f0f6fc 20%, #ff3e3e 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-sub {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 560px;
    margin: 0 auto 2.5rem;
    line-height: 1.6;
}

.hero-badges {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.75rem;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: var(--fw-semibold);
    font-family: 'JetBrains Mono', monospace;
    border: 1px solid;
}

.badge-php    { color: #a78bfa; border-color: rgba(167,139,250,.3); background: rgba(167,139,250,.08); }
.badge-green  { color: var(--green); border-color: rgba(63,185,80,.3); background: var(--green-dim); }
.badge-red    { color: var(--red); border-color: rgba(255,62,62,.3); background: var(--red-dim); }
.badge-blue   { color: var(--blue); border-color: rgba(88,166,255,.3); background: var(--blue-dim); }

/* ─── Sections ───────────────────────────────────────────── */
section {
    margin-bottom: 5rem;
    scroll-margin-top: 5rem;
}

h2 {
    font-size: 1.9rem;
    font-weight: var(--fw-bold);
    color: var(--heading);
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
    letter-spacing: -0.5px;
}

h3 {
    font-size: 1.2rem;
    font-weight: var(--fw-semibold);
    color: var(--heading);
    margin: 2.25rem 0 0.875rem;
}

h4 {
    font-size: 1rem;
    font-weight: var(--fw-semibold);
    color: var(--blue);
    margin: 1.5rem 0 0.5rem;
    font-family: 'JetBrains Mono', monospace;
}

p { margin-bottom: 1.1rem; font-size: 1rem; }

ul, ol { padding-left: 1.5rem; margin-bottom: 1.25rem; }
li { margin-bottom: 0.4rem; font-size: 1rem; }

strong { color: var(--heading); font-weight: var(--fw-semibold); }

/* ─── Code ───────────────────────────────────────────────── */
pre {
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem 1.5rem 1.25rem 1.5rem;
    overflow-x: auto;
    margin-bottom: 1.5rem;
    position: relative;
}

pre code {
    font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
    font-size: 0.875rem;
    line-height: 1.65;
    color: #c9d1d9;
}

.code-label {
    font-size: 0.68rem;
    font-weight: var(--fw-bold);
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

code {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.875em;
    color: #ff7b72;
    background: rgba(255,123,114,.08);
    padding: 0.15em 0.4em;
    border-radius: 4px;
}

pre code { background: transparent; padding: 0; color: inherit; font-size: inherit; }

/* ─── Tables ─────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; margin-bottom: 2rem; border-radius: var(--radius); border: 1px solid var(--border); }

table { width: 100%; border-collapse: collapse; }

thead { background: var(--surface); }

th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-size: 0.75rem;
    font-weight: var(--fw-bold);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
}

td {
    padding: 0.875rem 1rem;
    font-size: 0.95rem;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
    line-height: 1.55;
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--surface); }

/* ─── Alerts ─────────────────────────────────────────────── */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    border-left: 3px solid transparent;
    font-size: 0.95rem;
}

.alert-info    { background: var(--blue-dim);   border-color: var(--blue); }
.alert-warning { background: var(--yellow-dim); border-color: var(--yellow); }
.alert-success { background: var(--green-dim);  border-color: var(--green); }
.alert-danger  { background: var(--red-dim);    border-color: var(--red); }

/* ─── Card Grid ──────────────────────────────────────────── */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.card:hover {
    border-color: var(--border-hover);
    box-shadow: 0 4px 20px rgba(0,0,0,.3);
}

.card-icon { font-size: 1.75rem; margin-bottom: 0.75rem; }
.card-title { font-weight: var(--fw-semibold); color: var(--heading); margin-bottom: 0.35rem; font-size: 0.95rem; }
.card-desc { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }

/* ─── Step list ──────────────────────────────────────────── */
.steps { counter-reset: step; list-style: none; padding: 0; margin-bottom: 1.5rem; }
.steps li {
    counter-increment: step;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
    font-size: 1rem;
}
.steps li::before {
    content: counter(step);
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    background: var(--red-dim);
    color: var(--red);
    border: 1px solid rgba(255,62,62,.3);
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: var(--fw-bold);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 0.15rem;
}

/* ─── Callout (inline tip) ───────────────────────────────── */
.callout {
    display: flex;
    gap: 0.875rem;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    font-size: 0.925rem;
}

.callout-icon { flex-shrink: 0; font-size: 1.1rem; }

/* ─── Pipeline diagram ───────────────────────────────────── */
.pipeline {
    display: flex;
    align-items: center;
    gap: 0;
    overflow-x: auto;
    margin: 1.5rem 0 2rem;
    padding: 0.5rem 0;
}
.pipe-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    min-width: 100px;
    text-align: center;
    flex-shrink: 0;
}
.pipe-step .ps-icon { font-size: 1.25rem; margin-bottom: 0.35rem; }
.pipe-step .ps-label { font-size: 0.72rem; font-weight: var(--fw-semibold); color: var(--text-muted); }
.pipe-arrow { color: var(--border-hover); font-size: 1.25rem; padding: 0 0.25rem; flex-shrink: 0; }

/* ─── Tag pills ──────────────────────────────────────────── */
.tag { display: inline-block; padding: 0.2em 0.55em; border-radius: 4px; font-size: 0.75rem; font-weight: var(--fw-semibold); margin-right: 0.25rem; font-family: 'JetBrains Mono', monospace; }
.tag-pg      { background: rgba(0,107,172,.2); color: #5db8f5; }
.tag-mysql   { background: rgba(239,108,0,.15); color: #f59e58; }
.tag-sqlite  { background: rgba(63,185,80,.15); color: #6ee7a0; }
.tag-all     { background: var(--surface-2); color: var(--text-muted); }
.tag-new     { background: var(--green-dim); color: var(--green); }
.tag-info    { background: var(--blue-dim); color: var(--blue); }

/* ─── Responsive ─────────────────────────────────────────── */
/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 1100px) {
    .main-content { padding: 2.5rem 2.5rem 6rem; }
}

@media (max-width: 768px) {
    body { display: block; overflow-x: hidden; }
    .sidebar { 
        width: 100%; 
        height: auto; 
        max-height: 45vh; 
        position: relative; 
        padding: 1.25rem 1rem 1rem; 
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    .main-content { margin-left: 0; padding: 1.5rem 1rem 4rem; width: 100%; }
    
    .hero { padding: 2.5rem 0 3.5rem; margin-bottom: 3.5rem; }
    .hero h1 { font-size: 2.15rem; letter-spacing: -1px; }
    .hero-sub { font-size: 1.05rem; padding: 0 0.5rem; }
    .hero-badges { gap: 0.5rem; }
    
    /* Vertical pipeline on mobile */
    .pipeline { flex-direction: column; align-items: stretch; margin: 1.5rem 0; gap: 0.25rem; }
    .pipe-step { min-width: auto; padding: 0.85rem; border-radius: var(--radius-lg); }
    .pipe-arrow { transform: rotate(90deg); text-align: center; margin: 0.25rem 0; }
    
    h2 { font-size: 1.6rem; scroll-margin-top: 1rem; }
    h3 { font-size: 1.2rem; }
    section { margin-bottom: 4rem; scroll-margin-top: 1rem; }
    .card-grid { grid-template-columns: 1fr; gap: 1rem; }
    
    /* Full-bleed code blocks on mobile */
    pre { margin-left: -1rem; margin-right: -1rem; border-radius: 0; border-left: none; border-right: none; padding: 2.5rem 1rem 1.25rem 1rem; }
    /* Align copy button with new bounds */
    pre button { right: 1rem !important; }
    
    /* Full-bleed tables on mobile */
    .table-wrap { width: 100vw; margin-left: -1rem; border-radius: 0; border-left: none; border-right: none; }
    th { padding: 0.75rem 0.85rem; font-size: 0.7rem; }
    td { padding: 0.85rem; font-size: 0.85rem; }
    
    .alert { font-size: 0.9rem; padding: 0.85rem 1rem; }
    .callout { font-size: 0.9rem; flex-direction: column; gap: 0.5rem; padding: 1rem; }
}