/* ================================================================
   Theme definitions
   ================================================================ */
:root, [data-theme="dark"] {
    --bg-base:        #000000;
    --bg-raised:      #1c1c1e;
    --bg-card:        #2c2c2e;
    --bg-hover:       #3a3a3c;
    --border:         #3a3a3c;
    --text-primary:   #f5f5f7;
    --text-secondary: #aeaeb2;
    --text-tertiary:  #636366;
    --blue:   #0a84ff;
    --green:  #30d158;
    --orange: #ff9f0a;
    --red:    #ff453a;
    --teal:   #5ac8fa;
}

[data-theme="light"] {
    --bg-base:        #f5f5f7;
    --bg-raised:      #ffffff;
    --bg-card:        #fafafa;
    --bg-hover:       #ebebed;
    --border:         #d2d2d7;
    --text-primary:   #1d1d1f;
    --text-secondary: #6e6e73;
    --text-tertiary:  #86868b;
    --blue:   #0071e3;
    --green:  #1a7f37;
    --orange: #b06000;
    --red:    #c0392b;
    --teal:   #0077b6;
}

/* ================================================================
   Base layout
   ================================================================ */
html, body {
    background: var(--bg-base);
    margin: 0;
    padding: 0;
    width: 100%;
    overflow-x: hidden;
    transition: background-color 0.2s ease;
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

.inner {
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 20px;
    padding-right: 20px;
}

/* ================================================================
   Header
   ================================================================ */
#page-header {
    background: var(--bg-raised);
    border-bottom: 0.5px solid var(--border);
    padding: 1.4rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
}

#header-container {
    display: flex;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

#vi-logo {
    width: 56px;
    height: 56px;
    object-fit: contain;
    flex-shrink: 0;
    margin-right: 1.25rem;
    display: block;
    background: transparent;
}

#centre-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
}
#centre-container h1 {
    font-size: 1.3rem; font-weight: 600;
    color: var(--text-primary); margin: 0 0 5px 0;
    letter-spacing: -0.3px; line-height: 1;
}
#centre-container p { font-size: 0.85rem; color: var(--text-secondary); margin: 0; line-height: 1; }

#theme-toggle {
    background: var(--bg-card);
    border: 0.5px solid var(--border);
    border-radius: 50%;
    width: 38px; height: 38px;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    color: var(--text-secondary);
    margin-left: auto;
}
#theme-toggle:hover { background: var(--bg-hover); color: var(--text-primary); }
#theme-toggle svg { width: 18px; height: 18px; transition: stroke-width 0.2s ease; fill: none; }

[data-theme="light"] #theme-toggle {
    background: #ffffff;
    border-color: #d2d2d7;
}
[data-theme="light"] #theme-toggle:hover { background: #e8e8ed; }
[data-theme="light"] #theme-toggle svg {
    stroke: #000000;
    stroke-width: 2.2px;
}

/* ================================================================
   Intro / stats
   ================================================================ */
.intro-section { padding-top: 2.5rem; text-align: center; }
.intro-text { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.75; max-width: 720px; margin: 0 auto 1.5rem; }
.intro-text strong { color: var(--text-primary); font-weight: 600; }

.badges-container { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-bottom: 1.75rem; }
.badges-container img { height: 22px; border-radius: 5px; }

.stats-container {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 10px; max-width: 520px; margin: 0 auto 2.5rem;
}
.stat-box { background: var(--bg-raised); border: 0.5px solid var(--border); border-radius: 14px; padding: 1.1rem 1rem; text-align: center; }
.stat-value { font-size: 1.9rem; font-weight: 700; color: var(--blue); line-height: 1; letter-spacing: -1px; }
.stat-label { font-size: 0.68rem; color: var(--text-tertiary); margin-top: 5px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.5px; }
@media (max-width: 768px) { .stats-container { grid-template-columns: repeat(2, 1fr); } }

/* ================================================================
   Tabs
   ================================================================ */
.tab-nav { border-bottom: 0.5px solid var(--border); margin-bottom: 1rem; display: flex; gap: 4px; }

button.tab-btn {
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    padding: 0.7rem 1rem;
    font-size: 0.85rem; font-weight: 500;
    cursor: pointer;
    color: var(--text-secondary);
    font-family: inherit;
}
button.tab-btn:hover { color: var(--text-primary); }
button.tab-btn[aria-selected="true"] { color: var(--blue); border-bottom-color: var(--blue); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.tab-content-inner { padding: 0.75rem 0; background: transparent; }

/* ================================================================
   Info / warning boxes, findings list
   ================================================================ */
.info-box { background: rgba(10,132,255,0.08); border: 0.5px solid rgba(10,132,255,0.25); border-left: 3px solid var(--blue); border-radius: 10px; padding: 0.9rem 1.1rem; margin-bottom: 1.25rem; font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; }
.info-box strong { color: var(--text-primary); font-weight: 600; }
.warning-box { background: rgba(255,159,10,0.08); border: 0.5px solid rgba(255,159,10,0.25); border-left: 3px solid var(--orange); border-radius: 10px; padding: 0.9rem 1.1rem; margin-bottom: 1.25rem; font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; }
.warning-box strong { color: var(--text-primary); font-weight: 600; }

.findings-list { list-style: none; padding: 0; margin: 0 0 1.25rem; }
.findings-list li { padding: 5px 0 5px 20px; font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; position: relative; }
.findings-list li::before { content: ""; position: absolute; left: 0; top: 12px; width: 7px; height: 7px; border-radius: 50%; }
.findings-list li.ok::before   { background: var(--green); }
.findings-list li.warn::before { background: var(--orange); }
.findings-list li.bad::before  { background: var(--red); }
.findings-list li strong { color: var(--text-primary); font-weight: 600; }

/* ================================================================
   Tables
   ================================================================ */
.lb-table-wrap { background: var(--bg-raised); border-radius: 12px; border: 0.5px solid var(--border); overflow-x: auto; margin-bottom: 0.75rem; }
.lb-table { width: 100%; border-collapse: collapse; font-size: 0.82rem; min-width: 600px; }
.lb-table thead tr { background: var(--bg-card); border-bottom: 0.5px solid var(--border); }
.lb-table th { padding: 9px 16px; text-align: left; font-size: 0.68rem; font-weight: 600; color: var(--text-tertiary); text-transform: uppercase; letter-spacing: 0.5px; white-space: nowrap; }
.lb-table th.right { text-align: right; }
.lb-table td { padding: 13px 16px; border-bottom: 0.5px solid var(--border); vertical-align: middle; color: var(--text-primary); }
.lb-table th:first-child,
.lb-table td:first-child { min-width: 400px; }
.lb-table td.right { text-align: right; font-variant-numeric: tabular-nums; }
.lb-table tbody tr:last-child td { border-bottom: none; }
.lb-table tbody tr:hover td { background: var(--bg-hover); }

.table-note { font-size: 0.75rem; color: var(--text-secondary); margin-top: 6px; }

/* ================================================================
   Model cell, value colors, pills
   ================================================================ */
.model-name { font-weight: 600; font-size: 0.875rem; color: var(--text-primary); }
.model-sub { font-size: 0.71rem; color: var(--text-secondary); margin-top: 3px; }

.val-best { color: var(--green); font-weight: 600; }
.val-mid  { color: var(--text-primary); }
.val-low  { color: var(--red); }
.val-warn { color: var(--orange); font-weight: 500; }
.pill { display: inline-block; font-size: 0.65rem; font-weight: 600; padding: 2px 7px; border-radius: 20px; text-transform: uppercase; letter-spacing: 0.4px; }
.pill-new    { background: rgba(10,132,255,0.15); color: var(--blue); }
.pill-legacy { background: rgba(99,99,102,0.3); color: var(--text-secondary); }

/* ================================================================
   Footer
   ================================================================ */
#footer {
    background: var(--bg-raised);
    border-top: 0.5px solid var(--border);
    padding: 1.25rem 0;
    margin-top: 3rem;
    width: 100%;
}
#footer-container {
    text-align: center;
    font-size: 0.78rem;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}
#footer-container .footer-title { color: var(--text-primary); font-weight: 600; margin-bottom: 6px; }
#footer-container a { color: var(--blue); text-decoration: none; margin: 0 6px; }
#footer-container a:hover { text-decoration: underline; }

/* ================================================================
   About section
   ================================================================ */
.about-text { color: var(--text-secondary); line-height: 1.7; font-size: 0.9rem; }
.about-text h2 { font-size: 1.05rem; margin-top: 1.5rem; color: var(--text-primary); font-weight: 600; }
.about-text h3 { font-size: 0.9rem; margin-top: 1.2rem; color: var(--text-primary); font-weight: 600; }
.about-text strong { color: var(--text-primary); font-weight: 600; }
.about-text code { font-size: 0.78rem; background: var(--bg-card); color: var(--teal); padding: 2px 6px; border-radius: 4px; }
.about-text .citation {
    overflow-x: auto;
    margin: 0.75rem 0 1.25rem;
    padding: 1rem;
    background: var(--bg-card);
    border: 0.5px solid var(--border);
    border-radius: 10px;
}
.about-text .citation code {
    padding: 0;
    background: transparent;
    color: var(--text-primary);
    white-space: pre;
}
.about-text a { color: var(--blue); }
.about-text hr { border-color: var(--border); }
.about-text ul { padding-left: 1.2rem; }