/* ==========================================================================
   Tom Davison — personal site
   Design system: single stylesheet, no build step.
   ========================================================================== */

:root {
  /* Palette (dark is default) */
  --bg:        #0b0f14;
  --bg-soft:   #11161d;
  --surface:   #151b23;
  --surface-2: #1b232d;
  --border:    #232c38;
  --text:      #e6edf3;
  --text-soft: #aeb9c5;
  --muted:     #7d8a99;
  --accent:    #4fd1c5;   /* teal */
  --accent-2:  #6ea8fe;   /* blue */
  --accent-ink:#06231f;
  --danger:    #f87171;
  --ok:        #4ade80;

  --radius:   14px;
  --radius-sm: 9px;
  --shadow:   0 1px 2px rgba(0,0,0,.4), 0 8px 30px rgba(0,0,0,.35);
  --maxw:     64rem;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

:root[data-theme="light"] {
  --bg:        #f7f9fc;
  --bg-soft:   #eef2f7;
  --surface:   #ffffff;
  --surface-2: #f1f4f9;
  --border:    #e0e6ee;
  --text:      #0f1720;
  --text-soft: #38434f;
  --muted:     #66727f;
  --accent:    #0d9488;
  --accent-2:  #2563eb;
  --accent-ink:#ffffff;
  --shadow:    0 1px 2px rgba(16,24,40,.06), 0 10px 30px rgba(16,24,40,.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Subtle aurora backdrop */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60rem 40rem at 75% -10%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 60%),
    radial-gradient(50rem 36rem at 10% 0%, color-mix(in srgb, var(--accent-2) 12%, transparent), transparent 55%);
  pointer-events: none;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; display: block; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem; }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(140%) blur(10px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; gap: 1rem; height: 60px; }
.brand {
  font-weight: 700; letter-spacing: -.02em; color: var(--text);
  display: inline-flex; align-items: center; gap: .55rem; margin-right: auto;
}
.brand:hover { text-decoration: none; }
.brand .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 22%, transparent);
}
.nav-links { display: flex; gap: .25rem; align-items: center; }
.nav-links a {
  color: var(--text-soft); padding: .45rem .7rem; border-radius: 8px;
  font-size: .94rem; font-weight: 500;
}
.nav-links a:hover { color: var(--text); background: var(--surface-2); text-decoration: none; }
.nav-links a.active { color: var(--text); background: var(--surface-2); }

.icon-btn {
  display: inline-grid; place-items: center;
  width: 38px; height: 38px; border-radius: 9px;
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text-soft); cursor: pointer; transition: .15s ease;
}
.icon-btn:hover { color: var(--text); border-color: color-mix(in srgb, var(--accent) 50%, var(--border)); }
.icon-btn svg { width: 18px; height: 18px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .6rem 1rem; border-radius: 10px; font-weight: 600; font-size: .95rem;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  cursor: pointer; transition: .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); border-color: color-mix(in srgb, var(--accent) 50%, var(--border)); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--accent-ink); border: none; font-weight: 700;
}
.btn-primary:hover { filter: brightness(1.05); }
.btn svg { width: 17px; height: 17px; }

/* ---------- Hero ---------- */
.hero { padding: 4.5rem 0 2.5rem; }
.eyebrow {
  display: inline-flex; align-items: center; gap: .5rem;
  font-size: .8rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase;
  color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  padding: .3rem .7rem; border-radius: 999px;
}
.hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.6rem); line-height: 1.05;
  letter-spacing: -.03em; margin: 1.2rem 0 .6rem;
}
.hero h1 .grad {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lead { font-size: 1.18rem; color: var(--text-soft); max-width: 40rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.6rem; }

/* ---------- Sections ---------- */
section { padding: 2.2rem 0; }
.section-title { font-size: 1.45rem; letter-spacing: -.02em; margin: 0 0 .35rem; }
.section-sub { color: var(--muted); margin: 0 0 1.4rem; }

/* ---------- Cards / grid ---------- */
.grid { display: grid; gap: 1.1rem; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.3rem; box-shadow: var(--shadow);
  transition: .18s ease; position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.card h3 { margin: .2rem 0 .4rem; font-size: 1.1rem; letter-spacing: -.01em; }
.card p { margin: 0; color: var(--text-soft); font-size: .96rem; }
a.card { color: inherit; }
a.card:hover { text-decoration: none; }
.card .card-icon {
  width: 42px; height: 42px; border-radius: 10px; display: grid; place-items: center;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent); margin-bottom: .7rem;
}
.card .card-icon svg { width: 22px; height: 22px; }
.card .arrow { position: absolute; top: 1.3rem; right: 1.3rem; color: var(--muted); transition: .18s; }
a.card:hover .arrow { color: var(--accent); transform: translate(2px,-2px); }

.tags { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .9rem; }
.tag {
  font-size: .78rem; font-weight: 600; color: var(--text-soft);
  background: var(--surface-2); border: 1px solid var(--border);
  padding: .2rem .55rem; border-radius: 999px;
}

/* ---------- CV / timeline ---------- */
.cv-header {
  display: flex; flex-wrap: wrap; gap: 1.5rem; align-items: flex-start;
  justify-content: space-between; padding: 2.5rem 0 1rem;
}
.cv-meta { display: flex; flex-direction: column; gap: .35rem; color: var(--text-soft); font-size: .95rem; }
.cv-meta a { color: var(--text-soft); }
.cv-meta .row { display: inline-flex; align-items: center; gap: .5rem; }
.cv-meta svg { width: 16px; height: 16px; color: var(--accent); flex: none; }

.timeline { position: relative; margin: 1rem 0 0; padding-left: 1.6rem; }
.timeline::before {
  content: ""; position: absolute; left: 5px; top: .4rem; bottom: .4rem;
  width: 2px; background: linear-gradient(var(--accent), transparent);
}
.tl-item { position: relative; padding: 0 0 1.6rem; }
.tl-item::before {
  content: ""; position: absolute; left: -1.6rem; top: .45rem;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--accent);
}
.tl-item .when { font-size: .82rem; color: var(--muted); font-weight: 600; letter-spacing: .02em; }
.tl-item h3 { margin: .15rem 0 .1rem; font-size: 1.08rem; }
.tl-item .org { color: var(--accent); font-weight: 600; font-size: .95rem; }
.tl-item p { margin: .4rem 0 0; color: var(--text-soft); font-size: .95rem; }

.skill-group { margin-bottom: 1.1rem; }
.skill-group h4 { margin: 0 0 .5rem; font-size: .82rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }

/* ---------- Dashboard shell ---------- */
.dash-bar {
  display: flex; align-items: center; gap: .75rem; flex-wrap: wrap;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: .9rem 1.1rem; margin-bottom: 1.4rem;
}
.dash-bar .status { display: inline-flex; align-items: center; gap: .5rem; font-size: .9rem; color: var(--text-soft); }
.pulse { width: 9px; height: 9px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 0 color-mix(in srgb, var(--ok) 60%, transparent); animation: pulse 2s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--ok) 55%, transparent); } 70% { box-shadow: 0 0 0 8px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }

.metric { display: flex; flex-direction: column; gap: .2rem; }
.metric .label { font-size: .8rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.metric .value { font-size: 1.9rem; font-weight: 700; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.metric .delta { font-size: .85rem; font-weight: 600; }
.delta.up { color: var(--ok); } .delta.down { color: var(--danger); }

.placeholder-chart {
  height: 160px; border-radius: var(--radius-sm); margin-top: .8rem;
  background:
    linear-gradient(transparent 0 0) 0 0/100% 100%,
    repeating-linear-gradient(90deg, var(--border) 0 1px, transparent 1px 25%),
    repeating-linear-gradient(0deg, var(--border) 0 1px, transparent 1px 25%);
  position: relative; overflow: hidden; border: 1px solid var(--border);
}
.placeholder-chart::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(120deg, transparent, color-mix(in srgb, var(--accent) 22%, transparent), transparent);
  transform: translateX(-100%); animation: shimmer 2.6s infinite;
}
@keyframes shimmer { 100% { transform: translateX(100%); } }

.note {
  background: color-mix(in srgb, var(--accent-2) 8%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--accent-2) 30%, var(--border));
  border-radius: var(--radius); padding: 1rem 1.2rem; font-size: .92rem; color: var(--text-soft);
}
.note strong { color: var(--text); }
code, .mono { font-family: var(--mono); font-size: .88em; background: var(--surface-2); padding: .12rem .4rem; border-radius: 6px; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border); margin-top: 3rem; padding: 2rem 0;
  color: var(--muted); font-size: .9rem;
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between;
}
.social { display: flex; gap: .4rem; }

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .grid.cols-2, .grid.cols-3 { grid-template-columns: 1fr; }
  .nav-links a { padding: .4rem .5rem; }
  .hero { padding: 3rem 0 1.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto !important; transition: none !important; }
}

/* ---------- Dashboard (private) ---------- */
.badge {
  font-size: .68rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  padding: .2rem .5rem; border-radius: 999px; border: 1px solid var(--border);
}
.badge-paper { color: var(--accent-2); border-color: color-mix(in srgb, var(--accent-2) 45%, var(--border)); background: color-mix(in srgb, var(--accent-2) 10%, transparent); }

.metric .value.pos { color: var(--ok); } .metric .value.neg { color: var(--danger); }

.sub-h { margin: 1.6rem 0 .5rem; font-size: 1.05rem; letter-spacing: -.01em; }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.data-table { width: 100%; border-collapse: collapse; font-size: .9rem; font-variant-numeric: tabular-nums; }
.data-table th, .data-table td { padding: .55rem .7rem; text-align: left; white-space: nowrap; border-bottom: 1px solid var(--border); }
.data-table thead th { font-size: .74rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; }
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table td.num, .data-table th.num { text-align: right; }
.data-table td.pos { color: var(--ok); } .data-table td.neg { color: var(--danger); }
.data-table .race-name { white-space: normal; min-width: 16rem; color: var(--text-soft); }
.muted-cell { color: var(--muted); text-align: center; padding: 1.2rem; }
.row-link { cursor: pointer; transition: background .12s; }
.row-link:hover, .row-link:focus { background: var(--surface-2); outline: none; }

.pill { font-size: .72rem; font-weight: 700; padding: .12rem .5rem; border-radius: 999px; }
.pill-win { color: var(--ok); background: color-mix(in srgb, var(--ok) 16%, transparent); }
.pill-lose { color: var(--danger); background: color-mix(in srgb, var(--danger) 16%, transparent); }
.pill-pending { color: var(--muted); background: var(--surface-2); }

/* Chart */
.chart { width: 100%; }
.chart-svg { width: 100%; height: auto; display: block; }
.chart-area { fill: color-mix(in srgb, var(--accent) 16%, transparent); stroke: none; }
.chart-line { fill: none; stroke: var(--accent); stroke-width: 2; }
.chart-zero { stroke: var(--border); stroke-width: 1; stroke-dasharray: 4 4; }
.chart-axis { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.chart-pt { fill: var(--accent); }
.chart-pt.pos { fill: var(--ok); } .chart-pt.neg { fill: var(--danger); }