/* Synapse Venture — shared foundation: tokens, reset, primitives.
   Loaded by every page. Page-specific rules live in site.css / app.css. */

/* ---------- tokens ---------- */
:root {
  color-scheme: light dark;

  --bg:        #f7f8fb;
  --bg-deep:   #eef0f6;
  --surface:   #ffffff;
  --surface-2: #f2f4f9;
  --line:      #e2e5ee;
  --line-soft: #edeff5;

  --ink:       #10121a;
  --ink-2:     #454b5e;
  --ink-3:     #616879;

  --accent:      #4f46e5;
  --accent-ink:  #ffffff;
  --accent-soft: #ecebfd;
  --accent-line: #c9c6f7;
  --cyan:        #0891b2;

  --ok:    #047857;
  --ok-bg: #e7f6f0;
  --warn:  #b45309;
  --warn-bg: #fdf1e0;
  --bad:   #be123c;
  --bad-bg: #fdeaef;

  --radius:    14px;
  --radius-sm: 10px;
  --radius-lg: 22px;

  --shadow-sm: 0 1px 2px rgba(16, 18, 26, .05);
  --shadow:    0 2px 6px rgba(16, 18, 26, .05), 0 12px 28px -12px rgba(16, 18, 26, .18);
  --shadow-lg: 0 4px 12px rgba(16, 18, 26, .06), 0 28px 60px -24px rgba(16, 18, 26, .28);

  --ring: 0 0 0 3px var(--accent-soft), 0 0 0 1px var(--accent);

  --wrap: 1140px;
  --step: clamp(1rem, .6rem + 1.2vw, 1.5rem);

  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Inter,
          "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
          "Liberation Mono", monospace;
}

:root[data-theme="dark"],
html.dark {
  --bg:        #0b0d14;
  --bg-deep:   #07080d;
  --surface:   #12151f;
  --surface-2: #181c28;
  --line:      #252a39;
  --line-soft: #1c2130;

  --ink:       #eef1f8;
  --ink-2:     #a8b0c4;
  --ink-3:     #949cb1;

  --accent:      #8b87ff;
  --accent-ink:  #0b0d14;
  --accent-soft: #1e1f3d;
  --accent-line: #3a3a72;
  --cyan:        #4cd7f0;

  --ok:    #34d399;
  --ok-bg: #10241f;
  --warn:  #fbbf24;
  --warn-bg: #2a2010;
  --bad:   #fb7185;
  --bad-bg: #2c1119;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .5);
  --shadow:    0 2px 6px rgba(0, 0, 0, .4), 0 14px 32px -14px rgba(0, 0, 0, .8);
  --shadow-lg: 0 6px 16px rgba(0, 0, 0, .45), 0 32px 70px -26px rgba(0, 0, 0, .9);

  --ring: 0 0 0 3px var(--accent-soft), 0 0 0 1px var(--accent);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:        #0b0d14;
    --bg-deep:   #07080d;
    --surface:   #12151f;
    --surface-2: #181c28;
    --line:      #252a39;
    --line-soft: #1c2130;

    --ink:       #eef1f8;
    --ink-2:     #a8b0c4;
    --ink-3:     #949cb1;

    --accent:      #8b87ff;
    --accent-ink:  #0b0d14;
    --accent-soft: #1e1f3d;
    --accent-line: #3a3a72;
    --cyan:        #4cd7f0;

    --ok:    #34d399;
    --ok-bg: #10241f;
    --warn:  #fbbf24;
    --warn-bg: #2a2010;
    --bad:   #fb7185;
    --bad-bg: #2c1119;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .5);
    --shadow:    0 2px 6px rgba(0, 0, 0, .4), 0 14px 32px -14px rgba(0, 0, 0, .8);
    --shadow-lg: 0 6px 16px rgba(0, 0, 0, .45), 0 32px 70px -26px rgba(0, 0, 0, .9);
  }
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 { margin: 0; line-height: 1.15; letter-spacing: -.021em; font-weight: 650; }
h1 { font-size: clamp(2.1rem, 1.2rem + 3.4vw, 3.5rem); letter-spacing: -.033em; }
h2 { font-size: clamp(1.5rem, 1.1rem + 1.5vw, 2.15rem); letter-spacing: -.027em; }
h3 { font-size: 1.12rem; }
p  { margin: 0; }

a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 6px;
}

::selection { background: var(--accent); color: var(--accent-ink); }

/* ---------- layout ---------- */
.wrap {
  width: min(100% - 2.5rem, var(--wrap));
  margin-inline: auto;
}
@media (max-width: 560px) { .wrap { width: min(100% - 1.75rem, var(--wrap)); } }

.stack > * + * { margin-top: var(--gap, 1rem); }
.row { display: flex; align-items: center; gap: .6rem; }
.spacer { flex: 1 1 auto; }
.wrapline { flex-wrap: wrap; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: var(--accent-ink);
  padding: .6rem 1rem; border-radius: 0 0 var(--radius-sm) 0;
}
.skip:focus { left: 0; }

/* ---------- type helpers ---------- */
.eyebrow {
  font-size: .75rem; font-weight: 650; letter-spacing: .13em;
  text-transform: uppercase; color: var(--accent);
}
.lede  { font-size: clamp(1.02rem, .96rem + .35vw, 1.2rem); color: var(--ink-2); }
.muted { color: var(--ink-3); }
.small { font-size: .875rem; }
.tiny  { font-size: .78rem; }
.mono  { font-family: var(--mono); font-size: .85em; }
.nowrap { white-space: nowrap; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.gradient-text {
  background: linear-gradient(100deg, var(--accent), var(--cyan));
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}

/* ---------- brand mark ---------- */
.brand { display: inline-flex; align-items: center; gap: .6rem; font-weight: 650; letter-spacing: -.02em; }
.brand .mark {
  width: 30px; height: 30px; flex: none;
  border-radius: 9px;
  background: linear-gradient(140deg, var(--accent), var(--cyan));
  display: grid; place-items: center;
  color: #fff; font-size: .85rem; font-weight: 750; letter-spacing: -.04em;
  box-shadow: var(--shadow-sm);
}
.brand .mark svg { width: 17px; height: 17px; }

/* ---------- buttons ---------- */
.btn {
  --btn-bg: var(--surface);
  --btn-ink: var(--ink);
  --btn-line: var(--line);
  display: inline-flex; align-items: center; justify-content: center; gap: .45rem;
  padding: .58rem 1rem;
  font-size: .9rem; font-weight: 550; line-height: 1.2;
  color: var(--btn-ink);
  background: var(--btn-bg);
  border: 1px solid var(--btn-line);
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  transition: transform .12s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease, color .18s ease;
}
.btn:hover { border-color: var(--ink-3); box-shadow: var(--shadow-sm); }
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: .5; pointer-events: none; }

.btn.primary {
  --btn-bg: var(--accent); --btn-ink: var(--accent-ink); --btn-line: var(--accent);
  font-weight: 600;
}
.btn.primary:hover { box-shadow: 0 6px 18px -6px color-mix(in srgb, var(--accent) 70%, transparent); filter: brightness(1.06); }

.btn.ghost { --btn-bg: transparent; --btn-line: transparent; color: var(--ink-2); }
.btn.ghost:hover { --btn-bg: var(--surface-2); --btn-line: var(--line); color: var(--ink); }

.btn.soft { --btn-bg: var(--accent-soft); --btn-ink: var(--accent); --btn-line: var(--accent-line); }

.btn.danger { --btn-ink: var(--bad); --btn-line: var(--line); }
.btn.danger:hover { --btn-bg: var(--bad-bg); --btn-line: var(--bad); }

.btn.sm { padding: .34rem .7rem; font-size: .8rem; }
.btn.lg { padding: .78rem 1.5rem; font-size: 1rem; }
.btn.block { width: 100%; }

.btn.icon { padding: .5rem; width: 36px; height: 36px; border-radius: 50%; }
.btn.icon svg { width: 17px; height: 17px; }
.btn.icon.sm { width: 30px; height: 30px; padding: .35rem; }
.btn.icon.sm svg { width: 15px; height: 15px; }

/* ---------- form controls ---------- */
.field { display: block; }
.field > .label {
  display: block; margin-bottom: .3rem;
  font-size: .8rem; font-weight: 600; color: var(--ink-2);
}
.field > .hint { display: block; margin-top: .35rem; font-size: .78rem; color: var(--ink-3); }

.input, .select, .textarea {
  width: 100%;
  padding: .6rem .8rem;
  font-size: .93rem;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: border-color .16s ease, box-shadow .16s ease, background .16s ease;
}
.input::placeholder, .textarea::placeholder { color: var(--ink-3); }
.input:focus, .select:focus, .textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--ring);
}
.textarea { resize: vertical; min-height: 96px; line-height: 1.55; }
.select {
  appearance: none;
  padding-right: 2.1rem;
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%237b8299' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .65rem center;
  background-size: 15px;
}

.grid-2 { display: grid; gap: .85rem; grid-template-columns: 1fr 1fr; }
@media (max-width: 560px) { .grid-2 { grid-template-columns: 1fr; } }

/* ---------- surfaces ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.card-pad { padding: clamp(1.1rem, .8rem + 1vw, 1.6rem); }

.tag {
  display: inline-flex; align-items: center; gap: .35rem;
  padding: .16rem .55rem;
  font-size: .74rem; font-weight: 600; letter-spacing: .01em;
  color: var(--ink-2);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 999px;
}
.tag.accent { color: var(--accent); background: var(--accent-soft); border-color: var(--accent-line); }
.tag.ok   { color: var(--ok);   background: var(--ok-bg);   border-color: transparent; }
.tag.warn { color: var(--warn); background: var(--warn-bg); border-color: transparent; }
.tag.bad  { color: var(--bad);  background: var(--bad-bg);  border-color: transparent; }

.divider { height: 1px; background: var(--line); border: 0; margin: 0; }

/* ---------- empty state ---------- */
.empty {
  display: grid; place-items: center; gap: .5rem;
  padding: clamp(2rem, 6vw, 3.5rem) 1.5rem;
  text-align: center;
  color: var(--ink-3);
}
.empty .glyph {
  width: 46px; height: 46px; border-radius: 14px;
  display: grid; place-items: center;
  background: var(--surface-2); border: 1px solid var(--line);
  color: var(--ink-3);
}
.empty .glyph svg { width: 21px; height: 21px; }
.empty h3 { color: var(--ink); }

/* ---------- modal ---------- */
.modal-back {
  position: fixed; inset: 0; z-index: 60;
  display: grid; place-items: center;
  padding: 1.25rem;
  background: color-mix(in srgb, var(--bg-deep) 72%, transparent);
  backdrop-filter: blur(6px);
  animation: fade .16s ease;
}
.modal {
  width: min(100%, 480px);
  max-height: min(88vh, 760px);
  overflow: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  animation: pop .18s cubic-bezier(.2, .9, .3, 1.2);
}
.modal.wide { width: min(100%, 640px); }
.modal-head {
  display: flex; align-items: center; gap: .75rem;
  padding: 1.1rem 1.3rem .35rem;
}
.modal-head h2 { font-size: 1.15rem; }
.modal-body { padding: .9rem 1.3rem 1.1rem; }
.modal-foot {
  display: flex; align-items: center; gap: .55rem;
  padding: .9rem 1.3rem 1.2rem;
}

@keyframes fade { from { opacity: 0; } }
@keyframes pop  { from { opacity: 0; transform: translateY(10px) scale(.985); } }

/* ---------- toast ---------- */
.toast-host {
  position: fixed; z-index: 80;
  left: 50%; bottom: 1.5rem; transform: translateX(-50%);
  display: grid; gap: .5rem; justify-items: center;
  pointer-events: none;
}
.toast {
  display: flex; align-items: center; gap: .5rem;
  padding: .55rem .95rem;
  font-size: .87rem; font-weight: 500;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow);
  animation: rise .2s ease;
}
.toast.ok  { color: var(--ok); }
.toast.bad { color: var(--bad); }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }

/* Icon placeholders hydrated by JS. Kept as a low-specificity attribute rule
   so more specific rules (like the theme toggle below) can still hide them. */
[data-icon] { display: inline-flex; align-items: center; }

/* ---------- theme toggle ---------- */
.theme-toggle .sun { display: none; }
:root[data-theme="dark"] .theme-toggle .sun { display: block; }
:root[data-theme="dark"] .theme-toggle .moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .sun  { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .moon { display: none; }
}
:root[data-theme="light"] .theme-toggle .sun  { display: none; }
:root[data-theme="light"] .theme-toggle .moon { display: block; }

/* ---------- misc ---------- */
[hidden] { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}