/* ================================================================
   MAGNET — Mass-spectrum Annotation via Gated-intensity Networks
   Visual system: a laboratory instrument readout.
   The signature is intensity-gated colour — peaks and confidence
   bars are painted along a teal -> violet -> magenta -> amber ramp,
   mirroring the "gated-intensity" idea the model is named for.
   ================================================================ */

:root {
  /* Surfaces (dark / default) */
  --bg: #0B0E1A;
  --bg-grid: rgba(124, 92, 255, 0.05);
  --surface: #141A2E;
  --surface-2: #1B2238;
  --surface-3: #232C48;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);

  /* Ink */
  --ink: #EAEDF7;
  --ink-muted: #99A2C4;
  --ink-faint: #626C90;

  /* Brand accents */
  --teal: #00E0C6;
  --violet: #7C5CFF;
  --magenta: #FF3D8B;
  --amber: #FFB020;
  --danger: #FF5A6E;

  /* Intensity ramp (also drives confidence bars) */
  --ramp-0: #23C7BD;
  --ramp-1: #7C5CFF;
  --ramp-2: #FF3D8B;
  --ramp-3: #FFB020;

  /* Molecule "paper" — constant in both themes; chemists expect ink-on-white */
  --paper: #FBFCFE;
  --paper-ink: #10152a;

  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 24px 60px -30px rgba(0, 0, 0, 0.7);
  --glow-teal: 0 0 0 1px rgba(0, 224, 198, 0.35), 0 0 32px -8px rgba(0, 224, 198, 0.45);

  --font-display: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "Cascadia Mono", "SFMono-Regular", Consolas, Menlo, monospace;

  --maxw: 1240px;
}

[data-theme="light"] {
  --bg: #F4F6FC;
  --bg-grid: rgba(124, 92, 255, 0.06);
  --surface: #FFFFFF;
  --surface-2: #EEF2FB;
  --surface-3: #E2E9F8;
  --border: rgba(16, 22, 40, 0.10);
  --border-strong: rgba(16, 22, 40, 0.18);
  --ink: #131A2E;
  --ink-muted: #4E5877;
  --ink-faint: #7A83A3;
  --shadow: 0 24px 50px -34px rgba(30, 40, 90, 0.45);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1100px 620px at 82% -8%, rgba(124, 92, 255, 0.18), transparent 60%),
    radial-gradient(900px 520px at 6% 4%, rgba(0, 224, 198, 0.12), transparent 55%),
    linear-gradient(var(--bg-grid) 1px, transparent 1px) 0 0 / 42px 42px,
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px) 0 0 / 42px 42px,
    var(--bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

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

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}
.topbar__inner {
  max-width: var(--maxw); margin: 0 auto; padding: 12px 24px;
  display: flex; align-items: center; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark { width: 30px; height: 30px; display: block; }
.brand__name {
  font-family: var(--font-display); font-weight: 900;
  letter-spacing: 0.22em; font-size: 20px;
}
.brand__name span { color: var(--teal); }
.brand__sub {
  font-size: 11px; color: var(--ink-faint); letter-spacing: 0.14em;
  text-transform: uppercase; margin-top: 1px;
}
.topbar__spacer { flex: 1; }
.navlink {
  font-size: 13px; color: var(--ink-muted); letter-spacing: 0.04em;
  padding: 8px 10px; border-radius: 8px; cursor: pointer; background: none;
  border: none; font-family: var(--font-body);
}
.navlink:hover { color: var(--ink); background: var(--surface-2); text-decoration: none; }
.theme-toggle {
  width: 38px; height: 38px; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface-2);
  color: var(--ink); display: grid; place-items: center;
}
.theme-toggle:hover { border-color: var(--border-strong); }

/* ---------- Hero ---------- */
.hero { padding: 54px 0 24px; }
.hero__eyebrow {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.28em;
  text-transform: uppercase; color: var(--teal); margin-bottom: 18px;
}
.hero__title {
  font-family: var(--font-display); font-weight: 900;
  font-size: clamp(38px, 6vw, 74px); line-height: 0.98; letter-spacing: -0.02em;
  margin: 0 0 18px;
}
.hero__title .grad {
  background: linear-gradient(96deg, var(--teal), var(--violet) 55%, var(--magenta));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__lede {
  font-size: clamp(16px, 2vw, 20px); color: var(--ink-muted);
  max-width: 720px; margin: 0 0 26px;
}
.hero__lede b { color: var(--ink); font-weight: 600; }
.byline {
  display: flex; flex-wrap: wrap; gap: 6px 22px; font-size: 13px;
  color: var(--ink-faint); border-top: 1px solid var(--border);
  padding-top: 18px; margin-top: 6px;
}
.byline .authors { color: var(--ink-muted); }
.byline .authors b { color: var(--ink); font-weight: 600; }

/* ---------- Workbench ---------- */
.workbench {
  display: grid; grid-template-columns: minmax(360px, 460px) 1fr;
  gap: 22px; margin: 22px 0 12px; align-items: start;
}
@media (max-width: 940px) { .workbench { grid-template-columns: 1fr; } }

.panel {
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.panel__head {
  display: flex; align-items: center; gap: 10px;
  padding: 16px 20px; border-bottom: 1px solid var(--border);
}
.panel__head h2 {
  font-family: var(--font-display); font-weight: 700; font-size: 15px;
  letter-spacing: 0.02em; margin: 0;
}
.panel__tag {
  margin-left: auto; font-family: var(--font-mono); font-size: 11px;
  color: var(--ink-faint); letter-spacing: 0.08em;
}
.panel__body { padding: 20px; }

.field { margin-bottom: 18px; }
.field:last-child { margin-bottom: 0; }
.field > label {
  display: flex; align-items: baseline; gap: 8px;
  font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-muted); margin-bottom: 8px;
}
.field .hint { text-transform: none; letter-spacing: 0; color: var(--ink-faint); font-size: 11px; }

textarea, input[type="text"], input[type="email"], input[type="password"], input[type="number"] {
  width: 100%; background: var(--bg); color: var(--ink);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 12px 14px; font-family: var(--font-mono); font-size: 13px;
  resize: vertical; outline: none; transition: border-color .15s, box-shadow .15s;
}
textarea:focus, input[type="text"]:focus, input[type="email"]:focus,
input[type="password"]:focus, input[type="number"]:focus {
  border-color: var(--teal); box-shadow: 0 0 0 3px rgba(0, 224, 198, 0.16);
}
textarea { min-height: 150px; line-height: 1.6; }

.row { display: flex; gap: 10px; flex-wrap: wrap; }
.row .field { flex: 1; margin-bottom: 0; }

.btn {
  font-family: var(--font-body); font-weight: 600; font-size: 14px;
  border-radius: var(--radius-sm); padding: 11px 18px; cursor: pointer;
  border: 1px solid var(--border-strong); background: var(--surface-3);
  color: var(--ink); transition: transform .08s, box-shadow .15s, background .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--ghost { background: transparent; }
.btn--primary {
  border-color: transparent;
  background: linear-gradient(96deg, var(--teal), var(--violet));
  color: #08111f; font-weight: 700; box-shadow: var(--glow-teal);
}
.btn--primary:disabled { opacity: .55; cursor: progress; transform: none; }
.btn-row { display: flex; gap: 10px; margin-top: 4px; }
.btn-row .btn { flex: 1; }

.btn--full { width: 100%; }
.btn--small { padding: 6px 9px; font-size: 12px; }
.btn--danger { border-color: color-mix(in srgb, var(--danger) 55%, var(--border)); color: var(--danger); }
.inline-form { display: inline; margin: 0; }
.account-label { color: var(--ink-faint); font-size: 11px; max-width: 180px; overflow: hidden; text-overflow: ellipsis; }

.usage-strip {
  display: flex; flex-wrap: wrap; gap: 10px 20px; margin: 18px 0 0;
  padding: 12px 16px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface); color: var(--ink-muted); font-family: var(--font-mono); font-size: 11px;
}
.usage-strip b { color: var(--ink); }
.fixed-settings {
  border-top: 1px solid var(--border); padding-top: 14px; margin-bottom: 16px;
  color: var(--ink-faint); font-size: 12px;
}
.fixed-settings b { color: var(--ink-muted); }
.job-status {
  margin-top: 12px; padding: 11px 13px; border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--violet) 12%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--violet) 38%, transparent);
  font-family: var(--font-mono); font-size: 12px; color: var(--ink);
}
.job-status[hidden] { display: none; }

/* ---------- Authentication and administration ---------- */
.auth-wrap { min-height: 68vh; display: grid; place-items: center; padding-top: 60px; padding-bottom: 60px; }
.auth-card { width: min(100%, 460px); }
.auth-card--wide { width: min(100%, 720px); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.form-error {
  margin-bottom: 18px; padding: 11px 13px; border-radius: var(--radius-sm);
  color: var(--danger); border: 1px solid color-mix(in srgb, var(--danger) 45%, transparent);
  background: color-mix(in srgb, var(--danger) 10%, var(--surface)); font-size: 13px;
}
.form-note { color: var(--ink-muted); font-size: 13px; }
.honeypot-field {
  position: absolute !important; left: -10000px !important;
  width: 1px !important; height: 1px !important; overflow: hidden !important;
}
.checkbox-row { display: flex; align-items: flex-start; gap: 10px; margin: 6px 0 20px; color: var(--ink-muted); font-size: 12px; }
.checkbox-row input { margin-top: 3px; accent-color: var(--teal); }
.checkbox-row--optional {
  padding: 12px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--teal) 5%, var(--surface));
}
.legal-wrap { padding-top: 48px; padding-bottom: 72px; }
.legal-card { width: min(100%, 900px); margin: 0 auto; }
.legal-card h1 { font-family: var(--font-display); }
.legal-card p { color: var(--ink-muted); }
.legal-version { margin-top: -8px; color: var(--ink-faint) !important; font-size: 12px; }
.legal-section { border-top: 1px solid var(--border); margin-top: 26px; padding-top: 18px; }
.legal-section h2 { font-family: var(--font-display); font-size: 18px; margin: 0 0 10px; }
.legal-section p { margin: 8px 0; }
.legal-section li { color: var(--ink-muted); margin: 7px 0; }
.legal-section b { color: var(--ink); }

.admin-wrap { padding-top: 44px; padding-bottom: 70px; }
.admin-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; }
.admin-head h1 { margin: 0; font-family: var(--font-display); }
.admin-service { margin: 18px 0; }
.inline-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.admin-service .inline-actions { justify-content: space-between; }
.admin-controls { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.admin-table-wrap { overflow-x: auto; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.admin-table th, .admin-table td { padding: 12px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
.admin-table th { color: var(--ink-faint); text-transform: uppercase; letter-spacing: .08em; }
.admin-table td span { color: var(--ink-faint); }
.small-input { width: 92px !important; padding: 6px 8px !important; }

/* Advanced params */
details.advanced { margin-top: 4px; border-top: 1px solid var(--border); padding-top: 16px; }
details.advanced > summary {
  cursor: pointer; font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-muted); list-style: none; user-select: none;
}
details.advanced > summary::-webkit-details-marker { display: none; }
details.advanced > summary::before { content: "▸ "; color: var(--teal); }
details.advanced[open] > summary::before { content: "▾ "; }
.slider { margin-top: 16px; }
.slider label { display: flex; justify-content: space-between; font-size: 12px; color: var(--ink-muted); margin-bottom: 6px; }
.slider label b { font-family: var(--font-mono); color: var(--teal); }
input[type="range"] {
  width: 100%; accent-color: var(--teal); height: 4px; cursor: pointer;
}

/* ---------- Spectrum plot ---------- */
.plot-panel { min-height: 420px; display: flex; flex-direction: column; }
.plot-wrap { position: relative; flex: 1; padding: 8px 6px 4px; }
#spectrum { width: 100%; height: 100%; display: block; overflow: visible; }
.plot-empty {
  position: absolute; inset: 0; display: grid; place-items: center;
  color: var(--ink-faint); font-family: var(--font-mono); font-size: 13px;
  text-align: center; padding: 24px; pointer-events: none;
}
.plot-legend {
  display: flex; align-items: center; gap: 10px; padding: 12px 20px 16px;
  font-size: 11px; color: var(--ink-faint); font-family: var(--font-mono);
}
.legend-ramp {
  height: 8px; flex: 1; border-radius: 5px;
  background: linear-gradient(90deg, var(--ramp-0), var(--ramp-1) 40%, var(--ramp-2) 75%, var(--ramp-3));
}
.peak-tip {
  position: absolute; pointer-events: none; opacity: 0; transform: translate(-50%, -8px);
  background: var(--surface-3); border: 1px solid var(--border-strong);
  border-radius: 8px; padding: 6px 9px; font-family: var(--font-mono); font-size: 11px;
  white-space: nowrap; transition: opacity .12s; z-index: 5; box-shadow: var(--shadow);
}
.peak-tip b { color: var(--amber); }

/* ---------- Results ---------- */
.results { margin: 30px 0 60px; scroll-margin-top: 80px; }
.results[hidden] { display: none; }
.results__head {
  display: flex; align-items: flex-end; gap: 16px; flex-wrap: wrap; margin-bottom: 18px;
}
.results__head h2 {
  font-family: var(--font-display); font-weight: 800; font-size: 26px; margin: 0;
  letter-spacing: -0.01em;
}
.statline { display: flex; gap: 10px; flex-wrap: wrap; margin-left: auto; }
.stat {
  font-family: var(--font-mono); font-size: 12px; color: var(--ink-muted);
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 999px; padding: 5px 12px;
}
.stat b { color: var(--ink); }

.notice {
  display: flex; gap: 10px; align-items: flex-start;
  background: color-mix(in srgb, var(--amber) 12%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--amber) 40%, transparent);
  color: var(--ink); border-radius: var(--radius-sm); padding: 12px 15px;
  font-size: 13px; margin-bottom: 20px;
}
.notice[hidden] { display: none; }
.notice svg { flex: none; color: var(--amber); margin-top: 1px; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(268px, 1fr)); gap: 16px; }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; position: relative;
  display: flex; flex-direction: column;
  transition: transform .12s, border-color .15s, box-shadow .15s;
  opacity: 0; transform: translateY(14px);
}
.card.in { opacity: 1; transform: none; }
.card:hover { transform: translateY(-3px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.card--top { border-color: color-mix(in srgb, var(--amber) 55%, var(--border)); }
.card--top::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: linear-gradient(90deg, var(--magenta), var(--amber));
}

.card__rank {
  position: absolute; top: 12px; left: 12px; z-index: 2;
  font-family: var(--font-mono); font-size: 12px; font-weight: 700;
  color: var(--ink); background: color-mix(in srgb, var(--bg) 70%, transparent);
  border: 1px solid var(--border); border-radius: 8px; padding: 3px 8px;
  backdrop-filter: blur(6px);
}
.card__match {
  position: absolute; top: 12px; right: 12px; z-index: 2;
  font-size: 10px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: #06231d; background: var(--teal); border-radius: 7px; padding: 3px 7px;
}
.card__paper {
  background: var(--paper); aspect-ratio: 4 / 3; display: grid; place-items: center;
  padding: 10px; border-bottom: 1px solid var(--border);
}
.card__paper svg { width: 100%; height: 100%; }
.card__body { padding: 14px 15px 16px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.smiles-row { display: flex; align-items: center; gap: 8px; }
.smiles {
  font-family: var(--font-mono); font-size: 12.5px; color: var(--ink);
  word-break: break-all; line-height: 1.45; flex: 1;
}
.copy-btn {
  flex: none; width: 28px; height: 28px; border-radius: 7px; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--ink-muted);
  display: grid; place-items: center;
}
.copy-btn:hover { color: var(--teal); border-color: var(--teal); }
.meta { display: flex; gap: 14px; font-size: 12px; color: var(--ink-muted); font-family: var(--font-mono); }
.meta .k { color: var(--ink-faint); }

.conf { margin-top: auto; }
.conf__label { display: flex; justify-content: space-between; font-size: 11px; color: var(--ink-muted); margin-bottom: 5px; }
.conf__label b { font-family: var(--font-mono); color: var(--ink); }
.conf__track { height: 8px; border-radius: 5px; background: var(--surface-3); overflow: hidden; }
.conf__fill {
  height: 100%; width: 0; border-radius: 5px;
  background: linear-gradient(90deg, var(--ramp-0), var(--ramp-1) 45%, var(--ramp-2) 78%, var(--ramp-3));
  transition: width .8s cubic-bezier(.2,.7,.2,1);
}

/* ---------- Footer & modals ---------- */
.footer {
  border-top: 1px solid var(--border); padding: 26px 0 40px; margin-top: 30px;
  color: var(--ink-faint); font-size: 13px;
}
.footer .aff { color: var(--ink-muted); }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(4, 6, 14, 0.6); backdrop-filter: blur(4px);
  display: none; place-items: center; z-index: 60; padding: 24px;
}
.modal-backdrop.open { display: grid; }
.modal {
  background: var(--surface); border: 1px solid var(--border-strong);
  border-radius: var(--radius); max-width: 560px; width: 100%; padding: 26px 28px;
  box-shadow: var(--shadow); max-height: 84vh; overflow: auto;
}
.modal h3 { font-family: var(--font-display); margin: 0 0 12px; font-size: 20px; }
.modal p { color: var(--ink-muted); font-size: 14px; }
.modal .cite {
  font-family: var(--font-mono); font-size: 12px; background: var(--bg);
  border: 1px solid var(--border); border-radius: 10px; padding: 14px; color: var(--ink);
  white-space: pre-wrap; word-break: break-word;
}
.contact-intro { margin-bottom: 16px; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.contact-item {
  padding: 14px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface-2); overflow-wrap: anywhere;
}
.contact-item > b { color: var(--ink); }
.contact-item p { margin: 7px 0 10px; font-size: 13px; }
.contact-address { margin-top: 16px; color: var(--ink-faint) !important; font-size: 12px !important; }
.modal__close { float: right; }

.toast {
  position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--surface-3); border: 1px solid var(--border-strong); color: var(--ink);
  padding: 10px 18px; border-radius: 999px; font-size: 13px; box-shadow: var(--shadow);
  opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; z-index: 80;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .card { opacity: 1; transform: none; }
}

@media (max-width: 720px) {
  .topbar__inner { gap: 6px; flex-wrap: wrap; }
  .account-label { display: none; }
  .form-grid { grid-template-columns: 1fr; }
  .admin-head { align-items: flex-start; flex-direction: column; }
  .contact-grid { grid-template-columns: 1fr; }
}