/* Spectra Predictor — matches the tokens of mika-riesterer.de */

:root {
  --font-main: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --font-display: 'EB Garamond', serif;

  --color-bg: #07090e;
  --color-panel-bg: rgba(13, 17, 28, 0.7);
  --color-panel-bg-hover: rgba(22, 28, 45, 0.85);
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-glow: rgba(255, 255, 255, 0.15);
  --color-cyan: #00f0ff;
  --color-purple: #c084fc;
  --color-green: #10b981;
  --color-amber: #f0b429;
  --color-red: #f87171;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #475569;

  --glow-cyan: 0 0 25px rgba(0, 240, 255, 0.2);
  --glow-purple: 0 0 25px rgba(192, 132, 252, 0.2);
  --transition-smooth: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 1.25rem 5rem;
  background: var(--color-bg);
  background-image:
    radial-gradient(ellipse 80% 60% at 15% -5%, rgba(0, 240, 255, 0.07), transparent 60%),
    radial-gradient(ellipse 70% 60% at 95% 15%, rgba(192, 132, 252, 0.07), transparent 60%);
  background-attachment: fixed;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-weight: 300;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1080px; margin: 0 auto; }

/* --- back link ----------------------------------------------------- */
.back-home {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 1.75rem 0 0 0.25rem;
  padding: 0.5rem 1.1rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-panel-bg);
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-decoration: none;
  transition: var(--transition-smooth);
}
.back-home:hover {
  color: var(--text-primary);
  border-color: var(--color-border-glow);
  background: var(--color-panel-bg-hover);
}

/* --- header --------------------------------------------------------- */
.page-head { text-align: center; padding: 2.5rem 0 2rem; }
.page-head h1 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  background: linear-gradient(120deg, #ffffff 15%, var(--color-cyan) 55%, var(--color-purple) 95%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lede {
  max-width: 62ch;
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: 1rem;
}

/* --- panels --------------------------------------------------------- */
.panel {
  margin-bottom: 1.5rem;
  padding: 1.6rem;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  background: var(--color-panel-bg);
  backdrop-filter: blur(12px);
}
.panel h2 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 600;
}
.muted { color: var(--text-secondary); font-size: 0.9rem; }

/* --- examples & chips ------------------------------------------------ */
.examples { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem; margin-bottom: 1.1rem; }
.examples-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.chip-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip {
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 0.82rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}
.chip:hover {
  color: var(--text-primary);
  border-color: var(--color-cyan);
  box-shadow: var(--glow-cyan);
}
.chip.static { cursor: default; }
.chip.static:hover { color: var(--text-secondary); border-color: var(--color-border); box-shadow: none; }

/* --- guidelines ------------------------------------------------------ */
.guide {
  margin-bottom: 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.015);
}
.guide summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 1rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  cursor: pointer;
  list-style: none;
}
.guide summary::-webkit-details-marker { display: none; }
.guide .plus { color: var(--text-muted); font-size: 1.1rem; }
.guide[open] .plus { transform: rotate(45deg); }
.guide .plus { transition: transform 0.25s ease; }
.guide-body { padding: 0 1rem 1rem; color: var(--text-secondary); font-size: 0.88rem; }
.guide-body ul { margin: 0.5rem 0; padding-left: 1.1rem; }
.guide-body li { margin-bottom: 0.3rem; }
code {
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  background: rgba(0, 240, 255, 0.08);
  color: var(--color-cyan);
  font-family: var(--font-mono);
  font-size: 0.85em;
}

/* --- input ------------------------------------------------------------ */
.field-label {
  display: block;
  margin-bottom: 0.45rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
}
.input-row { display: flex; gap: 0.75rem; flex-wrap: wrap; }
#smiles {
  flex: 1 1 320px;
  min-width: 0;
  padding: 0.85rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: rgba(3, 5, 8, 0.6);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  transition: var(--transition-smooth);
}
#smiles::placeholder { color: var(--text-muted); }
#smiles:focus { outline: none; border-color: var(--color-cyan); box-shadow: var(--glow-cyan); }

.cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border: none;
  border-radius: 10px;
  background: linear-gradient(120deg, #7c3aed, #a855f7);
  color: #fff;
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
}
.cta:hover { box-shadow: var(--glow-purple); transform: translateY(-1px); }
.cta:disabled { opacity: 0.55; cursor: progress; transform: none; }

.error {
  margin: 0.85rem 0 0;
  padding: 0.7rem 0.9rem;
  border: 1px solid rgba(248, 113, 113, 0.35);
  border-radius: 8px;
  background: rgba(248, 113, 113, 0.08);
  color: #fca5a5;
  font-family: var(--font-mono);
  font-size: 0.83rem;
}

/* --- options ---------------------------------------------------------- */
.options {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}
.options > label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.options select {
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: rgba(3, 5, 8, 0.6);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.options select:focus { outline: none; border-color: var(--color-cyan); }

.toggle {
  flex-direction: row !important;
  align-items: center;
  gap: 0.6rem !important;
  font-size: 0.85rem !important;
  color: var(--text-secondary) !important;
  cursor: pointer;
  align-self: flex-end;
}
.toggle input { position: absolute; opacity: 0; pointer-events: none; }
.toggle .track {
  width: 38px; height: 20px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  transition: var(--transition-smooth);
  display: inline-block;
  position: relative;
  flex: none;
}
.toggle .thumb {
  position: absolute; top: 3px; left: 3px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--text-secondary);
  transition: var(--transition-smooth);
}
.toggle input:checked + .track { background: rgba(124, 58, 237, 0.55); }
.toggle input:checked + .track .thumb { left: 21px; background: #fff; }

/* --- summary ---------------------------------------------------------- */
.summary { display: grid; grid-template-columns: minmax(240px, 380px) 1fr; gap: 1.75rem; align-items: start; }
.structure {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: rgba(3, 5, 8, 0.45);
  padding: 0.5rem;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.structure svg { max-height: 300px; }
dl#properties {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.3rem 1.25rem;
  margin: 0.75rem 0 1rem;
  font-size: 0.88rem;
}
dl#properties dt { color: var(--text-muted); }
dl#properties dd { margin: 0; font-family: var(--font-mono); color: var(--text-primary); }
.warnings {
  margin-top: 1rem;
  padding: 0.6rem 0.8rem;
  border-left: 2px solid var(--color-amber);
  background: rgba(240, 180, 41, 0.06);
  color: #fcd34d;
  font-size: 0.82rem;
}

/* --- tabs -------------------------------------------------------------- */
.tabs { display: flex; gap: 0.4rem; margin-bottom: 1.25rem; padding: 0.3rem; border: 1px solid var(--color-border); border-radius: 10px; background: rgba(3, 5, 8, 0.4); width: fit-content; }
.tab {
  padding: 0.5rem 1.1rem;
  border: none;
  border-radius: 7px;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}
.tab:hover { color: var(--text-primary); }
.tab.active { background: rgba(255, 255, 255, 0.07); color: var(--text-primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.plot-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 1rem; flex-wrap: wrap; margin-bottom: 0.6rem; }
.plot-caption { margin: 0; color: var(--text-secondary); font-size: 0.85rem; }
.plot-tools { display: flex; gap: 0.4rem; }
.ghost {
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 7px;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 0.78rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}
.ghost:hover { color: var(--text-primary); border-color: var(--color-border-glow); }

.canvas-wrap {
  height: 320px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: rgba(3, 5, 8, 0.55);
  overflow: hidden;
}
canvas { width: 100%; height: 100%; display: block; touch-action: none; cursor: crosshair; }
.hint { margin: 0.5rem 0 1rem; color: var(--text-muted); font-size: 0.75rem; }

/* --- tables ------------------------------------------------------------ */
.table-wrap { overflow-x: auto; }
table.peaks { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
table.peaks th {
  padding: 0.5rem 0.7rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: left;
  white-space: nowrap;
}
table.peaks td {
  padding: 0.5rem 0.7rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  vertical-align: top;
}
table.peaks td.num { font-family: var(--font-mono); color: var(--text-primary); white-space: nowrap; }
table.peaks tr:hover td { background: rgba(255, 255, 255, 0.02); }
.tag {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 5px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
}
.tag.cyan { background: rgba(0, 240, 255, 0.12); color: var(--color-cyan); }
.tag.purple { background: rgba(192, 132, 252, 0.14); color: var(--color-purple); }
.tag.green { background: rgba(16, 185, 129, 0.14); color: var(--color-green); }
.tag.amber { background: rgba(240, 180, 41, 0.14); color: var(--color-amber); }
.tag.red { background: rgba(248, 113, 113, 0.14); color: var(--color-red); }

/* --- dropzone & analysis ------------------------------------------------ */
.dropzone {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  align-items: center;
  justify-content: center;
  margin-top: 1rem;
  padding: 2rem 1rem;
  border: 1px dashed var(--color-border-glow);
  border-radius: 12px;
  background: rgba(3, 5, 8, 0.35);
  color: var(--text-secondary);
  font-size: 0.88rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition-smooth);
}
.dropzone:hover, .dropzone.over {
  border-color: var(--color-cyan);
  background: rgba(0, 240, 255, 0.05);
  color: var(--text-primary);
}
.dropzone span { color: var(--text-muted); font-size: 0.8rem; }
.dropzone strong { font-weight: 500; }

.verdict {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.9rem;
  margin: 1.25rem 0;
}
.stat {
  padding: 0.9rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
}
.stat .value { font-family: var(--font-mono); font-size: 1.4rem; color: var(--text-primary); line-height: 1.2; }
.stat .label { color: var(--text-muted); font-size: 0.75rem; }
.stat.good .value { color: var(--color-green); }
.stat.warn .value { color: var(--color-amber); }
.stat.bad .value { color: var(--color-red); }

.finding {
  padding: 0.85rem 1rem;
  margin-bottom: 0.6rem;
  border: 1px solid var(--color-border);
  border-left-width: 2px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
}
.finding.impurity { border-left-color: var(--color-amber); }
.finding.missing { border-left-color: var(--color-red); }
.finding.ok { border-left-color: var(--color-green); }
.finding h4 { margin: 0 0 0.25rem; font-size: 0.95rem; font-weight: 500; }
.finding p { margin: 0; color: var(--text-secondary); font-size: 0.83rem; }
.finding .detail { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-muted); }
h3.section { margin: 1.5rem 0 0.6rem; font-size: 0.95rem; font-weight: 500; color: var(--text-primary); }

/* --- footer ------------------------------------------------------------- */
.page-foot { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--color-border); }
.page-foot h2 { font-family: var(--font-display); font-size: 1.5rem; margin: 0 0 1.25rem; }
.method-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.5rem; }
.method-grid h3 { margin: 0 0 0.4rem; font-size: 0.95rem; font-weight: 500; color: var(--color-cyan); }
.method-grid p { margin: 0 0 0.6rem; color: var(--text-secondary); font-size: 0.85rem; }
.metric {
  font-family: var(--font-mono);
  font-size: 0.78rem !important;
  color: var(--color-green) !important;
}
.disclaimer { margin-top: 1.75rem; color: var(--text-muted); font-size: 0.78rem; }

@media (max-width: 760px) {
  .summary { grid-template-columns: 1fr; }
  .canvas-wrap { height: 260px; }
  .tabs { width: 100%; }
  .tab { flex: 1; }
}

.try-sample { margin-top: 0.75rem; }
.linkish {
  padding: 0;
  border: none;
  background: none;
  color: var(--color-cyan);
  font: inherit;
  cursor: pointer;
  border-bottom: 1px solid rgba(0, 240, 255, 0.35);
}
.linkish:hover { border-bottom-color: var(--color-cyan); }

table.peaks td.letter { color: var(--color-cyan); font-weight: 500; width: 2.5rem; }

/* --- identification ---------------------------------------------------- */
.id-grid { display: grid; gap: 1rem; margin-bottom: 1.25rem; }
.id-grid label { display: block; font-size: 0.82rem; color: var(--text-secondary); }
.id-grid textarea {
  display: block;
  width: 100%;
  margin-top: 0.4rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: rgba(3, 5, 8, 0.6);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  resize: vertical;
}
.id-grid textarea:focus { outline: none; border-color: var(--color-cyan); box-shadow: var(--glow-cyan); }
.id-grid textarea::placeholder { color: var(--text-muted); }

.options input {
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: rgba(3, 5, 8, 0.6);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  min-width: 9rem;
}
.options input:focus { outline: none; border-color: var(--color-cyan); }
.options input:disabled { opacity: 0.4; }

.image-wrap { height: auto; max-height: 460px; overflow: auto; padding: 0.4rem; }
.image-wrap canvas { width: auto; max-width: 100%; height: auto; cursor: crosshair; }

.candidates { display: grid; gap: 1rem; }
.candidate {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  overflow: hidden;
}
.candidate-head {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--color-border);
}
.candidate-head .rank { font-family: var(--font-mono); font-size: 1rem; color: var(--color-cyan); }
.candidate-body { display: grid; grid-template-columns: 280px 1fr; gap: 1.25rem; padding: 1rem; align-items: start; }
.candidate-structure {
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: rgba(3, 5, 8, 0.45);
  padding: 0.4rem;
  min-height: 170px;
}
dl.candidate-stats {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.25rem 1rem;
  margin: 0 0 0.9rem;
  font-size: 0.85rem;
}
dl.candidate-stats dt { color: var(--text-muted); }
dl.candidate-stats dd { margin: 0; font-family: var(--font-mono); color: var(--text-primary); }
dl.candidate-stats dd.smiles { font-size: 0.75rem; word-break: break-all; color: var(--text-secondary); }
.candidate details.guide { margin: 0 1rem 1rem; }

@media (max-width: 760px) {
  .candidate-body { grid-template-columns: 1fr; }
}