/* ─── Reset & Variables ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --accent:      #6366f1;
  --accent-dark: #4f46e5;
  --bg:          #f9fafb;
  --surface:     #ffffff;
  --border:      #e5e7eb;
  --text:        #111827;
  --muted:       #6b7280;
  --error:       #dc2626;
  --radius:      12px;
  --shadow:      0 4px 24px rgba(0,0,0,.08);
  --transition:  0.35s ease;

  /* trait colours */
  --c-openness:          #8b5cf6;
  --c-conscientiousness: #0ea5e9;
  --c-extraversion:      #f59e0b;
  --c-agreeableness:     #10b981;
  --c-neuroticism:       #ef4444;
}

/* ─── Base ──────────────────────────────────────────────────────────────── */
body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 2rem 1rem 4rem;
}

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

/* ─── Layout ────────────────────────────────────────────────────────────── */
.container {
  max-width: 640px;
  margin: 0 auto;
}

/* ─── Header ────────────────────────────────────────────────────────────── */
header {
  text-align: center;
  margin-bottom: 2.5rem;
}

header h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--accent) 0%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

header p {
  margin-top: .5rem;
  color: var(--muted);
  font-size: .95rem;
}

/* ─── Card ──────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

/* ─── Form ──────────────────────────────────────────────────────────────── */
.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: .4rem;
}

input[type="text"],
input[type="number"] {
  width: 100%;
  padding: .65rem .85rem;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  color: var(--text);
  background: var(--bg);
  transition: border-color .15s;
  outline: none;
}

input[type="text"]:focus,
input[type="number"]:focus {
  border-color: var(--accent);
  background: #fff;
}

.error-text {
  color: var(--error);
  font-size: .82rem;
  margin-top: .35rem;
  min-height: 1.1em;
}

/* ─── Trait sliders ─────────────────────────────────────────────────────── */
.sliders-toggle {
  display: flex;
  align-items: center;
  gap: .5rem;
  cursor: pointer;
  font-size: .88rem;
  color: var(--muted);
  margin-bottom: 1rem;
  user-select: none;
}

.sliders-toggle input { cursor: pointer; accent-color: var(--accent); }

.sliders-panel { display: none; }
.sliders-panel.open { display: block; }

.slider-row {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: .75rem;
}

.slider-row .trait-label {
  width: 7rem;
  flex-shrink: 0;
  font-size: .83rem;
  font-weight: 500;
  color: var(--text);
  text-transform: capitalize;
}

.slider-row input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  cursor: pointer;
}

.slider-row .slider-val {
  width: 2.2rem;
  text-align: right;
  font-size: .83rem;
  font-weight: 600;
  color: var(--muted);
}

/* ─── Buttons ───────────────────────────────────────────────────────────── */
.btn-row {
  display: flex;
  gap: .75rem;
  margin-top: .5rem;
}

.btn {
  flex: 1;
  padding: .7rem 1rem;
  border: none;
  border-radius: 8px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .15s, transform .1s;
}

.btn:active { transform: scale(.98); }

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover { background: var(--accent-dark); }

.btn-secondary {
  background: var(--bg);
  color: var(--text);
  border: 1.5px solid var(--border);
}

.btn-secondary:hover { background: var(--border); }

/* ─── Results panel ─────────────────────────────────────────────────────── */
#results {
  display: none;
  animation: fadeIn .4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.result-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: .5rem;
}

.result-name {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -.02em;
}

.dominance-badge {
  font-size: .8rem;
  font-weight: 700;
  color: #fff;
  background: var(--accent);
  padding: .25rem .65rem;
  border-radius: 999px;
}

/* ─── Trait bars ────────────────────────────────────────────────────────── */
.trait-bar-row {
  margin-bottom: 1rem;
}

.trait-bar-header {
  display: flex;
  justify-content: space-between;
  font-size: .82rem;
  margin-bottom: .3rem;
}

.trait-bar-header .trait-name {
  font-weight: 600;
  text-transform: capitalize;
}

.trait-bar-header .trait-score {
  font-weight: 700;
  color: var(--muted);
}

.bar-track {
  height: 10px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  width: 0;
  border-radius: 999px;
  transition: width var(--transition);
}

.bar-fill.openness          { background: var(--c-openness); }
.bar-fill.conscientiousness { background: var(--c-conscientiousness); }
.bar-fill.extraversion      { background: var(--c-extraversion); }
.bar-fill.agreeableness     { background: var(--c-agreeableness); }
.bar-fill.neuroticism       { background: var(--c-neuroticism); }

/* ─── Action buttons ────────────────────────────────────────────────────── */
.action-row {
  display: flex;
  gap: .75rem;
  margin-top: 1.5rem;
}

.action-row .btn { font-size: .85rem; padding: .55rem .85rem; flex: initial; }

.copy-feedback {
  font-size: .8rem;
  color: var(--accent);
  align-self: center;
  opacity: 0;
  transition: opacity .2s;
}

.copy-feedback.show { opacity: 1; }

/* ─── AI Analysis section ────────────────────────────────────────────────── */
#analyse-section { margin-top: 1.25rem; }

.analyse-loading {
  color: var(--muted);
  font-style: italic;
  font-size: .9rem;
}

.analyse-error {
  color: var(--error);
  font-size: .9rem;
}

.analyse-report {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: inherit;
  font-size: .9rem;
  line-height: 1.65;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  color: var(--text);
}

/* ─── Footer ────────────────────────────────────────────────────────────── */
footer {
  text-align: center;
  margin-top: 3rem;
  font-size: .8rem;
  color: var(--muted);
}