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

/* Dark theme (default) */
:root {
  --bg:          #141414;
  --bg-card:     #1e1e1e;
  --bg-card-alt: #252525;
  --border:      #2e2e2e;
  --text:        #e8e8e8;
  --text-muted:  #888;
  --text-dim:    #555;
  --accent:      #c8a04a;
  --radius:      12px;
  --radius-sm:   8px;
  --transition:  0.18s ease;
  --shadow:      0 2px 16px rgba(0,0,0,0.45);
}

/* Light theme */
[data-theme="light"] {
  --bg:          #f2efe9;
  --bg-card:     #ffffff;
  --bg-card-alt: #ece9e3;
  --border:      #d8d3ca;
  --text:        #1a1a1a;
  --text-muted:  #5a5a5a;
  --text-dim:    #aaa;
  --accent:      #a07830;
  --shadow:      0 2px 16px rgba(0,0,0,0.10);
}

html { font-size: 17px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ─── App container ────────────────────────────────────────── */
#app {
  flex: 1;
  display: flex;
  flex-direction: column;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  padding: 0 24px 40px;
}

/* ─── Header ───────────────────────────────────────────────── */
header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 0 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}

.back-btn {
  display: none;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  width: 40px; height: 40px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 20px;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--transition), border-color var(--transition);
}
.back-btn:hover { background: var(--bg-card-alt); border-color: var(--accent); }
.back-btn.visible { display: flex; }

.header-titles { flex: 1; min-width: 0; }

h1 {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--accent);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.subtitle {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 3px;
}

/* ─── Theme toggle ─────────────────────────────────────────── */
.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 40px; height: 40px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 17px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* ─── Screens ──────────────────────────────────────────────── */
.screen { display: none; }
.screen.active { display: block; animation: fadeIn 0.2s ease; }

/* ─── Section label ────────────────────────────────────────── */
.section-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 16px;
}

/* ══════════════════════════════════════════════════════════════
   SCREEN 1 — Intro + Metal grid + SEO footer
══════════════════════════════════════════════════════════════ */
.screen1-intro {
  margin-bottom: 32px;
}

.screen1-h1 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  text-transform: none;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 12px;
  white-space: normal;
  overflow: visible;
  text-overflow: unset;
}

.screen1-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 640px;
}

.screen1-seo {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.screen1-seo h2 {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: none;
  letter-spacing: 0;
}

@media (max-width: 480px) {
  .screen1-h1 { font-size: 1.5rem; }
  .screen1-desc { font-size: 0.88rem; }
}


.metal-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

@media (min-width: 600px) {
  .metal-grid { grid-template-columns: repeat(5, 1fr); }
}
@media (min-width: 900px) {
  .metal-grid { grid-template-columns: repeat(9, 1fr); gap: 12px; }
}

.metal-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 10px 18px;
  cursor: pointer;
  text-align: center;
  transition: transform var(--transition), border-color var(--transition),
              background var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.metal-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, var(--metal-color, #888) 0%, transparent 70%);
  opacity: 0.08;
  transition: opacity var(--transition);
}

.metal-card:hover {
  border-color: var(--metal-color, var(--accent));
  transform: translateY(-3px);
  box-shadow: 0 10px 28px color-mix(in srgb, var(--metal-color, #888) 22%, transparent);
}
.metal-card:hover::before { opacity: 0.2; }
.metal-card:active { transform: translateY(0); }

.metal-symbol {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1;
  color: var(--metal-color, var(--accent));
  margin-bottom: 8px;
  letter-spacing: -1px;
}

.metal-name {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
}

.metal-count {
  font-size: 0.68rem;
  color: var(--text-dim);
  margin-top: 4px;
}

/* ══════════════════════════════════════════════════════════════
   SCREEN 2 — Ore list (two-column on desktop)
══════════════════════════════════════════════════════════════ */
.screen2-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}

@media (min-width: 760px) {
  .screen2-layout {
    grid-template-columns: 1fr 300px;
  }
}

/* Left column */
.screen2-left .screen2-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

/* Right column — sticky result panel */
.screen2-right {
  position: sticky;
  top: 20px;
}

.result-panel {
  background: var(--bg-card);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
}

.result-panel-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.result-panel-value {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -1px;
  line-height: 1;
  margin-bottom: 6px;
  min-height: 3.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.result-panel-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  min-height: 1.2em;
}

/* On mobile, show the old pill instead of right panel */
.result-pill-mobile {
  background: var(--bg-card);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent);
  white-space: nowrap;
  text-align: center;
  display: none;
}

@media (max-width: 759px) {
  .result-pill-mobile { display: inline-block; }
  .screen2-right { display: none; }
}

/* ─── Budget bar ───────────────────────────────────────────── */
.budget-bar-wrap {
  margin-bottom: 16px;
}

.budget-bar-track {
  height: 6px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 6px;
}

.budget-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 999px;
  transition: width 0.3s ease, background 0.3s ease;
}
.budget-bar-fill.near-full { background: #e67e22; }
.budget-bar-fill.full      { background: #c0392b; }

.budget-bar-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ─── Ore list ─────────────────────────────────────────────── */
.ore-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ore-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  width: 100%;
  text-align: left;
}

.ore-item:hover {
  border-color: var(--accent);
  background: var(--bg-card-alt);
}

.ore-item.has-value {
  border-color: color-mix(in srgb, var(--accent) 55%, transparent);
}

/* Metal % pill (left side of row) */
.ore-metal-pct {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  color: var(--accent);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 0.82rem;
  font-weight: 700;
  white-space: nowrap;
  flex-shrink: 0;
  min-width: 58px;
  text-align: center;
}

/* Ore name / formula / type */
.ore-info { flex: 1; min-width: 0; }

.ore-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ore-formula {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.ore-type {
  font-size: 0.68rem;
  color: var(--text-dim);
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Selected % badge (right side, prominent) */
.ore-pct-badge {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--accent);
  opacity: 0;
  flex-shrink: 0;
  transition: opacity var(--transition);
  min-width: 52px;
  text-align: right;
}
.ore-item.has-value .ore-pct-badge { opacity: 1; }

.chevron {
  color: var(--text-dim);
  font-size: 1.2rem;
  flex-shrink: 0;
}

/* ══════════════════════════════════════════════════════════════
   SCREEN 3 — Slider (two-column on desktop)
══════════════════════════════════════════════════════════════ */
.screen3-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  align-items: start;
}

@media (min-width: 760px) {
  .screen3-layout {
    grid-template-columns: 1fr 280px;
  }
}

/* ─── Ore detail header ─────────────────────────────────────── */
.ore-detail-header {
  margin-bottom: 20px;
}

.ore-detail-name {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.1;
}

.ore-detail-formula {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.ore-detail-type {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 6px;
}

.metal-content-badge {
  display: inline-block;
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  color: var(--accent);
  border-radius: 999px;
  padding: 6px 18px;
  font-size: 0.9rem;
  font-weight: 700;
  margin-top: 10px;
}

/* ─── Slider card ───────────────────────────────────────────── */
.slider-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 22px;
  margin-bottom: 12px;
}

.slider-label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 18px;
}

.slider-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.slider-value-display {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -1px;
}

/* Range input */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 7px;
  border-radius: 999px;
  background: var(--border);
  outline: none;
  cursor: pointer;
  margin-bottom: 10px;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 2px 8px color-mix(in srgb, var(--accent) 40%, transparent);
  transition: transform var(--transition);
}
input[type="range"]::-webkit-slider-thumb:active { transform: scale(1.2); }
input[type="range"]::-moz-range-thumb {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 8px color-mix(in srgb, var(--accent) 40%, transparent);
}

.slider-range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-bottom: 18px;
}

/* Budget available text */
.budget-available {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  text-align: center;
  min-height: 1.2em;
  transition: color 0.2s;
}
.budget-available.warn { color: #e67e22; font-weight: 600; }
.budget-available.full { color: #c0392b; font-weight: 600; }

/* Range selector buttons */
.range-selector {
  display: flex;
  gap: 8px;
}

.range-btn {
  flex: 1;
  background: var(--bg-card-alt);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 9px 0;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.range-btn:hover { border-color: var(--accent); color: var(--text); }
.range-btn.active {
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  border-color: var(--accent);
  color: var(--accent);
}

/* Number input row */
.number-input-row {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 16px;
}

.ore-number-input {
  flex: 1;
  background: var(--bg-card-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 600;
  padding: 11px 14px;
  outline: none;
  transition: border-color var(--transition);
}
.ore-number-input:focus { border-color: var(--accent); }

.confirm-btn {
  background: var(--accent);
  color: #111;
  border: none;
  border-radius: var(--radius-sm);
  padding: 11px 22px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: opacity var(--transition), transform var(--transition);
  white-space: nowrap;
}
.confirm-btn:hover { opacity: 0.88; }
.confirm-btn:active { transform: scale(0.97); }

/* ─── Result card (screen 3, mobile / right column) ─────────── */
.result-card {
  background: var(--bg-card);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  position: sticky;
  top: 20px;
}

.result-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.result-value {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -1px;
  line-height: 1;
  min-height: 3.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.result-subtext {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 8px;
  min-height: 1.2em;
}

/* ─── Reset button ─────────────────────────────────────────── */
.reset-btn {
  display: block;
  width: 100%;
  margin-top: 10px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 11px;
  font-size: 0.84rem;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
}
.reset-btn:hover { border-color: #c0392b; color: #c0392b; }

/* ─── Scrollbar ────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 999px; }

/* ─── Mobile tweaks ────────────────────────────────────────── */
@media (max-width: 480px) {
  html { font-size: 15px; }
  #app { padding: 0 14px 28px; }
  .metal-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .metal-symbol { font-size: 2rem; }
  .metal-card { padding: 18px 8px 14px; }
  .slider-card { padding: 18px 16px; }
  .ore-detail-name { font-size: 1.4rem; }
  .slider-value-display { font-size: 1.8rem; }
  .result-value { font-size: 2.2rem; }
}

/* ─── Animations ───────────────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Utility ──────────────────────────────────────────────── */
.hidden { display: none !important; }

/* ─── Email gate modal ─────────────────────────────────────── */
.gate-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: fadeIn 0.2s ease;
}

.gate-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow);
}

.gate-eyebrow {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.gate-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  text-transform: none;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.gate-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 24px;
}

.gate-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.gate-input {
  background: var(--bg-card-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 1rem;
  padding: 13px 16px;
  outline: none;
  width: 100%;
  transition: border-color var(--transition);
}
.gate-input:focus  { border-color: var(--accent); }
.gate-input.invalid { border-color: #c0392b; }

.gate-error {
  font-size: 0.8rem;
  color: #c0392b;
  margin-top: -4px;
}

.gate-btn {
  background: var(--accent);
  color: #111;
  border: none;
  border-radius: var(--radius-sm);
  padding: 13px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.03em;
  transition: opacity var(--transition), transform var(--transition);
}
.gate-btn:hover  { opacity: 0.88; }
.gate-btn:active { transform: scale(0.98); }

.gate-note {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-align: center;
  margin-top: 16px;
}

@media (max-width: 480px) {
  .gate-card  { padding: 28px 20px; }
  .gate-title { font-size: 1.3rem; }
}