/* ---------- Tokens ---------- */
:root {
  --brand-teal: #2E8A96;
  --brand-teal-hover: #246d77;
  --brand-teal-pressed: #1d5962;
  --brand-navy: #475468;

  /* Scene opacities (light) */
  --scene-chart-opacity: 0.22;
  --scene-area-opacity: 0.05;
  --scene-candle-opacity: 0.18;
  --scene-tick-opacity: 0.28;

  /* Light theme (default var set, overridden below for dark) */
  --bg: #F7F8F9;
  --bg-grid: rgba(71, 84, 104, 0.05);
  --card-bg: #FFFFFF;
  --card-border: rgba(17, 24, 39, 0.08);
  --text: #0F1A24;
  --text-muted: #5B6773;
  --text-subtle: #8A95A1;
  --input-bg: #FFFFFF;
  --input-border: #D7DCE2;
  --input-border-hover: #B8C0C9;
  --input-border-focus: var(--brand-teal);
  --input-focus-ring: rgba(46, 138, 150, 0.18);
  --error: #C0392B;
  --error-bg: rgba(192, 57, 43, 0.08);
  --shadow-card: 0 1px 2px rgba(17, 24, 39, 0.04),
                 0 12px 32px -8px rgba(17, 24, 39, 0.12),
                 0 30px 60px -30px rgba(17, 24, 39, 0.12);
  --toggle-track: #E6E9ED;
  --toggle-thumb: #FFFFFF;
}

html[data-theme="dark"] {
  --bg: #0E1620;
  --bg-grid: rgba(255, 255, 255, 0.04);
  --scene-chart-opacity: 0.32;
  --scene-area-opacity: 0.06;
  --scene-candle-opacity: 0.22;
  --scene-tick-opacity: 0.22;
  --card-bg: #172130;
  --card-border: rgba(255, 255, 255, 0.06);
  --text: #E9EEF3;
  --text-muted: #9BA6B2;
  --text-subtle: #6B7684;
  --input-bg: #101925;
  --input-border: #2A3647;
  --input-border-hover: #3A4758;
  --input-border-focus: var(--brand-teal);
  --input-focus-ring: rgba(46, 138, 150, 0.28);
  --error: #F17366;
  --error-bg: rgba(241, 115, 102, 0.10);
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.4),
                 0 18px 40px -10px rgba(0, 0, 0, 0.55),
                 0 40px 80px -30px rgba(0, 0, 0, 0.6);
  --toggle-track: #263244;
  --toggle-thumb: #0E1620;
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  transition: background-color .2s ease, color .2s ease;
  position: relative;
  overflow-x: hidden;
}

/* Finance-themed background: faint grid + candles + sparkline */
.bg-scene {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.bg-scene svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.bg-scene .bg-grid line { stroke: var(--bg-grid); stroke-width: 1; }
.bg-scene .bg-chart-line {
  fill: none;
  stroke: var(--brand-teal);
  stroke-width: 1.6;
  stroke-linejoin: round;
  stroke-linecap: round;
  opacity: var(--scene-chart-opacity);
}
.bg-scene .bg-chart-area {
  fill: var(--brand-teal);
  opacity: var(--scene-area-opacity);
}
.bg-scene .bg-chart-dot {
  fill: var(--brand-teal);
  opacity: var(--scene-chart-opacity);
}
.bg-scene .bg-candle-up { fill: var(--brand-teal); }
.bg-scene .bg-candle-down { fill: var(--brand-navy); }
.bg-scene .bg-candle-up, .bg-scene .bg-candle-down {
  opacity: var(--scene-candle-opacity);
}
.bg-scene .bg-tick { stroke: var(--text-subtle); stroke-width: 1; opacity: var(--scene-tick-opacity); }
.bg-scene .bg-label { fill: var(--text-subtle); font: 10px ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; opacity: var(--scene-tick-opacity); letter-spacing: 0.08em; }

.page, .theme-toggle { position: relative; z-index: 1; }

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

/* ---------- Layout ---------- */
.page {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 48px 20px;
}

/* ---------- Card ---------- */
.card {
  width: 100%;
  max-width: 420px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  box-shadow: var(--shadow-card);
  padding: 36px 36px 28px;
  transition: background-color .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.card__head {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 28px;
}

.brand {
  display: block;
  margin-bottom: 18px;
}
.brand__logo {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}
/* In dark mode, the navy block in the mark disappears into the card; add a subtle breathing room (no visual change needed, logo already has contrast) */

.card__title {
  margin: 6px 0 0;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}
.card__sub {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

/* ---------- Form ---------- */
.form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field__label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.01em;
}
.field__input {
  appearance: none;
  width: 100%;
  height: 44px;
  padding: 0 14px;
  font: inherit;
  color: var(--text);
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 10px;
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease, background-color .2s ease;
}
.field__input::placeholder { color: var(--text-subtle); }
.field__input:hover { border-color: var(--input-border-hover); }
.field__input:focus {
  border-color: var(--input-border-focus);
  box-shadow: 0 0 0 4px var(--input-focus-ring);
}
.field__input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Input wrapper for trailing affix (e.g. password reveal) */
.field__input-wrap {
  position: relative;
  display: block;
}
.field__input--with-affix {
  padding-right: 44px;
}
.field__affix {
  position: absolute;
  top: 50%;
  right: 4px;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: transparent;
  border: none;
  border-radius: 8px;
  color: var(--text-subtle);
  cursor: pointer;
  padding: 0;
  transition: color .15s ease, background-color .15s ease;
}
.field__affix:hover { color: var(--text); background: var(--bg-grid); }
.field__affix:focus-visible {
  outline: none;
  color: var(--brand-teal);
  box-shadow: 0 0 0 3px var(--input-focus-ring);
}
.field__affix-icon { display: none; }
.field__affix .field__affix-icon--show { display: block; }
.field__affix[aria-pressed="true"] .field__affix-icon--show { display: none; }
.field__affix[aria-pressed="true"] .field__affix-icon--hide { display: block; }
.field__affix[aria-pressed="true"] { color: var(--brand-teal); }

/* ---------- Error ---------- */
.form__error {
  display: none;
  font-size: 13px;
  color: var(--error);
  background: var(--error-bg);
  border: 1px solid color-mix(in oklab, var(--error) 35%, transparent);
  padding: 10px 12px;
  border-radius: 8px;
  line-height: 1.4;
}
.form__error.is-visible { display: block; }

/* ---------- Button ---------- */
.btn {
  position: relative;
  appearance: none;
  border: none;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  letter-spacing: 0.01em;
  height: 46px;
  border-radius: 10px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: background-color .15s ease, transform .05s ease, box-shadow .15s ease, opacity .15s ease;
  margin-top: 4px;
}
.btn--primary {
  background: var(--brand-teal);
  color: #FFFFFF;
  box-shadow: 0 1px 0 rgba(255,255,255,0.06) inset,
              0 6px 16px -6px rgba(46, 138, 150, 0.55);
}
.btn--primary:hover:not(:disabled) { background: var(--brand-teal-hover); }
.btn--primary:active:not(:disabled) { background: var(--brand-teal-pressed); transform: translateY(1px); }
.btn--primary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--input-focus-ring),
              0 6px 16px -6px rgba(46, 138, 150, 0.55);
}
.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
}

.btn__spinner {
  display: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.35);
  border-top-color: #FFFFFF;
  animation: spin .7s linear infinite;
}
.btn.is-loading .btn__spinner { display: inline-block; }
.btn.is-loading .btn__label { opacity: 0.85; }

@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Footer ---------- */
.card__foot {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--card-border);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-subtle);
  text-align: center;
}
.card__foot .foot-link { color: var(--text-subtle); }
.card__foot sup { font-size: 8px; }

/* ---------- Theme toggle ---------- */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 10;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  padding: 6px 14px 6px 6px;
  font: inherit;
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
  box-shadow: 0 4px 12px -6px rgba(0,0,0,0.2);
  transition: background-color .2s ease, border-color .2s ease, color .2s ease;
}
.theme-toggle:hover { color: var(--text); }
.theme-toggle__track {
  position: relative;
  width: 38px;
  height: 22px;
  background: var(--toggle-track);
  border-radius: 999px;
  transition: background-color .2s ease;
  flex-shrink: 0;
}
.theme-toggle__thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: var(--toggle-thumb);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--brand-teal);
  box-shadow: 0 1px 3px rgba(0,0,0,0.25);
  transition: transform .22s cubic-bezier(.4,.2,.2,1), background-color .2s ease, color .2s ease;
}
html[data-theme="dark"] .theme-toggle__thumb { transform: translateX(0); }
html[data-theme="light"] .theme-toggle__thumb { transform: translateX(16px); }

.icon { display: none; }
html[data-theme="dark"] .icon--moon { display: block; }
html[data-theme="light"] .icon--sun { display: block; }

/* ---------- Responsive ---------- */
@media (max-width: 480px) {
  .card { padding: 28px 22px 22px; border-radius: 14px; }
  .card__title { font-size: 18px; }
  .theme-toggle__label { display: none; }
  .theme-toggle { padding: 4px; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}