:root {
  --gold-bright: oklch(91%   0.17   95);
  --gold-main:   oklch(83%   0.18   78);
  --gold-mid:    oklch(73%   0.19   78);
  --gold-dark:   oklch(63%   0.16   66);
  --gold-deep:   oklch(40%   0.11   65);
  --navy-1:      oklch( 9%   0.035 255);
  --navy-2:      oklch(11%   0.040 255);
  --navy-3:      oklch(16.5% 0.060 258);
}

:root, [data-theme="light"] {
  --bg:          oklch(99.5% 0.003  78);
  --bg-card:     oklch(99.8% 0.001  78);
  --tx:          oklch(11%   0.040 255);
  --tx-2:        oklch(30%   0.040 255);
  --tx-3:        oklch(52%   0.030 255);
  --br:          oklch(88%   0.012 255);
  --accent:      var(--gold-dark);
  --accent-hi:   var(--gold-main);
  --focus-ring:  oklch(63%   0.16   66 / 0.18);
  --err-bg:      oklch(97.5% 0.010  25);
  --err-tx:      oklch(42%   0.18   25);
  --err-br:      oklch(88%   0.060  25);
  --shadow:      0 2px 28px oklch(11% 0.040 255 / 0.07),
                 0 1px 4px  oklch(11% 0.040 255 / 0.04);
}

[data-theme="dark"] {
  --bg:          var(--navy-2);
  --bg-card:     var(--navy-3);
  --tx:          oklch(97%   0.008 255);
  --tx-2:        oklch(80%   0.015 255);
  --tx-3:        oklch(55%   0.020 258);
  --br:          oklch(22%   0.045 258);
  --accent:      var(--gold-main);
  --accent-hi:   var(--gold-bright);
  --focus-ring:  oklch(83%   0.18   78 / 0.15);
  --err-bg:      oklch(13%   0.025  25);
  --err-tx:      oklch(72%   0.12   25);
  --err-br:      oklch(22%   0.055  25);
  --shadow:      0 4px 32px oklch(5% 0.020 255 / 0.45);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-kerning: normal;
  font-optical-sizing: auto;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 1.0625rem;
  line-height: 1.6;
  background: var(--bg);
  color: var(--tx);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 20px;
  -webkit-font-smoothing: antialiased;
  transition: background 0.25s ease, color 0.25s ease;
}

/* ── Card ───────────────────────────────────────── */
.login-card {
  background: var(--bg-card);
  border: 1px solid var(--br);
  border-top: 3px solid var(--accent);
  border-radius: 2px;
  box-shadow: var(--shadow);
  padding: 44px 40px 40px;
  width: 100%;
  max-width: 420px;
  transition: background 0.25s ease, border-color 0.25s ease;
}

/* ── Brand ──────────────────────────────────────── */
.brand {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-bottom: 28px;
}
.brand-logo {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
}
.brand-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.brand-name {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--tx);
  line-height: 1;
}
.brand-sub {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--tx-3);
}

.brand-rule {
  height: 1px;
  background: var(--br);
  margin-bottom: 28px;
  transition: background 0.25s ease;
}

/* ── Heading ────────────────────────────────────── */
.login-title {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--tx);
  line-height: 1.1;
  margin-bottom: 6px;
}
.login-subtitle {
  font-size: 1rem;
  color: var(--tx-3);
  line-height: 1.5;
  margin-bottom: 28px;
}

/* ── Form ───────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}
label {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--tx-3);
}
input[type="email"],
input[type="password"],
input[type="text"].password-input {
  width: 100%;
  padding: 11px 42px 11px 14px;
  border: 1px solid var(--br);
  border-radius: 2px;
  background: var(--bg);
  color: var(--tx);
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.25s ease;
}
input[type="email"] { padding-right: 14px; }
input[type="email"]:focus,
input[type="password"]:focus,
input[type="text"].password-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--focus-ring);
}
input::placeholder { color: var(--tx-3); opacity: 0.55; }

.password-wrap {
  position: relative;
}
.toggle-pw {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--tx-3);
  display: flex;
  align-items: center;
  transition: color 0.18s ease;
}
.toggle-pw:hover { color: var(--accent); }
.toggle-pw svg { width: 17px; height: 17px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* ── Error ──────────────────────────────────────── */
.error-box {
  display: none;
  align-items: flex-start;
  gap: 9px;
  background: var(--err-bg);
  border: 1px solid var(--err-br);
  border-radius: 2px;
  padding: 10px 14px;
  margin-bottom: 16px;
  font-size: 0.9375rem;
  color: var(--err-tx);
  line-height: 1.45;
  transition: background 0.25s ease;
}
.error-box.visible { display: flex; }
.error-icon { flex-shrink: 0; margin-top: 2px; }

/* ── Submit ─────────────────────────────────────── */
.btn-submit {
  width: 100%;
  padding: 14px 28px;
  background: var(--accent);
  color: var(--navy-1);
  border: none;
  border-radius: 2px;
  font-family: 'Rajdhani', sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  margin-top: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background 0.18s ease, transform 0.15s ease, opacity 0.18s ease;
}
.btn-submit:hover:not(:disabled) {
  background: var(--accent-hi);
  transform: translateY(-1px);
}
.btn-submit:active:not(:disabled) { transform: translateY(0); }
.btn-submit:disabled { opacity: 0.5; cursor: not-allowed; }

.spinner {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid oklch(9% 0.035 255 / 0.25);
  border-top-color: var(--navy-1);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
.btn-submit.loading .spinner { display: block; }
.btn-submit.loading .btn-label { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Forgot link ────────────────────────────────── */
.forgot-link {
  display: block;
  margin-top: 20px;
  text-align: center;
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--tx-3);
  text-decoration: none;
  transition: color 0.18s ease;
}
.forgot-link:hover { color: var(--accent); }

/* ── Footer ─────────────────────────────────────── */
.login-footer {
  margin-top: 24px;
  text-align: center;
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--tx-3);
}

/* ── Theme toggle ────────────────────────────────── */
.dark-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--bg-card);
  border: 1px solid var(--br);
  border-radius: 2px;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: background 0.25s ease, border-color 0.25s ease;
}
.dark-toggle:hover { border-color: var(--accent); }
.dark-toggle svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: var(--tx-3);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke 0.25s ease;
}
.dark-toggle:hover svg { stroke: var(--accent); }

:focus { outline: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}
@media (max-width: 480px) {
  .login-card { padding: 32px 24px 28px; }
}