/* ── Design tokens ─────────────────────────────────────── */
:root {
  --navy:        #0d2240;
  --navy-mid:    #163354;
  --navy-light:  #1e4470;
  --gold:        #c9a84c;
  --gold-light:  #e2c87a;
  --gold-dim:    #8a6c2a;

  --bg:          #f4f6fa;
  --surface:     #ffffff;
  --surface-2:   #eef1f7;
  --border:      #d4d9e8;
  --text:        #1a2540;
  --text-muted:  #5a6582;
  --shadow:      0 8px 40px rgba(13,34,64,.13);
  --input-bg:    #f8f9fd;
  --input-focus: #ffffff;
  --error-bg:    #fff2f2;
  --error-text:  #c0392b;
  --error-border:#f5c6c6;
}

[data-theme="dark"] {
  --bg:          #0a1628;
  --surface:     #0f2035;
  --surface-2:   #162845;
  --border:      #1e3a5f;
  --text:        #dce6f5;
  --text-muted:  #7a95bb;
  --shadow:      0 8px 40px rgba(0,0,0,.45);
  --input-bg:    #0d1f38;
  --input-focus: #102540;
  --error-bg:    #1f0e0e;
  --error-text:  #f08080;
  --error-border:#4a1f1f;
}

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

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .25s, color .25s;
  position: relative;
  overflow: hidden;
}

/* ── Decorative background ─────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(201,168,76,.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 80% at 85% 90%, rgba(13,34,64,.12) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* ── Theme toggle ──────────────────────────────────────── */
.theme-toggle {
  position: fixed;
  top: 1.25rem;
  right: 1.25rem;
  z-index: 10;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: .35rem .75rem;
  display: flex;
  align-items: center;
  gap: .5rem;
  cursor: pointer;
  font-size: .8rem;
  font-weight: 600;
  color: var(--text-muted);
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
  transition: background .25s, border-color .25s, color .25s, box-shadow .2s;
  user-select: none;
}
.theme-toggle:hover {
  box-shadow: 0 4px 14px rgba(0,0,0,.14);
  color: var(--text);
}
.theme-toggle svg { flex-shrink: 0; }
.icon-sun  { display: none; }
.icon-moon { display: block; }
[data-theme="dark"] .icon-sun  { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

/* ── Card ──────────────────────────────────────────────── */
.card {
  position: relative;
  z-index: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 420px;
  padding: 2.5rem 2.25rem 2.25rem;
  transition: background .25s, border-color .25s, box-shadow .25s;
}

/* ── Logo & header ─────────────────────────────────────── */
.logo-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .75rem;
  margin-bottom: 1.75rem;
}

.logo-ring {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 3px solid var(--gold);
  padding: 3px;
  box-shadow: 0 0 0 1px rgba(201,168,76,.25), 0 4px 20px rgba(201,168,76,.15);
  transition: border-color .25s;
}

.logo-ring img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  display: block;
}

.logo-name {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--navy);
}
[data-theme="dark"] .logo-name { color: var(--gold-light); }

.logo-sub {
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 600;
  margin-top: .4rem;
}

/* ── Divider ───────────────────────────────────────────── */
.divider {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: 1.75rem;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.divider span {
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ── Form ──────────────────────────────────────────────── */
.form-group { margin-bottom: 1.1rem; }

label {
  display: block;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: .4rem;
}

.input-wrap {
  position: relative;
}

.input-icon {
  position: absolute;
  left: .9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  transition: color .2s;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: .7rem .9rem .7rem 2.6rem;
  background: var(--input-bg);
  border: 1.5px solid var(--border);
  border-radius: .65rem;
  font-size: .95rem;
  color: var(--text);
  outline: none;
  transition: border-color .2s, background .2s, box-shadow .2s;
  -webkit-appearance: none;
}

input:focus {
  border-color: var(--gold);
  background: var(--input-focus);
  box-shadow: 0 0 0 3px rgba(201,168,76,.15);
}

input:focus + .input-icon,
.input-wrap:focus-within .input-icon { color: var(--gold); }

/* ── Password toggle ───────────────────────────────────── */
.pw-toggle {
  position: absolute;
  right: .75rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: .2rem;
  border-radius: .3rem;
  display: flex;
  transition: color .2s;
}
.pw-toggle:hover { color: var(--gold); }

/* ── Error banner ──────────────────────────────────────── */
.error-box {
  display: none;
  align-items: center;
  gap: .6rem;
  padding: .7rem .9rem;
  border-radius: .65rem;
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  color: var(--error-text);
  font-size: .85rem;
  font-weight: 500;
  margin-bottom: 1.1rem;
}
.error-box.visible { display: flex; }

/* ── Submit button ─────────────────────────────────────── */
.btn-login {
  width: 100%;
  padding: .8rem;
  background: linear-gradient(135deg, var(--navy-mid) 0%, var(--navy) 100%);
  color: var(--gold-light);
  border: none;
  border-radius: .65rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .04em;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: opacity .2s, transform .1s, box-shadow .2s;
  box-shadow: 0 4px 16px rgba(13,34,64,.3);
  margin-top: .4rem;
}

.btn-login::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(201,168,76,.15) 0%, transparent 60%);
  opacity: 0;
  transition: opacity .2s;
}
.btn-login:hover::after { opacity: 1; }
.btn-login:hover { box-shadow: 0 6px 22px rgba(13,34,64,.4); }
.btn-login:active { transform: scale(.98); }
.btn-login:disabled { opacity: .6; cursor: not-allowed; transform: none; }

.btn-text { display: flex; align-items: center; justify-content: center; gap: .5rem; }

.spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(226,200,122,.35);
  border-top-color: var(--gold-light);
  border-radius: 50%;
  animation: spin .65s linear infinite;
}
.btn-login.loading .spinner { display: inline-block; }
.btn-login.loading .btn-label { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Footer ────────────────────────────────────────────── */
.card-footer {
  margin-top: 1.75rem;
  text-align: center;
  font-size: .75rem;
  color: var(--text-muted);
}

.gold-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  margin: 0 .4rem;
  vertical-align: middle;
}

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 480px) {
  .card { margin: 1rem; padding: 2rem 1.5rem 1.75rem; }
}