:root {
  color-scheme: dark;
  --font-sans: "Segoe UI", "Helvetica Neue", sans-serif;
  --font-display: Georgia, "Times New Roman", serif;
  --bg: #08111f;
  --bg-elevated: rgba(10, 18, 31, 0.78);
  --bg-panel: rgba(13, 24, 42, 0.88);
  --bg-field: rgba(255, 255, 255, 0.04);
  --bg-field-focus: rgba(255, 255, 255, 0.08);
  --surface-border: rgba(148, 163, 184, 0.18);
  --text-main: #eff6ff;
  --text-muted: #94a3b8;
  --text-soft: #cbd5e1;
  --brand: #5eead4;
  --brand-strong: #38bdf8;
  --accent: #f59e0b;
  --danger: #ff7a90;
  --danger-bg: rgba(255, 122, 144, 0.12);
  --shadow-strong: 0 32px 80px rgba(2, 6, 23, 0.45);
  --shadow-soft: 0 18px 40px rgba(2, 6, 23, 0.24);
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #edf2f7;
  --bg-elevated: rgba(255, 255, 255, 0.72);
  --bg-panel: rgba(255, 255, 255, 0.9);
  --bg-field: rgba(15, 23, 42, 0.04);
  --bg-field-focus: rgba(15, 23, 42, 0.08);
  --surface-border: rgba(15, 23, 42, 0.12);
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-soft: #334155;
  --brand: #0f766e;
  --brand-strong: #0369a1;
  --accent: #b45309;
  --danger: #b91c1c;
  --danger-bg: rgba(185, 28, 28, 0.08);
  --shadow-strong: 0 32px 80px rgba(15, 23, 42, 0.16);
  --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text-main);
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.22), transparent 28%),
    radial-gradient(circle at bottom right, rgba(245, 158, 11, 0.18), transparent 24%),
    linear-gradient(145deg, var(--bg) 0%, color-mix(in srgb, var(--bg) 80%, #020617 20%) 100%);
  transition: background-color 180ms ease, color 180ms ease;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 30px 30px;
  mask-image: radial-gradient(circle at center, rgba(0, 0, 0, 0.85), transparent 92%);
}

.login-shell {
  position: relative;
  display: grid;
  grid-template-columns: minmax(280px, 1.1fr) minmax(320px, 460px);
  gap: 2rem;
  align-items: center;
  min-height: 100vh;
  max-width: 1180px;
  margin: 0 auto;
  padding: 2rem;
}

.login-hero,
.login-panel {
  position: relative;
  z-index: 1;
}

.login-hero {
  padding: 2rem 1rem 2rem 0;
}

.brand-mark {
  display: inline-flex;
  padding: 1rem 1.1rem;
  border: 1px solid var(--surface-border);
  border-radius: 1.5rem;
  background: var(--bg-elevated);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-soft);
}

.brand-logo {
  display: block;
  width: min(260px, 56vw);
  height: auto;
}

.brand-copy {
  margin-top: 2rem;
  max-width: 34rem;
}

.eyebrow,
.panel-kicker,
.language-badge {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.brand-title {
  margin: 0.7rem 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(3.4rem, 7vw, 6.4rem);
  line-height: 0.92;
  font-weight: 500;
  letter-spacing: -0.04em;
}

.brand-text,
.panel-subtitle {
  margin: 0;
  color: var(--text-soft);
  font-size: 1.02rem;
  line-height: 1.7;
  max-width: 34rem;
}

.login-panel {
  padding: 1.3rem;
  border: 1px solid var(--surface-border);
  border-radius: 1.8rem;
  background: var(--bg-panel);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-strong);
}

.panel-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  padding: 0;
}

.theme-toggle-track {
  display: inline-grid;
  grid-template-columns: auto 1.65rem auto;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--surface-border);
  background: var(--bg-field);
}

.theme-toggle-thumb {
  width: 1.65rem;
  height: 1.65rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-strong) 100%);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.22);
}

.theme-toggle-label {
  font-size: 0.82rem;
  color: var(--text-soft);
}

.panel-header {
  margin-top: 1.8rem;
}

.panel-header h2 {
  margin: 0.65rem 0 0.8rem;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

.language-switcher {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
  margin-top: 1.15rem;
}

.language-option {
  display: grid;
  gap: 0.12rem;
  padding: 0.65rem 0.8rem;
  border: 1px solid var(--surface-border);
  border-radius: 0.9rem;
  background: var(--bg-field);
  color: inherit;
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}

.language-option:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--brand-strong) 28%, transparent 72%);
  background: var(--bg-field-focus);
}

.language-option.is-active {
  border-color: color-mix(in srgb, var(--brand-strong) 54%, transparent 46%);
  background: color-mix(in srgb, var(--brand-strong) 10%, var(--bg-field) 90%);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand-strong) 10%, transparent 90%);
}

.language-option-code {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brand);
}

.language-option-label {
  font-size: 0.78rem;
  color: var(--text-soft);
}

.alert-card {
  display: grid;
  gap: 0.35rem;
  margin-top: 1.2rem;
  padding: 0.85rem 0.95rem;
  border: 1px solid rgba(255, 122, 144, 0.25);
  border-radius: 1rem;
  background: var(--danger-bg);
  color: var(--danger);
}

.login-form {
  display: grid;
  gap: 1.15rem;
  margin-top: 1.35rem;
}

.field {
  display: grid;
  gap: 0.55rem;
}

.field-label {
  font-size: 0.86rem;
  color: var(--text-muted);
}

.field input {
  width: 100%;
  border: 1px solid transparent;
  border-radius: 1rem;
  background: var(--bg-field);
  color: var(--text-main);
  font: inherit;
  padding: 1rem 1.05rem;
  transition: border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.field input::placeholder {
  color: color-mix(in srgb, var(--text-muted) 80%, transparent 20%);
}

.field input:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--brand-strong) 48%, transparent 52%);
  background: var(--bg-field-focus);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand-strong) 12%, transparent 88%);
  transform: translateY(-1px);
}

.password-field {
  position: relative;
}

.password-field input {
  padding-right: 5.2rem;
}

.password-toggle {
  position: absolute;
  top: 50%;
  right: 0.5rem;
  transform: translateY(-50%);
  border: 0;
  border-radius: 0.8rem;
  background: transparent;
  color: var(--brand);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
}

.submit-button {
  border: 0;
  border-radius: 1rem;
  padding: 1rem 1.15rem;
  margin-top: 0.5rem;
  background: linear-gradient(135deg, var(--brand-strong) 0%, var(--brand) 100%);
  color: #03111d;
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 18px 30px rgba(14, 165, 233, 0.24);
  transition: transform 180ms ease, box-shadow 180ms ease, filter 180ms ease;
}

.submit-button:hover {
  transform: translateY(-2px);
  filter: saturate(1.06);
  box-shadow: 0 22px 36px rgba(14, 165, 233, 0.3);
}

.submit-button:focus-visible,
.theme-toggle:focus-visible,
.password-toggle:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--brand-strong) 70%, white 30%);
  outline-offset: 3px;
}

@media (max-width: 960px) {
  .login-shell {
    grid-template-columns: 1fr;
    gap: 1.4rem;
    padding: 1.1rem;
  }

  .login-hero {
    padding: 0.5rem 0 0;
  }

  .brand-copy {
    margin-top: 1.3rem;
  }

  .brand-title {
    font-size: clamp(2.8rem, 12vw, 4.8rem);
  }
}

@media (max-width: 640px) {
  .login-panel {
    padding: 1.15rem;
    border-radius: 1.35rem;
  }

  .panel-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .theme-toggle-track {
    grid-template-columns: auto 1.4rem auto;
  }

  .theme-toggle-thumb {
    width: 1.4rem;
    height: 1.4rem;
  }

  .language-switcher {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}