/* === login.css — Authentication page styles === */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Roboto:wght@300;400;500;700&display=swap');

:root {
  --color-primary:                 #0575E6;
  --color-primary-hover:           #0260c0;
  --color-primary-gradient:        linear-gradient(135deg, #0575E6 0%, #021B79 100%);
  --color-primary-gradient-hover:  linear-gradient(135deg, #0466cc 0%, #011560 100%);
  --color-accent:                  #F97316;
  --color-accent-hover:   #EA6C0A;
  --color-bg:             #F8FAFC;
  --color-surface:        #FFFFFF;
  --color-text-primary:   #1E293B;
  --color-text-secondary: #64748B;
  --color-border:         #E2E8F0;
  --color-success:        #10B981;
  --color-error:          #EF4444;
  --color-error-bg:       #FEF2F2;

  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body:    'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   14px;
  --radius-full: 9999px;

  --shadow-card: 0 1px 3px 0 rgb(0 0 0 / 0.08), 0 1px 2px -1px rgb(0 0 0 / 0.08);
  --shadow-lg:   0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

  --transition-fast:   150ms ease;
  --transition-normal: 250ms ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg:             #0F172A;
    --color-surface:        #1E293B;
    --color-text-primary:   #F1F5F9;
    --color-text-secondary: #94A3B8;
    --color-border:         #334155;
    --color-primary:                #4B9EFF;
    --color-primary-hover:          #2F86F7;
    --color-primary-gradient:       linear-gradient(135deg, #1A82F5 0%, #0D3BAE 100%);
    --color-primary-gradient-hover: linear-gradient(135deg, #0E72E8 0%, #0A2F99 100%);
    --color-error-bg:       #2D1B1B;
    --shadow-card: 0 1px 3px 0 rgb(0 0 0 / 0.3), 0 1px 2px -1px rgb(0 0 0 / 0.3);
  }
}

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

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  background-image:
    radial-gradient(circle at 20% 20%, rgb(37 99 235 / 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgb(249 115 22 / 0.05) 0%, transparent 50%);
}

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

button { font-family: var(--font-body); cursor: pointer; border: none; background: none; }
input  { font-family: var(--font-body); font-size: 0.875rem; }

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ── Auth card ────────────────────────────────────────────── */
.auth-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 420px;
  overflow: hidden;
}

/* ── Card header / branding ──────────────────────────────── */
.auth-header {
  padding: 28px 32px 0;
  text-align: center;
}

.auth-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.auth-logo-icon {
  height: 80px;
  border-radius: var(--radius-md);
  display: block;
  object-fit: contain;
  flex-shrink: 0;
}

.auth-logo-text {
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

/* ── Tab bar ─────────────────────────────────────────────── */
.auth-tabs {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  margin-top: 8px;
}

.auth-tab {
  flex: 1;
  padding: 14px 0;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  position: relative;
  transition: color var(--transition-fast);
}

.auth-tab::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.auth-tab.active {
  color: var(--color-primary);
}

.auth-tab.active::after {
  transform: scaleX(1);
}

.auth-tab:hover:not(.active) {
  color: var(--color-text-primary);
}

/* ── Form panels ─────────────────────────────────────────── */
.auth-panels {
  padding: 28px 32px 32px;
}

.auth-panel {
  display: none;
}

.auth-panel.active {
  display: block;
}

/* ── Form elements ───────────────────────────────────────── */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text-primary);
  font-size: 0.9375rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

.form-input::placeholder {
  color: var(--color-text-secondary);
  opacity: 0.6;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgb(37 99 235 / 0.15);
}

.form-input.error {
  border-color: var(--color-error);
}

.form-input.error:focus {
  box-shadow: 0 0 0 3px rgb(239 68 68 / 0.15);
}

.field-error {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 5px;
  font-size: 0.75rem;
  color: var(--color-error);
}

/* ── Submit button ───────────────────────────────────────── */
.btn-submit {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--color-primary-gradient);
  color: white;
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
  margin-top: 8px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-submit:hover:not(:disabled) {
  background: var(--color-primary-gradient-hover);
  box-shadow: 0 4px 12px rgb(5 117 230 / 0.35);
}

.btn-submit:active:not(:disabled) {
  transform: translateY(1px);
}

.btn-submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

/* ── Alert banner ────────────────────────────────────────── */
.alert {
  display: none;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  line-height: 1.5;
  margin-bottom: 16px;
}

.alert.visible {
  display: flex;
}

.alert-error {
  background: var(--color-error-bg);
  border: 1px solid rgb(239 68 68 / 0.25);
  color: var(--color-error);
}

.alert-success {
  background: #ECFDF5;
  border: 1px solid rgb(16 185 129 / 0.25);
  color: #065F46;
}

@media (prefers-color-scheme: dark) {
  .alert-success {
    background: #064E3B;
    color: #6EE7B7;
  }
}

.alert-icon {
  flex-shrink: 0;
  margin-top: 1px;
}

/* ── Divider hint ────────────────────────────────────────── */
.form-hint {
  margin-top: 16px;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.form-hint a {
  font-weight: 500;
}

/* ── Spinner ─────────────────────────────────────────────── */
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255 255 255 / 0.4);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  flex-shrink: 0;
}

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

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 480px) {
  body { padding: 16px 12px; align-items: flex-start; padding-top: 40px; }
  .auth-panels { padding: 24px 20px 28px; }
  .auth-header { padding: 24px 20px 0; }
}

@media (prefers-reduced-motion: reduce) {
  .spinner { animation: none; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
  }
}