/* ============================================================
   Login Page — ae3d-viewer-online
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

:root {
  --bg:           #0f1117;
  --surface:      #181c27;
  --surface-2:    #1e2333;
  --border:       #2a3044;
  --accent:       #4ade80;
  --accent-hover: #22c55e;
  --danger:       #f87171;
  --text:         #e2e8f0;
  --text-muted:   #7e8a9e;
  --radius:       10px;
  --transition:   0.2s ease;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* ── Layout ──────────────────────────────────────────────── */

.login-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  gap: 28px;
}

/* ── Brand ───────────────────────────────────────────────── */

.login-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
}

.brand-logo {
  height: 52px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 0 12px rgba(74, 222, 128, 0.2));
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.4px;
  color: #fff;
}

.brand-tagline {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

/* ── Card ────────────────────────────────────────────────── */

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.login-card-inner {
  padding: 36px 32px 28px;
}

.login-title {
  font-size: 20px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 6px;
}

.login-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

/* ── Alert ───────────────────────────────────────────────── */

.alert {
  padding: 11px 14px;
  border-radius: 8px;
  font-size: 13.5px;
  margin-bottom: 20px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  white-space: pre-line;
  line-height: 1.6;
}

.alert-error {
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.35);
  color: #fca5a5;
}

/* ── Form ────────────────────────────────────────────────── */

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 6px;
  letter-spacing: 0.2px;
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14.5px;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-input::placeholder { color: #3d4a5e; }

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.15);
}

.form-input.invalid {
  border-color: var(--danger);
  box-shadow: 0 0 0 2px rgba(248, 113, 113, 0.15);
}

/* Password toggle wrapper */
.password-wrapper {
  position: relative;
}

.password-wrapper .form-input {
  padding-right: 44px;
}

.password-toggle {
  position: absolute;
  top: 50%;
  right: 12px;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px;
  line-height: 0;
  transition: color var(--transition);
}

.password-toggle:hover { color: var(--text); }

.password-toggle svg {
  width: 18px;
  height: 18px;
  display: block;
}

/* ── Submit button ───────────────────────────────────────── */

.btn-submit {
  width: 100%;
  padding: 11px 24px;
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  color: #0a1a0f;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  margin-top: 22px;
  position: relative;
}

.btn-submit:hover:not(:disabled) {
  background: var(--accent-hover);
  box-shadow: 0 4px 16px rgba(74, 222, 128, 0.3);
  transform: translateY(-1px);
}

.btn-submit:active:not(:disabled) { transform: translateY(0); }

.btn-submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

/* Spinner inside button */
.btn-submit .spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(0,0,0,0.25);
  border-top-color: #0a1a0f;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

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

/* ── Footer note ─────────────────────────────────────────── */

.login-footer-note {
  font-size: 11.5px;
  color: var(--text-muted);
  text-align: center;
  margin-top: 18px;
  opacity: 0.7;
}

/* ── Responsive ──────────────────────────────────────────── */

@media (max-width: 440px) {
  .login-card-inner { padding: 28px 20px 22px; }
  .brand-logo       { height: 40px; }
}