/* ============================================
   ALIWORLD — auth screens
   moody, mobile-first, no frameworks
   ============================================ */

:root {
  --ink: #0a0a0a;
  --ink-soft: #14110f;
  --ink-card: #1a1614;
  --cream: #ebe2d2;
  --cream-dim: #8c8478;
  --cream-faint: #5a544a;
  --red: #b32a1f;
  --red-dim: #6a1612;
  --red-glow: rgba(179, 42, 31, 0.15);
  --border: rgba(235, 226, 210, 0.12);
  --border-focus: rgba(179, 42, 31, 0.5);
  --success: #4a7a3a;
  --error: #b32a1f;
}

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

html, body {
  min-height: 100vh;
  background: var(--ink);
  color: var(--cream);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  min-height: 100vh;
  min-height: 100dvh;
}

main {
  width: 100%;
  max-width: 420px;
  position: relative;
}

/* ============ SCREENS ============ */
.screen {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1rem;
  animation: fadeIn 0.3s ease;
}

.screen.visible {
  display: flex;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ SIGIL ============ */
.sigil {
  width: 56px;
  height: 56px;
  color: var(--red);
  margin-bottom: 0.5rem;
}
.sigil svg { width: 100%; height: 100%; }

/* ============ TYPE ============ */
h1 {
  font-size: 1.75rem;
  letter-spacing: 0.1em;
  color: var(--red);
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.tagline {
  font-size: 0.9375rem;
  color: var(--cream-dim);
  font-style: italic;
  margin-bottom: 1.5rem;
}

.loading-text {
  color: var(--cream-dim);
  font-style: italic;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
}

/* ============ MODE TABS ============ */
.mode-tabs {
  display: flex;
  gap: 0.5rem;
  background: var(--ink-soft);
  padding: 0.25rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  margin-bottom: 0.5rem;
  width: 100%;
}

.mode-tab {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--cream-faint);
  font-family: inherit;
  font-size: 0.875rem;
  letter-spacing: 0.03em;
  padding: 0.625rem 1rem;
  cursor: pointer;
  border-radius: 3px;
  transition: all 0.15s ease;
}

.mode-tab.active {
  background: var(--ink-card);
  color: var(--cream);
}

.mode-tab:hover:not(.active) {
  color: var(--cream-dim);
}

/* ============ FORM ============ */
form {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  text-align: left;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

label > span {
  font-size: 0.8125rem;
  color: var(--cream-dim);
  letter-spacing: 0.05em;
  text-transform: lowercase;
}

input[type="email"],
input[type="password"],
input[type="text"] {
  background: var(--ink-soft);
  border: 1px solid var(--border);
  color: var(--cream);
  font-family: inherit;
  font-size: 1rem;
  padding: 0.875rem 1rem;
  border-radius: 4px;
  transition: border-color 0.15s ease, background-color 0.15s ease;
  width: 100%;
}

input:focus {
  outline: none;
  border-color: var(--border-focus);
  background: var(--ink-card);
}

input::placeholder {
  color: var(--cream-faint);
}

button[type="submit"] {
  background: var(--red);
  color: var(--cream);
  border: none;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 0.875rem 1rem;
  border-radius: 4px;
  cursor: pointer;
  margin-top: 0.5rem;
  transition: background 0.15s ease, transform 0.05s ease;
}

button[type="submit"]:hover {
  background: var(--red-dim);
}

button[type="submit"]:active {
  transform: scale(0.99);
}

button[type="submit"]:disabled {
  background: var(--cream-faint);
  cursor: not-allowed;
}

/* ============ MESSAGE ============ */
.message {
  min-height: 1.5rem;
  font-size: 0.875rem;
  color: var(--cream-dim);
  font-style: italic;
  margin-top: 0.5rem;
}

.message.success { color: var(--cream); font-style: normal; }
.message.error { color: var(--error); font-style: normal; }

/* ============ HOME SCREEN ============ */
.user-info {
  font-size: 1.125rem;
  color: var(--cream);
  font-weight: 500;
}

.user-info-dim {
  font-size: 0.875rem;
  color: var(--cream-dim);
  margin-top: -0.5rem;
}

.home-actions {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  width: 100%;
}

.status-line {
  color: var(--cream-faint);
  font-style: italic;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
}

.ghost-btn {
  background: transparent;
  color: var(--cream-dim);
  border: 1px solid var(--border);
  font-family: inherit;
  font-size: 0.875rem;
  padding: 0.625rem 1.5rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.ghost-btn:hover {
  color: var(--cream);
  border-color: var(--cream-dim);
}

/* ============ BACK LINK ============ */
#back-link {
  display: none;
  position: fixed;
  top: 1.25rem;
  left: 1.25rem;
  color: var(--cream-dim);
  text-decoration: none;
  font-size: 0.875rem;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  transition: color 0.15s ease;
}

#back-link.visible {
  display: inline-block;
}

#back-link:hover {
  color: var(--cream);
}

/* ============ MOBILE TUNING ============ */
@media (max-width: 480px) {
  body { padding: 1.5rem 1rem; }
  main { max-width: 100%; }
  h1 { font-size: 1.5rem; }
  .tagline { font-size: 0.875rem; }
  input { font-size: 16px; } /* iOS won't zoom on focus if 16px or larger */
}

/* ============ REDUCED MOTION ============ */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}