/* =========================================
   Auth UI — login button, avatar menu, modal
   Issue #80 — Phase 2 (User accounts).
   Uses design tokens from base.css (do not hardcode colors).
   Class prefix `authdet-` would normally be safer for AdBlock, but we don't
   use ad-related words here so `auth-` is fine.
   ========================================= */

/* ---- Header slot ------------------------------------------------- */
#auth-slot {
  display: flex;
  align-items: center;
  margin-left: 0.75rem;
}

.auth-login-btn {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font: 500 0.9rem var(--font-sans);
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--t-fast) var(--ease-out),
              border-color var(--t-fast) var(--ease-out);
}
.auth-login-btn:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.65);
}
.auth-login-btn:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.auth-avatar-btn {
  appearance: none;
  background: transparent;
  border: 0;
  padding: 0;
  cursor: pointer;
  border-radius: var(--radius-full);
  transition: transform var(--t-fast) var(--ease-out);
}
.auth-avatar-btn:hover { transform: translateY(-1px); }
.auth-avatar-btn:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
}

.auth-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #fff 0%, var(--primary-light) 100%);
  color: var(--primary-darker);
  font: 700 0.82rem/1 var(--font-sans);
  letter-spacing: 0.02em;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.55), inset 0 0 0 1px rgba(0, 0, 0, 0.04);
  user-select: none;
}

/* ---- Dropdown menu ----------------------------------------------- */
.auth-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 240px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.4rem;
  z-index: 1000;
  animation: authMenuIn var(--t-base) var(--ease-out);
  transform-origin: top right;
}
@keyframes authMenuIn {
  from { opacity: 0; transform: translateY(-6px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0)    scale(1); }
}
/* Anchor the menu off the avatar button (which lives inside #auth-slot,
   itself flex inside the navbar). */
#auth-slot { position: relative; }

.auth-menu-header {
  padding: 0.7rem 0.85rem 0.55rem;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 0.3rem;
}
.auth-menu-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.auth-menu-email {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 1px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.auth-menu-role {
  display: inline-block;
  margin-top: 0.45rem;
  padding: 1px 0.55rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--primary-50);
  color: var(--primary-darker);
  border-radius: var(--radius-full);
}

.auth-menu-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  padding: 0.55rem 0.8rem;
  font: 500 0.9rem/1.2 var(--font-sans);
  color: var(--text);
  text-align: left;
  text-decoration: none;
  background: transparent;
  border: 0;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--t-fast) var(--ease-out),
              color    var(--t-fast) var(--ease-out);
}
.auth-menu-item:hover { background: var(--primary-50); color: var(--primary-dark); }
.auth-menu-item:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: -2px;
}
.auth-menu-icon { font-size: 1rem; line-height: 1; opacity: 0.85; }

.auth-menu-sep {
  height: 1px;
  background: var(--border-light);
  margin: 0.3rem 0.5rem;
}

.auth-menu-signout { color: var(--orange); }
.auth-menu-signout:hover { background: var(--orange-light); color: var(--orange); }

/* ---- Login modal ------------------------------------------------- */
.auth-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  transition: opacity var(--t-base) var(--ease-out);
  padding: 1rem;
}
.auth-modal-backdrop.open { opacity: 1; }

.auth-modal-dialog {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px -10px rgba(15, 23, 42, 0.35),
              0 0 0 1px rgba(15, 23, 42, 0.06);
  padding: 2rem 1.75rem 1.6rem;
  transform: translateY(12px) scale(0.97);
  transition: transform var(--t-slow) var(--ease-spring);
}
.auth-modal-backdrop.open .auth-modal-dialog {
  transform: translateY(0) scale(1);
}

.auth-modal-close {
  position: absolute;
  top: 0.6rem;
  right: 0.7rem;
  appearance: none;
  background: transparent;
  border: 0;
  font: 400 1.6rem/1 var(--font-sans);
  color: var(--text-muted);
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  transition: background var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out);
}
.auth-modal-close:hover { background: var(--border-light); color: var(--text); }

.auth-modal-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.35rem;
  letter-spacing: -0.01em;
}
.auth-modal-sub {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 1.4rem;
}

.auth-modal-form { display: flex; flex-direction: column; gap: 0.55rem; }
.auth-modal-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.auth-modal-input {
  appearance: none;
  width: 100%;
  padding: 0.7rem 0.85rem;
  font: 400 0.95rem var(--font-sans);
  color: var(--text);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color var(--t-fast) var(--ease-out),
              background   var(--t-fast) var(--ease-out),
              box-shadow   var(--t-fast) var(--ease-out);
}
.auth-modal-input:focus {
  outline: none;
  background: var(--surface);
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18);
}
.auth-modal-input::placeholder { color: var(--text-muted); }

.auth-modal-submit {
  appearance: none;
  margin-top: 0.4rem;
  padding: 0.75rem 1rem;
  font: 600 0.95rem var(--font-sans);
  color: #fff;
  background: var(--primary);
  border: 0;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--t-fast) var(--ease-out),
              transform   var(--t-fast) var(--ease-out);
}
.auth-modal-submit:hover:not(:disabled) {
  background: var(--primary-hover);
  transform: translateY(-1px);
}
.auth-modal-submit:active:not(:disabled) { transform: translateY(0); }
.auth-modal-submit:disabled {
  opacity: 0.6;
  cursor: progress;
}

.auth-modal-divider {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 1.1rem 0;
}
.auth-modal-divider::before,
.auth-modal-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.auth-modal-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  width: 100%;
  padding: 0.7rem 1rem;
  font: 600 0.95rem var(--font-sans);
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--t-fast) var(--ease-out),
              border-color var(--t-fast) var(--ease-out),
              box-shadow var(--t-fast) var(--ease-out);
}
.auth-modal-google:hover {
  background: var(--bg-elevated);
  border-color: #cbd5e1;
  box-shadow: var(--shadow-xs);
}
.auth-modal-google-icon { display: inline-flex; line-height: 0; }

.auth-modal-status {
  margin-top: 0.9rem;
  font-size: 0.88rem;
  min-height: 1.2em;
  color: var(--text-muted);
}
.auth-modal-status.success { color: var(--success); font-weight: 500; }
.auth-modal-status.error   { color: var(--orange);  font-weight: 500; }

.auth-modal-fineprint {
  margin-top: 1rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
}
.auth-modal-fineprint a { color: var(--primary); }

/* ---- Mobile ------------------------------------------------------ */
@media (max-width: 768px) {
  #auth-slot { margin-left: 0.4rem; }
  .auth-login-btn { padding: 0.4rem 0.85rem; font-size: 0.85rem; }
  .auth-avatar { width: 32px; height: 32px; font-size: 0.78rem; }
  .auth-modal-dialog {
    padding: 1.6rem 1.25rem 1.25rem;
    border-radius: var(--radius-md);
  }
  .auth-modal-title { font-size: 1.2rem; }
  .auth-menu {
    right: 0;
    min-width: 220px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .auth-modal-backdrop,
  .auth-modal-dialog,
  .auth-menu,
  .auth-avatar-btn,
  .auth-login-btn,
  .auth-modal-submit,
  .auth-modal-google,
  .auth-modal-input,
  .auth-modal-close,
  .auth-menu-item {
    transition: none !important;
    animation: none !important;
  }
}