/* ========================================
   LOADING SCREEN
   Shows during initial session check
   ======================================== */

#loading-screen {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-darkest);
  z-index: calc(var(--z-modal) + 10);
}

#loading-screen.hidden {
  display: none;
}

.loading-content {
  text-align: center;
}

.loading-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-accent-gold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin: 0 0 var(--space-xl) 0;
}

.loading-spinner {
  width: calc(var(--vw) * 3);
  height: calc(var(--vw) * 3);
  margin: 0 auto;
  border: calc(var(--vw) * 0.2) solid var(--color-border);
  border-top-color: var(--color-accent-gold);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* ========================================
   AUTH SCREEN
   ======================================== */

#auth-screen {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(
      ellipse at center,
      var(--color-bg-darkest) 0%,
      rgba(15, 12, 10, 1) 100%
    );
  z-index: var(--z-modal);
}

#auth-screen.hidden {
  display: none;
}

/* ========================================
   AUTH CARD
   ======================================== */

.auth-card {
  width: calc(var(--vw) * 28);
  padding: var(--space-2xl);
  background: var(--panel-bg-solid);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

/* ========================================
   AUTH HEADER
   ======================================== */

.auth-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.auth-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text-primary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin: 0 0 var(--space-xs) 0;
}

.auth-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-style: italic;
  color: var(--color-text-secondary);
  margin: 0;
}

/* ========================================
   AUTH ERROR
   ======================================== */

.auth-error {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
  background: rgba(124, 58, 237, 0.15);
  border: var(--border-width) solid var(--color-danger);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: var(--text-sm);
}

.auth-error::before {
  content: '\26A0';
  font-size: var(--text-md);
}

.auth-error.hidden {
  display: none;
}

/* ========================================
   AUTH FORM
   ======================================== */

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

/* ========================================
   FORM GROUP
   ======================================== */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-group.confirm-password {
  display: none;
}

.auth-form.register-mode .form-group.confirm-password {
  display: flex;
}

/* ========================================
   FORM LABEL
   ======================================== */

.form-label {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

/* ========================================
   FORM INPUT
   ======================================== */

.form-input {
  width: 100%;
  padding: var(--space-md);
  font-family: var(--font-body);
  font-size: var(--text-md);
  color: var(--color-text-primary);
  background: var(--color-bg-darkest);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition-fast);
  box-sizing: border-box;
}

.form-input::placeholder {
  color: var(--color-text-tertiary);
  font-style: italic;
}

.form-input:focus {
  border-color: var(--color-accent-gold);
}

.form-input:-webkit-autofill,
.form-input:-webkit-autofill:hover,
.form-input:-webkit-autofill:focus {
  -webkit-text-fill-color: var(--color-text-primary);
  -webkit-box-shadow: 0 0 0 1000vw var(--color-bg-darkest) inset;
  transition: background-color 5000s ease-in-out 0s;
}

/* ========================================
   AUTH BUTTON
   ======================================== */

.auth-button {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 700;
  color: var(--color-bg-darkest);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  background: var(--color-accent-gold);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition:
    filter var(--transition-fast),
    transform var(--transition-fast);
  position: relative;
}

.auth-button:hover {
  filter: brightness(1.1);
}

.auth-button:active {
  transform: scale(0.98);
}

.auth-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ========================================
   LOADING STATE
   ======================================== */

.auth-form.loading .auth-button {
  color: transparent;
  pointer-events: none;
}

.auth-form.loading .auth-button::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: var(--text-lg);
  height: var(--text-lg);
  margin-top: calc(var(--text-lg) / -2);
  margin-left: calc(var(--text-lg) / -2);
  border: calc(var(--vw) * 0.15) solid var(--color-bg-darkest);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ========================================
   AUTH TOGGLE
   ======================================== */

.auth-toggle {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: var(--border-width) solid var(--color-border);
  text-align: center;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.auth-toggle-link {
  color: var(--color-accent-gold);
  text-decoration: none;
  cursor: pointer;
  transition: text-decoration var(--transition-fast);
}

.auth-toggle-link:hover {
  text-decoration: underline;
}