/* ====== CSS Variables ====== */
:root {
  --bg-primary: #0c0c0c;
  --bg-card: #141414;
  --bg-card-hover: #1a1a1a;
  --bg-input: #1a1a1a;
  --bg-input-focus: #1f1f1f;
  --border-color: #2a2a2a;
  --border-focus: #4a4a4a;
  --text-primary: #e8e8e8;
  --text-secondary: #888;
  --text-muted: #555;
  --accent: #c8a46e;
  --accent-hover: #d4b47e;
  --accent-glow: rgba(200, 164, 110, 0.15);
  --error: #e85d5d;
  --error-bg: rgba(232, 93, 93, 0.08);
  --error-border: rgba(232, 93, 93, 0.2);
  --locked: #e8a33d;
  --locked-bg: rgba(232, 163, 61, 0.08);
  --locked-border: rgba(232, 163, 61, 0.2);
  --success: #5de88a;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-serif: 'Noto Serif SC', 'Georgia', serif;
  --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow: hidden;
}

/* ====== Page Layout ====== */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 20px;
}

/* ====== Background ====== */
.auth-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.auth-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(200, 164, 110, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 164, 110, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.auth-bg-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.4;
}

.auth-bg-glow--1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(200, 164, 110, 0.12), transparent 70%);
  top: -10%;
  right: -5%;
  animation: glowDrift1 20s ease-in-out infinite;
}

.auth-bg-glow--2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(200, 164, 110, 0.08), transparent 70%);
  bottom: -10%;
  left: -5%;
  animation: glowDrift2 25s ease-in-out infinite;
}

@keyframes glowDrift1 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-40px, 30px); }
}

@keyframes glowDrift2 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -40px); }
}

/* ====== Card ====== */
.auth-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 400px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 32px 32px;
  animation: cardEnter 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  opacity: 0;
  transform: translateY(12px);
}

@keyframes cardEnter {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ====== Brand ====== */
.auth-brand {
  text-align: center;
  margin-bottom: 32px;
}

.auth-logo {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  color: var(--accent);
  animation: logoFloat 4s ease-in-out infinite;
}

.auth-logo svg {
  width: 100%;
  height: 100%;
}

@keyframes logoFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.auth-title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.auth-subtitle {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 300;
}

/* ====== Messages ====== */
.auth-message {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-size: 0.85rem;
  color: var(--error);
  animation: messageIn 0.3s ease;
}

.auth-message--locked {
  background: var(--locked-bg);
  border-color: var(--locked-border);
  color: var(--locked);
}

.auth-message-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

@keyframes messageIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.auth-attempt-warning {
  font-size: 0.8rem;
  color: var(--locked);
  margin-bottom: 12px;
  padding-left: 2px;
}

.auth-lock-timer {
  font-size: 0.85rem;
  color: var(--locked);
  margin-bottom: 12px;
  text-align: center;
  font-weight: 500;
}

/* ====== Form ====== */
.auth-form {
  animation: formIn 0.4s ease;
}

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

.auth-field {
  margin-bottom: 18px;
}

.auth-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}

.auth-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.auth-input-icon {
  position: absolute;
  left: 12px;
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  pointer-events: none;
  transition: color var(--transition);
}

.auth-input {
  width: 100%;
  height: 44px;
  padding: 0 12px 0 40px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: var(--font-sans);
  transition: all var(--transition);
  outline: none;
}

.auth-input::placeholder {
  color: var(--text-muted);
  font-weight: 300;
}

.auth-input:focus {
  background: var(--bg-input-focus);
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.auth-input:focus ~ .auth-input-icon,
.auth-input:focus + .auth-input-icon {
  color: var(--accent);
}

.auth-input--code {
  letter-spacing: 0.3em;
  font-size: 1.1rem;
  font-weight: 500;
  text-align: center;
  padding-left: 40px;
}

/* Password Toggle */
.auth-pw-toggle {
  position: absolute;
  right: 8px;
  background: none;
  border: none;
  padding: 6px;
  cursor: pointer;
  color: var(--text-muted);
  transition: color var(--transition);
  display: flex;
  align-items: center;
}

.auth-pw-toggle:hover {
  color: var(--text-secondary);
}

.auth-pw-toggle svg {
  width: 18px;
  height: 18px;
}

/* ====== Options ====== */
.auth-options {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}

.auth-remember {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

.auth-remember input[type="checkbox"] {
  display: none;
}

.auth-remember-check {
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--border-color);
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}

.auth-remember input:checked + .auth-remember-check {
  background: var(--accent);
  border-color: var(--accent);
}

.auth-remember input:checked + .auth-remember-check::after {
  content: '';
  width: 8px;
  height: 5px;
  border-left: 2px solid var(--bg-primary);
  border-bottom: 2px solid var(--bg-primary);
  transform: rotate(-45deg) translateY(-1px);
}

/* ====== Button ====== */
.auth-btn {
  width: 100%;
  height: 44px;
  background: var(--accent);
  color: var(--bg-primary);
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  position: relative;
  overflow: hidden;
}

.auth-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(255,255,255,0.1) 50%, transparent 60%);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.auth-btn:hover::before {
  transform: translateX(100%);
}

.auth-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(200, 164, 110, 0.25);
}

.auth-btn:active {
  transform: translateY(0);
}

.auth-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.auth-btn-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(12, 12, 12, 0.3);
  border-top-color: var(--bg-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ====== 2FA ====== */
.auth-twofa-header {
  text-align: center;
  margin-bottom: 24px;
}

.auth-twofa-icon {
  width: 36px;
  height: 36px;
  color: var(--accent);
  margin-bottom: 12px;
}

.auth-twofa-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.auth-twofa-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.auth-twofa-methods {
  display: flex;
  gap: 10px;
  margin-bottom: 18px;
}

.auth-twofa-method {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition);
}

.auth-twofa-method:hover {
  border-color: var(--border-focus);
  color: var(--text-primary);
}

.auth-twofa-method.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

.auth-twofa-method svg {
  width: 16px;
  height: 16px;
}

.auth-twofa-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.auth-twofa-resend {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  color: var(--accent);
  font-size: 0.8rem;
  font-family: var(--font-sans);
  cursor: pointer;
  padding: 4px 0;
  transition: color var(--transition);
}

.auth-twofa-resend:hover {
  color: var(--accent-hover);
}

.auth-twofa-resend:disabled {
  color: var(--text-muted);
  cursor: not-allowed;
}

.auth-twofa-resend svg {
  width: 14px;
  height: 14px;
}

.auth-twofa-back {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-family: var(--font-sans);
  cursor: pointer;
  padding: 4px 0;
  transition: color var(--transition);
}

.auth-twofa-back:hover {
  color: var(--text-primary);
}

.auth-twofa-back svg {
  width: 14px;
  height: 14px;
}

/* ====== Footer ====== */
.auth-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 28px;
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.auth-footer-dot {
  width: 3px;
  height: 3px;
  background: var(--text-muted);
  border-radius: 50%;
}

/* ====== Responsive ====== */
@media (max-width: 480px) {
  .auth-card {
    padding: 28px 20px 24px;
    border-radius: var(--radius-md);
  }

  .auth-title {
    font-size: 1.5rem;
  }
}