/* ── Page Layout ────────────────────────────────────────────────────────── */
body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  overflow: hidden;
}

/* ── Animated Background ────────────────────────────────────────────────── */
.bg-canvas {
  position: fixed;
  inset: 0;
  overflow: hidden;
  z-index: 0;
  background: var(--bg-1);
  transition: background var(--transition);
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  transition: opacity 0.6s;
}
.orb-1 {
  width: 520px; height: 520px;
  background: radial-gradient(circle at 40% 40%, #7c3aed, #4f46e5 60%, transparent);
  top: -160px; left: -120px;
  opacity: 0.28;
  animation: float 8s ease-in-out infinite;
}
.orb-2 {
  width: 440px; height: 440px;
  background: radial-gradient(circle at 60% 60%, #ec4899, #8b5cf6 60%, transparent);
  bottom: -100px; right: -100px;
  opacity: 0.24;
  animation: float 10s ease-in-out infinite reverse;
}
.orb-3 {
  width: 320px; height: 320px;
  background: radial-gradient(circle at 50% 50%, #06b6d4, #7c3aed 60%, transparent);
  top: 40%; left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.15;
  animation: float2 12s ease-in-out infinite;
}

[data-theme="light"] .orb-1 { opacity: 0.18; }
[data-theme="light"] .orb-2 { opacity: 0.16; }
[data-theme="light"] .orb-3 { opacity: 0.10; }

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--surface-b) 1px, transparent 1px),
    linear-gradient(90deg, var(--surface-b) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.4;
}

/* ── Login Container ────────────────────────────────────────────────────── */
.login-container {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 420px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  animation: slideUp 0.6s ease both;
}

/* ── Logo ───────────────────────────────────────────────────────────────── */
.logo {
  display: flex;
  align-items: center;
  gap: 16px;
  justify-content: center;
}

.logo-bird {
  position: relative;
  width: 64px;
  height: 64px;
  animation: float2 3s ease-in-out infinite;
}

/* CSS Bird */
.bird-body {
  position: absolute;
  width: 52px; height: 52px;
  border-radius: 50% 50% 50% 40%;
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  top: 6px; left: 6px;
  box-shadow: 0 0 24px rgba(251,191,36,0.5);
}
[data-theme="dark"] .bird-body {
  background: linear-gradient(135deg, #60a5fa, #3b82f6);
  box-shadow: 0 0 24px rgba(96,165,250,0.6);
}
.bird-wing {
  position: absolute;
  width: 30px; height: 18px;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  border-radius: 50% 50% 0 50%;
  top: 18px; left: 0;
  transform-origin: right center;
  animation: wingFlap 0.4s ease-in-out infinite alternate;
}
[data-theme="dark"] .bird-wing {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
}
@keyframes wingFlap {
  from { transform: rotate(-20deg); }
  to   { transform: rotate(20deg); }
}
.bird-eye {
  position: absolute;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #fff;
  top: 14px; right: 10px;
}
.bird-eye::after {
  content: '';
  position: absolute;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #1e293b;
  top: 4px; left: 4px;
}
.bird-beak {
  position: absolute;
  width: 0; height: 0;
  border-top: 7px solid transparent;
  border-bottom: 7px solid transparent;
  border-left: 14px solid #ef4444;
  top: 24px; right: -4px;
}

.logo-text h1 {
  font-size: 32px;
  font-weight: 900;
  letter-spacing: -1px;
  color: var(--text-1);
  line-height: 1;
}
.logo-text h1 span {
  color: var(--accent);
}
.logo-text p {
  font-size: 12px;
  color: var(--text-3);
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-top: 2px;
}

/* ── Auth Card ──────────────────────────────────────────────────────────── */
.auth-card {
  background: var(--surface);
  border: 1px solid var(--surface-b);
  border-radius: 24px;
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: background var(--transition), border-color var(--transition);
}

/* ── Tabs ───────────────────────────────────────────────────────────────── */
.auth-tabs {
  display: flex;
  background: var(--input-bg);
  border: 1px solid var(--input-b);
  border-radius: var(--radius-sm);
  padding: 4px;
  margin-bottom: 24px;
  gap: 4px;
}

.tab-btn {
  flex: 1;
  padding: 9px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-3);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  outline: none;
}
.tab-btn.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 16px var(--accent-glow);
}
.tab-btn:not(.active):hover {
  color: var(--text-1);
  background: var(--surface-b);
}

/* ── Form ───────────────────────────────────────────────────────────────── */
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  padding-left: 2px;
}

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

.input-icon {
  position: absolute;
  left: 14px;
  font-size: 16px;
  pointer-events: none;
  z-index: 1;
  line-height: 1;
}

.input-wrapper input {
  width: 100%;
  padding: 12px 44px 12px 44px;
  background: var(--input-bg);
  border: 1.5px solid var(--input-b);
  border-radius: var(--radius-sm);
  color: var(--text-1);
  font-family: var(--font);
  font-size: 14px;
  outline: none;
  transition: all var(--transition);
}
.input-wrapper input::placeholder { color: var(--text-3); }
.input-wrapper input:focus {
  border-color: var(--accent);
  background: var(--bg-1);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.toggle-password {
  position: absolute;
  right: 12px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  color: var(--text-3);
  padding: 4px;
  transition: color var(--transition);
  line-height: 1;
}
.toggle-password:hover { color: var(--text-1); }

/* ── Password Strength ──────────────────────────────────────────────────── */
.password-strength {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
}
.strength-bar {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: var(--input-b);
  overflow: hidden;
  position: relative;
}
.strength-bar::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 2px;
  width: var(--strength, 0%);
  transition: width 0.4s, background 0.4s;
  background: var(--strength-color, #ef4444);
}
.strength-text {
  font-size: 11px;
  font-weight: 600;
  color: var(--strength-color, var(--text-3));
  min-width: 40px;
}

/* ── Form Options ───────────────────────────────────────────────────────── */
.form-options {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 9px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text-2);
  font-weight: 500;
  user-select: none;
}
.checkbox-label input { display: none; }
.checkbox-custom {
  width: 18px; height: 18px;
  border-radius: 5px;
  border: 1.5px solid var(--input-b);
  background: var(--input-bg);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
}
.checkbox-label input:checked + .checkbox-custom {
  background: var(--accent);
  border-color: var(--accent);
}
.checkbox-label input:checked + .checkbox-custom::after {
  content: '✓';
  color: #fff;
  font-size: 11px;
  font-weight: 700;
}

.forgot-link {
  font-size: 12px;
  color: var(--accent-light);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
}
.forgot-link:hover { color: var(--accent2); }

/* ── Error ──────────────────────────────────────────────────────────────── */
.error-msg {
  font-size: 13px;
  color: #ef4444;
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.25);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-weight: 500;
  display: none;
}
.error-msg.visible {
  display: block;
  animation: shake 0.4s ease;
}

/* ── Buttons ────────────────────────────────────────────────────────────── */
.submit-btn {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-family: var(--font);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-bounce);
  box-shadow: 0 8px 24px var(--accent-glow);
  outline: none;
}
.submit-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.submit-btn:hover::before { opacity: 1; }
.submit-btn:hover { transform: translateY(-2px); box-shadow: 0 12px 32px var(--accent-glow); }
.submit-btn:active { transform: translateY(0); }

.btn-loader {
  width: 18px; height: 18px;
  border: 2.5px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-3);
  font-size: 12px;
  font-weight: 500;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--surface-b);
}

.guest-btn {
  width: 100%;
  padding: 13px;
  background: transparent;
  border: 1.5px solid var(--surface-b);
  border-radius: var(--radius-sm);
  color: var(--text-2);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  outline: none;
}
.guest-btn:hover {
  border-color: var(--accent);
  color: var(--accent-light);
  background: var(--input-bg);
}

/* ── Stats Bar ──────────────────────────────────────────────────────────── */
.stats-bar {
  background: var(--surface);
  border: 1px solid var(--surface-b);
  border-radius: var(--radius);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  box-shadow: var(--shadow);
  animation: slideUp 0.6s 0.1s ease both;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  flex: 1;
}
.stat-icon { font-size: 20px; }
.stat-label {
  font-size: 10px;
  color: var(--text-3);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.stat-value {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-1);
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--surface-b);
}