/* ═══════════════════════════════════════════════════════════════════════════
   AudioBook Player – Login Page Styles
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── Background ──────────────────────────────────────────────────────────── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
}

/* Animated gradient orbs */
.login-page::before,
.login-page::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: float 8s ease-in-out infinite;
}

.login-page::before {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(232, 168, 56, 0.3), transparent 70%);
  top: -100px;
  right: -100px;
  animation-delay: 0s;
}

.login-page::after {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(192, 132, 252, 0.2), transparent 70%);
  bottom: -150px;
  left: -150px;
  animation-delay: -4s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -30px) scale(1.05); }
  50% { transform: translate(-20px, 20px) scale(0.95); }
  75% { transform: translate(20px, 10px) scale(1.02); }
}

/* Floating particles */
.particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat linear infinite;
}

.particle:nth-child(1) { left: 10%; animation-duration: 12s; animation-delay: 0s; }
.particle:nth-child(2) { left: 25%; animation-duration: 15s; animation-delay: -3s; }
.particle:nth-child(3) { left: 40%; animation-duration: 10s; animation-delay: -6s; }
.particle:nth-child(4) { left: 55%; animation-duration: 14s; animation-delay: -2s; }
.particle:nth-child(5) { left: 70%; animation-duration: 11s; animation-delay: -5s; }
.particle:nth-child(6) { left: 85%; animation-duration: 13s; animation-delay: -8s; }
.particle:nth-child(7) { left: 15%; animation-duration: 16s; animation-delay: -1s; }
.particle:nth-child(8) { left: 60%; animation-duration: 9s;  animation-delay: -4s; }

@keyframes particleFloat {
  0% { transform: translateY(100vh); opacity: 0; }
  10% { opacity: 0.6; }
  90% { opacity: 0.6; }
  100% { transform: translateY(-20vh); opacity: 0; }
}

/* ─── Login Card ──────────────────────────────────────────────────────────── */
.login-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  margin: var(--space-lg);
  padding: var(--space-2xl) var(--space-xl);
  background: var(--bg-glass);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  animation: fadeInUp 0.6s ease forwards;
  transition: border-color var(--transition-base);
}

.login-card:hover {
  border-color: var(--border-hover);
}

/* ─── Logo / Title ────────────────────────────────────────────────────────── */
.login-logo {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.login-logo-icon {
  font-size: 3.5rem;
  display: block;
  margin-bottom: var(--space-md);
  animation: breathe 3s ease-in-out infinite;
  filter: drop-shadow(0 4px 12px rgba(232, 168, 56, 0.3));
}

.login-logo h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.login-logo p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: var(--space-xs);
}

/* ─── Form ────────────────────────────────────────────────────────────────── */
.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.input-group {
  position: relative;
}

.input-group input {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  padding-left: 48px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  transition: all var(--transition-base);
  outline: none;
}

.input-group input::placeholder {
  color: var(--text-muted);
}

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

.input-icon {
  position: absolute;
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  transition: color var(--transition-base);
  width: 20px;
  height: 20px;
}

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

/* ─── Login Button ────────────────────────────────────────────────────────── */
.btn-login {
  position: relative;
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: var(--gradient-accent);
  border: none;
  border-radius: var(--radius-md);
  color: #0a0e17;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  overflow: hidden;
  margin-top: var(--space-sm);
}

.btn-login:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

.btn-login:active:not(:disabled) {
  transform: translateY(0);
}

.btn-login:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-login .btn-text {
  transition: opacity var(--transition-fast);
}

.btn-login.loading .btn-text {
  opacity: 0;
}

.btn-login .spinner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 22px;
  height: 22px;
  border: 2.5px solid rgba(10, 14, 23, 0.3);
  border-top-color: #0a0e17;
  border-radius: 50%;
  opacity: 0;
  transition: opacity var(--transition-fast);
  animation: spin 0.7s linear infinite;
}

.btn-login.loading .spinner {
  opacity: 1;
}

/* Ripple effect */
.btn-login .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: scale(0);
  animation: ripple 0.6s ease-out;
  pointer-events: none;
}

@keyframes ripple {
  to { transform: scale(4); opacity: 0; }
}

/* ─── Error Message ───────────────────────────────────────────────────────── */
.login-error {
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.2);
  border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-md);
  color: var(--error);
  font-size: var(--font-size-sm);
  text-align: center;
  display: none;
  animation: fadeInDown var(--transition-base) ease;
}

.login-error.visible {
  display: block;
}

/* ─── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .login-card {
    margin: var(--space-md);
    padding: var(--space-xl) var(--space-lg);
  }

  .login-logo h1 {
    font-size: var(--font-size-xl);
  }

  .login-logo-icon {
    font-size: 2.5rem;
  }
}