/* CSS Variables */
:root {
    --primary: #7b3fe4;
    --primary-light: #9361f3;
    --primary-dark: #5c2db0;
    --secondary: #00e4d0;
    --accent: #ff3e8e;
    --dark: #0a0e17;
    --darker: #050912;
    --light: #f8f9fc;
    --gray: #a0aec0;
    --gray-dark: #2d3748;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --card-bg: rgba(13, 17, 28, 0.8);
    --card-border: rgba(123, 63, 228, 0.15);
    --gradient-primary: linear-gradient(135deg, var(--primary), var(--primary-dark));
    --gradient-accent: linear-gradient(135deg, var(--primary), var(--secondary));
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', sans-serif;
    background-color: var(--dark);
    color: var(--light);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(123, 63, 228, 0.15), transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(0, 228, 208, 0.15), transparent 50%);
    z-index: -1;
}

a {
    text-decoration: none;
    color: var(--primary-light);
    transition: var(--transition);
}

a:hover {
    color: var(--primary);
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
header {
    padding: 20px 0;
    position: relative;
    z-index: 10;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--light);
    display: flex;
    align-items: center;
}

.logo span {
    color: var(--primary);
}

.header-links {
    display: flex;
    gap: 20px;
    align-items: center;
}

.header-links a {
    font-weight: 500;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 0;
}

@media (max-width: 768px) {
    .main-content {
        padding: 24px 0;
        min-height: 60vh;
    }
}
@media (max-width: 480px) {
    .main-content {
        padding: 16px 0;
        min-height: 70vh;
    }
}

.login-container {
    width: 100%;
    max-width: 420px;
    background: var(--card-bg);
    border-radius: 16px;
    border: 1px solid var(--card-border);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 12px;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.login-subtitle {
    color: var(--gray);
    font-size: 1rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-label {
    font-weight: 600;
    font-size: 0.95rem;
    display: flex;
    justify-content: space-between;
}

.form-label a {
    font-size: 0.85rem;
    font-weight: 500;
}

.form-input {
    background-color: rgba(45, 55, 72, 0.3);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--light);
    font-size: 1rem;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(123, 63, 228, 0.2);
}

.form-input::placeholder {
    color: var(--gray);
    opacity: 0.7;
}

.password-wrapper {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--gray);
    cursor: pointer;
    font-size: 1rem;
}

.password-toggle:hover {
    color: var(--light);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.checkbox-input {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.checkbox-label {
    font-size: 0.9rem;
    color: var(--gray);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(123, 63, 228, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 7px 20px rgba(123, 63, 228, 0.6);
}

.btn-block {
    width: 100%;
}

.divider {
    display: flex;
    align-items: center;
    margin: 24px 0;
    color: var(--gray);
    font-size: 0.9rem;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--gray-dark);
}

.divider::before {
    margin-right: 16px;
}

.divider::after {
    margin-left: 16px;
}

.social-login {
    display: flex;
    gap: 16px;
}

.social-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px;
    border-radius: 8px;
    background-color: rgba(45, 55, 72, 0.3);
    border: 1px solid var(--card-border);
    color: var(--light);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.social-btn:hover {
    background-color: rgba(45, 55, 72, 0.5);
    transform: translateY(-2px);
}

.social-icon {
    width: 20px;
    height: 20px;
}

.register-link {
    text-align: center;
    margin-top: 24px;
    font-size: 0.95rem;
    color: var(--gray);
}

.register-link a {
    font-weight: 600;
}

/* Animated Background */
.animated-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -1;
}

.particle {
    position: absolute;
    border-radius: 50%;
    background: rgba(123, 63, 228, 0.2);
    animation: move 8s infinite linear;
}

@keyframes move {
    0% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }
    50% {
        opacity: 0.5;
    }
    100% {
        transform: translateY(-100vh) translateX(100px);
        opacity: 0;
    }
}

/* Footer */
footer {
    padding: 24px 0;
    text-align: center;
    color: var(--gray);
    font-size: 0.9rem;
    border-top: 1px solid var(--gray-dark);
    margin-top: auto;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .login-container {
        padding: 30px 24px;
        max-width: 100%;
        margin: 0 16px;
    }
    
    .social-login {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .login-title {
        font-size: 1.75rem;
    }
    
    .login-container {
        padding: 24px 20px;
    }
    
    .header-links {
        gap: 12px;
    }
}
  /* Simple loader & toast styling */
    #loader {
      display: none;
      margin-top: 1rem;
      font-weight: bold;
    }
    #toast {
      position: fixed;
      top: 0;
      left: 50%;
      transform: translateX(-50%);
      background: #333;
      color: #fff;
      padding: 1rem 1.5rem;
      border-radius: 0 0 4px 4px;
      opacity: 0;
      transition: opacity 0.3s, top 0.3s;
      z-index: 1000;
    }
    #toast.success { background: #28a745; }
    #toast.error   { background: #dc3545; }
    #toast button  {
      background: none;
      border: none;
      color: #fff;
      font-size: 1.2rem;
      position: absolute;
      right: 0.5rem;
      top: 0.2rem;
      cursor: pointer;
    }