:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --dark-bg: #0f172a;
    --darker-bg: #020617;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --success-color: #10b981;
    --error-color: #ef4444;
    --gradient: linear-gradient(135deg, #6366f1, #8b5cf6);
}

.auth-body {
    background: linear-gradient(135deg, var(--darker-bg) 0%, var(--dark-bg) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Vazir', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    padding: 20px;
}

.auth-container {
    position: relative;
    width: 100%;
    max-width: 450px;
}

.auth-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    z-index: 2;
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
    position: relative;
}

.back-home {
    position: absolute;
    right: 0;
    top: 0;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem;
    transition: color 0.3s ease;
}

.back-home:hover {
    color: var(--primary-color);
}

.auth-header h2 {
    color: var(--text-primary);
    font-size: 1.8rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
}

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

.input-icon {
    position: absolute;
    right: 15px;
    color: var(--text-secondary);
    z-index: 2;
}

.input-group input {
    width: 100%;
    padding: 12px 45px 12px 15px;
    background: rgba(30, 41, 59, 0.8);
    border: 2px solid #334155;
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(30, 41, 59, 1);
}

.password-toggle {
    position: absolute;
    left: 15px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    z-index: 2;
}

.password-strength {
    margin-top: 0.5rem;
}

.strength-bar {
    height: 4px;
    background: #334155;
    border-radius: 2px;
    margin-bottom: 0.25rem;
    position: relative;
    overflow: hidden;
}

.strength-bar::after {
    content: '';
    position: absolute;
    height: 100%;
    width: 0%;
    background: var(--error-color);
    transition: all 0.3s ease;
}

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

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.checkbox-container {
    display: flex;
    align-items: center;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.checkbox-container input {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid #334155;
    border-radius: 4px;
    margin-left: 8px;
    position: relative;
    transition: all 0.3s ease;
}

.checkbox-container input:checked + .checkmark {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-container input:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    color: white;
    font-size: 12px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.forgot-password {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.forgot-password:hover {
    color: var(--secondary-color);
}

.auth-btn {
    width: 100%;
    background: var(--gradient);
    color: white;
    border: none;
    padding: 12px;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.auth-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.3);
}

.btn-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #334155;
}

.auth-footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Particles Background */
.auth-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.particle {
    position: absolute;
    background: var(--gradient);
    border-radius: 50%;
    animation: float-particle 6s ease-in-out infinite;
}

.particle:nth-child(1) {
    width: 8px;
    height: 8px;
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.particle:nth-child(2) {
    width: 12px;
    height: 12px;
    top: 60%;
    left: 80%;
    animation-delay: 1s;
}

.particle:nth-child(3) {
    width: 6px;
    height: 6px;
    top: 80%;
    left: 20%;
    animation-delay: 2s;
}

.particle:nth-child(4) {
    width: 10px;
    height: 10px;
    top: 40%;
    left: 90%;
    animation-delay: 3s;
}

.particle:nth-child(5) {
    width: 7px;
    height: 7px;
    top: 10%;
    left: 70%;
    animation-delay: 4s;
}

@keyframes float-particle {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0.7;
    }
    50% {
        transform: translateY(-20px) translateX(10px);
        opacity: 1;
    }
}

/* Responsive */
@media (max-width: 576px) {
    .auth-card {
        padding: 2rem 1.5rem;
    }
    
    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .forgot-password {
        align-self: flex-end;
    }
}
.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error-color);
    color: var(--error-color);
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.alert-error i {
    font-size: 1.2rem;
}