:root {
    --primary-color: #6366f1;
    --secondary-color: #4f46e5;
    --accent-color: #8b5cf6;
    --text-color: #1f2937;
    --light-gray: #f8fafc;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --error-color: #ef4444;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'IRANSans', sans-serif;
}

body {
    background: url('../images/backgrounds.jpg') no-repeat center center fixed;
    background-size: cover;
    min-height: 100vh;
    margin: 0;
    padding: 0;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.4) 0%, rgba(0, 0, 0, 0.6) 100%);
    z-index: 0;
}

header {
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    margin-right: 20px;
    transition: color 0.3s;
}

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

.auth-section {
    padding: 170px 0 50px;
    min-height: calc(100vh - 150px);
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-container {
    max-width: 900px;
    width: 90%;
    margin: 0 auto;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 25px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    padding: 50px;
    position: relative;
    z-index: 2;
    animation: slideUp 0.8s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(80px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.auth-container h2 {
    text-align: center;
    color: white;
    margin-bottom: 40px;
    font-size: 32px;
    font-weight: 700;
    position: relative;
    padding-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.auth-container h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
    animation: lineGrow 0.8s ease-in-out;
}

@keyframes lineGrow {
    from {
        width: 0;
    }
    to {
        width: 80px;
    }
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.form-row {
    display: flex;
    gap: 25px;
}

.form-row .form-group {
    flex: 1;
}

.form-group {
    position: relative;
    animation: fadeIn 0.6s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.form-group label {
    display: block;
    margin-bottom: 12px;
    color: white;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 18px 20px;
    border: 2px solid var(--glass-border);
    border-radius: 15px;
    font-size: 16px;
    transition: all 0.4s ease;
    background: rgba(255, 255, 255, 0.15);
    color: white;
    backdrop-filter: blur(10px);
}

.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 25px rgba(99, 102, 241, 0.4);
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-3px);
}

.form-group input:focus::placeholder,
.form-group select:focus::placeholder {
    color: rgba(255, 255, 255, 0.9);
}

.btn-submit {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    padding: 20px;
    border: none;
    border-radius: 15px;
    cursor: pointer;
    font-size: 18px;
    font-weight: 700;
    transition: all 0.4s ease;
    margin-top: 20px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
}

.btn-submit:before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: 0.6s;
}

.btn-submit:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 35px rgba(99, 102, 241, 0.5);
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
}

.btn-submit:hover:before {
    left: 100%;
}

.btn-submit:active {
    transform: translateY(-2px);
}

.auth-switch {
    text-align: center;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--glass-border);
    animation: fadeIn 0.8s ease-in-out;
}

.auth-switch p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 16px;
}

.auth-switch a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s ease;
    padding: 8px 16px;
    border-radius: 20px;
    background: rgba(139, 92, 246, 0.2);
    border: 1px solid rgba(139, 92, 246, 0.3);
}

.auth-switch a:hover {
    color: white;
    background: rgba(139, 92, 246, 0.4);
    border-color: rgba(139, 92, 246, 0.6);
    transform: translateY(-2px);
}

.alert {
    padding: 20px;
    border-radius: 15px;
    margin-bottom: 25px;
    animation: slideIn 0.6s ease-in-out;
    backdrop-filter: blur(10px);
}

.alert-error {
    background-color: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: #fecaca;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.2);
    border: 1px solid rgba(16, 185, 129, 0.4);
    color: #a7f3d0;
}

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

footer {
    position: relative;
    z-index: 1000;
    margin-top: auto;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.social-links a {
    color: white;
    text-decoration: none;
    margin-left: 15px;
    font-size: 20px;
    transition: all 0.3s ease;
    padding: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
}

.social-links a:hover {
    color: var(--primary-color);
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .auth-container {
        width: 95%;
        padding: 40px 30px;
        margin: 20px;
    }
    
    .form-row {
        flex-direction: column;
        gap: 20px;
    }
    
    .form-group input,
    .form-group select {
        padding: 16px 18px;
    }
    
    .auth-container h2 {
        font-size: 28px;
    }
    
    .nav-container {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-links {
        display: flex;
        gap: 15px;
    }
    
    .footer-container {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .social-links {
        margin-top: 15px;
    }
}

@media (max-width: 480px) {
    .auth-container {
        padding: 30px 20px;
    }
    
    .auth-container h2 {
        font-size: 24px;
    }
    
    .btn-submit {
        padding: 18px;
        font-size: 16px;
    }
} 

/* انیمیشن‌های اضافی */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(99, 102, 241, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0);
    }
}

.btn-submit:focus {
    animation: pulse 2s infinite;
}

/* بهبود accessibility */
.form-group input:focus,
.form-group select:focus,
.btn-submit:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* استایل برای حالت loading */
.btn-submit.loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn-submit.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    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); }
}

.form-group.focused label {
    color: var(--accent-color);
    transform: translateY(-2px);
}

.form-group.focused input,
.form-group.focused select {
    border-color: var(--accent-color);
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.3);
}

/* بهبود استایل select */
.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%23ffffff' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 15px center;
    background-size: 16px;
    padding-right: 45px;
}

/* بهبود استایل input های password */
.form-group input[type="password"] {
    letter-spacing: 2px;
}

/* افکت hover برای لینک‌ها */
.auth-switch a {
    position: relative;
    overflow: hidden;
}