/* Reset و فونت */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
@font-face {
  font-family: 'titr';
  src: url('fonts/B Titr Bold_0.ttf') format('ttf');
}
@font-face {
  font-family: 'iran';
  src: url('fonts/fa-Iran-sans-web-bold.woff2') format('woff2');
}
@font-face {
  font-family: 'vazir';
  src: url('fonts/Vazirmatn-Bold.woff2') format('woff2');
}

:root {
    --primary: #2c3e50;
    --secondary: #3498db;
    --accent: #e74c3c;
    --success: #27ae60;
    --warning: #f39c12;
    --danger: #e74c3c;
    --light: #ecf0f1;
    --dark: #2c3e50;
    --gray: #7f8c8d;
    --light-gray: #f8f9fa;
    --border: #e1e5eb;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    color: var(--dark);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* بخش اصلی */
main {
    flex: 1;
    width: 100%;
    max-width: 500px;
    margin: 50px auto;
    padding: 0 20px;
}

/* پیام‌های سیستم */
.alert {
    padding: 15px 20px;
    border-radius: 12px;
    margin-bottom: 25px;
    font-weight: 500;
    display: flex;
    align-items: center;
    box-shadow: var(--shadow);
    animation: slideIn 0.5s ease;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.9);
}

.alert-success {
    color: #155724;
    border-right: 5px solid var(--success);
}

.alert-error {
    color: #721c24;
    border-right: 5px solid var(--danger);
}

.alert i {
    margin-left: 10px;
    font-size: 1.2rem;
}

/* فرم ورود */
.login-form {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    animation: fadeIn 0.8s ease;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.login-form::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--secondary) 0%, var(--primary) 100%);
}

.login-title {
    text-align: center;
    font-size: 2.2rem;
    color: var(--primary);
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 15px;
    font-weight: 700;
}

.login-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 50%;
    transform: translateX(50%);
    width: 100px;
    height: 4px;
    background: var(--accent);
    border-radius: 2px;
}

/* فرم */
.form-group {
    margin-bottom: 25px;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--primary);
    font-size: 1.1rem;
}

.form-group input {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--border);
    border-radius: 12px;
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--light-gray);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.form-group input:focus {
    outline: none;
    border-color: var(--secondary);
    background-color: white;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2), inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

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

/* دکمه */
.btn {
    display: inline-block;
    padding: 15px 30px;
    background: linear-gradient(90deg, var(--secondary) 0%, var(--primary) 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.4);
}

.btn:hover::before {
    opacity: 1;
}

.btn:active {
    transform: translateY(-1px);
}

.btn-block {
    display: block;
    width: 100%;
}

/* لینک ثبت نام */
.register-link {
    text-align: center;
    margin-top: 25px;
    padding: 20px;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 12px;
    border: 1px dashed var(--secondary);
}

.register-link p {
    color: var(--dark);
    margin-bottom: 10px;
    font-size: 1rem;
}

.register-link a {
    color: var(--secondary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
}

.register-link a:hover {
    color: var(--primary);
    transform: translateX(-5px);
}

.register-link a::before {
    content: '←';
    margin-right: 8px;
    transition: var(--transition);
}

.register-link a:hover::before {
    transform: translateX(-3px);
}

/* دکمه بازگشت */
.back-button {
    display: inline-flex;
    align-items: center;
    color: var(--secondary);
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 20px;
    transition: var(--transition);
}

.back-button:hover {
    color: var(--primary);
    transform: translateX(-5px);
}

.back-button::before {
    content: '←';
    margin-right: 8px;
}
/* انیمیشن‌ها */
@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(30px) scale(0.95); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0) scale(1); 
    }
}

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

/* افکت شیشه‌ای برای فرم */
.glass-effect {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

@media (max-width: 768px) {
    
    .login-form {
        padding: 30px 25px;
        margin: 20px;
    }
    
    .login-title {
        font-size: 1.8rem;
    }
    
    .btn {
        padding: 12px 25px;
    }
}

@media (max-width: 576px) {
    main {
        padding: 0 15px;
    }
    
    .login-form {
        padding: 25px 20px;
    }
    
    .login-title {
        font-size: 1.6rem;
        margin-bottom: 25px;
    }
    
    .form-group input {
        padding: 12px 15px;
    }
    
    .register-link {
        padding: 15px;
    }
    
}

/* استایل برای نمایش پسورد */
.password-toggle {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--gray);
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition);
}

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

.form-group:has(input[type="password"]) {
    position: relative;
}

.form-group:has(input[type="password"]) input {
    padding-right: 50px;
}