/* تنسيق عام للصفحة */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    direction: rtl;
}

/* حاوية تسجيل الدخول */
.login-container {
    background: rgba(255, 255, 255, 0.95);
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 420px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    backdrop-filter: blur(10px);
}

.login-container:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
}

/* العنوان */
.login-container h2 {
    color: #2d3748;
    margin-bottom: 12px;
    font-size: 28px;
    font-weight: 700;
}

.login-container p {
    color: #6c757d;
    margin-bottom: 30px;
    font-size: 16px;
    line-height: 1.5;
}

/* رسائل التنبيه */
.messages {
    list-style: none;
    padding: 0;
    margin: 0 0 25px 0;
}

.messages li {
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 12px;
    font-weight: 500;
    text-align: right;
    display: flex;
    align-items: center;
    gap: 10px;
}

.messages li::before {
    font-size: 18px;
}

.messages .success {
    background-color: #f0fff4;
    color: #2f855a;
    border: 1px solid #c6f6d5;
}

.messages .success::before {
    content: "✅";
}

.messages .error {
    background-color: #fff5f5;
    color: #c53030;
    border: 1px solid #fed7d7;
}

.messages .error::before {
    content: "❌";
}

.messages .info {
    background-color: #ebf8ff;
    color: #2b6cb0;
    border: 1px solid #bee3f8;
}

.messages .info::before {
    content: "ℹ️";
}

.messages .warning {
    background-color: #fffbf0;
    color: #b7791f;
    border: 1px solid #feebc8;
}

.messages .warning::before {
    content: "⚠️";
}

/* نموذج التسجيل */
.login-container form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.login-container input {
    padding: 16px 18px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 16px;
    transition: all 0.3s ease;
    background-color: #f8fafc;
    font-family: inherit;
}

.login-container input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
    background-color: white;
    transform: translateY(-2px);
}

.login-container input::placeholder {
    color: #a0aec0;
}

/* مجموعة الإدخال */
.input-group {
    position: relative;
    text-align: right;
}

.input-group input {
    width: 100%;
    padding-right: 45px;
}

.input-group::before {
    position: absolute;
    top: 50%;
    right: 15px;
    transform: translateY(-50%);
    font-size: 20px;
    color: #a0aec0;
}

.input-group.username::before {
    content: "👤";
}

.input-group.password::before {
    content: "🔒";
}

/* زر التسجيل */
.login-container button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 16px;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
    font-family: inherit;
    position: relative;
    overflow: hidden;
}

.login-container button::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 100%);
    transition: transform 0.3s ease;
    transform: translateX(-100%);
}

.login-container button:hover {
    transform: translateY(-3px);
    box-shadow: 0 7px 20px rgba(102, 126, 234, 0.4);
}

.login-container button:hover::before {
    transform: translateX(0);
}

.login-container button:active {
    transform: translateY(0);
}

/* تأثيرات للوضع الليلي */
@media (prefers-color-scheme: dark) {
    .login-container {
        background: rgba(45, 55, 72, 0.95);
        color: white;
    }
    
    .login-container h2 {
        color: white;
    }
    
    .login-container p {
        color: #cbd5e0;
    }
    
    .login-container input {
        background-color: #4a5568;
        border-color: #4a5568;
        color: white;
    }
    
    .login-container input::placeholder {
        color: #a0aec0;
    }
    
    .login-container input:focus {
        background-color: #4a5568;
        border-color: #667eea;
    }
}

/* تصميم متجاوب */
@media (max-width: 480px) {
    body {
        padding: 15px;
    }
    
    .login-container {
        padding: 30px 20px;
    }
    
    .login-container h2 {
        font-size: 24px;
    }
    
    .login-container p {
        font-size: 14px;
    }
    
    .login-container input {
        padding: 14px 16px;
        font-size: 15px;
    }
    
    .login-container button {
        padding: 14px;
        font-size: 16px;
    }
}

/* رسوم متحركة دقيقة */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-container {
    animation: fadeIn 0.6s ease-out;
}

/* تحسينات إضافية للواجهة */
.login-footer {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #e2e8f0;
    color: #6c757d;
    font-size: 14px;
}

/* تأثيرات لرسائل الخطأ */
input:invalid {
    border-color: #fc8181;
}

input:valid {
    border-color: #68d391;
}