/* Reset ve genel ayarlar */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a2e, #16213e, #0f3460);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    overflow: hidden;
}

/* Arka plan animasyonu */
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 80%, rgba(120, 140, 200, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(120, 140, 200, 0.1) 0%, transparent 50%);
    animation: backgroundPulse 8s ease-in-out infinite;
}

@keyframes backgroundPulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 0.8; }
}

/* Login container */
.login-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: rgba(30, 30, 46, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(120, 140, 200, 0.2);
    border-radius: 16px;
    padding: 40px 30px;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.4),
        0 10px 20px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    animation: slideIn 0.8s ease-out;
    position: relative;
    overflow: hidden;
}

.login-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, #4a90e2, transparent);
    animation: shimmer 3s linear infinite;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Header */
.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #ffffff, #a8c8e1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-header p {
    color: #a8c8e1;
    font-size: 14px;
    font-weight: 300;
}

/* Form */
.login-form {
    margin-bottom: 20px;
}

.input-group {
    margin-bottom: 20px;
    position: relative;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: #a8c8e1;
    font-size: 14px;
    font-weight: 500;
}

.input-group input {
    width: 100%;
    padding: 14px 16px;
    background: rgba(20, 20, 36, 0.8);
    border: 1px solid rgba(120, 140, 200, 0.3);
    border-radius: 8px;
    color: #ffffff;
    font-size: 15px;
    transition: all 0.3s ease;
    outline: none;
}

.input-group input:focus {
    border-color: #4a90e2;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
    background: rgba(20, 20, 36, 1);
}

.input-group input::placeholder {
    color: #6c757d;
    font-weight: 300;
}

.input-group input:hover {
    border-color: rgba(120, 140, 200, 0.5);
}

/* Login button */
.login-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #4a90e2, #357abd);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.login-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 25px rgba(74, 144, 226, 0.3);
    background: linear-gradient(135deg, #5ba0f2, #4a90e2);
}

.login-btn:active {
    transform: translateY(0);
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.2);
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

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

/* Mesaj stilleri */
.error-message, .success-message {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 15px;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
}

.error-message {
    background: rgba(220, 53, 69, 0.15);
    border: 1px solid rgba(220, 53, 69, 0.3);
    color: #ff6b7a;
}

.success-message {
    background: rgba(40, 167, 69, 0.15);
    border: 1px solid rgba(40, 167, 69, 0.3);
    color: #4fd69c;
}

/* Footer */
.login-footer {
    text-align: center;
    margin-top: 20px;
}

.login-footer small {
    color: #6c757d;
    font-size: 12px;
}

/* Responsive tasarım */
@media (max-width: 480px) {
    .login-container {
        padding: 15px;
    }
    
    .login-box {
        padding: 30px 20px;
    }
    
    .login-header h1 {
        font-size: 24px;
    }
}

/* Loading animasyonu */
.login-btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.login-btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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