/* Genel Ayarlar */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Animasyonlu Arka Plan */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}

.circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 20s infinite ease-in-out;
}

.circle-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.circle-2 {
    width: 200px;
    height: 200px;
    top: 60%;
    right: 10%;
    animation-delay: 4s;
}

.circle-3 {
    width: 250px;
    height: 250px;
    bottom: 10%;
    left: 50%;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) scale(1);
        opacity: 0.3;
    }
    50% {
        transform: translateY(-30px) scale(1.1);
        opacity: 0.5;
    }
}

/* Container */
.container {
    position: relative;
    z-index: 1;
}

/* Login Card */
.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.6s ease-out;
}

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

/* Logo Section */
.logo-section {
    text-align: center;
    margin-bottom: 30px;
}

.logo-wrapper {
    display: inline-block;
    position: relative;
    margin-bottom: 15px;
}

.logo {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #667eea;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05) rotate(5deg);
}

.brand-name {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

/* Welcome Text */
.welcome-text {
    text-align: center;
    margin-bottom: 30px;
}

.welcome-text h2 {
    font-size: 26px;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 8px;
}

.welcome-text p {
    font-size: 14px;
    color: #718096;
    margin: 0;
}

/* Form Styling */
.login-form {
    width: 100%;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    font-size: 14px;
    font-weight: 500;
    color: #4a5568;
    margin-bottom: 8px;
    display: block;
}

.form-label i {
    margin-right: 6px;
    color: #667eea;
}

.input-wrapper {
    position: relative;
}

.form-control {
    width: 100%;
    padding: 14px 45px 14px 45px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 15px;
    transition: all 0.3s ease;
    background: #f7fafc;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
    background: #ffffff;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.input-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: #a0aec0;
    font-size: 16px;
    pointer-events: none;
    transition: color 0.3s ease;
}

.form-control:focus + .input-icon,
.form-control:focus ~ .input-icon {
    color: #667eea;
}

.toggle-password {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #a0aec0;
    cursor: pointer;
    font-size: 16px;
    transition: color 0.3s ease;
    padding: 5px;
}

.toggle-password:hover {
    color: #667eea;
}

/* Form Options */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    font-size: 14px;
}

.form-check {
    display: flex;
    align-items: center;
}

.form-check-input {
    width: 18px;
    height: 18px;
    margin-right: 8px;
    cursor: pointer;
    border: 2px solid #cbd5e0;
    border-radius: 4px;
}

.form-check-input:checked {
    background-color: #667eea;
    border-color: #667eea;
}

.form-check-label {
    color: #4a5568;
    cursor: pointer;
    margin: 0;
}

.forgot-password {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.forgot-password:hover {
    color: #764ba2;
}

/* Login Button */
.btn-login {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(102, 126, 234, 0.4);
}

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

.btn-login:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* Divider */
.divider {
    text-align: center;
    margin: 25px 0;
    position: relative;
}

.divider::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 45%;
    height: 1px;
    background: #e2e8f0;
}

.divider::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    width: 45%;
    height: 1px;
    background: #e2e8f0;
}

.divider span {
    background: white;
    padding: 0 15px;
    color: #a0aec0;
    font-size: 14px;
}

/* Signup Section */
.signup-section {
    text-align: center;
}

.signup-section p {
    color: #718096;
    font-size: 14px;
    margin: 0;
}

.signup-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.signup-link:hover {
    color: #764ba2;
}

/* Alert Messages */
#alertContainer {
    margin-bottom: 20px;
}

.alert {
    padding: 14px 18px;
    border-radius: 10px;
    font-size: 14px;
    border: none;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-success {
    background: #d4edda;
    color: #155724;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
}

.alert i {
    margin-right: 8px;
}

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

.login-footer p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 13px;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .login-card {
        padding: 30px 20px;
        border-radius: 20px;
    }

    .logo {
        width: 70px;
        height: 70px;
    }

    .brand-name {
        font-size: 24px;
    }

    .welcome-text h2 {
        font-size: 22px;
    }

    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .circle-1,
    .circle-2,
    .circle-3 {
        display: none;
    }
}

@media (max-width: 576px) {
    .login-card {
        padding: 25px 15px;
    }

    .welcome-text h2 {
        font-size: 20px;
    }

    .form-control {
        padding: 12px 40px 12px 40px;
        font-size: 14px;
    }

    .btn-login {
        padding: 14px;
        font-size: 15px;
    }
}