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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow: hidden;
    position: relative;
}

.login-container {
    position: relative;
    z-index: 10;
}

.login-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    padding: 40px;
    width: 100%;
    max-width: 420px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: slideUp 0.6s ease-out;
}

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

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

.logo h1 {
    font-size: 48px;
    margin-bottom: 10px;
    animation: bounce 1s ease-in-out infinite alternate;
}

@keyframes bounce {
    from { transform: translateY(0px); }
    to { transform: translateY(-5px); }
}

.login-header h2 {
    font-size: 28px;
    font-weight: 700;
    color: #333;
    margin-bottom: 5px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-header p {
    color: #666;
    font-size: 16px;
    font-weight: 400;
}

.alert {
    padding: 15px 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
    animation: slideDown 0.3s ease-out;
}

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

.alert-error {
    background: #fee;
    color: #c53030;
    border-left: 4px solid #e53e3e;
}

.alert-success {
    background: #f0fff4;
    color: #38a169;
    border-left: 4px solid #48bb78;
}

.alert-icon {
    font-size: 18px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    color: #333;
    font-size: 14px;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 15px;
    font-size: 18px;
    z-index: 2;
    pointer-events: none;
}

.input-wrapper input {
    width: 100%;
    padding: 15px 15px 15px 50px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: white !important;
    position: relative;
    z-index: 1;
}

.input-wrapper input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    background: white !important;
}

.toggle-password {
    position: absolute;
    right: 15px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    z-index: 3;
    padding: 5px;
    border-radius: 6px;
    transition: background 0.2s;
    pointer-events: auto;
}

.toggle-password:hover {
    background: rgba(0, 0, 0, 0.05);
}

.login-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 16px 24px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    margin-top: 10px;
    z-index: 1;
}

.login-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

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

.login-btn:disabled {
    cursor: not-allowed;
    opacity: 0.8;
    transform: none;
}

.btn-loader {
    display: flex;
    align-items: center;
    justify-content: center;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.login-footer {
    text-align: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #e2e8f0;
}

.login-footer p {
    color: #666;
    font-size: 14px;
    margin-bottom: 5px;
}

.login-footer small {
    color: #999;
    font-size: 12px;
}

/* Arka Plan Animasyonu */
.background-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.floating-shape {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.floating-shape:nth-child(1) {
    width: 80px;
    height: 80px;
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.floating-shape:nth-child(2) {
    width: 60px;
    height: 60px;
    top: 60%;
    right: 10%;
    animation-delay: 2s;
}

.floating-shape:nth-child(3) {
    width: 100px;
    height: 100px;
    bottom: 20%;
    left: 15%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
        opacity: 0.5;
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
        opacity: 0.8;
    }
}

/* Responsive Tasarım */
@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .login-card {
        padding: 30px 25px;
        border-radius: 15px;
    }
    
    .login-header h2 {
        font-size: 24px;
    }
    
    .logo h1 {
        font-size: 40px;
    }
    
    .input-wrapper input {
        padding: 12px 12px 12px 45px;
        font-size: 16px;
    }
    
    .input-icon {
        left: 12px;
        font-size: 16px;
    }
    
    .login-btn {
        padding: 14px 20px;
        font-size: 15px;
    }
}

/* Dark mode desteği */
@media (prefers-color-scheme: dark) {
    .login-card {
        background: rgba(30, 30, 30, 0.95);
        color: white;
    }
    
    .login-header h2 {
        color: white;
    }
    
    .login-header p {
        color: #ccc;
    }
    
    .form-group label {
        color: #e2e8f0;
    }
    
    .input-wrapper input {
        background: rgba(255, 255, 255, 0.1);
        color: white;
        border-color: rgba(255, 255, 255, 0.2);
    }
    
    .input-wrapper input:focus {
        background: rgba(255, 255, 255, 0.15);
        border-color: #667eea;
    }
    
    .login-footer p {
        color: #ccc;
    }
    
    .login-footer small {
        color: #999;
    }
}