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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, 
        #667eea 0%, 
        #764ba2 25%, 
        #f093fb 50%, 
        #f5576c 75%, 
        #4facfe 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

/* Animated background gradient */
@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Floating particles background */
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(255,255,255,0.1) 2px, transparent 2px),
        radial-gradient(circle at 80% 20%, rgba(255,255,255,0.15) 1px, transparent 1px),
        radial-gradient(circle at 40% 40%, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 200px 200px, 150px 150px, 100px 100px;
    animation: float 20s ease-in-out infinite;
}

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

.login-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    width: 450px;
    min-height: 520px;
    border-radius: 24px;
    padding: 48px 40px;
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    position: relative;
    transform: translateY(0);
    animation: slideUp 0.8s ease-out;
    z-index: 10;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-container::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4, #feca57);
    border-radius: 26px;
    opacity: 0;
    z-index: -1;
    transition: opacity 0.3s ease;
}

.login-container:hover::before {
    opacity: 0.1;
}

.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.login-header h1 {
    font-size: 32px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.login-header p {
    color: #64748b;
    font-size: 15px;
    font-weight: 400;
}

.form-group {
    margin-bottom: 24px;
    position: relative;
}

.form-label {
    font-weight: 500;
    color: #374151;
    margin-bottom: 8px;
    font-size: 14px;
    display: block;
}

.input-wrapper {
    position: relative;
}

.form-control {
    height: 52px;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    padding: 0 16px 0 48px;
    font-size: 15px;
    transition: all 0.3s ease;
    background: #fafbfc;
    font-weight: 400;
}

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

.input-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: #9ca3af;
    font-size: 16px;
    transition: color 0.3s ease;
}

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

.btn-login {
    width: 100%;
    height: 52px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    margin-top: 8px;
}

.btn-login::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;
}

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

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

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

.alert {
    border-radius: 12px;
    border: none;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 20%, 40%, 60%, 80%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
    border-left: 4px solid #ef4444;
}

.forgot-password {
    text-align: center;
    margin-top: 24px;
}

.forgot-password a {
    color: #667eea;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
}

.forgot-password a:hover {
    color: #4f46e5;
    text-decoration: underline;
}

/* Responsive design */
@media (max-width: 480px) {
    .login-container {
        width: 90%;
        padding: 32px 24px;
        margin: 0 20px;
    }
    
    .login-header h1 {
        font-size: 28px;
    }
}

/* Loading animation for button */
.btn-login.loading {
    pointer-events: none;
}

.btn-login.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    margin: auto;
    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); }
}