:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #60a5fa;
}

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

body {
    background: linear-gradient(135deg, #3b5be9 0%, #35318a 50%, #939dfb 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Tahoma, sans-serif;
    padding: 1rem;
}

@keyframes gradientShift {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    overflow: hidden;
    animation: cardSlideIn 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes cardSlideIn {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.login-body {
    padding: 2.5rem 2rem;
}

.logo-section {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-img {
    width: 140px;
    height: 140px;
    object-fit: contain;
    margin-bottom: 1rem;
    /* animation: logoFloat 3s ease-in-out infinite; */
}

@keyframes logoFloat {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-8px);
    }
}

.login-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 0.25rem;
    letter-spacing: -0.5px;
}

.login-subtitle {
    color: #6b7280;
    font-size: 0.95rem;
    font-weight: 400;
}

.form-floating {
    margin-bottom: 1.25rem;
}

.form-floating>.form-control {
    border: 2px solid #e5e7eb;
    border-radius: 14px;
    padding: 1rem 1rem;
    height: 60px;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    background: #f9fafb;
}

.form-floating>.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
    background: white;
}

.form-floating>label {
    padding: 1rem 1rem;
    color: #6b7280;
    font-size: 0.95rem;
}

.form-check {
    margin-bottom: 1.75rem;
}

.form-check-input {
    width: 1.15rem;
    height: 1.15rem;
    border: 2px solid #d1d5db;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-check-label {
    color: #4b5563;
    font-size: 0.9rem;
    cursor: pointer;
    margin-left: 0.5rem;
}

.btn-login {
    width: 100%;
    padding: 0.95rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border: none;
    color: white;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-bottom: 1rem;
    position: relative;
    overflow: hidden;
}

.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 ease;
}

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

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(37, 99, 235, 0.35);
}

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

.btn-back {
    width: 100%;
    padding: 0.95rem;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 14px;
    background: #f3f4f6;
    border: 2px solid transparent;
    color: #4b5563;
    transition: all 0.3s ease;
}

.btn-back:hover {
    background: white;
    border-color: #e5e7eb;
    color: #1f2937;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.alert {
    border-radius: 14px;
    border: none;
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    animation: alertSlide 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes alertSlide {
    from {
        opacity: 0;
        transform: translateY(-15px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-danger {
    background-color: #fef2f2;
    color: #991b1b;
    border-left: 4px solid #dc2626;
}

.alert-success {
    background-color: #f0fdf4;
    color: #166534;
    border-left: 4px solid #16a34a;
}

.divider {
    display: flex;
    align-items: center;
    margin: 1.5rem 0;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: #e5e7eb;
}

.divider span {
    padding: 0 1rem;
    color: #9ca3af;
    font-size: 0.85rem;
    font-weight: 500;
}

.footer-text {
    text-align: center;
    margin-top: 2rem;
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.85rem;
}

.footer-text a {
    color: white;
    text-decoration: underline;
    font-weight: 500;
}

.btn-login:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
    border-width: 0.15rem;
}

@media (max-width: 480px) {
    .login-body {
        padding: 2rem 1.5rem;
    }
}