.login-container {
    position: relative;
    width: 360px;
    height: 120px;
    transition: all 0.2s ease;
}

.login-container:hover,
.login-container.delayed-hover {
    width: 372px !important;
    height: 275px !important;
}

.login-container.resetting {
    width: 360px !important;
    height: 120px !important;
    transition: all 2s ease;
}

.login-box {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 5px 18px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
    z-index: 2;
    opacity: 1;
    visibility: visible;
}

.login-container:hover .login-box,
.login-container.delayed-hover .login-box {
    opacity: 0;
    visibility: hidden;
    transform: scale(0.9);
}

.login-container.resetting .login-box {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
    transition: all 2s ease;
}

.login-box h2 {
    font-size: 1.8em;
    color: #1e40af;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.login-box p {
    font-size: 1.08em;
    color: #6b7280;
}

.login-form {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #ffffff;
    border-radius: 12px;
    padding: 18px;
    box-shadow: 0 5px 18px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: scale(0.9);
    transition: all 0.3s ease;
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.login-container:hover .login-form,
.login-container.delayed-hover .login-form {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
}

.login-container.resetting .login-form {
    opacity: 0;
    visibility: hidden;
    transform: scale(0.9);
    transition: all 2s ease;
}

.login-form .form-floating input {
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 1.08em;
    transition: border-color 0.3s ease;
}

.login-form .form-floating input:focus {
    border-color: #1e40af;
    box-shadow: none;
}

.login-form button {
    width: 100%;
    padding: 10px;
    background: #1e40af;
    border: none;
    border-radius: 6px;
    color: white;
    font-size: 1.08em;
    cursor: pointer;
    transition: background 0.3s ease;
}

.login-form button:hover {
    background: #1e3a8a;
}

.rotating-border {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 367px !important;
    height: 127px !important;
    transform: translate(-50%, -50%);
    border-radius: 12px;
    background: conic-gradient(#60a5fa, #a78bfa, #f472b6, #facc15, #60a5fa);
    z-index: 0;
    transition: all 0.1s ease !important;
}

.login-container:hover .rotating-border,
.login-container.delayed-hover .rotating-border {
    width: 386px !important;
    height: 290px !important;
}

.login-container.resetting .rotating-border {
    width: 367px !important;
    height: 127px !important;
    transition: all 2s ease !important;
}

.rotating-border::before {
    content: '';
    position: absolute;
    top: 4px;
    left: 4px;
    right: 4px;
    bottom: 4px;
    background: linear-gradient(135deg, #e0e7ff, #c3dafe);
    border-radius: 8px;
}

.rotating-border::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 12px;
    background: conic-gradient(#60a5fa, #a78bfa, #f472b6, #facc15, #60a5fa);
    animation: rotateColors 0.5s linear infinite;
    z-index: -1;
}

@keyframes rotateColors {
    0% {
        background: conic-gradient(#60a5fa, #a78bfa, #f472b6, #facc15, #60a5fa);
    }
    25% {
        background: conic-gradient(#facc15, #60a5fa, #a78bfa, #f472b6, #facc15);
    }
    50% {
        background: conic-gradient(#f472b6, #facc15, #60a5fa, #a78bfa, #f472b6);
    }
    75% {
        background: conic-gradient(#a78bfa, #f472b6, #facc15, #60a5fa, #a78bfa);
    }
    100% {
        background: conic-gradient(#60a5fa, #a78bfa, #f472b6, #facc15, #60a5fa);
    }
}
/* --- Hiệu ứng và kiểu đồng hồ kỹ thuật số --- */
.clock-container {
    background: linear-gradient(135deg, #FFFFFF, #F5F5F5);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 5px 18px rgba(0, 0, 0, 0.1);
    text-align: center;
    color: #37474F;
    margin-bottom: 2rem;
    width: 360px;
    border: 1px solid #ECEFF1;
    transition: transform 0.3s ease;
}

.clock-container:hover {
    transform: scale(1.02);
}

.clock {
    font-size: 2.7rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #60a5fa;
    text-shadow: 0 0 8px rgba(96, 165, 250, 0.4);
}

.date {
    font-size: 1rem;
    font-weight: 500;
    color: #37474F;
    margin: 0.5rem 0;
    padding: 0.3rem;
    background: linear-gradient(135deg, #F5F5F5, #ECEFF1);
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    text-shadow: 0 0 3px rgba(55, 71, 79, 0.2);
}

.lunar-date {
    font-size: 0.95rem;
    color: #facc15;
    background: linear-gradient(135deg, #a78bfa, #60a5fa);
    padding: 0.3rem;
    border-radius: 5px;
}

.glow {
    animation: glow 2.5s ease-in-out infinite alternate;
}

@keyframes glow {
    from {
        text-shadow: 0 0 5px rgba(96, 165, 250, 0.5), 0 0 10px rgba(96, 165, 250, 0.3);
    }
    to {
        text-shadow: 0 0 10px rgba(96, 165, 250, 0.7), 0 0 15px rgba(96, 165, 250, 0.5);
    }
}
.login-alert {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    padding: 12px 20px;
    border-radius: 6px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
    font-size: 14px;
    max-width: 320px;
    text-align: left;
}