:root {
    --blue-primary: #1e3a8a;
    /* สีน้ำเงินเข้ม */
    --blue-secondary: #2563eb;
    /* สีน้ำเงินอ่อน */
    --blue-primary-rgb: 30, 58, 138;
}
body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(-45deg, #f5f5f5, #e5e5e5, #d5d5d5, #c5c5c5);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    position: relative;
    overflow: hidden;
}

@keyframes gradientBG {
    0% {
        background-position: 0% 50%;
    }

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

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

/* เพิ่มเอฟเฟกต์วงกลมเคลื่อนไหว */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 30%, rgba(255, 191, 0, 0.4) 0%, transparent 25%),
        radial-gradient(circle at 80% 70%, rgba(255, 191, 0, 0.4) 0%, transparent 25%),
        radial-gradient(circle at 50% 80%, rgba(255, 191, 0, 0.4) 0%, transparent 25%);
    animation: float 5s ease-in-out infinite;
    z-index: 0;
}


@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg);
    }

    25% {
        transform: translate(10px, 10px) rotate(5deg);
    }

    50% {
        transform: translate(0, 20px) rotate(0deg);
    }

    75% {
        transform: translate(-10px, 10px) rotate(-5deg);
    }
}

/* ปรับแต่ง container */
.login-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    overflow: hidden;
    position: relative;
}

/* ปรับสีให้เข้ากับธีม */
.login-header {
    background: linear-gradient(135deg, var(--blue-primary), var(--blue-secondary));
    color: white;
    padding: 25px 20px;
    text-align: center;
}

.btn-login {
    background: linear-gradient(135deg, var(--blue-primary), var(--blue-secondary));
    border: none;
    transition: all 0.3s ease;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(30, 58, 138, 0.3);
}

/* เพิ่มเอฟเฟกต์เมื่อโฟกัสที่ช่อง input */
.form-control:focus {
    border-color: var(--blue-primary);
    box-shadow: 0 0 0 0.25rem rgba(30, 58, 138, 0.25);
}

/* เพิ่มเอฟเฟกต์เมื่อโฮเวอร์ที่ปุ่ม */
.btn-outline-secondary {
    transition: all 0.3s ease;
}

.btn-outline-secondary:hover {
    background-color: var(--blue-primary);
    border-color: var(--blue-primary);
    color: white;
}

.login-body {
    padding: 30px;
    background-color: white;
}

.login-footer {
    background-color: #f8f9fa;
    padding: 15px;
    text-align: center;
    border-top: 1px solid #dee2e6;
}

.brand-logo {
    max-width: 150px;
    margin-bottom: 15px;
}

.btn-login {
    background-color: var(--blue-primary);
    border-color: var(--blue-primary);
    width: 100%;
    padding: 10px;
}

.btn-login:hover {
    background-color: var(--blue-secondary);
    border-color: var(--blue-secondary);
}

.form-control:focus {
    border-color: var(--blue-primary);
    box-shadow: 0 0 0 0.25rem rgba(var(--blue-primary-rgb), 0.25);
}        

.login-header {
    background: linear-gradient(to right, var(--blue-primary), var(--blue-secondary));
}

.btn-login {
    background-color: var(--blue-primary);
    border-color: var(--blue-primary);
    transition: all 0.3s ease;
}

.btn-login:hover {
    background-color: #1e40af;
    border-color: #1e40af;
}

.form-control:focus {
    border-color: var(--blue-primary);
    box-shadow: 0 0 0 0.25rem rgba(var(--blue-primary-rgb), 0.25);
}

.input-group-text {
    background-color: var(--blue-primary);
    color: white;
    border-color: var(--blue-primary);
}

/* ลบเส้นขอบและเงาเมื่อโฟกัส */
.form-control:focus,
.form-select:focus,
.form-check-input:focus {
    box-shadow: none !important;
    border-color: #dee2e6 !important;
    outline: none !important;
}

/* สำหรับปุ่ม toggle password */
.btn-outline-secondary:focus {
    box-shadow: none !important;
    outline: none !important;
}

/* สำหรับ checkbox */
.form-check-input:focus {
    border-color: #dee2e6 !important;
}

/* เปลี่ยนสีขอบเมื่อโฟกัสที่ input */
.form-control:focus {
    border-color: var(--blue-primary) !important;
    box-shadow: 0 0 0 0.1rem rgba(30, 58, 138, 0.1) !important;
}