body {
    background: linear-gradient(to right, #DFEFF5, #B4DEED);
}

header {
    font-family: sans-serif;
    background: rgba(255, 255, 255, 0.9);
    padding: 1rem;
    font-size: 1.2rem;
    font-weight: bold;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* ตัวอักษรเมนู */
header nav a {
    margin-left: 1rem;
    text-decoration: none;
    color: #0d6efd;
    font-weight: 500;
    font-size: 1rem;
}

header nav a:hover {
    text-decoration: underline;
}

/* Hamburger button */
.navbar-toggler {
    font-size: 1.5rem;
    border: none;
    background: transparent;
    cursor: pointer;
}

main {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.login-card {
    width: 100%;
    max-width: 400px;
    padding: 2rem;
    border-radius: 0.75rem;
    background: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

footer {
    background: rgba(255, 255, 255, 0.9);
    padding: 1rem;
    text-align: center;
    font-size: 0.9rem;
    box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.1);
}

.menu-card .list-group-item {
    border: none;
    /* ตัดเส้นขอบเดิมของ bootstrap */
    padding: 12px 16px;
    transition: all 0.2s ease-in-out;
    font-weight: 500;
}

.menu-card .list-group-item a {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #333;
    transition: color 0.2s ease;
}

.menu-card .list-group-item i {
    font-size: 1.1rem;
    transition: transform 0.2s ease, color 0.2s ease;
}

.menu-card .list-group-item:hover {
    color: #fff;
    background-color: #0d6efd;
    /* สีอ่อนๆ เวลา hover */
    transform: translateX(4px);
    /* เลื่อนไปขวานิดๆ */
    box-shadow: inset 4px 0px 0px #0d6efd;
    /* แถบสีน้ำเงินข้างซ้าย */
}

.menu-card .list-group-item:hover a {
    color: #fff;
    /* เปลี่ยนสี text เวลา hover */
}

.menu-card .list-group-item:hover i {
    color: #0d6efd;
    transform: scale(1.2);
    /* ขยาย icon เบาๆ */
}

/* กล่องหัวข้อ */
.guide-header {
    background: linear-gradient(45deg, #5bc0de, #0d6efd);
    color: #fff;
    border-radius: 15px 15px 0 0;
    padding: 20px;
    text-align: center;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);
    font-weight: bold;
}

/* scoping class เพื่อไม่ให้ชนกับ CSS อื่น */
.guide-block {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 6px 18px rgba(13, 110, 253, 0.08);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}

/* header gradient */
.guide-block .guide-header {
    background: linear-gradient(135deg, #8CB8FF, #578EE6 70%);
    color: #212529;
    padding: 18px 16px;
    text-align: center;
    font-weight: 700;
    letter-spacing: .2px;
    text-shadow: 0 1px 0 rgba(0, 0, 0, 0.12);
}

/* body */
.guide-block .guide-body {
    background: #ffffff;
    padding: 14px;
}

/* list */
.guide-block .guide-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.guide-block .guide-item {
    margin-bottom: 8px;
}

/* link layout */
.guide-block .guide-link {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 10px 12px;
    border-radius: 10px;
    text-decoration: none;
    color: #333;
    transition: all .18s ease;
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.02);
}

/* icon */
.guide-block .guide-icon {
    flex: 0 0 36px;
    height: 36px;
    display: inline-grid;
    place-items: center;
    border-radius: 8px;
    background: linear-gradient(180deg, #fff, rgba(0, 0, 0, 0.02));
    box-shadow: 0 2px 6px rgba(13, 110, 253, 0.04);
}

.guide-block .guide-icon i {
    color: #d9534f;
    font-size: 18px;
    transition: transform .18s ease, color .18s ease;
}

/* text area */
.guide-block .guide-title {
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.35;
    color: #212529;
}

/* hover */
.guide-block .guide-link:hover {
    background: #f8fbff;
    transform: translateX(6px);
    color: #0d6efd;
    box-shadow: 0 6px 18px rgba(13, 110, 253, 0.06);
}

.guide-block .guide-link:hover .guide-icon i {
    color: #0d6efd;
    transform: scale(1.15) rotate(-6deg);
}

/* responsive tweaks (ใน sidebar เล็กๆ ดูดี) */
@media (max-width: 575.98px) {
    .guide-block .guide-icon {
        flex-basis: 32px;
        height: 32px;
    }

    .guide-block .guide-title {
        font-size: 0.92rem;
    }
}

.user-info {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border: 1px solid #dee2e6;
    transition: all 0.3s ease;
}

.user-info:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
}

.user-name {
    font-weight: 600;
    color: #343a40;
}

.user-position {
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

nav.startup-nav {
    font-family: "Segoe UI", "Prompt", sans-serif;
    font-size: 1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 1rem;
}

nav.startup-nav a {
    position: relative;
    padding: 8px 14px;
    border-radius: 12px;
    text-decoration: none;
    color: #0d6efd;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Hover Gradient */
nav.startup-nav a:hover {
    background: linear-gradient(135deg, #1C57D6, #1F98ED);
    color: #fff !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(28, 87, 214, 0.25);
}

/* Active Link */
nav.startup-nav a.active {
    background: linear-gradient(135deg, #89E838, #1F98ED);
    color: #fff !important;
    font-weight: 600;
    box-shadow: 0 4px 10px rgba(137, 232, 56, 0.3);
}

/* Underline animation */
nav.startup-nav a::after {
    content: "";
    position: absolute;
    bottom: 4px;
    left: 50%;
    width: 0%;
    height: 2px;
    background: #fff;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

nav.startup-nav a:hover::after {
    width: 60%;
}

/* Responsive: ซ่อนบนมือถือ (เพราะคุณมี d-none d-lg-flex อยู่แล้ว) */
@media (max-width: 991px) {
    nav.startup-nav {
        display: none !important;
    }
}

.container-body {
    background: #fff;
    max-width: 1280px;
    margin: auto;
    padding: 20px;
}

.container-body .accept-btn {
    background-color: #28a745;
    color: white;
}

.container-body .decline-btn {
    background-color: #dc3545;
    color: white;
}

.container-body button {
    margin-left: 10px;
    padding: 10px 20px;
    border: none;
    cursor: pointer;
    font-size: 14px;
}

.block-body {
    background: #fff;
    padding: 20px;
}