body {
    font-family: 'Niramit', sans-serif;
    background-color: #f4f7f9;
    background-image: radial-gradient(rgba(9, 0, 107, 0.12) 2px, transparent 2px);
    background-size: 25px 25px;
    background-position: center center;
    background-attachment: fixed;
}

.card {
    border: none;
    border-radius: 12px;
}

.menu-card {
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.menu-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

/* ========================================= */
/* 🗂️ Fixed Drawer Sidebar (Admin / Staff / Mentor) */
/* ========================================= */

/* ตัวแปรความกว้างและความสูง navbar */
:root {
    --sidebar-w: 220px;
    --sidebar-w-collapsed: 60px;
    --navbar-h: 62px;
    /* ความสูงโดยประมาณของ sticky navbar */
}

/* Sidebar หลัก — fixed ซ้ายสุด เต็มความสูง */
.app-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: var(--sidebar-w);
    background: #fff;
    border-right: 1px solid #e9ecef;
    box-shadow: 2px 0 12px rgba(0, 0, 0, 0.07);
    z-index: 1040;
    display: flex;
    flex-direction: column;
    transition: width 0.25s ease;
    overflow: hidden;
}

/* สถานะย่อ */
.app-sidebar.collapsed {
    width: var(--sidebar-w-collapsed);
}

/* ---- Sidebar Header (โลโก้ + hamburger) ---- */
.sidebar-brand {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    height: 60px;
    border-bottom: 1px solid #e9ecef;
    flex-shrink: 0;
    overflow: hidden;
}

.sidebar-brand-text {
    font-size: 0.82rem;
    font-weight: 700;
    color: #0d6efd;
    white-space: nowrap;
    opacity: 1;
    transition: opacity 0.15s ease;
}

.app-sidebar.collapsed .sidebar-brand-text {
    opacity: 0;
    width: 0;
    pointer-events: none;
}

.sidebar-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: #6c757d;
    font-size: 1.3rem;
    padding: 4px 6px;
    border-radius: 6px;
    flex-shrink: 0;
    transition: background 0.2s, color 0.2s;
    line-height: 1;
}

.sidebar-toggle:hover {
    background: #f0f4ff;
    color: #0d6efd;
}

/* ---- Nav items ---- */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 8px 6px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sidebar-nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 10px;
    border-radius: 8px;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-size: 0.875rem;
    font-family: 'Niramit', sans-serif;
    color: #495057;
    white-space: nowrap;
    overflow: hidden;
    transition: background 0.18s, color 0.18s;
    text-decoration: none;
}

.sidebar-nav-item i {
    font-size: 1.05rem;
    flex-shrink: 0;
    width: 22px;
    text-align: center;
}

.sidebar-nav-item .nav-label {
    opacity: 1;
    transition: opacity 0.15s ease;
    overflow: hidden;
}

.app-sidebar.collapsed .sidebar-nav-item .nav-label {
    opacity: 0;
    width: 0;
    pointer-events: none;
}

.sidebar-nav-item:hover {
    background: #f0f4ff;
    color: #0d6efd;
}

.sidebar-nav-item.active {
    background: #0d6efd;
    color: #fff !important;
    font-weight: 600;
}

.sidebar-nav-item.danger {
    color: #dc3545;
}

.sidebar-nav-item.danger:hover {
    background: #fff1f1;
    color: #b02a37;
}

/* spacer ดัน logout ลงล่าง */
.sidebar-spacer {
    flex: 1;
    min-height: 16px;
}

/* ---- Tooltip เมื่อ collapsed ---- */
.app-sidebar.collapsed .sidebar-nav-item {
    position: relative;
    justify-content: center;
    padding: 10px 0;
}

.app-sidebar.collapsed .sidebar-nav-item::after {
    content: attr(data-label);
    position: absolute;
    left: calc(var(--sidebar-w-collapsed) + 4px);
    top: 50%;
    transform: translateY(-50%);
    background: #333;
    color: #fff;
    font-size: 0.78rem;
    padding: 4px 10px;
    border-radius: 6px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s;
    z-index: 9999;
}

.app-sidebar.collapsed .sidebar-nav-item:hover::after {
    opacity: 1;
}

/* ---- Content area เลื่อนขวาตาม sidebar ---- */
.sidebar-page-wrapper {
    margin-left: var(--sidebar-w);
    transition: margin-left 0.25s ease;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding-bottom: 1rem;
}

.sidebar-page-wrapper.collapsed {
    margin-left: var(--sidebar-w-collapsed);
}

/* Footer ภายใน sidebar-page-wrapper */
.sidebar-footer {
    margin-top: auto;
    background-color: #0d6efd;
    color: #fff;
    text-align: center;
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
    width: 100%;
}

/* ========================================= */
/* 📐 Full-width Layout (Navbar → Content → Footer) */
/* ========================================= */

/* Navbar ติดบนสุด เต็มจอทุกขนาด */
#main-nav {
    width: 100%;
    left: 0;
    top: 0;
    z-index: 1030;
}

/* Navbar เมื่อ sidebar แสดงอยู่ — ดัน content ออกจากซ้าย */
#main-nav.has-sidebar {
    position: sticky;
    top: 0;
    padding-left: calc(var(--sidebar-w) + 0.5rem);
    transition: padding-left 0.25s ease;
}

#main-nav.has-sidebar.sidebar-collapsed {
    padding-left: calc(var(--sidebar-w-collapsed) + 0.5rem);
}

/* Content area: ขยายเต็ม และมี padding ที่ responsive */
#page-content {
    width: 100%;
    overflow-x: hidden;
}

#page-content>.container-fluid {
    max-width: 100%;
    padding-left: 1rem;
    padding-right: 1rem;
}

@media (min-width: 768px) {
    #page-content>.container-fluid {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }
}

@media (min-width: 1200px) {
    #page-content>.container-fluid {
        padding-left: 2rem;
        padding-right: 2rem;
    }
}

/* Footer เต็มจอเสมอ */
#main-footer {
    width: 100%;
    margin-top: auto;
}

/* ป้องกัน horizontal scroll บนมือถือ */
* {
    box-sizing: border-box;
}

html,
body {
    overflow-x: hidden;
    width: 100%;
}

/* 📱 มือถือ: sidebar ซ่อน กดปุ่มถึงเลื่อนออกมา */
@media (max-width: 767px) {
    .app-sidebar {
        transform: translateX(-100%);
        transition: transform 0.25s ease, width 0.25s ease;
        width: var(--sidebar-w) !important;
    }

    .app-sidebar.mobile-open {
        transform: translateX(0);
    }

    .sidebar-page-wrapper,
    .sidebar-page-wrapper.collapsed {
        margin-left: 0 !important;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.4);
        z-index: 1039;
    }

    .sidebar-overlay.active {
        display: block;
    }
}

/* ========================================= */
/* 🏆 Certificate Download Button */
/* ========================================= */
.btn-certificate {
    display: inline-block;
    background: linear-gradient(135deg, #f5c518 0%, #e8a900 50%, #c8860a 100%);
    color: #3d2b00 !important;
    font-weight: 700;
    font-size: 0.8rem;
    border: none;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
    box-shadow: 0 3px 10px rgba(200, 134, 10, 0.4);
}

.btn-certificate:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(200, 134, 10, 0.5);
    filter: brightness(1.08);
    color: #3d2b00 !important;
    text-decoration: none;
}

.btn-certificate:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(200, 134, 10, 0.4);
}