/* ===============================================
    1. VARIABLES & THEMES
   =============================================== */

/* --- Light Theme (Default) --- */
:root {
    --color-primary: #6a5af9;
    --color-primary-gradient: linear-gradient(45deg, #6a5af9, #d667cd);
    --color-success: #28a745;
    --color-danger: #dc3545;
    --color-background: #f0f2f5;      /* พื้นหลังหลัก (เทาอ่อน) */
    --color-surface: #ffffff;         /* สีของ Card, Navbar (ขาว) */
    --color-text-primary: #2c2c2c;     /* สีตัวหนังสือหลัก (ดำ) */
    --color-text-secondary: #777;      /* สีตัวหนังสือรอง (เทา) */
    --color-border: #e0e0e0;           /* สีเส้นขอบ */
    --shadow-color: rgba(0, 0, 0, 0.1);
    --welcome-gradient: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
    --login-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-text: #ffffff;
    --glass-text-muted: rgba(255, 255, 255, 0.8);
}

/* --- Dark Theme --- */
html.dark-theme {
    --color-primary: #7a7a7a;
    --color-primary-gradient: linear-gradient(45deg, #4a4a4a, #7a7a7a);
    --color-background: #1f1f1f;      /* พื้นหลังหลัก (เทาดำ) */
    --color-surface: #2c2c2c;         /* สีของ Card, Navbar (เทาเข้ม) */
    --color-text-primary: #ffffff;     /* สีตัวหนังสือหลัก (ขาว) */
    --color-text-secondary: #bbbbbb;   /* สีตัวหนังสือรอง (เทาอ่อน) */
    --color-border: #444444;           /* สีเส้นขอบ */
    --shadow-color: rgba(0, 0, 0, 0.3);
    --welcome-gradient: linear-gradient(-45deg, #333333, #555555, #333333, #666666);
    --login-gradient: linear-gradient(135deg, #444444 0%, #666666 100%);
    --glass-bg: rgba(0, 0, 0, 0.2);
    --glass-border: rgba(255, 255, 255, 0.15);
}


/* ===============================================
    2. BASE & RESET STYLES
   =============================================== */
*,
*::before,
*::after {
    box-sizing: border-box; /* NEW: Universal Box Sizing */
}

html {
    overflow-y: scroll;
    color-scheme: light dark;
}

body {
    font-family: 'Kanit', sans-serif;
    font-size: 16px;
    margin: 0;
    background-color: var(--color-background);
    color: var(--color-text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

h1, h2, h3, h4, h5, h6 {
    margin: 0 0 1rem 0;
    font-weight: 700;
}

hr.separator {
    border: 0;
    height: 1px;
    background-image: linear-gradient(to right, rgba(0, 0, 0, 0), var(--shadow-color), rgba(0, 0, 0, 0));
    margin: 30px 0;
}


/* ===============================================
    3. LAYOUT & COMPONENTS
   =============================================== */

/* --- Navbar --- */
.navbar {
    background-color: var(--color-surface);
    box-shadow: 0 2px 4px var(--shadow-color);
    padding: 0 2rem;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    transition: background-color 0.3s ease;
}
.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    height: 60px;
}
.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
}
.navbar-menu {
    display: flex;
    align-items: center;
    gap: 10px;
}
.dashboard-body {
    padding-top: 80px;
    padding-bottom: 30px;
}
.dashboard-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- Theme Toggle Button --- */
.theme-toggle-btn {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px 12px;
    border-radius: 6px;
    transition: background-color 0.2s, color 0.2s;
}
.theme-toggle-btn:hover {
    background-color: var(--color-background);
    color: var(--color-text-primary);
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 12px 20px;
    border: none;
    border-radius: 5px;
    color: #ffffff;
    font-size: 18px;
    font-family: 'Kanit', sans-serif;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}
.btn:hover {
    transform: translateY(-3px);
}
.btn--primary {
    background: var(--color-primary-gradient);
}
.btn--primary:hover {
    box-shadow: 0 10px 25px var(--shadow-color);
}
.btn--secondary {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}
.btn--secondary:hover {
    box-shadow: 0 6px 12px var(--shadow-color);
}
.btn--danger {
    background: var(--color-danger);
}

/* --- Dropdown Menu --- */
.dropdown {
    position: relative;
    display: inline-block;
}
.dropdown-btn {
    background-color: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    font-size: 16px;
    font-family: 'Kanit', sans-serif;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}
.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    top: 100%;
    background-color: var(--color-surface);
    min-width: 200px;
    box-shadow: 0px 8px 24px 0px var(--shadow-color);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    z-index: 10;
    overflow: hidden;
    padding: 8px 0;
}
.dropdown:hover .dropdown-content {
    display: block;
}
.dropdown-content a {
    color: var(--color-text-primary);
    padding: 12px 16px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: background-color 0.2s;
}
.dropdown-content a:hover {
    background-color: var(--color-background);
}
.dropdown-content a i {
    color: var(--color-text-secondary);
    width: 20px;
    text-align: center;
}

/* --- Tables (General & Upgraded Log Table) --- */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    margin-top: 20px;
    box-shadow: 0 4px 15px var(--shadow-color);
}
.data-table, .log-table {
    width: 100%;
    border-collapse: collapse;
}
.data-table th, .data-table td, .log-table th, .log-table td {
    padding: 12px 15px;
    text-align: left;
    vertical-align: middle;
}
.log-table th, .log-table td {
    padding: 16px 20px;
}
.log-table thead th {
    background-color: var(--color-surface);
    color: var(--color-text-secondary);
    font-weight: 600;
    border-bottom: 1px solid var(--color-border);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.log-table tbody td {
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
    transition: background-color 0.2s ease;
}
.log-table tbody tr:last-child td {
    border-bottom: none;
}
.log-table tbody td.log-message-cell {
    color: var(--color-text-primary);
    font-weight: 500;
}
.log-table tbody tr:hover {
    background-color: var(--color-background);
    transform: scale(1.015);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    position: relative;
    z-index: 2;
}
.log-table .icon-cell {
    width: 40px;
    text-align: center;
    font-size: 1.1rem;
}
.timestamp-cell, .ip-cell {
    white-space: nowrap;
}
html.dark-theme .log-table tbody tr:hover {
     background-color: rgba(255, 255, 255, 0.05);
}

/* --- Status Badge Styles --- */
.log-badge {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.badge-success { color: #1a6438; background-color: rgba(40, 167, 69, 0.15); }
.badge-danger { color: #8f2a36; background-color: rgba(220, 53, 69, 0.15); }
.badge-admin { color: #4a3eb9; background-color: rgba(106, 90, 249, 0.15); }
.badge-user { color: #555c65; background-color: rgba(134, 142, 150, 0.15); }
html.dark-theme .badge-success { color: #75f0a5; background-color: rgba(40, 167, 69, 0.3); }
html.dark-theme .badge-danger  { color: #f79ea8; background-color: rgba(220, 53, 69, 0.3); }
html.dark-theme .badge-admin   { color: #ada4ff; background-color: rgba(106, 90, 249, 0.3); }
html.dark-theme .badge-user    { color: #adb5bd; background-color: rgba(134, 142, 150, 0.3); }


/* ===============================================
    4. PAGE-SPECIFIC STYLES
   =============================================== */

/* --- Welcome Page (Index) --- */
.welcome-body {
    background: var(--welcome-gradient);
    background-size: 400% 400%;
    animation: gradient-animation 15s ease infinite;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}
@keyframes gradient-animation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}
.welcome-container {
    text-align: center;
    padding: 50px;
    background: var(--glass-bg);
    border-radius: 15px;
    box-shadow: 0 8px 32px 0 var(--shadow-color);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border: 1px solid var(--glass-border);
}
.welcome-container h1 { color: var(--glass-text); }
.welcome-container p { color: var(--glass-text-muted); }
.welcome-buttons { margin-top: 30px; display: flex; gap: 20px; justify-content: center; }
.welcome-buttons .btn { width: 150px; }

/* --- Login & Register Page --- */
.login-body {
    background: var(--login-gradient);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}
.login-container {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px 0 var(--shadow-color);
    padding: 40px 50px;
    border-radius: 15px;
    width: 100%;
    max-width: 400px;
    text-align: center;
}
.login-container h2 { color: var(--glass-text); }
.login-container .input-group { position: relative; margin-bottom: 40px; }
.login-container .input-group i { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); color: var(--glass-text-muted); transition: color 0.3s; }
.login-container .input-group #togglePassword { left: auto; right: 10px; cursor: pointer; }
.login-container .input-group input { width: 100%; padding: 10px 40px; font-size: 16px; color: var(--glass-text); border: none; border-bottom: 2px solid var(--glass-border); outline: none; background: transparent; }
.login-container .input-group input:-webkit-autofill,
.login-container .input-group input:-webkit-autofill:hover,
.login-container .input-group input:-webkit-autofill:focus,
.login-container .input-group input:-webkit-autofill:active { -webkit-text-fill-color: var(--glass-text) !important; box-shadow: 0 0 0 1000px rgba(0, 0, 0, 0.2) inset !important; transition: background-color 5000s ease-in-out 0s; }
.login-container .input-group label { position: absolute; top: 10px; left: 40px; font-size: 16px; color: var(--glass-text-muted); pointer-events: none; transition: 0.3s; }
.login-container .input-group input:focus ~ label,
.login-container .input-group input:valid ~ label { top: -20px; left: 40px; color: var(--glass-text); font-size: 12px; }
.login-container .input-group input:focus { border-bottom-color: var(--glass-text); }
.login-container .input-group input:focus + i,
.login-container .input-group input:focus ~ #togglePassword { color: var(--glass-text); }
.login-container .btn { width: 100%; margin-top: 10px; }
.login-container .bottom-text { margin-top: 25px; color: var(--glass-text-muted); font-size: 14px; }
.login-container .bottom-text a { color: var(--glass-text); font-weight: bold; border-bottom: 1px dotted var(--glass-text); }
.login-container .error, .login-container .error-text { color: #ffcdd2; font-size: 12px; }
.login-container .error { background: rgba(220, 53, 69, 0.8); padding: 10px; border-radius: 5px; margin-bottom: 20px; border: 1px solid rgba(255, 255, 255, 0.4); }
.login-container .error-text { text-align: left; display: block; margin-top: 5px; position: absolute; bottom: -22px; left: 0; width: 100%; }

/* --- Dashboard Page --- */
.program-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}
.card-box {
    background-color: var(--color-surface);
    border-radius: 10px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 4px 15px var(--shadow-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
}
.card-box:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 25px var(--shadow-color);
}
.card-box i {
    font-size: 3rem;
    background: var(--color-primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 15px;
}
.card-box h3 {
    margin-bottom: 10px;
    color: var(--color-text-primary);
}
.card-box p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* --- Settings Page --- */
.settings-wrapper {
    display: flex;
    gap: 30px;
    align-items: flex-start;
}
.settings-sidebar {
    width: 250px;
    flex-shrink: 0;
    background-color: var(--color-surface);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
}
.settings-sidebar h3 {
    font-size: 1.1rem;
    padding-bottom: 10px;
    margin-bottom: 10px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 10px;
}
.settings-sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.settings-sidebar ul li a {
    display: block;
    padding: 12px 15px;
    border-radius: 6px;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: background-color 0.2s, color 0.2s;
    margin-bottom: 5px;
}
.settings-sidebar ul li a:hover {
    background-color: var(--color-background);
    color: var(--color-text-primary);
}
.settings-sidebar ul li a.active {
    background: var(--color-primary-gradient);
    color: #ffffff;
    font-weight: bold;
}
.settings-content {
    flex-grow: 1;
    background-color: var(--color-surface);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

/* --- Filter Form & Pagination --- */
.filter-form {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    margin-bottom: 20px;
    background-color: var(--color-background);
    border-radius: 8px;
    flex-wrap: wrap;
}
.filter-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}
.filter-group label {
    font-weight: 600;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}
.filter-form input[type="date"],
.filter-form input[type="time"],
.filter-form select {
    padding: 8px 10px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    font-family: 'Kanit', sans-serif;
    font-size: 0.9rem;
}
.filter-form .btn-group {
    display: flex;
    align-self: flex-end;
    gap: 10px;
}
.filter-form .btn {
    padding: 8px 15px;
    font-size: 16px;
}
.pagination {
    margin-top: 25px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 5px;
}
.pagination a {
    color: var(--color-primary);
    padding: 8px 14px;
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    transition: background-color 0.2s, color 0.2s;
}
.pagination a:hover {
    background-color: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
}
.pagination a.active {
    background: var(--color-primary-gradient);
    color: #ffffff;
    border-color: var(--color-primary);
    cursor: default;
}


/* ===============================================
    5. RESPONSIVE STYLES (MEDIA QUERIES)
   =============================================== */
@media (max-width: 768px) {
    .dashboard-body {
        padding-top: 70px;
    }
    .navbar {
        padding: 0 1rem;
    }
    .settings-wrapper {
        flex-direction: column;
    }
    .settings-sidebar {
        width: 100%;
    }
    .login-container {
        padding: 30px 25px;
    }
}

/* --- User Profile Page Styles --- */
.profile-container {
    display: grid;
    grid-template-columns: 1fr; /* 1 คอลัมน์ */
    gap: 40px;
}

.profile-info, .profile-form-container {
    background-color: var(--color-background);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.profile-info h3, .profile-form-container h3 {
    margin-top: 0;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 15px;
    margin-bottom: 20px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 1.1rem;
}

.info-item i {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.info-item .label {
    font-weight: 600;
    color: var(--color-text-primary);
}

.info-item .value {
    color: var(--color-text-secondary);
}

/* --- Form Styles --- */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
}

.form-group input[type="password"] {
    width: 100%;
    max-width: 400px; /* จำกัดความกว้างของ input */
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    font-size: 1rem;
}

/* --- Alert Messages --- */
.alert {
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-weight: 500;
    border: 1px solid transparent;
}
.alert-success {
    color: #1a6438;
    background-color: #d1e7dd;
    border-color: #a3cfbb;
}
.alert-danger {
    color: #8f2a36;
    background-color: #f8d7da;
    border-color: #f1aeb5;
}
html.dark-theme .alert-success { color: #75f0a5; background-color: rgba(40, 167, 69, 0.3); border-color: rgba(40, 167, 69, 0.5); }
html.dark-theme .alert-danger  { color: #f79ea8; background-color: rgba(220, 53, 69, 0.3); border-color: rgba(220, 53, 69, 0.5); }

.filter-form input[type="text"] {
    padding: 8px 10px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    font-family: 'Kanit', sans-serif;
    font-size: 0.9rem;
}

/* --- User Profile Page Styles (Upgraded) --- */

/* ทำให้ Grid แสดงผลได้ดีขึ้นเมื่อมีข้อมูลเยอะ */
.info-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); /* ปรับขนาดขั้นต่ำ */
}

/* ทำให้ input และ textarea มีหน้าตาเหมือนกัน */
.form-group input[type="password"],
.form-group input[type="text"],
.form-group input[type="date"],
.form-group input[type="tel"],
.form-group textarea {
    width: 100%;
    max-width: 400px;
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    font-size: 1rem;
    font-family: 'Kanit', sans-serif;
}

.form-group textarea {
    min-height: 120px; /* กำหนดความสูงเริ่มต้นให้ textarea */
    resize: vertical; /* อนุญาตให้ปรับขนาดแค่แนวตั้ง */
}

/* --- Collapsible/Accordion Styles --- */
.collapsible-section {
    margin-bottom: 20px;
}

.collapsible-trigger {
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    cursor: pointer;
    padding: 18px 25px;
    width: 100%;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    text-align: left;
    outline: none;
    font-size: 1.1rem;
    font-weight: 700;
    font-family: 'Kanit', sans-serif;
    transition: background-color 0.3s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.collapsible-trigger:hover {
    background-color: var(--color-background);
}

.collapsible-trigger .trigger-icon {
    transition: transform 0.3s ease;
}

.collapsible-trigger.active .trigger-icon {
    transform: rotate(90deg);
}

.collapsible-content {
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    background-color: transparent;
}

/* --- Alert Messages (Upgraded) --- */
.alert {
    padding: 15px 40px 15px 20px; /* เพิ่ม padding ขวาสำหรับปุ่มปิด */
    border-radius: 6px;
    margin-bottom: 20px;
    font-weight: 500;
    border: 1px solid transparent;
    position: relative;
    opacity: 1;
    transition: opacity 0.5s ease;
}

/* คลาสสำหรับซ่อน Alert ตอนกดปิด */
.alert.fade-out {
    opacity: 0;
}

.alert-success {
    color: #1a6438;
    background-color: #d1e7dd;
    border-color: #a3cfbb;
}
.alert-danger {
    color: #8f2a36;
    background-color: #f8d7da;
    border-color: #f1aeb5;
}
html.dark-theme .alert-success { color: #75f0a5; background-color: rgba(40, 167, 69, 0.3); border-color: rgba(40, 167, 69, 0.5); }
html.dark-theme .alert-danger  { color: #f79ea8; background-color: rgba(220, 53, 69, 0.3); border-color: rgba(220, 53, 69, 0.5); }

/* ปุ่มปิด (กากบาท) */
.close-btn {
    position: absolute;
    top: 50%;
    right: 15px;
    transform: translateY(-50%);
    background: none;
    border: none;
    font-size: 1.5rem;
    font-weight: bold;
    color: inherit; /* ใช้สีเดียวกับข้อความ */
    opacity: 0.6;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}
.close-btn:hover {
    opacity: 1;
}

/* --- Status Page Styles (No JS) --- */
.status-page-body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: var(--color-background);
    font-family: 'Kanit', sans-serif;
    margin: 0;
}

.status-container {
    text-align: center;
    padding: 40px 50px;
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    border-radius: 12px;
    box-shadow: 0 8px 30px var(--shadow-color);
    border-top: 5px solid;
}

.status-container i {
    font-size: 4rem;
    margin-bottom: 20px;
}

.status-container h2 {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.status-container p {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
}

/* --- Status Colors --- */
.status-container.status-success {
    border-color: var(--color-success);
}
.status-container.status-success i {
    color: var(--color-success);
}

.status-container.status-error {
    border-color: var(--color-danger);
}
.status-container.status-error i {
    color: var(--color-danger);
}