/* ═══════════════════════════════════════════════════════════════════════════
   base.css — ชั้นพื้นฐานของระบบ MIS โรงเรียนวัดมะกับตองหลวง
   ---------------------------------------------------------------------------
   ไฟล์นี้ใช้แทน bootstrap.min.css ทั้งหมด
   ให้เฉพาะคลาสที่โปรเจกต์ใช้จริง (245 คลาส) ไม่มีส่วนเกิน

   หน้าตาของคอมโพเนนต์ (ปุ่ม/การ์ด/ฟอร์ม/ตาราง ฯลฯ) ปรับต่อใน preline-theme.css
   ที่โหลดทีหลัง — ไฟล์นี้รับผิดชอบ "โครงสร้าง" เป็นหลัก

   สารบัญ
     1. ตัวแปรและ reboot
     2. ระบบคอลัมน์ (grid)
     3. ระยะห่าง (margin / padding)
     4. การแสดงผลและ flexbox
     5. ตัวอักษร
     6. สีพื้นหลัง / สีตัวอักษร
     7. เส้นขอบ / มุมโค้ง / เงา
     8. ขนาดและตำแหน่ง
     9. ปุ่ม
    10. ฟอร์ม
    11. ตาราง
    12. การ์ด
    13. แท็บและเมนู
    14. dropdown
    15. modal / toast
    16. ป้าย (badge) / breadcrumb / progress / spinner
    17. เบ็ดเตล็ด
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── 1. ตัวแปรและ reboot ─────────────────────────────────────────────────── */
:root {
    --gutter-x: 1.5rem;
    --gutter-y: 0;
    --body-color: #212529;
    --body-bg: #fff;
    --border-color: #dee2e6;
    --border-radius: .375rem;
    --muted-color: #6c757d;

    /* สีความหมาย — ให้ค่าเริ่มต้นไว้ ธีมสีจะเขียนทับ --primary-color อีกที */
    --c-success: #198754;
    --c-danger:  #dc3545;
    --c-warning: #ffc107;
    --c-info:    #0dcaf0;
    --c-light:   #f8f9fa;
    --c-dark:    #212529;
}

*, *::before, *::after { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'IBM Plex Sans Thai Looped', 'Sarabun', system-ui, -apple-system, 'Segoe UI', sans-serif;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--body-color);
    background-color: var(--body-bg);
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

h1, h2, h3, h4, h5, h6,
.h3, .h4 { margin-top: 0; margin-bottom: .5rem; font-weight: 500; line-height: 1.2; }
h1 { font-size: calc(1.375rem + 1.5vw); }
h2 { font-size: calc(1.325rem + .9vw); }
h3, .h3 { font-size: calc(1.3rem + .6vw); }
h4, .h4 { font-size: calc(1.275rem + .3vw); }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }
@media (min-width: 1200px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3, .h3 { font-size: 1.75rem; }
    h4, .h4 { font-size: 1.5rem; }
}

p { margin-top: 0; margin-bottom: 1rem; }
ul, ol { margin-top: 0; margin-bottom: 1rem; padding-left: 2rem; }
ul ul, ol ul, ul ol, ol ol { margin-bottom: 0; }
dl, dd { margin-bottom: .5rem; }
dt { font-weight: 700; }
dd { margin-left: 0; }

hr {
    margin: 1rem 0; color: inherit; border: 0;
    border-top: var(--border-width, 1px) solid; opacity: .25;
}

abbr[title] { text-decoration: underline dotted; cursor: help; }
strong, b { font-weight: bolder; }
small, .small { font-size: .875em; }
sub, sup { position: relative; font-size: .75em; line-height: 0; vertical-align: baseline; }
sub { bottom: -.25em; }
sup { top: -.5em; }

a { color: var(--primary-color, #0d6efd); text-decoration: underline; }
a:hover { color: #ffcb00; }
a:not([href]):not([class]), a:not([href]):not([class]):hover { color: inherit; text-decoration: none; }

pre, code, kbd, samp {
    font-family: SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 1em;
}
pre { display: block; margin-top: 0; margin-bottom: 1rem; overflow: auto; font-size: .875em; }
code { font-size: .875em; color: #d63384; word-wrap: break-word; }
a > code { color: inherit; }

img, svg { vertical-align: middle; }

table { caption-side: bottom; border-collapse: collapse; }
th { text-align: inherit; text-align: -webkit-match-parent; }
thead, tbody, tfoot, tr, td, th { border-color: inherit; border-style: solid; border-width: 0; }

label { display: inline-block; }
button { border-radius: 0; }
button:focus:not(:focus-visible) { outline: 0; }
input, button, select, optgroup, textarea {
    margin: 0; font-family: inherit; font-size: inherit; line-height: inherit;
}
button, select { text-transform: none; }
select { word-wrap: normal; }
select:disabled { opacity: 1; }
button, [type="button"], [type="reset"], [type="submit"] { -webkit-appearance: button; }
button:not(:disabled), [type="button"]:not(:disabled),
[type="reset"]:not(:disabled), [type="submit"]:not(:disabled) { cursor: pointer; }
::-moz-focus-inner { padding: 0; border-style: none; }
textarea { resize: vertical; }
fieldset { min-width: 0; padding: 0; margin: 0; border: 0; }
legend {
    float: left; width: 100%; padding: 0; margin-bottom: .5rem;
    font-size: calc(1.275rem + .3vw); line-height: inherit;
}
legend + * { clear: left; }
[type="search"] { outline-offset: -2px; -webkit-appearance: textfield; }
::-webkit-datetime-edit-fields-wrapper, ::-webkit-datetime-edit-text,
::-webkit-datetime-edit-minute, ::-webkit-datetime-edit-hour-field,
::-webkit-datetime-edit-day-field, ::-webkit-datetime-edit-month-field,
::-webkit-datetime-edit-year-field { padding: 0; }
::-webkit-inner-spin-button { height: auto; }
::-webkit-search-decoration { -webkit-appearance: none; }
::-webkit-color-swatch-wrapper { padding: 0; }
::file-selector-button { font: inherit; -webkit-appearance: button; }
iframe { border: 0; }
summary { display: list-item; cursor: pointer; }
[hidden] { display: none !important; }

/* ── 2. ระบบคอลัมน์ ──────────────────────────────────────────────────────── */
.container-fluid {
    width: 100%;
    padding-right: calc(var(--gutter-x) * .5);
    padding-left: calc(var(--gutter-x) * .5);
    margin-right: auto;
    margin-left: auto;
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin-top: calc(-1 * var(--gutter-y));
    margin-right: calc(-.5 * var(--gutter-x));
    margin-left: calc(-.5 * var(--gutter-x));
}
.row > * {
    flex-shrink: 0;
    width: 100%;
    max-width: 100%;
    padding-right: calc(var(--gutter-x) * .5);
    padding-left: calc(var(--gutter-x) * .5);
    margin-top: var(--gutter-y);
}

.col-6  { flex: 0 0 auto; width: 50%; }

.g-2 { --gutter-x: .5rem;  --gutter-y: .5rem; }
.g-3 { --gutter-x: 1rem;   --gutter-y: 1rem; }
.g-4 { --gutter-x: 1.5rem; --gutter-y: 1.5rem; }

@media (min-width: 768px) {
    .col-md-2  { flex: 0 0 auto; width: 16.66666667%; }
    .col-md-3  { flex: 0 0 auto; width: 25%; }
    .col-md-4  { flex: 0 0 auto; width: 33.33333333%; }
    .col-md-5  { flex: 0 0 auto; width: 41.66666667%; }
    .col-md-6  { flex: 0 0 auto; width: 50%; }
    .col-md-7  { flex: 0 0 auto; width: 58.33333333%; }
    .col-md-8  { flex: 0 0 auto; width: 66.66666667%; }
    .col-md-12 { flex: 0 0 auto; width: 100%; }
}
@media (min-width: 992px) {
    .col-lg-3 { flex: 0 0 auto; width: 25%; }
    .col-lg-4 { flex: 0 0 auto; width: 33.33333333%; }
    .col-lg-8 { flex: 0 0 auto; width: 66.66666667%; }
    .col-lg-9 { flex: 0 0 auto; width: 75%; }
}
@media (min-width: 1200px) {
    .col-xl-3 { flex: 0 0 auto; width: 25%; }
}

/* ── 3. ระยะห่าง ─────────────────────────────────────────────────────────── */
.m-0 { margin: 0 !important; }
.m-auto { margin: auto !important; }
.mx-1   { margin-right: .25rem !important; margin-left: .25rem !important; }
.mx-auto{ margin-right: auto !important;   margin-left: auto !important; }
.my-3   { margin-top: 1rem !important;     margin-bottom: 1rem !important; }
.my-4   { margin-top: 1.5rem !important;   margin-bottom: 1.5rem !important; }
.mt-1 { margin-top: .25rem !important; }
.mt-2 { margin-top: .5rem !important; }
.mt-3 { margin-top: 1rem !important; }
.mt-4 { margin-top: 1.5rem !important; }
.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: .25rem !important; }
.mb-2 { margin-bottom: .5rem !important; }
.mb-3 { margin-bottom: 1rem !important; }
.mb-4 { margin-bottom: 1.5rem !important; }
.mb-5 { margin-bottom: 3rem !important; }
.ms-1 { margin-left: .25rem !important; }
.ms-3 { margin-left: 1rem !important; }
.ms-auto { margin-left: auto !important; }
.me-1 { margin-right: .25rem !important; }
.me-2 { margin-right: .5rem !important; }
.me-3 { margin-right: 1rem !important; }
.me-auto { margin-right: auto !important; }
@media (min-width: 576px) { .mt-sm-0 { margin-top: 0 !important; } }

.p-0 { padding: 0 !important; }
.p-1 { padding: .25rem !important; }
.p-2 { padding: .5rem !important; }
.p-3 { padding: 1rem !important; }
.p-4 { padding: 1.5rem !important; }
.px-0 { padding-right: 0 !important;       padding-left: 0 !important; }
.px-1 { padding-right: .25rem !important;  padding-left: .25rem !important; }
.px-3 { padding-right: 1rem !important;    padding-left: 1rem !important; }
.px-4 { padding-right: 1.5rem !important;  padding-left: 1.5rem !important; }
.px-5 { padding-right: 3rem !important;    padding-left: 3rem !important; }
.py-0 { padding-top: 0 !important;         padding-bottom: 0 !important; }
.py-1 { padding-top: .25rem !important;    padding-bottom: .25rem !important; }
.py-2 { padding-top: .5rem !important;     padding-bottom: .5rem !important; }
.py-3 { padding-top: 1rem !important;      padding-bottom: 1rem !important; }
.py-4 { padding-top: 1.5rem !important;    padding-bottom: 1.5rem !important; }
.py-5 { padding-top: 3rem !important;      padding-bottom: 3rem !important; }
.pt-0 { padding-top: 0 !important; }
.pt-2 { padding-top: .5rem !important; }
.pt-3 { padding-top: 1rem !important; }
.pb-2 { padding-bottom: .5rem !important; }
.pb-3 { padding-bottom: 1rem !important; }
.pb-4 { padding-bottom: 1.5rem !important; }
.pb-5 { padding-bottom: 3rem !important; }
.ps-1 { padding-left: .25rem !important; }
.ps-3 { padding-left: 1rem !important; }
.pe-2 { padding-right: .5rem !important; }
.pe-3 { padding-right: 1rem !important; }

.gap-1 { gap: .25rem !important; }
.gap-2 { gap: .5rem !important; }
.gap-3 { gap: 1rem !important; }

/* ── 4. การแสดงผลและ flexbox ────────────────────────────────────────────── */
.d-none          { display: none !important; }
.d-inline        { display: inline !important; }
.d-inline-block  { display: inline-block !important; }
.d-block         { display: block !important; }
.d-flex          { display: flex !important; }
@media (min-width: 576px) {
    .d-sm-flex         { display: flex !important; }
    .d-sm-inline-block { display: inline-block !important; }
}
@media (min-width: 768px) {
    .d-md-none   { display: none !important; }
    .d-md-inline { display: inline !important; }
}

.flex-row      { flex-direction: row !important; }
.flex-column   { flex-direction: column !important; }
.flex-wrap     { flex-wrap: wrap !important; }
.flex-fill     { flex: 1 1 auto !important; }
.flex-grow-1   { flex-grow: 1 !important; }

.justify-content-center  { justify-content: center !important; }
.justify-content-between { justify-content: space-between !important; }
.justify-content-end     { justify-content: flex-end !important; }

.align-items-start   { align-items: flex-start !important; }
.align-items-center  { align-items: center !important; }
.align-items-end     { align-items: flex-end !important; }
.align-items-stretch { align-items: stretch !important; }

.align-top    { vertical-align: top !important; }
.align-middle { vertical-align: middle !important; }

/* ── 5. ตัวอักษร ─────────────────────────────────────────────────────────── */
.fs-1 { font-size: calc(1.375rem + 1.5vw) !important; }
.fs-3 { font-size: calc(1.3rem + .6vw) !important; }
.fs-4 { font-size: calc(1.275rem + .3vw) !important; }
.fs-5 { font-size: 1.25rem !important; }
.fs-6 { font-size: 1rem !important; }
@media (min-width: 1200px) {
    .fs-1 { font-size: 2.5rem !important; }
    .fs-3 { font-size: 1.75rem !important; }
    .fs-4 { font-size: 1.5rem !important; }
}

.fw-normal   { font-weight: 400 !important; }
.fw-semibold { font-weight: 600 !important; }
.fw-bold     { font-weight: 700 !important; }
.fst-italic  { font-style: italic !important; }
.font-monospace { font-family: SFMono-Regular, Menlo, Monaco, Consolas, monospace !important; }

.text-start  { text-align: left !important; }
.text-center { text-align: center !important; }
.text-end    { text-align: right !important; }

.text-nowrap { white-space: nowrap !important; }
.text-truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.text-decoration-none { text-decoration: none !important; }

/* ── 6. สีพื้นหลัง / สีตัวอักษร ─────────────────────────────────────────── */
.text-primary   { color: var(--primary-color) !important; }
.text-secondary { color: var(--muted-color) !important; }
.text-success   { color: var(--c-success) !important; }
.text-danger    { color: var(--c-danger) !important; }
.text-warning   { color: var(--c-warning) !important; }
.text-info      { color: var(--c-info) !important; }
.text-light     { color: var(--c-light) !important; }
.text-dark      { color: var(--c-dark) !important; }
.text-white     { color: #fff !important; }
.text-muted     { color: var(--muted-color) !important; }
.text-white-50  { color: rgba(255, 255, 255, .5) !important; }
.text-warning-emphasis { color: #664d03 !important; }

.bg-primary   { background-color: var(--primary-color) !important; }
.bg-secondary { background-color: var(--muted-color) !important; }
.bg-success   { background-color: var(--c-success) !important; }
.bg-danger    { background-color: var(--c-danger) !important; }
.bg-warning   { background-color: var(--c-warning) !important; }
.bg-info      { background-color: var(--c-info) !important; }
.bg-light     { background-color: var(--c-light) !important; }
.bg-dark      { background-color: var(--c-dark) !important; }
.bg-white     { background-color: #fff !important; }

/* .bg-opacity-10 ใช้คู่กับ .bg-* — ทำงานผ่าน color-mix ให้ได้ผลเหมือน rgba */
.bg-opacity-10.bg-primary { background-color: color-mix(in srgb, var(--primary-color) 10%, transparent) !important; }
.bg-opacity-10.bg-success { background-color: color-mix(in srgb, var(--c-success) 10%, transparent) !important; }
.bg-opacity-10.bg-danger  { background-color: color-mix(in srgb, var(--c-danger)  10%, transparent) !important; }
.bg-opacity-10.bg-warning { background-color: color-mix(in srgb, var(--c-warning) 10%, transparent) !important; }
.bg-opacity-10.bg-info    { background-color: color-mix(in srgb, var(--c-info)    10%, transparent) !important; }
.bg-opacity-10.bg-dark    { background-color: color-mix(in srgb, var(--c-dark)    10%, transparent) !important; }

.text-bg-success { color: #fff !important; background-color: var(--c-success) !important; }

/* ── 7. เส้นขอบ / มุมโค้ง / เงา ─────────────────────────────────────────── */
.border           { border: 1px solid var(--border-color) !important; }
.border-0         { border: 0 !important; }
.border-top       { border-top: 1px solid var(--border-color) !important; }
.border-bottom    { border-bottom: 1px solid var(--border-color) !important; }
.border-top-0     { border-top: 0 !important; }
.border-bottom-0  { border-bottom: 0 !important; }
.border-start-0   { border-left: 0 !important; }
.border-end-0     { border-right: 0 !important; }
.border-primary   { border-color: var(--primary-color) !important; }
.border-opacity-50 { border-color: color-mix(in srgb, currentColor 50%, transparent) !important; }

.rounded          { border-radius: var(--border-radius) !important; }
.rounded-circle   { border-radius: 50% !important; }
.rounded-pill     { border-radius: 50rem !important; }
.rounded-bottom   { border-bottom-right-radius: var(--border-radius) !important;
                    border-bottom-left-radius:  var(--border-radius) !important; }
.rounded-top-0    { border-top-left-radius: 0 !important; border-top-right-radius: 0 !important; }

.shadow-sm  { box-shadow: 0 .125rem .25rem rgba(0, 0, 0, .075) !important; }
.opacity-25 { opacity: .25 !important; }

/* ── 8. ขนาดและตำแหน่ง ──────────────────────────────────────────────────── */
.w-100 { width: 100% !important; }
.h-100 { height: 100% !important; }

.position-relative { position: relative !important; }
.position-fixed    { position: fixed !important; }
.bottom-0 { bottom: 0 !important; }
.end-0    { right: 0 !important; }

/* ── 9. ปุ่ม ─────────────────────────────────────────────────────────────── */
.btn {
    --btn-color: var(--body-color);
    --btn-bg: transparent;
    --btn-border-color: transparent;
    --btn-hover-color: var(--btn-color);
    --btn-hover-bg: var(--btn-bg);
    --btn-hover-border-color: var(--btn-border-color);

    display: inline-block;
    padding: .375rem .75rem;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--btn-color);
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    background-color: var(--btn-bg);
    border: 1px solid var(--btn-border-color);
    border-radius: var(--border-radius);
    transition: color .15s ease-in-out, background-color .15s ease-in-out,
                border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}
.btn:hover {
    color: var(--btn-hover-color);
    background-color: var(--btn-hover-bg);
    border-color: var(--btn-hover-border-color);
}
.btn:disabled, .btn.disabled, fieldset:disabled .btn {
    pointer-events: none; opacity: .65;
}
.btn-sm { padding: .25rem .5rem; font-size: .875rem; border-radius: .25rem; }

/* ปุ่มสีทึบ */
.btn-primary   { --btn-color:#fff; --btn-bg:var(--primary-color); --btn-border-color:var(--primary-color);
                 --btn-hover-bg:var(--primary-hover); --btn-hover-border-color:var(--primary-hover); --btn-hover-color:#fff; }
.btn-secondary { --btn-color:#fff; --btn-bg:var(--muted-color);   --btn-border-color:var(--muted-color);
                 --btn-hover-bg:#5c636a; --btn-hover-border-color:#565e64; --btn-hover-color:#fff; }
.btn-success   { --btn-color:#fff; --btn-bg:var(--c-success); --btn-border-color:var(--c-success);
                 --btn-hover-bg:#157347; --btn-hover-border-color:#146c43; --btn-hover-color:#fff; }
.btn-warning   { --btn-color:#000; --btn-bg:var(--c-warning); --btn-border-color:var(--c-warning);
                 --btn-hover-bg:#ffca2c; --btn-hover-border-color:#ffc720; --btn-hover-color:#000; }
.btn-info      { --btn-color:#000; --btn-bg:var(--c-info); --btn-border-color:var(--c-info);
                 --btn-hover-bg:#31d2f2; --btn-hover-border-color:#25cff2; --btn-hover-color:#000; }
.btn-light     { --btn-color:#000; --btn-bg:var(--c-light); --btn-border-color:var(--c-light);
                 --btn-hover-bg:#d3d4d5; --btn-hover-border-color:#c6c7c8; --btn-hover-color:#000; }

/* ปุ่มขอบ */
.btn-outline-primary   { --btn-color:var(--primary-color); --btn-border-color:var(--primary-color);
                         --btn-hover-color:#fff; --btn-hover-bg:var(--primary-color); --btn-hover-border-color:var(--primary-color); }
.btn-outline-secondary { --btn-color:var(--muted-color); --btn-border-color:var(--muted-color);
                         --btn-hover-color:#fff; --btn-hover-bg:var(--muted-color); --btn-hover-border-color:var(--muted-color); }
.btn-outline-success   { --btn-color:var(--c-success); --btn-border-color:var(--c-success);
                         --btn-hover-color:#fff; --btn-hover-bg:var(--c-success); --btn-hover-border-color:var(--c-success); }
.btn-outline-danger    { --btn-color:var(--c-danger); --btn-border-color:var(--c-danger);
                         --btn-hover-color:#fff; --btn-hover-bg:var(--c-danger); --btn-hover-border-color:var(--c-danger); }
.btn-outline-warning   { --btn-color:var(--c-warning); --btn-border-color:var(--c-warning);
                         --btn-hover-color:#000; --btn-hover-bg:var(--c-warning); --btn-hover-border-color:var(--c-warning); }
.btn-outline-info      { --btn-color:var(--c-info); --btn-border-color:var(--c-info);
                         --btn-hover-color:#000; --btn-hover-bg:var(--c-info); --btn-hover-border-color:var(--c-info); }

/* checkbox/radio ที่ทำหน้าที่เป็นปุ่ม */
.btn-check { position: absolute; clip: rect(0,0,0,0); pointer-events: none; }
/* ใช้สี hover ของปุ่มตัวนั้นเอง เพื่อให้ btn-outline-success ยังเป็นเขียว ไม่ถูกบังคับเป็นสีหลัก */
.btn-check:checked + .btn {
    color: var(--btn-hover-color);
    background-color: var(--btn-hover-bg);
    border-color: var(--btn-hover-border-color);
}

/* ปุ่มกากบาทปิด */
.btn-close {
    box-sizing: content-box; width: 1em; height: 1em; padding: .25em;
    color: #000; background: transparent
        url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath d='M.293.293a1 1 0 0 1 1.414 0L8 6.586 14.293.293a1 1 0 1 1 1.414 1.414L9.414 8l6.293 6.293a1 1 0 0 1-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 0 1-1.414-1.414L6.586 8 .293 1.707a1 1 0 0 1 0-1.414z'/%3e%3c/svg%3e")
        center/1em auto no-repeat;
    border: 0; border-radius: var(--border-radius); opacity: .5; cursor: pointer;
}
.btn-close:hover { opacity: .75; }
.btn-close-white { filter: invert(1) grayscale(100%) brightness(200%); }

/* ── 10. ฟอร์ม ───────────────────────────────────────────────────────────── */
.form-label { margin-bottom: .5rem; }
.form-text  { margin-top: .25rem; font-size: .875em; color: var(--muted-color); }

.form-control, .form-select {
    display: block; width: 100%;
    padding: .375rem .75rem;
    font-size: 1rem; font-weight: 400; line-height: 1.5;
    color: var(--body-color);
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    appearance: none;
    transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}
.form-select {
    padding-right: 2.25rem;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right .75rem center;
    background-size: 16px 12px;
}
.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 .25rem color-mix(in srgb, var(--primary-color) 25%, transparent);
}
.form-control:disabled, .form-select:disabled { background-color: #e9ecef; opacity: 1; }
.form-control::placeholder { color: var(--muted-color); opacity: 1; }
.form-control[type="file"] { overflow: hidden; }
.form-control::file-selector-button {
    padding: .375rem .75rem; margin: -.375rem -.75rem; margin-inline-end: .75rem;
    color: var(--body-color); background-color: var(--c-light);
    border: 0; border-inline-end: 1px solid var(--border-color); border-radius: 0;
}
textarea.form-control { min-height: calc(1.5em + .75rem + 2px); }

.form-control-sm { min-height: calc(1.5em + .5rem + 2px); padding: .25rem .5rem; font-size: .875rem; border-radius: .25rem; }
.form-select-sm  { padding-top: .25rem; padding-bottom: .25rem; padding-left: .5rem;
                   font-size: .875rem; border-radius: .25rem; }

.form-check { display: block; min-height: 1.5rem; padding-left: 1.5em; margin-bottom: .125rem; }
.form-check .form-check-input { float: left; margin-left: -1.5em; }
.form-check-input {
    --check-bg: #fff;
    width: 1em; height: 1em; margin-top: .25em;
    vertical-align: top;
    background-color: var(--check-bg);
    background-repeat: no-repeat; background-position: center; background-size: contain;
    border: 1px solid rgba(0, 0, 0, .25);
    appearance: none; print-color-adjust: exact;
}
.form-check-input[type="checkbox"] { border-radius: .25em; }
.form-check-input[type="radio"]    { border-radius: 50%; }
.form-check-input:checked {
    background-color: var(--primary-color); border-color: var(--primary-color);
}
.form-check-input:checked[type="checkbox"] {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3e%3cpath fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='m6 10 3 3 6-6'/%3e%3c/svg%3e");
}
.form-check-input:checked[type="radio"] {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='2' fill='%23fff'/%3e%3c/svg%3e");
}
.form-check-input:focus {
    border-color: var(--primary-color); outline: 0;
    box-shadow: 0 0 0 .25rem color-mix(in srgb, var(--primary-color) 25%, transparent);
}
.form-check-input:disabled { pointer-events: none; filter: none; opacity: .5; }
.form-check-label { cursor: pointer; }

.form-switch { padding-left: 2.5em; }
.form-switch .form-check-input {
    width: 2em; margin-left: -2.5em; border-radius: 2em;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='rgba%280,0,0,0.25%29'/%3e%3c/svg%3e");
    background-position: left center;
    transition: background-position .15s ease-in-out;
}
.form-switch .form-check-input:checked {
    background-position: right center;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%23fff'/%3e%3c/svg%3e");
}

.input-group {
    position: relative; display: flex; flex-wrap: wrap;
    align-items: stretch; width: 100%;
}
.input-group > .form-control, .input-group > .form-select {
    position: relative; flex: 1 1 auto; width: 1%; min-width: 0;
}
.input-group > .form-control:focus, .input-group > .form-select:focus { z-index: 5; }
.input-group-text {
    display: flex; align-items: center;
    padding: .375rem .75rem;
    font-size: 1rem; font-weight: 400; line-height: 1.5;
    color: var(--body-color); text-align: center; white-space: nowrap;
    background-color: var(--c-light);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}
.input-group-sm > .form-control, .input-group-sm > .form-select, .input-group-sm > .input-group-text,
.input-group-sm > .btn { padding: .25rem .5rem; font-size: .875rem; border-radius: .25rem; }
/* ต่อขอบให้เนียน: ตัวแรกโค้งซ้าย ตัวสุดท้ายโค้งขวา ที่เหลือตรง */
.input-group > :not(:first-child):not(.dropdown-menu) {
    margin-left: -1px; border-top-left-radius: 0; border-bottom-left-radius: 0;
}
.input-group > :not(:last-child):not(.dropdown-toggle) {
    border-top-right-radius: 0; border-bottom-right-radius: 0;
}

/* ── 11. ตาราง ──────────────────────────────────────────────────────────── */
.table {
    /* พื้นหลังขาวเหมือนเดิม เพื่อไม่ให้สีของกล่องแม่ทะลุขึ้นมาในตาราง
       ส่วนสีตัวอักษรปล่อยให้สืบทอดจากธีม (#1e293b) ไม่บังคับดำสนิทแบบ Bootstrap */
    --table-bg: #fff;
    --table-accent-bg: transparent;
    width: 100%;
    margin-bottom: 1rem;
    vertical-align: top;
    border-color: var(--border-color);
}
.table > :not(caption) > * > * {
    padding: .5rem .5rem;
    background-color: var(--table-bg);
    border-bottom-width: 1px;
    box-shadow: inset 0 0 0 9999px var(--table-accent-bg);
}
.table > tbody { vertical-align: inherit; }
.table > thead { vertical-align: bottom; }

.table-sm > :not(caption) > * > * { padding: .25rem .25rem; }

.table-bordered > :not(caption) > * { border-width: 1px 0; }
.table-bordered > :not(caption) > * > * { border-width: 0 1px; }

.table-borderless > :not(caption) > * > * { border-bottom-width: 0; }
.table-borderless > :not(:first-child) { border-top-width: 0; }

.table-hover > tbody > tr:hover > * {
    --table-accent-bg: rgba(0, 0, 0, .04);
    color: var(--body-color);
}

.table-light   > :not(caption) > * > *, tr.table-light   > * { --table-bg: #f8f9fa; border-color: #c6c7c8; }
.table-info    > :not(caption) > * > *, tr.table-info    > * { --table-bg: #cff4fc; }
.table-warning > :not(caption) > * > *, tr.table-warning > * { --table-bg: #fff3cd; }
thead.table-light > tr > * { --table-bg: #f8f9fa; }

.table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* ── 12. การ์ด ──────────────────────────────────────────────────────────── */
.card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
    word-wrap: break-word;
    background-color: #fff;
    background-clip: border-box;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}
.card > hr { margin-right: 0; margin-left: 0; }
.card-body   { flex: 1 1 auto; padding: 1rem 1rem; }
.card-header {
    padding: .5rem 1rem; margin-bottom: 0;
    background-color: rgba(0, 0, 0, .03);
    border-bottom: 1px solid var(--border-color);
}
.card-header:first-child { border-radius: calc(var(--border-radius) - 1px) calc(var(--border-radius) - 1px) 0 0; }
.card-footer {
    padding: .5rem 1rem;
    background-color: rgba(0, 0, 0, .03);
    border-top: 1px solid var(--border-color);
}
.card-footer:last-child { border-radius: 0 0 calc(var(--border-radius) - 1px) calc(var(--border-radius) - 1px); }

/* ── 13. แท็บและเมนู ────────────────────────────────────────────────────── */
.nav {
    display: flex; flex-wrap: wrap;
    padding-left: 0; margin-bottom: 0; list-style: none;
}
.nav-link {
    display: block;
    padding: .5rem 1rem;
    color: var(--primary-color);
    text-decoration: none;
    background: none; border: 0;
    transition: color .15s ease-in-out, background-color .15s ease-in-out, border-color .15s ease-in-out;
}
.nav-link:hover, .nav-link:focus { color: var(--primary-hover); }
.nav-link.disabled, .nav-link:disabled {
    color: var(--muted-color); pointer-events: none; cursor: default;
}
.nav-tabs { border-bottom: 1px solid var(--border-color); }
.nav-tabs .nav-link {
    margin-bottom: -1px;
    border: 1px solid transparent;
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
}
.nav-tabs .nav-link:hover, .nav-tabs .nav-link:focus {
    isolation: isolate; border-color: #e9ecef #e9ecef var(--border-color);
}
.nav-tabs .nav-link.active, .nav-tabs .nav-item.show .nav-link {
    color: #495057; background-color: #fff;
    border-color: var(--border-color) var(--border-color) #fff;
}

.tab-content > .tab-pane { display: none; }
.tab-content > .active   { display: block; }

/* ── 14. dropdown ───────────────────────────────────────────────────────── */
.dropdown { position: relative; }
.dropdown-menu {
    position: absolute; z-index: 1000;
    display: none;
    min-width: 10rem;
    padding: .5rem 0; margin: 0;
    font-size: 1rem; color: var(--body-color); text-align: left;
    list-style: none;
    background-color: #fff; background-clip: padding-box;
    border: 1px solid rgba(0, 0, 0, .15);
    border-radius: var(--border-radius);
}
.dropdown-menu.show { display: block; }
/* ตำแหน่งตอนเปิดคำนวณใน assets/js/bs-compat.js (position: fixed อิงปุ่ม)
   ค่าด้านล่างเป็นค่าสำรองกรณี JS ยังไม่ทำงาน */
.dropdown-menu { top: 100%; left: 0; margin-top: .125rem; }
.dropdown-menu.dropdown-menu-end { right: 0; left: auto; }
.dropdown-item {
    display: block; width: 100%;
    padding: .25rem 1rem; clear: both;
    font-weight: 400; color: var(--body-color); text-align: inherit;
    text-decoration: none; white-space: nowrap;
    background-color: transparent; border: 0;
}
.dropdown-item:hover, .dropdown-item:focus { color: #1e2125; background-color: #e9ecef; }
.dropdown-item.active { color: #fff; background-color: var(--primary-color); }
.dropdown-item.disabled, .dropdown-item:disabled {
    color: #adb5bd; pointer-events: none; background-color: transparent;
}
.dropdown-divider {
    height: 0; margin: .5rem 0; overflow: hidden;
    border-top: 1px solid rgba(0, 0, 0, .15); opacity: 1;
}

/* ── 15. modal / toast ──────────────────────────────────────────────────── */
.fade { transition: opacity .15s linear; }
.modal.fade .modal-dialog { transform: translate(0, -50px); transition: transform .3s ease-out; }
.modal.show .modal-dialog  { transform: none; }

.modal {
    position: fixed; top: 0; left: 0; z-index: 1055;
    display: none; width: 100%; height: 100%;
    overflow-x: hidden; overflow-y: auto;
    outline: 0;
}
.modal-dialog {
    position: relative; width: auto; margin: .5rem;
    pointer-events: none;
}
.modal.fade    { opacity: 0; }
.modal.show    { opacity: 1; }
.modal-dialog-scrollable { height: calc(100% - 1rem); }
.modal-dialog-scrollable .modal-content { max-height: 100%; overflow: hidden; }
.modal-dialog-scrollable .modal-body    { overflow-y: auto; }
.modal-dialog-centered { display: flex; align-items: center; min-height: calc(100% - 1rem); }
.modal-content {
    position: relative; display: flex; flex-direction: column;
    width: 100%; color: var(--body-color); pointer-events: auto;
    background-color: #fff; background-clip: padding-box;
    border: 1px solid rgba(0, 0, 0, .2);
    border-radius: .5rem; outline: 0;
}
.modal-backdrop {
    position: fixed; top: 0; left: 0; z-index: 1050;
    width: 100vw; height: 100vh;
    background-color: #000; opacity: 0;
    transition: opacity .15s linear;
}
.modal-backdrop.show { opacity: .5; }
.modal-header {
    display: flex; flex-shrink: 0; align-items: center;
    justify-content: space-between;
    padding: 1rem 1rem;
    border-bottom: 1px solid var(--border-color);
    border-top-left-radius: calc(.5rem - 1px);
    border-top-right-radius: calc(.5rem - 1px);
}
.modal-title { margin-bottom: 0; line-height: 1.5; }
.modal-body  { position: relative; flex: 1 1 auto; padding: 1rem; }
.modal-footer {
    display: flex; flex-shrink: 0; flex-wrap: wrap;
    align-items: center; justify-content: flex-end;
    padding: .75rem;
    border-top: 1px solid var(--border-color);
    border-bottom-right-radius: calc(.5rem - 1px);
    border-bottom-left-radius: calc(.5rem - 1px);
}
.modal-footer > * { margin: .25rem; }
/* ปุ่มปิดที่มุมขวาบนของ modal — ดันออกนอกระยะ padding ของหัว */
.modal-header .btn-close { padding: .5rem; margin: -.5rem -.5rem -.5rem auto; }

/* ล็อกการเลื่อนหน้าเว็บระหว่างเปิด modal */
body.modal-open { overflow: hidden; }

@media (min-width: 576px) {
    .modal-dialog { max-width: 500px; margin: 1.75rem auto; }
    .modal-dialog-scrollable { height: calc(100% - 3.5rem); }
    .modal-dialog-centered   { min-height: calc(100% - 3.5rem); }
    .modal-sm { max-width: 300px; }
}
@media (min-width: 992px) { .modal-lg, .modal-xl { max-width: 800px; } }
@media (min-width: 1200px) { .modal-xl { max-width: 1140px; } }

.toast {
    width: 350px; max-width: 100%;
    font-size: .875rem;
    color: var(--body-color);
    pointer-events: auto;
    background-color: rgba(255, 255, 255, .85);
    background-clip: padding-box;
    border: 1px solid rgba(0, 0, 0, .1);
    box-shadow: 0 .5rem 1rem rgba(0, 0, 0, .15);
    border-radius: var(--border-radius);
}
.toast.showing { opacity: 0; }
.toast:not(.show) { display: none; }
.toast-body { padding: .75rem; word-wrap: break-word; }

/* ── 16. ป้าย / breadcrumb / progress / spinner ─────────────────────────── */
.badge {
    display: inline-block;
    padding: .35em .65em;
    font-size: .75em; font-weight: 700; line-height: 1;
    color: #fff; text-align: center; white-space: nowrap; vertical-align: baseline;
    border-radius: var(--border-radius);
}
.badge:empty { display: none; }
.btn .badge { position: relative; top: -1px; }

.breadcrumb {
    display: flex; flex-wrap: wrap;
    padding: 0; margin-bottom: 1rem;
    font-size: 1rem; list-style: none;
}
.breadcrumb-item + .breadcrumb-item { padding-left: .5rem; }
.breadcrumb-item + .breadcrumb-item::before {
    float: left; padding-right: .5rem; color: var(--muted-color); content: "/";
}
.breadcrumb-item.active { color: var(--muted-color); }

.progress {
    display: flex; height: 1rem; overflow: hidden;
    font-size: .75rem;
    background-color: #e9ecef;
    border-radius: var(--border-radius);
}
.progress-bar {
    display: flex; flex-direction: column; justify-content: center;
    overflow: hidden;
    color: #fff; text-align: center; white-space: nowrap;
    background-color: var(--primary-color);
    transition: width .6s ease;
}

@keyframes spinner-border { to { transform: rotate(360deg); } }
.spinner-border {
    display: inline-block; width: 2rem; height: 2rem;
    vertical-align: -.125em;
    border: .25em solid currentcolor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: .75s linear infinite spinner-border;
}
.spinner-border-sm { width: 1rem; height: 1rem; border-width: .2em; }
@media (prefers-reduced-motion: reduce) { .spinner-border { animation-duration: 1.5s; } }

/* ── 17. เบ็ดเตล็ด ──────────────────────────────────────────────────────── */
.img-thumbnail {
    padding: .25rem; background-color: #fff;
    border: 1px solid var(--border-color); border-radius: var(--border-radius);
    max-width: 100%; height: auto;
}
.visually-hidden {
    position: absolute !important; width: 1px !important; height: 1px !important;
    padding: 0 !important; margin: -1px !important; overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important; white-space: nowrap !important; border: 0 !important;
}
.vr {
    display: inline-block; align-self: stretch;
    width: 1px; min-height: 1em;
    background-color: currentcolor; opacity: .25;
}
.alert-link { font-weight: 700; }
/* .bi = คลาสฐานของ Bootstrap Icons — ไฟล์ฟอนต์อยู่ใน assets/vendor/bootstrap-icons */