:root {
        --red: #c62828;
        --red-dark: #a51f1f;
        --red-soft: #fdebec;
        --ink: #25282d;
        --ink-2: #42464d;
        --paper: #f5f6f8;
        --white: #fff;
        --line: #e4e7ec;
        --muted: #727986;
        --green: #168060;
        --amber: #b66b13;
        --shadow: 0 22px 70px rgba(37, 40, 45, 0.09);
        --shadow-sm: 0 9px 28px rgba(37, 40, 45, 0.07);
      }
      * {
        box-sizing: border-box;
      }
      html {
        font-size: 16px;
        scroll-behavior: smooth;
      }
      body {
        margin: 0;
        background: var(--paper);
        color: var(--ink);
        font:
          16px/1.6 "IBM Plex Sans Thai",
          system-ui,
          sans-serif;
        min-height: 100vh;
      }
      body:before {
        content: "";
        position: fixed;
        inset: 0;
        pointer-events: none;
        background:
          radial-gradient(
            circle at 80% 0%,
            rgba(198, 40, 40, 0.08),
            transparent 28%
          ),
          linear-gradient(135deg, transparent 70%, rgba(37, 40, 45, 0.025));
        z-index: -1;
      }
      button,
      input,
      select,
      textarea {
        font: inherit;
      }
      .shell {
        min-height: 100vh;
        display: grid;
        grid-template-columns: 280px minmax(0, 1fr);
      }
      .side {
        position: sticky;
        top: 0;
        height: 100vh;
        background: var(--white);
        border-right: 1px solid var(--line);
        color: var(--ink);
        padding: 28px 20px;
        display: flex;
        flex-direction: column;
        overflow: hidden;
      }
      .side:before,
      .side:after {
        content: "";
        position: absolute;
        border: 1px solid rgba(198, 40, 40, 0.08);
        border-radius: 50%;
        pointer-events: none;
      }
      .side:before {
        width: 260px;
        height: 260px;
        right: -150px;
        top: -95px;
      }
      .side:after {
        width: 190px;
        height: 190px;
        left: -120px;
        bottom: 40px;
      }
      .brand {
        position: relative;
        display: grid;
        grid-template-columns: 48px 1fr;
        gap: 13px;
        align-items: center;
        font-weight: 700;
        font-size: 1.08rem;
        padding: 4px 8px 34px;
        letter-spacing: 0.01em;
      }
      .brand:before {
        content: "SR";
        width: 48px;
        height: 48px;
        border-radius: 16px;
        display: grid;
        place-items: center;
        background: var(--red);
        color: var(--white);
        font-weight: 800;
        box-shadow: 0 10px 25px rgba(198, 40, 40, 0.16);
      }
      .brand small {
        display: block;
        font-weight: 400;
        color: var(--muted);
        font-size: 0.78rem;
        margin-top: -2px;
        letter-spacing: 0;
      }
      .nav {
        position: relative;
        display: grid;
        gap: 9px;
      }
      .nav button {
        display: flex;
        align-items: center;
        gap: 10px;
        border: 1px solid transparent;
        background: transparent;
        color: var(--ink-2);
        border-radius: 14px;
        padding: 13px 14px;
        text-align: left;
        cursor: pointer;
        transition: 0.22s ease;
        font-weight: 500;
      }
      .nav button:before {
        content: "";
        width: 7px;
        height: 7px;
        border-radius: 50%;
        background: #c5c8ce;
        transition: 0.2s;
      }
      .nav button:hover {
        background: var(--red-soft);
        transform: translateX(2px);
      }
      .nav button.active {
        background: var(--red-soft);
        color: var(--red);
        box-shadow: inset 3px 0 0 var(--red);
        font-weight: 700;
      }
      .nav button.active:before {
        background: var(--red);
        box-shadow: 0 0 0 4px var(--red-soft);
      }
      .adminBtn {
        margin-top: 18px !important;
        border: 1px solid var(--line) !important;
        background: var(--paper) !important;
        justify-content: center;
      }
      .adminBtn:before {
        content: "◆" !important;
        background: transparent !important;
        width: auto !important;
        height: auto !important;
      }
      .main {
        padding: 42px 4.5vw 80px;
        max-width: 1440px;
        width: 100%;
        margin: auto;
      }
      .head {
        display: flex;
        justify-content: space-between;
        align-items: flex-end;
        margin-bottom: 25px;
      }
      .head:after {
        content: "SSTB / FACILITY";
        font-size: 0.72rem;
        letter-spacing: 0.16em;
        color: var(--muted);
        font-weight: 600;
      }
      h1 {
        margin: 2px 0 0;
        font-size: clamp(1.85rem, 3vw, 2.6rem);
        line-height: 1.18;
        letter-spacing: -0.035em;
      }
      h2 {
        position: relative;
        margin: 31px 0 17px;
        padding-left: 17px;
        font-size: 1.1rem;
        letter-spacing: -0.01em;
      }
      h2:first-child {
        margin-top: 0;
      }
      h2:before {
        content: "";
        position: absolute;
        left: 0;
        top: 5px;
        width: 5px;
        height: 21px;
        background: var(--red);
        border-radius: 99px;
      }
      .eyebrow {
        color: var(--red);
        font-size: 0.75rem;
        font-weight: 700;
        letter-spacing: 0.16em;
      }
      .card {
        position: relative;
        background: var(--white);
        border: 1px solid rgba(228, 231, 236, 0.9);
        border-radius: 28px;
        padding: clamp(22px, 3vw, 38px);
        margin-bottom: 20px;
        box-shadow: var(--shadow);
        overflow: hidden;
      }
      .card:before {
        content: "";
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        height: 4px;
        background: linear-gradient(
          90deg,
          var(--red) 0%,
          var(--red) 18%,
          var(--red-soft) 18%,
          var(--red-soft) 100%
        );
      }
      .grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 18px;
      }
      .field {
        display: grid;
        gap: 8px;
      }
      .requesterNameFields {
        display: grid;
        grid-template-columns: 126px minmax(0, 1fr);
        gap: 8px;
      }
      .requesterPrefixPicker { position:relative; min-width:0; }
      .requesterSection { overflow:visible; }
      .requesterSection:has(.prefixTrigger[aria-expanded="true"]) { z-index:8; }
      .prefixTrigger { width:100%; height:100%; min-height:52px; display:flex; align-items:center; justify-content:space-between; gap:8px; padding:12px 14px; border:1px solid var(--line); border-radius:14px; background:#fff; color:var(--ink-2); font:inherit; cursor:pointer; }
      .prefixTrigger:hover,.prefixTrigger[aria-expanded="true"] { border-color:var(--red); background:var(--red-soft); color:var(--ink); }
      .prefixTrigger:focus-visible { outline:0; border-color:var(--red); box-shadow:0 0 0 4px rgba(127,23,38,.10); }
      .prefixTrigger i { color:var(--red); transition:transform .18s ease; }
      .prefixTrigger[aria-expanded="true"] i { transform:rotate(180deg); }
      .prefixMenu { position:absolute; z-index:30; top:calc(100% + 7px); left:0; width:100%; box-sizing:border-box; padding:6px; border:1px solid var(--line); border-radius:14px; background:#fff; box-shadow:0 14px 38px rgba(45,20,24,.16); }
      .prefixMenu button { width:100%; padding:10px 12px; border:0; border-radius:9px; background:transparent; color:var(--ink); text-align:left; font:inherit; cursor:pointer; }
      .prefixMenu button:hover,.prefixMenu button[aria-selected="true"] { background:var(--red-soft); color:var(--red-dark); font-weight:700; }
      .full {
        grid-column: 1/-1;
      }
      label {
        font-size: 0.88rem;
        font-weight: 600;
        color: var(--ink-2);
      }
      input,
      select,
      textarea {
        width: 100%;
        border: 1px solid var(--line);
        border-radius: 14px;
        padding: 12px 14px;
        background: #fafbfc;
        color: var(--ink);
        transition: 0.2s;
        min-height: 49px;
      }
      textarea {
        resize: vertical;
        min-height: 95px;
      }
      input:hover,
      select:hover,
      textarea:hover {
        border-color: #c7cbd2;
        background: var(--white);
      }
      input:focus,
      select:focus,
      textarea:focus {
        outline: 0;
        border-color: var(--red);
        background: var(--white);
        box-shadow: 0 0 0 4px rgba(198, 40, 40, 0.1);
      }
      input[type="file"] {
        padding: 16px;
        background: linear-gradient(135deg, #fff, var(--red-soft));
        border: 1.5px dashed #e5a3a3;
      }
      .checks {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
      }
      .check {
        position: relative;
        display: flex;
        gap: 10px;
        align-items: center;
        border: 1px solid var(--line);
        border-radius: 16px;
        padding: 13px 14px;
        background: #fafbfc;
        min-height: 58px;
        cursor: pointer;
        transition: 0.2s;
      }
      .check:hover {
        border-color: #e5a3a3;
        background: var(--red-soft);
        transform: translateY(-1px);
        box-shadow: var(--shadow-sm);
      }
      .check:has(input[type="checkbox"]:checked) {
        border-color: var(--red);
        background: var(--red-soft);
        color: var(--red);
        box-shadow: 0 0 0 3px rgba(198, 40, 40, 0.06);
      }
      .check input[type="checkbox"] {
        appearance: none;
        width: 20px;
        height: 20px;
        min-height: 20px;
        padding: 0;
        border: 1.5px solid #abb0ba;
        border-radius: 6px;
        background: white;
        display: grid;
        place-items: center;
      }
      .check input[type="checkbox"]:checked {
        background: var(--red);
        border-color: var(--red);
      }
      .check input[type="checkbox"]:checked:after {
        content: "\f26e"; font-family: "bootstrap-icons";
        color: white;
        font-size: 0.78rem;
        font-weight: 700;
      }
      .qty {
        width: 88px !important;
        min-height: 38px !important;
        margin-left: auto;
        padding: 7px 9px !important;
        background: white !important;
        border-radius: 10px !important;
      }
      .primary,
      .outline,
      .danger {
        border-radius: 13px;
        padding: 11px 18px;
        font-weight: 700;
        cursor: pointer;
        transition: 0.2s;
        min-height: 46px;
      }
      .primary {
        background: linear-gradient(135deg, var(--red), var(--red-dark));
        color: white;
        border: 0;
        box-shadow: 0 10px 22px rgba(198, 40, 40, 0.22);
      }
      .primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 14px 28px rgba(198, 40, 40, 0.3);
      }
      .outline {
        background: white;
        color: var(--ink);
        border: 1px solid var(--line);
      }
      .outline:hover {
        border-color: var(--ink);
        background: #f8f9fa;
      }
      .danger {
        background: var(--red-soft);
        color: var(--red-dark);
        border: 1px solid #f3cccc;
      }
      .actions {
        display: flex;
        justify-content: flex-end;
        gap: 10px;
        margin-top: 28px;
        padding-top: 22px;
        border-top: 1px solid var(--line);
      }
      .hidden {
        display: none !important;
      }
      .status {
        display: inline-flex;
        align-items: center;
        border-radius: 999px;
        padding: 5px 10px;
        font-size: 0.76rem;
        font-weight: 700;
      }
      .status:before {
        content: "";
        width: 6px;
        height: 6px;
        border-radius: 50%;
        margin-right: 6px;
        background: currentColor;
      }
      .PENDING {
        background: #fff2d9;
        color: #8b5700;
      }
      .APPROVED {
        background: #dcf4ea;
        color: #09694e;
      }
      .REJECTED {
        background: var(--red-soft);
        color: var(--red-dark);
      }
      .tableWrap {
        overflow: auto;
        margin: -10px;
      }
      table {
        width: 100%;
        border-collapse: separate;
        border-spacing: 0;
        min-width: 980px;
      }
      th,
      td {
        text-align: left;
        padding: 15px 13px;
        border-bottom: 1px solid #edf0f3;
        vertical-align: middle;
      }
      th {
        position: sticky;
        top: 0;
        background: #f8f9fb;
        font-size: 0.75rem;
        letter-spacing: 0.03em;
        color: var(--muted);
        text-transform: uppercase;
      }
      tbody tr {
        transition: 0.2s;
      }
      tbody tr:hover {
        background: #fff7f7;
      }
      .tableWrap select {
        min-width: 112px;
        min-height: 40px;
        padding: 7px 10px;
      }
      .tableWrap button {
        margin: 2px;
        padding: 7px 10px;
        min-height: 38px;
        font-size: 0.8rem;
      }
      .modal {
        position: fixed;
        inset: 0;
        background: rgba(17, 19, 25, 0.72);
        backdrop-filter: blur(8px);
        display: grid;
        place-items: center;
        padding: 18px;
        z-index: 20;
      }
      .dialog {
        position: relative;
        background: white;
        width: min(440px, 100%);
        border-radius: 26px;
        padding: 32px;
        box-shadow: 0 30px 90px rgba(0, 0, 0, 0.3);
        animation: pop 0.25s ease;
      }
      .dialog:before {
        content: "";
        position: absolute;
        inset: 0 0 auto;
        height: 6px;
        background: var(--red);
        border-radius: 26px 26px 0 0;
      }
      .toast {
        position: fixed;
        right: 24px;
        bottom: 24px;
        padding: 14px 18px;
        background: var(--ink);
        color: #fff;
        border: 1px solid #ffffff18;
        border-radius: 14px;
        box-shadow: 0 18px 50px rgba(0, 0, 0, 0.25);
        z-index: 30;
        animation: toastIn 0.25s ease;
      }
      .loading {
        opacity: 0.58;
        pointer-events: none;
      }
      .loading:after {
        content: "กำลังดำเนินการ...";
        position: fixed;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        background: var(--ink);
        color: #fff;
        padding: 12px 18px;
        border-radius: 12px;
        opacity: 1;
      }
      .page {
        animation: fade 0.28s ease;
      }
      @keyframes fade {
        from {
          opacity: 0;
          transform: translateY(7px);
        }
      }
      @keyframes pop {
        from {
          opacity: 0;
          transform: scale(0.96);
        }
      }
      @keyframes toastIn {
        from {
          opacity: 0;
          transform: translateY(10px);
        }
      }
      @media (max-width: 900px) {
        .shell {
          grid-template-columns: 1fr;
        }
        .side {
          position: static;
          height: auto;
          padding: 18px;
        }
        .brand {
          padding-bottom: 17px;
        }
        .nav {
          grid-template-columns: repeat(2, 1fr);
        }
        .adminBtn {
          margin-top: 0 !important;
        }
        .main {
          padding: 25px 16px 70px;
        }
        .head {
          align-items: flex-start;
        }
        .head:after {
          display: none;
        }
        .grid,
        .checks {
          grid-template-columns: 1fr;
        }
        .full {
          grid-column: auto;
        }
        .card {
          border-radius: 22px;
          padding: 22px;
        }
        .actions {
          position: sticky;
          bottom: 0;
          background: rgba(255, 255, 255, 0.94);
          backdrop-filter: blur(10px);
          margin: 24px -10px -10px;
          padding: 14px 10px;
          z-index: 4;
        }
      }
      @media (max-width: 520px) {
        .nav {
          grid-template-columns: 1fr;
        }
        .brand {
          font-size: 1rem;
        }
        .main {
          padding-top: 20px;
        }
        .head {
          margin-bottom: 18px;
        }
        h1 {
          font-size: 1.75rem;
        }
        .checks {
          gap: 9px;
        }
        .check {
          padding: 11px;
        }
        .actions {
          flex-direction: column-reverse;
        }
        .actions button {
          width: 100%;
        }
      }
      /* Collapsible navigation and readable school identity. */
      .shell { display: block; }
      body:before { background: none; }
      .topbar { position: sticky; top: 0; z-index: 12; display: flex; align-items: center; gap: 16px; min-height: 76px; padding: 14px 28px; background: var(--white); border-bottom: 1px solid var(--line); }
      .menuToggle, .menuClose { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 12px; background: var(--white); color: var(--ink); cursor: pointer; }
      .menuToggle:hover, .menuClose:hover { background: var(--red-soft); color: var(--red); }
      .topbarTitle { min-width: 0; font-weight: 700; line-height: 1.45; }
      .topbarTitle small { display: block; color: var(--muted); font-size: .78rem; font-weight: 400; }
      .side { position: fixed; top: 0; left: 0; width: min(310px, 88vw); height: 100dvh; z-index: 16; padding: 20px; overflow-y: auto; visibility: hidden; transform: translateX(-100%); transition: transform .25s ease, visibility .25s; box-shadow: var(--shadow); }
      .side:before, .side:after { display: none; }
      .sidebar-open .side { visibility: visible; transform: translateX(0); }
      .sidebar-open { overflow: hidden; }
      .sideHeader { display: flex; justify-content: flex-end; margin-bottom: 20px; }
      .brand { grid-template-columns: 48px minmax(0, 1fr); padding: 0 0 28px; gap: 12px; font-size: 1rem; }
      .brandText { min-width: 0; line-height: 1.5; }
      .brand small { margin-top: 4px; font-size: .82rem; letter-spacing: 0; }
      .nav { grid-template-columns: 1fr; }
      .adminBtn { margin-top: 18px!important; }
      .menuBackdrop { position: fixed; inset: 0; z-index: 15; background: rgba(37,40,45,.36); }
      .main { max-width: 1200px; padding: 32px 32px 64px; }
      .head:after { display: none; }
      h1 { font-size: clamp(1.55rem, 3vw, 2.1rem); line-height: 1.4; letter-spacing: 0; }
      button:focus-visible { outline: 3px solid var(--red); outline-offset: 3px; }
      @media(max-width: 600px) {
        .topbar { padding: 12px 16px; gap: 10px; }
        .topbarTitle { font-size: .9rem; }
        .topbarTitle small { font-size: .72rem; }
        .main { padding: 24px 16px 48px; }
      }
      .bookingIntro { margin: -8px 0 24px; color: var(--ink-2); max-width: 760px; }
      .bookingSection { padding: clamp(20px, 3vw, 32px); border-radius: 20px; box-shadow: var(--shadow-sm); }
      .sectionHeading { display: flex; align-items: flex-start; gap: 14px; margin-bottom: 24px; }
      .sectionNumber { display: grid; place-items: center; flex: 0 0 42px; height: 42px; border-radius: 12px; background: var(--red); color: white; font-weight: 700; }
      .sectionHeading h2 { margin: 0; padding: 0; font-size: 1.16rem; }
      .sectionHeading h2:before { display: none; }
      .sectionHeading p { margin: 4px 0 0; color: var(--ink-2); font-size: .86rem; }
      .equipmentHeading { margin: 24px 0 12px; font-size: 1rem; }
      .bookingFooter { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 8px 0 20px; }
      .bookingFooter p { margin: 0; color: var(--ink-2); font-size: .86rem; }
      .bookingFooter .actions { position: static; margin: 0; padding: 0; border: 0; background: transparent; flex-shrink: 0; }
      @media(max-width: 600px) {
        .bookingFooter { align-items: stretch; flex-direction: column; }
        .bookingFooter .actions { width: 100%; }
        .sectionHeading { gap: 10px; }
      }
      /* School red across the header and navigation. */
      body { background: #fff5f5; }
      .topbar { background: var(--red); color: var(--white); border-bottom-color: var(--red-dark); box-shadow: 0 4px 18px rgba(198,40,40,.18); }
      .topbarTitle small { color: #ffe5e5; }
      .side { background: linear-gradient(165deg, var(--red), var(--red-dark)); color: var(--white); border-right: 0; }
      .brand small { color: #ffe5e5; }
      .brand:before { background: var(--white); color: var(--red); }
      .menuToggle, .menuClose { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.45); color: var(--white); }
      .menuToggle:hover, .menuClose:hover { background: var(--white); color: var(--red); }
      .nav button { color: var(--white); }
      .nav button:before { background: #ffcaca; }
      .nav button:hover { background: rgba(255,255,255,.14); }
      .nav button.active { background: var(--white); color: var(--red); box-shadow: 0 6px 18px rgba(100,10,10,.15); }
      .nav button.active:before { background: var(--red); }
      .nav .adminBtn { background: rgba(255,255,255,.12)!important; border-color: rgba(255,255,255,.45)!important; }
      .nav .adminBtn:hover { background: rgba(255,255,255,.22)!important; }
      .topbar button:focus-visible, .side button:focus-visible { outline-color: var(--white); }
      .head h1 { color: var(--red-dark); }
      .card:before { background: var(--red); }
      @media(prefers-reduced-motion: reduce) { .side { transition: none; } }
    .nav button:before { display:none; } .bi { display:inline-block; flex-shrink:0; line-height:1; } .calendarToolbar button .bi { margin-inline:4px; }