:root {
    --sidebar-w: 220px;
    --sidebar-bg: #33384A;
    --sidebar-text: #AEB4C7;
    --sidebar-text-hover: #FFFFFF;
    --sidebar-hover-bg: rgba(255, 255, 255, 0.06);

    --page-bg: #FAFAFC;
    --card-bg: #FFFFFF;
    --border: #E6E7EF;

    --text-primary: #33384A;
    --text-secondary: #494F63;
    --text-muted: #8B90A3;

    --accent: #5C7CB0;
    --accent-hover: #4C6A9A;

    --icon-blue: #9BB8E8;
    --icon-teal: #8FD4C1;
    --icon-coral: #E8B79B;
    --icon-amber: #E3CB86;
    --icon-purple: #B9AEE0;
    --icon-red: #E8A0A0;

    --icon-blue-fg: #0C447C;
    --icon-teal-fg: #085041;
    --icon-coral-fg: #712B13;
    --icon-amber-fg: #633806;
    --icon-purple-fg: #3C3489;
    --icon-red-fg: #791F1F;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Sarabun', sans-serif;
    font-size: 14px;
    line-height: 1.7;
    background: var(--page-bg);
    color: var(--text-primary);
}

h1, h2, h3 {
    font-weight: 500;
    line-height: 1.4;
    color: var(--text-primary);
    margin: 0 0 16px;
}

h1 { font-size: 20px; }

.app-layout { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar-w);
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    padding: 16px 0;
}

.sidebar-brand {
    font-weight: 500;
    font-size: 16px;
    color: #fff;
    padding: 0 16px 18px;
}

.sidebar-nav { display: flex; flex-direction: column; flex: 1; gap: 2px; }

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 16px;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 14px;
}

.sidebar-nav a:hover {
    background: var(--sidebar-hover-bg);
    color: var(--sidebar-text-hover);
}

.nav-icon-chip {
    width: 26px;
    height: 26px;
    border-radius: 7px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.nav-icon-chip svg { width: 15px; height: 15px; }
.chip-blue { background: var(--icon-blue); }
.chip-blue svg { stroke: var(--icon-blue-fg); }
.chip-teal { background: var(--icon-teal); }
.chip-teal svg { stroke: var(--icon-teal-fg); }
.chip-coral { background: var(--icon-coral); }
.chip-coral svg { stroke: var(--icon-coral-fg); }
.chip-amber { background: var(--icon-amber); }
.chip-amber svg { stroke: var(--icon-amber-fg); }
.chip-purple { background: var(--icon-purple); }
.chip-purple svg { stroke: var(--icon-purple-fg); }
.chip-red { background: var(--icon-red); }
.chip-red svg { stroke: var(--icon-red-fg); }

.sidebar-divider {
    height: 2px;
    margin: 10px 16px 6px;
    border-radius: 2px;
    opacity: 0.5;
}

.sidebar-footer {
    padding: 12px 16px;
    border-top: 0.5px solid rgba(255, 255, 255, 0.1);
    font-size: 13px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    color: var(--sidebar-text);
}

.sidebar-footer a { color: var(--icon-blue); text-decoration: none; }
.sidebar-footer a:hover { color: #fff; }

.main-content { flex: 1; padding: 28px 32px; }

.kpi-grid { display: flex; gap: 16px; margin-bottom: 24px; }

.kpi-card {
    background: var(--card-bg);
    border: 0.5px solid var(--border);
    border-radius: 12px;
    padding: 16px 24px;
    min-width: 160px;
}

.kpi-label { font-size: 13px; color: var(--text-secondary); }
.kpi-value { font-size: 26px; font-weight: 500; color: var(--text-primary); margin-top: 4px; }

.data-table { width: 100%; border-collapse: collapse; background: var(--card-bg); border: 0.5px solid var(--border); border-radius: 12px; overflow: hidden; }
.data-table th, .data-table td {
    border-bottom: 0.5px solid var(--border);
    padding: 10px 14px;
    text-align: left;
}
.data-table th {
    background: var(--page-bg);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}
.data-table td { font-size: 14px; color: var(--text-secondary); }
.data-table tr:last-child td { border-bottom: none; }

.flash-messages { margin-bottom: 16px; }
.flash { padding: 10px 16px; border-radius: 8px; margin-bottom: 8px; font-size: 13px; }
.flash-danger { background: #FBEAEA; color: #99302E; }
.flash-warning { background: #FBF3E2; color: #8A6412; }
.flash-success { background: #E6F5EF; color: #21694E; }

.login-body {
    display: flex; align-items: center; justify-content: center;
    height: 100vh; background: var(--page-bg); margin: 0;
    font-family: 'Sarabun', sans-serif;
}
.login-box {
    background: var(--card-bg); padding: 32px; border-radius: 12px;
    width: 320px; border: 0.5px solid var(--border);
}
.login-box h1 { font-size: 20px; margin-bottom: 16px; color: var(--text-primary); }
.login-box label { display: block; margin-top: 12px; font-size: 13px; color: var(--text-secondary); }
.login-box input {
    width: 100%; padding: 9px 10px; margin-top: 4px;
    border: 0.5px solid var(--border); border-radius: 8px;
    font-family: 'Sarabun', sans-serif; font-size: 14px;
    color: var(--text-primary);
}
.login-box input:focus {
    outline: none; border-color: var(--accent);
}
.login-box button {
    width: 100%; margin-top: 20px; padding: 10px;
    background: var(--accent); color: #fff; border: none;
    border-radius: 8px; cursor: pointer;
    font-family: 'Sarabun', sans-serif; font-size: 14px; font-weight: 500;
}
.login-box button:hover { background: var(--accent-hover); }

.form-card {
    background: var(--card-bg);
    border: 0.5px solid var(--border);
    border-radius: 12px;
    padding: 20px 24px;
    max-width: 420px;
}
.form-card label { display: block; margin-top: 14px; font-size: 13px; color: var(--text-secondary); }
.form-card label:first-of-type { margin-top: 0; }
.form-card input[type="text"],
.form-card input[type="password"],
.form-card input[type="number"],
.form-card input[type="date"],
.form-card select {
    width: 100%; padding: 9px 10px; margin-top: 4px;
    border: 0.5px solid var(--border); border-radius: 8px;
    font-family: 'Sarabun', sans-serif; font-size: 14px;
    color: var(--text-primary); background: #fff;
}
.form-card input:disabled { background: var(--page-bg); color: var(--text-muted); }
.form-card input:focus, .form-card select:focus { outline: none; border-color: var(--accent); }

.searchable-select-wrap { position: relative; margin-top: 4px; }
.searchable-select-wrap select { display: none; }
.searchable-select-wrap input[type="text"] { margin-top: 0; }
.ss-options {
    position: absolute; left: 0; right: 0; top: calc(100% + 4px); z-index: 20;
    background: #fff; border: 0.5px solid var(--border); border-radius: 8px;
    max-height: 260px; overflow-y: auto; box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    display: none;
}
.ss-options.open { display: block; }
.ss-option { padding: 9px 12px; font-size: 14px; cursor: pointer; }
.ss-option:hover, .ss-option.active { background: var(--page-bg); }
.ss-option-empty { padding: 9px 12px; font-size: 13px; color: var(--text-muted); }

.date-input-wrap { position: relative; margin-top: 4px; }
.date-input-wrap input[type="date"] {
    margin-top: 0; padding-right: 36px; width: 100%;
    color-scheme: light;
}
.date-input-wrap input[type="date"]::-webkit-calendar-picker-indicator {
    position: absolute; right: 0; top: 0; width: 36px; height: 100%;
    opacity: 0; cursor: pointer; margin: 0;
}
.date-input-icon {
    position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
    width: 16px; height: 16px; color: var(--text-muted); pointer-events: none;
}

.btn {
    display: inline-flex; align-items: center; gap: 6px; justify-content: center;
    padding: 8px 16px; border-radius: 8px; border: 0.5px solid var(--border);
    background: #fff; color: var(--text-primary); text-decoration: none;
    font-size: 14px; cursor: pointer; font-family: 'Sarabun', sans-serif;
}
.btn:hover { background: var(--page-bg); }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); }

.link-button {
    background: none; border: none; padding: 0; color: var(--accent);
    cursor: pointer; font-size: 14px; font-family: 'Sarabun', sans-serif; text-decoration: underline;
}

.badge {
    display: inline-block; padding: 3px 10px; border-radius: 999px;
    font-size: 12px; font-weight: 500;
}
.badge-role { background: #EDEBFB; color: #4C3F99; }
.badge-success { background: #E6F5EF; color: #21694E; }
.badge-danger { background: #FBEAEA; color: #B3261E; }
.badge-warning { background: #FBF3E2; color: #8A6412; }
.badge-muted { background: #F1F1F5; color: var(--text-muted); }

/* ความสดของสี (ตั้งค่าได้ในหน้า "ข้อมูลบริษัท") — ปรับเฉพาะจุดสีตัน (ปุ่ม/ป้ายสถานะ/แท็บที่เลือกอยู่)
   ไม่แตะพื้นหลัง/ตัวหนังสือทั่วไป กันอ่านยาก ดู body class ที่ base.html */
body.sat-vivid .btn-primary,
body.sat-vivid .pill-tab.active,
body.sat-vivid .tab-btn.active,
body.sat-vivid .badge-role,
body.sat-vivid .badge-success,
body.sat-vivid .badge-danger,
body.sat-vivid .badge-warning { filter: saturate(1.35); }

body.sat-most .btn-primary,
body.sat-most .pill-tab.active,
body.sat-most .tab-btn.active,
body.sat-most .badge-role,
body.sat-most .badge-success,
body.sat-most .badge-danger,
body.sat-most .badge-warning { filter: saturate(1.85) brightness(1.05); }

.tab-bar { display: flex; gap: 4px; border-bottom: 0.5px solid var(--border); margin-bottom: 16px; }
.tab-btn {
    background: none; border: none; cursor: pointer; padding: 10px 16px;
    font-family: 'Sarabun', sans-serif; font-size: 14px; font-weight: 500;
    color: var(--text-secondary); border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* แถบแท็บแบบเม็ดยา (segmented pill) — แบบ A มาตรฐานของทั้งระบบ ใช้แทน .tab-bar/.tab-btn เดิมทุกโมดูล
   ใช้ได้ทั้งกับ <a> (สลับหน้า) และ <button> (สลับแท็บด้วย JS ฝั่ง client เช่น หน้าคลังสินค้า/สินค้า) */
.pill-tab-bar {
    display: inline-flex; background: #F1F1F5; border-radius: 10px; padding: 4px; gap: 2px;
    margin-bottom: 16px; flex-wrap: wrap;
}
.pill-tab {
    display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: 8px;
    font-family: 'Sarabun', sans-serif; font-size: 14px; font-weight: 500;
    color: var(--text-secondary); text-decoration: none; white-space: nowrap;
    background: none; border: none; cursor: pointer;
}
.pill-tab:hover { color: var(--text-primary); }
.pill-tab.active { background: var(--accent); color: #fff; }
.pill-tab .pill-count {
    background: #fff; color: var(--text-muted); padding: 1px 7px; border-radius: 999px; font-size: 12px;
}
.pill-tab.active .pill-count { background: rgba(255, 255, 255, 0.25); color: #fff; }
.pill-tab .badge { margin-left: 2px; }

.summary-section { margin-top: 24px; }
.summary-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 12px 16px; border-radius: 12px 12px 0 0;
}
.summary-header.summary-success { background: #E6F5EF; }
.summary-header.summary-danger { background: #FBEAEA; }
.summary-header.summary-warning { background: #FBF3E2; }
.summary-header.summary-role { background: #EDEBFB; }
.summary-title { font-size: 14px; font-weight: 500; margin: 0; }
.summary-value { font-size: 14px; font-weight: 500; margin: 0; }
.summary-header.summary-success .summary-title,
.summary-header.summary-success .summary-value { color: #21694E; }
.summary-header.summary-danger .summary-title,
.summary-header.summary-danger .summary-value { color: #B3261E; }
.summary-header.summary-warning .summary-title,
.summary-header.summary-warning .summary-value { color: #8A6412; }
.summary-header.summary-role .summary-title,
.summary-header.summary-role .summary-value { color: #4C3F99; }
.summary-section .data-table { border-radius: 0 0 12px 12px; border-top: none; }

#items-table .item-row-custom { background: #FBF7EE; }
#items-table input[type="text"], #items-table input[type="number"] { padding: 6px 8px; border: 0.5px solid var(--border); border-radius: 6px; font-family: 'Sarabun', sans-serif; font-size: 13px; }
#items-table .row-total { text-align: right; font-weight: 500; }

.product-combobox { position: relative; }
.product-combobox .product-search { width: 100%; box-sizing: border-box; }
.product-suggestions {
    display: none; position: fixed;
    background: var(--card-bg); border: 0.5px solid var(--border); border-radius: 8px;
    max-height: 220px; overflow-y: auto; z-index: 1000;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
}
.product-suggestion-item {
    padding: 7px 10px; font-size: 13px; color: var(--text-primary);
    cursor: pointer; border-top: 0.5px solid var(--page-bg);
}
.product-suggestion-item:first-child { border-top: none; }
.product-suggestion-item:hover, .product-suggestion-item.active { background: var(--page-bg); }

.category-pill-bar { display: flex; gap: 6px; margin: 6px 0 8px; flex-wrap: wrap; }
.category-pill {
    font-size: 12px; padding: 5px 12px; border-radius: 999px;
    border: 0.5px solid var(--border); background: #fff; color: var(--text-secondary);
    cursor: pointer; font-family: 'Sarabun', sans-serif;
}
.category-pill:hover { background: var(--page-bg); }
.category-pill.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* สวิตช์เอา/ไม่เอาภาษี — ใช้ในหน้าบิลเจ้าหนี้ สลับได้ทันทีทุกสถานะ (submit อัตโนมัติเมื่อสลับ) */
.vat-switch { position: relative; display: inline-block; width: 38px; height: 22px; flex-shrink: 0; }
.vat-switch input { position: absolute; opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.vat-switch .track { position: absolute; inset: 0; background: #D3D1C7; border-radius: 11px; transition: background .15s; pointer-events: none; }
.vat-switch .track::before {
    content: ""; position: absolute; width: 18px; height: 18px; left: 2px; top: 2px;
    background: #fff; border-radius: 50%; transition: transform .15s;
}
.vat-switch input:checked + .track { background: var(--accent); }
.vat-switch input:checked + .track::before { transform: translateX(16px); }
.vat-switch-row {
    display: flex; align-items: center; justify-content: space-between; gap: 12px;
    background: var(--page-bg); border-radius: 8px; padding: 10px 12px; margin-bottom: 12px;
}