/* ระบบอัปโหลดเกียรติบัตร — ธีมเขียวเข้ม–ครีม (ใช้ร่วมกันทุกหน้า) */
:root {
    --bg: #f5f3ec;
    --paper: #fffefa;
    --text: #243d31;
    --muted: #687c6e;
    --border: #e0e4d9;
    --primary: #195c4a;
    --on-primary: #ffffff;
    --soft: #eef5f1;
    --dark: #173e34;
    --on-dark: #f3f7ed;
    --on-dark-muted: #d4e2d6;
    --gold: #d4c399;
    --danger: #a83943;
    --danger-soft: #fff0ed;
    --danger-line: #f0d5cf;
    --warn: #8a5a12;
    --warn-soft: #fdf5e3;
    --warn-line: #efdcb2;
    --paper-cert: #fffdf7;
    --radius: 18px;
    --font: 'Sarabun', 'Leelawadee UI', Tahoma, sans-serif;
    color-scheme: light;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #1c2621;
        --paper: #29372e;
        --text: #e9f0e9;
        --muted: #b8c9ba;
        --border: #45574a;
        --primary: #8bdbbb;
        --on-primary: #18382e;
        --soft: #2c443c;
        --dark: #1b3931;
        --danger: #ffa1aa;
        --danger-soft: #492f31;
        --danger-line: #735051;
        --warn: #f3cf8a;
        --warn-soft: #43391f;
        --warn-line: #6d5b2e;
        color-scheme: dark;
    }
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; }
body { font: 400 15px/1.65 var(--font); background: var(--bg); color: var(--text); min-height: 100vh; }
h1, h2, h3, p { margin: 0; }
h1 { font-weight: 700; line-height: 1.35; letter-spacing: -.4px; text-wrap: balance; }
h2 { font-size: 20px; font-weight: 600; line-height: 1.45; }
h3 { font-size: 15px; font-weight: 600; line-height: 1.5; }
a { color: var(--primary); }
[hidden] { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.eyebrow { font-size: 11px; font-weight: 600; letter-spacing: 1.8px; text-transform: uppercase; color: var(--primary); margin-bottom: 9px; }
.nowrap { white-space: nowrap; }
.num { font-variant-numeric: tabular-nums; }

/* ── Header ── */
.app-header { display: flex; align-items: center; justify-content: space-between; gap: 16px 20px; flex-wrap: wrap; padding: 18px 32px; border-bottom: 1px solid var(--border); background: var(--paper); }
.app-header.on-bg { background: var(--bg); }
.brand { display: flex; align-items: center; gap: 13px; min-width: 0; color: inherit; text-decoration: none; }
.brand-logos { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.brand-logos img { width: 48px; height: 48px; border-radius: 50%; background: #fff; padding: 2px; object-fit: cover; border: 1px solid var(--border); }
.brand-title, .brand-caption { display: block; }
.brand-title { font-size: 17px; font-weight: 600; line-height: 1.45; }
.brand-caption { font-size: 12px; color: var(--muted); margin-top: 2px; }
.header-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--soft); color: var(--primary); display: grid; place-items: center; font-weight: 600; font-size: 13px; flex-shrink: 0; }
.user-meta { line-height: 1.35; font-size: 13px; }
.user-meta span { display: block; font-size: 11px; color: var(--muted); }

/* ── Layout ── */
.page { max-width: 1200px; margin: 0 auto; padding: 28px 32px 40px; }
.page-footer { margin-top: 28px; padding-top: 16px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 12px; color: var(--muted); }
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 12px 20px; flex-wrap: wrap; margin-bottom: 16px; }
.panel { background: var(--paper); border: 1px solid var(--border); border-radius: var(--radius); padding: 25px; min-width: 0; }
.stack { display: grid; gap: 24px; }
.chip { font-size: 12px; color: var(--primary); background: var(--soft); padding: 4px 10px; border-radius: 6px; display: inline-block; white-space: nowrap; }

/* ── Buttons ── */
.btn { font: 500 14px/1.5 var(--font); display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 10px 17px; border: 1px solid var(--border); border-radius: 10px; background: var(--paper); color: var(--text); text-decoration: none; cursor: pointer; }
.btn:hover { background: var(--soft); }
.btn:focus-visible, .district:focus-visible, .input:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
.btn:disabled { opacity: .65; cursor: progress; }
.btn-primary { background: var(--primary); color: var(--on-primary); border-color: var(--primary); }
.btn-primary:hover { background: var(--primary); filter: brightness(.93); }
.btn-quiet { background: transparent; color: var(--primary); }
.btn-danger { background: transparent; color: var(--danger); border-color: var(--danger-line); }
.btn-danger:hover { background: var(--danger-soft); }
.btn-danger-solid { background: var(--danger); color: var(--paper); border-color: var(--danger); }
.btn-danger-solid:hover { background: var(--danger); filter: brightness(.93); }
.btn-sm { font-size: 12.5px; padding: 6px 11px; min-height: 36px; border-radius: 8px; }
.btn-icon { padding: 6px; min-width: 36px; }
.btn-block { width: 100%; }
.btn-on-dark { background: transparent; color: var(--on-dark); border-color: #ffffff40; }
.btn-on-dark:hover { background: #ffffff14; }
@media (pointer: coarse) { .btn-sm { min-height: 44px; } }

/* ── Forms ── */
.form { display: grid; gap: 17px; }
.label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 7px; }
.req { color: var(--danger); }
.input { font: 400 16px/1.5 var(--font); color: var(--text); background: var(--paper); border: 1px solid var(--border); border-radius: 10px; padding: 11px 13px; width: 100%; min-width: 0; }
.input::placeholder { color: var(--muted); opacity: .85; font-size: 14px; }
.field { display: flex; align-items: center; gap: 10px; background: var(--paper); border: 1px solid var(--border); border-radius: 10px; padding-left: 13px; color: var(--muted); }
.field:focus-within { outline: 2px solid var(--primary); outline-offset: 2px; }
.field .input { border: 0; padding-left: 0; background: transparent; outline: none; }
.eye { border: 0; background: transparent; color: var(--muted); min-width: 44px; min-height: 44px; cursor: pointer; font-size: 15px; }
.eye:hover { color: var(--primary); }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.span-all { grid-column: 1 / -1; }

/* ── Alerts ── */
.alerts { display: grid; gap: 10px; margin-bottom: 20px; }
.alert { display: flex; align-items: flex-start; gap: 10px; padding: 12px 16px; border-radius: 10px; font-size: 14px; border: 1px solid var(--border); background: var(--soft); color: var(--primary); }
.alert i { margin-top: 4px; }
.alert-error { background: var(--danger-soft); color: var(--danger); border-color: var(--danger-line); }
.alert-warn { background: var(--warn-soft); color: var(--warn); border-color: var(--warn-line); }
.alert p { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.alert .alert-close { border: 0; background: transparent; color: inherit; cursor: pointer; padding: 2px 4px; font-size: 15px; }

/* ── Login page hero ── */
.hero { display: grid; grid-template-columns: minmax(0, 1fr) 360px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); margin-bottom: 30px; background: var(--paper); }
.hero-intro { padding: 38px; color: var(--on-dark); background: var(--dark); position: relative; overflow: hidden; display: flex; flex-direction: column; justify-content: space-between; gap: 32px; }
.hero-intro::after { content: ''; width: 220px; height: 220px; border: 1px solid #d4c39922; border-radius: 50%; position: absolute; bottom: -125px; right: -65px; box-shadow: 0 0 0 35px #d4c39908, 0 0 0 70px #d4c39908; pointer-events: none; }
.hero-intro .eyebrow { color: var(--gold); }
.hero-intro h1 { font-size: 34px; max-width: 440px; }
.hero-sub { color: var(--on-dark-muted); margin-top: 12px; max-width: 380px; }
.hero-total { display: flex; align-items: center; gap: 20px; padding-top: 26px; border-top: 1px solid #ffffff29; position: relative; z-index: 1; }
.total-number { font: 600 56px/1.05 var(--font); letter-spacing: -1px; color: var(--gold); font-variant-numeric: tabular-nums; }
.hero-total .muted-on-dark { color: var(--on-dark-muted); font-size: 12px; }
.hero-login { padding: 30px; min-width: 0; }
.login-head { margin-bottom: 22px; }
.login-head h2 { font-size: 23px; margin-bottom: 4px; }
.admin-link { font-size: 13px; margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--border); display: flex; align-items: center; justify-content: center; gap: 7px; min-height: 44px; color: var(--muted); text-decoration: none; }
.admin-link:hover { color: var(--primary); }

/* ── District grid (login) ── */
.districts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.district { font: 400 13.5px/1.5 var(--font); color: var(--text); display: flex; align-items: center; justify-content: space-between; gap: 9px; padding: 14px 14px; border: 1px solid var(--border); border-radius: 12px; background: var(--paper); text-align: left; min-width: 0; cursor: pointer; }
.district:hover { background: var(--soft); border-color: var(--primary); }
.district-name { display: flex; align-items: center; gap: 9px; min-width: 0; overflow-wrap: anywhere; }
.district-name i { color: var(--primary); flex-shrink: 0; }
.district.is-empty .district-name i { color: var(--muted); opacity: .6; }
.district-count { font-weight: 600; color: var(--primary); white-space: nowrap; font-size: 18px; line-height: 1.2; text-align: right; font-variant-numeric: tabular-nums; }
.district.is-empty .district-count { color: var(--muted); }
.district-unit { display: block; font-weight: 400; font-size: 11px; color: var(--muted); margin-top: 3px; }

/* ── Banner (member/admin) ── */
.banner { background: var(--dark); color: var(--on-dark); border-radius: var(--radius); padding: 27px 30px; display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; margin-bottom: 24px; }
.banner h1 { font-size: 29px; margin-bottom: 6px; }
.banner .eyebrow { color: var(--gold); }
.banner-sub { color: var(--on-dark-muted); }
.banner-stat { display: flex; align-items: baseline; gap: 10px; color: var(--gold); white-space: nowrap; }
.banner-stat .total-number { font-size: 44px; }

/* ── Upload ── */
.upload-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 28px; margin-top: 22px; }
.dropzone { position: relative; background: var(--soft); border: 1.5px dashed var(--primary); border-radius: 12px; padding: 22px; display: grid; gap: 10px; align-content: start; }
.dropzone.is-over { background: var(--paper); }
.dropzone-title { display: flex; align-items: center; gap: 10px; color: var(--primary); font-weight: 500; }
.dropzone-title i { font-size: 20px; }
.dropzone .input { font-size: 13px; padding: 9px; }
.file-list { font-size: 12.5px; color: var(--muted); display: grid; gap: 4px; overflow-wrap: anywhere; }
.file-list .bad { color: var(--danger); }
.form-footer { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; border-top: 1px solid var(--border); padding-top: 19px; margin-top: 22px; }

/* ── Tables ── */
.table-panel { background: var(--paper); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.table-head { padding: 20px 24px; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-bottom: 1px solid var(--border); }
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.table th { background: var(--soft); font-size: 12px; font-weight: 500; color: var(--muted); text-align: left; padding: 11px 16px; border-bottom: 1px solid var(--border); white-space: nowrap; }
.table td { padding: 14px 16px; border-bottom: 1px solid var(--border); vertical-align: top; }
.table tbody tr:last-child td { border-bottom: 0; }
.table tbody tr:hover { background: var(--soft); }
.table .col-no { width: 44px; color: var(--muted); font-variant-numeric: tabular-nums; }
.table .col-course { min-width: 200px; max-width: 340px; overflow-wrap: anywhere; }
.table .sub { color: var(--muted); font-size: 11.5px; overflow-wrap: anywhere; margin-top: 4px; }
.filetype { display: inline-block; font-size: 10px; font-weight: 600; color: var(--primary); background: var(--soft); border: 1px solid var(--border); border-radius: 5px; padding: 1px 6px; margin-right: 6px; vertical-align: 1px; }
.filetype.pdf { color: var(--danger); background: var(--danger-soft); border-color: var(--danger-line); }
.actions { display: flex; gap: 6px; flex-wrap: wrap; }
.empty { padding: 36px 20px; text-align: center; color: var(--muted); }
.empty i { font-size: 30px; opacity: .45; display: block; margin-bottom: 10px; }
.empty h3 { color: var(--text); }

/* ── Admin ── */
.admin-districts { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; margin-bottom: 26px; }
.district-card { border: 1px solid var(--border); border-radius: 12px; background: var(--paper); padding: 14px; min-width: 0; display: grid; gap: 8px; }
.district-card.is-active { border-color: var(--primary); box-shadow: inset 0 0 0 1px var(--primary); }
.district-card-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 13px; }
.district-card-top i { color: var(--primary); }
.district-card.is-empty .district-card-top i { color: var(--muted); opacity: .6; }
.district-value { font-size: 23px; font-weight: 600; color: var(--primary); line-height: 1.2; font-variant-numeric: tabular-nums; }
.district-card.is-empty .district-value { color: var(--muted); }
.district-value small { font-weight: 400; color: var(--muted); font-size: 11px; margin-left: 6px; }
.district-card .actions .btn-sm { padding: 5px 9px; font-size: 12px; }
.filters { display: grid; grid-template-columns: 210px minmax(0, 1fr) auto; align-items: end; gap: 12px; padding: 18px 24px; border-bottom: 1px solid var(--border); }
.filters .input { font-size: 14px; padding: 10px 12px; }
.filters .label { font-size: 12px; }
.filters .actions { flex-wrap: nowrap; }

.admin-login { display: grid; grid-template-columns: minmax(0, 1fr) 380px; max-width: 920px; margin: 12px auto 0; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--paper); }
.admin-intro { background: var(--dark); color: var(--on-dark); padding: 42px 36px; display: flex; flex-direction: column; justify-content: space-between; gap: 32px; }
.admin-intro .eyebrow { color: var(--gold); }
.admin-intro h1 { font-size: 32px; margin-bottom: 14px; }
.admin-intro p { color: var(--on-dark-muted); }
.admin-intro .brand-logos img { width: 56px; height: 56px; border-color: #ffffff30; }
.admin-person { padding-top: 24px; border-top: 1px solid #ffffff29; }
.admin-person strong { display: block; font-size: 16px; font-weight: 500; color: var(--gold); margin-bottom: 3px; }
.admin-login .hero-login { padding: 34px; }

/* ── Dialogs ── */
.dialog { font: 400 14.5px/1.65 var(--font); width: calc(100% - 32px); max-width: 560px; background: var(--paper); color: var(--text); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; max-height: 88vh; overflow: auto; }
.dialog.wide { max-width: 900px; }
.dialog::backdrop { background: #17232899; backdrop-filter: blur(3px); }
.dialog-head { display: flex; justify-content: space-between; gap: 14px; align-items: flex-start; margin-bottom: 16px; }
.dialog-head p { margin-top: 2px; }
.dialog-buttons { display: flex; justify-content: flex-end; gap: 10px; flex-wrap: wrap; margin-top: 22px; border-top: 1px solid var(--border); padding-top: 17px; }
.dialog-summary { background: var(--soft); padding: 12px 16px; border-radius: 10px; color: var(--primary); margin-bottom: 14px; }
.preview-box { background: var(--soft); border-radius: 12px; overflow: hidden; display: grid; place-items: center; min-height: 240px; }
.preview-box img { max-width: 100%; max-height: 70vh; display: block; }
.preview-box iframe { width: 100%; height: 70vh; border: 0; background: #fff; }
.loading { display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 44px 0; color: var(--muted); }
.spinner { width: 36px; height: 36px; border: 4px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Responsive ── */
@media (max-width: 1000px) {
    .admin-districts { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
    .app-header { padding: 16px 24px; }
    .page { padding: 24px 24px 36px; }
    .hero { grid-template-columns: minmax(0, 1fr) 320px; }
    .hero-intro { padding: 28px; }
    .hero-intro h1 { font-size: 28px; }
    .districts { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .admin-districts { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .filters { grid-template-columns: 180px minmax(0, 1fr); }
    .filters .actions { grid-column: 1 / -1; }
    .admin-login { grid-template-columns: minmax(0, 1fr) 330px; }
    .admin-intro { padding: 30px; }
}
@media (max-width: 680px) {
    .hero, .upload-grid, .admin-login { grid-template-columns: 1fr; }
    .hero-intro { gap: 22px; }
    .upload-grid { gap: 20px; }
    .districts, .admin-districts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .banner { padding: 24px; }
    .banner h1 { font-size: 25px; }
    .user-meta { display: none; }
    .table-head, .filters { padding: 16px 18px; }
}
@media (max-width: 460px) {
    .app-header { padding: 14px 16px; }
    .page { padding: 18px 16px 30px; }
    .brand-logos img { width: 40px; height: 40px; }
    .brand-title { font-size: 15px; }
    .brand-caption { font-size: 11px; }
    .districts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .district { padding: 12px 10px; font-size: 12.5px; }
    .district-name i { display: none; }
    .hero-intro, .hero-login, .admin-intro, .admin-login .hero-login { padding: 24px 20px; }
    .hero-intro h1 { font-size: 26px; }
    .total-number { font-size: 44px; }
    .grid-2, .filters { grid-template-columns: 1fr; }
    .panel { padding: 20px; }
    .form-footer .btn { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
    .spinner { animation-duration: 2s; }
}