/* ============================================================
   cert_theme.css
   ระบบเกียรติบัตร — โทนสี "กรมท่า + ทอง" สื่อถึงตราประทับ/ริบบิ้นบนใบเกียรติบัตร
   ใช้ร่วมกันทุกหน้า: index, create, view, verify
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Sarabun:wght@400;500;600;700&display=swap');

:root {
    --cert-navy: #1B2A4A;
    --cert-navy-deep: #101a30;
    --cert-navy-soft: #EFF2F7;
    --cert-gold: #B8860B;
    --cert-gold-bright: #C9972E;
    --cert-gold-soft: #FBF1DC;
    --cert-bg: #F7F6F3;
    --cert-surface: #FFFFFF;
    --cert-border: #E6E2D8;
    --cert-text: #22262F;
    --cert-text-muted: #6B7180;
    --cert-success: #1F7A4D;
    --cert-success-bg: #E7F5EC;
    --cert-danger: #B3261E;
    --cert-danger-bg: #FCEBEA;
    --cert-radius: 14px;
    --cert-radius-sm: 8px;
    --cert-shadow: 0 1px 2px rgba(27,42,74,.06), 0 8px 24px -12px rgba(27,42,74,.18);
}

.cert-app {
    font-family: 'Sarabun', 'Segoe UI', sans-serif;
    color: var(--cert-text);
    background: var(--cert-bg);
    min-height: 100%;
}

/* Buttons, modals, and form controls use .btn-cert-*, .cert-* classes that read the
   :root variables above, so they render correctly even if Bootstrap relocates
   .modal markup elsewhere in the DOM (outside the .cert-app wrapper). */

.cert-app * { box-sizing: border-box; }

.cert-app :focus-visible {
    outline: 2px solid var(--cert-gold-bright);
    outline-offset: 2px;
}

/* ---------- Layout shell ---------- */
.cert-shell {
    max-width: 780px;
    margin: 0 auto;
    padding: 28px 16px 56px;
}

.cert-back {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: .9rem;
    color: var(--cert-text-muted);
    text-decoration: none;
    margin-bottom: 14px;
}
.cert-back:hover { color: var(--cert-navy); }
.cert-back svg { width: 16px; height: 16px; }

/* ---------- Page header ---------- */
.cert-page-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 24px;
}
.cert-eyebrow {
    font-size: .74rem;
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--cert-gold);
    margin: 0 0 4px;
}
.cert-h1 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--cert-navy);
    margin: 0;
    line-height: 1.25;
}

/* ---------- Buttons ---------- */
.btn-cert-primary,
.btn-cert-outline,
.btn-cert-success,
.btn-cert-danger,
.btn-cert-danger-outline,
.btn-cert-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
    font-weight: 600;
    font-size: .92rem;
    border-radius: var(--cert-radius-sm);
    padding: .55rem 1rem;
    border: 1px solid transparent;
    transition: background-color .15s ease, border-color .15s ease, color .15s ease, transform .05s ease;
    white-space: nowrap;
}
.btn-cert-primary:active,
.btn-cert-outline:active,
.btn-cert-success:active,
.btn-cert-danger:active,
.btn-cert-danger-outline:active,
.btn-cert-ghost:active { transform: translateY(1px); }

.btn-cert-primary {
    background: var(--cert-navy);
    border-color: var(--cert-navy);
    color: #fff;
}
.btn-cert-primary:hover { background: var(--cert-navy-deep); color: #fff; }

.btn-cert-outline {
    background: var(--cert-surface);
    border-color: var(--cert-border);
    color: var(--cert-navy);
}
.btn-cert-outline:hover { border-color: var(--cert-navy); background: var(--cert-navy-soft); color: var(--cert-navy); }

.btn-cert-success {
    background: var(--cert-success);
    border-color: var(--cert-success);
    color: #fff;
}
.btn-cert-success:hover { background: #175f3c; color: #fff; }

.btn-cert-danger {
    background: var(--cert-danger);
    border-color: var(--cert-danger);
    color: #fff;
}
.btn-cert-danger:hover { background: #8f1f19; color: #fff; }

.btn-cert-danger-outline {
    background: var(--cert-surface);
    border-color: var(--cert-border);
    color: var(--cert-danger);
}
.btn-cert-danger-outline:hover { background: var(--cert-danger-bg); border-color: var(--cert-danger); color: var(--cert-danger); }

.btn-cert-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--cert-text-muted);
    padding: .4rem .5rem;
}
.btn-cert-ghost:hover { color: var(--cert-navy); background: var(--cert-navy-soft); }

.btn-cert-sm { padding: .32rem .6rem; font-size: .82rem; }
.btn-cert-lg { padding: .75rem 1.25rem; font-size: 1rem; width: 100%; }
.btn-cert-icon-only { padding: .5rem; }

/* ---------- Cards / surfaces ---------- */
.cert-card {
    background: var(--cert-surface);
    border: 1px solid var(--cert-border);
    border-radius: var(--cert-radius);
    box-shadow: var(--cert-shadow);
}

/* ---------- Activity list (index page) ---------- */
.cert-list { display: flex; flex-direction: column; gap: 10px; }

.cert-activity-row {
    display: flex;
    align-items: stretch;
    gap: 10px;
    background: var(--cert-surface);
    border: 1px solid var(--cert-border);
    border-radius: var(--cert-radius);
    box-shadow: var(--cert-shadow);
    transition: border-color .15s ease, transform .1s ease;
}
.cert-activity-row:hover { border-color: var(--cert-gold-bright); }

.cert-activity-link {
    flex: 1 1 auto;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 8px 16px 18px;
    text-decoration: none;
    color: inherit;
    min-width: 0;
}

.cert-seal {
    flex: none;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--cert-gold-soft);
    color: var(--cert-gold);
    display: flex;
    align-items: center;
    justify-content: center;
}
.cert-seal svg { width: 22px; height: 22px; }

.cert-activity-info { min-width: 0; }
.cert-activity-title {
    font-weight: 600;
    font-size: 1.02rem;
    color: var(--cert-navy);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.cert-activity-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px 10px;
    margin-top: 3px;
    font-size: .82rem;
    color: var(--cert-text-muted);
}
.cert-activity-meta svg { width: 14px; height: 14px; vertical-align: -2px; margin-right: 3px; }

.cert-chevron {
    flex: none;
    align-self: center;
    color: var(--cert-border);
    font-size: 1.4rem;
    padding-right: 6px;
}

.cert-row-actions {
    flex: none;
    display: flex;
    align-items: center;
    padding-right: 10px;
}

/* ---------- Empty state ---------- */
.cert-empty {
    text-align: center;
    padding: 56px 24px;
    background: var(--cert-surface);
    border: 1px dashed var(--cert-border);
    border-radius: var(--cert-radius);
}
.cert-empty-icon {
    width: 56px; height: 56px;
    margin: 0 auto 14px;
    border-radius: 50%;
    background: var(--cert-navy-soft);
    color: var(--cert-navy);
    display: flex; align-items: center; justify-content: center;
}
.cert-empty-icon svg { width: 28px; height: 28px; }
.cert-empty-title { font-weight: 600; color: var(--cert-navy); margin-bottom: 2px; }
.cert-empty-sub { color: var(--cert-text-muted); font-size: .92rem; margin-bottom: 18px; }

/* ---------- Steps (create page) ---------- */
.cert-step {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}
.cert-step-num {
    flex: none;
    width: 26px; height: 26px;
    border-radius: 50%;
    background: var(--cert-navy);
    color: #fff;
    font-size: .82rem;
    font-weight: 700;
    display: flex; align-items: center; justify-content: center;
}
.cert-step-label { font-weight: 600; color: var(--cert-navy); font-size: 1.02rem; }

/* ---------- Form controls ---------- */
.cert-app .form-control,
.cert-app .form-select {
    font-family: inherit;
    border: 1px solid var(--cert-border);
    border-radius: var(--cert-radius-sm);
    padding: .55rem .75rem;
}
.cert-app .form-control:focus,
.cert-app .form-select:focus {
    border-color: var(--cert-navy);
    box-shadow: 0 0 0 3px rgba(27,42,74,.12);
}
.cert-app .form-control-lg { font-size: 1.05rem; padding: .7rem .9rem; }

/* ---------- Picker table (student selection) ---------- */
.cert-picker {
    border: 1px solid var(--cert-border);
    border-radius: var(--cert-radius);
    overflow: hidden;
    background: var(--cert-surface);
}
.cert-picker-scroll { max-height: 380px; overflow-y: auto; }
.cert-picker table { margin: 0; }
.cert-picker thead th {
    position: sticky; top: 0;
    background: var(--cert-navy-soft);
    color: var(--cert-navy);
    font-size: .82rem;
    font-weight: 600;
    border-bottom: 1px solid var(--cert-border);
}
.cert-picker tbody tr:hover { background: var(--cert-gold-soft); }
.cert-picker td, .cert-picker th { padding: .55rem .7rem; vertical-align: middle; }
.cert-pick-count {
    font-size: .85rem;
    color: var(--cert-text-muted);
    padding: 8px 2px 0;
}

/* ---------- Results table (view page) ---------- */
.cert-table-wrap {
    border: 1px solid var(--cert-border);
    border-radius: var(--cert-radius);
    overflow: hidden;
    background: var(--cert-surface);
}
.cert-table-wrap table { margin: 0; }
.cert-table-wrap thead th {
    background: var(--cert-navy-soft);
    color: var(--cert-navy);
    font-size: .82rem;
    font-weight: 600;
    border-bottom: 1px solid var(--cert-border);
    white-space: nowrap;
}
.cert-table-wrap td { vertical-align: middle; }
.cert-table-wrap tbody tr:not(:last-child) td { border-bottom: 1px solid var(--cert-border); }

.cert-no-chip {
    display: inline-block;
    font-family: 'Sarabun', monospace;
    font-weight: 700;
    font-size: .84rem;
    letter-spacing: .01em;
    color: var(--cert-gold);
    background: var(--cert-gold-soft);
    border-radius: 6px;
    padding: .28rem .55rem;
    white-space: nowrap;
}

.cert-link-verify {
    font-size: .85rem;
    color: var(--cert-navy);
    text-decoration: none;
    font-weight: 600;
}
.cert-link-verify:hover { text-decoration: underline; }
.cert-link-copy {
    font-size: .8rem;
    color: var(--cert-text-muted);
    background: none;
    border: none;
    padding: 0;
    margin-left: 8px;
    cursor: pointer;
    text-decoration: underline dotted;
}
.cert-link-copy:hover { color: var(--cert-navy); }

/* ---------- Chips / badges ---------- */
.cert-chip-muted {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: .82rem;
    color: var(--cert-text-muted);
    background: var(--cert-navy-soft);
    border-radius: 999px;
    padding: .22rem .65rem;
}

/* ---------- Alerts ---------- */
.cert-app .alert-success {
    background: var(--cert-success-bg);
    border: 1px solid #bfe3cd;
    color: #175f3c;
    border-radius: var(--cert-radius-sm);
}
.cert-app .alert-danger {
    background: var(--cert-danger-bg);
    border: 1px solid #f0c4c1;
    color: var(--cert-danger);
    border-radius: var(--cert-radius-sm);
}

/* ---------- Modal refinement ---------- */
.cert-app .modal-content {
    border: none;
    border-radius: var(--cert-radius);
    overflow: hidden;
}
.cert-app .modal-header {
    background: var(--cert-navy-soft);
    border-bottom: 1px solid var(--cert-border);
    padding: 1rem 1.25rem;
}
.cert-app .modal-title { color: var(--cert-navy); font-weight: 700; font-size: 1.05rem; }
.cert-app .modal-body { padding: 1.25rem; }
.cert-app .modal-footer { border-top: 1px solid var(--cert-border); padding: .9rem 1.25rem; }

/* ---------- Verify (public) page ---------- */
.cert-verify-shell { max-width: 480px; margin: 48px auto; padding: 0 16px 48px; }
.cert-verify-card {
    background: var(--cert-surface);
    border-radius: 18px;
    box-shadow: var(--cert-shadow);
    overflow: hidden;
    border: 1px solid var(--cert-border);
}
.cert-verify-band {
    height: 6px;
    background: linear-gradient(90deg, var(--cert-gold) 0%, var(--cert-gold-bright) 50%, var(--cert-gold) 100%);
}
.cert-verify-band.is-bad { background: var(--cert-danger); }
.cert-verify-body { padding: 32px 28px; text-align: center; }
.cert-verify-icon {
    width: 64px; height: 64px;
    border-radius: 50%;
    margin: 0 auto 16px;
    display: flex; align-items: center; justify-content: center;
}
.cert-verify-icon.is-ok { background: var(--cert-success-bg); color: var(--cert-success); }
.cert-verify-icon.is-bad { background: var(--cert-danger-bg); color: var(--cert-danger); }
.cert-verify-icon svg { width: 32px; height: 32px; }
.cert-verify-status { font-weight: 700; font-size: 1.15rem; margin-bottom: 4px; }
.cert-verify-status.is-ok { color: var(--cert-success); }
.cert-verify-status.is-bad { color: var(--cert-danger); }
.cert-verify-sub { color: var(--cert-text-muted); font-size: .88rem; margin-bottom: 22px; }

.cert-verify-details {
    text-align: left;
    border-top: 1px dashed var(--cert-border);
    padding-top: 18px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.cert-verify-row { display: flex; justify-content: space-between; gap: 16px; font-size: .9rem; }
.cert-verify-row dt { color: var(--cert-text-muted); font-weight: 500; flex: none; }
.cert-verify-row dd { margin: 0; text-align: right; font-weight: 600; color: var(--cert-text); }
.cert-verify-row.is-highlight dd { color: var(--cert-gold); font-family: 'Sarabun', monospace; }

.cert-verify-footer {
    text-align: center;
    font-size: .76rem;
    color: var(--cert-text-muted);
    padding: 14px 20px;
    background: var(--cert-navy-soft);
    border-top: 1px solid var(--cert-border);
}

@media (max-width: 480px) {
    .cert-h1 { font-size: 1.35rem; }
    .cert-verify-body { padding: 26px 18px; }
}