:root {
    --navy: #0b2545;
    --navy-light: #13315c;
    --gold: #d4a017;
    --gold-light: #f0c14b;
    --bg: #f4f6fa;
    --text: #1d2b3a;
    --muted: #6b7a8d;
    --line: #dde3ec;
    --success: #1f9254;
    --danger: #c0392b;
    --warning: #b8860b;
    --info: #1c6ea4;
    --radius: 14px;
    --shadow: 0 6px 24px rgba(11, 37, 69, .1);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Chakra Petch', 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
}

a { color: var(--navy-light); }

/* ---------------- Navbar ---------------- */
.navbar {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 24px;
    background: linear-gradient(120deg, var(--navy) 0%, var(--navy-light) 100%);
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: 0 2px 12px rgba(0, 0, 0, .2);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    text-decoration: none;
    font-size: 1.15rem;
    letter-spacing: .5px;
}

.navbar-brand i { color: var(--gold-light); }
.navbar-brand strong { color: var(--gold-light); }

.navbar-links {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: auto;
    flex-wrap: wrap;
}

.navbar-links a {
    color: #e8eef7;
    text-decoration: none;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: .95rem;
}

.navbar-links a:hover { background: rgba(255, 255, 255, .12); }
.navbar-links a.active { background: rgba(255, 255, 255, .18); color: #fff; }

.navbar-links a.btn-nav {
    background: var(--gold);
    color: #23180a;
    font-weight: 600;
}

.navbar-links a.btn-nav:hover { background: var(--gold-light); }

.nav-toggle {
    display: none;
    margin-left: auto;
    background: none;
    border: 0;
    color: #fff;
    font-size: 1.3rem;
    cursor: pointer;
}

/* ---------------- Layout ---------------- */
.page { min-height: calc(100vh - 260px); padding: 28px 0 60px; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 18px; }
.container-wide { width: 90%; max-width: none; margin: 0 auto; padding: 0; }
.container-narrow { max-width: 620px; margin: 0 auto; padding: 0 18px; }

.card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 22px;
    overflow: hidden;
}

.card-header {
    background: linear-gradient(120deg, var(--navy) 0%, var(--navy-light) 100%);
    color: #fff;
    padding: 14px 20px;
    font-size: 1.05rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-header i { color: var(--gold-light); }
.card-body { padding: 22px; }

/* ---------------- Hero ---------------- */
.hero {
    background: linear-gradient(120deg, var(--navy) 0%, var(--navy-light) 60%, #1b4570 100%);
    color: #fff;
    padding: 56px 18px 64px;
    text-align: center;
}

.hero .eyebrow {
    display: inline-block;
    border: 1px solid var(--gold-light);
    color: var(--gold-light);
    border-radius: 999px;
    padding: 4px 18px;
    font-size: .85rem;
    letter-spacing: 1px;
    margin-bottom: 14px;
}

.hero h1 { font-size: 2.25rem; margin: 0 0 8px; line-height: 1.3; }
.hero h2 { font-size: 1.1rem; font-weight: 400; margin: 0 0 24px; color: #cfe0f5; }

.hero-actions {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 10px;
}

.hero-deadline {
    margin-top: 26px;
    font-size: .95rem;
    color: #e6eefb;
}

.hero-deadline strong { color: var(--gold-light); }

/* ---------------- Choice cards ---------------- */
.choice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: -38px;
}

.choice {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 26px 24px;
    text-align: center;
    border-top: 5px solid var(--gold);
    display: flex;
    flex-direction: column;
}

.choice i.choice-icon {
    font-size: 2.2rem;
    color: var(--navy-light);
    margin-bottom: 10px;
}

.choice h3 { margin: 0 0 8px; font-size: 1.2rem; }
.choice p { color: var(--muted); font-size: .95rem; margin: 0 0 18px; flex: 1; }

/* ---------------- Buttons ---------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 0;
    border-radius: 10px;
    padding: 11px 22px;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}

.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-light); }
.btn-gold { background: var(--gold); color: #23180a; }
.btn-gold:hover { background: var(--gold-light); }
.btn-outline { background: transparent; border: 2px solid var(--navy); color: var(--navy); }
.btn-outline:hover { background: var(--navy); color: #fff; }
.btn-light { background: #fff; color: var(--navy); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-sm { padding: 6px 13px; font-size: .85rem; border-radius: 8px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }

/* ---------------- Forms ---------------- */
.form-group { margin-bottom: 16px; }

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 6px;
    font-size: .95rem;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 10px;
    font-family: inherit;
    font-size: .98rem;
    background: #fff;
    color: var(--text);
}

.form-control:focus {
    outline: none;
    border-color: var(--navy-light);
    box-shadow: 0 0 0 3px rgba(19, 49, 92, .12);
}

textarea.form-control { min-height: 84px; resize: vertical; }

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 0 18px;
}

.form-hint { font-size: .85rem; color: var(--muted); margin-top: 4px; }
.required { color: var(--danger); }

.form-control-sm { padding: 6px 9px; font-size: .86rem; border-radius: 8px; width: auto; min-width: 110px; }

.inline-form {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 6px;
}

.inline-form:last-child { margin-bottom: 0; }

.section-title {
    margin: 26px 0 14px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--line);
    font-size: 1.1rem;
    color: var(--navy);
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title:first-child { margin-top: 0; }

/* ---------------- Alerts / badges ---------------- */
.alert {
    border-radius: 10px;
    padding: 12px 16px;
    margin-bottom: 18px;
    font-size: .95rem;
    border-left: 5px solid;
}

.alert-success { background: #e8f6ee; border-color: var(--success); color: #12603a; }
.alert-danger, .alert-error { background: #fdeceb; border-color: var(--danger); color: #922018; }
.alert-warning { background: #fdf5e2; border-color: var(--warning); color: #7a5b06; }
.alert-info { background: #e9f2fa; border-color: var(--info); color: #144e75; }

.alert ul { margin: 8px 0 0; padding-left: 20px; }

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: .82rem;
    font-weight: 600;
}

.badge-success { background: #e8f6ee; color: #12603a; }
.badge-danger { background: #fdeceb; color: #922018; }
.badge-warning { background: #fdf5e2; color: #7a5b06; }
.badge-info { background: #e9f2fa; color: #144e75; }

/* ---------------- Tables ---------------- */
.table-wrap { overflow-x: auto; }

table.data {
    width: 100%;
    border-collapse: collapse;
    font-size: .93rem;
    min-width: 720px;
}

table.data th, table.data td {
    border: 1px solid var(--line);
    padding: 8px 10px;
    text-align: left;
    vertical-align: middle;
}

table.data thead th {
    background: var(--navy);
    color: #fff;
    font-weight: 500;
    white-space: nowrap;
}

table.data tbody tr:nth-child(even) { background: #fafbfd; }
table.data .form-control { padding: 6px 8px; font-size: .9rem; border-radius: 6px; }
table.data td.row-no { text-align: center; width: 42px; color: var(--muted); }

/* ---------------- Roster (แบบฟอร์ม O-2) ---------------- */
table.roster-table { min-width: 1700px; font-size: .88rem; }
table.roster-table th, table.roster-table td { padding: 6px 7px; }
table.roster-table .form-control { min-width: 110px; }
table.roster-table td.photo-cell { width: 92px; text-align: center; }
table.roster-table td.photo-cell .form-control { min-width: 0; width: 86px; font-size: .74rem; padding: 4px; }

.person-photo {
    display: block;
    width: 54px;
    height: 68px;
    margin: 0 auto 5px;
    object-fit: cover;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: #f1f4f8;
}

.person-photo-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    color: #9aa6b5;
    font-size: 1.3rem;
}

/* ---------------- Steps ---------------- */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; }

.step {
    background: #fff;
    border-radius: var(--radius);
    padding: 18px;
    box-shadow: var(--shadow);
    border-left: 5px solid var(--line);
}

.step.done { border-left-color: var(--success); }
.step.current { border-left-color: var(--gold); }
.step h4 { margin: 0 0 6px; font-size: 1rem; }
.step p { margin: 0 0 12px; color: var(--muted); font-size: .9rem; }
.step .step-no { font-size: .8rem; color: var(--muted); letter-spacing: 1px; }

/* ---------------- Step tabs ---------------- */
.step-tabs {
    display: flex;
    gap: 8px;
    padding: 8px;
    margin-bottom: 20px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow-x: auto;
}

.step-tab {
    flex: 1 1 0;
    min-width: 200px;
    display: block;
    padding: 10px 14px;
    border-radius: 10px;
    border-top: 3px solid var(--line);
    color: var(--text);
    text-decoration: none;
    transition: background .15s ease, color .15s ease;
}

.step-tab:hover { background: #eef2f8; }
.step-tab.done { border-top-color: var(--success); }
.step-tab.current { border-top-color: var(--gold); }

.step-tab.is-active {
    background: var(--navy);
    color: #fff;
    border-top-color: var(--gold);
}

.step-tab-no { display: block; font-size: .74rem; letter-spacing: 1px; color: var(--muted); }
.step-tab-title { display: block; font-weight: 600; font-size: .96rem; }
.step-tab-note { display: block; font-size: .82rem; color: var(--muted); }
.step-tab.is-active .step-tab-no,
.step-tab.is-active .step-tab-note { color: rgba(255, 255, 255, .78); }

/* ---------------- Regulations ---------------- */
.reg-chapter { margin-bottom: 26px; }

.reg-chapter h3 {
    background: linear-gradient(120deg, var(--navy) 0%, var(--navy-light) 100%);
    color: #fff;
    padding: 10px 18px;
    border-radius: 10px;
    font-size: 1.05rem;
    margin: 0 0 12px;
}

.reg-item { margin-bottom: 12px; }
.reg-item > strong { color: var(--navy); }
.reg-item ul, .reg-item ol { margin: 6px 0; padding-left: 26px; }
.reg-item li { margin-bottom: 4px; }

.toc { display: flex; flex-wrap: wrap; gap: 8px; }

.toc a {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 6px 14px;
    font-size: .88rem;
    text-decoration: none;
    color: var(--navy);
}

.toc a:hover { background: var(--navy); color: #fff; }

/* ---------------- Misc ---------------- */
.page-title { margin: 0 0 6px; font-size: 1.6rem; color: var(--navy); }
.page-subtitle { margin: 0 0 22px; color: var(--muted); }
.muted { color: var(--muted); }
.text-center { text-align: center; }
.mt-2 { margin-top: 14px; }
.mb-0 { margin-bottom: 0; }
.flex-between { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 20px; }

.file-row {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
    flex-wrap: wrap;
}

.file-row:last-child { border-bottom: 0; }
.file-row .file-label { flex: 1 1 260px; }
.file-row .file-state { flex: 0 0 auto; }

.footer {
    background: var(--navy);
    color: #c9d7e8;
    text-align: center;
    padding: 26px 18px;
    font-size: .9rem;
}

.footer p { margin: 3px 0; }
.footer-copy { margin-top: 12px !important; opacity: .7; font-size: .82rem; }

@media (max-width: 820px) {
    .nav-toggle { display: block; }
    .navbar { flex-wrap: wrap; }
    .navbar-links { display: none; width: 100%; margin-left: 0; flex-direction: column; align-items: stretch; }
    .navbar-links.open { display: flex; }
    .navbar-links a { text-align: center; }
    .hero h1 { font-size: 1.6rem; }
    .choice-grid { margin-top: 20px; }
    .container-wide { width: auto; padding: 0 18px; }
}

@media print {
    .navbar, .footer, .actions, .no-print { display: none !important; }
    body { background: #fff; }
    .card { box-shadow: none; border: 1px solid #ccc; }
    .card-header { background: #eee !important; color: #000 !important; }
}