:root {
  --paper: #f1eee5;
  --paper-light: #fbfaf5;
  --ink: #181815;
  --muted: #68665e;
  --line: #d5d0c4;
  --blue: #1f3bd7;
  --blue-dark: #1429a8;
  --red: #ee5a42;
  --yellow: #f2c94c;
  --green: #1e7451;
  --white: #fffef9;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: Arial, Helvetica, sans-serif; }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid var(--yellow); outline-offset: 3px; }
[hidden] { display: none !important; }
.page-width { width: calc(100% - 36px); max-width: 1180px; margin-inline: auto; }

.hero-shell { min-height: 510px; position: relative; overflow: hidden; background: var(--blue); color: var(--white); }
.hero-grid-pattern { position: absolute; inset: 0; background-image: linear-gradient(#ffffff12 1px, transparent 1px), linear-gradient(90deg, #ffffff12 1px, transparent 1px); background-size: 42px 42px; mask-image: linear-gradient(#000, transparent 95%); }
.hero-grid { min-height: 510px; padding-block: 64px 96px; display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(270px, .65fr); gap: 44px; position: relative; }
.hero-copy { align-self: center; max-width: 800px; }
.eyebrow, .step-kicker { margin: 0 0 16px; color: #dfe4ff; letter-spacing: .16em; text-transform: uppercase; font-size: .76rem; font-weight: 800; }
.eyebrow.dark { color: var(--blue); }
.hero-copy h1 { max-width: 850px; margin: 0; font: 400 clamp(3.2rem, 7.4vw, 6.7rem)/.89 Georgia, "Times New Roman", serif; letter-spacing: -.065em; }
.hero-instruction { margin: 36px 0 0; padding: 5px 0 5px 18px; border-left: 5px solid var(--yellow); font-size: clamp(1.12rem, 2vw, 1.5rem); font-weight: 700; }
.hero-art { aspect-ratio: 1; align-self: center; position: relative; isolation: isolate; }
.art-year { position: absolute; z-index: -1; top: 12%; right: 0; color: #ffffff1a; font: 400 clamp(10rem, 22vw, 19rem)/.8 Georgia, serif; letter-spacing: -.14em; }
.art-circle { position: absolute; width: 48%; height: 48%; top: 16%; right: 12%; border-radius: 50%; background: var(--yellow); }
.art-line { position: absolute; width: 82%; height: 22%; left: 6%; bottom: 20%; rotate: -11deg; background: var(--red); }
.art-caption { position: absolute; right: 4%; bottom: 10%; font-size: .72rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }

.booking-shell { position: relative; z-index: 2; margin-top: -54px; }
.booking-card, .confirmation-card { border: 1px solid #17171420; background: var(--paper-light); box-shadow: 0 24px 80px #211f1821; }
.availability-bar { min-height: 78px; padding: 18px 30px; display: flex; align-items: center; justify-content: space-between; background: var(--ink); color: var(--white); }
.availability-number { color: var(--yellow); font: 400 2rem/1 Georgia, serif; }
.availability-bar div span { font-weight: 700; }
.availability-total { color: #c9c6bd; font-size: .86rem; }
.identity-section, .date-section { padding: 48px; }
.date-section { border-top: 1px solid var(--line); scroll-margin-top: 20px; }
.section-heading { display: flex; align-items: flex-start; gap: 18px; margin-bottom: 30px; }
.step-number { width: 38px; height: 38px; flex: none; display: inline-flex; align-items: center; justify-content: center; border-radius: 50%; background: var(--yellow); font-size: .75rem; font-weight: 900; }
.step-kicker { margin-bottom: 5px; color: var(--blue); }
.section-heading h2, .confirmation-card h2, .maintenance-card h2 { margin: 0; font: 400 clamp(2rem, 4vw, 3rem)/1 Georgia, serif; letter-spacing: -.04em; }
.field-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(220px, .5fr); gap: 18px; }
.field-label { display: grid; gap: 9px; }
.field-label > span { font-size: .8rem; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.field-label input { width: 100%; min-height: 58px; padding: 14px 16px; border: 1px solid #bbb6aa; border-radius: 0; background: var(--white); color: var(--ink); }
.privacy-note, .arrival-note { color: var(--muted); font-size: .82rem; line-height: 1.55; }
.privacy-note { margin: 14px 0 22px; }
.primary-button, .secondary-button { min-height: 52px; padding: 13px 20px; display: inline-flex; justify-content: center; align-items: center; gap: 18px; border: 0; cursor: pointer; text-decoration: none; font-weight: 800; transition: transform .15s, background .15s; }
.primary-button { background: var(--blue); color: var(--white); }
.primary-button:hover:not(:disabled) { background: var(--blue-dark); transform: translateY(-1px); }
.primary-button:disabled { cursor: not-allowed; opacity: .5; }
.secondary-button { border: 1px solid var(--ink); background: transparent; color: var(--ink); }
.secondary-button:hover { background: var(--ink); color: var(--white); }
.text-link { border: 0; padding: 4px 0; background: transparent; color: var(--blue); cursor: pointer; font-weight: 700; text-decoration: underline; text-underline-offset: 4px; }
.error-banner { margin: 18px 0; padding: 13px 15px; border-left: 4px solid var(--red); background: #ffe5df; color: #792617; line-height: 1.45; }
.success-banner { margin: 18px 0; padding: 13px 15px; border-left: 4px solid var(--green); background: #e3f1e8; color: #17533a; line-height: 1.45; }

.identity-summary { margin: -10px 0 26px 56px; color: var(--green); font-size: .84rem; font-weight: 800; }
.date-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.date-option { min-height: 170px; padding: 16px; display: flex; flex-direction: column; align-items: flex-start; border: 1px solid var(--line); background: var(--white); color: var(--ink); cursor: pointer; text-align: left; transition: border-color .15s, transform .15s, box-shadow .15s; }
.date-option:hover:not(:disabled) { border-color: var(--blue); transform: translateY(-2px); box-shadow: 0 8px 28px #1d3ae81a; }
.date-option.is-selected { border-color: var(--blue); background: var(--blue); color: var(--white); }
.date-option.is-full { background: #e8e5dc; color: #77746b; cursor: not-allowed; }
.date-index { opacity: .55; font-size: .68rem; font-weight: 900; letter-spacing: .1em; }
.date-main { margin-top: 22px; font: 400 2.15rem/1 Georgia, serif; letter-spacing: -.05em; }
.date-year { margin-top: 2px; font-size: .72rem; font-weight: 800; letter-spacing: .08em; }
.vacancy-pill { margin-top: auto; padding: 5px 8px; background: #dcebdc; color: #165d3c; font-size: .7rem; font-weight: 900; text-transform: uppercase; }
.is-selected .vacancy-pill { background: var(--yellow); color: var(--ink); }
.vacancy-pill.full { background: #d8d4ca; color: #66635c; }
.choice-summary { margin-top: 24px; padding: 24px; display: flex; justify-content: space-between; align-items: center; background: var(--ink); color: var(--white); }
.choice-summary > div { display: grid; gap: 4px; }
.choice-summary span, .choice-summary small { color: #c9c7bd; font-size: .76rem; }
.choice-summary strong { font: 400 1.35rem/1.2 Georgia, serif; }
.confirm-button { flex: none; background: var(--yellow); color: var(--ink); }
.confirm-button:hover:not(:disabled) { background: #ffda68; }
.arrival-note { margin: 18px 0 0; }

.maintenance-card { min-height: 280px; padding: 48px; display: flex; align-items: flex-start; gap: 24px; }
.maintenance-card p:last-child { max-width: 700px; color: var(--muted); line-height: 1.6; }
.maintenance-mark { margin-top: 3px; color: var(--red); font-size: 2rem; }
.confirmation-card { max-width: 760px; margin-inline: auto; padding: 60px; text-align: center; }
.confirmation-mark { width: 64px; height: 64px; margin-bottom: 24px; display: inline-flex; align-items: center; justify-content: center; border-radius: 50%; background: var(--green); color: var(--white); font-size: 2rem; }
.confirmation-lead { margin: 28px 0 6px; color: var(--muted); }
.confirmation-date { margin: 0; color: var(--blue); font: 400 clamp(1.7rem, 4vw, 2.6rem)/1.1 Georgia, serif; }
.confirmation-details { margin: 34px 0 22px; padding: 22px 0; display: grid; grid-template-columns: repeat(3, 1fr); border-block: 1px solid var(--line); }
.confirmation-details div { padding: 0 14px; }
.confirmation-details div + div { border-left: 1px solid var(--line); }
.confirmation-details dt { margin-bottom: 7px; color: var(--muted); font-size: .69rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.confirmation-details dd { margin: 0; font-weight: 700; }
.confirmation-code { color: var(--blue); font-family: monospace; font-size: 1.05rem; }
.site-footer { padding-block: 32px 48px; display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: .78rem; }
.site-footer p { max-width: 680px; margin: 0; line-height: 1.5; }
.site-footer a { color: inherit; font-weight: 700; }

.admin-page { min-height: 100vh; padding: 44px max(24px, calc(50vw - 590px)) 72px; background: var(--paper); }
.admin-header { padding-bottom: 28px; display: flex; justify-content: space-between; align-items: flex-start; border-bottom: 2px solid var(--ink); }
.admin-header h1 { max-width: 860px; margin: 0; font: 400 clamp(2.2rem, 5vw, 4.5rem)/.95 Georgia, serif; letter-spacing: -.055em; }
.admin-header > div > p:last-child { margin-bottom: 0; color: var(--muted); }
.admin-user { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; white-space: nowrap; font-size: .78rem; }
.admin-manual-entry { margin: 28px 0; padding: 28px; display: grid; grid-template-columns: minmax(240px, .75fr) minmax(0, 1.25fr); gap: 36px; border: 1px solid var(--line); border-top: 8px solid var(--green); background: var(--paper-light); }
.admin-manual-entry h2 { margin: 0; font: 400 clamp(1.8rem, 3vw, 2.6rem)/1 Georgia, serif; letter-spacing: -.04em; }
.admin-manual-entry > div > p:last-child { color: var(--muted); line-height: 1.55; }
.admin-manual-form { display: grid; grid-template-columns: 1fr 220px; gap: 16px; }
.admin-manual-form .field-label:first-child, .admin-manual-form .field-label:nth-child(3), .admin-manual-form .error-banner, .admin-manual-form .success-banner, .admin-manual-form .primary-button { grid-column: 1 / -1; }
.field-label select { width: 100%; min-height: 58px; padding: 14px 16px; border: 1px solid #bbb6aa; border-radius: 0; background: var(--white); color: var(--ink); }
.admin-stats { margin: 28px 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.admin-stats article { min-height: 155px; padding: 22px; display: grid; background: var(--ink); color: var(--white); }
.admin-stats article:nth-child(2) { background: var(--blue); }
.admin-stats article:nth-child(3) { background: var(--yellow); color: var(--ink); }
.admin-stats span, .admin-stats small { font-size: .74rem; font-weight: 700; }
.admin-stats strong { align-self: end; font: 400 3.6rem/.8 Georgia, serif; }
.admin-toolbar { margin: 28px 0; display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.admin-schedule { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.admin-date-card { border: 1px solid var(--line); background: var(--paper-light); }
.admin-date-card > header { padding: 18px 20px; display: flex; align-items: center; justify-content: space-between; background: var(--blue); color: var(--white); }
.admin-date-card > header span { color: #dce2ff; font-size: .68rem; font-weight: 800; letter-spacing: .08em; }
.admin-date-card > header h2 { margin: 3px 0 0; font: 400 1.3rem/1.1 Georgia, serif; }
.admin-date-card > header > strong { font: 400 2rem/1 Georgia, serif; }
.card-capacity { padding: 9px 18px; display: flex; justify-content: space-between; border-bottom: 1px solid var(--line); color: var(--muted); font-size: .72rem; font-weight: 700; }
.student-list { margin: 0; padding: 0; list-style: none; }
.student-list li { min-height: 72px; padding: 12px 18px; display: grid; grid-template-columns: 28px minmax(0, 1fr) auto; align-items: center; gap: 12px; }
.student-list li + li { border-top: 1px solid var(--line); }
.student-list .empty { color: #959186; }
.student-position { width: 28px; height: 28px; display: inline-flex; align-items: center; justify-content: center; border-radius: 50%; background: #e7e3d8; font-size: .7rem; font-weight: 800; }
.student-list li > div { display: grid; gap: 4px; }
.student-list small { color: var(--muted); }
.student-list code { color: var(--blue); font-size: .72rem; }
.student-actions { justify-items: end; }
.student-action-buttons { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 5px; }
.student-action { padding: 5px 7px; border: 1px solid var(--line); background: var(--white); color: var(--blue); cursor: pointer; font-size: .68rem; font-weight: 800; }
.student-action:hover:not(:disabled) { border-color: var(--blue); }
.student-action.danger { color: #a52d1c; }
.student-action.danger:hover:not(:disabled) { border-color: var(--red); background: #fff0ec; }
.student-action:disabled { cursor: wait; opacity: .5; }
.admin-dialog { width: min(calc(100% - 28px), 560px); padding: 0; border: 0; border-top: 8px solid var(--blue); background: var(--paper-light); color: var(--ink); box-shadow: 0 24px 90px #0008; }
.admin-dialog::backdrop { background: #11110f99; }
.admin-dialog form { padding: 32px; display: grid; gap: 20px; }
.admin-dialog h2 { margin: 0; font: 400 2.4rem/1 Georgia, serif; letter-spacing: -.04em; }
.admin-dialog p { margin: 0; line-height: 1.5; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; }
.admin-denied { display: flex; justify-content: center; align-items: center; }
.admin-access-card { width: min(100%, 620px); padding: 42px; border-top: 8px solid var(--blue); background: var(--paper-light); box-shadow: 0 20px 60px #0000001f; }
.admin-access-card h1 { margin: 0 0 20px; font: 400 3rem/1 Georgia, serif; letter-spacing: -.04em; }
.admin-access-card p { line-height: 1.6; }
.admin-login-form { margin: 28px 0 22px; display: grid; gap: 18px; }
.admin-login-form .primary-button { width: 100%; margin-top: 4px; }

@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-art { display: none; }
  .date-grid { grid-template-columns: repeat(3, 1fr); }
  .admin-schedule { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .page-width { width: calc(100% - 24px); }
  .hero-shell, .hero-grid { min-height: 440px; }
  .hero-grid { padding-block: 52px 88px; }
  .hero-copy h1 { font-size: clamp(3.1rem, 16vw, 5rem); }
  .hero-instruction { margin-top: 28px; }
  .booking-shell { margin-top: -42px; }
  .availability-bar { padding: 16px 20px; flex-direction: column; align-items: flex-start; gap: 4px; }
  .identity-section, .date-section, .confirmation-card, .maintenance-card { padding: 28px 20px; }
  .field-grid { grid-template-columns: 1fr; }
  .identity-summary { margin-left: 0; }
  .date-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .date-option { min-height: 154px; padding: 14px; }
  .date-main { font-size: 1.72rem; }
  .choice-summary { flex-direction: column; align-items: stretch; gap: 20px; }
  .confirm-button { width: 100%; }
  .confirmation-details { grid-template-columns: 1fr; }
  .confirmation-details div { padding: 14px 0; }
  .confirmation-details div + div { border-top: 1px solid var(--line); border-left: 0; }
  .site-footer, .admin-header { flex-direction: column; align-items: flex-start; gap: 18px; }
  .admin-page { padding-inline: 14px; }
  .admin-user { align-items: flex-start; }
  .admin-stats { grid-template-columns: 1fr; }
  .admin-manual-entry { grid-template-columns: 1fr; gap: 20px; }
  .admin-manual-form { grid-template-columns: 1fr; }
  .admin-manual-form > * { grid-column: 1 !important; }
  .admin-stats article { min-height: 120px; }
  .admin-toolbar { flex-direction: column; align-items: stretch; }
  .student-list li { grid-template-columns: 28px 1fr; }
  .student-actions { grid-column: 2; justify-items: start; }
  .student-action-buttons { justify-content: flex-start; }
  .dialog-actions { flex-direction: column-reverse; }
}

@media print {
  @page { size: A4; margin: 10mm; }
  body, .admin-page { background: #fff; }
  .admin-toolbar, .admin-user, .admin-manual-entry, .student-action-buttons, .admin-dialog, .site-footer, .hero-shell { display: none !important; }
  .admin-page { padding: 0; }
  .admin-header { margin-bottom: 10mm; }
  .admin-schedule { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .admin-date-card { break-inside: avoid; box-shadow: none; }
  .admin-date-card > header { print-color-adjust: exact; -webkit-print-color-adjust: exact; }
  .confirmation-card { box-shadow: none; border: 1px solid #333; }
}