@layer reset, base, components, responsive;

@layer reset {
  html { box-sizing: border-box; }
  *, *::before, *::after { box-sizing: inherit; }
  body, h1, h2, h3, p, dl, dd, fieldset { margin: 0; }
  button, input, select, textarea { font: inherit; }
  button, a, label { -webkit-tap-highlight-color: transparent; }
  img, video, svg { display: block; }
}

@layer base {
  :root {
    color-scheme: dark;
    --canvas: #111416;
    --surface: #1a1f22;
    --input: #23292d;
    --ink: #f2f4f3;
    --muted: #aeb8b5;
    --faint: #7e8986;
    --line: #343c40;
    --line-strong: #4a555a;
    --action: #e86f2d;
    --action-hover: #f27b36;
    --action-ink: #18120e;
    --success: #77c493;
    --warning: #e4a84b;
    --error: #ef8d8d;
    --max: 1040px;
    --radius: 12px;
    --focus: #ffc39e;
    accent-color: var(--action);
  }

  html { min-block-size: 100%; background: var(--canvas); }
  body {
    min-block-size: 100dvb;
    overflow-x: hidden;
    background: var(--canvas);
    color: var(--ink);
    font-family: Aptos, "Segoe UI Variable", "Segoe UI", system-ui, sans-serif;
    font-size: 1rem;
    line-height: 1.5;
    padding-block-end: calc(84px + env(safe-area-inset-bottom));
    text-rendering: optimizeLegibility;
  }

  h1 { font-size: clamp(1.65rem, 1.35rem + 1vw, 2.15rem); line-height: 1.08; letter-spacing: -0.025em; }
  h2 { font-size: 1.15rem; line-height: 1.2; }
  h3 { font-size: 1rem; }
  a { color: inherit; }
  svg { inline-size: 24px; block-size: 24px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.8; }
  :focus:not(:focus-visible) { outline: none; }
  :focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
  ::selection { background: var(--action); color: var(--action-ink); }

  input, select, textarea {
    inline-size: 100%;
    min-block-size: 48px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--input);
    color: var(--ink);
    padding: 11px 13px;
    font-size: 16px;
  }
  input:hover, select:hover, textarea:hover { border-color: var(--line-strong); }
  input:focus-visible, select:focus-visible, textarea:focus-visible { border-color: var(--action); outline: 3px solid color-mix(in srgb, var(--action) 30%, transparent); outline-offset: 0; }
  input::placeholder, textarea::placeholder { color: var(--faint); }
  textarea { min-block-size: 96px; resize: vertical; }
  button { color: inherit; }
  button:disabled { cursor: not-allowed; opacity: .55; }
}

@layer components {
  .app-shell { inline-size: min(100% - 32px, var(--max)); margin-inline: auto; padding-block: 28px 44px; }
  .skip-link { position: fixed; inset-block-start: 8px; inset-inline-start: 8px; z-index: 60; transform: translateY(-150%); border-radius: 8px; background: var(--ink); color: var(--canvas); padding: 10px 14px; font-weight: 750; }
  .skip-link:focus { transform: translateY(0); }
  .app-shell--centered { min-block-size: 100dvb; display: grid; place-items: center; padding-block: 24px; }
  .topbar { block-size: 64px; border-block-end: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; padding-inline: max(16px, calc((100% - var(--max)) / 2)); }
  .brand { display: inline-flex; align-items: center; gap: 10px; min-block-size: 44px; font-weight: 720; text-decoration: none; }
  .brand svg { color: var(--action); }
  .text-button { min-block-size: 44px; border: 0; background: none; color: var(--muted); padding-inline: 10px; cursor: pointer; }
  .text-button:hover { color: var(--ink); }

  .bottom-nav { position: fixed; inset-inline: 0; inset-block-end: 0; z-index: 20; display: grid; grid-template-columns: repeat(4, 1fr); min-block-size: calc(68px + env(safe-area-inset-bottom)); border-block-start: 1px solid var(--line); background: color-mix(in srgb, var(--surface) 96%, transparent); padding: 6px 8px env(safe-area-inset-bottom); backdrop-filter: blur(10px); }
  .bottom-nav a { position: relative; min-block-size: 56px; display: grid; place-items: center; align-content: center; gap: 2px; color: var(--muted); font-size: .72rem; text-decoration: none; border-radius: 8px; }
  .bottom-nav a:hover { color: var(--ink); background: var(--input); }
  .bottom-nav a.is-active { color: var(--action); font-weight: 700; }
  .bottom-nav a.is-active::after { content: ""; position: absolute; inset-block-start: 0; inline-size: 24px; block-size: 2px; background: var(--action); border-radius: 2px; }
  .bottom-nav svg { inline-size: 22px; block-size: 22px; }

  .button { min-block-size: 50px; border: 1px solid transparent; border-radius: 10px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 11px 18px; font-weight: 730; line-height: 1.2; text-decoration: none; cursor: pointer; transition: background-color 140ms ease-out, border-color 140ms ease-out, transform 100ms ease-out; }
  .button:active { transform: scale(.985); }
  .button--primary { background: var(--action); color: var(--action-ink); }
  .button--primary:hover { background: var(--action-hover); }
  .button--secondary { background: var(--surface); border-color: var(--line); color: var(--ink); }
  .button--secondary:hover { background: var(--input); border-color: var(--line-strong); }
  .button--full { inline-size: 100%; }
  .button svg { inline-size: 21px; block-size: 21px; }

  .flow > * + * { margin-block-start: 20px; }
  .flow--tight > * + * { margin-block-start: 7px; }
  .secondary { color: var(--muted); }
  .sr-only { position: absolute; inline-size: 1px; block-size: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
  [hidden] { display: none !important; }

  .login-page { padding-block-end: 0; }
  .login-panel { inline-size: min(100%, 390px); border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: clamp(24px, 7vw, 36px); }
  .login-mark { inline-size: 48px; block-size: 48px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 10px; background: var(--input); color: var(--action); margin-block-end: 24px; }
  .login-mark svg { inline-size: 28px; block-size: 28px; }
  .field { display: grid; gap: 7px; border: 0; padding: 0; }
  .field label, .field legend { color: var(--muted); font-size: .9rem; font-weight: 650; }
  .alert { border: 1px solid var(--line); border-radius: 10px; background: var(--input); padding: 12px 14px; color: var(--ink); }
  .alert--error { border-color: color-mix(in srgb, var(--error) 50%, var(--line)); color: #ffd0d0; }
  .alert--warning { border-color: color-mix(in srgb, var(--warning) 45%, var(--line)); }
  .alert-stack { display: grid; gap: 8px; margin-block: 20px; }

  .home-intro { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-block-end: 28px; }
  .home-intro p { margin-block-start: 6px; }
  .scan-cta { min-inline-size: 180px; }
  .search { position: relative; display: flex; align-items: center; margin-block-end: 32px; }
  .search > svg { position: absolute; inset-inline-start: 14px; color: var(--muted); inline-size: 20px; block-size: 20px; pointer-events: none; }
  .search input { padding-inline-start: 44px; padding-inline-end: 62px; }
  .search-clear { position: absolute; inset-inline-end: 13px; color: var(--action); font-size: .86rem; font-weight: 700; }
  .section-heading { display: flex; align-items: center; gap: 9px; padding-block-end: 10px; border-block-end: 1px solid var(--line); }
  .count { min-inline-size: 24px; block-size: 24px; display: inline-grid; place-items: center; border-radius: 999px; background: var(--input); color: var(--muted); font-size: .78rem; font-variant-numeric: tabular-nums; }
  .receipt-list { display: grid; }
  .receipt-row { min-block-size: 76px; display: grid; grid-template-columns: minmax(0, 1fr) auto 24px; align-items: center; gap: 14px; border-block-end: 1px solid var(--line); text-decoration: none; padding-block: 13px; }
  .receipt-row:hover { background: color-mix(in srgb, var(--surface) 54%, transparent); }
  .receipt-row__main, .receipt-row__amount { min-inline-size: 0; display: grid; gap: 3px; }
  .receipt-row__main strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .receipt-row__main span, .receipt-row__amount span { color: var(--muted); font-size: .84rem; }
  .receipt-row__amount { text-align: end; }
  .receipt-row__amount strong { font-variant-numeric: tabular-nums; }
  .chevron { color: var(--faint); inline-size: 20px; block-size: 20px; }
  .empty-state { display: grid; justify-items: start; gap: 10px; max-inline-size: 430px; padding-block: 46px; }
  .empty-state > svg { inline-size: 36px; block-size: 36px; color: var(--faint); margin-block-end: 4px; }
  .empty-state p { color: var(--muted); margin-block-end: 8px; }

  .page-heading { display: flex; align-items: center; gap: 13px; margin-block-end: 24px; }
  .page-heading p { margin-block-start: 4px; }
  .back-link { flex: 0 0 auto; inline-size: 48px; block-size: 48px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); color: var(--ink); text-decoration: none; cursor: pointer; }
  .back-link:hover { background: var(--input); }
  .narrow-page { max-inline-size: 620px; margin-inline: auto; }

  .camera-shell { position: relative; overflow: hidden; inline-size: min(100%, 720px); aspect-ratio: 3 / 4; max-block-size: calc(100dvb - 300px); min-block-size: 380px; margin-inline: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #0b0d0e; }
  .camera-shell video, .camera-shell > img { inline-size: 100%; block-size: 100%; object-fit: cover; }
  .receipt-guide { position: absolute; inset: 8% 12%; border: 2px solid rgba(242, 244, 243, .78); border-radius: 8px; box-shadow: 0 0 0 999px rgba(8, 10, 11, .32); pointer-events: none; }
  .receipt-guide::before, .receipt-guide::after { content: ""; position: absolute; inline-size: 42px; block-size: 42px; border-color: var(--action); border-style: solid; }
  .receipt-guide::before { inset-block-start: -3px; inset-inline-start: -3px; border-width: 3px 0 0 3px; border-start-start-radius: 8px; }
  .receipt-guide::after { inset-block-end: -3px; inset-inline-end: -3px; border-width: 0 3px 3px 0; border-end-end-radius: 8px; }
  .receipt-guide span { position: absolute; inset-block-start: 10px; inset-inline-start: 50%; transform: translateX(-50%); padding: 3px 8px; border-radius: 4px; background: rgba(15, 17, 18, .72); color: #f2f4f3; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
  .camera-placeholder { position: absolute; inset: 0; display: grid; place-content: center; justify-items: center; gap: 12px; color: var(--muted); text-align: center; padding: 28px; }
  .camera-placeholder svg { inline-size: 42px; block-size: 42px; }
  .camera-tool { position: absolute; inset-block-start: 12px; inset-inline-end: 12px; z-index: 2; min-block-size: 46px; display: inline-flex; align-items: center; gap: 7px; border: 1px solid rgba(255,255,255,.25); border-radius: 8px; background: rgba(14,17,18,.78); color: #f2f4f3; padding-inline: 12px; cursor: pointer; }
  .camera-tool[aria-pressed="true"] { background: var(--action); color: var(--action-ink); }
  .camera-tool svg { inline-size: 18px; block-size: 18px; }
  .capture-actions { display: grid; grid-template-columns: minmax(220px, 1fr) minmax(220px, 1fr); gap: 10px; max-inline-size: 720px; margin: 14px auto 0; }
  .button--capture { min-block-size: 56px; }
  .capture-ring { inline-size: 22px; block-size: 22px; border: 3px solid currentColor; border-radius: 50%; box-shadow: inset 0 0 0 3px var(--action); background: currentColor; }
  .file-label { user-select: none; }

  .processing-step { min-block-size: calc(100dvb - 190px); display: grid; place-content: center; justify-items: center; text-align: center; }
  .processing-mark { inline-size: 72px; block-size: 72px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); color: var(--action); margin-block-end: 22px; animation: scan-pulse 1.1s ease-in-out infinite alternate; }
  .processing-mark svg { inline-size: 38px; block-size: 38px; }
  .processing-step p { color: var(--muted); margin-block-start: 8px; }
  .progress-line { inline-size: min(280px, 72vw); block-size: 3px; overflow: hidden; background: var(--line); margin-block-start: 24px; }
  .progress-line span { display: block; inline-size: 38%; block-size: 100%; background: var(--action); animation: scan-progress 1.05s ease-in-out infinite alternate; }
  @keyframes scan-pulse { to { transform: scale(1.035); opacity: .82; } }
  @keyframes scan-progress { from { transform: translateX(-20%); } to { transform: translateX(185%); } }

  .review-layout { display: grid; grid-template-columns: minmax(280px, .85fr) minmax(360px, 1.15fr); gap: clamp(24px, 5vw, 54px); align-items: start; }
  .review-image-wrap { position: sticky; inset-block-start: 20px; }
  .review-image { inline-size: 100%; max-block-size: 72dvb; object-fit: contain; border: 1px solid var(--line); border-radius: var(--radius); background: #0b0d0e; }
  .receipt-form { max-inline-size: 560px; }
  .amount-field label { display: flex; justify-content: space-between; gap: 10px; }
  .money-input { position: relative; }
  .money-input > span { position: absolute; inset-inline-start: 14px; inset-block-start: 50%; transform: translateY(-50%); color: var(--muted); font-size: 1.25rem; font-weight: 700; }
  .money-input input { min-block-size: 64px; padding-inline-start: 34px; font-size: 1.65rem; font-weight: 760; font-variant-numeric: tabular-nums; }
  .confidence { font-size: .76rem; font-weight: 650; }
  .confidence[data-level="high"] { color: var(--success); }
  .confidence[data-level="medium"] { color: var(--warning); }
  .confidence[data-level="low"] { color: var(--error); }
  .segmented { display: grid; grid-template-columns: 1fr 1fr; gap: 5px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); padding: 4px; }
  .segmented label { cursor: pointer; }
  .segmented input { position: absolute; opacity: 0; pointer-events: none; }
  .segmented span { min-block-size: 44px; display: grid; place-items: center; border-radius: 7px; color: var(--muted); }
  .segmented input:checked + span { background: var(--action); color: var(--action-ink); font-weight: 750; }
  .segmented input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 2px; }
  .inline-actions { display: flex; flex-wrap: wrap; gap: 8px; }
  .inline-actions button { min-block-size: 42px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); color: var(--ink); padding-inline: 12px; cursor: pointer; }
  .details-disclosure { border-block: 1px solid var(--line); }
  .disclosure-button { inline-size: 100%; min-block-size: 52px; display: flex; align-items: center; justify-content: space-between; border: 0; background: none; font-weight: 680; cursor: pointer; padding: 0 2px; }
  .disclosure-button svg { transition: transform 160ms ease-out; }
  .disclosure-button[aria-expanded="true"] svg { transform: rotate(180deg); }
  .disclosure-content { padding-block: 10px 20px; }
  .alternatives { border: 1px solid color-mix(in srgb, var(--warning) 50%, var(--line)); border-radius: 10px; background: var(--surface); padding: 14px; margin-block-end: 20px; }
  .alternative-choices { display: flex; flex-wrap: wrap; gap: 8px; margin-block-start: 12px; }
  .alternative-choices label { cursor: pointer; }
  .alternative-choices input { position: absolute; opacity: 0; }
  .alternative-choices span { min-block-size: 44px; display: inline-flex; align-items: center; border: 1px solid var(--line); border-radius: 8px; padding-inline: 16px; font-weight: 750; font-variant-numeric: tabular-nums; }
  .alternative-choices input:checked + span { border-color: var(--action); background: var(--action); color: var(--action-ink); }
  .form-error { color: #ffd0d0; border: 1px solid color-mix(in srgb, var(--error) 50%, var(--line)); border-radius: 10px; padding: 12px 14px; }
  .save-button { min-block-size: 56px; }

  .detail-layout { display: grid; grid-template-columns: minmax(260px, .9fr) minmax(360px, 1.1fr); gap: clamp(24px, 5vw, 54px); align-items: start; }
  .detail-image-link { display: block; }
  .detail-image { inline-size: 100%; max-block-size: 75dvb; border: 1px solid var(--line); border-radius: var(--radius); object-fit: contain; background: #0b0d0e; }
  .detail-total { display: flex; align-items: end; justify-content: space-between; gap: 16px; border-block-end: 1px solid var(--line); padding-block-end: 20px; }
  .detail-total span { color: var(--muted); }
  .detail-total strong { font-size: clamp(2rem, 1.5rem + 2vw, 3rem); line-height: 1; font-variant-numeric: tabular-nums; }
  .data-list > div, .system-list > div { display: grid; grid-template-columns: minmax(100px, .7fr) minmax(0, 1.3fr); gap: 16px; border-block-end: 1px solid var(--line); padding-block: 14px; }
  .data-list dt, .system-list dt { color: var(--muted); }
  .data-list dd, .system-list dd { text-align: end; overflow-wrap: anywhere; }
  details { border-block-end: 1px solid var(--line); padding-block: 14px; }
  summary { cursor: pointer; color: var(--muted); }
  pre { overflow: auto; max-block-size: 320px; white-space: pre-wrap; color: var(--muted); font: .82rem/1.5 "Cascadia Mono", Consolas, monospace; margin-block: 14px 0; }

  .system-list { border-block-start: 1px solid var(--line); }
  .system-list dd span { display: block; color: var(--muted); font-size: .82rem; margin-block-start: 3px; }
  .timing-block { margin-block-start: 34px; }
  .timing-block h2 { margin-block-end: 10px; }
  .timing-block dl { border-block-start: 1px solid var(--line); }
  .timing-block dl > div { display: flex; justify-content: space-between; gap: 18px; border-block-end: 1px solid var(--line); padding-block: 10px; }
  .timing-block dt { color: var(--muted); }
  .timing-block dd { font: .88rem "Cascadia Mono", Consolas, monospace; font-variant-numeric: tabular-nums; }

  .toast { position: fixed; z-index: 50; inset-inline: 16px; inset-block-end: calc(86px + env(safe-area-inset-bottom)); max-inline-size: 520px; margin-inline: auto; border: 1px solid var(--line); border-radius: 10px; background: var(--input); color: var(--ink); padding: 13px 15px; box-shadow: 0 8px 16px rgba(4, 6, 7, .24); }
  .toast[data-tone="error"] { border-color: var(--error); }
}

@layer responsive {
  @media (min-width: 800px) {
    body { display: flex; flex-direction: column; padding-block-end: 0; }
    .app-shell { order: 2; padding-block: 42px 64px; }
    .bottom-nav { position: static; order: 1; inline-size: min(100% - 32px, var(--max)); min-block-size: 58px; grid-template-columns: repeat(4, auto); justify-content: start; gap: 4px; margin-inline: auto; border-block: 0 1px solid var(--line); background: transparent; padding: 0; backdrop-filter: none; }
    .bottom-nav a { min-inline-size: 106px; min-block-size: 57px; grid-template-columns: 22px auto; align-content: center; gap: 8px; font-size: .86rem; }
    .bottom-nav a.is-active::after { inset-block-start: auto; inset-block-end: -1px; inline-size: 44px; }
    .toast { inset-block-end: 24px; }
  }

  @media (max-width: 799px) {
    .topbar { position: sticky; inset-block-start: 0; z-index: 15; block-size: 56px; background: color-mix(in srgb, var(--canvas) 94%, transparent); padding-inline: 16px; backdrop-filter: blur(12px); }
    .brand span { font-size: .94rem; }
    .app-shell { inline-size: min(100% - 32px, var(--max)); padding-block: 20px 36px; }
    .home-intro { align-items: stretch; flex-direction: column; gap: 16px; margin-block-end: 20px; }
    .scan-cta { inline-size: 100%; min-block-size: 58px; }
    .search { margin-block-end: 24px; }
    .capture-actions { grid-template-columns: 1fr; }
    .review-layout, .detail-layout { grid-template-columns: 1fr; }
    .review-image-wrap { position: static; }
    .review-image { max-block-size: 38dvb; }
    .detail-image { max-block-size: 55dvb; }
    .login-page .app-shell { inline-size: min(100% - 32px, 390px); align-items: start; padding-block-start: max(48px, 10dvb); }
    .login-panel { border: 0; background: transparent; padding: 0; }
    .login-mark { margin-block-end: 20px; }
    .scan-page { padding-block-end: 0; }
    .scan-page .bottom-nav { display: none; }
    .scan-page .app-shell { padding-block-end: calc(20px + env(safe-area-inset-bottom)); }
    .scan-page .capture-actions { position: sticky; z-index: 8; inset-block-end: 0; background: linear-gradient(to bottom, transparent, var(--canvas) 12px); padding-block: 22px calc(4px + env(safe-area-inset-bottom)); margin-block-start: -4px; }
    .scan-page .save-button { position: sticky; z-index: 8; inset-block-end: calc(8px + env(safe-area-inset-bottom)); box-shadow: 0 0 0 8px var(--canvas); }
    .narrow-page .receipt-form .save-button { position: sticky; z-index: 8; inset-block-end: calc(78px + env(safe-area-inset-bottom)); box-shadow: 0 0 0 8px var(--canvas); }
  }

  @media (max-width: 460px) {
    .page-heading { align-items: flex-start; gap: 10px; margin-block-end: 18px; }
    .page-heading h1 { padding-block-start: 3px; }
    .camera-shell { inline-size: calc(100% + 32px); min-block-size: 300px; margin-inline-start: -16px; border-inline: 0; border-radius: 0; max-block-size: calc(100dvb - 344px); }
    .receipt-guide { inset-inline: 10%; }
    .receipt-row { min-block-size: 72px; grid-template-columns: minmax(0, 1fr) auto 18px; gap: 9px; }
    .receipt-row__main span { max-inline-size: 46vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .data-list > div, .system-list > div { grid-template-columns: 1fr; gap: 3px; }
    .data-list dd, .system-list dd { text-align: start; }
  }

  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  }
}