:root {
  color-scheme: dark;
  --bg: #0a0f1f;
  --panel: rgba(20, 28, 51, 0.92);
  --panel-strong: #17213d;
  --line: #33415f;
  --line-soft: rgba(116, 139, 181, 0.22);
  --text: #f6f8ff;
  --muted: #aab5cd;
  --accent: #7c9cff;
  --accent-strong: #9bb1ff;
  --accent-ink: #081029;
  --danger: #ff9191;
  --success: #87e9bb;
  --focus: #b8c7ff;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
  font-family:
    Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP",
    sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  min-height: 100%;
  background: var(--bg);
  scroll-padding-top: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 0%, rgba(91, 121, 255, 0.16), transparent 36rem),
    radial-gradient(circle at 90% 18%, rgba(73, 212, 178, 0.09), transparent 30rem),
    var(--bg);
  -webkit-tap-highlight-color: transparent;
}

button,
input {
  font: inherit;
}

button {
  touch-action: manipulation;
}

.app-shell {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
  padding:
    calc(48px + env(safe-area-inset-top))
    env(safe-area-inset-right)
    calc(28px + env(safe-area-inset-bottom))
    env(safe-area-inset-left);
}

.hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 24px;
}

.hero-copy {
  min-width: 0;
}

.hero-tools {
  display: grid;
  flex: 0 0 auto;
  gap: 10px;
  min-width: 260px;
}

.eyebrow,
.step-label {
  margin: 0 0 8px;
  color: var(--accent-strong);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.15em;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 12px;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.06;
  letter-spacing: -0.04em;
}

h2 {
  margin-bottom: 0;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.lead {
  max-width: 44rem;
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.7;
}

.utc-clock {
  min-width: 0;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(10, 15, 31, 0.8);
  box-shadow: var(--shadow);
}

.utc-clock span,
.utc-clock small {
  display: block;
  color: var(--muted);
  font-size: 0.76rem;
}

.utc-clock strong {
  display: block;
  margin: 5px 0 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.install-guide {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin: 0 0 18px;
  padding: 14px 16px;
  border: 1px solid rgba(155, 177, 255, 0.4);
  border-radius: 14px;
  background: rgba(35, 48, 82, 0.8);
}

.install-guide strong {
  display: block;
  margin-bottom: 4px;
  font-size: 0.88rem;
}

.install-guide p {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.55;
}

.panel {
  margin-top: 20px;
  padding: clamp(20px, 4vw, 34px);
  border: 1px solid var(--line-soft);
  border-radius: 20px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 26px;
}

.field label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}

.mobile-field-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

input {
  width: 100%;
  min-height: 48px;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 11px;
  outline: none;
  color: var(--text);
  background: #0e162b;
  font-size: 1rem;
  transition:
    border-color 150ms ease,
    box-shadow 150ms ease,
    background 150ms ease;
}

input:hover {
  border-color: #52658b;
}

input:focus-visible {
  border-color: var(--focus);
  box-shadow: 0 0 0 3px rgba(155, 177, 255, 0.18);
}

input[aria-invalid="true"] {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(255, 145, 145, 0.12);
}

input::placeholder {
  color: #687692;
}

.destination-field {
  max-width: 560px;
  margin-bottom: 26px;
}

.field-error,
.form-error {
  min-height: 1.15em;
  margin: 6px 0 0;
  color: var(--danger);
  font-size: 0.76rem;
  line-height: 1.35;
}

.form-error {
  min-height: 0;
  margin-top: 16px;
  font-size: 0.84rem;
}

.leader-header,
.leader-row {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) 150px 110px 48px;
  gap: 12px;
  align-items: start;
}

.leader-header {
  padding: 0 0 8px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
}

.leader-list {
  display: grid;
  gap: 9px;
}

.leader-row {
  position: relative;
  padding: 12px;
  border: 1px solid var(--line-soft);
  border-radius: 13px;
  background: rgba(8, 14, 30, 0.52);
}

.leader-row-number {
  display: none;
}

.duration-field input {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.button,
.icon-button,
.copy-row {
  min-height: 44px;
  border: 0;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 800;
  transition:
    transform 120ms ease,
    filter 120ms ease,
    background 120ms ease,
    border-color 120ms ease;
}

.button:focus-visible,
.icon-button:focus-visible,
.copy-row:focus-visible {
  outline: 3px solid rgba(184, 199, 255, 0.6);
  outline-offset: 2px;
}

.button:hover,
.icon-button:hover,
.copy-row:hover {
  filter: brightness(1.09);
}

.button:active,
.icon-button:active,
.copy-row:active {
  transform: translateY(1px);
}

.button:disabled,
.icon-button:disabled,
.copy-row:disabled {
  cursor: not-allowed;
  opacity: 0.4;
}

.button {
  padding: 11px 18px;
}

.button.primary {
  color: var(--accent-ink);
  background: var(--accent-strong);
}

.button.secondary {
  border: 1px solid var(--line);
  color: var(--text);
  background: #202d4d;
}

.button.ghost {
  border: 1px solid transparent;
  color: var(--muted);
  background: transparent;
}

.button.compact {
  min-height: 40px;
  padding: 8px 13px;
  font-size: 0.82rem;
}

.install-button {
  width: 100%;
}

.icon-button {
  width: 44px;
  height: 48px;
  padding: 0;
  color: var(--muted);
  background: transparent;
  font-size: 1.25rem;
}

.dismiss-install {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  min-height: 40px;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.summary-card {
  min-height: 124px;
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  background: #101a31;
}

.summary-card.featured {
  border-color: rgba(155, 177, 255, 0.58);
  background: linear-gradient(145deg, rgba(91, 121, 255, 0.24), rgba(16, 26, 49, 0.9));
}

.summary-card span,
.summary-card small {
  display: block;
  color: var(--muted);
  font-size: 0.76rem;
}

.summary-card strong {
  display: block;
  margin-top: 10px;
  overflow-wrap: anywhere;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: clamp(0.9rem, 2vw, 1.08rem);
  font-variant-numeric: tabular-nums;
}

.summary-card small {
  margin-top: 8px;
}

.summary-card small.expired {
  color: var(--danger);
  font-weight: 800;
}

.result-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  -webkit-overflow-scrolling: touch;
}

.result-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
}

.result-table th,
.result-table td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--line-soft);
  text-align: left;
}

.result-table th {
  color: var(--muted);
  background: rgba(8, 14, 30, 0.66);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
}

.result-table td {
  font-size: 0.88rem;
}

.result-table tbody tr:last-child td {
  border-bottom: 0;
}

.result-table td:nth-child(2),
.result-table td:nth-child(3),
.result-table td:nth-child(4) {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.copy-row {
  min-height: 38px;
  padding: 7px 12px;
  color: var(--text);
  background: #263555;
  white-space: nowrap;
}

.result-note {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.65;
}

footer {
  padding: 24px 6px 0;
  color: var(--muted);
  font-size: 0.76rem;
  text-align: center;
}

footer p {
  margin-bottom: 0;
}

.toast {
  position: fixed;
  right: max(16px, env(safe-area-inset-right));
  bottom: max(16px, calc(env(safe-area-inset-bottom) + 8px));
  z-index: 20;
  max-width: min(360px, calc(100vw - 32px));
  padding: 12px 15px;
  border: 1px solid rgba(135, 233, 187, 0.4);
  border-radius: 10px;
  color: #dcfff0;
  background: rgba(15, 50, 42, 0.96);
  box-shadow: var(--shadow);
  font-size: 0.84rem;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition:
    opacity 160ms ease,
    transform 160ms ease;
}

.toast.visible {
  opacity: 1;
  transform: translateY(0);
}

.toast.error {
  border-color: rgba(255, 145, 145, 0.5);
  background: rgba(89, 28, 34, 0.97);
}

.copy-buffer {
  position: fixed;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.noscript {
  margin: 0;
  padding: 16px;
  color: white;
  background: #7b2424;
  text-align: center;
}

[hidden] {
  display: none !important;
}

@media (max-width: 760px) {
  html {
    scroll-padding-top: 10px;
  }

  .app-shell {
    width: min(100% - 20px, 1080px);
    padding-top: calc(22px + env(safe-area-inset-top));
  }

  .panel {
    padding: 20px 16px;
    border-radius: 17px;
    backdrop-filter: none;
  }

  .hero {
    display: grid;
    gap: 18px;
    align-items: stretch;
  }

  .hero-tools {
    min-width: 0;
  }

  h1 {
    font-size: clamp(2rem, 11vw, 2.8rem);
  }

  .lead {
    font-size: 0.92rem;
    line-height: 1.6;
  }

  .utc-clock {
    min-width: 0;
  }

  .section-heading {
    align-items: flex-start;
  }

  .leader-header {
    display: none;
  }

  .leader-row {
    grid-template-columns: minmax(0, 1fr) minmax(90px, 0.42fr) minmax(82px, 0.34fr) 44px;
    padding: 14px;
  }

  .leader-row-number {
    display: block;
    grid-column: 1 / 4;
    color: var(--accent-strong);
    font-size: 0.78rem;
    font-weight: 800;
  }

  .remove-leader {
    grid-column: 4;
    grid-row: 1;
    height: 40px;
    min-height: 40px;
    margin-top: -8px;
  }

  .mobile-field-label {
    position: static;
    width: auto;
    height: auto;
    margin: 0 0 6px;
    overflow: visible;
    clip: auto;
    white-space: normal;
  }

  .summary-grid {
    grid-template-columns: 1fr;
  }

  .summary-card {
    min-height: 0;
  }

  .result-table-wrap {
    overflow: visible;
    border: 0;
    border-radius: 0;
  }

  .result-table {
    display: block;
    min-width: 0;
  }

  .result-table thead {
    display: none;
  }

  .result-table tbody {
    display: grid;
    gap: 10px;
  }

  .result-table tr {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px 16px;
    padding: 14px;
    border: 1px solid var(--line-soft);
    border-radius: 13px;
    background: rgba(8, 14, 30, 0.52);
  }

  .result-table td {
    min-width: 0;
    padding: 0;
    border: 0;
  }

  .result-table td::before {
    display: block;
    margin-bottom: 4px;
    color: var(--muted);
    content: attr(data-label);
    font-family: inherit;
    font-size: 0.68rem;
    font-weight: 700;
  }

  .result-table td:nth-child(1) {
    grid-column: 1;
    grid-row: 1;
  }

  .result-table td:nth-child(2) {
    grid-column: 2;
    grid-row: 1;
    text-align: right;
  }

  .result-table td:nth-child(3) {
    grid-column: 1 / -1;
    grid-row: 2;
    overflow-wrap: anywhere;
    white-space: normal;
  }

  .result-table td:nth-child(4) {
    grid-column: 1;
    grid-row: 3;
  }

  .result-table td:nth-child(5) {
    grid-column: 2;
    grid-row: 3;
    align-self: end;
  }

  .result-table td:nth-child(5)::before {
    display: none;
  }
}

@media (max-width: 520px) {
  .section-heading {
    display: grid;
  }

  .result-heading-row {
    grid-template-columns: 1fr auto;
  }

  .leader-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) 44px;
    gap: 10px;
  }

  .leader-row-number {
    grid-column: 1 / 3;
  }

  .leader-name-field {
    grid-column: 1 / -1;
  }

  .leader-row .duration-field:nth-child(3) {
    grid-column: 1;
  }

  .leader-row .duration-field:nth-child(4) {
    grid-column: 2;
  }

  .remove-leader {
    grid-column: 3;
  }

  .form-actions {
    position: sticky;
    z-index: 5;
    bottom: max(8px, env(safe-area-inset-bottom));
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    padding: 10px;
    border: 1px solid var(--line-soft);
    border-radius: 14px;
    background: rgba(10, 15, 31, 0.96);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
  }

  .calculate-button {
    min-height: 50px;
  }

  .form-actions .button.ghost {
    min-width: 52px;
    padding-inline: 10px;
    font-size: 0.78rem;
  }

  .toast {
    right: 16px;
    left: 16px;
    max-width: none;
    text-align: center;
  }
}

@media (display-mode: standalone) {
  .install-guide,
  .install-button {
    display: none !important;
  }

  .app-shell {
    padding-top: calc(18px + env(safe-area-inset-top));
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}