*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #16161e;
  --surface: #1e1e28;
  --surface2: #262632;
  --border: #34344a;
  --text: #eeeef5;
  --text-dim: #8888a8;
  --text-muted: #55557a;
  --accent: #c8ff00;
  --accent-dim: #8aad00;
  --accent-glow: rgba(200, 255, 0, 0.15);
  --red: #ff4060;
  --font-display: "DM Serif Display", serif;
  --font-ui: "Syne", sans-serif;
  --font-mono: "JetBrains Mono", monospace;
}

:root {
  --header-bg: rgba(22, 22, 30, 0.88);
  --shadow-card: rgba(0, 0, 0, 0.35);
}

html.light {
  --bg: #f4f4f0;
  --surface: #ffffff;
  --surface2: #ebebeb;
  --border: #d8d8d0;
  --text: #111118;
  --text-dim: #5a5a72;
  --text-muted: #9898b0;
  --accent: #5c8500;
  --accent-dim: #3d5900;
  --accent-glow: rgba(92, 133, 0, 0.15);
  --red: #d42040;
  --header-bg: rgba(244, 244, 240, 0.88);
  --shadow-card: rgba(0, 0, 0, 0.1);
}

/* theme toggle */
.theme-toggle {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s, color 0.2s;
  flex-shrink: 0;
}
.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.icon-sun {
  display: none;
}
.icon-moon {
  display: block;
}
html.light .icon-sun {
  display: block;
}
html.light .icon-moon {
  display: none;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  transition: background 0.25s, color 0.25s;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.25s, color 0.25s;
}

/* Noise texture overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.4;
}

/* ── HEADER ── */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2.5rem;
  background: var(--header-bg, rgba(10, 10, 15, 0.85));
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.15em;
  color: var(--accent);
  text-decoration: none;
  cursor: pointer;
}
.logo span {
  color: var(--text-dim);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  display: block;
  margin-top: -4px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* ── BUTTONS ── */
.btn {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.6rem 1.4rem;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  border-radius: 2px;
}
.btn-primary {
  background: var(--accent);
  color: #0a0a0f;
}
.btn-primary:hover {
  background: #d8ff20;
  box-shadow: 0 0 20px var(--accent-glow);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-danger {
  background: transparent;
  color: var(--red);
  border: 1px solid transparent;
  font-size: 0.75rem;
  padding: 0.4rem 0.8rem;
}
.btn-danger:hover {
  border-color: var(--red);
  background: rgba(255, 64, 96, 0.08);
}
.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.72rem;
}

/* ── MAIN VIEWS ── */
.view {
  display: none;
  min-height: 100vh;
  padding-top: 5rem;
}
.view.active {
  display: block;
}

/* ── LOADING ── */
#view-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
.spinner {
  width: 40px;
  height: 40px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ── HERO / HOME ── */
.home-hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 2.5rem 2rem;
}

.home-tagline {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5rem);
  line-height: 1.05;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--text) 0%, var(--text-dim) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.home-tagline em {
  color: var(--accent);
  -webkit-text-fill-color: var(--accent);
  font-style: normal;
}

.home-sub {
  color: var(--text-dim);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  margin-bottom: 3rem;
  font-family: var(--font-mono);
}

/* ── COUNTDOWN GRID ── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto 1.5rem;
  padding: 0 2.5rem;
}
.section-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.section-title span {
  color: var(--accent);
}

.countdown-grid {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2.5rem 4rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5px;
}

.countdown-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 2rem;
  cursor: pointer;
  transition: all 0.25s;
  position: relative;
  overflow: hidden;
}
.countdown-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}
.countdown-card:hover {
  background: var(--surface2);
  border-color: var(--border);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--shadow-card, rgba(0, 0, 0, 0.4));
}
.countdown-card:hover::before {
  transform: scaleX(1);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  line-height: 1.2;
}
.card-date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
}

.card-timer {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1;
}
.card-timer.urgent {
  color: var(--red);
  animation: pulse 1s ease infinite;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

.card-unit {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-top: 0.25rem;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}
.card-past {
  color: var(--text-muted);
  font-size: 0.7rem;
  font-family: var(--font-mono);
}

.empty-state {
  grid-column: 1 / -1;
  padding: 5rem 2rem;
  text-align: center;
  color: var(--text-muted);
}
.empty-state p {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  margin-bottom: 1.5rem;
}

/* ── SIGN IN view ── */
.auth-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem;
}
.auth-box {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 3rem;
  width: 100%;
  max-width: 440px;
  text-align: center;
}
.auth-logo {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.auth-subtitle {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  margin-bottom: 2.5rem;
}
#clerk-sign-in {
  min-height: 300px;
}

/* ── CREATE FORM ── */
.create-container {
  max-width: 640px;
  margin: 0 auto;
  padding: 3rem 2.5rem;
}
.page-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}
.page-subtitle {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  margin-bottom: 3rem;
}

.form-group {
  margin-bottom: 2rem;
}
.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}
.form-input {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 1rem;
  padding: 0.9rem 1.2rem;
  outline: none;
  transition: border-color 0.2s;
  border-radius: 0;
  -webkit-appearance: none;
}
.form-input:focus {
  border-color: var(--accent);
}
.form-input::placeholder {
  color: var(--text-muted);
}
input[type="datetime-local"]::-webkit-calendar-picker-indicator {
  filter: invert(1) brightness(0.4);
}
html.light input[type="datetime-local"]::-webkit-calendar-picker-indicator {
  filter: invert(0) brightness(0.5);
}

.form-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2.5rem;
}
.form-error {
  color: var(--red);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  margin-top: 1rem;
  display: none;
}

/* ── DETAIL VIEW ── */
.detail-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 2.5rem;
}
.detail-back {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  text-decoration: none;
  cursor: pointer;
  margin-bottom: 3rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: none;
  transition: color 0.2s;
}
.detail-back:hover {
  color: var(--accent);
}

.detail-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.1;
  margin-bottom: 0.5rem;
}
.detail-target-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  margin-bottom: 3rem;
}

/* Big timer */
.big-timer {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 3rem 2.5rem;
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}
.big-timer::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: scanline 3s ease infinite;
}
@keyframes scanline {
  0%,
  100% {
    opacity: 0.3;
  }
  50% {
    opacity: 1;
  }
}

.big-timer-value {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 7vw, 5rem);
  font-weight: 300;
  color: var(--accent);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 0.5rem;
}
.big-timer-value.urgent {
  color: var(--red);
  animation: pulse 1s ease infinite;
}
.big-timer-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* Units grid */
.units-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1.5px;
  margin-bottom: 2rem;
}
.unit-cell {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1.5rem 1.25rem;
  transition: background 0.2s;
}
.unit-cell:hover {
  background: var(--surface2);
}
.unit-value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 400;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 0.4rem;
}
.unit-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* Share box */
.share-box {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1.5rem;
  display: flex;
  gap: 0.75rem;
  align-items: stretch;
  margin-bottom: 2rem;
}
.share-url {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 0.75rem 1rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.share-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.copy-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  background: var(--accent);
  color: #0a0a0f;
  border: none;
  padding: 0 1.25rem;
  cursor: pointer;
  text-transform: uppercase;
  font-weight: 700;
  transition: background 0.2s;
  white-space: nowrap;
}
.copy-btn:hover {
  background: #d8ff20;
}
.copy-btn.copied {
  background: var(--surface2);
  color: var(--accent);
  border: 1px solid var(--accent);
}

.detail-actions {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: flex-end;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

/* ── SHARED VIEW (public, no auth) ── */
.shared-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 0.35rem 0.75rem;
  display: inline-block;
  margin-bottom: 2rem;
  text-transform: uppercase;
}

/* ── FLOATING SHARE BUTTON (mobile) ── */
.float-action-bar {
  display: none;
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  right: 1.5rem;
  z-index: 200;
  gap: 0.75rem;
}
.float-share-btn {
  flex: 1;
  background: var(--accent);
  color: #0a0a0f;
  border: none;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.85rem 1rem;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(200, 255, 0, 0.3);
  transition: background 0.2s, transform 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  white-space: nowrap;
}
.float-share-btn:active {
  transform: scale(0.96);
}
.float-share-btn.copied {
  background: var(--surface2);
  color: var(--accent);
  border: 1px solid var(--accent);
}
.float-delete-btn {
  background: transparent;
  color: var(--red);
  border: 1px solid var(--red);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.85rem 1rem;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
}
.float-delete-btn:active {
  background: rgba(255, 64, 96, 0.15);
}
@media (max-width: 640px) {
  .float-action-bar {
    display: flex;
  }
  .big-timer {
    padding: 2rem 1.5rem;
  }
  .units-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .detail-container {
    padding: 2rem 1.25rem 6rem;
  }
  /* 元の detail-actions は非表示にしてフローティングバーに統合 */
  .detail-actions {
    display: none;
  }
}

/* ── TOAST ── */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--surface2);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  padding: 0.75rem 1.5rem;
  z-index: 9999;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s;
}
.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* ── TABS ── */
.tab-bar {
  display: flex;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto 1.5rem;
  padding: 0 2.5rem;
  gap: 0;
  border-bottom: 1px solid var(--border);
}
.tab-btn {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 0.75rem 1.25rem 0.75rem 0;
  margin-bottom: -1px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}
.tab-btn:hover {
  color: var(--text-dim);
}
.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.tab-btn span {
  color: var(--accent);
  margin-left: 0.3em;
}
.tab-new {
  margin-left: auto;
  margin-bottom: 0.5rem;
}

/* public card — slightly different badge */
.card-public-badge {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 0.15rem 0.5rem;
  display: inline-block;
  margin-bottom: 0.6rem;
  text-transform: uppercase;
}

/* ── PUBLIC TOGGLE ── */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1rem 1.2rem;
}
.toggle-desc {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
  letter-spacing: 0.05em;
}
.toggle-btn {
  width: 44px;
  height: 24px;
  border-radius: 12px;
  background: var(--border);
  border: none;
  cursor: pointer;
  position: relative;
  transition: background 0.25s;
  flex-shrink: 0;
}
.toggle-btn[aria-pressed="true"] {
  background: var(--accent);
}
.toggle-knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg);
  transition: transform 0.25s;
  display: block;
}
.toggle-btn[aria-pressed="true"] .toggle-knob {
  transform: translateX(20px);
}
.card-creator {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.card-creator::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.6;
}
.card-private-badge {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 0.12rem 0.45rem;
  display: inline-block;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}
.card-public-badge {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  border: 1px solid var(--accent);
  opacity: 0.7;
  padding: 0.12rem 0.45rem;
  display: inline-block;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  header {
    padding: 1rem 1.25rem;
  }
  .home-hero,
  .section-header,
  .countdown-grid,
  .create-container,
  .detail-container {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }
  .countdown-grid {
    grid-template-columns: 1fr;
  }
  .units-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .share-box {
    flex-direction: column;
  }
  .copy-btn {
    padding: 0.75rem;
  }
  .big-timer-value {
    font-size: 2.5rem;
  }
}

/* Animations */
.fade-in {
  animation: fadeIn 0.4s ease forwards;
}
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.stagger > * {
  opacity: 0;
  animation: fadeIn 0.4s ease forwards;
}
.stagger > *:nth-child(1) {
  animation-delay: 0.05s;
}
.stagger > *:nth-child(2) {
  animation-delay: 0.1s;
}
.stagger > *:nth-child(3) {
  animation-delay: 0.15s;
}
.stagger > *:nth-child(4) {
  animation-delay: 0.2s;
}
.stagger > *:nth-child(5) {
  animation-delay: 0.25s;
}
.stagger > *:nth-child(6) {
  animation-delay: 0.3s;
}
.stagger > *:nth-child(7) {
  animation-delay: 0.35s;
}
.stagger > *:nth-child(8) {
  animation-delay: 0.4s;
}
.stagger > *:nth-child(n + 9) {
  animation-delay: 0.45s;
}