.linecalc {
  --linecalc-ink: #062f33;
  --linecalc-body: #12383a;
  --linecalc-muted: #426a6c;
  --linecalc-teal: #0b706f;
  --linecalc-aqua: #18b7b1;
  --linecalc-paper: #f5f2e9;
  --linecalc-soft: #f7f5ef;
  --linecalc-line: #c9d9d7;
  --linecalc-white: #fff;
  color: var(--linecalc-body);
}

.linecalc-title-en {
  color: #18b7b1;
  font-size: clamp(0.78rem, 2vw, 1rem);
  font-weight: 900;
  letter-spacing: 0.18em;
  line-height: 1.4;
  margin: 0 0 1rem;
  text-transform: uppercase;
}

.linecalc *,
.linecalc *::before,
.linecalc *::after {
  box-sizing: border-box;
}

.linecalc [hidden] {
  display: none !important;
}

.linecalc-hero {
  background-color: var(--linecalc-paper);
  background-image:
    linear-gradient(rgba(245, 242, 233, 0.83), rgba(245, 242, 233, 0.91)),
    var(--linecalc-cover, radial-gradient(circle at 92% 4%, rgba(24, 183, 177, 0.2), transparent 34%));
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  border: 1px solid rgba(18, 56, 58, 0.16);
  border-radius: 26px;
  margin: 1.25rem 0 1rem;
  overflow: hidden;
  padding: clamp(1.25rem, 5vw, 2.6rem);
  position: relative;
}

.linecalc-eyebrow {
  color: var(--linecalc-teal);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  margin: 0 0 0.5rem;
  text-transform: uppercase;
}

.linecalc-hero h2,
.linecalc-tool h2 {
  color: var(--linecalc-ink);
  line-height: 1.2;
  margin: 0;
}

.linecalc-hero h2 {
  font-size: clamp(1.8rem, 6vw, 3rem);
  max-width: 14em;
}

.linecalc-hero__lead {
  font-size: clamp(1rem, 3.6vw, 1.18rem);
  line-height: 1.85;
  margin: 1rem 0 1.2rem;
  max-width: 48rem;
}

.linecalc-mascot {
  align-items: center;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(11, 112, 111, 0.28);
  border-radius: 20px;
  display: grid;
  gap: clamp(0.7rem, 2.4vw, 1.4rem);
  grid-template-columns: minmax(0, 1fr) clamp(180px, 25vw, 250px);
  margin: 0 0 1.2rem;
  min-height: 190px;
  overflow: hidden;
  padding: clamp(1rem, 3vw, 1.45rem) clamp(1rem, 3vw, 1.55rem) 0;
}

.linecalc-mascot__copy {
  align-self: center;
  padding-bottom: clamp(1rem, 3vw, 1.45rem);
}

.linecalc-mascot__role {
  color: var(--linecalc-teal);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  margin: 0 0 0.28rem;
}

.linecalc-mascot__name {
  color: var(--linecalc-ink);
  font-size: clamp(1.65rem, 4vw, 2.35rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  line-height: 1.2;
  margin: 0;
}

.linecalc-mascot__name span {
  color: var(--linecalc-muted);
  font-size: 0.65em;
  letter-spacing: 0.08em;
}

.linecalc-mascot__copy > p:last-child {
  color: var(--linecalc-body);
  font-size: clamp(0.9rem, 2.6vw, 1rem);
  font-weight: 700;
  line-height: 1.75;
  margin: 0.65rem 0 0;
  max-width: 36rem;
}

.linecalc-mascot__image {
  align-self: end;
  display: block;
  filter: drop-shadow(0 12px 13px rgba(6, 47, 51, 0.16));
  height: auto;
  justify-self: end;
  max-width: 250px;
  width: 100%;
}

.linecalc-hero__promise {
  display: grid;
  gap: 0.65rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0;
}

.linecalc-hero__promise div {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(11, 112, 111, 0.2);
  border-radius: 16px;
  min-width: 0;
  padding: 0.85rem;
}

.linecalc-hero__promise dt {
  color: var(--linecalc-teal);
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  margin: 0 0 0.2rem;
}

.linecalc-hero__promise dd {
  color: var(--linecalc-ink);
  font-size: clamp(0.95rem, 2.6vw, 1.08rem);
  font-weight: 900;
  line-height: 1.35;
  margin: 0;
}

.linecalc-nav {
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid var(--linecalc-line);
  border-radius: 16px;
  display: flex;
  gap: 0.35rem;
  margin: 0 0 1.5rem;
  overflow-x: auto;
  padding: 0.45rem;
  position: sticky;
  scrollbar-width: thin;
  top: 0.5rem;
  z-index: 5;
}

.linecalc-nav a {
  border-radius: 11px;
  color: var(--linecalc-body);
  flex: 1 0 auto;
  font-size: 0.84rem;
  font-weight: 900;
  padding: 0.72rem 0.78rem;
  text-align: center;
  text-decoration: none;
}

.linecalc-nav a:hover,
.linecalc-nav a:focus-visible {
  background: #e8f7f5;
  color: var(--linecalc-ink);
  outline: 3px solid rgba(11, 112, 111, 0.22);
  outline-offset: 1px;
}

.linecalc-tool {
  background: var(--linecalc-white);
  border: 1px solid rgba(18, 56, 58, 0.18);
  border-radius: 24px;
  box-shadow: 0 18px 42px rgba(6, 47, 51, 0.09);
  margin: 1.5rem 0 2rem;
  overflow: hidden;
  padding: clamp(1.15rem, 4.2vw, 2.2rem);
  scroll-margin-top: 5rem;
}

.linecalc-tool__head {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 1.15rem;
}

.linecalc-tool__number {
  align-items: center;
  background: var(--linecalc-ink);
  border-radius: 999px;
  color: #fff;
  display: inline-flex;
  font-size: 0.78rem;
  font-weight: 900;
  height: 2rem;
  justify-content: center;
  width: 2rem;
}

.linecalc-tool h2 {
  font-size: clamp(1.55rem, 5vw, 2.25rem);
}

.linecalc-tool__head p:last-child {
  color: var(--linecalc-muted);
  line-height: 1.75;
  margin: 0.25rem 0 0;
}

.linecalc-mode {
  border: 0;
  display: grid;
  gap: 0.45rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0 0 1rem;
  padding: 0;
}

.linecalc-mode legend {
  color: var(--linecalc-body);
  font-size: 0.82rem;
  font-weight: 900;
  margin-bottom: 0.45rem;
  padding: 0;
}

.linecalc-mode label {
  cursor: pointer;
  position: relative;
}

.linecalc-mode input {
  height: 1px;
  opacity: 0;
  position: absolute;
  width: 1px;
}

.linecalc-mode span {
  align-items: center;
  background: var(--linecalc-soft);
  border: 2px solid var(--linecalc-line);
  border-radius: 13px;
  color: var(--linecalc-body);
  display: flex;
  font-size: 0.88rem;
  font-weight: 900;
  justify-content: center;
  min-height: 46px;
  padding: 0.6rem 0.7rem;
  text-align: center;
}

.linecalc-mode input:checked + span {
  background: #dff5f2;
  border-color: var(--linecalc-teal);
  color: var(--linecalc-ink);
}

.linecalc-mode input:focus-visible + span {
  outline: 3px solid rgba(11, 112, 111, 0.25);
  outline-offset: 2px;
}

.linecalc-fields {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.linecalc-fields--two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.linecalc-fields--four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.linecalc-field {
  color: var(--linecalc-body);
  display: grid;
  font-size: 0.84rem;
  font-weight: 900;
  gap: 0.4rem;
  min-width: 0;
}

.linecalc-field small {
  color: var(--linecalc-muted);
  font-size: 0.73rem;
  font-weight: 600;
  line-height: 1.4;
}

.linecalc-control {
  align-items: center;
  background: var(--linecalc-soft);
  border: 2px solid #bfd3d2;
  border-radius: 13px;
  display: flex;
  min-height: 52px;
  min-width: 0;
  overflow: hidden;
}

.linecalc-control:focus-within {
  border-color: var(--linecalc-teal);
  box-shadow: 0 0 0 4px rgba(24, 183, 177, 0.18);
}

.linecalc-control input,
.linecalc-control select {
  appearance: none;
  background: transparent;
  border: 0;
  color: var(--linecalc-ink);
  font: inherit;
  font-size: 1.08rem;
  font-weight: 900;
  min-width: 0;
  padding: 0.78rem;
  width: 100%;
}

.linecalc-control select {
  background-image:
    linear-gradient(45deg, transparent 50%, var(--linecalc-teal) 50%),
    linear-gradient(135deg, var(--linecalc-teal) 50%, transparent 50%);
  background-position:
    calc(100% - 17px) calc(50% - 2px),
    calc(100% - 11px) calc(50% - 2px);
  background-repeat: no-repeat;
  background-size: 6px 6px, 6px 6px;
  padding-right: 2.2rem;
}

.linecalc-control input:focus,
.linecalc-control select:focus {
  outline: 0;
}

.linecalc-control b {
  color: var(--linecalc-muted);
  flex: 0 0 auto;
  font-size: 0.9rem;
  padding-right: 0.75rem;
}

.linecalc-control--split input {
  border-right: 1px solid var(--linecalc-line);
}

.linecalc-control--split select {
  flex: 0 0 5.3rem;
  padding-left: 0.65rem;
  width: 5.3rem;
}

.linecalc-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.85rem 0 0;
}

/* The converter works faster with direct entry; keep only drag presets. */
.linecalc-presets[aria-label="よく使うPE号数"] {
  display: none;
}

.linecalc-presets button,
.linecalc-copy {
  background: #e8f7f5;
  border: 1px solid #7bb9b5;
  border-radius: 999px;
  color: var(--linecalc-body);
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 900;
  min-height: 42px;
  padding: 0.55rem 0.82rem;
}

.linecalc-presets button:hover,
.linecalc-presets button:focus-visible,
.linecalc-copy:hover,
.linecalc-copy:focus-visible {
  background: var(--linecalc-aqua);
  border-color: var(--linecalc-teal);
  color: var(--linecalc-ink);
  outline: 3px solid rgba(11, 112, 111, 0.22);
  outline-offset: 2px;
}

.linecalc-result {
  background: var(--linecalc-ink);
  border: 2px solid var(--linecalc-ink);
  border-radius: 18px;
  color: #fff;
  display: grid;
  gap: 0.32rem;
  margin-top: 1rem;
  padding: 1.05rem 1.15rem;
}

.linecalc-result.is-error {
  background: #fff4ea;
  border-color: #a34e00;
  color: #542900;
}

.linecalc-result__label {
  color: #bde9e6;
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.linecalc-result.is-error .linecalc-result__label {
  color: #713800;
}

.linecalc-result strong {
  color: inherit;
  font-size: clamp(1.35rem, 5vw, 2rem);
  line-height: 1.3;
}

.linecalc-result p {
  color: #d9eeee;
  font-size: 0.88rem;
  line-height: 1.6;
  margin: 0;
}

.linecalc-result.is-error p {
  color: #713800;
}

.linecalc-result__row {
  align-items: end;
  display: flex;
  gap: 0.75rem;
  justify-content: space-between;
}

.linecalc-result__row > div {
  display: grid;
  gap: 0.22rem;
  min-width: 0;
}

.linecalc-copy {
  align-self: center;
  background: transparent;
  border-color: #7bb9b5;
  color: #fff;
  flex: 0 0 auto;
}

.linecalc-result.is-error .linecalc-copy {
  border-color: #a34e00;
  color: #542900;
}

.linecalc-result__subgrid {
  border-top: 1px solid rgba(217, 238, 238, 0.25);
  display: grid;
  gap: 0.55rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 0.55rem;
  padding-top: 0.7rem;
}

.linecalc-result.is-error .linecalc-result__subgrid {
  border-color: rgba(113, 56, 0, 0.25);
}

.linecalc-result__subgrid span {
  color: #bde9e6;
  font-size: 0.76rem;
  font-weight: 800;
}

.linecalc-result.is-error .linecalc-result__subgrid span {
  color: #713800;
}

.linecalc-note {
  background: var(--linecalc-soft);
  border-left: 4px solid var(--linecalc-teal);
  border-radius: 0 12px 12px 0;
  color: var(--linecalc-muted);
  font-size: 0.82rem;
  line-height: 1.7;
  margin: 0.9rem 0 0;
  padding: 0.75rem 0.9rem;
}

.linecalc-planner {
  background: #eef9f7;
  border: 2px solid #7bb9b5;
  border-radius: 18px;
  color: var(--linecalc-body);
  margin-top: 1rem;
  padding: 0.95rem 1rem 1rem;
}

.linecalc-planner summary {
  color: var(--linecalc-ink);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 900;
  line-height: 1.5;
}

.linecalc-planner summary::marker {
  color: var(--linecalc-teal);
}

.linecalc-planner__lead {
  color: var(--linecalc-muted);
  font-size: 0.82rem;
  line-height: 1.65;
  margin: 0.65rem 0 0.85rem;
}

.linecalc-planner__result {
  background: #fff;
  border: 1px solid #a9cfcc;
  border-radius: 14px;
  display: grid;
  gap: 0.28rem;
  margin-top: 0.85rem;
  padding: 0.85rem 0.95rem;
}

.linecalc-planner__result strong {
  color: var(--linecalc-ink);
  font-size: clamp(1.05rem, 3.4vw, 1.3rem);
  line-height: 1.45;
}

.linecalc-planner__result p {
  color: var(--linecalc-body);
  font-size: 0.82rem;
  line-height: 1.55;
  margin: 0;
}

.linecalc-purchase {
  background: var(--linecalc-paper);
  border: 1px solid #9fc4c1;
  border-radius: 18px;
  margin-top: 1rem;
  padding: 1rem;
}

.linecalc-purchase h3 {
  color: var(--linecalc-ink);
  margin: 0 0 0.8rem;
}

.linecalc-purchase__grid {
  display: grid;
  gap: 0.7rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.linecalc-purchase__grid section {
  background: #fff;
  border: 1px solid var(--linecalc-line);
  border-radius: 14px;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 0.85rem;
}

.linecalc-purchase__grid strong,
.linecalc-purchase--compact > strong {
  color: var(--linecalc-ink);
}

.linecalc-purchase__grid p {
  color: var(--linecalc-muted);
  font-size: 0.78rem;
  line-height: 1.55;
  margin: 0.35rem 0 0.65rem;
}

.linecalc-purchase__links {
  margin-top: auto;
}

.linecalc-purchase .isonosuke-affiliate-button {
  align-items: center;
  background: var(--linecalc-ink);
  border: 2px solid var(--linecalc-ink);
  border-radius: 12px;
  color: #fff;
  display: flex;
  font-size: 0.78rem;
  font-weight: 900;
  justify-content: center;
  line-height: 1.45;
  min-height: 44px;
  padding: 0.65rem 0.72rem;
  text-align: center;
  text-decoration: none;
}

.linecalc-purchase .isonosuke-affiliate-button:hover,
.linecalc-purchase .isonosuke-affiliate-button:focus-visible {
  background: var(--linecalc-aqua);
  border-color: var(--linecalc-teal);
  color: var(--linecalc-ink);
  outline: 3px solid rgba(11, 112, 111, 0.22);
  outline-offset: 2px;
}

.linecalc-purchase__notice {
  color: #385e60;
  font-size: 0.64rem;
  line-height: 1.4;
  margin: 0.7rem 0 0;
}

.linecalc-purchase--compact {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.linecalc-purchase--compact .linecalc-purchase__links {
  margin: 0;
}

.linecalc-purchase--compact .linecalc-purchase__notice {
  flex-basis: 100%;
  margin-top: 0;
}

.linecalc-table-wrap {
  border: 1px solid var(--linecalc-line);
  border-radius: 18px;
  margin: 1rem 0 1.5rem;
  overflow-x: auto;
}

.linecalc-table {
  border-collapse: collapse;
  margin: 0;
  min-width: 620px;
  width: 100%;
}

.linecalc-table caption {
  background: var(--linecalc-paper);
  color: var(--linecalc-body);
  font-weight: 900;
  padding: 0.82rem 1rem;
  text-align: left;
}

.linecalc-table th {
  background: var(--linecalc-ink);
  color: #fff;
}

.linecalc-table th,
.linecalc-table td {
  border-bottom: 1px solid #d8e3e1;
  padding: 0.72rem 0.85rem;
  text-align: left;
  white-space: nowrap;
}

.linecalc-table tbody tr:nth-child(even) {
  background: var(--linecalc-soft);
}

.linecalc-formulas {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 1rem 0 1.5rem;
}

.linecalc-formulas article {
  background: var(--linecalc-paper);
  border: 1px solid var(--linecalc-line);
  border-radius: 16px;
  padding: 1rem;
}

.linecalc-formulas h3 {
  color: var(--linecalc-ink);
  font-size: 1rem;
  margin: 0 0 0.5rem;
}

.linecalc-formulas code {
  background: #fff;
  border: 1px solid var(--linecalc-line);
  border-radius: 8px;
  color: var(--linecalc-body);
  display: block;
  font-size: 0.82rem;
  line-height: 1.6;
  overflow-wrap: anywhere;
  padding: 0.65rem;
  white-space: normal;
}

.linecalc-source-box {
  background: var(--linecalc-soft);
  border: 1px solid var(--linecalc-line);
  border-radius: 18px;
  margin: 1.25rem 0;
  padding: 1rem 1.1rem;
}

.linecalc-source-box h3 {
  color: var(--linecalc-ink);
  margin-top: 0;
}

.linecalc-source-box li {
  line-height: 1.7;
  margin-bottom: 0.45rem;
}

@media (max-width: 860px) {
  .linecalc-hero__promise,
  .linecalc-fields--four,
  .linecalc-purchase__grid,
  .linecalc-formulas {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .linecalc-fields {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .linecalc-hero {
    border-radius: 20px;
  }

  .linecalc-mascot {
    grid-template-columns: 1fr;
    padding: 1rem 1rem 0;
    text-align: center;
  }

  .linecalc-mascot__copy {
    padding-bottom: 0;
  }

  .linecalc-mascot__image {
    justify-self: center;
    max-width: 205px;
  }

  .linecalc-hero__promise,
  .linecalc-fields,
  .linecalc-fields--two,
  .linecalc-fields--four,
  .linecalc-purchase__grid,
  .linecalc-formulas {
    grid-template-columns: 1fr;
  }

  .linecalc-nav {
    margin-left: -0.4rem;
    margin-right: -0.4rem;
  }

  .linecalc-tool {
    border-radius: 20px;
    margin-left: -0.15rem;
    margin-right: -0.15rem;
  }

  .linecalc-result__row {
    align-items: stretch;
    flex-direction: column;
  }

  .linecalc-copy {
    align-self: stretch;
    color: #fff;
  }

  .linecalc-result__subgrid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .linecalc *,
  .linecalc *::before,
  .linecalc *::after {
    scroll-behavior: auto !important;
  }
}