@font-face {
  font-family: "JetBrains Mono";
  src:
    local("JetBrains Mono"),
    local("JetBrainsMono-Regular"),
    url("../fonts/JetBrainsMono-Regular.woff2") format("woff2"),
    url("../fonts/JetBrainsMono-Regular.woff") format("woff");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src:
    local("JetBrains Mono"),
    local("JetBrainsMono-Medium"),
    url("../fonts/JetBrainsMono-Medium.woff2") format("woff2"),
    url("../fonts/JetBrainsMono-Medium.woff") format("woff");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src:
    local("JetBrains Mono"),
    local("JetBrainsMono-SemiBold"),
    url("../fonts/JetBrainsMono-SemiBold.woff2") format("woff2"),
    url("../fonts/JetBrainsMono-SemiBold.woff") format("woff");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #f5f5f3;
  --bg-panel: #ffffff;
  --text: #101214;
  --muted: #5e646b;
  --accent: #2c7a57;
  --accent-strong: #246647;
  --border: #d6d9dd;
  --shadow: 0 8px 18px rgba(0, 0, 0, 0.08);
  --font: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111214;
    --bg-panel: #16181b;
    --text: #e7e7e4;
    --muted: #a0a6ad;
    --accent: #6fb38a;
    --accent-strong: #5aa178;
    --border: #2b2f36;
    --shadow: 0 8px 20px rgba(0, 0, 0, 0.28);
  }
}

html[data-theme="light"] {
  --bg: #f5f5f3;
  --bg-panel: #ffffff;
  --text: #101214;
  --muted: #5e646b;
  --accent: #2c7a57;
  --accent-strong: #246647;
  --border: #d6d9dd;
  --shadow: 0 8px 18px rgba(0, 0, 0, 0.08);
}

html[data-theme="dark"] {
  --bg: #111214;
  --bg-panel: #16181b;
  --text: #e7e7e4;
  --muted: #a0a6ad;
  --accent: #6fb38a;
  --accent-strong: #5aa178;
  --border: #2b2f36;
  --shadow: 0 8px 20px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-strong);
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(1120px, 100% - 32px);
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  gap: 20px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.logo img {
  border-radius: 4px;
  border: 1px solid var(--border);
}

.main {
  padding: 32px 0 40px;
}

.page-title {
  font-size: clamp(18px, 2.6vw, 28px);
  font-weight: 600;
  margin: 0 0 16px;
}

.converter {
  margin-top: 20px;
}

.card {
  border: 1px solid var(--border);
  padding: 20px;
  background: var(--bg-panel);
  box-shadow: var(--shadow);
}

.field-grid {
  display: grid;
  gap: 12px;
}

.field {
  display: grid;
  grid-template-columns: minmax(200px, 1fr) minmax(0, 1.2fr);
  align-items: center;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.field:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.field label {
  font-weight: 600;
  color: var(--text);
}

.field-meta {
  display: inline-block;
  margin-left: 8px;
  font-weight: 500;
  color: var(--muted);
  font-size: 12px;
}

.converter-input {
  width: 100%;
  padding: 12px 12px;
  border: 1px solid var(--border);
  font-size: 15px;
  font-family: var(--font);
  background: var(--bg-panel);
  color: var(--text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.converter-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: none;
}

.toggle-row {
  margin: 16px 0 8px;
}

.toggle-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  border: 1px solid var(--border);
  color: var(--text);
  background: transparent;
  font-weight: 600;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.toggle-button:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

.price-row {
  margin-top: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  background: var(--bg-panel);
}

.price-label {
  font-weight: 600;
  margin-bottom: 4px;
}

.price-meta {
  color: var(--muted);
  font-size: 13px;
}

.price-value {
  font-size: 16px;
  font-weight: 700;
}

.bottom-note {
  padding: 0 0 24px;
  color: var(--muted);
}

.bottom-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
}

.site-footer {
  padding: 16px 0 32px;
  color: var(--muted);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border);
  padding-top: 14px;
  gap: 12px;
  font-size: 13px;
}

.footer-menu {
  display: flex;
  gap: 12px;
  font-weight: 600;
}

.footer-menu a {
  color: var(--text);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.theme-toggle button {
  padding: 6px 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-family: var(--font);
  font-size: 12px;
  cursor: pointer;
}

.theme-toggle button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

@media (max-width: 840px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .price-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-menu {
    flex-direction: column;
    gap: 6px;
  }
}