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

:root {
  --teal-header: #0a5c5c;
  --bg-page: #eef2f6;
  --text: #1f2937;
  --muted: #64748b;
  --card: #ffffff;
  --line: #d8e0ea;
  --code-bg: #e8f4f4;
  --code-text: #0a5c5c;
}

html,
body {
  min-height: 100%;
}

body.fmt-app {
  font-family: "Inter", system-ui, sans-serif;
  color: var(--text);
  background: var(--bg-page);
  padding-bottom: 76px;
}

.fmt-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px 48px;
  background: var(--teal-header);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.fmt-header h1 {
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.fmt-back {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  text-decoration: none;
  font-size: 1.6rem;
  line-height: 1;
  font-weight: 700;
}

.fmt-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 14px 12px 24px;
}

.fmt-intro {
  margin-bottom: 14px;
  padding: 12px 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--muted);
}

.fmt-intro code {
  font-size: 0.78rem;
  color: var(--code-text);
  background: var(--code-bg);
  padding: 1px 5px;
  border-radius: 4px;
}

.fmt-section {
  margin-bottom: 12px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.fmt-section h2 {
  padding: 10px 14px;
  font-size: 0.78rem;
  font-weight: 800;
  color: #fff;
  background: var(--teal-header);
  letter-spacing: 0.02em;
}

.fmt-list {
  list-style: none;
}

.fmt-list li {
  display: grid;
  gap: 4px;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
}

.fmt-list li:first-child {
  border-top: none;
}

.fmt-list code {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--code-text);
  background: var(--code-bg);
  padding: 7px 9px;
  border-radius: 8px;
  overflow-x: auto;
  white-space: nowrap;
}

.fmt-list span {
  font-size: 0.74rem;
  color: var(--muted);
  line-height: 1.35;
}

.fmt-note {
  margin-top: 8px;
  padding: 10px 14px;
  font-size: 0.76rem;
  color: var(--muted);
  background: #fff8e7;
  border: 1px solid #f0e0b8;
  border-radius: 10px;
  line-height: 1.4;
}

.bottom-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 30;
  display: flex;
  background: var(--teal-header);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 6px 2px calc(6px + env(safe-area-inset-bottom));
}

.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 4px 2px;
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-size: 0.55rem;
  font-weight: 700;
}

.nav-item.active,
.nav-item:hover {
  color: #ffd54f;
}

.nav-item__icon {
  width: 22px;
  height: 22px;
  display: block;
  background: currentColor;
  mask-size: contain;
  mask-repeat: no-repeat;
  mask-position: center;
  -webkit-mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
}

.nav-item__icon--jantri {
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Crect x='3' y='3' width='7' height='7' rx='1'/%3E%3Crect x='14' y='3' width='7' height='7' rx='1'/%3E%3Crect x='3' y='14' width='7' height='7' rx='1'/%3E%3Crect x='14' y='14' width='7' height='7' rx='1'/%3E%3C/svg%3E");
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Crect x='3' y='3' width='7' height='7' rx='1'/%3E%3Crect x='14' y='3' width='7' height='7' rx='1'/%3E%3Crect x='3' y='14' width='7' height='7' rx='1'/%3E%3Crect x='14' y='14' width='7' height='7' rx='1'/%3E%3C/svg%3E");
}

.nav-item__icon--cutting {
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Ccircle cx='6' cy='6' r='3'/%3E%3Ccircle cx='6' cy='18' r='3'/%3E%3Cline x1='20' y1='4' x2='8.12' y2='15.88'/%3E%3Cline x1='14.47' y1='14.48' x2='20' y2='20'/%3E%3Cline x1='8.12' y1='8.12' x2='12' y2='12'/%3E%3C/svg%3E");
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Ccircle cx='6' cy='6' r='3'/%3E%3Ccircle cx='6' cy='18' r='3'/%3E%3Cline x1='20' y1='4' x2='8.12' y2='15.88'/%3E%3Cline x1='14.47' y1='14.48' x2='20' y2='20'/%3E%3Cline x1='8.12' y1='8.12' x2='12' y2='12'/%3E%3C/svg%3E");
}

.nav-item__icon--result {
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cpath d='M22 11.08V12a10 10 0 1 1-5.93-9.14'/%3E%3Cpolyline points='22 4 12 14.01 9 11.01'/%3E%3C/svg%3E");
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cpath d='M22 11.08V12a10 10 0 1 1-5.93-9.14'/%3E%3Cpolyline points='22 4 12 14.01 9 11.01'/%3E%3C/svg%3E");
}

.nav-item__icon--hisab {
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cline x1='12' y1='1' x2='12' y2='23'/%3E%3Cpath d='M17 5H9.5a3.5 3.5 0 0 0 0 7h5a3.5 3.5 0 0 1 0 7H6'/%3E%3C/svg%3E");
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cline x1='12' y1='1' x2='12' y2='23'/%3E%3Cpath d='M17 5H9.5a3.5 3.5 0 0 0 0 7h5a3.5 3.5 0 0 1 0 7H6'/%3E%3C/svg%3E");
}

.nav-item__icon--lenden {
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cpolyline points='17 1 21 5 17 9'/%3E%3Cpath d='M3 11V9a4 4 0 0 1 4-4h14'/%3E%3Cpolyline points='7 23 3 19 7 15'/%3E%3Cpath d='M21 13v2a4 4 0 0 1-4 4H3'/%3E%3C/svg%3E");
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cpolyline points='17 1 21 5 17 9'/%3E%3Cpath d='M3 11V9a4 4 0 0 1 4-4h14'/%3E%3Cpolyline points='7 23 3 19 7 15'/%3E%3Cpath d='M21 13v2a4 4 0 0 1-4 4H3'/%3E%3C/svg%3E");
}

.nav-item__icon--delete {
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cpolyline points='3 6 5 6 21 6'/%3E%3Cpath d='M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6m3 0V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2'/%3E%3C/svg%3E");
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cpolyline points='3 6 5 6 21 6'/%3E%3Cpath d='M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6m3 0V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2'/%3E%3C/svg%3E");
}

.nav-item__icon--menu {
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cline x1='3' y1='12' x2='21' y2='12'/%3E%3Cline x1='3' y1='6' x2='21' y2='6'/%3E%3Cline x1='3' y1='18' x2='21' y2='18'/%3E%3C/svg%3E");
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cline x1='3' y1='12' x2='21' y2='12'/%3E%3Cline x1='3' y1='6' x2='21' y2='6'/%3E%3Cline x1='3' y1='18' x2='21' y2='18'/%3E%3C/svg%3E");
}