/* ==============================
   SITE THEME (standard)
============================== */
/* ==============================
   Local fonts (no external CDN)
============================== */

/* Poppins */
@font-face {
  font-family: 'Poppins';
  src: url('fonts/Poppins-Light.ttf') format('truetype');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Poppins';
  src: url('fonts/Poppins-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Poppins';
  src: url('fonts/Poppins-Medium.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Poppins';
  src: url('fonts/Poppins-SemiBold.ttf') format('truetype');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Poppins';
  src: url('fonts/Poppins-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* IBM Plex Mono */
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('fonts/IBMPlexMono-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('fonts/IBMPlexMono-Medium.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('fonts/IBMPlexMono-SemiBold.ttf') format('truetype');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* Image protection: prevent selecting/dragging images out of the page. */
img {
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
  -webkit-user-drag: none;
  user-drag: none;
  pointer-events: auto;
} 

/* Text production: prevent copy paste*/
/*body {
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
}*/

:root {
  --bg-light: #f5f5f5;
  --nav-bg: rgba(255, 255, 255, 0.8);
  --accent: #800000;
  --text-dark: #013938;

  /* explorer-specific, derived from the theme above */
  --panel: rgba(255, 255, 255, 0.88);
  --panel-2: rgba(1, 57, 56, 0.05);
  --line: rgba(1, 57, 56, 0.14);
  --line-strong: rgba(1, 57, 56, 0.28);
  --text-dim: rgba(1, 57, 56, 0.62);
  --text-faint: rgba(1, 57, 56, 0.40);
  --gold: #b8860b;
  --s-block: #3f6ea0;
  --p-block: #3f8f6f;
  --d-block: #a8703f;
  --f-block: #7a4a9e;
  --radioactive: #a83a3a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  background: var(--bg-light);
  color: var(--text-dark);
  overflow-x: hidden;
  position: relative;
}

/* Cyber Background Canvas */
canvas#cyber-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

/* Header */
header {
  background-color: var(--nav-bg);
  color: var(--text-dark);
  padding: 10px;
  position: relative;
  z-index: 10;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
.header-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.logo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 0.5rem;
  border: 0px solid var(--accent);
}
.header-text h1 {
  margin: 5px 0;
  font-size: 1rem;
  font-weight: bold;
  text-align: center;
  color: var(--text-dark);
}

/* Sub Header */
.site-tagline {
  margin: 8px 0 0;
  text-align: center;
  line-height: 1.45;
  font-family: 'IBM Plex Mono', monospace;
}
.site-tagline span {
  display: block;
  color: var(--accent);
  font-style: italic;
}
.site-tagline [lang="ta"] {
  font-size: 0.78rem;
  font-weight: 500;
}
.site-tagline .tagline-en {
  font-size: 0.68rem;
  font-weight: 400;
  margin-top: 2px;
}

/* Navigation */
nav {
  background: var(--nav-bg);
  padding: 12px;
  text-align: center;
  position: relative;
  z-index: 10;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
nav a {
  color: var(--text-dark);
  margin: 0 10px;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.05rem;
  transition: color 0.3s;
  cursor: pointer;
}
nav a:hover {
  color: var(--accent);
  text-decoration: underline;
}
.menu-toggle {
  display: none;
  background: var(--nav-bg);
  color: var(--text-dark);
  padding: 12px;
  text-align: right;
  font-size: 1.1rem;
  cursor: pointer;
  position: relative;
  z-index: 10;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

/* Security notice */
#securityNotice {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--text-dark, #013938);
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 9999;
  box-shadow: 0 6px 18px rgba(0,0,0,0.25);
}
#securityNotice.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Footer */
footer {
  text-align: center;
  font-size: 0.8rem;
  color: #666;
  padding: 20px;
  background: #f0f0f0;
  margin-top: 40px;
  position: relative;
  z-index: 5;
}

@media (max-width: 600px) {
  .menu-toggle { display: block; }
  nav { display: none; flex-direction: column; }
  nav.show { display: flex; }
  nav a { display: block; margin: 10px 0; padding: 10px; }
}
@media (min-width: 601px) {
  .header-content { flex-direction: row; align-items: center; justify-content: center; gap: 15px; }
}

/* ==============================
   PERIODIC TABLE EXPLORER
============================== */
.explorer-wrap { max-width: 1180px; margin: 0 auto; padding: 28px 20px 10px; position: relative; z-index: 5; }

.explorer-intro { margin-bottom: 22px; }
.eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 6px;
}
.explorer-intro h2 {
  font-size: 26px; margin: 0 0 6px; font-weight: 700; color: var(--text-dark);
}
.explorer-intro p { color: var(--text-dim); font-size: 14px; max-width: 620px; line-height: 1.55; margin: 0; text-align: justify; text-justify: inter-word; }
.explorer-intro p + p { margin-top: 10px; }

/* About / profile section — photo on top, centered */
.about-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 10px;
  padding: 8px 0 30px;
  margin: 0 0 18px;
  border-bottom: 1px solid rgba(0,0,0,0.08);
}
.about-img .proimg {
  width: 128px;
  height: 128px;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid var(--accent);
  display: block;
  box-shadow: 0 6px 16px rgba(0,0,0,0.12);
}
.about-name { 
  margin: 4px 0 0;
  color: var(--text-dark);
  font-size: 17px;
  line-height: 1.4;
}
.about-role {
  margin: 0;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  line-height: 1.4;
}
.about-text strong { color: var(--accent); }

.about-email {
  margin: 4px 0 0;
}
.about-email a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--accent);
  text-decoration: none;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  line-height: 1.4;
}
.about-email a:hover {
  text-decoration: underline;
}
.mail-icon {
  color: var(--accent);
  flex-shrink: 0;
}

/* Welcome (left) / About Me (right) two-column layout */
.home-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.home-col { margin-bottom: 0; }
@media (max-width: 760px) {
  .home-columns { grid-template-columns: 1fr; gap: 22px; }
}

.search-row { margin: 18px 0 20px; }
.search-box { position: relative; max-width: 420px; }
.search-box input {
  width: 100%;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  color: var(--text-dark);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px;
  padding: 12px 14px 12px 38px;
  border-radius: 4px;
  outline: none;
  transition: border-color .15s;
}
.search-box input:focus { border-color: var(--accent); }
.search-box::before {
  content: "\25CE";
  position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
  color: var(--accent); font-size: 14px; pointer-events: none;
}
.search-hint { font-size: 11px; color: var(--text-faint); margin-top: 6px; font-family: 'IBM Plex Mono', monospace; }
.suggestions {
  position: absolute; top: calc(100% + 4px); left: 0; right: 0;
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  max-height: 280px; overflow-y: auto;
  z-index: 30;
  display: none;
  box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}
.suggestions.show { display: block; }
.suggestion-item {
  padding: 9px 14px; cursor: pointer; font-size: 13px;
  display: flex; justify-content: space-between; align-items: center;
  border-bottom: 1px solid var(--line);
}
.suggestion-item:hover, .suggestion-item.active { background: rgba(128,0,0,0.06); }
.suggestion-item .sym { font-family: 'IBM Plex Mono', monospace; color: var(--accent); font-weight: 600; }
.suggestion-item .z { color: var(--text-faint); font-family: 'IBM Plex Mono', monospace; font-size: 11px; }

/* PTable block wise filter*/
.legend { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 14px; font-size: 11px; color: var(--text-dim); font-family: 'IBM Plex Mono', monospace; }
.legend span { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; padding: 2px 6px; border-radius: 4px; transition: background 0.15s; }
.legend span:hover { background: rgba(0,0,0,0.05); }
.legend span.active { background: rgba(0,0,0,0.08); font-weight: 600; }
.cell.dimmed { filter: grayscale(1); opacity: 0.35; transition: filter 0.2s, opacity 0.2s; }
.legend i { width: 10px; height: 10px; display: inline-block; border-radius: 2px; }

.ptable-frame {
  padding: 18px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(128,0,0,0.05), rgba(1,57,56,0.05) 50%, rgba(184,134,11,0.05));
  border: 1px solid var(--line-strong);
  box-shadow: 0 6px 24px rgba(1,57,56,0.06);
  margin-bottom: 34px;
}
.ptable {
  display: grid;
  grid-template-columns: repeat(18, minmax(0,1fr));
  gap: 3px;
  margin-bottom: 0;
}
.cell {
  aspect-ratio: 1/1;
  background: linear-gradient(155deg, rgba(255,255,255,0.95), rgba(1,57,56,0.05));
  border: 1px solid var(--line);
  border-left: 3px solid transparent;
  padding: 3px 4px;
  cursor: pointer;
  display: flex; flex-direction: column; justify-content: space-between;
  transition: transform .15s, border-color .15s, box-shadow .15s, background .15s;
  position: relative;
  min-width: 0;
  border-radius: 3px;
}
.cell:hover { transform: translateY(-3px) scale(1.03); border-color: var(--accent); z-index: 2; box-shadow: 0 8px 16px rgba(128,0,0,0.18); }
.cell.selected { border-color: var(--gold); border-width: 2px; background: linear-gradient(155deg, #fff, rgba(184,134,11,0.14)); box-shadow: 0 6px 18px rgba(184,134,11,0.25); }
.cell .z { font-family: 'IBM Plex Mono', monospace; font-size: 9px; color: var(--text-faint); }
.cell .sym { font-family: 'Poppins', sans-serif; font-weight: 700; font-size: clamp(11px,1.6vw,15px); line-height: 1; color: var(--text-dark); }
.cell .name { font-size: 7.5px; color: var(--text-dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cell.block-s { border-left-color: var(--s-block); background: linear-gradient(155deg, rgba(63,110,160,0.16), rgba(255,255,255,0.9)); }
.cell.block-p { border-left-color: var(--p-block); background: linear-gradient(155deg, rgba(63,143,111,0.16), rgba(255,255,255,0.9)); }
.cell.block-d { border-left-color: var(--d-block); background: linear-gradient(155deg, rgba(168,112,63,0.16), rgba(255,255,255,0.9)); }
.cell.block-f { border-left-color: var(--f-block); background: linear-gradient(155deg, rgba(122,74,158,0.16), rgba(255,255,255,0.9)); }
.cell.placeholder { cursor: default; background: transparent; border-style: dashed; justify-content: center; align-items: center; }
.cell.placeholder:hover { transform: none; border-color: var(--line); box-shadow: none; }
.cell.placeholder span { font-family: 'IBM Plex Mono', monospace; font-size: 9px; color: var(--text-faint); }
.cell.spacer { background: transparent; border: none; cursor: default; }
.cell.spacer:hover { transform: none; box-shadow: none; }

#detail { display: none; }
#detail.show { display: block; }

.detail-header {
  display: flex; gap: 22px; align-items: center;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  padding: 22px 26px;
  margin-bottom: 22px;
  flex-wrap: wrap;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}
.big-sym { font-family: 'Poppins', sans-serif; font-weight: 700; font-size: 56px; line-height: 1; color: var(--accent); min-width: 80px; }
.head-meta { flex: 1; min-width: 200px; }
.head-meta h2 { font-size: 24px; margin: 0 0 4px; font-weight: 600; color: var(--text-dark); }
.head-meta .sub { font-family: 'IBM Plex Mono', monospace; font-size: 12px; color: var(--text-dim); display: flex; gap: 16px; flex-wrap: wrap; }
.head-badges { display: flex; gap: 8px; flex-wrap: wrap; }
.badge {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10.5px; letter-spacing: .03em;
  padding: 5px 10px; border-radius: 3px;
  border: 1px solid var(--line-strong);
  color: var(--text-dim); white-space: nowrap;
  background: #fff;
}
.badge.radioactive { border-color: var(--radioactive); color: var(--radioactive); }
.badge.stable { border-color: var(--accent); color: var(--accent); }

.sections { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px,1fr)); gap: 16px; margin-bottom: 10px; }
.section { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; box-shadow: 0 2px 10px rgba(0,0,0,0.04); min-width: 0; }
.section h3 {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent);
  margin: 0; padding: 12px 16px;
  border-bottom: 1px solid var(--line-strong);
  background: var(--panel-2);
}
.field-row { display: grid; grid-template-columns: minmax(0,40%) minmax(0,60%); padding: 9px 16px; border-bottom: 1px solid var(--line); font-size: 12.5px; gap: 10px; }
.field-row:last-child { border-bottom: none; }
.field-row .k { color: var(--text-dim); min-width: 0; overflow-wrap: break-word; }
.field-row .v { font-family: 'IBM Plex Mono', monospace; color: var(--text-dark); line-height: 1.45; min-width: 0; overflow-wrap: break-word; word-break: break-word; hyphens: auto; white-space: normal; }

.empty-state {
  text-align: center; padding: 70px 20px; color: var(--text-faint);
  border: 1px dashed var(--line-strong); border-radius: 6px;
  font-family: 'IBM Plex Mono', monospace; font-size: 13px;
  background: var(--panel);
}
.empty-state .big { font-size: 34px; color: var(--text-dim); margin-bottom: 10px; font-family: 'Poppins', sans-serif; }

.sources-note {
  max-width: 1180px; margin: 30px auto 0; padding: 16px 20px;
  font-size: 11.5px; color: var(--text-dim); line-height: 1.6;
  border-top: 1px solid var(--line-strong);
  font-family: 'IBM Plex Mono', monospace;
}

@media (max-width: 720px) {
  .ptable { grid-template-columns: repeat(18, minmax(16px,1fr)); }
  .cell .name { display: none; }
  .big-sym { font-size: 40px; }
}


/* reCAPTCHA */
#humanGate {
  position: fixed;
  inset: 0;
  background: var(--bg-light, #f5f5f5);
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
}
.human-gate-box {
  background: #fff;
  border: 1px solid rgba(0,0,0,0.1);
  border-radius: 12px;
  padding: 28px 32px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0,0,0,0.15);
  max-width: 320px;
}
.human-gate-title {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 10px;
}
.human-gate-question {
  font-size: 18px;
  color: var(--text-dark);
  margin: 0 0 14px;
}
.human-gate-input {
  width: 100px;
  padding: 8px;
  font-size: 16px;
  text-align: center;
  border: 1px solid rgba(0,0,0,0.2);
  border-radius: 6px;
  margin-bottom: 12px;
}
.human-gate-btn {
  display: block;
  width: 100%;
  padding: 10px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
}
.human-gate-btn:hover { opacity: 0.9; }
.human-gate-error {
  color: #c0392b;
  font-size: 13px;
  margin: 10px 0 0;
  min-height: 16px;
}

.human-gate-logo {
  width: 128px;
  height: 128px;
  border-radius: 50%;
  object-fit: cover;
  /*border: 2px solid var(--text-dark); */
  margin-bottom: 14px;
}

/* ==============================
   STOICHIOMETRY CALCULATOR UI
============================== */
.calc-tabs { display: flex; gap: 6px; margin: 20px 0 22px; flex-wrap: wrap; }
.calc-tab {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px; padding: 10px 18px;
  background: var(--panel); border: 1px solid var(--line-strong);
  border-radius: 4px; cursor: pointer; color: var(--text-dim);
  transition: all .15s;
}
.calc-tab:hover { border-color: var(--accent); color: var(--accent); }
.calc-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.calc-panel { display: none; }
.calc-panel.active { display: block; }

.calc-card {
  background: var(--panel); border: 1px solid var(--line-strong); border-radius: 8px;
  padding: 26px 28px; box-shadow: 0 4px 16px rgba(0,0,0,0.06); margin-bottom: 20px;
}
.calc-card h3 { margin: 0 0 6px; font-size: 19px; color: var(--text-dark); }
.calc-formula {
  font-family: 'IBM Plex Mono', monospace; font-size: 13px; color: var(--accent);
  background: var(--panel-2); padding: 10px 14px; border-radius: 4px; margin: 10px 0 20px;
  display: inline-block;
}
.calc-compound-label {
  display: block; font-size: 12px; color: var(--text-dim); margin-bottom: 14px;
  font-family: 'IBM Plex Mono', monospace;
}
.calc-compound-label input { display: block; margin-top: 5px; }

.calc-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px; margin-bottom: 18px;
  align-items: end;
}
.calc-grid label {
  display: flex; flex-direction: column; gap: 6px; font-size: 12px; color: var(--text-dim);
  font-family: 'IBM Plex Mono', monospace;
}
.calc-grid input, .cell-in {
  font-family: 'IBM Plex Mono', monospace; font-size: 13px; padding: 8px 10px;
  border: 1px solid var(--line-strong); border-radius: 4px; background: #fff; color: var(--text-dark);
  width: 100%; box-sizing: border-box;
}
.calc-grid input:focus, .cell-in:focus { outline: none; border-color: var(--accent); }

.calc-btn {
  font-family: 'IBM Plex Mono', monospace; font-size: 13px; font-weight: 500;
  background: var(--accent); color: #fff; border: none; border-radius: 4px;
  padding: 11px 22px; cursor: pointer; transition: opacity .15s;
}
.calc-btn:hover { opacity: 0.88; }
.calc-btn-sm {
  font-family: 'IBM Plex Mono', monospace; font-size: 11.5px;
  background: transparent; color: var(--accent); border: 1px dashed var(--accent);
  border-radius: 4px; padding: 7px 14px; cursor: pointer; margin-top: 8px;
}
.calc-btn-sm:hover { background: rgba(128,0,0,0.06); }

.calc-result { margin-top: 20px; }
.calc-error {
  font-family: 'IBM Plex Mono', monospace; font-size: 12.5px; color: var(--radioactive);
  background: rgba(168,58,58,0.08); border: 1px solid var(--radioactive);
  border-radius: 4px; padding: 10px 14px;
}
.result-table { width: 100%; border-collapse: collapse; font-family: 'IBM Plex Mono', monospace; font-size: 13px; }
.result-table td { padding: 9px 12px; border-bottom: 1px solid var(--line); }
.result-table td:first-child { color: var(--text-dim); width: 45%; }
.result-table td:last-child { color: var(--text-dark); font-weight: 500; }
.result-table tr.result-highlight td { background: var(--panel-2); }
.result-table tr.result-highlight td:last-child { color: var(--accent); font-weight: 600; }

.calc-note {
  font-size: 11px; color: var(--text-faint); font-family: 'IBM Plex Mono', monospace;
  line-height: 1.6; margin-top: 18px;
}

.table-scroll { overflow-x: auto; }
.calc-table { width: 100%; border-collapse: collapse; min-width: 640px; }
.calc-table th {
  font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; text-transform: uppercase;
  letter-spacing: .04em; color: var(--accent); background: var(--panel-2);
  padding: 8px 8px; text-align: left; border-bottom: 2px solid var(--line-strong);
}
.calc-table td { padding: 6px 6px; border-bottom: 1px solid var(--line); }
.calc-table .cell-in.narrow { width: 78px; }
.calc-table .calc-out {
  font-family: 'IBM Plex Mono', monospace; font-size: 12.5px; color: var(--text-dark);
  white-space: nowrap;
}
.row-del {
  background: none; border: none; color: var(--radioactive); font-size: 16px;
  cursor: pointer; padding: 0 6px; line-height: 1;
}
.row-del:hover { opacity: 0.7; }

select.cell-in {
  font-family: 'IBM Plex Mono', monospace; font-size: 12.5px; padding: 6px 8px;
  border: 1px solid var(--line-strong); border-radius: 4px; background: #fff; color: var(--text-dark);
  min-width: 130px;
}
.precursor-cell { display: flex; gap: 6px; align-items: center; min-width: 220px; }
.precursor-cell input[type="text"] { flex: 1; min-width: 110px; }
select.insert-el {
  font-family: 'IBM Plex Mono', monospace; font-size: 11px; padding: 6px 6px;
  border: 1px dashed var(--accent); border-radius: 4px; background: var(--panel-2); color: var(--accent);
  max-width: 130px; cursor: pointer;
}

.eq-row { display: flex; align-items: flex-end; gap: 16px; margin: 18px 0 20px; flex-wrap: wrap; }
.eq-side { flex: 1; min-width: 240px; }
.eq-label {
  display: block; font-size: 12px; color: var(--text-dim); margin-bottom: 6px;
  font-family: 'IBM Plex Mono', monospace;
}
.eq-hint { color: var(--text-faint); font-weight: 400; }
.eq-input-wrap { display: flex; gap: 6px; }
.eq-input-wrap input[type="text"] {
  flex: 1; font-family: 'IBM Plex Mono', monospace; font-size: 14px; padding: 10px 12px;
  border: 1px solid var(--line-strong); border-radius: 4px; background: #fff; color: var(--text-dark);
}
.eq-input-wrap input[type="text"]:focus { outline: none; border-color: var(--accent); }
.eq-arrow { font-size: 22px; color: var(--accent); padding-bottom: 10px; }

.pick-btn {
  font-family: 'IBM Plex Mono', monospace; font-size: 13px;
  background: var(--accent); color: #fff; border: none; border-radius: 4px;
  width: 36px; height: 36px; cursor: pointer; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  transition: transform .12s;
}
.pick-btn:hover { transform: scale(1.08); }

.step-badge {
  display: inline-block; font-family: 'IBM Plex Mono', monospace; font-size: 10px; font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase; color: #fff; background: var(--accent);
  padding: 3px 10px; border-radius: 10px; margin-bottom: 8px;
}
.advanced-toggle {
  display: flex; align-items: center; gap: 6px; margin-top: 22px;
  font-family: 'IBM Plex Mono', monospace; font-size: 12.5px; color: var(--text-dim);
  background: none; border: none; cursor: pointer; padding: 6px 0;
}
.advanced-toggle:hover { color: var(--accent); }

.mini-ptable-overlay {
  display: none; position: fixed; inset: 0; z-index: 100;
  background: rgba(1,57,56,0.45); backdrop-filter: blur(2px);
  align-items: center; justify-content: center; padding: 20px;
}
.mini-ptable-overlay.show { display: flex; }
.mini-ptable-box {
  background: #fff; border-radius: 10px; padding: 20px; max-width: 780px; width: 100%;
  max-height: 90vh; overflow: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.mini-ptable-head {
  display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px;
  font-family: 'IBM Plex Mono', monospace; font-size: 13px; font-weight: 600; color: var(--text-dark);
}
.mini-close {
  background: none; border: none; font-size: 22px; cursor: pointer; color: var(--text-dim); line-height: 1;
}
.mini-close:hover { color: var(--accent); }
.mini-ptable-grid {
  display: grid; grid-template-columns: repeat(18, minmax(0,1fr)); gap: 2px; min-width: 620px;
}
.mini-cell {
  aspect-ratio: 1/1; display: flex; align-items: center; justify-content: center;
  font-family: 'IBM Plex Mono', monospace; font-size: 10px; font-weight: 600;
  border-radius: 2px; cursor: pointer; color: #fff; transition: transform .1s;
}
.mini-cell:hover { transform: scale(1.15); z-index: 2; box-shadow: 0 2px 8px rgba(0,0,0,0.3); }
.mini-block-s { background: var(--s-block); }
.mini-block-p { background: var(--p-block); }
.mini-block-d { background: var(--d-block); }
.mini-block-f { background: var(--f-block); }
.mini-placeholder { background: transparent; border: 1px dashed var(--line-strong); color: var(--text-faint); font-size: 8px; cursor: default; }
.mini-placeholder:hover { transform: none; box-shadow: none; }
.mini-spacer { background: transparent; cursor: default; }
.mini-spacer:hover { transform: none; }
.mini-legend {
  display: flex; gap: 14px; margin-top: 12px; font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; color: var(--text-dim);
}
.mini-legend span { display: flex; align-items: center; gap: 5px; }
.mini-legend i { width: 9px; height: 9px; border-radius: 2px; display: inline-block; }

@media (max-width: 720px) {
  .calc-card { padding: 18px 16px; }
  .calc-tabs { gap: 4px; }
  .calc-tab { padding: 8px 12px; font-size: 11px; }
}