:root {
  --bg-base: #0a0a0b;
  --bg: #0a0a0b;
  --bg-surface: rgba(255, 255, 255, 0.02);
  --bg-card: rgba(255, 255, 255, 0.025);
  --bg-card-hover: rgba(255, 255, 255, 0.05);
  --border-subtle: rgba(255, 255, 255, 0.075);
  --border-hover: rgba(255, 255, 255, 0.18);
  --text-primary: #ececee;
  --text-secondary: #8a8f98;
  --text-muted: rgba(138, 143, 152, 0.65);
  --accent-blue: #3b63ff;
  --grid-line: rgba(255, 255, 255, 0.025);
  --ring-top: rgba(255, 255, 255, 0.09);
  --ring-right: rgba(255, 255, 255, 0.04);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
  --card: rgba(255, 255, 255, 0.025);
  --card-h: rgba(255, 255, 255, 0.05);
  --bd: rgba(255, 255, 255, 0.075);
  --bd-h: rgba(255, 255, 255, 0.18);
  --tx: #ececee;
  --tx2: #8a8f98;
  --ac: #3b63ff;
  --green: #22c55e;
  --amber: #f59e0b;
  --red: #ef4444;
  --panel: #11131b;
  --line: rgba(255, 255, 255, 0.05);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-base);
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: #0a0a0b;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 99px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(59, 99, 255, 0.5);
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font);
  background-color: var(--bg-base);
  color: var(--text-primary);
  overflow-x: hidden;
  overflow-y: auto;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 60px 60px;
  background-position: center top;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Grid kenarlarini yumusatir (Arvasin.com kurumsal standardi) */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 35%, var(--bg-base) 82%);
  pointer-events: none;
  z-index: 0;
}

/* Arvasin.com Ortalanmis Arka Plan Isik Hüzmeleri */
.glow {
  position: fixed;
  width: 700px;
  height: 500px;
  background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.035) 0%, transparent 55%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -55%);
  z-index: 0;
  pointer-events: none;
}

.glow-accent {
  position: fixed;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle at center, rgba(59, 99, 255, 0.035) 0%, transparent 70%);
  top: 35%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 0;
  pointer-events: none;
}

.mono {
  font-family: var(--mono);
}

a {
  color: inherit;
  text-decoration: none;
}

/* Top Sticky Navigation Bar */
.top-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(10, 10, 11, 0.75);
  border-bottom: 1px solid var(--bd);
}

.top-nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand-mini {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 14.5px;
  color: var(--tx);
  letter-spacing: -0.2px;
}

.brand-mini img {
  display: block;
}

.nav-links {
  display: flex;
  gap: 22px;
  font-size: 13.5px;
  color: var(--tx2);
}

.nav-links a {
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--tx);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-pills {
  display: flex;
  gap: 2px;
  border: 1px solid var(--bd);
  border-radius: 8px;
  padding: 2px;
  background: rgba(255, 255, 255, 0.02);
}

.lang-pills a {
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 6px;
  color: var(--tx2);
  transition: all 0.2s ease;
}

.lang-pills a:hover,
.lang-pills a.active {
  color: var(--tx);
  background: rgba(255, 255, 255, 0.08);
}

.mobile-header-actions {
  display: none;
  align-items: center;
  gap: 8px;
}

.mobile-lang-trigger {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 9px;
  border-radius: 6px;
  border: 1px solid var(--bd);
  background: rgba(255, 255, 255, 0.04);
  color: var(--tx);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
}

.mobile-menu-btn {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 36px;
  height: 36px;
  padding: 8px;
  border-radius: 8px;
  border: 1px solid var(--bd);
  background: rgba(255, 255, 255, 0.04);
  color: var(--tx);
  cursor: pointer;
  transition: all 0.25s ease;
}

.hamburger-bar {
  width: 16px;
  height: 1.5px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.mobile-menu-btn.active .hamburger-bar:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.mobile-menu-btn.active .hamburger-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.mobile-menu-btn.active .hamburger-bar:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

.mobile-drawer {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(10, 10, 11, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--bd);
  padding: 16px 20px 24px;
  flex-direction: column;
  gap: 16px;
}

.mobile-drawer.open {
  display: flex;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mobile-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--tx2);
  font-size: 13.5px;
  transition: background 0.2s, color 0.2s;
}

.mobile-nav-item:hover,
.mobile-nav-item:active {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
}

.mobile-drawer-divider {
  height: 1px;
  background: var(--line);
}

.mobile-drawer-lang-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mobile-drawer-lang-title {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--tx2);
}

.mobile-lang-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.mobile-lang-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 8px 6px;
  border-radius: 8px;
  border: 1px solid var(--bd);
  background: rgba(255, 255, 255, 0.02);
  color: var(--tx2);
  transition: all 0.2s ease;
  gap: 2px;
}

.mobile-lang-chip strong {
  font-size: 12px;
  font-weight: 600;
  color: var(--tx);
}

.mobile-lang-chip span {
  font-size: 10px;
  color: var(--tx2);
}

.mobile-lang-chip:hover {
  border-color: var(--bd-h);
  background: rgba(255, 255, 255, 0.05);
}

.mobile-lang-chip.active {
  border-color: rgba(59, 99, 255, 0.5);
  background: rgba(59, 99, 255, 0.12);
}

.mobile-lang-chip.active strong {
  color: #93c5fd;
}

/* Page Layout & Container */
.calc-wrapper {
  position: relative;
  z-index: 10;
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 24px 80px;
  display: flex;
  flex-direction: column;
  gap: 36px;
}

/* Hero Section */
.hero-screen {
  text-align: center;
  padding: 24px 0 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.logo-ring {
  position: relative;
  width: 88px;
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.logo-ring::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid transparent;
  border-top-color: rgba(255, 255, 255, 0.12);
  border-right-color: rgba(59, 99, 255, 0.4);
  animation: spin 14s linear infinite;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

.hero-logo {
  display: block;
  width: 52px;
  height: 52px;
  filter: drop-shadow(0 0 24px rgba(59, 99, 255, 0.3));
}

.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ac);
  background: rgba(59, 99, 255, 0.1);
  border: 1px solid rgba(59, 99, 255, 0.28);
  padding: 3px 10px;
  border-radius: 99px;
  margin-bottom: 14px;
}

.hero-title {
  font-size: clamp(28px, 4.5vw, 40px);
  font-weight: 700;
  letter-spacing: -0.8px;
  color: #ffffff;
  margin-bottom: 12px;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 15px;
  color: var(--tx2);
  line-height: 1.6;
  max-width: 640px;
}

/* Calculator Container & Panels */
.calc-container {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: relative;
}

.panel {
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: 18px;
  padding: 24px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}

.inputs-panel {
  position: relative;
  z-index: 40;
}

.results-panel {
  position: relative;
  z-index: 1;
}

.panel:hover {
  border-color: var(--bd-h);
}

.panel-head {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 20px;
}

.panel-tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ac);
}

.panel-title {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.3px;
  color: #ffffff;
}

/* =========================================================
   3D PRINTER HARDWARE STATION (EYE-CATCHING AUTO-SYNC)
   ========================================================= */
.printer-station {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: linear-gradient(180deg, rgba(59, 99, 255, 0.08) 0%, rgba(255, 255, 255, 0.02) 100%);
  border: 1px solid rgba(59, 99, 255, 0.32);
  border-radius: 14px;
  padding: 18px 20px;
  margin-bottom: 20px;
  position: relative;
  z-index: 30;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25), 0 0 20px rgba(59, 99, 255, 0.08);
}

.printer-station-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.station-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.station-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #86efac;
  background: rgba(34, 197, 94, 0.14);
  border: 1px solid rgba(34, 197, 94, 0.32);
  padding: 3px 8px;
  border-radius: 6px;
  text-transform: uppercase;
}

.station-label {
  font-size: 14px;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: -0.2px;
}

.printer-quick-chips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.printer-chip {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--bd);
  border-radius: 99px;
  padding: 5px 12px;
  color: var(--tx2);
  font-size: 12px;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.printer-chip:hover {
  background: rgba(59, 99, 255, 0.16);
  border-color: rgba(59, 99, 255, 0.4);
  color: #fff;
}

.printer-chip.active {
  background: rgba(59, 99, 255, 0.26);
  border-color: rgba(59, 99, 255, 0.65);
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 0 14px rgba(59, 99, 255, 0.3);
}

.printer-main-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: center;
}

.printer-cbox-group {
  position: relative;
  z-index: 35;
}

.tag-printer {
  background: rgba(59, 99, 255, 0.24);
  color: #93b4ff;
  border-color: rgba(59, 99, 255, 0.45);
}

.hardware-sync-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 10px 14px;
}

.sync-dot-wrap {
  position: relative;
  width: 10px;
  height: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sync-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.7);
  animation: pulseSync 2.5s infinite;
}

@keyframes pulseSync {
  0% {
    box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.7);
  }
  70% {
    box-shadow: 0 0 0 6px rgba(34, 197, 94, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(34, 197, 94, 0);
  }
}

.sync-text-wrap {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.sync-lbl {
  font-size: 10.5px;
  font-weight: 600;
  color: var(--tx2);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.sync-val {
  font-size: 12px;
  color: #86efac;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* =========================================================
   SEARCHABLE COMBOBOX COMPONENT (ARVASIN TECH DESIGN)
   ========================================================= */
.cbox-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  position: relative;
}

.cbox-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
  position: relative;
  z-index: 1;
}

/* Natural stacking: Top row above bottom row */
.cbox-group:nth-child(1),
.cbox-group:nth-child(2) {
  z-index: 10;
}

.cbox-group:nth-child(3),
.cbox-group:nth-child(4) {
  z-index: 5;
}

/* Active open combobox is always on the highest layer */
.cbox-group.is-open,
.cbox-group:has(.cbox.open),
.cbox-group:focus-within {
  z-index: 50 !important;
}

.cbox-label {
  font-size: 12px;
  color: var(--tx2);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 500;
}

.cbox {
  position: relative;
  width: 100%;
}

.cbox.open {
  z-index: 60 !important;
}

.cbox-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--bd);
  border-radius: 12px;
  padding: 10px 14px;
  color: var(--tx);
  font-family: inherit;
  font-size: 14px;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.cbox-trigger:hover {
  border-color: var(--bd-h);
  background: rgba(255, 255, 255, 0.07);
}

.cbox.open .cbox-trigger,
.cbox-trigger:focus {
  border-color: rgba(59, 99, 255, 0.6);
  background: rgba(59, 99, 255, 0.06);
  box-shadow: 0 0 0 1px rgba(59, 99, 255, 0.4), 0 4px 18px rgba(59, 99, 255, 0.18);
  outline: none;
}

.cbox-val {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.cbox-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 6px;
  letter-spacing: 0.03em;
  background: rgba(59, 99, 255, 0.18);
  color: #93b4ff;
  border: 1px solid rgba(59, 99, 255, 0.35);
  white-space: nowrap;
  flex-shrink: 0;
}

.tag-mat {
  background: rgba(59, 99, 255, 0.18);
  color: #93b4ff;
  border-color: rgba(59, 99, 255, 0.35);
}

.tag-brand {
  background: rgba(34, 197, 94, 0.16);
  color: #86efac;
  border-color: rgba(34, 197, 94, 0.32);
}

.tag-nozzle {
  background: rgba(245, 158, 11, 0.16);
  color: #fcd34d;
  border-color: rgba(245, 158, 11, 0.32);
}

.tag-extruder {
  background: rgba(168, 85, 247, 0.16);
  color: #d8b4fe;
  border-color: rgba(168, 85, 247, 0.32);
}

.cbox-text {
  font-weight: 600;
  color: #fff;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cbox-sub {
  font-size: 11.5px;
  color: var(--tx2);
  white-space: nowrap;
  margin-left: auto;
  padding-right: 6px;
}

.cbox-arrow {
  color: var(--tx2);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.cbox.open .cbox-arrow {
  transform: rotate(180deg);
  color: #7c9bff;
}

.cbox-popover {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: #0d1019;
  border: 1px solid rgba(59, 99, 255, 0.45);
  border-radius: 14px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.95), 0 0 32px rgba(59, 99, 255, 0.22);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  z-index: 999;
  overflow: hidden;
  display: none;
}

.cbox.open .cbox-popover {
  display: block;
  animation: cboxPop 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes cboxPop {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.cbox-search {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--bd);
  background: #080a11;
}

.search-ico {
  color: var(--tx2);
  flex-shrink: 0;
}

.cbox-input {
  background: transparent;
  border: 0;
  outline: none;
  color: #fff;
  font-size: 13px;
  font-family: inherit;
  width: 100%;
}

.cbox-input::placeholder {
  color: rgba(138, 143, 152, 0.55);
}

.cbox-list {
  max-height: 260px;
  overflow-y: auto;
  padding: 6px;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: rgba(59, 99, 255, 0.28) transparent;
}

.cbox-list::-webkit-scrollbar {
  width: 6px;
}

.cbox-list::-webkit-scrollbar-thumb {
  background: rgba(59, 99, 255, 0.3);
  border-radius: 4px;
}

.cbox-list::-webkit-scrollbar-thumb:hover {
  background: rgba(59, 99, 255, 0.6);
}

.cbox-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 12px;
  border-radius: 9px;
  cursor: pointer;
  transition: all 0.12s ease;
  font-size: 13px;
  border: 1px solid transparent;
}

.cbox-item:hover {
  background: rgba(59, 99, 255, 0.16);
  color: #fff;
  border-color: rgba(59, 99, 255, 0.25);
}

.cbox-item.selected {
  background: rgba(59, 99, 255, 0.24);
  border-color: rgba(59, 99, 255, 0.45);
  color: #fff;
}

.cbox-item-left {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.cbox-tag {
  white-space: nowrap;
  font-size: 10px;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 4px;
  letter-spacing: 0.02em;
  background: rgba(255, 255, 255, 0.06);
  color: var(--tx2);
  border: 1px solid rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
}

.cbox-item-title {
  font-weight: 500;
  color: var(--tx);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cbox-item.selected .cbox-item-title {
  color: #fff;
  font-weight: 600;
}

.cbox-item-meta {
  font-size: 11px;
  color: var(--tx2);
  white-space: nowrap;
  flex-shrink: 0;
}

/* Custom Nozzle Manual Input Box */
.custom-nozzle-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: rgba(245, 158, 11, 0.08);
  border: 1px dashed rgba(245, 158, 11, 0.35);
  border-radius: 10px;
  padding: 8px 12px;
  margin-top: 6px;
  animation: cboxPop 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.custom-nozzle-lbl {
  font-size: 11.5px;
  font-weight: 600;
  color: #fcd34d;
}

.custom-nozzle-input-box {
  display: flex;
  align-items: center;
  gap: 6px;
}

.custom-nozzle-field {
  width: 72px;
  background: #080a11;
  border: 1px solid rgba(245, 158, 11, 0.4);
  border-radius: 6px;
  padding: 5px 8px;
  font-size: 13px;
  font-family: var(--mono);
  font-weight: 700;
  color: #ffffff;
  outline: none;
  text-align: center;
  transition: all 0.2s ease;
}

.custom-nozzle-field:focus {
  border-color: #f59e0b;
  box-shadow: 0 0 10px rgba(245, 158, 11, 0.35);
}

.custom-nozzle-unit {
  font-size: 12px;
  color: var(--tx2);
  font-weight: 600;
}

/* =========================================================
   RESULTS PANEL (LIVE CALCULATED SETTINGS)
   ========================================================= */
.results-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
  border-color: rgba(59, 99, 255, 0.2);
}

.results-header-bar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.results-summary {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.results-badge {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ac);
}

.results-heading {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.3px;
  color: #ffffff;
}

.summary-pills-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
}

.summary-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 500;
  color: #93b4ff;
  background: rgba(59, 99, 255, 0.1);
  border: 1px solid rgba(59, 99, 255, 0.25);
  padding: 4px 12px;
  border-radius: 99px;
  width: fit-content;
}

.source-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: #86efac;
  background: rgba(34, 197, 94, 0.08);
  border: 1px solid rgba(34, 197, 94, 0.25);
  padding: 4px 12px;
  border-radius: 99px;
  width: fit-content;
}

.source-pill svg {
  color: #22c55e;
  flex-shrink: 0;
}

.source-pill-lbl {
  color: #8a8f98;
  font-size: 11px;
}

.source-pill-val {
  color: #86efac;
  font-weight: 600;
}

/* 6 Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.metric-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--bd);
  border-radius: 14px;
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.2s ease;
}

.metric-card:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--bd-h);
  transform: translateY(-1px);
}

.metric-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.metric-tag {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ac);
}

.metric-icon {
  color: var(--tx2);
  opacity: 0.8;
}

.metric-main-val {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.6px;
  color: #ffffff;
  line-height: 1.15;
  margin-bottom: 14px;
  font-feature-settings: "tnum";
}

.metric-main-val small {
  font-size: 15px;
  font-weight: 500;
  color: var(--tx2);
  margin-left: 3px;
}

.metric-breakdown {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12.5px;
}

.m-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--tx2);
  padding-bottom: 4px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.06);
}

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

.m-row strong {
  color: var(--tx);
  font-weight: 600;
  font-family: var(--mono);
  font-size: 12px;
}

/* Metric 7: Mechanical & Thermal Properties (TDS) Wide Card */
.metric-card-tds {
  grid-column: 1 / -1;
  background: linear-gradient(180deg, rgba(59, 99, 255, 0.04) 0%, rgba(255, 255, 255, 0.02) 100%);
  border-color: rgba(59, 99, 255, 0.22);
  padding: 22px 24px;
}

.metric-tds-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.tds-doc-pill {
  font-size: 11px;
  font-weight: 600;
  color: #93b4ff;
  background: rgba(59, 99, 255, 0.12);
  border: 1px solid rgba(59, 99, 255, 0.28);
  padding: 2px 9px;
  border-radius: 6px;
  font-family: var(--mono);
}

.tds-metrics-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 14px;
}

.tds-metric-box {
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.tds-metric-label {
  font-size: 11.5px;
  color: var(--tx2);
  white-space: nowrap;
}

.tds-metric-value {
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  font-family: var(--mono);
}

/* Critical Tip Alert Box */
.tip-box {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: rgba(59, 99, 255, 0.07);
  border: 1px solid rgba(59, 99, 255, 0.28);
  border-radius: 12px;
  padding: 16px 20px;
}

.tip-ico {
  color: #93b4ff;
  flex-shrink: 0;
  margin-top: 2px;
}

.tip-text-wrap {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.tip-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #93b4ff;
}

.tip-text-wrap p {
  font-size: 13.5px;
  color: var(--tx);
  line-height: 1.6;
}

/* Technical Material Description */
.mat-info-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--bd);
  border-radius: 12px;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mat-info-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.mat-info-title {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
}

.mat-info-badge {
  font-size: 11px;
  font-weight: 600;
  color: var(--ac);
  background: rgba(59, 99, 255, 0.12);
  border: 1px solid rgba(59, 99, 255, 0.25);
  padding: 2px 8px;
  border-radius: 6px;
}

.mat-info-desc {
  font-size: 13.5px;
  color: var(--tx2);
  line-height: 1.6;
}

/* =========================================================
   OPEN DATA SOURCES SHOWCASE SECTION
   ========================================================= */
.sources-section {
  display: flex;
  flex-direction: column;
  gap: 32px;
  margin-top: 12px;
}

.sources-subtitle {
  max-width: 680px;
  font-size: 14px;
  color: var(--tx2);
  line-height: 1.6;
  text-align: center;
}

.source-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.source-stat-item {
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: 14px;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.source-stat-item:hover {
  background: var(--card-h);
  border-color: var(--bd-h);
  transform: translateY(-2px);
}

.source-stat-val {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #ffffff;
  font-family: var(--mono);
  background: linear-gradient(135deg, #ffffff 40%, #7c9bff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.source-stat-lbl {
  font-size: 13px;
  color: var(--tx2);
  font-weight: 500;
}

.sources-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.source-card {
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: 14px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all 0.2s ease;
}

.source-card:hover {
  border-color: rgba(59, 99, 255, 0.4);
  background: rgba(255, 255, 255, 0.035);
  transform: translateY(-2px);
}

.source-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(59, 99, 255, 0.12);
  border: 1px solid rgba(59, 99, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #93b4ff;
  margin-bottom: 2px;
}

.source-card-title {
  font-size: 16px;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: -0.2px;
}

.source-card-desc {
  font-size: 13px;
  color: var(--tx2);
  line-height: 1.6;
  flex: 1;
}

.source-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.source-tag {
  font-size: 11px;
  font-weight: 500;
  color: #93b4ff;
  background: rgba(59, 99, 255, 0.08);
  border: 1px solid rgba(59, 99, 255, 0.2);
  padding: 3px 8px;
  border-radius: 6px;
  font-family: var(--mono);
}

/* Troubleshooting / FAQ Section */
.troubleshooting-section {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.section-head {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.section-title {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.4px;
  color: #ffffff;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.faq-box {
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: 14px;
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 0.2s ease;
}

.faq-box:hover {
  border-color: var(--bd-h);
}

.faq-box h4 {
  font-size: 14.5px;
  font-weight: 600;
  color: #ffffff;
  line-height: 1.4;
}

.faq-box p {
  font-size: 13px;
  color: var(--tx2);
  line-height: 1.6;
}

/* Corporate Ecosystem Footer */
.corp-footer {
  position: relative;
  z-index: 10;
  border-top: 1px solid var(--bd);
  padding: 56px 24px 28px;
  background: rgba(10, 10, 11, 0.7);
  margin-top: auto;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  font-size: 13px;
  color: var(--tx2);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 11px;
}

.footer-brand-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--tx);
  font-size: 15px;
  font-weight: 600;
}

.footer-desc {
  line-height: 1.6;
  max-width: 320px;
  font-size: 13px;
  color: var(--tx2);
}

.footer-contact {
  color: rgba(138, 143, 152, 0.7);
  font-size: 12px;
  margin-top: 4px;
}

.footer-heading {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tx);
  margin-bottom: 4px;
}

.footer-col a {
  color: var(--tx2);
  transition: color 0.2s ease;
  font-size: 13px;
}

.footer-col a:hover {
  color: var(--tx);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
}

.footer-copy {
  color: rgba(138, 143, 152, 0.7);
}

.footer-langs {
  display: flex;
  gap: 10px;
}

.footer-langs a {
  color: rgba(138, 143, 152, 0.7);
  font-size: 11px;
  font-weight: 500;
  transition: color 0.2s ease;
}

.footer-langs a:hover {
  color: var(--tx);
}

/* =========================================================
   RESPONSIVE DESIGN BREAKPOINTS
   ========================================================= */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .desktop-only-lang {
    display: none;
  }

  .mobile-header-actions {
    display: inline-flex;
  }

  .printer-main-row {
    grid-template-columns: 1fr;
  }

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

  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .tds-metrics-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .source-stats-grid,
  .sources-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }

  .footer-about {
    grid-column: 1 / -1;
  }
}

@media (max-width: 600px) {
  .calc-wrapper {
    padding: 24px 16px 60px;
    gap: 28px;
  }

  .panel {
    padding: 18px 16px;
  }

  .printer-station {
    padding: 14px 12px;
  }

  .printer-chip {
    padding: 4px 9px;
    font-size: 11px;
  }

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

  .tds-metrics-row {
    grid-template-columns: 1fr;
  }

  .results-header-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-top {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 12px;
  }

  .footer-langs {
    justify-content: center;
  }
}