/* ═══════════════════════════════════════════
   DESIGN TOKENS
   ═══════════════════════════════════════════ */
:root {
  --bg-primary: #0a1a0f;
  --bg-secondary: #0f251a;
  --bg-card: rgba(16, 42, 28, 0.85);
  --bg-card-hover: rgba(20, 52, 35, 0.9);
  --bg-glass: rgba(255, 255, 255, 0.08);
  --bg-glass-border: rgba(255, 255, 255, 0.15);

  --green-50: #f0fdf4;
  --green-100: #dcfce7;
  --green-200: #bbf7d0;
  --green-300: #86efac;
  --green-400: #4ade80;
  --green-500: #22c55e;
  --green-600: #16a34a;
  --green-700: #15803d;
  --green-800: #166534;
  --green-900: #14532d;

  --amber-400: #fbbf24;
  --amber-500: #f59e0b;

  --text-primary: #ffffff;
  --text-secondary: #e2e8f0;
  --text-muted: #94a3b8;

  --accent-gradient: linear-gradient(
    135deg,
    #22c55e 0%,
    #16a34a 50%,
    #0d9488 100%
  );
  --glow-green: 0 0 30px rgba(34, 197, 94, 0.15);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --font: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ═══════════════════════════════════════════
   RESET & BASE
   ═══════════════════════════════════════════ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Animated background gradient */
body::before {
  content: "";
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(
      circle at 30% 20%,
      rgba(34, 197, 94, 0.06) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 70% 80%,
      rgba(13, 148, 136, 0.04) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 50% 50%,
      rgba(22, 163, 74, 0.02) 0%,
      transparent 70%
    );
  z-index: -1;
  animation: bgShift 20s ease-in-out infinite alternate;
}

@keyframes bgShift {
  0% {
    transform: translate(0, 0) rotate(0deg);
  }
  100% {
    transform: translate(-5%, -5%) rotate(3deg);
  }
}

/* ═══════════════════════════════════════════
   LAYOUT
   ═══════════════════════════════════════════ */
.container {
  max-width: 900px;
  width: 92%;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* ═══════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════ */
.header {
  text-align: center;
  padding: 48px 0 40px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: var(--glow-green);
}

.logo-text {
  font-size: 32px;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}

.header h1 {
  font-size: 22px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.header p {
  font-size: 14px;
  color: var(--text-muted);
}

/* ═══════════════════════════════════════════
   CARDS & GLASS UI
   ═══════════════════════════════════════════ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  margin-bottom: 20px;
  transition: border-color 0.3s ease;
}

.card:hover {
  border-color: rgba(34, 197, 94, 0.15);
}

.card-title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--green-400);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-title .icon {
  font-size: 16px;
}

/* ═══════════════════════════════════════════
   SEGMENT ROWS
   ═══════════════════════════════════════════ */
.segments-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.segment {
  display: grid;
  grid-template-columns: 1fr 1fr 140px 100px 44px;
  gap: 10px;
  align-items: end;
  padding: 16px;
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  animation: slideIn 0.3s ease;
  transition: background 0.2s ease;
}

.segment:hover {
  background: rgba(255, 255, 255, 0.06);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.field-group label {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.field-group input,
.field-group select {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 14px;
  padding: 10px 12px;
  transition: all 0.2s ease;
  width: 100%;
}

.field-group input:focus,
.field-group select:focus {
  outline: none;
  border-color: var(--green-500);
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.1);
}

.field-group input::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}

.field-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%235e8a72' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

.field-group select option {
  background: #0f251a;
  color: var(--text-primary);
}

.btn-remove {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-sm);
  color: #f87171;
  cursor: pointer;
  font-size: 18px;
  height: 42px;
  width: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  align-self: end;
}

.btn-remove:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.4);
}

.btn-add {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  margin-top: 12px;
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  padding: 1px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: var(--font);
}

.border-gradient-bottom {
  position: absolute;
  width: 300%;
  height: 50%;
  opacity: 0.7;
  bottom: -12px;
  right: -250%;
  border-radius: 50%;
  animation: star-movement-bottom 5s linear infinite alternate;
  z-index: 0;
  background: radial-gradient(circle, cyan, transparent 10%);
}

.border-gradient-top {
  position: absolute;
  opacity: 0.7;
  width: 300%;
  height: 50%;
  top: -12px;
  left: -250%;
  border-radius: 50%;
  animation: star-movement-top 5s linear infinite alternate;
  z-index: 0;
  background: radial-gradient(circle, cyan, transparent 10%);
}

.btn-add-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 13px;
  background: var(--bg-secondary);
  border: 1px dashed rgba(34, 197, 94, 0.3);
  border-radius: calc(var(--radius-md) - 1px);
  color: var(--green-400);
  font-size: 14px;
  font-weight: 500;
  z-index: 1;
  transition: all 0.2s ease;
  position: relative;
}

.btn-add:hover .btn-add-inner {
  background: rgba(20, 52, 35, 1);
  border-color: rgba(34, 197, 94, 0.5);
}

@keyframes star-movement-bottom {
  0% { transform: translate(0%, 0%); opacity: 1; }
  100% { transform: translate(-100%, 0%); opacity: 0; }
}

@keyframes star-movement-top {
  0% { transform: translate(0%, 0%); opacity: 1; }
  100% { transform: translate(100%, 0%); opacity: 0; }
}

/* ═══════════════════════════════════════════
   RESULTS PANEL
   ═══════════════════════════════════════════ */
.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.results-breakdown {
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  padding: 16px 16px 12px;
  margin-bottom: 18px;
}

.results-breakdown-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 10px;
}

.results-breakdown-table {
  width: 100%;
  border-collapse: collapse;
}

.results-breakdown-table td {
  padding: 10px 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 13px;
  color: var(--text-secondary);
}

.results-breakdown-table tr:first-child td {
  border-top: none;
}

.results-breakdown-table td.val {
  text-align: right;
  font-weight: 600;
  color: var(--text-primary);
}

.results-breakdown-table tr.total td {
  padding-top: 12px;
  border-top: 1px solid rgba(34, 197, 94, 0.22);
}

.results-breakdown-table tr.total td.val {
  color: var(--green-300);
}

.methodology-panel {
  margin-top: 18px;
  border-top: 1px solid var(--bg-glass-border);
  padding-top: 18px;
}

.methodology-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  cursor: pointer;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease;
}

.methodology-toggle:hover {
  background: rgba(34, 197, 94, 0.08);
  border-color: rgba(34, 197, 94, 0.25);
  transform: translateY(-1px);
}

.methodology-toggle .chev {
  font-size: 14px;
  color: var(--text-muted);
  transition: transform 0.2s ease;
}

.methodology-toggle[aria-expanded="true"] .chev {
  transform: rotate(180deg);
}

.methodology-content {
  margin-top: 10px;
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 16px;
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.28s ease;
}

.methodology-section + .methodology-section {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.methodology-section h3 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.methodology-block {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.65;
}

.methodology-block .kicker {
  color: var(--text-muted);
  font-size: 11px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-top: 10px;
}

.methodology-block .formula {
  margin-top: 6px;
  padding: 10px 12px;
  background: rgba(34, 197, 94, 0.06);
  border: 1px solid rgba(34, 197, 94, 0.18);
  border-radius: var(--radius-sm);
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  color: var(--green-200);
  white-space: normal;
}

.methodology-block ul {
  margin: 8px 0 0 16px;
}

.methodology-block li {
  margin: 6px 0;
}

.methodology-block code {
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 11px;
  color: var(--green-300);
}

.methodology-block .source {
  margin-top: 10px;
  color: var(--text-muted);
}

.result-tile {
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  transition: all 0.3s ease;
}

.result-tile.highlight {
  background: rgba(34, 197, 94, 0.08);
  border-color: rgba(34, 197, 94, 0.2);
  box-shadow: var(--glow-green);
}

.result-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.result-value {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
}

.result-value.green {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.result-unit {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* ═══════════════════════════════════════════
   OFFSET SLIDER
   ═══════════════════════════════════════════ */
.offset-section {
  margin-top: 8px;
}

.offset-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
}

.offset-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
}

.offset-value {
  font-size: 28px;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.slider-container {
  position: relative;
  margin-bottom: 8px;
}

.slider-track {
  position: relative;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  overflow: visible;
}

.slider-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--accent-gradient);
  border-radius: 4px;
  transition: width 0.1s ease;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  background: transparent;
  position: relative;
  z-index: 2;
  cursor: pointer;
  margin: 0;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--green-400);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 12px rgba(34, 197, 94, 0.4);
  cursor: grab;
  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 0 20px rgba(34, 197, 94, 0.6);
}

input[type="range"]::-webkit-slider-thumb:active {
  cursor: grabbing;
  transform: scale(1.05);
}

input[type="range"]::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--green-400);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 12px rgba(34, 197, 94, 0.4);
  cursor: grab;
}

.slider-wrapper {
  position: relative;
}

.slider-wrapper input[type="range"] {
  position: absolute;
  top: -8px;
  left: 0;
  width: 100%;
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 18px;
  font-size: 11px;
  color: var(--text-muted);
}

.quick-btns {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.quick-btn {
  padding: 8px 16px;
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-radius: 100px;
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.quick-btn:hover {
  background: rgba(34, 197, 94, 0.1);
  border-color: rgba(34, 197, 94, 0.3);
  color: var(--green-300);
}

.quick-btn.active {
  background: rgba(34, 197, 94, 0.15);
  border-color: var(--green-500);
  color: var(--green-300);
}

/* ═══════════════════════════════════════════
   CARBON POSITIVE BADGE
   ═══════════════════════════════════════════ */
.badge-carbon-positive {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  color: var(--green-300);
  margin-top: 8px;
  animation: badgePop 0.3s ease;
}

@keyframes badgePop {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ═══════════════════════════════════════════
   SUMMARY / COPY
   ═══════════════════════════════════════════ */
.summary-section {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--bg-glass-border);
}

.btn-copy {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px;
  background: var(--accent-gradient);
  border: none;
  border-radius: var(--radius-md);
  color: #fff;
  font-family: var(--font);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 20px rgba(34, 197, 94, 0.2);
}

.btn-copy:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 28px rgba(34, 197, 94, 0.3);
}

.btn-copy:active {
  transform: translateY(0);
}

.btn-copy.copied {
  background: rgba(34, 197, 94, 0.15);
  color: var(--green-300);
  box-shadow: none;
}

/* ═══════════════════════════════════════════
   BREAKDOWN TABLE
   ═══════════════════════════════════════════ */
.breakdown-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}

.breakdown-table th {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--bg-glass-border);
}

.breakdown-table td {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 10px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.breakdown-table tr:last-child td {
  border-bottom: none;
}

.breakdown-table .co2-cell {
  font-weight: 600;
  color: var(--text-primary);
  text-align: right;
}

.breakdown-table th:last-child {
  text-align: right;
}

.breakdown-table .formula-cell {
  font-size: 11px;
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  color: var(--green-300);
  white-space: normal;
  word-break: break-word;
}

.formula-line {
  padding: 1px 0;
  display: flex;
  align-items: center;
  gap: 4px;
}

.formula-line::before {
  content: "ƒ";
  font-size: 10px;
  color: var(--green-600);
  font-weight: 700;
  opacity: 0.6;
}

.breakdown-total {
  display: flex;
  justify-content: space-between;
  padding: 12px;
  margin-top: 4px;
  background: rgba(34, 197, 94, 0.06);
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.breakdown-total span:last-child {
  color: var(--green-400);
}

/* ═══════════════════════════════════════════
   CUSTOM PERCENTAGE INPUT
   ═══════════════════════════════════════════ */
.custom-pct-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}

.custom-pct-row label {
  font-size: 13px;
  color: var(--text-muted);
  white-space: nowrap;
}

.custom-pct-input {
  width: 90px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 12px;
  text-align: center;
  transition: border-color 0.2s ease;
}

.custom-pct-input:focus {
  outline: none;
  border-color: var(--green-500);
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.1);
}

/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */

/* Make tables scrollable horizontally without breaking layout */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-bottom: 12px;
}

.breakdown-table {
  min-width: 600px; /* Forces scrolling on small screens */
}

/* Tablets (1024px) */
@media (max-width: 1024px) {
  .container {
    padding: 24px 20px 60px;
  }
}

/* Media queries for 768px and 480px are consolidated later in the file; this duplicate block has been removed for maintainability. */

/* ═══════════════════════════════════════════
   LIGHT PILLAR BACKGROUND
   ═══════════════════════════════════════════ */
.footer {
  text-align: center;
  padding: 32px 0;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.8;
}

.footer a {
  color: var(--green-400);
  text-decoration: none;
}

.methodology {
  margin-top: 12px;
  padding: 20px;
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  text-align: left;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.7;
}

.methodology summary {
  cursor: pointer;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 8px;
}

/* ═══════════════════════════════════════════
   TREE VISUALIZATION
   ═══════════════════════════════════════════ */
.trees-visual {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 12px;
  justify-content: center;
}

.tree-icon {
  font-size: 18px;
  animation: treeGrow 0.3s ease backwards;
  filter: saturate(1.2);
}

@keyframes treeGrow {
  from {
    opacity: 0;
    transform: scale(0);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */

/* ── Large desktops / ultrawide ── */
@media (min-width: 1400px) {
  .container {
    max-width: 1020px;
  }

  .results-grid {
    gap: 24px;
  }

  .segment {
    grid-template-columns: 1fr 1fr 160px 110px 44px;
  }
}

/* ── Tablets (landscape) ── */
@media (max-width: 900px) {
  .breakdown-table th:nth-child(4),
  .breakdown-table td.formula-cell {
    font-size: 10px;
  }
}

/* ── Tablets (portrait) & small laptops ── */
@media (max-width: 768px) {
  .container {
    width: 96%;
    padding: 16px 14px 40px;
  }

  .header {
    padding: 32px 0 28px;
  }

  .header h1 {
    font-size: 19px;
  }

  .logo-text {
    font-size: 28px;
  }

  .card {
    padding: 20px;
  }

  /* Segments: 2-column layout */
  .segment {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .segment .field-group:nth-child(3) {
    grid-column: 1;
  }

  .segment .field-group:nth-child(4) {
    grid-column: 2;
  }

  .btn-add-inner,
  .btn-remove {
    min-height: 44px;
  }

  .btn-remove {
    grid-column: 1 / -1;
    width: 100%;
    height: 36px;
  }

  .field-group input,
  .field-group select {
    min-height: 44px;
  }

  /* Results: single column */
  .results-grid {
    grid-template-columns: 1fr;
  }

  .quick-btns {
    justify-content: center;
  }

  .result-value {
    font-size: 28px;
  }

  /* Disable horizontal table scroll for stacked cards on small screens */
  .table-responsive {
    overflow-x: visible;
  }

  .breakdown-table {
    min-width: 0;
  }

  /* Breakdown table → stacked cards */
  .breakdown-table thead {
    display: none;
  }

  .breakdown-table tr {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .breakdown-table tr:last-child {
    border-bottom: none;
  }

  .breakdown-table td {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 2px 12px;
    border-bottom: none;
  }

  .breakdown-table td::before {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    min-width: 80px;
    flex-shrink: 0;
  }

  .breakdown-table td:nth-child(1)::before { content: "Segment"; }
  .breakdown-table td:nth-child(2)::before { content: "Type"; }
  .breakdown-table td:nth-child(3)::before { content: "Distance"; }
  .breakdown-table td:nth-child(4)::before { content: "Formula"; }
  .breakdown-table td:nth-child(5)::before { content: "CO₂e"; }

  .breakdown-table .co2-cell {
    text-align: left;
    font-size: 14px;
    color: var(--green-300);
  }

  .breakdown-table .formula-cell {
    flex-direction: column;
    align-items: flex-start;
  }

  /* Quick buttons smaller */
  .quick-btn {
    padding: 6px 12px;
    font-size: 12px;
  }

  /* Methodology formulas wrap */
  .methodology-block .formula {
    font-size: 11px;
    word-break: break-word;
  }

  /* Settings modal */
  .modal-content {
    max-height: 85vh;
    overflow-y: auto;
    width: 94%;
  }
}

/* ── Large phones / small tablets ── */
@media (max-width: 600px) {
  .offset-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .offset-value {
    font-size: 24px;
  }

  .slider-labels {
    font-size: 10px;
  }

  .results-breakdown-table td {
    padding: 8px 6px;
    font-size: 12px;
  }
}

/* ── Phones ── */
@media (max-width: 480px) {
  .container {
    width: 100%;
    padding: 12px 10px 32px;
  }

  .header {
    padding: 24px 0 20px;
  }

  .header h1 {
    font-size: 16px;
  }

  .header p {
    font-size: 12px;
  }

  .logo-text {
    font-size: 24px;
  }

  .logo-icon {
    width: 40px;
    height: 40px;
    font-size: 20px;
  }

  .card {
    padding: 16px;
    border-radius: var(--radius-md);
  }

  .card-title {
    font-size: 12px;
    letter-spacing: 1px;
  }

  /* Segments: single column */
  .segment {
    grid-template-columns: 1fr;
    padding: 12px;
  }

  .segment .field-group:nth-child(3),
  .segment .field-group:nth-child(4) {
    grid-column: 1;
  }

  .field-group input,
  .field-group select {
    font-size: 13px;
    padding: 9px 10px;
  }

  .result-value {
    font-size: 24px;
  }

  .result-label {
    font-size: 11px;
  }

  .result-unit {
    font-size: 12px;
  }

  .btn-copy {
    font-size: 13px;
    padding: 12px;
  }

  /* Custom percentage: stack vertically */
  .custom-pct-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .custom-pct-input {
    width: 100%;
  }

  /* Quick buttons fill width */
  .quick-btns {
    gap: 6px;
  }

  .quick-btn {
    flex: 1 1 auto;
    text-align: center;
    padding: 6px 8px;
    font-size: 11px;
  }

  /* Methodology panel */
  .methodology-content {
    padding: 12px;
  }

  .methodology-block .formula {
    font-size: 10px;
    padding: 8px 10px;
  }

  .methodology-block ul {
    margin-left: 12px;
  }

  .methodology-block li {
    font-size: 11px;
  }

  /* Modal */
  .modal-content {
    padding: 18px;
    max-height: 80vh;
    overflow-y: auto;
  }

  .modal-header h2 {
    font-size: 15px;
  }

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

/* ── Very small phones (320–360px) ── */
@media (max-width: 360px) {
  .container {
    padding: 8px 6px 24px;
  }

  .card {
    padding: 12px;
  }

  .header h1 {
    font-size: 14px;
  }

  .logo-text {
    font-size: 20px;
  }

  .logo-icon {
    width: 36px;
    height: 36px;
    font-size: 18px;
  }

  .result-value {
    font-size: 20px;
  }

  .offset-value {
    font-size: 20px;
  }

  .breakdown-total {
    flex-direction: column;
    gap: 4px;
    text-align: center;
  }

  .quick-btn {
    font-size: 10px;
    padding: 8px 10px;
    min-width: 44px;
    min-height: 44px;
    line-height: 1.2;
  }

  .btn-add-inner {
    font-size: 13px;
    padding: 10px;
    min-height: 44px;
  }

  .btn-copy {
    font-size: 12px;
    padding: 10px;
  }

  .trees-visual {
    gap: 2px;
  }

  .tree-icon {
    font-size: 14px;
  }
}

/* ═══════════════════════════════════════════
   LIGHT PILLAR BACKGROUND
   ═══════════════════════════════════════════ */
.light-pillar-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.light-pillar-container {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

.light-pillar-fallback {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(0, 0, 0, 0.1);
  color: #888;
  font-size: 14px;
}

.container {
  position: relative;
  z-index: 1;
}
  
/* ═══════════════════════════════════════════
   AUTOCOMPLETE
   ═══════════════════════════════════════════ */
.autocomplete-wrapper {
  position: relative;
  width: 100%;
}

.autocomplete-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
  z-index: 10;
  max-height: 200px;
  overflow-y: auto;
  display: none;
}

.autocomplete-dropdown.active {
  display: block;
}

.autocomplete-item {
  padding: 10px 12px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text-primary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: background 0.2s ease;
  display: flex;
  flex-direction: column;
}

.autocomplete-item:last-child {
  border-bottom: none;
}

.autocomplete-item:hover,
.autocomplete-item.selected {
  background: rgba(34, 197, 94, 0.15);
}

.autocomplete-item .item-main {
  font-weight: 500;
}

.autocomplete-item .item-sub {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ═══════════════════════════════════════════
   DISTANCE BADGE
   Simple pill shown below segment inputs.
   Only shows the km number — names are
   already visible in the input fields.
   ═══════════════════════════════════════════ */
.distance-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-basis: 100%;
  width: fit-content;
  padding: 5px 12px;
  margin-top: 6px;
  background: linear-gradient(135deg, rgba(34,197,94,0.12), rgba(34,197,94,0.06));
  border: 1px solid rgba(34, 197, 94, 0.25);
  border-radius: 100px;
  animation: distanceFadeIn 0.3s ease;
  white-space: nowrap;
}

@keyframes distanceFadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.distance-icon { font-size: 13px; line-height: 1; flex-shrink: 0; }

.distance-value {
  font-size: 14px;
  font-weight: 800;
  color: var(--green-400);
  letter-spacing: 0.3px;
  flex-shrink: 0;
}

.distance-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  flex-shrink: 0;
}

/* ═══════════════════════════════════════════
   ADMIN SETTINGS MODAL
   ═══════════════════════════════════════════ */
.btn-settings {
  margin-top: 16px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-settings:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 24px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.modal-header h2 {
  font-size: 18px;
  color: var(--text-primary);
  font-weight: 600;
}

.btn-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
  transition: color 0.2s ease;
}

.btn-close:hover {
  color: var(--text-primary);
}

.btn-close:focus-visible,
.btn-reset:focus-visible,
.btn-save:focus-visible {
  outline: 3px solid rgba(34, 197, 94, 0.9);
  outline-offset: 3px;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.35);
}

.modal-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.settings-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.settings-group label {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.settings-group input {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 8px 12px;
  font-size: 14px;
  font-family: var(--font);
  transition: all 0.2s ease;
}

.settings-group input:focus {
  outline: none;
  border-color: var(--green-500);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  border-top: 1px solid var(--bg-glass-border);
  padding-top: 20px;
}

.btn-reset {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-muted);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font);
  font-weight: 500;
}

.btn-reset:hover {
  background: rgba(255, 255, 255, 0.05);
}

.btn-save {
  background: var(--accent-gradient);
  border: none;
  color: white;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font);
  font-weight: 600;
}

.btn-save:hover {
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.3);
}