/* ============================================================
   PLASTWISE — Calculator-specific styles
   Complements assets/style.css (global site styles)
   Design tokens inherited via CSS variables from parent page
   ============================================================ */

/* ============================================================
   SHARED TYPOGRAPHY HELPERS
   (mlabel, btn-primary — scoped to calculator pages)
   ============================================================ */

.mlabel {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-2, #8FA3B8);
}
.mlabel.accent {
  color: var(--orange, #d4731a);
}

.btn-primary {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 14px 28px;
  border-radius: 2px;
  background: var(--orange, #d4731a);
  color: var(--text-1, #F0EDE8);
  text-decoration: none;
  border: 1px solid var(--orange, #d4731a);
  transition: background .2s, border-color .2s;
  display: inline-block;
  cursor: pointer;
}
.btn-primary:hover {
  background: var(--orange-lt, #e8893a);
  border-color: var(--orange-lt, #e8893a);
}

/* ============================================================
   HUB PAGE — TOOLS INDEX
   ============================================================ */

.tools-hero {
  padding: 140px 10% 80px;
  border-bottom: 1px solid var(--border, rgba(255,255,255,0.08));
  position: relative;
  background: var(--bg, #0F1923);
}
.tools-hero .mlabel {
  margin-bottom: 14px;
}
.tools-hero h1 {
  max-width: 700px;
  margin-bottom: 24px;
  font-family: var(--head, 'Montserrat', sans-serif);
  font-weight: 800;
  font-size: clamp(32px, 4.5vw, 56px);
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--text-1, #F0EDE8);
}
.tools-hero p {
  max-width: 600px;
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 19px;
  font-weight: 300;
  line-height: 1.75;
  color: var(--text-2, #8FA3B8);
}

.tools-grid {
  padding: 80px 10%;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border, rgba(255,255,255,0.08));
}

.tool-card {
  background: var(--bg, #0F1923);
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: background .3s;
  cursor: pointer;
  text-decoration: none;
}
.tool-card:hover {
  background: var(--bg-card, #182633);
}
.tool-card-num {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--orange, #d4731a);
}
.tool-card h3 {
  color: var(--text-1, #F0EDE8);
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 22px;
  font-weight: 700;
  margin: 0;
  line-height: 1.2;
}
.tool-card p {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-2, #8FA3B8);
  margin: 0;
}
.tool-card-tags {
  display: flex;
  gap: 8px;
  margin-top: auto;
  padding-top: 16px;
  flex-wrap: wrap;
}
.tool-card-tag {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid var(--border-card, #2A3545);
  color: var(--text-3, rgba(143,163,184,0.45));
  border-radius: 2px;
}
.tool-card-arrow {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange, #d4731a);
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.tool-card-arrow svg {
  width: 14px;
  height: 14px;
  transition: transform .2s;
}
.tool-card:hover .tool-card-arrow svg {
  transform: translateX(4px);
}

/* Category badges */
.tool-category-badge {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 2px;
  background: var(--orange-pale, rgba(212,115,26,0.07));
  border: 1px solid var(--orange-dim, rgba(212,115,26,0.18));
  color: var(--orange, #d4731a);
  display: inline-block;
}
.tool-category-badge.teal {
  background: rgba(42,157,143,0.07);
  border-color: rgba(42,157,143,0.2);
  color: var(--teal, #2A9D8F);
}

/* Hub CTA band */
.tools-cta {
  padding: 80px 10%;
  border-top: 1px solid var(--border, rgba(255,255,255,0.08));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}
.tools-cta-text h3 {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-weight: 700;
  color: var(--text-1, #F0EDE8);
  margin-bottom: 12px;
}
.tools-cta-text p {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 15px;
  font-weight: 300;
  line-height: 1.75;
  color: var(--text-2, #8FA3B8);
  max-width: 500px;
}

/* ============================================================
   CALCULATOR HERO (individual calculator page)
   ============================================================ */

.calculator-hero {
  padding: 120px 10% 60px;
  border-bottom: 1px solid var(--border, rgba(255,255,255,0.08));
  background: var(--bg, #0F1923);
}
.calculator-hero .mlabel {
  margin-bottom: 14px;
}
.calculator-hero h1 {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  max-width: 700px;
  margin-bottom: 20px;
  color: var(--text-1, #F0EDE8);
}
.calculator-hero p {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 17px;
  font-weight: 300;
  line-height: 1.75;
  color: var(--text-2, #8FA3B8);
  max-width: 600px;
}

/* Breadcrumb nav */
.calc-breadcrumb {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3, rgba(143,163,184,0.45));
  margin-bottom: 24px;
}
.calc-breadcrumb a {
  color: var(--text-3, rgba(143,163,184,0.45));
  text-decoration: none;
  transition: color .2s;
}
.calc-breadcrumb a:hover {
  color: var(--text-2, #8FA3B8);
}
.calc-breadcrumb span {
  margin: 0 8px;
  opacity: 0.5;
}

/* ============================================================
   CALCULATOR WORKSPACE — LIGHT BACKGROUND WITH GRID PATTERN
   ============================================================ */

.calculator-workspace {
  background: var(--bg-alt, #E6EAE4);
  background-image: radial-gradient(circle, rgba(0,0,0,0.06) 1px, transparent 1px);
  background-size: 24px 24px;
  padding: 0;
}

/* Main 2-column grid (inputs + results) */
.calc-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--lt-border, rgba(0,0,0,0.08));
}

/* ============================================================
   INPUTS PANEL
   ============================================================ */

.calc-inputs {
  background: var(--lt-card, #F4F6F2);
  padding: 48px 40px;
}
.calc-inputs h4 {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 14px;
  font-weight: 600;
  color: var(--lt-ink, #1A2028);
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.calc-inputs h4::before {
  content: '';
  width: 3px;
  height: 16px;
  background: var(--orange, #d4731a);
  border-radius: 1px;
  flex-shrink: 0;
}

.input-group {
  margin-bottom: 24px;
}

.input-label {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lt-mid, #52616E);
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Wrapper for input + unit inline layout */
.input-wrap {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--lt-card-2, #D8DDD6);
  border-radius: 2px;
  background: #fff;
  transition: border-color .2s;
}
.input-wrap:focus-within {
  border-color: var(--orange, #d4731a);
}

.input-field {
  flex: 1;
  padding: 12px 16px;
  background: transparent;
  border: none;
  color: var(--lt-ink, #1A2028);
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 15px;
  font-weight: 400;
  border-radius: 2px;
  outline: none;
}
.input-field::placeholder {
  color: var(--lt-dim, #8A98A4);
}
/* Standalone input (no .input-wrap) */
.input-field:not(.input-wrap .input-field) {
  width: 100%;
  border: 1px solid var(--lt-card-2, #D8DDD6);
  transition: border-color .2s;
}
.input-field:not(.input-wrap .input-field):focus {
  border-color: var(--orange, #d4731a);
}

.input-unit {
  padding: 12px 16px;
  color: var(--lt-mid, #52616E);
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 11px;
  letter-spacing: 0.08em;
  white-space: nowrap;
  border-left: 1px solid var(--lt-card-2, #D8DDD6);
  display: flex;
  align-items: center;
}

/* Validation states */
.input-field.input-error,
.input-wrap.input-error {
  border-color: #c0392b;
}
.input-error-msg {
  display: block;
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: #c0392b;
  margin-top: 4px;
}

/* Auto-filled state (from material selector) */
.input-field.auto-filled,
.input-wrap.auto-filled {
  background: rgba(42,157,143,0.06);
  border-color: rgba(42,157,143,0.3);
}
.auto-fill-badge {
  display: inline-block;
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 8px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--teal, #2A9D8F);
  color: #fff;
  padding: 2px 6px;
  border-radius: 2px;
  margin-left: 6px;
  vertical-align: middle;
}

.input-divider {
  height: 1px;
  background: var(--lt-card-2, #D8DDD6);
  margin: 32px 0;
}

/* Calculate button */
.calc-btn {
  width: 100%;
  padding: 16px;
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--orange, #d4731a);
  color: #fff;
  border: 1px solid var(--orange, #d4731a);
  border-radius: 2px;
  cursor: pointer;
  transition: background .2s, border-color .2s;
}
.calc-btn:hover {
  background: var(--orange-lt, #e8893a);
  border-color: var(--orange-lt, #e8893a);
}
.calc-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ============================================================
   MATERIAL SELECTOR
   ============================================================ */

.material-select {
  width: 100%;
  padding: 12px 16px;
  background: #fff;
  border: 1px solid var(--lt-card-2, #D8DDD6);
  color: var(--lt-ink, #1A2028);
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 15px;
  font-weight: 400;
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpolyline points='2,4 6,8 10,4' fill='none' stroke='%2352616E' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  transition: border-color .2s;
}
.material-select:focus {
  border-color: var(--orange, #d4731a);
}

/* Material info chip (shown when material selected) */
.material-info {
  display: none;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 12px;
  padding: 12px 16px;
  background: rgba(212,115,26,0.05);
  border: 1px solid rgba(212,115,26,0.15);
  border-radius: 2px;
}
.material-info.visible {
  display: grid;
}
.material-prop {
  text-align: center;
}
.material-prop-label {
  display: block;
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 8px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lt-mid, #52616E);
  margin-bottom: 2px;
}
.material-prop-value {
  display: block;
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 13px;
  color: var(--orange, #d4731a);
  font-weight: 500;
}

/* ============================================================
   RESULTS PANEL
   ============================================================ */

.calc-results {
  background: var(--lt-card-3, #CDD3CF);
  padding: 48px 40px;
  transition: opacity .3s;
}
.calc-results.empty {
  opacity: 0.6;
}
.calc-results h4 {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 14px;
  font-weight: 600;
  color: var(--lt-ink, #1A2028);
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.calc-results h4::before {
  content: '';
  width: 3px;
  height: 16px;
  background: var(--teal, #2A9D8F);
  border-radius: 1px;
  flex-shrink: 0;
}

/* Empty / placeholder state */
.result-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  color: var(--lt-mid, #52616E);
  text-align: center;
}
.result-placeholder svg {
  margin-bottom: 16px;
  opacity: 0.3;
}
.result-placeholder p {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 14px;
  line-height: 1.6;
  color: var(--lt-mid, #52616E);
}

/* Main result value */
.result-main {
  padding: 32px;
  background: #fff;
  border: 1px solid var(--lt-card-2, #D8DDD6);
  border-radius: 2px;
  margin-bottom: 24px;
  text-align: center;
}
.result-main-label {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--teal, #2A9D8F);
  margin-bottom: 8px;
}
.result-main-value {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: clamp(36px, 5vw, 48px);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--lt-ink, #1A2028);
  line-height: 1;
}
.result-main-unit {
  font-size: 20px;
  font-weight: 400;
  color: var(--lt-mid, #52616E);
  margin-left: 4px;
}

/* Secondary results grid */
.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--lt-card-2, #D8DDD6);
  margin-bottom: 24px;
  border: 1px solid var(--lt-card-2, #D8DDD6);
}
.result-item {
  background: #fff;
  padding: 20px 16px;
  text-align: center;
}
.result-item-label {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lt-mid, #52616E);
  margin-bottom: 6px;
}
.result-item-value {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--lt-ink, #1A2028);
}
.result-item-unit {
  font-size: 12px;
  font-weight: 400;
  color: var(--lt-mid, #52616E);
}

/* Recommendation box */
.result-recommendation {
  padding: 20px;
  background: rgba(212,115,26,0.06);
  border: 1px solid rgba(212,115,26,0.2);
  border-radius: 2px;
  margin-bottom: 16px;
}
.result-recommendation-title {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange, #d4731a);
  margin-bottom: 8px;
}
.result-recommendation p {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 14px;
  line-height: 1.6;
  color: var(--lt-ink, #1A2028);
}

/* Warning box */
.result-warning {
  padding: 16px 20px;
  background: rgba(42,157,143,0.06);
  border: 1px solid rgba(42,157,143,0.2);
  border-radius: 2px;
  margin-top: 16px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.result-warning svg {
  flex-shrink: 0;
  color: var(--teal, #2A9D8F);
  margin-top: 2px;
}
.result-warning p {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 13px;
  line-height: 1.5;
  color: var(--lt-ink, #1A2028);
}

/* ============================================================
   ARGUS CTA (in-page upgrade prompt)
   ============================================================ */

.argus-cta {
  padding: 64px 10%;
  background: var(--bg-card, #182633);
  border-top: 1px solid var(--border, rgba(255,255,255,0.08));
  border-bottom: 1px solid var(--border, rgba(255,255,255,0.08));
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
}
.argus-cta h3 {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-weight: 700;
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.3;
  color: var(--text-1, #F0EDE8);
  margin-bottom: 12px;
}
.argus-cta p {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 15px;
  font-weight: 300;
  line-height: 1.75;
  color: var(--text-2, #8FA3B8);
  max-width: 500px;
}
.argus-cta-features {
  display: flex;
  gap: 24px;
  margin-top: 20px;
  flex-wrap: wrap;
}
.argus-cta-feat {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal-lt, #40BFB0);
  display: flex;
  align-items: center;
  gap: 6px;
}
.argus-cta-feat svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}
.argus-cta .cta-badge {
  display: inline-block;
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--orange, #d4731a);
  color: #fff;
  padding: 3px 10px;
  border-radius: 2px;
  margin-bottom: 14px;
}

/* calc-cta alias (used in mockup) */
.calc-cta {
  padding: 80px 10%;
  background: var(--bg-card, #182633);
  border-top: 1px solid var(--border, rgba(255,255,255,0.08));
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
}
.calc-cta h3 {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-weight: 700;
  color: var(--text-1, #F0EDE8);
  margin-bottom: 12px;
}
.calc-cta p {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 15px;
  font-weight: 300;
  line-height: 1.75;
  color: var(--text-2, #8FA3B8);
  max-width: 500px;
}
.calc-cta-features {
  display: flex;
  gap: 24px;
  margin-top: 20px;
  flex-wrap: wrap;
}
.calc-cta-feat {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal-lt, #40BFB0);
  display: flex;
  align-items: center;
  gap: 6px;
}
.calc-cta-feat svg {
  width: 14px;
  height: 14px;
}

/* ============================================================
   FORMULA EXPLANATION SECTION
   ============================================================ */

.calc-formula {
  padding: 64px 10%;
  border-top: 1px solid var(--border, rgba(255,255,255,0.08));
  background: var(--bg, #0F1923);
}
.calc-formula-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}
.calc-formula h3 {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-weight: 700;
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.2;
  color: var(--text-1, #F0EDE8);
  margin-bottom: 16px;
}
.calc-formula p {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 15px;
  font-weight: 300;
  line-height: 1.8;
  color: var(--text-2, #8FA3B8);
}
.formula-box {
  padding: 24px 32px;
  background: var(--surface, #1E2F3D);
  border: 1px solid var(--border-card, #2A3545);
  border-radius: 2px;
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 15px;
  color: var(--orange-lt, #e8893a);
  line-height: 2;
  margin-top: 16px;
  overflow-x: auto;
}
.formula-var {
  color: var(--text-2, #8FA3B8);
  font-size: 13px;
}

/* ============================================================
   RELATED CALCULATORS GRID
   ============================================================ */

.calc-related {
  padding: 64px 10%;
  border-top: 1px solid var(--border, rgba(255,255,255,0.08));
  background: var(--bg, #0F1923);
}
.calc-related h3 {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-weight: 700;
  font-size: clamp(16px, 1.8vw, 22px);
  color: var(--text-1, #F0EDE8);
  margin-bottom: 32px;
}
.calc-related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border, rgba(255,255,255,0.08));
}
.calc-related-card {
  background: var(--bg-card, #182633);
  padding: 32px 28px;
  text-decoration: none;
  transition: background .2s;
  display: block;
}
.calc-related-card:hover {
  background: var(--surface, #1E2F3D);
}
.calc-related-card .tool-card-num {
  margin-bottom: 8px;
}
.calc-related-card h4 {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-weight: 600;
  color: var(--text-1, #F0EDE8);
  font-size: 16px;
  margin-bottom: 8px;
  line-height: 1.3;
}
.calc-related-card p {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 13px;
  font-weight: 300;
  line-height: 1.6;
  color: var(--text-2, #8FA3B8);
}

/* ============================================================
   REGISTRATION GATE MODAL
   ============================================================ */

.gate-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}
.gate-modal-overlay.active {
  display: flex;
}

.gate-modal {
  background: var(--bg, #0F1923);
  color: var(--text-1, #F0EDE8);
  max-width: 440px;
  width: 90%;
  border-radius: 4px;
  padding: 40px;
  border: 1px solid var(--border-card, #2A3545);
  position: relative;
  max-height: 90vh;
  overflow-y: auto;
}
.gate-modal h3 {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-1, #F0EDE8);
  margin-bottom: 12px;
  line-height: 1.2;
}
.gate-modal p {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 14px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--text-2, #8FA3B8);
  margin-bottom: 28px;
}

.gate-field {
  margin-bottom: 16px;
}
.gate-field label {
  display: block;
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-2, #8FA3B8);
  margin-bottom: 6px;
}
.gate-field input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-card, #2A3545);
  border-radius: 2px;
  background: var(--surface, #1E2F3D);
  color: var(--text-1, #F0EDE8);
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 15px;
  outline: none;
  transition: border-color .2s;
}
.gate-field input:focus {
  border-color: var(--orange, #d4731a);
}
.gate-field input::placeholder {
  color: var(--text-3, rgba(143,163,184,0.45));
}

/* Gate modal consent checkbox */
.gate-consent {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 20px 0;
  cursor: pointer;
}
.gate-consent input[type="checkbox"] {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 2px;
  accent-color: var(--orange, #d4731a);
  cursor: pointer;
}
.gate-consent span {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 12px;
  font-weight: 300;
  line-height: 1.6;
  color: var(--text-2, #8FA3B8);
}
.gate-consent a {
  color: var(--orange, #d4731a);
  text-decoration: none;
}
.gate-consent a:hover {
  text-decoration: underline;
}

/* Gate modal error / info text */
.gate-error {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: #e74c3c;
  margin-top: 8px;
  display: none;
}
.gate-error.visible {
  display: block;
}

.gate-info {
  font-family: var(--head, 'Montserrat', sans-serif);
  font-size: 11px;
  font-weight: 300;
  line-height: 1.5;
  color: var(--text-3, rgba(143,163,184,0.45));
  margin-top: 12px;
  text-align: center;
}

/* Gate spinner (loading animation) */
.gate-spinner {
  display: none;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin: 0 auto;
}
.gate-spinner.visible {
  display: block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================================
   RESPONSIVE — 900px BREAKPOINT
   ============================================================ */

@media (max-width: 900px) {
  /* Hub */
  .tools-hero {
    padding: 100px 6% 60px;
  }
  .tools-grid {
    grid-template-columns: 1fr;
    padding: 40px 6%;
  }
  .tool-card {
    padding: 36px 28px;
  }
  .tools-cta {
    flex-direction: column;
    text-align: center;
    padding: 60px 6%;
  }
  .tools-cta-text p {
    max-width: 100%;
  }

  /* Calculator hero */
  .calculator-hero {
    padding: 100px 6% 40px;
  }
  .calculator-hero h1 {
    font-size: clamp(24px, 6vw, 38px);
  }

  /* Calculator workspace */
  .calc-main {
    grid-template-columns: 1fr;
  }
  .calc-inputs,
  .calc-results {
    padding: 36px 28px;
  }

  /* Formula */
  .calc-formula {
    padding: 48px 6%;
  }
  .calc-formula-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  /* Related */
  .calc-related {
    padding: 48px 6%;
  }
  .calc-related-grid {
    grid-template-columns: 1fr;
  }

  /* ARGUS CTA */
  .argus-cta,
  .calc-cta {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 60px 6%;
  }
  .argus-cta p,
  .calc-cta p {
    max-width: 100%;
  }
  .argus-cta-features,
  .calc-cta-features {
    justify-content: center;
  }

  /* Result grid */
  .result-grid {
    grid-template-columns: 1fr 1fr;
  }

  /* Gate modal */
  .gate-modal {
    padding: 28px 24px;
  }
}

@media (max-width: 480px) {
  .result-grid {
    grid-template-columns: 1fr;
  }
  .calc-related-grid {
    grid-template-columns: 1fr;
  }
  .tools-grid {
    padding: 24px 4%;
  }
  .tool-card {
    padding: 28px 20px;
  }
  .argus-cta-features,
  .calc-cta-features {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }
}

/* ============================================================
   WORKFLOW BAR — project status at top of calculator
   ============================================================ */

.workflow-bar {
  padding: 0 10%;
  margin-top: -20px;
  margin-bottom: 24px;
}

.workflow-empty {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--bg-card, #1a1e26);
  border: 1px dashed var(--border, rgba(255,255,255,0.08));
  border-radius: 6px;
}

.workflow-active {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 12px 20px;
  background: var(--bg-card, #1a1e26);
  border: 1px solid var(--orange, #d4731a);
  border-radius: 6px;
}

.workflow-label {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--orange, #d4731a);
}

.workflow-project-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 0 0 auto;
}

.workflow-project-name {
  font-family: var(--heading, 'Montserrat', sans-serif);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1, #F0EDE8);
}

.workflow-material {
  font-size: 11px;
  color: var(--text-2, #8FA3B8);
}

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

.workflow-path-name {
  font-size: 11px;
  color: var(--text-2, #8FA3B8);
  white-space: nowrap;
}

.workflow-step-count {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 11px;
  color: var(--orange, #d4731a);
  white-space: nowrap;
}

.workflow-progress-bar {
  flex: 1;
  height: 4px;
  background: var(--border, rgba(255,255,255,0.08));
  border-radius: 2px;
  overflow: hidden;
  min-width: 60px;
}

.workflow-progress-fill {
  height: 100%;
  background: var(--orange, #d4731a);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.workflow-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.workflow-btn {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 14px;
  border: 1px solid var(--border, rgba(255,255,255,0.08));
  border-radius: 3px;
  background: transparent;
  color: var(--text-2, #8FA3B8);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.workflow-btn:hover {
  border-color: var(--orange, #d4731a);
  color: var(--orange, #d4731a);
}

.workflow-btn-start {
  border-color: var(--orange, #d4731a);
  color: var(--orange, #d4731a);
}

.workflow-btn-pdf {
  border-color: var(--teal, #2A9D8F);
  color: var(--teal, #2A9D8F);
}
.workflow-btn-pdf:hover {
  background: var(--teal, #2A9D8F);
  color: #fff;
}

.workflow-btn-clear {
  padding: 6px 8px;
}
.workflow-btn-clear:hover {
  border-color: #e74c3c;
  color: #e74c3c;
}

/* ============================================================
   WORKFLOW MODAL — project creation
   ============================================================ */

.workflow-modal-content {
  max-width: 640px;
}

.workflow-name-field {
  margin: 20px 0;
}

.workflow-name-field label {
  display: block;
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-2, #8FA3B8);
  margin-bottom: 6px;
}

.workflow-name-field input {
  width: 100%;
  padding: 10px 14px;
  font-family: var(--body, 'DM Sans', sans-serif);
  font-size: 14px;
  background: var(--bg, #12161C);
  border: 1px solid var(--border, rgba(255,255,255,0.08));
  border-radius: 4px;
  color: var(--text-1, #F0EDE8);
  box-sizing: border-box;
}

.workflow-name-field input:focus {
  outline: none;
  border-color: var(--orange, #d4731a);
}

.workflow-paths-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.workflow-path-card {
  text-align: left;
  padding: 16px;
  background: var(--bg, #12161C);
  border: 1px solid var(--border, rgba(255,255,255,0.08));
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  color: inherit;
  font-family: inherit;
}

.workflow-path-card:hover {
  border-color: var(--orange, #d4731a);
  transform: translateY(-2px);
}

.workflow-path-card h4 {
  font-family: var(--heading, 'Montserrat', sans-serif);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1, #F0EDE8);
  margin: 0 0 6px;
}

.workflow-path-card p {
  font-size: 12px;
  color: var(--text-2, #8FA3B8);
  margin: 0 0 10px;
  line-height: 1.5;
}

.workflow-path-steps {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--orange, #d4731a);
}

.workflow-path-free {
  border-style: dashed;
}

/* ============================================================
   SUGGESTIONS PANEL — shown after calculation
   ============================================================ */

.workflow-suggestions {
  padding: 0 10%;
  margin-top: 24px;
  margin-bottom: 40px;
}

.workflow-suggestions h4 {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--orange, #d4731a);
  margin: 0 0 14px;
}

.suggestions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
}

.suggestion-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: var(--bg-card, #1a1e26);
  border: 1px solid var(--border, rgba(255,255,255,0.08));
  border-radius: 6px;
  text-decoration: none;
  transition: all 0.2s;
  position: relative;
}

.suggestion-card:hover {
  border-color: var(--orange, #d4731a);
  transform: translateY(-2px);
}

.suggestion-primary {
  border-color: var(--orange, #d4731a);
  border-width: 1.5px;
}

.suggestion-type {
  font-family: var(--mono, 'DM Mono', monospace);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-2, #8FA3B8);
}

.suggestion-primary .suggestion-type {
  color: var(--orange, #d4731a);
}

.suggestion-name {
  font-family: var(--heading, 'Montserrat', sans-serif);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-1, #F0EDE8);
}

.suggestion-arrow {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-2, #8FA3B8);
  font-size: 16px;
  transition: transform 0.2s;
}

.suggestion-card:hover .suggestion-arrow {
  transform: translateY(-50%) translateX(3px);
  color: var(--orange, #d4731a);
}

/* ============================================================
   WORKFLOW — responsive
   ============================================================ */

@media (max-width: 768px) {
  .workflow-bar {
    padding: 0 5%;
  }

  .workflow-active {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .workflow-progress {
    flex-wrap: wrap;
  }

  .workflow-actions {
    justify-content: flex-end;
  }

  .workflow-paths-grid {
    grid-template-columns: 1fr;
  }

  .workflow-suggestions {
    padding: 0 5%;
  }

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

/* ── Project gating badge ─────────────────────────────── */
.workflow-gate-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(42, 157, 143, 0.15);
  color: #2A9D8F;
  border: 1px solid rgba(42, 157, 143, 0.3);
}

.workflow-gate-badge.at-limit {
  background: rgba(212, 115, 26, 0.15);
  color: #d4731a;
  border-color: rgba(212, 115, 26, 0.4);
  animation: pulse-limit 2s ease-in-out infinite;
}

@keyframes pulse-limit {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}