@import url('https://fonts.googleapis.com/css2?family=Barlow:wght@400;500;600;700;800&family=Syne:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ─── CSS Variables ─────────────────────────────── */
:root {
  --bg-base:        #f0f2f5;
  --bg-panel:       #ffffff;
  --bg-card:        #ffffff;
  --bg-input:       #f5f6f8;
  --bg-hover:       #eef0f4;

  --teal:           #2563eb;
  --teal-dim:       #1d4ed8;
  --teal-glow:      rgba(37,99,235,0.08);
  --emerald:        #10b981;
  --emerald-dim:    #059669;
  --amber:          #d97706;
  --red:            #ef4444;
  --red-dim:        #dc2626;
  --blue-accent:    #3b82f6;

  --text-primary:   #1a2332;
  --text-secondary: #4a5568;
  --text-muted:     #8896a7;
  --text-teal:      #2563eb;

  --border:         rgba(0,0,0,0.08);
  --border-hover:   rgba(0,0,0,0.18);
  --border-card:    rgba(0,0,0,0.08);

  --shadow-card:    0 1px 4px rgba(0,0,0,0.05);
  --shadow-glow:    0 0 12px rgba(37,99,235,0.08);

  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;

  --font-main:  'Barlow', 'Syne', sans-serif;
  --font-mono:  'JetBrains Mono', monospace;
}

/* ─── Reset ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

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

/* ─── Header ─────────────────────────────────────── */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(135deg, #1e3a5f, #24476e, #1e3a5f);
  border-bottom: 1px solid rgba(0,0,0,0.12);
  padding: 0 28px;
}

.header-inner {
  max-width: 100%;
  margin: 0 auto;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-block {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-icon {
  width: 30px;
  height: 30px;
  background: rgba(255,255,255,0.18);
  border-radius: 6px;
  display: grid;
  place-items: center;
  font-size: 15px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -1px;
  flex-shrink: 0;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-title {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.4px;
}

.logo-sub {
  font-size: 11px;
  color: rgba(255,255,255,0.75);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
}

.header-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: rgba(255,255,255,0.7);
  letter-spacing: 1.8px;
  text-transform: uppercase;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  background: #fff;
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.7); }
}

/* ─── Home Button ────────────────────────────────── */
.home-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: rgba(255,255,255,0.10);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 6px;
  color: rgba(255,255,255,0.8);
  font-family: var(--font-main);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.02em;
}
.home-btn:hover {
  background: rgba(255,255,255,0.18);
  color: #fff;
  border-color: rgba(255,255,255,0.30);
}
.home-btn svg { flex-shrink: 0; }

/* ─── App Layout ─────────────────────────────────── */
.app-wrap {
  position: relative;
  z-index: 1;
  max-width: 100%;
  margin: 0 auto;
  padding: 24px 24px 80px;
  display: grid;
  grid-template-columns: 420px 1fr 440px;
  gap: 22px;
  align-items: start;
}

/* Left panel — narrow system + presets */
.left-panel {
  position: sticky;
  top: 80px;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  box-shadow: 1px 0 4px rgba(0,0,0,0.03);
}

/* Center panel — results */
.center-panel {
  min-height: 500px;
  background: var(--bg-base);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  color: var(--text-primary);
}
.center-panel .empty-state { color: var(--text-muted); }
.center-panel .empty-state h3 { color: var(--text-secondary); }
.center-panel .empty-state p { color: var(--text-muted); }
.center-panel .empty-icon {
  border-color: rgba(37,99,235,0.25);
  background: rgba(37,99,235,0.04);
}

/* Right panel — sticky inputs */
.right-panel {
  position: sticky;
  top: 80px;
  background: var(--bg-panel);
  border-left: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  box-shadow: -1px 0 4px rgba(0,0,0,0.03);
}

/* ─── Section Labels ─────────────────────────────── */
.section-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.section-label .num {
  width: 24px;
  height: 24px;
  background: var(--teal);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.section-label h3 {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* ─── Card ───────────────────────────────────────── */
.card {
  background: var(--bg-panel);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.card + .card { margin-top: 16px; }

/* ─── System Grid ────────────────────────────────── */
.system-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.sys-btn {
  padding: 10px 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
  letter-spacing: 0.04em;
}

.sys-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--bg-hover);
}

.sys-btn.active {
  background: var(--teal-glow);
  border-color: rgba(37,99,235,0.22);
  color: var(--teal);
  box-shadow: none;
}

.sys-btn.disabled-sys {
  opacity: 0.35;
  cursor: not-allowed;
}

.sys-btn .coming {
  display: block;
  font-size: 8px;
  font-family: var(--font-mono);
  color: var(--amber);
  margin-top: 2px;
  letter-spacing: 0.08em;
}

/* ─── Steel Reinforcement Toggle ─────────────────── */
.steel-toggle-wrap {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--border-card);
}

.steel-toggle {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
}

.steel-toggle input {
  display: none;
}

.steel-slider {
  width: 40px;
  height: 22px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 11px;
  position: relative;
  transition: all 0.25s;
  flex-shrink: 0;
}

.steel-slider::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 14px;
  height: 14px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: all 0.25s;
}

.steel-toggle input:checked + .steel-slider {
  background: var(--teal-glow);
  border-color: var(--teal);
}

.steel-toggle input:checked + .steel-slider::after {
  left: 21px;
  background: var(--teal);
}

.steel-toggle input:disabled + .steel-slider {
  opacity: 0.35;
  cursor: not-allowed;
}

.steel-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.steel-toggle input:checked ~ .steel-label {
  color: var(--teal);
}

.tag-steel {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 10px;
  background: rgba(37,99,235,0.10);
  color: var(--blue-accent);
  vertical-align: middle;
  margin-left: 6px;
  letter-spacing: 0.04em;
}

.tag-steel-sm {
  background: rgba(37,99,235,0.10) !important;
  color: var(--blue-accent) !important;
}

/* ─── Steel Combo Breakdown Grid ─────────────────── */
.combo-grid {
  display: flex;
  align-items: stretch;
  gap: 0;
  margin: 16px 0 12px;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-card);
}

.combo-item {
  flex: 1;
  padding: 14px 12px;
  text-align: center;
}

.combo-item.combo-steel {
  background: rgba(37,99,235,0.05);
  border-left: 1px solid rgba(37,99,235,0.12);
  border-right: 1px solid rgba(37,99,235,0.12);
}

.combo-item.combo-total {
  background: rgba(0,201,177,0.06);
}

.combo-op {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  min-width: 28px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-muted);
}

.combo-label {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.combo-steel .combo-label { color: var(--blue-accent); }
.combo-total .combo-label { color: var(--teal); }

.combo-ref {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.combo-val {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
}

.combo-ix {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 4px;
}

.reco-alt {
  margin-top: 14px;
  padding: 10px 14px;
  background: rgba(245,166,35,0.06);
  border: 1px solid rgba(245,166,35,0.15);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--amber);
  line-height: 1.5;
}

.reco-alt strong {
  color: var(--text-primary);
  font-weight: 600;
}

.td-steel-name {
  color: var(--blue-accent) !important;
  font-weight: 600;
}

.td-fab-name {
  color: var(--amber) !important;
  font-weight: 600;
  font-size: 10px;
}

.combo-fab {
  background: rgba(245,166,35,0.06) !important;
  border-left: 1px solid rgba(245,166,35,0.15) !important;
  border-right: 1px solid rgba(245,166,35,0.15) !important;
}

.combo-fab .combo-label {
  color: var(--amber) !important;
}

.combo-desc {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-muted);
  margin-top: 3px;
  opacity: 0.7;
}

/* ─── Wall Type Toggle ──────────────────────────────── */
.wall-type-wrap {
  margin-bottom: 16px;
}

.wall-type-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.wall-type-btns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.wt-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 12px 8px 10px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-card);
  background: var(--bg-input);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.wt-btn:hover {
  border-color: var(--border-hover);
  background: var(--bg-hover);
}

.wt-btn.active {
  border-color: rgba(37,99,235,0.22);
  background: var(--teal-glow);
  color: var(--text-primary);
  box-shadow: none;
}

.wt-icon {
  font-size: 20px;
  line-height: 1;
  font-weight: 700;
  color: var(--text-muted);
}

.wt-btn.active .wt-icon {
  color: var(--teal);
}

.wt-name {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.wt-desc {
  font-size: 9px;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.3;
}

/* ─── Spandrel Config ───────────────────────────────── */
.spandrel-config {
  margin-top: 16px;
  padding: 14px;
  background: rgba(37,99,235,0.04);
  border: 1px solid rgba(37,99,235,0.12);
  border-radius: var(--radius-md);
}

.spandrel-header {
  margin-bottom: 12px;
}

.spandrel-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--blue-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 2px;
}

.spandrel-hint {
  font-size: 10px;
  color: var(--text-muted);
}

/* ─── Support Rows ──────────────────────────────────── */
.support-rows {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 12px;
}

.support-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.support-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  min-width: 24px;
  border-radius: 50%;
  background: rgba(37,99,235,0.10);
  color: var(--blue-accent);
  font-size: 11px;
  font-weight: 700;
  margin-top: 22px;
}

.support-field {
  flex: 1;
  gap: 4px !important;
}

.support-field label {
  font-size: 9px !important;
}

.support-field input {
  font-size: 12px;
  padding: 6px 8px;
}

/* ─── Span Summary / Visual ─────────────────────────── */
.span-summary {
  margin-top: 14px;
  padding: 12px;
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.span-summary-title {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.span-visual {
  display: flex;
  gap: 16px;
  align-items: stretch;
}

.span-bar-wrap {
  position: relative;
  width: 28px;
  min-width: 28px;
  border-radius: 4px;
  overflow: visible;
}

.span-bar-line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-card);
  transform: translateX(-50%);
}

.span-bar-support {
  position: absolute;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--blue-accent);
  border-radius: 2px;
  transform: translateY(50%);
  z-index: 2;
}

.span-bar-span {
  position: absolute;
  left: 4px;
  right: 4px;
  background: rgba(0,201,177,0.1);
  border: 1px solid rgba(0,201,177,0.2);
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.span-bar-span.critical {
  background: rgba(0,201,177,0.2);
  border-color: var(--teal);
}

.span-bar-label {
  font-size: 8px;
  font-family: var(--font-mono);
  color: var(--teal);
  white-space: nowrap;
  writing-mode: vertical-lr;
  transform: rotate(180deg);
}

.span-table {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.span-row {
  display: flex;
  gap: 8px;
  padding: 4px 8px;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  border-radius: 3px;
}

.span-row-crit {
  background: rgba(0,201,177,0.08);
  color: var(--teal);
}

.span-row-name {
  min-width: 52px;
  font-weight: 600;
}

.span-row-range {
  color: var(--text-muted);
  min-width: 90px;
}

.span-row-len {
  margin-left: auto;
}

.span-design-note {
  margin-top: 10px;
  font-size: 11px;
  color: var(--text-secondary);
  padding: 6px 10px;
  background: rgba(0,201,177,0.06);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--teal);
}

/* ─── Spandrel Ribbon in Results ─────────────────────── */
.spandrel-ribbon {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  margin: 8px 0;
  background: rgba(37,99,235,0.06);
  border: 1px solid rgba(37,99,235,0.12);
  border-radius: var(--radius-sm);
  font-size: 11px;
  color: var(--blue-accent);
}

.spandrel-ribbon-icon {
  font-size: 16px;
  font-weight: 700;
}

.spandrel-ribbon strong {
  color: var(--text-primary);
}

/* ─── MS Fabricated Stiffener Note ───────────────────── */
.stiff-fab-note {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 10px 14px;
  margin-top: 12px;
  background: rgba(245,166,35,0.06);
  border: 1px solid rgba(245,166,35,0.18);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.stiff-fab-icon {
  font-size: 18px;
  margin-top: 1px;
}

.stiff-fab-note strong {
  color: var(--amber);
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}

.stiff-fab-desc {
  font-size: 11px;
  color: var(--text-muted);
}

/* ─── Stiffener Type Tags ────────────────────────────── */
.tag-fab {
  display: inline-block;
  font-size: 8px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 8px;
  background: rgba(245,166,35,0.15);
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.tag-rhs {
  display: inline-block;
  font-size: 8px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 8px;
  background: rgba(37,99,235,0.10);
  color: var(--blue-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.td-stiff {
  text-align: center;
}

/* ─── Deflection Analysis Table ──────────────────────── */
.defl-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
  padding: 10px 14px;
  background: rgba(0,201,177,0.04);
  border: 1px solid rgba(0,201,177,0.12);
  border-radius: var(--radius-sm);
}

.defl-params {
  display: flex;
  gap: 16px;
  font-size: 11px;
  color: var(--text-secondary);
}

.defl-params strong {
  color: var(--text-primary);
  font-weight: 600;
}

.defl-formula {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--teal-dim);
  opacity: 0.7;
}

.defl-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.defl-table thead th {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 8px 8px;
  border-bottom: 1px solid var(--border-card);
  text-align: left;
}

.defl-table tbody td {
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
}

.defl-table .td-over {
  color: var(--red) !important;
  font-weight: 700;
}

.defl-note {
  margin-top: 12px;
  font-size: 10px;
  color: var(--text-muted);
  line-height: 1.5;
  padding: 8px 10px;
  background: var(--bg-input);
  border-radius: var(--radius-sm);
}

/* ─── Form Controls ──────────────────────────────── */
.inputs-stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.inputs-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

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

.field label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

.field label .unit {
  color: var(--text-muted);
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
}

.field input,
.field select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
}

.field input:focus,
.field select:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(0,201,177,0.1);
}

.field select option {
  background: var(--bg-card);
  color: var(--text-primary);
}

.field-hint {
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  line-height: 1.4;
}

/* ─── Advanced Toggle ────────────────────────────── */
.advanced-toggle {
  margin-top: 16px;
  padding: 8px 0;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
  transition: color 0.2s;
}

.advanced-toggle:hover {
  color: var(--text-secondary);
}

.advanced-panel {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border-card);
}

/* ─── Preset Grid ────────────────────────────────── */
.preset-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.preset-btn {
  padding: 10px 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}

.preset-btn:hover {
  border-color: var(--border-hover);
  background: var(--bg-hover);
}

.preset-val {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--teal);
}

.preset-desc {
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-top: 2px;
}

/* ─── Calculate Button ───────────────────────────── */
.calc-btn {
  width: 100%;
  padding: 13px 24px;
  background: var(--teal);
  border: none;
  border-radius: 8px;
  color: #fff;
  font-family: var(--font-main);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 12px;
}

.calc-btn:hover {
  background: #3b82f6;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(37,99,235,0.3);
}

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

.calc-btn svg { flex-shrink: 0; }

/* ─── Empty State ─────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  text-align: center;
  gap: 16px;
  color: var(--text-muted);
}

.empty-icon {
  width: 80px;
  height: 80px;
  border: 2px dashed rgba(0,201,177,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
}

.empty-state h3 {
  font-size: 16px;
  color: var(--text-secondary);
}

.empty-state p {
  font-size: 13px;
  max-width: 300px;
  line-height: 1.5;
}

/* ═══════════════════════════════════════════════════
   RECOMMENDATION HERO CARD
   ═══════════════════════════════════════════════════ */
.reco-hero {
  border-color: rgba(16,185,129,0.25) !important;
  background: linear-gradient(135deg, rgba(16,185,129,0.04), var(--bg-panel)) !important;
  position: relative;
  overflow: hidden;
}

.reco-hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--emerald));
}

.fail-hero {
  border-color: rgba(255,77,77,0.3) !important;
  background: linear-gradient(135deg, rgba(255,77,77,0.05), var(--bg-panel)) !important;
}

.fail-hero::after {
  background: linear-gradient(90deg, var(--red), var(--red-dim)) !important;
}

.reco-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.reco-badge.pass {
  background: rgba(16,217,136,0.12);
  color: var(--emerald);
  border: 1px solid rgba(16,217,136,0.3);
}

.reco-badge.fail {
  background: rgba(255,77,77,0.12);
  color: var(--red);
  border: 1px solid rgba(255,77,77,0.3);
}

.reco-profile {
  margin-bottom: 20px;
}

.reco-ref {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.reco-depth {
  font-size: 14px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  margin-top: 4px;
}

.tag-reinf {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 10px;
  background: rgba(245,166,35,0.15);
  color: var(--amber);
  vertical-align: middle;
  margin-left: 8px;
  letter-spacing: 0.04em;
}

/* ─── Recommendation Stats ───────────────────────── */
.reco-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.reco-stat {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 12px;
  text-align: center;
}

.reco-stat-val {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--teal);
  line-height: 1;
  margin-bottom: 4px;
}

.reco-stat-lbl {
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

/* ─── Recommendation Bars ────────────────────────── */
.reco-bars {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.reco-bar-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.reco-bar-lbl {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 100px;
  text-align: right;
}

.reco-bar-track {
  flex: 1;
  height: 8px;
  background: rgba(0,0,0,0.06);
  border-radius: 4px;
  overflow: hidden;
}

.reco-bar-fill {
  height: 100%;
  border-radius: 4px;
  background: var(--emerald);
  transition: width 0.6s ease;
}

.reco-bar-fill.high {
  background: var(--amber);
}

.reco-bar-val {
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 44px;
}

/* ─── Recommendation Note ────────────────────────── */
.reco-note {
  font-size: 12px;
  color: var(--emerald);
  padding: 12px 14px;
  background: rgba(16,217,136,0.05);
  border: 1px solid rgba(16,217,136,0.15);
  border-radius: var(--radius-sm);
  line-height: 1.6;
}

.reco-note-sub {
  display: block;
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-top: 2px;
}

/* ─── Fail State ─────────────────────────────────── */
.reco-fail-msg {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}

.reco-fail-msg p { margin-bottom: 8px; }

.fail-params {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  padding: 10px 14px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  margin: 8px 0;
}

.fail-hint {
  font-size: 13px;
  color: var(--text-secondary);
}

.fail-req {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-top: 8px;
}

/* ═══════════════════════════════════════════════════
   REQUIRED PROPERTIES GRID
   ═══════════════════════════════════════════════════ */
.req-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.req-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 14px 12px;
  text-align: center;
}

.req-val {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--blue-accent);
  line-height: 1;
  margin-bottom: 4px;
}

.req-lbl {
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

/* ═══════════════════════════════════════════════════
   COMPARISON TABLE
   ═══════════════════════════════════════════════════ */
.compare-wrap {
  overflow-x: auto;
}

.compare-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 12px;
}

.compare-table th {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  padding: 8px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border-card);
  white-space: nowrap;
}

.compare-table td {
  padding: 10px 10px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
}

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

/* Row states */
.row-best {
  background: rgba(16,217,136,0.08) !important;
}
.row-best td {
  color: var(--emerald) !important;
  font-weight: 600;
}

.row-pass td {
  color: var(--text-secondary);
}

.row-fail {
  opacity: 0.55;
}
.row-fail td {
  color: var(--text-muted);
}

/* Cell types */
.td-icon {
  text-align: center;
  font-size: 14px;
}

.row-best .td-icon { color: var(--emerald); }
.row-pass .td-icon { color: var(--teal-dim); }
.row-fail .td-icon { color: var(--red-dim); }

.td-ref {
  font-weight: 600;
  color: var(--text-primary) !important;
}

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

.td-pct {
  font-size: 10px;
  color: var(--text-muted);
  margin-left: 4px;
}

.row-best .td-pct { color: var(--emerald) !important; }

.td-status {
  font-weight: 700;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.row-best .td-status { color: var(--emerald) !important; }
.row-pass .td-status { color: var(--teal-dim); }
.row-fail .td-status { color: var(--red-dim); }

.tag-sm {
  font-size: 8px;
  padding: 1px 5px;
  border-radius: 8px;
  background: rgba(245,166,35,0.15);
  color: var(--amber);
  font-weight: 700;
  letter-spacing: 0.04em;
  vertical-align: middle;
  margin-left: 4px;
}

.fail-indicator {
  font-size: 9px;
  color: var(--red);
  margin-left: 4px;
  opacity: 0.7;
}

/* ─── Mini Bars ──────────────────────────────────── */
.mini-bar-wrap {
  display: inline-block;
  width: 50px;
  height: 4px;
  background: rgba(0,0,0,0.06);
  border-radius: 2px;
  overflow: hidden;
  vertical-align: middle;
}

.mini-bar {
  height: 100%;
  border-radius: 2px;
  background: var(--teal);
  transition: width 0.4s ease;
}

.mini-bar.over {
  background: var(--red);
}

.row-best .mini-bar { background: var(--emerald); }

/* ═══════════════════════════════════════════════════
   ENGINEERING DETAILS (Collapsible)
   ═══════════════════════════════════════════════════ */
.detail-card .detail-content {
  display: none;
  margin-top: 12px;
}

.detail-card.detail-open .detail-content {
  display: block;
}

.detail-card.detail-open .detail-toggle span::first-letter {
  content: '▾';
}

.detail-toggle {
  cursor: pointer;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  padding: 4px 0;
  user-select: none;
  transition: color 0.2s;
}

.detail-toggle:hover {
  color: var(--text-secondary);
}

/* ─── Breakdown Table ────────────────────────────── */
.breakdown-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 12px;
}

.breakdown-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}

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

.breakdown-table td:first-child {
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 12px;
  width: 45%;
}

.breakdown-table td:nth-child(2) {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--teal);
}

.breakdown-table tr.sep td {
  border-top: 1px solid var(--border-card);
  padding-top: 12px;
}

/* ═══════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════ */
.app-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: linear-gradient(135deg, #1e3a5f, #24476e, #1e3a5f);
  border-top: 1px solid rgba(0,0,0,0.12);
  padding: 10px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  font-family: var(--font-mono);
  color: rgba(255,255,255,0.6);
}

.footer-left {
  display: flex;
  gap: 12px;
  align-items: center;
}

.footer-left .sep { color: rgba(255,255,255,0.2); }
.footer-right { color: rgba(255,255,255,0.5); }

/* ═══════════════════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  animation: reveal 0.4s ease forwards;
}

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

.reveal:nth-child(1) { animation-delay: 0.05s; }
.reveal:nth-child(2) { animation-delay: 0.1s; }
.reveal:nth-child(3) { animation-delay: 0.15s; }
.reveal:nth-child(4) { animation-delay: 0.2s; }

/* ═══════════════════════════════════════════════════
   MULTI-PANEL GRID PREVIEW
   ═══════════════════════════════════════════════════ */
.multi-panel-config {
  margin-top: 16px;
  padding: 16px;
  background: rgba(37,99,235,0.04);
  border: 1px solid rgba(37,99,235,0.12);
  border-radius: var(--radius-md);
}

/* Division mode toggle */
.div-mode-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
}
.div-mode-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.div-mode-btns {
  display: flex;
  gap: 4px;
}
.div-btn {
  padding: 4px 12px;
  font-size: 11px;
  font-weight: 600;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}
.div-btn:hover { background: rgba(59,130,246,0.10); }
.div-btn.active {
  background: var(--blue-accent);
  color: #fff;
  border-color: var(--blue-accent);
}

/* Custom size inputs */
.custom-sizes {
  margin-top: 10px;
}
.custom-sizes-title {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}
.custom-size-rows {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.custom-size-row {
  display: flex;
  align-items: center;
  gap: 4px;
}
.custom-size-idx {
  font-size: 10px;
  font-weight: 700;
  color: var(--text-muted);
  min-width: 22px;
  text-align: right;
  font-family: var(--font-mono);
}
.custom-size-row input {
  width: 62px;
  padding: 3px 5px;
  font-size: 11px;
  font-family: var(--font-mono);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-primary);
  text-align: center;
}
.custom-size-row input:focus {
  border-color: var(--blue-accent);
  outline: none;
}

/* Grid info bar */
.grid-info-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  font-size: 10.5px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  margin-top: 10px;
  padding: 6px 8px;
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-card);
}

/* CW Elevation drawing */
.cw-elevation {
  margin-top: 12px;
  display: flex;
  justify-content: center;
}
.cw-elev-svg {
  width: 100%;
  max-width: 340px;
  height: auto;
}
.cw-elev-empty {
  padding: 20px;
  text-align: center;
  font-size: 11px;
  color: var(--text-muted);
  font-style: italic;
}

/* Multi-panel ribbon in results */
.multi-ribbon {
  background: rgba(59,130,246,0.08) !important;
  border-color: rgba(59,130,246,0.18) !important;
}

/* ═══════════════════════════════════════════════════
   REPORT BUTTON
   ═══════════════════════════════════════════════════ */
.report-btn {
  background: linear-gradient(135deg, #475569, #334155) !important;
  margin-top: 8px !important;
}

.report-btn:hover {
  box-shadow: 0 8px 24px rgba(71,85,105,0.35) !important;
}

/* ═══════════════════════════════════════════════════
   MODAL OVERLAY
   ═══════════════════════════════════════════════════ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 64px rgba(0,0,0,0.15);
  max-height: 90vh;
  overflow-y: auto;
  width: 100%;
}

.stiff-lib-panel {
  max-width: 860px;
}

.report-panel {
  max-width: 900px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 12px;
  border-bottom: 1px solid var(--border-card);
}

.modal-header h2 {
  font-size: 16px;
  font-weight: 800;
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.modal-close:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.modal-subheader {
  padding: 10px 24px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-card);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 16px 24px;
  border-top: 1px solid var(--border-card);
}

.modal-btn-secondary {
  padding: 10px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.modal-btn-secondary:hover {
  border-color: var(--border-hover);
}

.modal-btn-primary {
  padding: 10px 20px;
  background: var(--teal);
  border: none;
  border-radius: var(--radius-md);
  color: #fff;
  font-family: var(--font-main);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.modal-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(37,99,235,0.3);
}

/* ═══════════════════════════════════════════════════
   REINFORCEMENT LIBRARY GRID
   ═══════════════════════════════════════════════════ */
.stiff-lib-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
  padding: 20px 24px;
}

.stiff-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 2px solid var(--border-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
}

.stiff-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card);
}

.stiff-card-selected {
  border-color: var(--teal) !important;
  box-shadow: 0 0 0 3px var(--teal-glow), var(--shadow-card);
}

.stiff-card-fab {
  border-color: rgba(224,145,0,0.15);
}

.stiff-card-fab.stiff-card-selected {
  border-color: var(--amber) !important;
  box-shadow: 0 0 0 3px rgba(224,145,0,0.1), var(--shadow-card);
}

.stiff-card-sketch {
  padding: 12px;
  display: flex;
  justify-content: center;
  background: var(--bg-input);
  border-bottom: 1px solid var(--border-card);
}

.stiff-svg {
  width: 100px;
  height: 140px;
}

.stiff-card-info {
  padding: 10px 12px;
  flex: 1;
}

.stiff-card-code {
  font-size: 14px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-primary);
  margin-bottom: 2px;
}

.stiff-card-name {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

.stiff-card-stats {
  display: flex;
  gap: 12px;
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-top: 4px;
}

.stiff-card-desc {
  font-size: 9px;
  color: var(--text-muted);
  margin-top: 4px;
  line-height: 1.4;
}

.stiff-card-type {
  position: absolute;
  top: 8px;
  right: 8px;
  font-size: 8px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 8px;
  letter-spacing: 0.04em;
}

/* ─── Reinforcement Library in Results ────────────── */
.stiff-lib-wrap {
  margin-top: 16px;
  padding: 14px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
}

.stiff-lib-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.stiff-lib-count {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.stiff-lib-selected {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.stiff-selected-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 700;
  background: rgba(0,168,150,0.1);
  color: var(--teal);
  border: 1px solid rgba(0,168,150,0.2);
}

.stiff-selected-tag.stiff-none {
  background: rgba(255,255,255,0.04);
  color: var(--text-muted);
  border-color: var(--border-card);
}

.stiff-lib-btn {
  width: 100%;
  padding: 10px;
  background: var(--bg-card);
  border: 1px dashed var(--border-hover);
  border-radius: var(--radius-sm);
  color: var(--teal);
  font-family: var(--font-main);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.stiff-lib-btn:hover {
  background: var(--bg-hover);
  border-style: solid;
}

/* ═══════════════════════════════════════════════════
   REPORT MODAL CONTENT
   ═══════════════════════════════════════════════════ */
.report-toolbar {
  padding: 12px 24px;
  border-bottom: 1px solid var(--border-card);
  display: flex;
  gap: 10px;
}

.report-content {
  padding: 24px;
  font-size: 12px;
}

.rpt-page {
  max-width: 760px;
  margin: 0 auto;
}

.rpt-header {
  border-bottom: 3px solid var(--teal);
  padding-bottom: 16px;
  margin-bottom: 24px;
}

.rpt-logo {
  font-size: 20px;
  font-weight: 800;
  color: var(--teal);
}

.rpt-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 4px;
}

.rpt-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 8px;
  font-family: var(--font-mono);
}

.rpt-section {
  margin-bottom: 24px;
}

.rpt-section-title {
  font-size: 13px;
  font-weight: 800;
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-card);
  margin-bottom: 10px;
}

.rpt-sub-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  margin: 12px 0 6px;
}

.rpt-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
}

.rpt-table td {
  padding: 5px 10px;
  border-bottom: 1px solid var(--border-card);
}

.rpt-table td:first-child {
  color: var(--text-secondary);
  width: 40%;
}

.rpt-table td:nth-child(2) {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-primary);
}

.rpt-compare {
  width: 100%;
  border-collapse: collapse;
  font-size: 10px;
}

.rpt-compare th {
  background: var(--bg-card);
  padding: 5px 8px;
  text-align: left;
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 2px solid var(--border-card);
  color: var(--text-muted);
}

.rpt-compare td {
  padding: 4px 8px;
  border-bottom: 1px solid var(--border-card);
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

.rpt-row-best {
  background: rgba(12,179,110,0.06);
}

.rpt-row-best td {
  font-weight: 700;
  color: var(--emerald);
}

.rpt-row-fail {
  opacity: 0.5;
}

.rpt-reco {
  padding: 12px;
  background: rgba(12,179,110,0.05);
  border: 1px solid rgba(12,179,110,0.15);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.rpt-reco-ref {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-primary);
}

.rpt-reco-depth {
  font-size: 12px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.rpt-sketch-wrap {
  margin: 16px 0;
  text-align: center;
}

.rpt-sketch-title {
  font-size: 10px;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.rpt-sketch svg {
  width: 140px;
  height: 180px;
}

.rpt-notes {
  padding-left: 20px;
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.rpt-notes li {
  margin-bottom: 4px;
}

.rpt-footer {
  margin-top: 32px;
  padding-top: 12px;
  border-top: 1px solid var(--border-card);
  font-size: 10px;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

/* ═══════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════ */
@media (max-width: 1100px) {
  .app-wrap {
    grid-template-columns: 1fr;
  }
  .reco-stats { grid-template-columns: repeat(4, 1fr); }
  .req-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 700px) {
  .app-wrap { padding: 16px 14px 80px; }
  .reco-stats { grid-template-columns: repeat(2, 1fr); }
  .req-grid { grid-template-columns: repeat(2, 1fr); }
  .system-grid { grid-template-columns: 1fr 1fr; }
  .inputs-row { grid-template-columns: 1fr; }
  .preset-grid { grid-template-columns: 1fr 1fr; }
  .reco-bar-lbl { min-width: 70px; font-size: 10px; }
  .stiff-lib-grid { grid-template-columns: 1fr; }
  .modal-panel { margin: 8px; }
  .rpt-meta { flex-direction: column; gap: 4px; }
}