@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700;800&family=Manrope:wght@400;500;600;700;800&display=swap");

:root {
  --brand-black: #000000;
  --brand-white: #ffffff;
  --brand-blue: #1A2D7A;
  --brand-teal: #369392;
  --brand-orange: #FF8402;
  --brand-green: #ADF6B1;
  --color-gray-50: #f8f9fa;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-400: #9ca3af;
  --color-gray-500: #666666;
  --color-gray-600: #555555;
  --brand-red: #b00020;

  --font-sans: "IBM Plex Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: "Manrope", var(--font-sans);
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;

  --container-max: 1180px;
  --content-max: 960px;
  --content-width-lg: 960px;
  --content-readable: 42rem;
  --page-margin: clamp(1.25rem, 4vw, 4.5rem);
  --sidebar-width: 300px;
  --header-height: 68px;

  --border-width: 2px;
  --border-style: solid;
  --radius: 8px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 50px;

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 15px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 12px 35px rgba(0, 0, 0, 0.2);

  --ads-bg: var(--color-gray-50);
  --ads-surface: var(--brand-white);
  --ads-surface-soft: var(--color-gray-100);
  --ads-ink: var(--brand-black);
  --ads-muted: var(--color-gray-600);
  --ads-line: var(--brand-black);
  --ads-accent: var(--brand-blue);
  --ads-accent-strong: var(--brand-blue);
  --ads-accent-soft: #eef3ff;
  --ads-warm: var(--brand-orange);
  --ads-success: var(--brand-teal);
  --ads-danger: var(--brand-red);
  --ads-shadow: var(--shadow-sm);
  --ads-radius: var(--radius);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--ads-bg);
}

body {
  max-width: min(var(--container-max), calc(100% - (2 * var(--page-margin))));
  min-height: 100vh;
  margin: 0 auto !important;
  padding: var(--space-4) 0 var(--space-6) !important;
  background: transparent !important;
  color: var(--brand-black) !important;
  font-family: var(--font-sans) !important;
  font-size: 1rem;
  line-height: 1.6;
}

/* Embedded on /tools/* pages — no inner scroll, natural height */
html.ads-embed,
html.ads-embed body {
  min-height: auto !important;
  height: auto !important;
  overflow: visible !important;
}

html.ads-embed body {
  max-width: 100% !important;
  width: 100% !important;
  margin: 0 !important;
  padding: var(--space-3) 0 var(--space-4) !important;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--brand-black);
  font-family: var(--font-display);
  letter-spacing: 0;
  line-height: 1.2;
}

h1,
.title {
  margin: 0 0 var(--space-2) !important;
  font-size: clamp(2rem, 4vw, 2.5rem) !important;
  font-weight: var(--font-weight-bold) !important;
  text-align: center;
}

h2 {
  margin: var(--space-4) 0 var(--space-2);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: var(--font-weight-semibold);
}

h3 {
  margin: var(--space-3) 0 var(--space-1);
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-weight: var(--font-weight-semibold);
}

a {
  color: var(--brand-teal);
  text-underline-offset: 0.2em;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--brand-blue);
}

p,
small,
li {
  color: var(--color-gray-600);
}

.subtitle,
.help,
.info,
.unit-text {
  color: var(--color-gray-600) !important;
}

.container,
.wrap,
.controls,
.bottom-controls,
.question,
.input-section,
.about-calculator,
.info,
.explanation,
#problematic,
#recommendations,
.targets {
  width: 100%;
  max-width: var(--container-max) !important;
  margin: var(--space-3) auto !important;
  padding: var(--space-3) !important;
  border: var(--border-width) var(--border-style) var(--brand-black) !important;
  border-radius: var(--radius) !important;
  background: var(--brand-white) !important;
  box-shadow: var(--shadow-sm) !important;
}

.container:first-child,
.wrap:first-child,
.controls:first-child {
  margin-top: 0 !important;
}

.card,
.result-section,
.results,
.report,
.component,
.product,
.volume-item,
.metric,
.canvas-wrapper,
.viewer-panel,
.controls-panel {
  border: var(--border-width) var(--border-style) var(--brand-black) !important;
  border-radius: var(--radius) !important;
  background: var(--brand-white) !important;
  box-shadow: none !important;
  color: var(--brand-black) !important;
}

.card,
.result-section,
.results,
.report,
.component,
.viewer-panel,
.controls-panel {
  padding: var(--space-3) !important;
}

.card :where(h1, h2, h3, h4, h5, h6, div, span, p, li, strong),
.result-section :where(h1, h2, h3, h4, h5, h6, div, span, p, li, strong),
.results :where(h1, h2, h3, h4, h5, h6, div, span, p, li, strong),
.report :where(h1, h2, h3, h4, h5, h6, div, span, p, li, strong),
.component :where(h1, h2, h3, h4, h5, h6, div, span, p, li, strong),
.volume-item :where(h1, h2, h3, h4, h5, h6, div, span, p, li, strong),
.metric :where(h1, h2, h3, h4, h5, h6, div, span, p, li, strong),
.viewer-panel :where(h1, h2, h3, h4, h5, h6, div, span, p, li, strong),
.controls-panel :where(h1, h2, h3, h4, h5, h6, div, span, p, li, strong) {
  color: var(--brand-black) !important;
}

.results:empty,
#result:empty {
  display: none !important;
}

label {
  display: block;
  margin-bottom: var(--space-1);
  color: var(--brand-black) !important;
  font-weight: var(--font-weight-semibold) !important;
}

input,
select,
textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px !important;
  border: var(--border-width) var(--border-style) var(--brand-black) !important;
  border-radius: var(--radius) !important;
  background: var(--brand-white) !important;
  color: var(--brand-black) !important;
  font: inherit;
  box-shadow: none !important;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--brand-teal) !important;
  box-shadow: 0 0 0 3px rgba(54, 147, 146, 0.22) !important;
}

input[type="radio"],
input[type="checkbox"] {
  width: auto;
  min-height: 0;
  margin-right: var(--space-1);
  accent-color: var(--brand-blue);
}

input[type="range"] {
  padding: 0 !important;
  accent-color: var(--brand-teal);
  background: transparent !important;
}

button,
.calculate-btn,
.generate-btn,
.reset-btn,
.view-btn,
.tabbtn,
.mini-reset {
  min-height: 44px;
  padding: 10px 16px !important;
  border: var(--border-width) var(--border-style) var(--brand-black) !important;
  border-radius: var(--radius) !important;
  background: var(--brand-blue) !important;
  color: var(--brand-white) !important;
  font: inherit;
  font-weight: var(--font-weight-bold) !important;
  line-height: 1.1;
  cursor: pointer;
  box-shadow: none !important;
  transition: transform var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}

button:hover,
.calculate-btn:hover,
.generate-btn:hover,
.reset-btn:hover,
.view-btn:hover,
.tabbtn:hover,
.mini-reset:hover {
  background: var(--brand-teal) !important;
  transform: translateY(-1px);
}

button:disabled,
.generate-btn:disabled {
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
}

.secondary,
.reset-btn,
.mini-reset {
  background: var(--brand-white) !important;
  color: var(--brand-black) !important;
}

.secondary:hover,
.reset-btn:hover,
.mini-reset:hover {
  background: var(--color-gray-100) !important;
  color: var(--brand-black) !important;
}

.tabbtn.active,
.view-btn.active,
.option.selected,
.product.recommended {
  border-color: var(--brand-teal) !important;
  background: var(--brand-green) !important;
  color: var(--brand-black) !important;
}

.option {
  border: var(--border-width) var(--border-style) var(--brand-black) !important;
  border-radius: var(--radius) !important;
  background: var(--brand-white) !important;
  transition: border-color var(--transition-fast), transform var(--transition-fast), background-color var(--transition-fast);
}

.option:hover,
.product:hover {
  border-color: var(--brand-teal) !important;
  transform: translateY(-1px);
}

.form-row,
.row,
.grid-row,
.inputs,
.options,
.volume-grid,
.products,
.metrics,
.main-content {
  gap: var(--space-2) !important;
}

.form-group,
.input-group,
.field,
.row {
  min-width: 0;
}

.row {
  align-items: flex-start !important;
}

table {
  width: 100%;
  border-collapse: collapse !important;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--brand-white);
}

th,
td {
  padding: 11px 12px !important;
  border: var(--border-width) var(--border-style) var(--brand-black) !important;
}

th {
  background: var(--color-gray-100) !important;
  color: var(--brand-black) !important;
  font-weight: var(--font-weight-bold) !important;
}

.highlight {
  background: var(--brand-green) !important;
}

.warning,
.error {
  padding: var(--space-2);
  border: var(--border-width) var(--border-style) var(--brand-black);
  border-radius: var(--radius);
}

.warning {
  color: var(--brand-black) !important;
  background: #fff4e6 !important;
}

.error {
  color: var(--brand-red) !important;
  background: #fff5f5 !important;
}

.success,
.compatibility,
.recommended-badge {
  color: var(--brand-teal) !important;
}

.recommended-badge {
  display: inline-block;
  margin-left: var(--space-1);
  padding: 0.15rem 0.55rem;
  border: var(--border-width) var(--border-style) var(--brand-black);
  border-radius: var(--radius-full);
  background: var(--brand-green);
  color: var(--brand-black) !important;
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
}

.result,
.total,
.budget-display,
.result-amount,
.volume-value,
.metric .v,
.total-amount {
  color: var(--brand-blue) !important;
  font-weight: var(--font-weight-bold) !important;
}

canvas,
#threejs-container,
.canvas-wrap {
  max-width: 100% !important;
  border: var(--border-width) var(--border-style) var(--brand-black) !important;
  border-radius: var(--radius) !important;
  background: var(--brand-white) !important;
}

.hidden {
  display: none !important;
}

.adsense-banner {
  border: var(--border-width) dashed var(--color-gray-400) !important;
  border-radius: var(--radius) !important;
  background: var(--color-gray-50) !important;
}

@media (max-width: 760px) {
  body {
    max-width: calc(100% - (2 * var(--space-2)));
    padding-top: var(--space-3) !important;
  }

  .container,
  .wrap,
  .controls,
  .bottom-controls,
  .question,
  .input-section,
  .about-calculator,
  .info,
  .explanation,
  #problematic,
  #recommendations,
  .targets,
  .card,
  .result-section,
  .results,
  .report,
  .component,
  .viewer-panel,
  .controls-panel {
    padding: var(--space-2) !important;
  }

  .row,
  .form-row,
  .grid-row,
  .main-content {
    display: grid !important;
    grid-template-columns: 1fr !important;
  }
}

.about-calculator h3 {
  margin-top: var(--space-3);
  margin-bottom: var(--space-1);
  font-size: 1.1rem;
}

.about-calculator .faq-list {
  margin: 0;
  padding-left: 1.25rem;
}

.about-calculator .faq-list li {
  margin-bottom: var(--space-2);
}

.seo-intro {
  margin-bottom: var(--space-3);
}