/* ===== DESIGN TOKENS ===== */
:root {
  /* Type Scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);

  /* Spacing (4px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;

  /* Fonts */
  --font-body: 'Switzer', 'Helvetica Neue', sans-serif;
  --font-display: 'Switzer', 'Helvetica Neue', sans-serif;
}

/* ===== CUSTOM PALETTE — Derived from IR logo ===== */
/* Warm terracotta + deep teal, serious & grounded */

:root,
[data-theme='light'] {
  /* Surfaces — cool warm gray, not beige */
  --color-bg: #F5F4F1;
  --color-surface: #FFFFFF;
  --color-surface-2: #FAFAF8;
  --color-surface-offset: #EEEDEA;
  --color-surface-offset-2: #E5E4E0;
  --color-surface-dynamic: #DDDCD8;
  --color-divider: #D1D0CC;
  --color-border: #C5C4C0;

  /* Text */
  --color-text: #1A1A18;
  --color-text-muted: #5C5C58;
  --color-text-faint: #9A9A96;
  --color-text-inverse: #F5F4F1;

  /* Primary — deep teal from logo arrow */
  --color-primary: #0E6B6E;
  --color-primary-hover: #0A5254;
  --color-primary-active: #073C3E;
  --color-primary-highlight: #D0E5E6;

  /* Accent — terracotta from logo 'i' */
  --color-accent: #C45A2D;
  --color-accent-hover: #A34A24;
  --color-accent-active: #82391A;

  /* Semantic */
  --color-error: #A13544;
  --color-warning: #964219;
  --color-success: #437A22;

  /* Shadows (warm-tinted) */
  --shadow-sm: 0 1px 2px oklch(0.2 0.01 80 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.2 0.01 80 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.2 0.01 80 / 0.12);
}

/* DARK MODE */
[data-theme='dark'] {
  --color-bg: #141413;
  --color-surface: #1C1C1A;
  --color-surface-2: #222220;
  --color-surface-offset: #1E1E1C;
  --color-surface-offset-2: #262624;
  --color-surface-dynamic: #2E2E2C;
  --color-divider: #2A2A28;
  --color-border: #3A3A38;

  --color-text: #D0CFCC;
  --color-text-muted: #8A8A86;
  --color-text-faint: #5A5A58;
  --color-text-inverse: #1A1A18;

  --color-primary: #5BA3A6;
  --color-primary-hover: #3D8C8F;
  --color-primary-active: #2A7578;
  --color-primary-highlight: #1E3536;

  --color-accent: #D67A52;
  --color-accent-hover: #C46A42;
  --color-accent-active: #B05A32;

  --color-error: #DD6974;
  --color-warning: #BB653B;
  --color-success: #6DAA45;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.3);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #141413;
    --color-surface: #1C1C1A;
    --color-surface-2: #222220;
    --color-surface-offset: #1E1E1C;
    --color-surface-offset-2: #262624;
    --color-surface-dynamic: #2E2E2C;
    --color-divider: #2A2A28;
    --color-border: #3A3A38;
    --color-text: #D0CFCC;
    --color-text-muted: #8A8A86;
    --color-text-faint: #5A5A58;
    --color-text-inverse: #1A1A18;
    --color-primary: #5BA3A6;
    --color-primary-hover: #3D8C8F;
    --color-primary-active: #2A7578;
    --color-primary-highlight: #1E3536;
    --color-accent: #D67A52;
    --color-accent-hover: #C46A42;
    --color-accent-active: #B05A32;
    --color-error: #DD6974;
    --color-warning: #BB653B;
    --color-success: #6DAA45;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
    --shadow-md: 0 4px 12px oklch(0 0 0 / 0.3);
    --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.4);
  }
}

/* ===== LAYOUT ===== */
.container {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.container--wide {
  max-width: var(--content-wide);
}

.container--narrow {
  max-width: var(--content-narrow);
}

/* ===== SKIP LINK ===== */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: 100;
  text-decoration: none;
  font-size: var(--text-sm);
}
.skip-link:focus {
  top: var(--space-2);
}

/* ===== HEADER ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.08);
  transition: box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.header--scrolled {
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-3);
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.header__logo svg,
.header__logo-mark {
  width: 36px;
  height: auto;
  flex-shrink: 0;
  display: block;
}

.header__logo-mark {
  width: 38px;
}

.header__logo-text {
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.header__logo-text span {
  font-weight: 400;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.header__nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 450;
  letter-spacing: 0.01em;
}

.header__nav a:hover {
  color: var(--color-text);
}

.header__theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}

.header__theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* Mobile nav */
.header__menu-btn {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
}

.header__menu-btn:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

@media (max-width: 640px) {
  .header__menu-btn {
    display: flex;
  }
  .header__nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4);
    gap: var(--space-4);
  }
  .header__nav.is-open {
    display: flex;
  }
  .header__nav a {
    font-size: var(--text-base);
    padding: var(--space-2) 0;
  }
}

/* ===== HERO ===== */
.hero {
  padding: clamp(var(--space-16), 10vw, var(--space-32)) 0 clamp(var(--space-12), 8vw, var(--space-24));
  border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.06);
}

.hero__content {
  max-width: 720px;
}

.hero__tagline {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.hero__heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  letter-spacing: -0.02em;
}

.hero__description {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 56ch;
  line-height: 1.65;
}

/* ===== SECTIONS ===== */
.section {
  padding: clamp(var(--space-12), 6vw, var(--space-24)) 0;
}

.section--alt {
  background: var(--color-surface);
}

.section__label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section__heading {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  letter-spacing: -0.01em;
}

.section__text {
  color: var(--color-text-muted);
  max-width: 60ch;
  line-height: 1.65;
  margin-bottom: var(--space-6);
}

.section__text:last-child {
  margin-bottom: 0;
}

/* ===== PRINCIPLES / FOCUS AREAS ===== */
.principles {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-8);
}

@media (min-width: 640px) {
  .principles {
    grid-template-columns: 1fr 1fr;
  }
}

.principle {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-lg);
}

[data-theme='dark'] .principle,
:root:not([data-theme]) .principle {
  background: var(--color-surface-2);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .principle {
    background: var(--color-surface-2);
  }
}

.principle__title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  letter-spacing: 0.01em;
}

.principle__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===== PRODUCTS ===== */
.products-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-8);
}

@media (min-width: 640px) {
  .products-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.product-card {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
}

[data-theme='dark'] .product-card,
:root:not([data-theme]) .product-card {
  background: var(--color-surface-2);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .product-card {
    background: var(--color-surface-2);
  }
}

.product-card__icon {
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-5);
  color: var(--color-primary);
}

.product-card__name {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.product-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-6);
  flex-grow: 1;
}

.product-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
}

.product-card__link:hover {
  color: var(--color-primary-hover);
}

.product-card__link svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-interactive);
}

.product-card__link:hover svg {
  transform: translateX(3px);
}

/* ===== CONTACT / CTA ===== */
.contact {
  text-align: left;
}

.contact__email {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
  padding: var(--space-3) var(--space-6);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  margin-top: var(--space-6);
}

.contact__email:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.contact__email svg {
  width: 18px;
  height: 18px;
}

/* ===== DIVIDER ===== */
.divider {
  width: 48px;
  height: 2px;
  background: var(--color-accent);
  border: none;
  margin: var(--space-8) 0;
  opacity: 0.6;
}

/* ===== FOOTER ===== */
.footer {
  border-top: 1px solid oklch(from var(--color-text) l c h / 0.08);
  padding: var(--space-8) 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer__location {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ===== SCROLL REVEALS ===== */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== BUTTONS ===== */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  padding: 0.9rem 1.15rem;
  cursor: pointer;
  transition: background var(--transition-interactive), border-color var(--transition-interactive), color var(--transition-interactive), transform var(--transition-interactive);
}

.button:hover {
  transform: translateY(-1px);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.65;
  transform: none;
}

.button--primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.button--primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.button--secondary {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.button--secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.hero__note {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.6;
  margin-top: var(--space-5);
  max-width: 58ch;
}

.hero__note a {
  color: var(--color-primary);
}

.products-grid--three {
  grid-template-columns: 1fr;
}

@media (min-width: 860px) {
  .products-grid--three {
    grid-template-columns: repeat(3, 1fr);
  }
}

.trades-grid {
  align-items: stretch;
}

/* ===== LEAD FORM ===== */
.lead-form {
  max-width: 880px;
  margin-top: var(--space-8);
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}

[data-theme='dark'] .lead-form,
:root:not([data-theme]) .lead-form {
  background: var(--color-surface-2);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .lead-form {
    background: var(--color-surface-2);
  }
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 720px) {
  .form-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: 600;
}

.field--full {
  grid-column: 1 / -1;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font: inherit;
  font-weight: 400;
  padding: 0.85rem 0.95rem;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.field textarea {
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.16);
  outline: none;
}

.checkbox-group {
  border: 0;
  margin: var(--space-6) 0;
  padding: 0;
}

.checkbox-group legend {
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.checkbox-group label {
  align-items: center;
  color: var(--color-text-muted);
  display: flex;
  flex-direction: row;
  font-weight: 400;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.checkbox-group input {
  width: auto;
}

.form-actions {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.form-status {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.form-status.is-error {
  color: var(--color-error);
}

.form-fallback {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  line-height: 1.6;
  margin-top: var(--space-5);
}

.form-fallback a {
  color: var(--color-primary);
}

.thank-you {
  min-height: 60vh;
}