/* =============================================================================
   Iron Mind AI — Main Stylesheet
   Brandbook ref: docs/brandbook.md
   Dark mode only. No light mode.
   ============================================================================= */

/* =============================================================================
   1. RESET & BASE
   ============================================================================= */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* =============================================================================
   2. CSS CUSTOM PROPERTIES (Brandbook: Color System, Typography, Spacing)
   ============================================================================= */

:root {
  /* Colors */
  --color-bg-primary: #0E0E0E;
  --color-bg-surface: #161616;
  --color-bg-elevated: #1C1C1C;
  --color-accent: #E87C2E;
  --color-accent-hover: #F08C3E;
  --color-accent-subtle: rgba(232, 124, 46, 0.12);
  --color-text-primary: #FFFFFF;
  --color-text-secondary: #E8EAED;
  --color-text-muted: #888888;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.16);

  /* Typography */
  --font-display: 'Barlow Condensed', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;
  --space-8: 128px;

  /* Border radius */
  --radius-sm: 3px;
  --radius-md: 4px;
  --radius-lg: 8px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease-out;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 64px;
}

/* =============================================================================
   3. SKIP LINK (Accessibility)
   ============================================================================= */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-2);
  background: var(--color-accent);
  color: #0E0E0E;
  padding: var(--space-1) var(--space-2);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: var(--radius-sm);
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-1);
}

/* =============================================================================
   4. NAVIGATION (Brandbook: Component Patterns > Navigation)
   ============================================================================= */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
}

.nav__inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

/* Logo */
.nav__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.nav__logo img {
  height: 40px;
  width: auto;
}

/* Nav links */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav__link {
  position: relative;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  padding-bottom: 4px;
  white-space: nowrap;
}

/* Amber underline — slides in from left on hover/active */
.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-accent);
  transition: width var(--transition-base);
}

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

.nav__link:hover::after,
.nav__link.is-active::after {
  width: 100%;
}

.nav__link.is-active {
  color: var(--color-text-primary);
}

/* CTA button in nav */
.nav__cta {
  flex-shrink: 0;
}

/* Hamburger button (mobile only) */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  cursor: pointer;
  background: none;
  border: none;
}

.nav__hamburger-line {
  display: block;
  width: 22px;
  height: 1.5px;
  background-color: var(--color-text-secondary);
  transition: transform var(--transition-base), opacity var(--transition-fast);
  transform-origin: center;
}

/* Hamburger open state */
.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile nav overlay */
.nav__mobile-overlay {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
  z-index: 99;
  flex-direction: column;
  padding: var(--space-4);
  gap: var(--space-3);
  overflow-y: auto;
}

.nav__mobile-overlay.is-open {
  display: flex;
}

.nav__mobile-link {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-fast);
}

.nav__mobile-link:hover,
.nav__mobile-link.is-active {
  color: var(--color-text-primary);
}

/* =============================================================================
   5. LAYOUT UTILITIES
   ============================================================================= */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.section {
  padding: var(--space-7) 0;
}

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

.section--full {
  padding: var(--space-8) 0;
}

/* Section label (01, 02, 03... in amber) */
.section-label {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

/* Section heading */
.section-heading {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-primary);
  line-height: 1.05;
  margin-bottom: var(--space-5);
}

.section-subheading {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 600px;
  margin-bottom: var(--space-5);
}

/* =============================================================================
   6. BUTTONS (Brandbook: Component Patterns > Buttons)
   ============================================================================= */

/* Primary button — amber, dark text, one per viewport */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: filter var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn--primary {
  background-color: var(--color-accent);
  color: #0E0E0E;
  border: 1px solid transparent;
}

.btn--primary:hover {
  filter: brightness(1.08);
}

/* Ghost button — amber border, amber text, transparent bg */
.btn--ghost {
  background-color: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.btn--ghost:hover {
  background-color: var(--color-accent-subtle);
}

/* Text link style */
.btn--text {
  padding: 0;
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  border-radius: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn--text:hover {
  color: var(--color-text-primary);
  filter: none;
}

/* =============================================================================
   7. HERO SECTION (Section 01)
   ============================================================================= */

.hero {
  position: relative;
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: var(--space-5) var(--space-4);
}

/* No texture — clean dark background only */
.hero::before {
  display: none;
}

.hero__watermark {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  max-width: 900px;
  pointer-events: none;
  z-index: 0;
  opacity: 0.015;
}

.hero__watermark img {
  width: 100%;
  height: auto;
  display: block;
}

/* Radial glow at center */
.hero::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(232, 124, 46, 0.04) 0%, transparent 65%);
  pointer-events: none;
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
}

.hero__headline {
  font-family: var(--font-display);
  font-size: 80px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-text-primary);
  line-height: 1.05;
  margin-bottom: var(--space-3);
}

.hero__headline--aside {
  display: block;
  font-size: 58px;
  color: var(--color-text-primary);
  letter-spacing: 0.02em;
}

/* Amber accent line under headline */
.hero__accent-line {
  width: 60px;
  height: 2px;
  background-color: var(--color-accent);
  margin: 0 auto var(--space-4);
}

.hero__subline {
  font-family: var(--font-body);
  font-size: 20px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 620px;
  margin: 0 auto var(--space-5);
}

/* Page-load stagger animation classes */
.hero__headline,
.hero__accent-line,
.hero__subline,
.hero__cta {
  opacity: 0;
  transform: translateY(12px);
}

.hero__headline.anim-in,
.hero__accent-line.anim-in,
.hero__subline.anim-in,
.hero__cta.anim-in {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

/* =============================================================================
   8. SERVICE TILES (Section 02 — What We Build)
   ============================================================================= */

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.service-tile {
  background-color: var(--color-bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.service-tile:hover {
  background-color: var(--color-bg-elevated);
  border-color: rgba(232, 124, 46, 0.3);
}

.service-tile__icon {
  width: 24px;
  height: 24px;
  margin-bottom: var(--space-3);
  color: var(--color-accent);
  flex-shrink: 0;
}

.service-tile__title {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.service-tile__desc {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 300;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* =============================================================================
   9. PROCESS STEPS (Section 03 — How We Work)
   ============================================================================= */

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-5);
  position: relative;
}

/* Connector line between steps */
.process-steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(12.5% + 8px);
  right: calc(12.5% + 8px);
  height: 1px;
  background: var(--color-border);
  z-index: 0;
}

.process-step {
  position: relative;
  z-index: 1;
}

.process-step__number {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background-color: var(--color-bg-primary);
  margin-bottom: var(--space-3);
  letter-spacing: 0;
}

.process-step__title {
  font-family: var(--font-body);
  font-size: 22px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.process-step__desc {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 300;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* =============================================================================
   10. CASE STUDY CARDS (Section 04 — Recent Work)
   ============================================================================= */

.case-studies {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.case-study-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-5) var(--space-5) calc(var(--space-5) + 3px);
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-6);
  align-items: start;
  position: relative;
  transition: border-color var(--transition-base);
}

/* Left amber accent bar */
.case-study-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 3px;
  background-color: var(--color-accent);
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.case-study-card:hover {
  border-color: var(--color-border-hover);
}

.case-study-card__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.case-study-card__label {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.case-study-card__project {
  font-family: var(--font-body);
  font-size: 22px;
  font-weight: 500;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.case-study-card__metric {
  font-family: var(--font-display);
  font-size: 52px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  letter-spacing: 0.02em;
}

.case-study-card__metric-label {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.case-study-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-1);
}

.case-study-card__desc {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.case-study-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: var(--space-2);
}

.tag {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

/* Amber category tag variant */
.tag--amber {
  color: var(--color-accent);
  background-color: var(--color-accent-subtle);
  border-color: rgba(232, 124, 46, 0.2);
}

/* =============================================================================
   11. TESTIMONIALS (Section 05)
   ============================================================================= */

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.testimonial-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: border-color var(--transition-base);
}

.testimonial-card:hover {
  border-color: var(--color-border-hover);
}

.testimonial-card__quote-mark {
  font-family: var(--font-display);
  font-size: 80px;
  font-weight: 700;
  color: var(--color-accent);
  opacity: 0.3;
  line-height: 0.7;
  user-select: none;
}

.testimonial-card__text {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 300;
  color: var(--color-text-secondary);
  line-height: 1.7;
  flex: 1;
}

.testimonial-card__attribution {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-border);
}

.testimonial-card__name {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-primary);
}

.testimonial-card__title {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 300;
  color: var(--color-text-muted);
}

/* =============================================================================
   12. ABOUT SECTION (Section 06)
   ============================================================================= */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
  align-items: start;
  margin-top: var(--space-5);
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.about-text p {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.about-intro {
  font-size: 22px !important;
  font-weight: 500 !important;
  color: var(--color-text-primary) !important;
  margin-bottom: var(--space-1);
}

.about-photo {
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4 / 5;
  position: relative;
}

.about-photo::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(14, 14, 14, 0.2);
  border-radius: var(--radius-md);
}

.about-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
  filter: grayscale(100%) brightness(0.95);
}

/* Placeholder photo block */
.about-photo-placeholder {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  aspect-ratio: 4 / 5;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-1);
}

.about-photo-placeholder__label {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

/* =============================================================================
   13. CTA / CONTACT SECTION (Section 07)
   ============================================================================= */

.cta-section {
  background-color: var(--color-bg-surface);
  text-align: center;
  padding: var(--space-8) var(--space-4);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.cta-section__heading {
  font-family: var(--font-display);
  font-size: 52px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.cta-section__subline {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 520px;
  margin: 0 auto var(--space-5);
}

.cta-section__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-3);
}

.cta-section__footnote {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 300;
  color: var(--color-text-muted);
}

/* === CONTACT FORM ===
   Inline contact form within .cta-section (Section 07, #contact).
   Brandbook: dark elevated inputs, amber focus ring, DM Sans labels.
   =========================================================== */

.contact-form {
  max-width: 640px;
  margin: 0 auto var(--space-4);
  text-align: left;
}

/* Two-column row for short fields */
.contact-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.contact-form__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

/* Remove bottom margin when field is inside a row (row handles it) */
.contact-form__row .contact-form__field {
  margin-bottom: 0;
}

.contact-form__label {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  display: block;
}

.contact-form__input {
  display: block;
  width: 100%;
  box-sizing: border-box;
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.5;
  padding: 12px var(--space-2);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.contact-form__input::placeholder {
  color: var(--color-text-muted);
  opacity: 0.7;
}

.contact-form__input:hover {
  border-color: var(--color-border-hover);
}

.contact-form__input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(232, 124, 46, 0.25);
}

/* Invalid state (set via JS after validation failure) */
.contact-form__input.is-invalid {
  border-color: #c0392b;
  box-shadow: 0 0 0 2px rgba(192, 57, 43, 0.2);
}

.contact-form__textarea {
  resize: vertical;
  min-height: 120px;
}

/* Inline field error text */
.contact-form__error {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 400;
  color: #e05252;
  display: none;
  margin-top: 2px;
}

.contact-form__error.is-visible {
  display: block;
}

/* Submit button — full width on all viewports within the form */
.contact-form__submit {
  width: 100%;
  justify-content: center;
  margin-top: var(--space-1);
}

/* Error banner (network / server error) */
.contact-form__error-banner {
  margin-top: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background-color: rgba(192, 57, 43, 0.12);
  border: 1px solid rgba(192, 57, 43, 0.3);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 14px;
  color: #e05252;
  text-align: center;
}

.contact-form__error-banner a {
  color: var(--color-accent);
  text-decoration: underline;
}

/* Success message */
.contact-form__success {
  max-width: 640px;
  margin: 0 auto var(--space-4);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-5) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-elevated);
}

.contact-form__success[hidden] {
  display: none;
}

.contact-form__success-icon {
  color: var(--color-accent);
  flex-shrink: 0;
}

.contact-form__success-text {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 400;
  color: var(--color-text-secondary);
  text-align: center;
  margin: 0;
}

/* =============================================================================
   14. BLOG TEASER (Recent Posts, above footer)
   ============================================================================= */

.blog-teaser {
  padding: var(--space-7) 0;
  border-top: 1px solid var(--color-border);
}

.blog-teaser__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
  gap: var(--space-2);
}

.blog-teaser__label {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

.blog-teaser__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

/* =============================================================================
   15. BLOG POST CARDS (shared: teaser + blog index)
   ============================================================================= */

.post-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: border-color var(--transition-base), background-color var(--transition-base);
  text-decoration: none;
  color: inherit;
}

.post-card:hover {
  background-color: var(--color-bg-elevated);
  border-color: rgba(232, 124, 46, 0.3);
}

.post-card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.post-card__category {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.post-card__title {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 500;
  color: var(--color-text-primary);
  line-height: 1.4;
}

.post-card__excerpt {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 300;
  color: var(--color-text-muted);
  line-height: 1.6;
  flex: 1;
}

.post-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
  gap: var(--space-1);
}

.post-card__meta {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 300;
  color: var(--color-text-muted);
}

.post-card__read-link {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.post-card:hover .post-card__read-link {
  color: var(--color-text-primary);
}

/* =============================================================================
   16. FOOTER (Brandbook: Component Patterns)
   ============================================================================= */

.footer {
  background-color: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-6) 0 var(--space-4);
}

.footer__main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-3);
}

.footer__logo img {
  height: auto;
  width: 80px;
}

.footer__nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.footer__nav-link {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer__nav-link:hover {
  color: var(--color-text-primary);
}

.footer__copy {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 300;
  color: var(--color-text-muted);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer__tagline {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

/* =============================================================================
   17. BLOG PAGE (blog.html)
   ============================================================================= */

.blog-header {
  padding: var(--space-7) 0 var(--space-5);
}

.blog-header__heading {
  font-family: var(--font-display);
  font-size: 64px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.blog-header__subline {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 400;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 560px;
}

/* Category filter bar */
.category-filter {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.category-filter__btn {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  padding: 7px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  background: none;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
  text-decoration: none;
  display: inline-block;
}

.category-filter__btn:hover {
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.category-filter__btn.is-active {
  color: var(--color-accent);
  border-color: rgba(232, 124, 46, 0.3);
  background-color: var(--color-accent-subtle);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-7);
}

/* =============================================================================
   18. BLOG POST PAGE (blog_post.html)
   ============================================================================= */

.post-layout {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-4);
}

.post-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
  transition: color var(--transition-fast);
}

.post-back:hover {
  color: var(--color-text-primary);
}

.post-header {
  margin-bottom: var(--space-5);
}

.post-header__category {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.post-header__title {
  font-family: var(--font-display);
  font-size: 52px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-text-primary);
  line-height: 1.05;
  margin-bottom: var(--space-3);
}

.post-header__meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 300;
  color: var(--color-text-muted);
}

.post-header__meta-divider {
  width: 3px;
  height: 3px;
  background-color: var(--color-text-muted);
  border-radius: 50%;
}

/* Post content typography */
.post-content {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.post-content h2 {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-primary);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.post-content h3 {
  font-family: var(--font-body);
  font-size: 22px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-top: var(--space-5);
  margin-bottom: var(--space-2);
}

.post-content p {
  margin-bottom: var(--space-3);
}

.post-content ul,
.post-content ol {
  margin-bottom: var(--space-3);
  padding-left: var(--space-3);
}

.post-content ul {
  list-style: disc;
}

.post-content ol {
  list-style: decimal;
}

.post-content li {
  margin-bottom: var(--space-1);
  color: var(--color-text-secondary);
}

.post-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

.post-content a:hover {
  color: var(--color-accent-hover);
}

.post-content strong {
  font-weight: 500;
  color: var(--color-text-primary);
}

.post-content em {
  font-style: italic;
  color: var(--color-text-secondary);
}

.post-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding: var(--space-3) var(--space-4);
  margin: var(--space-4) 0;
  background-color: var(--color-bg-surface);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.post-content blockquote p {
  margin-bottom: 0;
  font-size: 17px;
  color: var(--color-text-secondary);
}

/* Code blocks — JetBrains Mono on elevated bg */
.post-content pre {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  overflow-x: auto;
  margin: var(--space-4) 0;
}

.post-content code {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text-secondary);
}

.post-content p code,
.post-content li code {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 13px;
}

/* Amber-tinted keywords in code — simple approximation */
.post-content .kw { color: var(--color-accent); }
.post-content .str { color: #7ECA9C; }
.post-content .cm { color: var(--color-text-muted); font-style: italic; }

/* Post end CTA */
.post-end-cta {
  margin-top: var(--space-8);
  padding: var(--space-6) var(--space-5);
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: center;
}

.post-end-cta__heading {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.post-end-cta__subline {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

/* =============================================================================
   19. SCROLL REVEAL ANIMATION
   ============================================================================= */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for grid children */
.reveal-stagger > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger > *:nth-child(2) { transition-delay: 60ms; }
.reveal-stagger > *:nth-child(3) { transition-delay: 120ms; }
.reveal-stagger > *:nth-child(4) { transition-delay: 180ms; }
.reveal-stagger > *:nth-child(5) { transition-delay: 240ms; }
.reveal-stagger > *:nth-child(6) { transition-delay: 300ms; }

/* =============================================================================
   20. FOCUS STATES (Accessibility)
   ============================================================================= */

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* =============================================================================
   21. RESPONSIVE — TABLET (768px–1024px)
   ============================================================================= */

@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .process-steps::before {
    display: none;
  }

  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .case-study-card {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .case-study-card__metric {
    font-size: 40px;
  }

  .about-grid {
    gap: var(--space-5);
  }

  .blog-teaser__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* =============================================================================
   22. RESPONSIVE — MOBILE (< 768px)
   ============================================================================= */

@media (max-width: 767px) {
  :root {
    --nav-height: 56px;
  }

  /* Nav */
  .nav__links,
  .nav__cta {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  /* Hero */
  .hero {
    padding: var(--space-6) var(--space-3);
    min-height: calc(100svh - var(--nav-height));
  }

  .hero__headline {
    font-size: 48px;
  }

  .hero__headline--aside {
    font-size: 48px;
  }

  .hero__subline {
    font-size: 16px;
  }

  /* Section heading */
  .section-heading {
    font-size: 32px;
  }

  .section {
    padding: var(--space-6) 0;
  }

  .container {
    padding: 0 var(--space-3);
  }

  /* Services */
  .services-grid {
    grid-template-columns: 1fr;
  }

  /* Process */
  .process-steps {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .process-steps::before {
    display: none;
  }

  /* Case studies */
  .case-study-card {
    grid-template-columns: 1fr;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-3) var(--space-4) calc(var(--space-3) + 3px);
  }

  .case-study-card__metric {
    font-size: 36px;
  }

  /* Testimonials */
  .testimonials-grid {
    grid-template-columns: 1fr;
    overflow-x: auto;
    display: flex;
    flex-direction: column;
  }

  /* About */
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .about-photo-placeholder {
    aspect-ratio: 16 / 9;
  }

  /* CTA section */
  .cta-section {
    padding: var(--space-6) var(--space-3);
  }

  .cta-section__heading {
    font-size: 36px;
  }

  /* Contact form — collapse two-column rows to single column on mobile */
  .contact-form__row {
    grid-template-columns: 1fr;
  }

  /* Blog teaser */
  .blog-teaser__grid {
    grid-template-columns: 1fr;
  }

  /* Footer */
  .footer__main {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .footer__nav {
    gap: var(--space-3);
  }

  /* Blog header */
  .blog-header__heading {
    font-size: 42px;
  }

  /* Blog grid */
  .blog-grid {
    grid-template-columns: 1fr;
  }

  /* Post header */
  .post-header__title {
    font-size: 36px;
  }

  .post-layout {
    padding: var(--space-4) var(--space-3);
  }

  .post-content {
    font-size: 16px;
  }
}

/* =============================================================================
   23. REDUCED MOTION (Accessibility — wraps all animations)
   ============================================================================= */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal,
  .hero__headline,
  .hero__accent-line,
  .hero__subline,
  .hero__cta {
    opacity: 1;
    transform: none;
    transition: none;
  }
}