/* ============================================================
   GSi — Gunnar Stone Inc. | Main Stylesheet
   Controls Engineering for the AI Era
   ============================================================ */

/* ── CSS Custom Properties ──────────────────────────────────── */
:root {
  /* Color palette — derived from GSi brand logo (red + dark navy) */
  --color-bg:          #0d1020;
  --color-surface:     #141828;
  --color-elevated:    #1c2238;
  --color-border:      #2d3561;
  --color-accent:      #d42424;
  --color-accent-hover:#b81e1e;
  --color-accent-dim:  rgba(212, 36, 36, 0.12);
  --color-text:        #f9fafb;
  --color-muted:       #9ca3af;
  --color-muted-dark:  #6b7280;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;

  /* Spacing scale */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 72px;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.6);
  --shadow-accent: 0 0 24px rgba(212,36,36,0.2);
}

/* ── Reset & Base ────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul, ol {
  list-style: none;
}

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

input, textarea, select {
  font-family: inherit;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.01em;
}

/* ── Layout Utilities ────────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.section {
  padding-block: var(--space-20);
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: all var(--transition-base);
  white-space: nowrap;
  cursor: pointer;
  line-height: 1;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--shadow-accent);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 0 32px rgba(212,36,36,0.35);
  transform: translateY(-1px);
}

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

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-dim);
  transform: translateY(-1px);
}

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

.btn-sm {
  padding: 0.5rem 1.125rem;
  font-size: 0.875rem;
}

/* ── Navigation ──────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(13, 16, 32, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.nav-logo {
  display: flex;
  align-items: center;
  transition: opacity var(--transition-fast);
}

.nav-logo:hover {
  opacity: 0.85;
}

.nav-logo-img {
  height: 56px;
  width: auto;
  display: block;
}

.nav-logo-text {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-left: 0.625rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-muted);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-cta {
  margin-left: var(--space-4);
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  cursor: pointer;
  background: none;
  border: none;
  padding: var(--space-2);
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

.nav-hamburger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.is-open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-hamburger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav drawer */
.nav-mobile {
  display: none;
  position: absolute;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-6);
  flex-direction: column;
  gap: var(--space-4);
  box-shadow: var(--shadow-md);
}

.nav-mobile.is-open {
  display: flex;
}

.nav-mobile .nav-link {
  font-size: 1.0625rem;
  color: var(--color-text);
  padding-block: var(--space-2);
  border-bottom: 1px solid var(--color-elevated);
}

.nav-mobile .nav-link:last-of-type {
  border-bottom: none;
}

.nav-mobile .btn {
  margin-top: var(--space-2);
  width: 100%;
}

/* ── Hero Section ────────────────────────────────────────────── */
.hero {
  position: relative;
  padding-top: var(--space-12);
  padding-bottom: var(--space-16);
  overflow: hidden;
  isolation: isolate; /* establish a stacking context so z-index children are scoped */
}

/* Subtle grid background */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(212,36,36,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212,36,36,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: -1;
}

/* Radial glow */
.hero::after {
  content: "";
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(
    ellipse at center,
    rgba(212,36,36,0.08) 0%,
    transparent 70%
  );
  pointer-events: none;
  z-index: -1;
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 860px;
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-6);
  padding: var(--space-2) var(--space-4);
  border: 1px solid rgba(212,36,36,0.3);
  border-radius: 100px;
  background: var(--color-accent-dim);
}

.hero-headline {
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  line-height: 1.1;
}

.hero-headline .accent {
  color: var(--color-accent);
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.1875rem);
  color: var(--color-muted);
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-10);
  line-height: 1.7;
}

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

/* ── Stats Bar ───────────────────────────────────────────────── */
.stats-bar {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-8);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-block: var(--space-4);
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: var(--color-border);
}

.stat-number {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ── Services Section ────────────────────────────────────────── */
.services {
  padding-block: var(--space-24);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.section-subtitle {
  font-size: 1.0625rem;
  color: var(--color-muted);
  max-width: 560px;
  margin-inline: auto;
  line-height: 1.7;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.services-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.service-step-number {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  opacity: 0.8;
  margin-bottom: var(--space-4);
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.service-card:hover {
  border-color: rgba(212,36,36,0.4);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(212,36,36,0.08);
}

.service-card:hover::before {
  opacity: 1;
}

.service-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  background: var(--color-accent-dim);
  border: 1px solid rgba(212,36,36,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-6);
  transition: all var(--transition-base);
}

.service-card:hover .service-icon {
  background: rgba(212,36,36,0.2);
  border-color: rgba(212,36,36,0.5);
}

.service-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.service-desc {
  font-size: 0.9375rem;
  color: var(--color-muted);
  line-height: 1.7;
}

/* ── GSi Difference Section ──────────────────────────────────── */
.difference {
  padding-block: var(--space-24);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.difference-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.difference-left .section-eyebrow {
  text-align: left;
}

.difference-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.difference-body {
  font-size: 1.0625rem;
  color: var(--color-muted);
  line-height: 1.75;
}

.difference-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.difference-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding: var(--space-5);
  background: var(--color-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.difference-item:hover {
  border-color: rgba(212,36,36,0.35);
  background: rgba(212,36,36,0.04);
}

.difference-check {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-accent-dim);
  border: 1.5px solid rgba(212,36,36,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
}

.difference-check svg {
  width: 13px;
  height: 13px;
  stroke: var(--color-accent);
  stroke-width: 2.5;
  fill: none;
}

.difference-item-text {
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.55;
  font-weight: 500;
}

/* ── Engagement Section ──────────────────────────────────────── */
.engagement {
  padding-block: var(--space-24);
}

.engagement-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.engagement-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: all var(--transition-base);
  position: relative;
}

.engagement-card:hover {
  border-color: rgba(212,36,36,0.4);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.engagement-card.featured {
  border-color: rgba(212,36,36,0.5);
  background: linear-gradient(
    135deg,
    var(--color-surface) 0%,
    rgba(212,36,36,0.05) 100%
  );
}

.engagement-card.featured::before {
  content: "Most Popular";
  position: absolute;
  top: -1px;
  right: var(--space-6);
  background: var(--color-accent);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.engagement-number {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  opacity: 0.7;
}

.engagement-title {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.engagement-desc {
  font-size: 0.9375rem;
  color: var(--color-muted);
  line-height: 1.7;
  flex: 1;
}

.engagement-action {
  margin-top: var(--space-2);
}

.engagement-action .btn {
  width: 100%;
}

/* ── Stub Page Hero ──────────────────────────────────────────── */
.page-hero {
  padding-block: var(--space-20);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(212,36,36,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212,36,36,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

.page-hero-content {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.page-hero-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

.page-hero-sub {
  font-size: 1.0625rem;
  color: var(--color-muted);
  line-height: 1.7;
}

.page-hero-sub a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-hero-sub a:hover {
  color: var(--color-accent-hover);
}

.page-content {
  padding-block: var(--space-16);
}

/* ── Contact Page ────────────────────────────────────────────── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: var(--space-16);
  align-items: start;
}

.contact-info-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.contact-info-sub {
  font-size: 1.0625rem;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.contact-direct {
  padding: var(--space-5);
  background: var(--color-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: 0.9375rem;
  color: var(--color-muted);
}

.contact-direct a {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.contact-direct a:hover {
  color: var(--color-accent-hover);
}

/* Contact Form */
.contact-form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-muted);
  letter-spacing: 0.02em;
}

.form-input,
.form-textarea {
  background: var(--color-elevated);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  color: var(--color-text);
  font-size: 0.9375rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-muted-dark);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(212,36,36,0.12);
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
  line-height: 1.6;
}

.hp-field {
  position: absolute;
  left: -9999px;
  top: -9999px;
  opacity: 0;
  pointer-events: none;
}

.captcha-input {
  max-width: 120px;
}

.form-submit {
  margin-top: var(--space-2);
}

.form-submit .btn {
  width: 100%;
  padding-block: 0.875rem;
  font-size: 1rem;
}

/* Flash messages */
.flash-messages {
  margin-bottom: var(--space-6);
}

.flash {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 500;
}

.flash-success {
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.3);
  color: #6ee7b7;
}

.flash-error {
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.3);
  color: #fca5a5;
}

/* ── Footer ──────────────────────────────────────────────────── */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-16);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid var(--color-border);
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  margin-bottom: var(--space-4);
  transition: opacity var(--transition-fast);
}

.footer-logo:hover {
  opacity: 0.85;
}

.footer-logo-img {
  height: 56px;
  width: auto;
  border-radius: var(--radius-sm);
  display: block;
}

.footer-desc {
  font-size: 0.9375rem;
  color: var(--color-muted);
  line-height: 1.7;
  max-width: 300px;
}

.footer-heading {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted-dark);
  margin-bottom: var(--space-5);
}

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

.footer-link {
  font-size: 0.9375rem;
  color: var(--color-muted);
  transition: color var(--transition-fast);
}

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

.footer-contact-item {
  font-size: 0.9375rem;
  color: var(--color-muted);
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  line-height: 1.5;
}

.footer-contact-item a {
  color: var(--color-muted);
  transition: color var(--transition-fast);
}

.footer-contact-item a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  padding-block: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copy {
  font-size: 0.875rem;
  color: var(--color-muted-dark);
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--color-muted-dark);
  font-style: italic;
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .difference-grid {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

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

  .footer-grid > :first-child {
    grid-column: 1 / -1;
  }

  .footer-grid > :nth-child(4) {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  /* Nav */
  .nav-links {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  /* Hero */
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  /* Stats */
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .stat-item:not(:last-child)::after {
    display: none;
  }

  .stat-item {
    border-bottom: 1px solid var(--color-border);
  }

  .stat-item:last-child {
    border-bottom: none;
  }

  /* Services */
  .services-grid,
  .services-grid-3 {
    grid-template-columns: 1fr;
  }

  /* Engagement */
  .engagement-grid {
    grid-template-columns: 1fr;
  }

  /* Form */
  .form-row {
    grid-template-columns: 1fr;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-grid > :first-child {
    grid-column: auto;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding-inline: var(--space-4);
  }

  .service-card,
  .engagement-card,
  .contact-form-card {
    padding: var(--space-6);
  }
}