/* =============================================
   CSS Custom Properties
   ============================================= */
:root {
  --color-primary: #0a7ea4;
  --color-primary-dark: #085f7a;
  --color-text: #1a1a2e;
  --color-text-secondary: #4a4a6a;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f7fa;
  --color-border: #e2e8f0;
  --color-accent: #e8f4f8;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-hero: 3.5rem;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --transition: 0.2s ease;
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

ul, ol {
  list-style: none;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
}

a:hover {
  color: var(--color-primary-dark);
}

/* =============================================
   Skip to Content
   ============================================= */
.skip-to-content {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-xs) var(--space-sm);
  border-radius: 0 0 var(--border-radius) var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  z-index: 9999;
  transition: top var(--transition);
}

.skip-to-content:focus {
  top: 0;
  outline: 2px solid #fff;
  outline-offset: 2px;
}

/* =============================================
   Focus States
   ============================================= */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 2px;
}

/* =============================================
   Typography
   ============================================= */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.25;
  color: var(--color-text);
  font-weight: 700;
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  max-width: 72ch;
  margin-bottom: var(--space-sm);
}

p:last-child {
  margin-bottom: 0;
}

/* =============================================
   Layout & Containers
   ============================================= */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-sm);
}

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

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

.section__header {
  margin-bottom: var(--space-lg);
}

.section__title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-xs);
}

.section__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 60ch;
}

/* =============================================
   Header & Navigation
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

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

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.site-logo:hover {
  color: var(--color-primary);
}

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

.site-nav__list {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.site-nav__link {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: var(--space-xs) 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.site-nav__link:hover,
.site-nav__link.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius);
}

.hamburger:hover {
  background: var(--color-bg-alt);
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* =============================================
   Hero Section
   ============================================= */
.hero {
  padding-block: var(--space-2xl);
  background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-accent) 100%);
}

.hero__content {
  max-width: 780px;
}

.hero__name {
  font-size: var(--font-size-hero);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-xs);
}

.hero__title {
  font-size: var(--font-size-2xl);
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.hero__supporting {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  font-style: italic;
  margin-bottom: var(--space-md);
  max-width: 60ch;
}

.hero__description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 60ch;
  margin-bottom: var(--space-lg);
}

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

/* =============================================
   Buttons
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.625rem var(--space-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--border-radius);
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition),
    border-color var(--transition), box-shadow var(--transition);
  line-height: 1.4;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
}

.btn--secondary {
  background: var(--color-text);
  color: #fff;
  border-color: var(--color-text);
}

.btn--secondary:hover {
  background: #2d2d4a;
  border-color: #2d2d4a;
  color: #fff;
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn--sm {
  padding: 0.375rem var(--space-sm);
  font-size: 0.875rem;
}

.btn--lg {
  padding: 0.875rem var(--space-lg);
  font-size: var(--font-size-lg);
}

/* =============================================
   Strategy Highlights Tiles
   ============================================= */
.highlights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

.highlight-tile {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.highlight-tile:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.highlight-tile__icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
  display: block;
}

.highlight-tile__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.highlight-tile__desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  max-width: none;
  margin-bottom: 0;
}

/* =============================================
   Project Cards
   ============================================= */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.project-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.project-card__image {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  background: var(--color-bg-alt);
}

.project-card__body {
  padding: var(--space-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-card__role {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.project-card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.project-card__summary {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  flex: 1;
  max-width: none;
  margin-bottom: var(--space-sm);
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-sm);
}

.project-card__footer {
  margin-top: auto;
}

/* =============================================
   Tags / Badges
   ============================================= */
.tag {
  display: inline-block;
  padding: 0.2em 0.7em;
  font-size: 0.8125rem;
  font-weight: 500;
  border-radius: 100px;
  background: var(--color-accent);
  color: var(--color-primary-dark);
  white-space: nowrap;
}

.tag--muted {
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
}

/* Skill badge (resume) */
.badge {
  display: inline-block;
  padding: 0.25em 0.75em;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--border-radius);
  background: var(--color-bg-alt);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

/* =============================================
   Filter Buttons
   ============================================= */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

.filter-btn {
  padding: 0.4em 1em;
  font-size: 0.9375rem;
  font-weight: 500;
  border: 2px solid var(--color-border);
  border-radius: 100px;
  background: var(--color-bg);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
    border-color var(--transition);
}

.filter-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* =============================================
   Case Study Layout
   ============================================= */
.case-study-hero {
  background: var(--color-bg-alt);
  padding-block: var(--space-xl);
}

.case-study-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  align-items: center;
}

.case-study-hero__role {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
}

.case-study-hero__title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

.case-study-hero__summary {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 65ch;
  margin-bottom: var(--space-md);
}

.case-study-hero__image {
  width: 100%;
  border-radius: var(--border-radius-lg);
  margin-top: var(--space-lg);
  box-shadow: var(--shadow-lg);
}

.case-study-body {
  padding-block: var(--space-xl);
}

.case-study-body .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.case-study-section {
  border-top: 2px solid var(--color-border);
  padding-top: var(--space-lg);
}

.case-study-section:first-child {
  border-top: none;
  padding-top: 0;
}

.case-study-section__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.case-study-section p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  max-width: 70ch;
}

.responsibilities-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}

.responsibilities-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-xs);
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
}

.responsibilities-list li::before {
  content: "→";
  color: var(--color-primary);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 0.1em;
}

.tools-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}

.case-study-gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.case-study-gallery img {
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  width: 100%;
}

.case-study-gallery figcaption {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
  text-align: center;
}

.case-study-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  margin-top: var(--space-md);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* Loading / Error states */
.loading-state,
.error-state {
  text-align: center;
  padding: var(--space-2xl) var(--space-sm);
  color: var(--color-text-secondary);
}

.error-state {
  color: #b91c1c;
}

.spinner {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: var(--space-sm);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* =============================================
   Resume Layout
   ============================================= */
.resume-download-bar {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-sm);
}

.resume-download-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.resume-download-bar h1 {
  font-size: var(--font-size-3xl);
}

.resume-body {
  padding-block: var(--space-xl);
}

.resume-section {
  margin-bottom: var(--space-xl);
}

.resume-section:last-child {
  margin-bottom: 0;
}

.resume-section__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: var(--space-xs);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.resume-summary {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 70ch;
  line-height: 1.7;
}

.skills-group {
  margin-bottom: var(--space-md);
}

.skills-group__label {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.skills-group__badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.experience-item {
  margin-bottom: var(--space-lg);
  padding-left: var(--space-md);
  border-left: 3px solid var(--color-border);
}

.experience-item__header {
  margin-bottom: var(--space-xs);
}

.experience-item__company {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
}

.experience-item__title {
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  font-weight: 600;
}

.experience-item__dates {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.experience-item__bullets {
  list-style: disc;
  padding-left: var(--space-md);
  color: var(--color-text-secondary);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.experience-item__bullets li {
  font-size: var(--font-size-base);
  line-height: 1.6;
}

.education-item {
  margin-bottom: var(--space-md);
}

.education-item__degree {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
}

.education-item__school {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
}

/* =============================================
   Contact Form
   ============================================= */
.contact-page {
  padding-block: var(--space-xl);
}

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

.contact-intro__tagline {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.contact-intro__message {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  max-width: 55ch;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.contact-link {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
}

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

.contact-link__icon {
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.contact-social {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.form-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.35rem;
}

.form-label .required-mark {
  color: #b91c1c;
  margin-left: 2px;
}

.form-control {
  width: 100%;
  padding: 0.625rem var(--space-sm);
  font-size: var(--font-size-base);
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  transition: border-color var(--transition), box-shadow var(--transition);
  line-height: 1.5;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(10, 126, 164, 0.15);
}

.form-control.is-invalid {
  border-color: #b91c1c;
}

.form-control.is-invalid:focus {
  box-shadow: 0 0 0 3px rgba(185, 28, 28, 0.12);
}

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

.field-error {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.875rem;
  color: #b91c1c;
  font-weight: 500;
}

.form-success {
  display: none;
  background: #dcfce7;
  border: 1px solid #86efac;
  color: #166534;
  border-radius: var(--border-radius);
  padding: var(--space-md);
  margin-top: var(--space-md);
  font-weight: 500;
  text-align: center;
}

.form-success.visible {
  display: block;
}

/* =============================================
   Page Header (inner pages)
   ============================================= */
.page-header {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-xl);
}

.page-header__title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.page-header__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
  max-width: 60ch;
}

/* =============================================
   About Page
   ============================================= */
.about-page {
  padding-block: var(--space-xl);
}

.about-section {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.about-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.about-section__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.about-section p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 70ch;
  line-height: 1.75;
}

/* =============================================
   Footer
   ============================================= */
.site-footer {
  background: var(--color-text);
  color: #c8c8d8;
  padding-block: var(--space-xl);
}

.site-footer .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.footer-brand__name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  display: block;
  margin-bottom: var(--space-xs);
}

.footer-brand__tagline {
  font-size: 0.9375rem;
  color: #a0a0b8;
}

.footer-nav__heading {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #fff;
  margin-bottom: var(--space-sm);
}

.footer-nav__list {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem; /* row-gap column-gap */
}

.footer-nav__link {
  color: #fff;
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color var(--transition);
}

.footer-nav__link:hover,
.footer-nav__link:focus {
  color: #fff;
  text-decoration: underline;
}

.footer-contact__heading {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #fff;
  margin-bottom: var(--space-sm);
}

.footer-contact__email {
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.9375rem;
  display: block;
  margin-bottom: var(--space-sm);
}

.footer-contact__email:hover {
  color: #4dc3e8;
}

.footer-social {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.footer-social__link {
  color: #a0a0b8;
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 0.3em 0.8em;
  border: 1px solid #3a3a5a;
  border-radius: var(--border-radius);
  transition: color var(--transition), border-color var(--transition);
}

.footer-social__link:hover {
  color: #fff;
  border-color: #fff;
}

.footer-bottom {
  border-top: 1px solid #2d2d4a;
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  font-size: 0.875rem;
  color: #6a6a8a;
  text-align: center;
}

/* =============================================
   Responsive — 768px (Tablet)
   ============================================= */
@media (min-width: 768px) {
  h1 { font-size: var(--font-size-hero); }

  .hero__name { font-size: clamp(2.5rem, 6vw, var(--font-size-hero)); }

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

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

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

  .contact-grid {
    grid-template-columns: 1fr 1.5fr;
  }

  .site-footer .container {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .resume-download-bar .container {
    flex-wrap: nowrap;
  }
}

/* =============================================
   Responsive — 1024px (Desktop)
   ============================================= */
@media (min-width: 1024px) {
  .container {
    padding-inline: var(--space-lg);
  }

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

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

  .case-study-body .container {
    grid-template-columns: 1fr;
    max-width: 900px;
  }

  .site-footer .container {
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-xl);
  }
}

/* =============================================
   Mobile Nav (below 768px)
   ============================================= */
@media (max-width: 767px) {
  .hamburger {
    display: flex;
  }

  .site-nav__list {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    gap: 0;
    box-shadow: var(--shadow-md);
    z-index: 99;
  }

  .site-nav__list.open {
    display: flex;
  }

  .site-nav__link {
    display: block;
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--color-border);
    border-bottom-width: 0;
    border-bottom-color: transparent;
  }

  .site-nav__list li:not(:last-child) .site-nav__link {
    border-bottom: 1px solid var(--color-border);
  }

  .hero__name {
    font-size: clamp(2rem, 10vw, 3rem);
  }

  .hero__title {
    font-size: var(--font-size-xl);
  }

  .section__title {
    font-size: var(--font-size-2xl);
  }
}

/* =============================================
   Utility: Visually Hidden (accessible but off-screen)
   ============================================= */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* =============================================
   Print Styles (Resume)
   ============================================= */
@media print {
  .site-header,
  .site-footer,
  .resume-download-bar,
  .btn,
  .hamburger {
    display: none !important;
  }

  body {
    font-size: 12pt;
    color: #000;
    background: #fff;
  }

  .resume-body {
    padding-block: 0;
  }

  .resume-section {
    page-break-inside: avoid;
  }

  .resume-section__title {
    border-bottom-color: #000;
    color: #000;
  }

  a {
    color: #000;
    text-decoration: none;
  }

  .badge {
    border: 1px solid #999;
    background: #fff;
  }

  .experience-item {
    border-left-color: #999;
  }

  h1, h2, h3 {
    color: #000;
  }
}
/* =============================================
   About Page Photos
   ============================================= */
.about-photo {
  margin: 0 0 1.25rem 0;
}

.about-photo img {
  display: block;
  width: 100%;
  max-width: 640px;
  height: auto;
  border-radius: 16px;
}

.about-photo figcaption {
  margin-top: 0.5rem;
  font-size: 0.95rem;
  color: var(--muted-text, #555);
}
.footer-nav {
  list-style: none;
  padding: 0;
  margin: 0;

  display: flex;
  gap: 16px;          /* spacing between links */
  flex-wrap: wrap;    /* optional: wraps on small screens */
}

.footer-nav li {
  margin: 0;          /* remove default vertical spacing if you have any */
}

.footer-nav a {
  color: #fff;
  text-decoration: none;
}