@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&display=swap');

/* --- CUSTOM VARIABLES --- */
:root {
  --bg-primary: #FFFFFF;      /* Pure white */
  --bg-secondary: #F8F9FA;    /* Soft gray */
  --bg-accent-light: #E9ECEF; /* Soft gray tag background */
  --text-primary: #000000;    /* Monochrome black */
  --text-secondary: #495057;  /* Slate/zinc dark gray */
  --text-muted: #868E96;      /* Muted gray */
  --accent: #000000;          /* Monochrome black */
  --accent-hover: #212529;    /* Dark gray for hover */
  --accent-rgb: 0, 0, 0;      /* RGB components of accent */
  --border-color: #E2E8F0;    /* Thin subtle border */
  --border-hover: #495057;    /* Active border */
  --font-display: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --max-width: 1100px;
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- RESET & BASE STYLES --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
  background-color: var(--bg-primary);
}

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

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

/* --- TYPOGRAPHY --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

p {
  color: var(--text-secondary);
  font-weight: 400;
  line-height: 1.625;
}

.text-lead {
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--text-secondary);
  font-weight: 400;
}

.text-small {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.section-tag {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  display: inline-block;
  margin-bottom: 1rem;
}

/* --- LAYOUT UTILITIES --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.section-padding {
  padding: 8rem 0;
}

.grid {
  display: grid;
  gap: 2rem;
}

.flex {
  display: flex;
  gap: 1rem;
  align-items: center;
}

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition-smooth);
  gap: 0.5rem;
  letter-spacing: -0.01em;
}

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

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

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

/* --- NAVIGATION HEADER --- */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: rgba(253, 253, 251, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(228, 228, 231, 0.5);
  transition: var(--transition-smooth);
}

header.scrolled {
  padding: 0.75rem 0;
  background-color: rgba(253, 253, 251, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.02);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 5rem;
  transition: var(--transition-smooth);
}

header.scrolled .nav-container {
  height: 4rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-dot {
  width: 6px;
  height: 6px;
  background-color: var(--accent);
  border-radius: 50%;
  display: inline-block;
}

.nav-menu {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 2.25rem;
}

.nav-link {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.25rem 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1.5px;
  background-color: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-link.active {
  color: var(--text-primary);
  font-weight: 600;
}

.nav-resume-btn {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  border: 1.5px solid var(--accent);
  padding: 0.45rem 1rem;
  border-radius: 6px;
  transition: var(--transition-smooth);
}

.nav-resume-btn:hover {
  background-color: var(--accent);
  color: #ffffff;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 110;
}

.hamburger {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  position: relative;
  transition: var(--transition-smooth);
}

.hamburger::before,
.hamburger::after {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  position: absolute;
  transition: var(--transition-smooth);
}

.hamburger::before { top: -6px; }
.hamburger::after { bottom: -6px; }

.mobile-nav-toggle.active .hamburger {
  background-color: transparent;
}
.mobile-nav-toggle.active .hamburger::before {
  transform: rotate(45deg);
  top: 0;
}
.mobile-nav-toggle.active .hamburger::after {
  transform: rotate(-45deg);
  bottom: 0;
}

/* --- HERO / ABOUT SECTION --- */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding-top: 8rem;
  padding-bottom: 4rem;
  background: radial-gradient(circle at 80% 20%, rgba(0, 0, 0, 0.02) 0%, transparent 50%);
}

.about-layout {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 6rem;
  align-items: center;
}

.about-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.eyebrow-text {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

.hero-headline {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.about-p {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.subline-text {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-muted);
  border-left: 2px solid var(--border-color);
  padding-left: 1rem;
  font-style: italic;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

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

.photo-container {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 1;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.photo-container:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.photo-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* --- PORTFOLIO SECTIONS & GRIDS --- */
.section-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  display: inline-block;
  margin-bottom: 0.75rem;
}

.section-subheading {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
  font-weight: 400;
}

/* Products I Built For Myself Section */
.products-section {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3rem;
  margin-top: 3.5rem;
}

.product-card {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.03);
}

.product-card-image {
  height: 240px;
  background-color: var(--bg-secondary);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border-color);
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.product-card:hover .product-card-image img {
  transform: scale(1.02);
}

.product-card-content {
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  gap: 1.25rem;
}

.product-card-header {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.product-card-name {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.product-card-tagline {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.product-card-desc {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.product-card-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.product-card-actions {
  display: flex;
  gap: 1rem;
  margin-top: auto;
}

.product-card-actions .btn {
  flex: 1;
  padding: 0.65rem 1rem;
  font-size: 0.825rem;
}

/* Case Studies Section */
.case-studies-section {
  border-top: 1px solid var(--border-color);
}

.case-studies-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 3.5rem;
}

.case-study-card {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.case-study-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.03);
}

.case-study-card-image {
  height: 160px;
  background-color: var(--bg-secondary);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border-color);
  padding: 1.75rem; /* Breathing room for logos */
}

.case-study-card-image img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: var(--transition-smooth);
}

.case-study-card:hover .case-study-card-image img {
  transform: scale(1.02);
}

.case-study-card-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.case-study-card-subtitle {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.case-study-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.case-study-card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.case-study-card-link {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-primary);
  gap: 0.25rem;
  margin-top: auto;
  border-bottom: 1px solid transparent;
  width: fit-content;
  padding-bottom: 2px;
  transition: var(--transition-fast);
}

.case-study-card-link span {
  transition: var(--transition-smooth);
}

.case-study-card:hover .case-study-card-link {
  border-bottom-color: var(--text-primary);
}

.case-study-card:hover .case-study-card-link span {
  transform: translateX(4px);
}

/* Product Toolkit Section */
.toolkit-section {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
}

.toolkit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 2rem;
  margin-top: 3.5rem;
}

.toolkit-category-card {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  background-color: var(--bg-primary);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transition: var(--transition-smooth);
}

.toolkit-category-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.toolkit-category-title {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.toolkit-chips-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.toolkit-chip {
  font-size: 0.8125rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.toolkit-chip:hover {
  background-color: var(--bg-accent-light);
  color: var(--text-primary);
  border-color: var(--border-hover);
}

/* What's Next Section */
.contact-section {
  border-top: 1px solid var(--border-color);
  text-align: center;
  background: radial-gradient(circle at center bottom, rgba(0, 0, 0, 0.02) 0%, transparent 70%);
}

.contact-box {
  max-width: 650px;
  margin: 0 auto;
}

.contact-box h2 {
  font-size: 3rem;
  letter-spacing: -0.03em;
  margin-top: 0.5rem;
  margin-bottom: 1.25rem;
}

.contact-box p {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

.contact-buttons {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
}

/* --- FOOTER --- */
footer {
  border-top: 1px solid var(--border-color);
  padding: 3rem 0;
  font-family: var(--font-display);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.footer-subtitle {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* --- CASE STUDIES LAYOUT --- */
.case-study-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background-color: var(--accent);
  z-index: 101;
  width: 0%;
  transition: width 0.1s linear;
}

.case-study-hero {
  padding-top: 9rem;
  padding-bottom: 4rem;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.case-study-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background-color: var(--bg-accent-light);
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
  margin-bottom: 1.5rem;
}

.case-study-author {
  margin: 18px 0 0;
  color: var(--text-muted);
  font-size: 0.86rem;
  letter-spacing: 0.02em;
}

.case-study-author strong {
  color: var(--text-primary);
  font-weight: 650;
}

.case-study-hero h1 {
  font-size: 3.25rem;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  max-width: 900px;
}

.case-study-intro-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  margin-top: 3rem;
  align-items: start;
}

.case-study-summary {
  font-size: 1.25rem;
  line-height: 1.55;
  color: var(--text-secondary);
  font-weight: 300;
}

.case-study-metadata {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  border-left: 1px solid var(--border-color);
  padding-left: 2rem;
}

.meta-item-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.meta-item-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.case-study-container {
  display: grid;
  grid-template-columns: 2.2fr 0.8fr;
  gap: 5rem;
  padding: 5rem 0;
}

.case-study-body section {
  margin-bottom: 4.5rem;
}

.case-study-body h2 {
  font-size: 1.875rem;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1.5px solid var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-num {
  font-size: 1.1rem;
  color: var(--text-muted);
  font-weight: 400;
  font-family: var(--font-display);
}

.case-study-body h3 {
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.case-study-body p {
  font-size: 1.05rem;
  line-height: 1.65;
  margin-bottom: 1.5rem;
}

.case-study-body ul, .case-study-body ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.65;
}

.case-study-body li {
  margin-bottom: 0.5rem;
}

.decision-card {
  background-color: var(--bg-secondary);
  border-left: 4px solid var(--accent);
  padding: 2rem;
  border-radius: 0 8px 8px 0;
  margin: 2.5rem 0;
}

.decision-card-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.decision-card p {
  margin-bottom: 0;
  font-size: 0.975rem;
}

.metrics-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2.5rem 0;
}

.metric-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 1.75rem;
  border-radius: 8px;
  text-align: center;
}

.metric-value {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.metric-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.metric-desc {
  font-size: 0.775rem;
  color: var(--text-muted);
}

.data-table-wrapper {
  overflow-x: auto;
  margin: 2.5rem 0;
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.data-table th, .data-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  background-color: var(--bg-secondary);
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-primary);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.case-study-sidebar {
  position: sticky;
  top: 8rem;
  height: fit-content;
}

.sidebar-title {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.sidebar-toc {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toc-link {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: block;
  border-left: 2px solid transparent;
  padding-left: 0.75rem;
  transition: var(--transition-fast);
}

.toc-link:hover, .toc-link.active {
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 500;
}

.case-study-image {
  margin: 3rem 0;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0,0,0,0.02);
}

.case-study-image img {
  display: block;
  width: 100%;
  height: auto;
}

.archive-card {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 3rem;
  background-color: var(--bg-primary);
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  align-items: start;
  transition: var(--transition-smooth);
  margin-bottom: 2.5rem;
}

.archive-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 12px 30px rgba(0,0, 0, 0.02);
}

.persona-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin: 2rem 0;
}

.case-study-image caption {
  display: block;
  padding: 1rem 1.5rem;
  background-color: var(--bg-secondary);
  font-size: 0.85rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
  text-align: left;
}

/* --- RESUME PAGE & PRINT STYLES --- */
.resume-section {
  padding-top: 8rem;
  padding-bottom: 5rem;
}

.resume-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-bottom: 2px solid var(--text-primary);
  padding-bottom: 1.5rem;
  margin-bottom: 3rem;
}

.resume-name h1 {
  font-size: 2.75rem;
  letter-spacing: -0.03em;
  margin-bottom: 0.25rem;
}

.resume-title-sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  font-weight: 500;
  font-family: var(--font-display);
}

.resume-contact-info {
  text-align: right;
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.resume-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
}

.resume-block {
  margin-bottom: 2.5rem;
}

.resume-block-title {
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
  margin-bottom: 1.25rem;
}

.resume-item {
  margin-bottom: 1.75rem;
}

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

.resume-item-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.5rem;
}

.resume-item-title {
  font-size: 1.05rem;
  font-weight: 700;
}

.resume-item-org {
  font-size: 0.95rem;
  color: var(--accent);
  font-weight: 600;
}

.resume-item-date {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.resume-item-bullets {
  padding-left: 1.25rem;
  font-size: 0.925rem;
  color: var(--text-secondary);
}

.resume-item-bullets li {
  margin-bottom: 0.35rem;
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  font-size: 0.8125rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
  font-weight: 500;
}

/* --- PRODUCT THINKING VIEW INTRO --- */
.thinking-intro {
  padding-top: 9rem;
  padding-bottom: 3rem;
}

/* --- ANIMATION DEFINITIONS --- */
.animate-fade-in {
  opacity: 0;
  transform: translateY(15px);
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-4px);
  }
  60% {
    transform: translateY(-2px);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- PRINT RULES --- */
@media print {
  body {
    background-color: #ffffff !important;
    color: #000000 !important;
    font-size: 11pt !important;
  }
  
  header, footer, .btn, .no-print {
    display: none !important;
  }

  .resume-section {
    padding-top: 0 !important;
    padding-bottom: 0 !important;
  }

  .resume-header-row {
    border-bottom: 2px solid #000000 !important;
    margin-bottom: 20px !important;
    padding-bottom: 10px !important;
  }

  .resume-name h1 {
    font-size: 24pt !important;
  }

  .resume-title-sub {
    font-size: 12pt !important;
  }

  .resume-layout {
    display: block !important;
  }

  .resume-block {
    margin-bottom: 18px !important;
    page-break-inside: avoid;
  }

  .resume-block-title {
    font-size: 11pt !important;
    border-bottom: 1px solid #000000 !important;
    margin-bottom: 8px !important;
    padding-bottom: 2px !important;
  }

  .resume-item {
    margin-bottom: 12px !important;
  }

  .resume-item-title {
    font-size: 10.5pt !important;
  }

  .resume-item-org {
    color: #000000 !important;
  }

  .resume-item-bullets {
    padding-left: 15px !important;
  }

  .resume-item-bullets li {
    margin-bottom: 2px !important;
  }

  .skills-list {
    gap: 4px !important;
  }

  .skill-tag {
    background: none !important;
    border: 1px solid #cccccc !important;
    padding: 2px 6px !important;
    font-size: 9pt !important;
  }
}

/* --- RESPONSIVE MEDIA QUERIES --- */
@media (max-width: 1024px) {
  :root {
    --max-width: 900px;
  }
  
  .about-layout {
    gap: 3rem;
  }

  .products-grid {
    gap: 2rem;
  }

  .case-studies-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  .case-study-container {
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .section-padding {
    padding: 5rem 0;
  }

  .mobile-nav-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 5rem;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-primary);
    flex-direction: column;
    padding: 3rem 2rem;
    align-items: flex-start;
    gap: 2rem;
    transform: translateY(100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-smooth), opacity var(--transition-smooth);
    border-top: 1px solid var(--border-color);
  }

  header.scrolled .nav-menu {
    top: 4rem;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-resume-btn {
    width: 100%;
    text-align: center;
    margin-top: 1rem;
  }

  .hero {
    min-height: auto;
    padding-top: 8rem;
    padding-bottom: 4rem;
  }

  .about-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: left;
  }

  .hero-headline {
    font-size: 2.5rem;
  }

  .about-visual {
    order: -1; /* Display profile photo above text on mobile */
  }

  .photo-container {
    max-width: 240px;
  }

  .products-grid {
    grid-template-columns: 1fr;
  }
  
  .product-card {
    grid-column: span 1 !important;
  }

  .product-card-content {
    flex-direction: column !important;
    align-items: flex-start !important;
  }

  .product-card-content > div:last-child {
    align-items: flex-start !important;
    margin-top: 1.5rem;
  }

  .contact-box h2 {
    font-size: 2.25rem;
  }

  .contact-buttons {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }

  .contact-buttons .btn {
    width: 100%;
    max-width: 300px;
  }

  .footer-container {
    flex-direction: column;
    text-align: center;
    gap: 1.5rem;
  }

  .case-study-intro-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .case-study-metadata {
    border-left: none;
    border-top: 1px solid var(--border-color);
    padding-left: 0;
    padding-top: 1.5rem;
  }

  .case-study-container {
    grid-template-columns: 1fr;
  }

  .case-study-sidebar {
    display: none;
  }

  .metrics-row {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .resume-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .resume-header-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .resume-contact-info {
    text-align: left;
  }

  .case-studies-grid {
    grid-template-columns: 1fr !important;
  }

  .archive-card {
    grid-template-columns: 1fr !important;
    gap: 2rem !important;
    padding: 2rem !important;
  }

  .archive-card > div:last-child {
    border-left: none !important;
    border-top: 1px solid var(--border-color) !important;
    padding-left: 0 !important;
    padding-top: 1.5rem !important;
  }

  .persona-grid {
    grid-template-columns: 1fr !important;
    gap: 1.5rem !important;
  }
}

/* Shared dark mode and WhatsApp controls */
html[data-theme="dark"] {
  --bg-primary: #111311;
  --bg-secondary: #191c19;
  --bg-accent-light: #252a26;
  --text-primary: #f5f5f0;
  --text-secondary: #bac2bb;
  --text-muted: #8f9991;
  --accent: #f5f5f0;
  --accent-hover: #d9dfda;
  --accent-rgb: 245, 245, 240;
  --border-color: #343a35;
  --border-hover: #727d74;
  color-scheme: dark;
}

.theme-toggle {
  flex: 0 0 auto;
  min-width: 74px;
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  color: var(--text-primary);
  background: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: .75rem;
  font-weight: 600;
  transition: var(--transition-fast);
}
.case-theme-toggle { margin-left: auto; margin-right: 1.25rem; }
.theme-toggle:hover { background-color: var(--bg-secondary); border-color: var(--border-hover); transform: translateY(-1px); }
.theme-toggle:focus-visible, .whatsapp-chat:focus-visible { outline: 3px solid #f2d44d; outline-offset: 3px; }
.theme-toggle i { font-size: .9rem; }

.whatsapp-chat {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 120;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #ffffff;
  background: #25d366;
  border: 1px solid rgba(255,255,255,.35);
  box-shadow: 0 12px 32px rgba(0,0,0,.2);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}
.whatsapp-chat:hover { color: #ffffff; background: #1fbd59; transform: translateY(-3px) scale(1.03); box-shadow: 0 16px 38px rgba(0,0,0,.28); }
.whatsapp-chat i { font-size: 1.8rem; line-height: 1; }
.whatsapp-chat span { position: absolute; right: 69px; width: max-content; max-width: 190px; padding: 8px 10px; border-radius: 4px; color: #ffffff; background: #171917; opacity: 0; pointer-events: none; transform: translateX(7px); transition: opacity var(--transition-fast), transform var(--transition-fast); font-size: .72rem; }
.whatsapp-chat:hover span, .whatsapp-chat:focus-visible span { opacity: 1; transform: translateX(0); }

html[data-theme="dark"] header,
html[data-theme="dark"] header.scrolled { background-color: rgba(17, 19, 17, .92); border-color: rgba(255,255,255,.08); }
html[data-theme="dark"] .btn-primary { color: #111311; }
html[data-theme="dark"] .nav-resume-btn:hover { color: #111311; }
html[data-theme="dark"] .case-study-hero,
html[data-theme="dark"] .hero { background: radial-gradient(circle at 80% 20%, rgba(255,255,255,.035) 0%, transparent 50%) !important; }
html[data-theme="dark"] .case-study-image,
html[data-theme="dark"] .product-card,
html[data-theme="dark"] .case-study-card,
html[data-theme="dark"] .archive-card { box-shadow: 0 8px 28px rgba(0,0,0,.22); }

@media (max-width: 768px) {
  .case-theme-toggle { min-width: 42px; width: 42px; padding: 0; margin-left: auto; margin-right: .55rem; }
  .case-theme-toggle span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .whatsapp-chat { right: 16px; bottom: 16px; width: 56px; height: 56px; }
  .whatsapp-chat span { display: none; }
}