:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-muted: #f6f8fb;
  --text: #172033;
  --text-muted: #5f6d7e;
  --border: #dfe5ee;
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --accent-soft: #eaf1ff;
  --button-bg: #2563eb;
  --button-text: #ffffff;
  --header-bg: rgba(255, 255, 255, 0.92);
  --header-border: rgba(223, 229, 238, 0.9);
  --modal-backdrop: rgba(23, 32, 51, 0.56);
  --contact-bg: #172033;
  --contact-text: #ffffff;
  --contact-muted: #d6deea;
  --contact-border: rgba(255, 255, 255, 0.28);
  --color-bg: var(--bg);
  --color-bg-soft: var(--surface-muted);
  --color-surface: var(--surface);
  --color-text: var(--text);
  --color-muted: var(--text-muted);
  --color-border: var(--border);
  --color-accent: var(--accent);
  --color-accent-dark: var(--accent-strong);
  --color-accent-soft: var(--accent-soft);
  --color-success: #0f9f6e;
  --shadow-soft: 0 18px 45px rgba(23, 32, 51, 0.08);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --container: 1120px;
  --section-padding: 72px;
}

[data-theme="dark"] {
  --bg: #0f172a;
  --surface: #162033;
  --surface-muted: #111c2e;
  --text: #edf3fb;
  --text-muted: #b7c4d6;
  --border: #2b3a52;
  --accent: #60a5fa;
  --accent-strong: #93c5fd;
  --accent-soft: rgba(96, 165, 250, 0.16);
  --button-bg: #3b82f6;
  --button-text: #f8fbff;
  --header-bg: rgba(15, 23, 42, 0.9);
  --header-border: rgba(43, 58, 82, 0.82);
  --modal-backdrop: rgba(3, 7, 18, 0.72);
  --contact-bg: #0b1220;
  --contact-text: #edf3fb;
  --contact-muted: #b7c4d6;
  --contact-border: rgba(237, 243, 251, 0.28);
  --color-success: #34d399;
  --shadow-soft: 0 18px 38px rgba(2, 6, 23, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 82px;
}

html[dir="rtl"] {
  direction: rtl;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

html[dir="rtl"] .nav,
html[dir="rtl"] .hero-grid,
html[dir="rtl"] .about-grid,
html[dir="rtl"] .footer-inner {
  direction: rtl;
}

html[dir="rtl"] .nav-menu,
html[dir="rtl"] .button-row,
html[dir="rtl"] .contact-links,
html[dir="rtl"] .card-actions,
html[dir="rtl"] .tag-row {
  direction: rtl;
}

html[dir="rtl"] .project-card,
html[dir="rtl"] .community-card,
html[dir="rtl"] .accordion-header,
html[dir="rtl"] .branch-panel,
html[dir="rtl"] .credential-card,
html[dir="rtl"] .skill-card {
  text-align: right;
}

html[dir="rtl"] .project-highlights {
  padding-right: 18px;
  padding-left: 0;
}

html[dir="rtl"] .project-modal-close {
  float: left;
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

body.nav-open {
  overflow: hidden;
}

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

p,
h1,
h2,
h3 {
  margin: 0;
}

.container {
  width: min(100% - 32px, var(--container));
  margin: 0 auto;
}

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

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

.section-heading {
  max-width: 720px;
  margin-bottom: 32px;
}

.section-heading h2,
.contact-container h2 {
  margin-top: 8px;
  font-size: clamp(1.75rem, 4vw, 2.6rem);
  line-height: 1.16;
  letter-spacing: 0;
}

.section-text {
  color: var(--color-muted);
  font-size: 1.05rem;
}

.eyebrow,
.card-meta {
  color: var(--color-accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.button-row,
.contact-links,
.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-weight: 700;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

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

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

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

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

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

/* Accordion sections */
.accordion-section {
  padding-top: 34px;
  padding-bottom: 34px;
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 18px;
  padding: 20px 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  text-align: left;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(23, 32, 51, 0.04);
}

.accordion-copy {
  display: grid;
  gap: 6px;
}

.accordion-title {
  color: var(--color-text);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 800;
  line-height: 1.3;
}

.accordion-meta {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  gap: 12px;
}

.accordion-count {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font-size: 0.82rem;
  font-weight: 800;
  white-space: nowrap;
}

.accordion-chevron {
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
  transform: rotate(45deg);
  transition: transform 180ms ease;
}

.accordion-section.is-open .accordion-chevron {
  transform: rotate(225deg);
}

.accordion-panel {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 260ms ease, opacity 220ms ease;
}

.accordion-section.is-open .accordion-panel {
  opacity: 1;
}

.accordion-panel-inner {
  padding-top: 22px;
}

/* Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  backdrop-filter: blur(14px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.nav-logo {
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 800;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--color-muted);
  font-size: 0.94rem;
  font-weight: 600;
}

.nav-menu a {
  transition: color 180ms ease;
}

.nav-menu a:hover,
.nav-menu a:focus {
  color: var(--color-accent);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.theme-toggle:hover,
.theme-toggle:focus {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}

.theme-toggle-icon {
  display: block;
}

.language-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.language-option {
  min-width: 34px;
  min-height: 30px;
  padding: 0 8px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
  transition: background-color 180ms ease, color 180ms ease;
}

.language-option:hover,
.language-option:focus,
.language-option.is-active {
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--color-text);
  border-radius: 999px;
  transition: transform 180ms ease, opacity 180ms ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Hero */
.hero {
  min-height: min(640px, calc(100vh - 72px));
  display: flex;
  align-items: center;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.08), transparent 34%),
    linear-gradient(315deg, rgba(15, 159, 110, 0.08), transparent 28%),
    var(--color-bg);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 52px;
  align-items: center;
}

.hero-copy h1 {
  max-width: 780px;
  margin-top: 12px;
  font-size: clamp(2.55rem, 7vw, 5.25rem);
  line-height: 1.02;
  letter-spacing: 0;
}

.hero-subtitle {
  max-width: 650px;
  margin: 22px 0 10px;
  color: var(--color-muted);
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 700;
}

.hero-description {
  max-width: 720px;
  margin: 0 0 28px;
  color: var(--color-muted);
  font-size: 1.02rem;
}

.status-line {
  margin-top: 18px;
  color: var(--color-muted);
  font-size: 0.92rem;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 48px;
  align-items: start;
}

.project-card,
.credential-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.experience h3 {
  margin-bottom: 14px;
  font-size: 1.05rem;
}

.experience-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.experience-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2px 16px;
  padding: 14px 0;
  border-top: 1px solid var(--color-border);
}

.experience-list li:last-child {
  border-bottom: 1px solid var(--color-border);
}

.experience-list span:not(.experience-years) {
  grid-column: 1;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.experience-years {
  grid-column: 2;
  grid-row: 1;
  color: var(--color-muted);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.skills-list {
  max-width: 860px;
}

/* Cards and grids */
.featured-grid,
.project-grid,
.skills-grid {
  display: grid;
  gap: 18px;
}

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

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

.skills-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.product-project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.product-project-card {
  box-shadow: 0 12px 30px rgba(23, 32, 51, 0.05);
}

.subsection-heading {
  max-width: 680px;
  margin: 34px 0 18px;
}

.subsection-heading h3 {
  margin-top: 6px;
  font-size: 1.15rem;
  line-height: 1.35;
}

.experimental-tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.personal-tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.edge-ai-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.edge-ai-card {
  border-color: rgba(37, 99, 235, 0.22);
  background:
    linear-gradient(180deg, rgba(37, 99, 235, 0.045), rgba(255, 255, 255, 0) 42%),
    var(--color-surface);
  box-shadow: 0 12px 30px rgba(23, 32, 51, 0.06);
}

.personal-tool-card {
  border-color: rgba(95, 109, 126, 0.24);
  box-shadow: 0 10px 24px rgba(23, 32, 51, 0.04);
}

.experimental-tool-card {
  border-color: rgba(95, 109, 126, 0.28);
  box-shadow: 0 10px 24px rgba(23, 32, 51, 0.04);
}

.community-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.community-card {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(190px, 0.55fr);
  align-items: start;
  gap: 18px;
  padding: 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: 0 10px 24px rgba(23, 32, 51, 0.04);
}

.community-card h3 {
  font-size: 1.1rem;
  line-height: 1.3;
}

.community-card p:not(.card-meta) {
  color: var(--color-muted);
}

.project-note {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.project-card > div:first-child,
.community-card > div:first-child {
  grid-column: 1;
}

.project-card > .stats-grid,
.community-card > .stats-grid {
  grid-column: 1 / -1;
  grid-row: auto;
}

.project-card > .tag-row,
.community-card > .tag-row {
  grid-column: 1;
}

.project-card > .card-actions,
.community-card > .card-actions,
.project-card > .show-more-btn,
.community-card > .show-more-btn {
  grid-column: 2;
}

.credentials-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.project-card,
.skill-card,
.credential-card {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 22px;
}

.project-card {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(190px, 0.55fr);
  align-items: start;
  min-height: 0;
  padding: 18px;
  box-shadow: 0 8px 22px rgba(23, 32, 51, 0.04);
}

.project-card-featured {
  grid-template-columns: minmax(0, 1.45fr) minmax(220px, 0.6fr);
  padding: 22px;
}

.project-card-primary {
  border-color: rgba(37, 99, 235, 0.32);
  background:
    linear-gradient(180deg, rgba(37, 99, 235, 0.06), rgba(255, 255, 255, 0) 42%),
    var(--color-surface);
  box-shadow: var(--shadow-soft);
}

.project-card-primary h3 {
  font-size: clamp(1.35rem, 3vw, 1.75rem);
}

.project-card-featured .card-meta::after {
  margin-left: 8px;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  content: "Featured";
  font-size: 0.7rem;
  font-weight: 800;
}

.project-card-secondary {
  border-color: rgba(37, 99, 235, 0.22);
}

.project-card-secondary h3 {
  font-size: clamp(1.2rem, 2.2vw, 1.5rem);
}

.project-card-audio {
  border-color: rgba(15, 159, 110, 0.26);
  background:
    linear-gradient(180deg, rgba(15, 159, 110, 0.06), rgba(255, 255, 255, 0) 44%),
    var(--color-surface);
}

.project-card-audio h3 {
  font-size: clamp(1.2rem, 2.2vw, 1.5rem);
}

.project-card .project-subtitle {
  margin-bottom: 10px;
  color: var(--color-text);
  font-weight: 700;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: 10px;
}

.stats-grid span {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 0;
  min-height: 68px;
  padding: 10px 12px;
  border: 1px solid rgba(37, 99, 235, 0.18);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-muted);
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.35;
  text-align: center;
  overflow-wrap: anywhere;
}

.stats-grid strong {
  display: block;
  max-width: 100%;
  color: var(--color-accent-dark);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.1;
  overflow-wrap: anywhere;
}

.stats-grid-compact {
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
}

.project-card-featured > .stats-grid {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.project-highlights {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 18px;
  color: var(--color-muted);
  font-size: 0.92rem;
}

.tag-row-dense span {
  font-size: 0.78rem;
}

.compact-card {
  gap: 14px;
}

.project-card-wide {
  grid-column: span 2;
}

.branch-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.branch-panel {
  display: grid;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-soft);
}

.branch-label {
  color: var(--color-accent);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.branch-panel h4 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.3;
}

.branch-panel p {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.project-card h3,
.skill-card h3,
.credential-card h3 {
  font-size: 1.1rem;
  line-height: 1.3;
}

.project-card p:not(.card-meta),
.credential-card p:not(.card-meta) {
  color: var(--color-muted);
}

.has-project-details > div:first-child > p:not(.card-meta):not(.project-subtitle),
.community-card.has-project-details > div:first-child > p:not(.card-meta):not(.project-subtitle) {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.has-project-details .stats-grid > span:nth-child(n + 6) {
  display: none;
}

.project-card-featured.has-project-details .stats-grid > span:nth-child(n + 5) {
  display: none;
}

.has-project-details .tag-row-dense > span:nth-child(n + 7) {
  display: none;
}

.project-card h3 {
  margin: 8px 0 10px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-row span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 10px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font-size: 0.82rem;
  font-weight: 700;
}

.card-actions {
  padding-top: 4px;
}

.card-actions a {
  color: var(--color-accent);
  font-size: 0.92rem;
  font-weight: 800;
}

.card-actions a:hover {
  color: var(--color-accent-dark);
}

.project-details {
  display: none;
}

.show-more-btn {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  gap: 8px;
  min-height: 36px;
  padding: 6px 0;
  border: 0;
  background: transparent;
  color: var(--color-accent);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 800;
  cursor: pointer;
}

.show-more-btn:hover {
  color: var(--color-accent-dark);
}

.show-more-chevron {
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  transition: transform 180ms ease;
}

.project-modal[hidden] {
  display: none;
}

.project-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 24px;
}

.project-modal-backdrop {
  position: absolute;
  inset: 0;
  background: var(--modal-backdrop);
}

.project-modal-dialog {
  position: relative;
  z-index: 1;
  width: min(100%, 880px);
  max-height: min(84vh, 820px);
  overflow: auto;
  padding: 26px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: 0 28px 70px rgba(23, 32, 51, 0.24);
}

.project-modal-close {
  position: sticky;
  top: 0;
  float: right;
  width: 38px;
  height: 38px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
}

.project-modal-content {
  display: grid;
  gap: 20px;
}

.project-modal-header h2 {
  margin-top: 6px;
  font-size: clamp(1.55rem, 4vw, 2.3rem);
  line-height: 1.15;
}

.project-modal-content .stats-grid {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.project-modal-content .stats-grid span,
.project-modal-content .tag-row span {
  display: inline-flex;
}

.project-modal-content .branch-grid {
  display: grid;
}

.project-modal-content .project-highlights {
  display: grid;
}

.project-modal-content .card-actions {
  display: flex;
}

body.modal-open {
  overflow: hidden;
}

/* Credentials */
.credential-card {
  min-height: 100%;
}

.credential-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 18px;
  color: var(--color-muted);
}

.certification-list {
  display: grid;
  gap: 12px;
}

.certification-item {
  display: grid;
  gap: 6px;
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-soft);
}

.certification-item h4 {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.3;
}

.certification-item p {
  color: var(--color-muted);
  font-size: 0.88rem;
}

.certification-item a {
  color: var(--color-accent);
  font-size: 0.86rem;
  font-weight: 800;
}

.certification-item a:hover {
  color: var(--color-accent-dark);
}

/* Contact and footer */
.contact-section {
  background: var(--contact-bg);
  color: var(--contact-text);
}

.contact-container {
  max-width: 760px;
  text-align: center;
}

.contact-container .eyebrow {
  color: var(--color-accent);
}

.contact-container p:not(.eyebrow) {
  margin: 16px auto 26px;
  color: var(--contact-muted);
}

.contact-links {
  justify-content: center;
}

.contact-items {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 0 auto 24px;
}

.contact-items a,
.contact-items span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 6px 12px;
  border: 1px solid var(--contact-border);
  border-radius: 999px;
  color: var(--contact-text);
  font-size: 0.9rem;
  font-weight: 700;
}

.contact-items a:hover {
  border-color: var(--contact-text);
}

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

.contact-section .button-secondary:hover {
  border-color: var(--contact-text);
  color: var(--contact-text);
}

.site-footer {
  padding: 24px 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-muted);
  font-size: 0.92rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-inner a {
  color: var(--color-accent);
  font-weight: 700;
}

[data-theme="dark"] .accordion-header,
[data-theme="dark"] .project-card,
[data-theme="dark"] .skill-card,
[data-theme="dark"] .credential-card,
[data-theme="dark"] .community-card,
[data-theme="dark"] .product-project-card,
[data-theme="dark"] .learning-project-card,
[data-theme="dark"] .side-project-card,
[data-theme="dark"] .project-modal-dialog {
  box-shadow: none;
}

[data-theme="dark"] .hero {
  background:
    linear-gradient(135deg, rgba(96, 165, 250, 0.1), transparent 34%),
    linear-gradient(315deg, rgba(52, 211, 153, 0.08), transparent 28%),
    var(--color-bg);
}

[data-theme="dark"] .project-card-primary {
  background:
    linear-gradient(180deg, rgba(96, 165, 250, 0.1), rgba(96, 165, 250, 0) 42%),
    var(--color-surface);
}

[data-theme="dark"] .project-card-audio {
  background:
    linear-gradient(180deg, rgba(52, 211, 153, 0.08), rgba(52, 211, 153, 0) 44%),
    var(--color-surface);
}

[data-theme="dark"] .stats-grid span,
[data-theme="dark"] .branch-panel,
[data-theme="dark"] .certification-item {
  background: var(--color-surface-muted);
}

@media (max-width: 940px) {
  :root {
    --section-padding: 60px;
  }

  .hero {
    min-height: auto;
    padding-top: 64px;
  }

  .hero-grid,
  .about-grid {
    grid-template-columns: 1fr;
  }

  .skills-grid,
  .credentials-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .featured-grid,
  .project-grid {
    grid-template-columns: 1fr;
  }

  .product-project-grid {
    grid-template-columns: 1fr;
  }

  .edge-ai-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 72px;
    right: 16px;
    left: 16px;
    display: grid;
    gap: 4px;
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 180ms ease, transform 180ms ease;
  }

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

  .nav-menu a {
    padding: 12px;
    border-radius: var(--radius-sm);
  }

  .nav-menu a:hover,
  .nav-menu a:focus {
    background: var(--color-accent-soft);
  }

  .theme-toggle {
    justify-self: start;
    margin-top: 4px;
  }

  .hero-copy h1 {
    font-size: clamp(2.45rem, 13vw, 4rem);
  }

  .featured-grid,
  .project-grid,
  .skills-grid,
  .product-project-grid,
  .edge-ai-grid,
  .personal-tool-grid,
  .experimental-tool-grid,
  .community-grid,
  .credentials-grid {
    grid-template-columns: 1fr;
  }

  .project-card-featured {
    min-height: auto;
  }

  .project-card,
  .project-card-featured,
  .community-card {
    grid-template-columns: 1fr;
  }

  .project-card > .stats-grid,
  .community-card > .stats-grid,
  .project-card > .tag-row,
  .community-card > .tag-row,
  .project-card > .card-actions,
  .community-card > .card-actions,
  .project-card > .show-more-btn,
  .community-card > .show-more-btn {
    grid-column: 1;
    grid-row: auto;
  }

  .project-modal {
    padding: 12px;
  }

  .project-modal-dialog {
    max-height: 88vh;
    padding: 20px;
  }

  .accordion-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .accordion-meta {
    justify-content: space-between;
    width: 100%;
  }

  .project-card-wide {
    grid-column: auto;
  }

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

  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(126px, 1fr));
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 460px) {
  .container {
    width: min(100% - 24px, var(--container));
  }

  .button,
  .contact-links .button {
    width: 100%;
  }

  .project-card,
  .skill-card,
  .community-card,
  .credential-card {
    padding: 18px;
  }
}