:root {
  --ink: #14263d;
  --bg: #eef6f4;
  --panel: rgba(255, 255, 255, 0.66);
  --accent: #0f766e;
  --accent-deep: #0b5e57;
  --muted: #4d647f;
  --ring: rgba(20, 38, 61, 0.17);
  --radius: 18px;
}

body[data-theme="dark"] {
  --ink: #e8f1ff;
  --bg: #0f1e2e;
  --panel: rgba(19, 33, 54, 0.7);
  --accent: #34d399;
  --accent-deep: #10b981;
  --muted: #9eb2cb;
  --ring: rgba(232, 241, 255, 0.25);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 14%, rgba(15, 118, 110, 0.2), transparent 42%),
    radial-gradient(circle at 88% 16%, rgba(59, 130, 246, 0.16), transparent 45%),
    linear-gradient(160deg, #eef6f4 0%, #e7f0ee 52%, #f2f8f6 100%);
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
}

body[data-theme="dark"] {
  background:
    radial-gradient(circle at 10% 14%, rgba(52, 211, 153, 0.16), transparent 42%),
    radial-gradient(circle at 88% 16%, rgba(59, 130, 246, 0.2), transparent 45%),
    linear-gradient(160deg, #0f1e2e 0%, #14283d 52%, #17324a 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    -35deg,
    rgba(255, 255, 255, 0.17) 0,
    rgba(255, 255, 255, 0.17) 1px,
    transparent 1px,
    transparent 18px
  );
  opacity: 0.08;
  z-index: -2;
}

body[data-theme="dark"]::before {
  opacity: 0.08;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  z-index: 140;
  background: linear-gradient(90deg, var(--accent), #3b82f6);
}

.bg-orb {
  position: fixed;
  z-index: -1;
  border-radius: 999px;
  filter: blur(45px);
  opacity: 0.32;
}

.orb-a {
  width: 320px;
  height: 320px;
  top: -80px;
  right: -100px;
  background: rgba(15, 118, 110, 0.34);
}

.orb-b {
  width: 260px;
  height: 260px;
  bottom: -60px;
  left: -60px;
  background: rgba(59, 130, 246, 0.28);
}

.site-header {
  position: sticky;
  top: 12px;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, 94vw);
  margin: 0 auto;
  padding: 14px 18px;
  backdrop-filter: blur(8px);
  background: rgba(238, 244, 248, 0.88);
  border: 1px solid rgba(16, 35, 58, 0.11);
  border-radius: 14px;
  box-shadow: 0 8px 20px rgba(16, 35, 58, 0.08);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.theme-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--ring);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.6);
  color: var(--ink);
  padding: 7px 11px;
  font-weight: 700;
  cursor: pointer;
}

.theme-btn:hover,
.theme-btn:focus-visible {
  border-color: var(--accent);
}

.brand {
  font-family: "Fraunces", serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
}

.menu-btn {
  display: none;
  border: 1px solid var(--ring);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.6);
  color: var(--ink);
  padding: 8px 12px;
  font-weight: 700;
}

.nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
}

.nav a {
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
  font-size: 0.84rem;
  padding: 7px 10px;
  border-radius: 999px;
  position: relative;
}

.nav .theme-btn {
  padding: 7px 10px;
  font-size: 0.84rem;
  gap: 6px;
  display: inline-flex;
  align-items: center;
  border: none;
  background: transparent;
  color: var(--ink);
  font-weight: 600;
  cursor: pointer;
  position: relative;
}

.nav .theme-btn::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.24s ease;
  background: var(--accent);
}

.nav .theme-btn:hover::after,
.nav .theme-btn:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav .theme-btn:hover,
.nav .theme-btn:focus-visible {
  background: rgba(255, 255, 255, 0.75);
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.24s ease;
  background: var(--accent);
}

.nav a:hover::after,
.nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav a:hover,
.nav a:focus-visible {
  background: rgba(255, 255, 255, 0.75);
}

.nav a.active {
  background: rgba(15, 118, 110, 0.14);
}

body[data-theme="dark"] .nav a.active {
  background: rgba(52, 211, 153, 0.2);
}

main {
  width: min(1120px, 92vw);
  margin: 0 auto;
  padding-bottom: 24px;
}

section {
  margin: 72px 0;
}

.hero {
  margin-top: 28px;
  padding: 34px;
  border: 1px solid rgba(16, 35, 58, 0.11);
  border-radius: calc(var(--radius) + 4px);
  background: var(--panel);
  box-shadow: 0 10px 28px rgba(16, 35, 58, 0.08);
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 16px;
  align-items: start;
}

.kpi-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.kpi-item {
  border: 1px solid rgba(16, 35, 58, 0.12);
  border-radius: 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.74);
}

.kpi-value {
  margin: 0;
  font-family: "Fraunces", serif;
  font-size: 1.1rem;
  font-weight: 700;
}

.kpi-label {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.eyebrow {
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--muted);
}

.hero-role {
  margin: 10px 0 0;
  font-size: 0.82rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--accent-deep);
  font-weight: 700;
}

h1,
h2,
h3 {
  font-family: "Fraunces", "Georgia", serif;
  line-height: 1.12;
}

h1 {
  font-size: clamp(2rem, 6vw, 4.1rem);
  max-width: 20ch;
  margin: 8px 0 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 0.96;
}

.hero-name {
  display: block;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 1.02em;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 0.92;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 2px;
}

.hero-tagline {
  display: block;
  font-size: 0.38em;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 0;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  margin: 0 0 14px;
}

.hero-copy {
  max-width: 62ch;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.6;
}

.hero-impact-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 20px 0;
}

.impact-card {
  border: 1px solid rgba(15, 118, 110, 0.3);
  background: linear-gradient(135deg, rgba(15, 118, 110, 0.08), rgba(255, 255, 255, 0.6));
  border-radius: 12px;
  padding: 14px;
  text-align: center;
}

.impact-value {
  margin: 0;
  font-family: "Fraunces", serif;
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--accent-deep);
  line-height: 1.1;
}

.impact-unit {
  font-size: 0.62em;
  letter-spacing: 0.02em;
}

.impact-label {
  margin: 6px 0 0;
  font-size: 0.72rem;
  color: var(--muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.core-skills {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 12px;
}

.core-skill {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border: 1px solid rgba(16, 35, 58, 0.1);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.5);
  font-size: 0.95rem;
  font-weight: 600;
}

.core-skill i {
  font-size: 1.2rem;
  color: var(--accent);
}

body[data-theme="dark"] .impact-card {
  background: linear-gradient(135deg, rgba(52, 211, 153, 0.12), rgba(16, 28, 45, 0.8));
  border-color: rgba(52, 211, 153, 0.3);
}

body[data-theme="dark"] .core-skill {
  background: rgba(16, 28, 45, 0.6);
  border-color: rgba(52, 211, 153, 0.2);
}

.hero-spotlight {
  border: 1px solid rgba(16, 35, 58, 0.12);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.56));
  border-radius: 16px;
  padding: 16px;
}

.spotlight-label {
  margin: 0;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.hero-spotlight h3 {
  margin: 8px 0 10px;
  font-size: 1.2rem;
}

.hero-spotlight ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.hero-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.hero-metrics span {
  border: 1px solid rgba(16, 35, 58, 0.12);
  background: rgba(255, 255, 255, 0.62);
  padding: 7px 10px;
  border-radius: 999px;
  font-size: 0.86rem;
  color: var(--ink);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  border-radius: 12px;
  padding: 11px 17px;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform 0.22s ease, background-color 0.22s ease, color 0.22s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--accent-deep);
}

.btn-ghost {
  border-color: var(--ring);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.5);
}

.btn-icon i {
  font-size: 1rem;
}

.btn-icon span {
  line-height: 1;
}

.about,
.skills,
.ai-lab,
.talk,
.contact {
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid rgba(16, 35, 58, 0.1);
  background: rgba(255, 255, 255, 0.55);
  box-shadow: 0 6px 16px rgba(16, 35, 58, 0.05);
}

.ai-intro {
  margin-top: 0;
  margin-bottom: 12px;
  color: var(--muted);
}

.ai-trend-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.ai-trend-tags span {
  border: 1px solid rgba(15, 31, 51, 0.14);
  background: rgba(255, 255, 255, 0.85);
  color: var(--ink);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 0.76rem;
  font-weight: 700;
}

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

.ai-card {
  border: 1px solid rgba(16, 35, 58, 0.11);
  border-radius: 14px;
  padding: 16px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(255, 255, 255, 0.72)),
    radial-gradient(circle at top right, rgba(15, 118, 110, 0.14), transparent 60%);
  box-shadow: 0 6px 14px rgba(16, 35, 58, 0.05);
}

.ai-card h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.ai-card p {
  margin-bottom: 0;
}

.ai-studio {
  margin-top: 14px;
  border: 1px solid rgba(15, 31, 51, 0.12);
  border-radius: 14px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.72);
}

.ai-studio h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.ai-studio > p {
  margin-top: 0;
  margin-bottom: 10px;
  color: var(--muted);
}

.studio-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.studio-btn {
  border: 1px solid rgba(15, 31, 51, 0.15);
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  border-radius: 999px;
  padding: 6px 10px;
  font-weight: 700;
  cursor: pointer;
}

.studio-btn.active {
  border-color: var(--accent);
  background: rgba(15, 118, 110, 0.16);
}

.studio-panel {
  border: 1px dashed rgba(15, 31, 51, 0.2);
  border-radius: 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.83);
}

.studio-label {
  margin: 0 0 8px;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

#studioPrompt {
  margin: 0 0 10px;
  white-space: pre-wrap;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  background: rgba(15, 31, 51, 0.06);
  border-radius: 10px;
  padding: 10px;
}

#studioOutcome {
  margin: 0;
}

main section h2 {
  display: inline-block;
  position: relative;
  padding-right: 18px;
}

main section h2::after {
  content: "";
  position: absolute;
  right: 0;
  top: 56%;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--accent);
  transform: translateY(-50%);
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 16px;
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.project-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(16, 35, 58, 0.1);
  padding-bottom: 10px;
}

.filter-btn {
  border: 1px solid rgba(15, 31, 51, 0.15);
  background: rgba(255, 255, 255, 0.88);
  color: var(--ink);
  border-radius: 10px;
  padding: 6px 10px;
  font-weight: 700;
  cursor: pointer;
}

.filter-btn.active {
  border-color: var(--accent);
  background: rgba(15, 118, 110, 0.16);
}

body[data-theme="dark"] .filter-btn,
body[data-theme="dark"] .prompt-btn,
body[data-theme="dark"] .studio-btn,
body[data-theme="dark"] .footer-link,
body[data-theme="dark"] .theme-btn {
  background: rgba(16, 28, 45, 0.8);
  border-color: rgba(232, 241, 255, 0.2);
}

body[data-theme="dark"] .ai-card,
body[data-theme="dark"] .ai-studio,
body[data-theme="dark"] .studio-panel,
body[data-theme="dark"] #studioPrompt {
  background: rgba(16, 28, 45, 0.78);
}

body[data-theme="dark"] .card {
  background: rgba(16, 28, 45, 0.9);
}

body[data-theme="dark"] .card:hover {
  background: rgba(16, 28, 45, 0.95);
  box-shadow: 0 16px 32px rgba(52, 211, 153, 0.15);
}

body[data-theme="dark"] .card.featured {
  background: linear-gradient(135deg, rgba(52, 211, 153, 0.15), rgba(16, 28, 45, 0.96));
  border-color: var(--accent);
}

body[data-theme="dark"] .card.featured:hover {
  background: linear-gradient(135deg, rgba(52, 211, 153, 0.2), rgba(16, 28, 45, 0.98));
  box-shadow: 0 24px 48px rgba(52, 211, 153, 0.22);
  border-color: var(--accent-deep);
}

body[data-theme="dark"] .skill-box {
  background: rgba(16, 28, 45, 0.85);
}

body[data-theme="dark"] .skill-box:hover {
  background: rgba(16, 28, 45, 0.95);
  box-shadow: 0 8px 16px rgba(52, 211, 153, 0.15);
}

.projects, .about {
  background: rgba(255, 255, 255, 0.58);
}

body[data-theme="dark"] .projects,
body[data-theme="dark"] .about {
  background: rgba(16, 28, 45, 0.85);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.card {
  position: relative;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(16, 35, 58, 0.11);
  border-radius: 14px;
  padding: 18px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), #38bdf8);
}

.card.featured {
  border: 2.5px solid var(--accent);
  background: linear-gradient(135deg, rgba(15, 118, 110, 0.12), rgba(255, 255, 255, 0.92));
  grid-column: 1 / -1;
}

.card.featured::before {
  height: 6px;
  background: linear-gradient(90deg, var(--accent), var(--accent-deep), #38bdf8);
}

.badge-featured {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
  padding: 6px 10px;
  border: 1.5px solid var(--accent);
  border-radius: 6px;
  background: rgba(15, 118, 110, 0.12);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(21, 34, 56, 0.12);
  border-color: var(--accent);
}

.card.featured:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 48px rgba(15, 118, 110, 0.18);
  border-color: var(--accent-deep);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 1.15rem;
  color: var(--ink);
}

.card p {
  line-height: 1.6;
}

.case-line {
  margin: 0 0 10px;
  font-size: 0.95rem;
}

.card-kicker {
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 8px;
}

.case-line {
  margin: 0 0 8px;
  line-height: 1.5;
}

.impact-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin: 14px 0 10px;
  padding: 12px;
  background: rgba(15, 118, 110, 0.08);
  border-radius: 10px;
  border: 1px solid rgba(15, 118, 110, 0.15);
}

.metric-badge {
  text-align: center;
  padding: 10px 8px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(15, 118, 110, 0.2);
}

.metric-value {
  display: block;
  font-family: "Fraunces", serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-deep);
  line-height: 1;
  margin-bottom: 4px;
}

.metric-label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-weight: 700;
}

body[data-theme="dark"] .impact-metrics {
  background: rgba(52, 211, 153, 0.1);
  border-color: rgba(52, 211, 153, 0.2);
}

body[data-theme="dark"] .metric-badge {
  background: rgba(16, 28, 45, 0.8);
  border-color: rgba(52, 211, 153, 0.25);
}

.arch-diagram {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.arch-diagram span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--ink);
  border: 1px dashed rgba(16, 35, 58, 0.2);
  background: rgba(255, 255, 255, 0.85);
  border-radius: 10px;
  min-height: 46px;
  padding: 6px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 12px;
}

.tag-row span {
  font-size: 0.74rem;
  padding: 5px 8px;
  border-radius: 999px;
  border: 1px solid rgba(16, 35, 58, 0.14);
  background: rgba(255, 255, 255, 0.88);
}

.skills ul {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
}

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

.skill-box {
  border: 1px solid rgba(16, 35, 58, 0.11);
  border-radius: 12px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.73);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.skills-intro {
  margin-top: 0;
  margin-bottom: 20px;
  color: var(--muted);
  font-size: 0.95rem;
}

.skill-box {
  border: 1px solid rgba(16, 35, 58, 0.11);
  border-radius: 12px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.73);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.skill-box:hover {
  transform: translateY(-2px);
  background: rgba(15, 118, 110, 0.08);
  box-shadow: 0 8px 16px rgba(15, 118, 110, 0.12);
  border-color: var(--accent);
}

.skill-box h3 {
  font-size: 1.05rem;
  margin: 0 0 8px;
  color: var(--ink);
  font-weight: 600;
}

.skill-box p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.5;
}

.about ul,
.skills ul {
  margin-top: 10px;
}

.about li,
.skills li {
  padding-left: 2px;
}

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

.contact-item {
  border: 1px solid rgba(16, 35, 58, 0.1);
  background: rgba(255, 255, 255, 0.72);
  border-radius: 12px;
  padding: 12px;
}

.contact-wide {
  grid-column: 1 / -1;
}

.contact-label {
  margin: 0 0 6px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.contact-item p {
  margin: 0;
}

.contact-intro {
  margin-top: 0;
  margin-bottom: 12px;
  color: var(--muted);
}

.contact a {
  color: var(--accent-deep);
  font-weight: 700;
  text-decoration-thickness: 1px;
}

.talk-intro {
  margin-top: 0;
  margin-bottom: 12px;
  color: var(--muted);
}

.chat-shell {
  border: 1px solid rgba(15, 31, 51, 0.12);
  background: rgba(255, 255, 255, 0.72);
  border-radius: 14px;
  padding: 10px;
}

.chat-messages {
  max-height: 240px;
  overflow-y: auto;
  display: grid;
  gap: 10px;
  padding: 6px;
}

.chat-msg {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.chat-msg p {
  margin: 0;
  padding: 10px 12px;
  border-radius: 12px;
  max-width: min(86%, 620px);
}

.chat-msg.bot p {
  background: rgba(15, 118, 110, 0.12);
  border: 1px solid rgba(15, 118, 110, 0.24);
}

.chat-msg.user {
  justify-content: flex-end;
}

.chat-msg.user p {
  background: rgba(56, 189, 248, 0.16);
  border: 1px solid rgba(56, 189, 248, 0.26);
}

.chat-msg.typing p {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.chat-msg.typing span {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--muted);
  animation: typingPulse 1.1s infinite ease-in-out;
}

.chat-msg.typing span:nth-child(2) {
  animation-delay: 0.15s;
}

.chat-msg.typing span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes typingPulse {
  0%,
  80%,
  100% {
    transform: scale(0.7);
    opacity: 0.55;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

.quick-prompts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.prompt-btn {
  border: 1px solid rgba(15, 31, 51, 0.16);
  background: rgba(255, 255, 255, 0.88);
  color: var(--ink);
  border-radius: 999px;
  padding: 6px 10px;
  font-weight: 600;
  cursor: pointer;
}

.prompt-btn:hover,
.prompt-btn:focus-visible {
  border-color: var(--accent);
}

.chat-form {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.chat-form input {
  border: 1px solid rgba(15, 31, 51, 0.2);
  border-radius: 12px;
  padding: 10px 12px;
  font: inherit;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
}

.chat-form input:focus {
  outline: 2px solid rgba(15, 118, 110, 0.3);
  border-color: var(--accent);
}

.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;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.contact-link i {
  font-size: 1rem;
  color: var(--accent);
}

.contact-link:hover i,
.contact-link:focus-visible i {
  transform: translateY(-1px);
}

.site-footer {
  padding: 12px 6vw 34px;
  color: var(--muted);
}

.footer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 10px;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--ink);
  border: 1px solid rgba(15, 31, 51, 0.15);
  background: rgba(255, 255, 255, 0.7);
  padding: 8px 12px;
  border-radius: 10px;
  font-weight: 600;
}

.footer-link i {
  color: var(--accent);
}

.footer-link:hover,
.footer-link:focus-visible {
  transform: translateY(-1px);
  border-color: var(--accent);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}



@media (max-width: 860px) {
  .site-header {
    border-radius: 16px;
  }

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

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

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

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

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

  .nav {
    justify-content: flex-start;
  }

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

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

  .section-head {
    align-items: start;
    flex-direction: column;
  }
}

@media (max-width: 700px) {
  .menu-btn {
    display: inline-flex;
  }

  .theme-btn span {
    display: none;
  }

  .nav {
    position: absolute;
    right: 6vw;
    top: 74px;
    display: none;
    flex-direction: column;
    width: 230px;
    gap: 12px;
    padding: 14px;
    border-radius: 12px;
    border: 1px solid rgba(16, 35, 58, 0.1);
    background: rgba(238, 244, 248, 0.96);
    box-shadow: 0 15px 35px rgba(16, 35, 58, 0.12);
  }

  .nav.open {
    display: flex;
  }

  .hero {
    padding: 24px;
  }

  .hero-impact-grid {
    gap: 10px;
  }

  .impact-card {
    padding: 12px 10px;
  }

  .impact-value {
    font-size: 1.45rem;
  }

  .impact-label {
    font-size: 0.68rem;
  }

  .kpi-strip {
    grid-template-columns: 1fr;
  }

  .chat-form {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-impact-grid {
    grid-template-columns: 1fr;
  }

  .impact-value {
    font-size: 1.35rem;
  }

  .impact-label {
    font-size: 0.66rem;
  }
}