/* =============================================
   Art direction: Technical portfolio → precise, confident, restrained
   Palette: Purple-toned surfaces, orange accent
   Typography: Cabinet Grotesk (display) + Satoshi (body)
   Density: balanced — generous section spacing, dense within cards
============================================= */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ============================================================
   LIGHT MODE COLOR PALETTE
============================================================ */
:root, [data-theme="light"] {
  --color-bg:              #f7f4fb;
  --color-surface:         #faf8fd;
  --color-surface-2:       #ffffff;
  --color-surface-offset:  #efe9f7;
  --color-surface-dynamic: #e5daf0;
  --color-divider:         #d8cfe8;
  --color-border:          #ccc0df;

  --color-text:            #1a0028;
  --color-text-muted:      #6b5f7a;
  --color-text-faint:      #b8aec8;
  --color-text-inverse:    #f9f9f7;

  --color-primary:         #45136a;
  --color-primary-hover:   #360f52;
  --color-primary-active:  #270b3b;
  --color-primary-highlight: #e0d0f0;

  --color-accent:          #ee4a02;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 2px oklch(0.2 0.02 310 / 0.08);
  --shadow-md: 0 4px 12px oklch(0.2 0.02 310 / 0.10);
  --shadow-lg: 0 12px 32px oklch(0.2 0.02 310 / 0.14);

  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1160px;

  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body:    'Satoshi', 'Inter', sans-serif;
}

/* ============================================================
   DARK MODE COLOR PALETTE
============================================================ */
[data-theme="dark"] {
  --color-bg:              #100a18;
  --color-surface:         #170f22;
  --color-surface-2:       #1e152c;
  --color-surface-offset:  #1b1228;
  --color-surface-dynamic: #251a35;
  --color-divider:         #2e2040;
  --color-border:          #3d2e54;

  --color-text:            #ede8f5;
  --color-text-muted:      #9b8db0;
  --color-text-faint:      #5a4d6e;
  --color-text-inverse:    #100a18;

  --color-primary:         #c97af0;
  --color-primary-hover:   #b55fe0;
  --color-primary-active:  #9e44cc;
  --color-primary-highlight: #2e1a42;

  --color-accent:          #ff6a1f;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.4);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.55);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.65);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:              #100a18;
    --color-surface:         #170f22;
    --color-surface-2:       #1e152c;
    --color-surface-offset:  #1b1228;
    --color-surface-dynamic: #251a35;
    --color-divider:         #2e2040;
    --color-border:          #3d2e54;
    --color-text:            #ede8f5;
    --color-text-muted:      #9b8db0;
    --color-text-faint:      #5a4d6e;
    --color-text-inverse:    #100a18;
    --color-primary:         #c97af0;
    --color-primary-hover:   #b55fe0;
    --color-primary-active:  #9e44cc;
    --color-primary-highlight: #2e1a42;
    --color-accent:          #ff6a1f;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.4);
    --shadow-md: 0 4px 12px oklch(0 0 0 / 0.55);
    --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.65);
  }
}

/* ── Base ── */
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-16);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"], ol[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }

::selection {
  background: oklch(from var(--color-primary) l c h / 0.2);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

button { cursor: pointer; background: none; border: none; }

a, button, [role="button"] {
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive),
    opacity var(--transition-interactive);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0;
}

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

/* ── Skip link ── */
.skip-link {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transform: translateY(-120%);
  z-index: 100;
}
.skip-link:focus { transform: translateY(0); }

/* ── Nav ── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklch, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  gap: var(--space-4);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}
.nav-logo-mark {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}
.nav-logo-name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}
.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
}
.nav-links a:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}
.nav-links a.active {
  color: var(--color-primary);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  border: 1px solid transparent;
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
  border-color: var(--color-border);
}
.nav-mobile-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}
.nav-mobile-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* ── Hero ── */
.hero {
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
  border-bottom: 1px solid var(--color-divider);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-12);
  align-items: center;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}
.hero-eyebrow-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  flex-shrink: 0;
}
.hero-eyebrow-text {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.hero-name {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  line-height: 1.05;
}
.hero-tagline {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 52ch;
  line-height: 1.5;
  margin-bottom: var(--space-8);
}
.hero-tagline strong {
  color: var(--color-text);
  font-weight: 600;
}
.hero-ctas {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  text-decoration: none;
  border: 1px solid transparent;
  white-space: nowrap;
  min-height: 44px;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}
.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
}
.btn-ghost:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
  border-color: var(--color-text-faint);
}
.hero-avatar-wrap {
  position: relative;
}
.hero-avatar {
  width: 160px;
  height: 180px;
  border-radius: var(--radius-xl);
  background: var(--color-surface-dynamic);
  border: 1px solid var(--color-border);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.hero-avatar svg {
  width: 80px;
  height: 80px;
  color: var(--color-text-faint);
}

/* ── Section common ── */
.section {
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
  border-bottom: 1px solid var(--color-divider);
}
.section:last-of-type {
  border-bottom: none;
}
.section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-6);
}
.section-heading {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}
.section-subheading {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 58ch;
  margin-bottom: var(--space-10);
}

/* ── About ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}
.about-body p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: var(--space-4);
}
.about-body p:last-child { margin-bottom: 0; }
.about-body strong { color: var(--color-text); font-weight: 600; }
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
.stat-card {
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}
.stat-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: var(--space-1);
}
.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ── Competencies ── */
.competency-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(280px, 100%), 1fr));
  gap: var(--space-4);
}
.competency-card {
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}
.competency-card:hover {
  box-shadow: var(--shadow-md);
  border-color: oklch(from var(--color-text) l c h / 0.14);
}
.competency-icon {
  width: 36px;
  height: 36px;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.competency-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}
.competency-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.tag {
  font-size: var(--text-xs);
  font-weight: 500;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  background: var(--color-surface-offset);
  color: var(--color-text-muted);
  border: 1px solid oklch(from var(--color-text) l c h / 0.07);
}
.tag--primary {
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  border-color: transparent;
}

/* ── Experience ── */
.experience-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.exp-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0 var(--space-6);
  position: relative;
}
.exp-timeline {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: var(--space-1);
}
.exp-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  flex-shrink: 0;
  margin-top: 5px;
}
.exp-dot--muted {
  background: var(--color-surface-dynamic);
  border: 2px solid var(--color-border);
}
.exp-line {
  width: 1px;
  flex: 1;
  min-height: var(--space-8);
  background: var(--color-divider);
  margin-top: var(--space-2);
  margin-bottom: var(--space-2);
}
.exp-content {
  padding-bottom: var(--space-8);
}
.exp-item:last-child .exp-content {
  padding-bottom: 0;
}
.exp-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-2);
}
.exp-role {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
}
.exp-company {
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 500;
  margin-top: 2px;
}
.exp-period {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 500;
  white-space: nowrap;
  margin-top: 4px;
}
.exp-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-3);
}
.exp-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.exp-bullets li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  padding-left: var(--space-4);
  position: relative;
  max-width: 70ch;
}
.exp-bullets li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  border-radius: var(--radius-full);
  background: var(--color-text-faint);
}

/* ── Tools ── */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(140px, 100%), 1fr));
  gap: var(--space-3);
}
.tool-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: box-shadow var(--transition-interactive), border-color var(--transition-interactive), color var(--transition-interactive);
}
.tool-item:hover {
  color: var(--color-text);
  border-color: oklch(from var(--color-text) l c h / 0.14);
  box-shadow: var(--shadow-sm);
}
.tool-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

/* ── Certifications ── */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(260px, 100%), 1fr));
  gap: var(--space-4);
}
.cert-card {
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}
.cert-card:hover {
  box-shadow: var(--shadow-md);
  border-color: oklch(from var(--color-text) l c h / 0.14);
}
.cert-badge {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-primary-highlight);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-primary);
}
.cert-badge svg {
  width: 22px;
  height: 22px;
}
.cert-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}
.cert-issuer {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* ── Contact ── */
.contact-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.contact-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  min-height: 44px;
}
.contact-link:hover {
  color: var(--color-text);
  border-color: var(--color-text-faint);
  background: var(--color-surface-offset);
}
.contact-link svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ── Footer ── */
.site-footer {
  padding-block: var(--space-8);
  border-top: 1px solid var(--color-divider);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.footer-links {
  display: flex;
  gap: var(--space-4);
  list-style: none;
}
.footer-links a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
}
.footer-links a:hover {
  color: var(--color-text-muted);
}

/* ── Mobile ── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-divider);
    padding: var(--space-4);
    gap: var(--space-1);
    z-index: 49;
  }
  .nav-mobile-toggle { display: flex; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-avatar-wrap { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .exp-header { flex-direction: column; gap: var(--space-1); }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .hero-ctas { flex-direction: column; align-items: flex-start; }
  .hero-ctas .btn { width: 100%; justify-content: center; }
}