:root {
  --bg: #1a1a18;
  --surface: #232320;
  --text: #e8e6e1;
  --muted: #9a978f;
  --accent: #d98c4a;
  --border: rgba(232, 230, 225, 0.15);
  --focus-ring: rgba(217, 140, 74, 0.45);
  --shadow-soft: 0 10px 28px rgba(0, 0, 0, 0.22);
  --pattern-opacity: 0.11;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;
}

[data-theme="light"] {
  --bg: #f4f2ee;
  --surface: #ffffff;
  --text: #1d1c1a;
  --muted: #5c5952;
  --accent: #b66a2e;
  --border: rgba(29, 28, 26, 0.16);
  --focus-ring: rgba(182, 106, 46, 0.35);
  --shadow-soft: 0 10px 20px rgba(20, 20, 20, 0.08);
  --pattern-opacity: 0.045;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", "Roboto", "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg);
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("assets/wave-pattern.png");
  background-size: 680px auto;
  background-repeat: repeat;
  background-position: center top;
  opacity: var(--pattern-opacity);
  pointer-events: none;
  z-index: 0;
}

body > * {
  position: relative;
  z-index: 1;
}

.content-shell {
  max-width: 1100px;
  padding-left: var(--space-3);
  padding-right: var(--space-3);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: var(--space-2);
  z-index: 1000;
  padding: var(--space-1) var(--space-2);
  background: var(--accent);
  color: #1b130a;
  border-radius: 8px;
}

.skip-link:focus-visible {
  left: var(--space-2);
}

.portfolio-nav {
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.brand-mark {
  letter-spacing: 0.02em;
  font-weight: 600;
}

.portfolio-nav .navbar-brand {
  color: var(--text);
}

.portfolio-nav .navbar-brand:hover,
.portfolio-nav .navbar-brand:focus-visible {
  color: var(--text);
}

.portfolio-nav .nav-link {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.74rem;
  padding: var(--space-2) var(--space-2);
}

.portfolio-nav .nav-link.active,
.portfolio-nav .nav-link:hover,
.portfolio-nav .nav-link:focus-visible {
  color: var(--accent);
}

.section-space {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}

.hero-section {
  padding-top: calc(var(--space-7) + var(--space-4));
}

.eyebrow {
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  font-size: 0.75rem;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3rem);
  line-height: 1.1;
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.hero-copy {
  color: var(--muted);
  max-width: 60ch;
}

.portrait-frame {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: var(--space-2);
  background: var(--surface);
}

.portrait-photo {
  width: 100%;
  max-height: 620px;
  object-fit: cover;
  object-position: center 28%;
}

.btn {
  border-radius: 10px;
  padding: 0.55rem 1rem;
}

.link-buttons .btn,
.portfolio-nav .btn-outline-accent {
  position: relative;
  overflow: hidden;
  border-radius: 20px;
  backdrop-filter: blur(14px) saturate(130%);
  -webkit-backdrop-filter: blur(14px) saturate(130%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.12),
    inset 0 -1px 0 rgba(0, 0, 0, 0.18),
    0 8px 24px rgba(0, 0, 0, 0.22);
  transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease, background-color 150ms ease, color 150ms ease;
}

.link-buttons .btn::before,
.portfolio-nav .btn-outline-accent::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.24) 0%,
    rgba(255, 255, 255, 0.08) 34%,
    rgba(255, 255, 255, 0) 68%
  );
}

.link-buttons .btn:hover,
.link-buttons .btn:focus-visible,
.portfolio-nav .btn-outline-accent:hover,
.portfolio-nav .btn-outline-accent:focus-visible {
  transform: translateY(-1px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.16),
    inset 0 -1px 0 rgba(0, 0, 0, 0.2),
    0 10px 28px rgba(0, 0, 0, 0.28);
}

.btn-accent {
  background: color-mix(in srgb, var(--accent) 82%, transparent);
  color: #1e1409;
  border: 1px solid color-mix(in srgb, var(--accent) 72%, white 10%);
}

.btn-accent:hover,
.btn-accent:focus-visible {
  background: color-mix(in srgb, var(--accent) 88%, black);
  color: #1e1409;
}

.btn-outline-accent {
  border: 1px solid color-mix(in srgb, var(--text) 18%, transparent);
  color: var(--text);
  background: color-mix(in srgb, var(--surface) 50%, transparent);
}

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

.section-title {
  font-size: clamp(1.4rem, 3vw, 1.5rem);
  font-weight: 600;
}

.accordion-item,
.project-card,
.contact-form,
.github-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}

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

.accordion-button:not(.collapsed) {
  background: color-mix(in srgb, var(--surface) 88%, var(--accent));
  color: var(--text);
  box-shadow: inset 0 -1px 0 var(--border);
}

.accordion-body {
  color: var(--text);
}

.accordion-button:focus {
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.project-card {
  padding: var(--space-4);
  transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease;
}

.project-card:hover,
.project-card:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}

.project-title {
  font-size: 1.15rem;
  margin-bottom: var(--space-2);
}

.project-text,
.text-muted-custom {
  color: var(--muted);
}

a {
  color: var(--accent);
}

a:hover {
  color: color-mix(in srgb, var(--accent) 84%, white);
}

.carousel-item img {
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: var(--surface);
}

.carousel-image {
  min-height: 360px;
  max-height: 560px;
  width: 100%;
  padding: var(--space-2);
  background: #171715;
}

.project-caption {
  right: 0;
  left: 0;
  bottom: 0;
  margin: 0;
  padding: var(--space-3);
  text-align: center;
  background: linear-gradient(180deg, rgba(26, 26, 24, 0) 0%, rgba(26, 26, 24, 0.88) 70%);
}

.project-caption h3 {
  margin: 0;
  color: var(--text);
  font-size: clamp(1.15rem, 3vw, 1.6rem);
}

.carousel-control-prev:focus-visible,
.carousel-control-next:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: -3px;
  background: rgba(0, 0, 0, 0.22);
}

.subsection-title {
  font-size: 1.12rem;
  margin-bottom: var(--space-1);
}

.repo-list {
  list-style: none;
  padding-left: 0;
  margin-bottom: 0;
  display: grid;
  gap: var(--space-2);
}

.repo-list li {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: var(--space-2);
  background: color-mix(in srgb, var(--surface) 94%, transparent);
}

.repo-list small {
  color: var(--muted);
}

.contact-form {
  padding: var(--space-4);
}

.form-label {
  margin-bottom: var(--space-1);
}

.form-control {
  background-color: color-mix(in srgb, var(--surface) 92%, transparent);
  border: 1px solid var(--border);
  color: var(--text);
}

.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--focus-ring);
  background-color: var(--surface);
  color: var(--text);
}

.form-control::placeholder {
  color: var(--muted);
}

.form-control.is-invalid {
  border-color: #d85e5e;
}

.form-status {
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: var(--space-4) 0;
  color: var(--muted);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (max-width: 768px) {
  .section-space {
    padding-top: var(--space-6);
    padding-bottom: var(--space-6);
  }

  .hero-section {
    padding-top: var(--space-6);
  }

  .content-shell {
    padding-left: var(--space-2);
    padding-right: var(--space-2);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition-duration: 0ms !important;
    animation-duration: 0ms !important;
  }
}