:root {
  --color-bg: #eaf0f6;
  --color-surface: #ffffff;
  --color-surface-alt: #f3f7fc;
  --color-text: #1f2f43;
  --color-muted: #526579;
  --color-primary: #e87a1f;
  --color-primary-dark: #c75f0f;
  --color-accent: #f59e0b;
  --color-header: #223345;
  --color-border: #d4dfea;
  --shadow-sm: 0 6px 16px rgba(31, 47, 67, 0.08);
  --shadow-md: 0 18px 36px rgba(31, 47, 67, 0.14);
  --radius: 12px;
  --max-width: 1120px;
  --font-sans: "Segoe UI", system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background:
    radial-gradient(circle at 10% 0%, #f7fbff 0%, rgba(247, 251, 255, 0) 42%),
    radial-gradient(circle at 90% 12%, rgba(232, 122, 31, 0.08) 0%, rgba(232, 122, 31, 0) 36%),
    var(--color-bg);
  line-height: 1.6;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  color: var(--color-primary-dark);
}

button,
a,
input,
textarea {
  transition: all 0.2s ease;
}

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(140deg, #1d2b3a, #283d52 55%, #334d65);
  border-bottom: 1px solid rgba(226, 232, 240, 0.14);
  box-shadow: 0 6px 18px rgba(17, 24, 39, 0.24);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
}

.brand {
  display: flex;
  align-items: center;
  color: #fff;
}

.brand:hover {
  color: #fff;
  opacity: 0.92;
}

.brand-logo {
  height: 42px;
  width: auto;
}

.nav-toggle {
  display: none;
  border: 1px solid rgba(203, 213, 225, 0.35);
  background: rgba(18, 28, 38, 0.75);
  color: #fff;
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
}

.nav-toggle:hover {
  background: rgba(29, 43, 58, 0.95);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-nav a {
  color: #e7edf5;
  font-weight: 500;
  font-size: 0.95rem;
}

.site-nav a:hover {
  color: var(--color-accent);
}

.site-nav a.active,
.site-nav a[aria-current="page"] {
  color: var(--color-accent);
}

.lang-switch {
  display: flex;
  gap: 0.25rem;
  border: 1px solid rgba(203, 213, 225, 0.3);
  border-radius: 999px;
  padding: 0.2rem;
  background: rgba(19, 30, 41, 0.72);
}

.lang-switch a {
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #94a3b8;
}

.lang-switch a.active {
  background: var(--color-primary);
  color: #fff;
}

.hero {
  padding: 4.5rem 0 3.5rem;
  background:
    radial-gradient(circle at 85% 14%, rgba(232, 122, 31, 0.18) 0%, rgba(232, 122, 31, 0) 34%),
    linear-gradient(145deg, #f7fbff 0%, #eaf1f8 48%, #e2ebf5 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2.5rem;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  margin: 0 0 1rem;
  letter-spacing: -0.03em;
}

.hero p {
  font-size: 1.1rem;
  color: var(--color-muted);
  margin: 0 0 1.5rem;
  max-width: 52ch;
}

.hero-card {
  background: linear-gradient(170deg, #ffffff, #f6f9fd 70%, #eff4fa);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
}

.hero-card h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
}

.hero-card ul {
  margin: 0;
  padding-left: 1.1rem;
}

.hero-card li {
  margin-bottom: 0.4rem;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 0.95rem;
  box-shadow: var(--shadow-sm);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #ee8c32);
  color: #fff;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-dark), #de7119);
  color: #fff;
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--color-surface-alt);
  color: #233447;
  border-color: #c6d3e0;
}

.btn-secondary:hover {
  background: #e7eef6;
  border-color: #adc0d2;
}

.section {
  padding: 4rem 0;
}

.section-header {
  margin-bottom: 2rem;
}

.section-header h2 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.section-header p {
  margin: 0;
  color: var(--color-muted);
  max-width: 60ch;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.card {
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.card:hover {
  border-color: #bdd0e1;
  transform: translateY(-2px);
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

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

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.project-card {
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.project-image {
  aspect-ratio: 16 / 10;
  background:
    radial-gradient(circle at 82% 20%, rgba(245, 158, 11, 0.38), rgba(245, 158, 11, 0) 45%),
    linear-gradient(140deg, #30465f, #3f5f7d);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #eff5fb;
  font-weight: 600;
  font-size: 0.9rem;
}

.project-gallery-trigger {
  width: 100%;
  border: 0;
  padding: 0;
  cursor: pointer;
}

.project-gallery-trigger:hover img,
.project-gallery-trigger:focus-visible img {
  transform: scale(1.02);
}

.project-gallery-trigger:focus-visible {
  outline: 3px solid rgba(245, 158, 11, 0.35);
  outline-offset: -3px;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.25s ease;
}

body.lightbox-open {
  overflow: hidden;
}

.portfolio-lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: rgba(15, 23, 42, 0.78);
  backdrop-filter: blur(6px);
}

.portfolio-lightbox.open {
  display: flex;
}

.portfolio-lightbox-dialog {
  position: relative;
  width: min(100%, 1080px);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
}

.portfolio-lightbox-stage {
  background: #102031;
  border: 1px solid rgba(212, 223, 234, 0.3);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 24px 48px rgba(15, 23, 42, 0.35);
}

.portfolio-lightbox-image {
  width: 100%;
  max-height: min(76vh, 760px);
  object-fit: contain;
  background: #102031;
}

.portfolio-lightbox-caption {
  padding: 0.9rem 1rem 1rem;
  color: #e7edf5;
  background: linear-gradient(180deg, rgba(16, 32, 49, 0.94), rgba(24, 44, 62, 0.98));
  font-size: 0.95rem;
}

.portfolio-lightbox-close,
.portfolio-lightbox-nav {
  border: 1px solid rgba(212, 223, 234, 0.34);
  background: rgba(19, 34, 49, 0.86);
  color: #ffffff;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.portfolio-lightbox-close:hover,
.portfolio-lightbox-nav:hover {
  background: rgba(38, 61, 83, 0.96);
}

.portfolio-lightbox-close {
  position: absolute;
  top: -0.75rem;
  right: -0.5rem;
  width: 2.5rem;
  height: 2.5rem;
  font-size: 1.5rem;
  line-height: 1;
}

.portfolio-lightbox-nav {
  width: 3rem;
  height: 3rem;
  font-size: 2rem;
  line-height: 1;
}

.portfolio-lightbox-nav:disabled {
  opacity: 0.45;
  cursor: default;
}

.project-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-body h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.project-body p {
  margin: 0 0 1rem;
  color: var(--color-muted);
  font-size: 0.95rem;
  flex: 1;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.tag {
  font-size: 0.75rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: #eff4fb;
  color: #35506b;
  border: 1px solid #cbd8e6;
}

.content-page {
  padding: 3rem 0 4rem;
}

.content-page h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
}

.prose {
  max-width: 70ch;
}

.prose p,
.prose li {
  color: var(--color-text);
}

.prose p {
  margin: 0 0 1rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2rem;
  align-items: start;
}

.contact-details {
  background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.contact-details h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

.contact-details p {
  margin: 0.4rem 0;
}

.form-card {
  background: linear-gradient(180deg, #ffffff 0%, #f6faff 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.form-grid {
  display: grid;
  gap: 1rem;
}

label {
  display: grid;
  gap: 0.35rem;
  font-weight: 500;
  font-size: 0.9rem;
}

input,
textarea {
  width: 100%;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font: inherit;
  background: #ffffff;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: #ef9a49;
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.22);
}

textarea {
  min-height: 140px;
  resize: vertical;
}

.checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-weight: 400;
  font-size: 0.9rem;
}

.checkbox-row input {
  width: auto;
  margin-top: 0.2rem;
}

.form-status {
  margin-top: 1rem;
  font-size: 0.9rem;
}

.form-status.success {
  color: #047857;
}

.form-status.error {
  color: #b91c1c;
}

.site-footer {
  background: linear-gradient(145deg, #1a2837, #22374a 60%, #2a465d);
  color: #d6e2ee;
  padding: 2.5rem 0;
  margin-top: 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2rem;
}

.site-footer h3 {
  color: #fff;
  margin: 0 0 0.75rem;
  font-size: 1rem;
}

.site-footer p,
.site-footer a {
  color: #d6e2ee;
  font-size: 0.9rem;
}

.site-footer a:hover {
  color: #ffd7ad;
}

.footer-bottom {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid #334155;
  font-size: 0.85rem;
  color: #94a3b8;
}

@media (max-width: 900px) {
  .hero-grid,
  .cards,
  .portfolio-grid,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: linear-gradient(180deg, #223345, #293e53);
    border-bottom: 1px solid rgba(203, 213, 225, 0.24);
    padding: 1rem;
  }

  .site-header.open .site-nav {
    display: flex;
  }

  .header-inner {
    position: relative;
    flex-wrap: wrap;
  }

  .portfolio-lightbox {
    padding: 1rem;
  }

  .portfolio-lightbox-dialog {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .portfolio-lightbox-close {
    top: 0.75rem;
    right: 0.75rem;
  }

  .portfolio-lightbox-nav {
    position: absolute;
    top: calc(50% - 2rem);
    z-index: 1;
  }

  .portfolio-lightbox-nav.prev {
    left: 0.5rem;
  }

  .portfolio-lightbox-nav.next {
    right: 0.5rem;
  }
}