:root {
  --bg: #050509;
  --bg-alt: #101018;
  --accent: #fbbf24;
  --accent-soft: rgba(251, 191, 36, 0.15);
  --text: #f9fafb;
  --muted: #9ca3af;
  --border: #1f2933;
  --card-bg: #0b0b12;
  --radius-lg: 1.5rem;
  --radius-md: 1rem;
  --shadow-soft: 0 20px 45px rgba(0, 0, 0, 0.6);
  --max-width: 1120px;
}

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

html,
body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, #1f2937 0, #020617 55%, #000000 100%);
  color: var(--text);
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
}

/* Layout helpers */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: 5rem 0;
}

.section-alt {
  background: radial-gradient(circle at top, #111827 0, #020617 55%);
}

.center {
  text-align: center;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(3, 7, 18, 0.95), rgba(3, 7, 18, 0.7));
  border-bottom: 1px solid rgba(148, 163, 184, 0.25);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0.5rem;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  border: 1px solid rgba(249, 250, 251, 0.3);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: radial-gradient(circle at 30% 0, #fbbf24 0, #1f2937 40%, #020617 100%);
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.8), 0 0 30px rgba(251, 191, 36, 0.25);
}

.brand-text {
  font-weight: 600;
  letter-spacing: 0.07em;
  font-size: 0.8rem;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.9rem;
}

.main-nav a {
  text-decoration: none;
  color: var(--muted);
  position: relative;
  padding: 0.25rem 0;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: linear-gradient(to right, var(--accent), #f97316);
  transition: width 0.22s ease;
}

.main-nav a:hover {
  color: var(--text);
}

.main-nav a:hover::after {
  width: 100%;
}

/* Language switch */

.lang-switch {
  display: flex;
  gap: 0.25rem;
  background: rgba(15, 23, 42, 0.8);
  padding: 0.15rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
}

.lang-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 0.7rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  cursor: pointer;
}

.lang-btn.active {
  background: var(--accent-soft);
  color: var(--text);
}

/* Hero */

.hero {
  padding: 5rem 0 4rem;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(2.1rem, 4vw, 2.8rem);
  line-height: 1.1;
  margin-bottom: 1rem;
}

.hero-text p {
  margin: 0 0 1.75rem;
  color: var(--muted);
  max-width: 32rem;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-frame {
  width: 100%;
  max-width: 360px;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at 30% 0, #fbbf24 0, #0f172a 40%, #020617 100%);
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 1.25rem;
}

.hero-frame span {
  font-size: 0.8rem;
  color: rgba(15, 23, 42, 0.9);
  background: rgba(249, 250, 251, 0.85);
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
}

/* Buttons */

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  border: none;
  background: linear-gradient(to right, var(--accent), #f97316);
  color: #020617;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 16px 35px rgba(15, 23, 42, 0.7);
  transform: translateY(0);
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.8);
  filter: brightness(1.02);
}

/* Two-column layout */

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 2.5rem;
  align-items: start;
}

/* About */

.about-details {
  display: grid;
  gap: 1rem;
}

.about-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 1rem 1.1rem;
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.about-card .label {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.about-card .value {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.9rem;
}

/* Services */

.cards-grid {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
}

.card {
  background: rgba(15, 23, 42, 0.95);
  border-radius: var(--radius-md);
  padding: 1.4rem 1.3rem;
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.65);
}

.card h3 {
  margin: 0 0 0.6rem;
  font-size: 1rem;
}

.card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.note {
  margin-top: 1.75rem;
  font-size: 0.9rem;
  color: var(--muted);
}

/* Portfolio */

.portfolio-grid {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.25rem;
}

.portfolio-item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.85rem;
}

.portfolio-item .placeholder {
  border-radius: 1rem;
  aspect-ratio: 4 / 3;
  background: repeating-linear-gradient(
    135deg,
    rgba(148, 163, 184, 0.25),
    rgba(148, 163, 184, 0.25) 6px,
    rgba(15, 23, 42, 0.7) 6px,
    rgba(15, 23, 42, 0.7) 12px
  );
  border: 1px dashed rgba(148, 163, 184, 0.7);
}

/* Contact */

.contact-list {
  list-style: none;
  padding: 0;
  margin: 1.25rem 0 0;
  display: grid;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.contact-list a {
  color: var(--accent);
  text-decoration: none;
}

.contact-list a:hover {
  text-decoration: underline;
}

.contact-form {
  background: rgba(15, 23, 42, 0.95);
  padding: 1.5rem 1.4rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.3);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.7);
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 0.3rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.55rem 0.6rem;
  border-radius: 0.7rem;
  border: 1px solid rgba(148, 163, 184, 0.7);
  background: rgba(15, 23, 42, 0.8);
  color: var(--text);
  font-size: 0.9rem;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: 1px solid var(--accent);
  border-color: var(--accent);
}

.small-note {
  margin-top: 0.75rem;
  font-size: 0.78rem;
  color: var(--muted);
}

/* Footer */

.site-footer {
  border-top: 1px solid rgba(30, 64, 175, 0.5);
  background: #020617;
  padding: 1.25rem 0;
}

.footer-inner {
  font-size: 0.78rem;
  color: var(--muted);
  text-align: center;
}

/* Responsive */

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .two-column {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .main-nav {
    display: none;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 3.25rem 0;
  }

  .cards-grid,
  .portfolio-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero {
    padding-top: 4rem;
  }

  .header-inner {
    padding-inline: 0.25rem;
  }
}