:root {
  --bg: #F5F6F8;
  --surface: #FFFFFF;
  --ink: #12161C;
  --ink-soft: #4A5568;
  --border: #E2E5EA;
  --accent: #3A5CE0;
  --accent-warm: #FF6B4A;
  --code-green: #2AA876;
  --terminal-bg: #12161C;
  --terminal-text: #E8ECF1;

  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --font-body: 'Inter', system-ui, sans-serif;
}

[data-theme="dark"] {
  --bg: #0D1117;
  --surface: #161B22;
  --ink: #E8ECF1;
  --ink-soft: #9AA5B1;
  --border: #2B3341;
  --accent: #7FA1FF;
  --accent-warm: #FF8B6E;
  --code-green: #3FD79A;
  --terminal-bg: #0A0D12;
  --terminal-text: #E8ECF1;
}

body,
.site-header,
.terminal-card,
.tag,
.contact-card,
.btn-ghost {
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
}

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

/* ---------- HEADER ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 28px;
}

nav ul li a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

nav ul li a:hover,
nav ul li a:focus-visible {
  color: var(--accent);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  margin-left: 20px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background-color: var(--surface);
  cursor: pointer;
  font-size: 1rem;
  padding: 0;
  position: relative;
}

.theme-toggle:hover {
  border-color: var(--accent);
}

.theme-icon {
  position: absolute;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.theme-icon-sun { opacity: 1; }
.theme-icon-moon { opacity: 0; }

[data-theme="dark"] .theme-icon-sun { opacity: 0; }
[data-theme="dark"] .theme-icon-moon { opacity: 1; }

/* ---------- LAYOUT ---------- */

main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  color: var(--accent);
  margin: 0 0 10px 0;
  font-weight: 500;
}

/* ---------- HERO ---------- */

.hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 48px;
  padding: 72px 0 64px;
}

.hero-text {
  flex: 1 1 380px;
}

.hero-text h1 {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.15;
  margin: 0 0 20px 0;
  letter-spacing: -0.01em;
}

.hero-desc {
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 46ch;
  margin: 0 0 28px 0;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-primary {
  background-color: var(--ink);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 12px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.15s ease;
}

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

.btn-primary:active {
  transform: translateY(1px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 12px 22px;
  border-radius: 8px;
  border: 1px solid var(--border);
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---------- TERMINAL CARD (signature element) ---------- */

.terminal-card {
  flex: 1 1 380px;
  max-width: 460px;
  background-color: var(--terminal-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 45px rgba(18, 22, 28, 0.25);
}

.terminal-titlebar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background-color: rgba(255, 255, 255, 0.06);
}

.dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
}

.dot-red { background-color: #FF5F56; }
.dot-yellow { background-color: #FFBD2E; }
.dot-green { background-color: #27C93F; }

.terminal-filename {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: rgba(232, 236, 241, 0.55);
}

.terminal-body {
  margin: 0;
  padding: 22px 20px 26px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--terminal-text);
  overflow-x: auto;
}

.tok-key { color: #7FB2FF; }
.tok-var { color: #E8ECF1; }
.tok-str { color: #FF9F7A; }

.cursor {
  display: inline-block;
  width: 7px;
  background-color: var(--code-green);
  animation: blink 1s step-start infinite;
}

@keyframes blink {
  50% { background-color: transparent; }
}

@media (prefers-reduced-motion: reduce) {
  .cursor {
    animation: none;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ---------- GENERIC CONTENT BLOCKS ---------- */

.block {
  padding: 56px 0;
  border-top: 1px solid var(--border);
}

.block h2 {
  font-size: 1.6rem;
  margin: 0 0 20px 0;
  letter-spacing: -0.01em;
}

.block p {
  color: var(--ink-soft);
  max-width: 68ch;
}

/* ---------- TAGS ---------- */

.tag-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 16px;
  color: var(--ink);
}

/* ---------- KONTAK ---------- */

.contact-card {
  display: flex;
  align-items: center;
  gap: 24px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.profile-photo,
.avatar-fallback {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.avatar-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--ink);
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.4rem;
}

.contact-details p {
  margin: 4px 0;
  color: var(--ink);
}

.contact-details .label {
  display: inline-block;
  min-width: 70px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}

/* ---------- FOOTER ---------- */

footer {
  text-align: center;
  padding: 28px 24px;
  color: var(--ink-soft);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

/* ---------- RESPONSIVE ---------- */

@media (max-width: 640px) {
  .header-inner {
    flex-direction: column;
    gap: 12px;
  }

  .hero {
    padding: 40px 0;
  }

  .contact-card {
    flex-direction: column;
    text-align: center;
  }

  .contact-details .label {
    display: block;
  } 
}

/* ---------- ACCESSIBILITY ---------- */

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