/* ===== Tokens ===== */
:root {
  --bg: #0a0a0c;
  --bg-elevated: #131316;
  --ink: #f3f3f1;
  --ink-dim: #8d8d95;
  --line: #242429;
  --line-strong: #38383f;
  --white: #ffffff;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --header-h: 72px;
  --max: 880px;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--white);
  outline-offset: 3px;
}

/* ===== Header ===== */
header {
  position: fixed;
  top: 0;
  width: 100%;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  background: rgba(10, 10, 12, 0.8);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  z-index: 100;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.logo-mark {
  width: 30px;
  height: 30px;
}

.nav-links {
  display: flex;
  gap: 32px;
  font-size: 0.9rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--ink-dim);
  position: relative;
  transition: color 0.2s;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 1px;
  background: var(--white);
  transition: width 0.2s ease;
}

.nav-links a:hover {
  color: var(--ink);
}

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

.btn-nav {
  padding: 9px 20px;
  font-size: 0.85rem;
}

/* ===== Sections ===== */
section {
  padding: 96px 24px;
  max-width: var(--max);
  margin: 0 auto;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 18px;
}

.eyebrow-center {
  text-align: center;
}

h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-align: center;
  margin-bottom: 48px;
}

/* ===== Hero ===== */
#home {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100vh;
  max-width: 1040px;
  overflow: hidden;
}

.hero-watermark {
  position: absolute;
  top: 50%;
  right: -15px;
  transform: translateY(-50%);
  width: 480px;
  height: auto;
  opacity: 0.09;
  pointer-events: none;
  user-select: none;
}

.hero-inner {
  position: relative;
  padding-top: var(--header-h);
  max-width: 620px;
}

#home h1 {
  font-family: var(--font-display);
  font-size: 3.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-by {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--ink-dim);
  margin-bottom: 24px;
}

.hero-lead {
  font-size: 1.1rem;
  color: var(--ink-dim);
  margin-bottom: 36px;
  max-width: 480px;
}

.hero-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 4px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.92rem;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
}

.btn-primary {
  background: var(--white);
  color: #0a0a0c;
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: #e4e4e2;
}

.btn-ghost,
.btn-nav {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line-strong);
}

.btn-ghost:hover,
.btn-nav:hover {
  border-color: var(--white);
}

/* ===== Divider ===== */
.divider {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
}

.divider span {
  flex: 1;
  height: 1px;
  background: var(--line);
  position: relative;
}

.divider span::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: 5px;
  height: 5px;
  transform: translate(-50%, -50%) rotate(45deg);
  background: var(--line-strong);
}

/* ===== Projects ===== */
.projects {
  display: flex;
  flex-direction: column;
}

.project {
  padding: 32px 0;
  border-top: 1px solid var(--line);
}

.project:last-child {
  border-bottom: 1px solid var(--line);
}

.project-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.project-head h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
}

.project-status {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.project p {
  color: var(--ink-dim);
  font-size: 0.96rem;
  max-width: 640px;
  margin-bottom: 18px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.project-tags span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  padding: 5px 12px;
  border-radius: 3px;
}

/* ===== About ===== */
.about-text {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 44px;
  color: var(--ink-dim);
  font-size: 1rem;
}

.skills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.skill {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  padding: 9px 18px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  transition: border-color 0.2s;
}

.skill:hover {
  border-color: var(--white);
}

/* ===== Contact ===== */
form {
  max-width: 520px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

form input,
form textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-elevated);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 4px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

form input::placeholder,
form textarea::placeholder {
  color: var(--ink-dim);
}

form input:focus,
form textarea:focus {
  border-color: var(--white);
}

form button {
  background: var(--white);
  color: #0a0a0c;
  padding: 14px;
  border: none;
  border-radius: 4px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}

form button:hover {
  background: #e4e4e2;
}

/* ===== Footer ===== */
footer {
  text-align: center;
  padding: 40px 24px;
  border-top: 1px solid var(--line);
  color: var(--ink-dim);
  font-size: 0.85rem;
}

.footer-mark {
  width: 32px;
  height: 32px;
  opacity: 0.85;
  margin-bottom: 14px;
}

.footer-links {
  margin-top: 10px;
  display: flex;
  justify-content: center;
  gap: 20px;
}

.footer-links a {
  color: var(--ink-dim);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--ink);
}

/* ===== Reveal Animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Mobile ===== */
@media (max-width: 720px) {
  .nav-links {
    display: none;
  }

  header {
    padding: 0 18px;
  }

  .btn-nav {
    padding: 7px 16px;
    font-size: 0.8rem;
  }

  #home h1 {
    font-size: 2.2rem;
  }

  .hero-watermark {
    width: 300px;
    right: -80px;
    opacity: 0.05;
  }

  section {
    padding: 72px 20px;
  }

  .hero-links {
    flex-wrap: wrap;
  }

  .project-head {
    flex-direction: column;
    align-items: flex-start;
  }
}