/* ============================================================
   Amber's Portfolio — design tokens + base
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:opsz,wght@9..40,400;9..40,500;9..40,600;9..40,700&family=Fraunces:opsz,wght,SOFT@9..144,300..900,0..100&family=IBM+Plex+Serif:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400;1,500;1,600&family=Inter:wght@300;400;500;600;700&family=Geist+Mono:wght@400;500&display=swap');
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css');

:root {
  /* Type stacks */
  --font-display: 'Fraunces', 'IBM Plex Serif', 'Times New Roman', serif;
  --font-serif: 'IBM Plex Serif', 'Times New Roman', serif;
  --font-sans: 'Inter', 'Pretendard', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
  --font-mono: 'Geist Mono', 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --font-kr: 'Pretendard', 'Noto Sans KR', sans-serif;

  /* Colors */
  --bg: #ffffff;
  --bg-soft: #fbfaf9;
  --bg-tint: #f5f3f0;
  --fg: #0a0a0a;
  --fg-2: #1a1a1a;
  --fg-3: #383839;
  --muted: #737373;
  --muted-2: #959697;
  --muted-3: #a3a3a3;
  --line: #e2e0e0;
  --line-2: #d9dbde;
  --line-3: #ededed;

  /* Accents */
  --accent: #3b2e53;
  --accent-hover: #2b2040;
  --tag-green: #56c283;
  --tag-pink: #e31675;
  --tag-blue: #4b41d0;

  /* Layout */
  --max-w: 1280px;
  --gutter: 64px;
  --col-gap: 32px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast: 200ms;
  --t-med: 400ms;
  --t-slow: 700ms;
}

/* ============================================================
   Reset
   ============================================================ */

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.55;
  color: var(--fg);
  background: var(--bg);
  letter-spacing: -0.005em;
  /* page-load fade */
  opacity: 0;
  animation: pageIn 500ms var(--ease-out) forwards;
}

body.is-leaving {
  opacity: 1;
  animation: pageOut 220ms var(--ease) forwards;
}

@keyframes pageIn  { from { opacity: 0; } to { opacity: 1; } }
@keyframes pageOut { from { opacity: 1; } to { opacity: 0; } }

a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 0;
}
img, svg { display: block; max-width: 100%; }

::selection { background: var(--accent); color: #fff; }

/* ============================================================
   Layout primitives — technical grid
   ============================================================ */

.wrap {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* Grid frame — subtle vertical guideline borders */
.grid-frame {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  display: flex;
  justify-content: center;
}
.grid-frame::before,
.grid-frame::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--line);
  opacity: 0.6;
}
.grid-frame::before { left: var(--gutter); }
.grid-frame::after { right: var(--gutter); }

.section {
  position: relative;
  padding: 120px 0;
  z-index: 2;
}
.section--soft { background: var(--bg-soft); }
.section--tight { padding: 80px 0; }

/* Section header / numbered label */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 400;
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
}
.eyebrow .dash {
  display: inline-block;
  width: 22px;
  height: 1px;
  background: var(--muted-2);
  transform: translateY(-3px);
}

/* Two-column structure */
.split {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--col-gap);
  align-items: start;
}

/* ============================================================
   Typography
   ============================================================ */

.h-display {
  font-family: var(--font-display);
  font-weight: 400;
  font-variation-settings: "opsz" 144, "SOFT" 0;
  font-size: clamp(36px, 6.2vw, 72px);
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--fg);
  margin: 0;
}
.h-display em {
  font-style: italic;
  font-variation-settings: "opsz" 144, "SOFT" 100;
  color: var(--fg-2);
}

.h-serif {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(24px, 2.8vw, 36px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--fg);
}

.h-serif--italic {
  font-style: italic;
  font-weight: 500;
}

.h-sans {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 16px;
  line-height: 1.3;
  margin: 0;
  color: var(--fg-2);
  letter-spacing: -0.01em;
}

.lead {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  color: var(--muted);
  max-width: 60ch;
  margin: 0;
}

.mono {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.01em;
}

/* Soft fade-in primitive */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out);
  will-change: opacity, transform;
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}
.reveal[data-delay="1"] { transition-delay: 80ms; }
.reveal[data-delay="2"] { transition-delay: 160ms; }
.reveal[data-delay="3"] { transition-delay: 240ms; }
.reveal[data-delay="4"] { transition-delay: 320ms; }
.reveal[data-delay="5"] { transition-delay: 400ms; }

/* ============================================================
   Floating bottom nav (section anchors)
   ============================================================ */

.floatnav {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  box-shadow:
    0 12px 32px rgba(0, 0, 0, 0.06),
    0 2px 6px rgba(0, 0, 0, 0.04);
  opacity: 0;
  pointer-events: none;
  transition: opacity 320ms var(--ease), transform 420ms var(--ease-out);
}
.floatnav.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}
.floatnav__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  font-family: 'DM Sans', var(--font-sans);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: -0.005em;
  line-height: 1;
  color: var(--muted);
  border-radius: 999px;
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
  white-space: nowrap;
}
.floatnav__item svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
  opacity: 0.85;
}
.floatnav__item:hover {
  color: var(--fg-2);
  background: rgba(0, 0, 0, 0.035);
}
.floatnav__item.is-current {
  background: var(--fg);
  color: #fff;
}
.floatnav__item.is-current:hover { background: var(--fg); color: #fff; }
.floatnav__item.is-current svg { opacity: 1; }

@media (max-width: 640px) {
  .floatnav { gap: 0; padding: 3px; bottom: 16px; }
  .floatnav__item { padding: 8px 10px; font-size: 12px; gap: 0; }
  .floatnav__label { display: none; }
  .floatnav__item svg { width: 15px; height: 15px; }
}

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 18px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(to bottom, rgba(255,255,255,0.92) 0%, rgba(255,255,255,0.6) 60%, rgba(255,255,255,0) 100%);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-serif);
  font-weight: 500;
  font-style: italic;
  font-size: 17px;
  letter-spacing: -0.04em;
  color: var(--fg);
}
.nav__brand img {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
}
.nav__links {
  display: flex;
  gap: 8px;
  align-items: center;
}
.nav__link {
  position: relative;
  padding: 9px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--fg-3);
  border-radius: 6px;
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.nav__link:hover { color: var(--fg); background: rgba(0,0,0,0.04); }
.nav__link.is-active {
  background: var(--bg-tint);
  color: var(--fg);
}

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 20px;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: -0.005em;
  line-height: 1;
  transition: background var(--t-fast) var(--ease),
              transform var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
  cursor: pointer;
}
.btn--primary {
  background: var(--accent);
  color: #fff;
}
.btn--primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}
.btn--ghost {
  background: transparent;
  border: 1px solid rgba(122,111,140,0.5);
  color: var(--fg);
}
.btn--ghost:hover {
  border-color: var(--fg);
  background: rgba(0,0,0,0.02);
}
.btn .arrow {
  transition: transform var(--t-fast) var(--ease);
}
.btn:hover .arrow { transform: translateX(3px); }

/* ============================================================
   Footer
   ============================================================ */

.footer {
  position: relative;
  z-index: 2;
  background: var(--bg-soft);
  padding: 100px 0 80px;
  border-top: 1px solid var(--line);
}
.footer__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 80px;
  padding: 56px 0;
  border-top: 1px solid var(--line-3);
  border-bottom: 1px solid var(--line-3);
}
.footer__brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 28px;
}
.footer__brand-name {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--fg);
}
.footer__brand-sub {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 15px;
  color: rgba(0,0,0,0.55);
}
.footer__contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 15px;
}
.footer__contact a {
  font-weight: 600;
  color: var(--fg);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-fast) var(--ease);
}
.footer__contact a:hover { border-color: var(--fg); }
.footer__phone { color: rgba(0,0,0,0.55); font-weight: 500; }
.footer__social {
  display: flex;
  gap: 18px;
  margin-top: 28px;
}
.footer__social a {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  color: rgba(0,0,0,0.45);
  transition: color var(--t-fast) var(--ease);
}
.footer__social a:hover { color: var(--fg); }
.footer__right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: space-between;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  gap: 24px;
}
.footer__copy {
  margin-top: 40px;
  font-size: 12px;
  color: var(--muted-3);
  font-weight: 300;
  letter-spacing: -0.005em;
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 1024px) {
  :root { --gutter: 40px; --col-gap: 24px; }
  .section { padding: 96px 0; }
  .split { grid-template-columns: 160px 1fr; }
}

@media (max-width: 768px) {
  :root { --gutter: 24px; }
  .section { padding: 72px 0; }
  .grid-frame::before, .grid-frame::after { display: none; }
  .split { grid-template-columns: 1fr; gap: 24px; }
  .nav { padding: 14px 24px; }
  .footer__inner { grid-template-columns: 1fr; gap: 40px; }
  .footer__right { align-items: flex-start; text-align: left; }
}