/* =============================================================
   홍다경 Portfolio — Design Tokens
   Theme: "유쾌한 환경 / 행동하는 청년"
   Font:  Pretendard (Apple 기본체 느낌, 크로스플랫폼)
   Color: Lime accent + Deep-forest ink + Warm off-white + Coral
   ============================================================= */

/* ---- Web font (Pretendard, CDN) -----------------------------
   Load once in <head> before this file:
   <link rel="stylesheet"
     href="https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css">
   ------------------------------------------------------------- */

:root {
  /* ---------- Brand palette ---------- */
  --color-lime:        #E9FF70;  /* signature accent — 다경님 픽 */
  --color-lime-deep:   #CDE94B;  /* hover / pressed state for lime */
  --color-coral:       #EF9E78;  /* secondary accent — 발랄/하이텐션 */
  --color-coral-deep:  #E5835A;  /* coral hover */

  /* ---------- Neutral base ---------- */
  --color-ink:         #16201A;  /* near-black w/ green undertone — 다크 섹션, 본문 */
  --color-ink-soft:    #243029;  /* raised dark surfaces (cards on dark) */
  --color-paper:       #FBFBF4;  /* warm off-white — 메인 배경 */
  --color-paper-soft:  #F2F2E8;  /* subtle card / section tint on light */
  --color-subtext:     #5C6B60;  /* gray-green secondary text */
  --color-line:        #E2E3D6;  /* hairline borders on light */
  --color-line-dark:   #33402F;  /* hairline borders on dark */

  /* ---------- Text-on-color (contrast-safe) ----------
     라임/코랄 위에는 흰 글씨 금지(대비 탈락) → 다크 잉크만 */
  --on-lime:           var(--color-ink);
  --on-coral:          var(--color-ink);
  --on-ink:            var(--color-paper);

  /* ---------- Typography ---------- */
  --font-sans: "Pretendard", -apple-system, BlinkMacSystemFont,
               "Apple SD Gothic Neo", "Nanum Gothic", "Malgun Gothic",
               system-ui, sans-serif;

  /* type scale (1.25 ratio, 16px base) */
  --fs-display: clamp(2.5rem, 6vw, 4.5rem);  /* 랜딩 헤드라인 */
  --fs-h1:      clamp(2rem, 4vw, 3rem);
  --fs-h2:      clamp(1.5rem, 3vw, 2.25rem);
  --fs-h3:      1.5rem;
  --fs-body:    1rem;
  --fs-small:   0.875rem;

  --fw-light:   300;
  --fw-regular: 400;
  --fw-medium:  500;
  --fw-semibold:600;
  --fw-bold:    700;
  --fw-extra:   800;

  --lh-tight:   1.15;
  --lh-snug:    1.35;
  --lh-body:    1.7;
  --ls-tight:  -0.02em;  /* 큰 제목 자간 좁힘 */

  /* ---------- Spacing / radius / shadow ---------- */
  --space-1: 0.25rem;  --space-2: 0.5rem;  --space-3: 0.75rem;
  --space-4: 1rem;     --space-6: 1.5rem;  --space-8: 2rem;
  --space-12: 3rem;    --space-16: 4rem;   --space-24: 6rem;

  --radius-sm: 6px;  --radius-md: 12px;  --radius-lg: 20px;  --radius-pill: 999px;

  --shadow-sm: 0 1px 3px rgba(22, 32, 26, 0.08);
  --shadow-md: 0 8px 24px rgba(22, 32, 26, 0.10);

  --container: 1200px;
}

/* ---------- Base reset / element defaults ---------- */
* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 68px;            /* sticky nav 보정 */
  scroll-snap-type: y proximity;       /* proximity: 양 끝에서 가두지 않음 (mandatory는 경계 트랩 발생) */
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; scroll-snap-type: none; }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-weight: var(--fw-regular);
  color: var(--color-ink);
  background: var(--color-paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  font-weight: var(--fw-bold);
  margin: 0 0 var(--space-4);
}

a { color: inherit; text-decoration: none; }

/* ---------- Reusable accent helpers ---------- */
.accent-lime  { color: var(--color-ink); background: var(--color-lime); }
.accent-coral { color: var(--color-ink); background: var(--color-coral); }
.section-dark { color: var(--color-paper); background: var(--color-ink); }

/* highlight 텍스트 — 라임 형광펜 효과 */
.mark {
  background: linear-gradient(transparent 55%, var(--color-lime) 55%);
  padding: 0 0.1em;
}

/* CTA 버튼 (라임) */
.btn {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-pill);
  font-weight: var(--fw-semibold);
  border: none; cursor: pointer;
  transition: background-color .15s ease, transform .15s ease;
}
.btn-lime  { background: var(--color-lime);  color: var(--on-lime); }
.btn-lime:hover  { background: var(--color-lime-deep);  transform: translateY(-1px); }
.btn-coral { background: var(--color-coral); color: var(--on-coral); }
.btn-coral:hover { background: var(--color-coral-deep); transform: translateY(-1px); }

/* 다크 배경 위 outline 버튼 */
.btn-ghost {
  background: transparent; color: var(--color-paper);
  border: 1.5px solid var(--color-line-dark);
}
.btn-ghost:hover { border-color: var(--color-lime); color: var(--color-lime); }
