/* ============================================
   PETBALANCE — Base / Reset / Common
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800&family=Noto+Sans+KR:wght@400;500;700;900&display=swap');

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-ko);
  font-size: var(--size-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body.no-scroll {
  overflow: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-en), var(--font-ko);
  line-height: 1.3;
}

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

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

button {
  font-family: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

/* ---- Layout ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--section-padding);
}

.section {
  position: relative;
}

/* ---- Section Header ---- */
.eyebrow {
  display: inline-block;
  font-family: var(--font-en);
  font-size: var(--size-sm);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-lg);
}

.section-title {
  font-size: var(--size-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin: 0.5rem 0 1rem;
}

.section-desc {
  font-size: var(--size-md);
  color: var(--color-text-sub);
  line-height: 1.7;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 2rem;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  font-family: var(--font-en);
  font-size: var(--size-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: var(--transition-base);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.btn-outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-outline:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* 어두운 배경(Hero 등) 위에서 쓰는 흰색 채움 버튼 */
.btn-white {
  background: var(--color-white);
  color: var(--color-primary-dark);
}

.btn-white:hover {
  background: var(--color-warm);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

/* ---- Scroll Reveal Animations ----
   JS(animations.js)가 IntersectionObserver로
   .is-visible 클래스를 부여하면 노출됩니다. */
.fade-up,
.fade-in {
  opacity: 0;
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.fade-up {
  transform: translateY(30px);
}

.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in.is-visible {
  opacity: 1;
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* ---- Accessibility ---- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

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