/* 웹폰트 적용 (깔끔하고 모던한 Pretendard 폰트) */
@import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.8/dist/web/static/pretendard.css");

/* 중보노트 브랜드 컬러 및 변수 정의 */
:root {
  --color-primary: #389E9E;
  --color-primary-light: #EAF4F4;
  --color-accent: #F08A73;
  --color-accent-light: #FDE7E3;
  --color-bg: #F4F6F8;
  --color-surface: #FFFFFF;
  --color-text-main: #222222;
  --color-text-sub: #777777;
  --color-border: #E5E8EB;
  --radius-card: 16px;
  --radius-button: 12px;
  --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.05);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Pretendard", -apple-system, BlinkMacSystemFont, system-ui, Roboto,
    "Helvetica Neue", "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR",
    "Malgun Gothic", sans-serif;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text-main);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
}

/* 메인 컨테이너 (모바일 화면처럼 중앙 정렬 및 너비 제한) */
.container {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  background-color: var(--color-surface);
  min-height: 100vh;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.03);
  padding: 56px 24px;
  padding-left: max(24px, env(safe-area-inset-left));
  padding-right: max(24px, env(safe-area-inset-right));
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* 타이포그래피 */
h1, h2, h3 {
  color: var(--color-text-main);
  word-break: keep-all;
}

.title {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 12px;
  text-align: center;
}

.subtitle {
  font-size: 16px;
  color: var(--color-text-sub);
  margin-bottom: 40px;
  line-height: 1.5;
  text-align: center;
}

/* 카드 컴포넌트 */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

/* 버튼 스타일 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 18px 24px;
  font-size: 17px;
  font-weight: 600;
  border-radius: var(--radius-button);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

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

.btn-primary:hover {
  background-color: #2F8888;
}

.btn-accent {
  background-color: var(--color-accent);
  color: #FFFFFF;
}

.btn-accent:hover {
  background-color: #E07861;
}

.btn-secondary {
  background-color: var(--color-border);
  color: var(--color-text-main);
}

.btn-secondary:hover {
  background-color: #D5DDE3;
}

/* 플레이스토어 뱃지 이미지 스타일 */
.playstore-badge {
  display: block;
  margin: 32px auto 0;
  width: auto;
  height: 60px;
}

/* 중앙 정렬용 */
.center-box {
  text-align: center;
  margin: 40px 0;
}

/* 휴대폰 프레임 */
.phone-frame {
  position: relative;
  width: 220px;
  margin: 0 auto;
  padding: 12px;
  background: linear-gradient(145deg, #2c2c2e 0%, #1c1c1e 100%);
  border-radius: 28px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
}

.phone-frame::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 8px;
  background: #1c1c1e;
  border-radius: 4px;
}

.phone-frame img {
  display: block;
  width: 100%;
  border-radius: 16px;
}

/* 히어로 배경 그라데이션 */
.hero-gradient {
  background: linear-gradient(180deg,
    #E8F4F4 0%,
    #F4F6F8 50%,
    #FEF7F5 100%
  );
}

/* 스피너 (로딩) */
.spinner {
  width: 40px;
  height: 40px;
  margin: 24px auto;
  border: 4px solid var(--color-primary-light);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}