/* Global Styles */
:root {
  color-scheme: light;
  --color-background: #f4f6fb;
  --color-surface: #ffffff;
  --color-primary: #3a56d9;
  --color-primary-dark: #2b42ab;
  --color-accent: #ffab40;
  --color-text: #1f2544;
  --color-text-muted: #596080;
  --shadow-soft: 0 12px 24px rgba(35, 56, 154, 0.14);
  --radius-large: 24px;
  --radius-medium: 16px;
  --radius-small: 10px;
  --max-width: 1120px;
  --transition-base: all 0.2s ease;
  font-size: 62.5%;
}

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

body {
  margin: 0;
  font-family: "Pretendard Variable", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, rgba(244, 246, 251, 1) 0%, rgba(255, 255, 255, 1) 80%);
  color: var(--color-text);
  font-size: 1.6rem;
  line-height: 1.6;
}

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

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-medium);
}

button {
  font: inherit;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page__header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(58, 86, 217, 0.08);
}

.header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 2.4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-primary);
}

.logo__badge {
  width: 3.8rem;
  height: 3.8rem;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary) 10%, var(--color-accent) 90%);
  display: grid;
  place-items: center;
  color: var(--color-surface);
  font-weight: 800;
  font-size: 1.8rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.nav a:hover,
.nav a:focus {
  color: var(--color-primary);
}

.hero {
  max-width: var(--max-width);
  margin: 4.8rem auto 2.4rem;
  padding: 0 2.4rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 4rem;
  align-items: center;
}

.hero__content h1 {
  font-size: clamp(3.6rem, 4vw, 4.6rem);
  line-height: 1.2;
  margin-bottom: 1.6rem;
}

.hero__content p {
  color: var(--color-text-muted);
  font-size: 1.8rem;
  margin-bottom: 2.4rem;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  background: var(--color-primary);
  color: #fff;
  padding: 1.4rem 2.6rem;
  border-radius: 999px;
  box-shadow: var(--shadow-soft);
  transition: var(--transition-base);
}

.hero__cta:hover,
.hero__cta:focus {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
}

.hero__visual {
  position: relative;
  display: grid;
  gap: 1.6rem;
}

.hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(58, 86, 217, 0.16), rgba(255, 171, 64, 0.1));
  filter: blur(50px);
  z-index: -1;
  border-radius: 36px;
}

.hero__visual img {
  border-radius: 32px;
  box-shadow: var(--shadow-soft);
}

.section {
  padding: 2.4rem;
}

.section__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section__title {
  font-size: 2.4rem;
  margin-bottom: 1.6rem;
}

.app-grid {
  display: grid;
  gap: 2.4rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.app-card {
  background: var(--color-surface);
  border-radius: var(--radius-large);
  padding: 2.4rem;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  transition: var(--transition-base);
}

.app-card:hover,
.app-card:focus-within {
  transform: translateY(-6px);
  box-shadow: 0 18px 38px rgba(35, 56, 154, 0.18);
}

.app-card__header {
  display: flex;
  gap: 1.6rem;
  align-items: center;
}

.app-card__icon {
  width: 64px;
  height: 64px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(58, 86, 217, 0.2), rgba(255, 171, 64, 0.2));
  display: grid;
  place-items: center;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-primary);
  overflow: hidden;
}

.app-card__icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
}

.app-card__title {
  font-size: 2rem;
  font-weight: 700;
  margin: 0;
}

.app-card__meta {
  display: flex;
  gap: 1rem;
  color: var(--color-text-muted);
  font-size: 1.4rem;
}

.app-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 1.2rem;
  background: rgba(58, 86, 217, 0.08);
  color: var(--color-primary);
  font-size: 1.2rem;
  border-radius: 999px;
  font-weight: 600;
}

.app-card__description {
  color: var(--color-text-muted);
  flex: 1;
}

.app-card__link {
  align-self: flex-start;
  padding: 1rem 2rem;
  border-radius: 999px;
  background: rgba(58, 86, 217, 0.12);
  color: var(--color-primary);
  font-weight: 600;
  transition: var(--transition-base);
}

.app-card__link:hover,
.app-card__link:focus {
  background: var(--color-primary);
  color: var(--color-surface);
}

.app-card--disabled {
  opacity: 0.6;
  pointer-events: none;
  position: relative;
}

.app-card__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 1.4rem;
  border-radius: 999px;
  background: rgba(31, 37, 68, 0.08);
  color: var(--color-text-muted);
  font-weight: 600;
}

.footer {
  margin-top: auto;
  background: #0f152d;
  color: rgba(255, 255, 255, 0.84);
  padding: 3.2rem 2.4rem;
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.footer__logo {
  font-weight: 700;
  font-size: 2rem;
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--color-accent);
}

.footer__meta {
  grid-column: 1 / -1;
  font-size: 1.3rem;
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
  padding-top: 1.6rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: 1.6rem;
}

/* Detail page */
.detail-hero {
  max-width: var(--max-width);
  margin: 4rem auto;
  padding: 0 2.4rem;
  display: grid;
  gap: 3.2rem;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  align-items: center;
}

.detail-hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 1.4rem;
  border-radius: 999px;
  background: rgba(58, 86, 217, 0.1);
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 1.6rem;
}

.detail-hero__title {
  font-size: clamp(3.2rem, 4vw, 4.4rem);
  margin-bottom: 1.6rem;
}

.detail-hero__subtitle {
  color: var(--color-text-muted);
  font-size: 1.8rem;
  margin-bottom: 2.4rem;
}

.detail-hero__icon {
  width: 96px;
  height: 96px;
  border-radius: 24px;
  box-shadow: var(--shadow-soft);
  margin-bottom: 1.6rem;
  background: #fff;
  padding: 1rem;
  object-fit: contain;
}

.detail-hero__stats {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 2.4rem;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.stat__label {
  color: var(--color-text-muted);
  font-size: 1.3rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.stat__value {
  font-size: 2rem;
  font-weight: 700;
}

.download-actions {
  display: inline-flex;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.download-button {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1.2rem 2.4rem;
  border-radius: 999px;
  border: none;
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-base);
  box-shadow: var(--shadow-soft);
}

.download-button:hover,
.download-button:focus {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
}

.download-button--secondary {
  background: rgba(58, 86, 217, 0.12);
  color: var(--color-primary);
  box-shadow: none;
}

.download-button--secondary:hover,
.download-button--secondary:focus {
  background: rgba(58, 86, 217, 0.2);
}

.feature-section {
  background: var(--color-surface);
  margin: 0 auto;
  padding: 3.2rem 2.4rem;
}

.feature-section__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3.2rem;
}

.feature {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.feature__title {
  font-size: 1.8rem;
  font-weight: 700;
}

.feature__desc {
  color: var(--color-text-muted);
}

.gallery {
  max-width: var(--max-width);
  margin: 4rem auto 2rem;
  padding: 0 2.4rem;
}

.gallery__title {
  font-size: 2.4rem;
  margin-bottom: 1.6rem;
}

.gallery__grid {
  display: grid;
  gap: 1.6rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.info-section {
  max-width: var(--max-width);
  margin: 0 auto 6rem;
  padding: 0 2.4rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 3.2rem;
}

.info-card {
  background: var(--color-surface);
  border-radius: var(--radius-large);
  padding: 2.4rem;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.info-card--highlight {
  border: 1px solid rgba(58, 86, 217, 0.18);
}

.info-card__title {
  font-size: 1.8rem;
  font-weight: 700;
}

.info-card__desc {
  color: var(--color-text-muted);
}

.info-card__list {
  margin: 0;
  padding-left: 1.6rem;
  display: grid;
  gap: 0.6rem;
  color: var(--color-text);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 1.2rem;
  background: rgba(58, 86, 217, 0.1);
  border-radius: 999px;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-primary);
}

@media (max-width: 640px) {
  .header__inner {
    flex-direction: column;
    gap: 1.2rem;
    text-align: center;
  }

  .nav {
    justify-content: center;
    flex-wrap: wrap;
  }

  .hero {
    margin-top: 3.2rem;
  }

  .hero__cta {
    width: 100%;
    justify-content: center;
  }

  .download-actions {
    width: 100%;
  }

  .download-button {
    flex: 1 1 auto;
    justify-content: center;
  }
}