/* ===== Design Tokens ===== */
:root {
  --color-primary: #FFBB00;
  --color-primary-light: #FFF0BF;
  --color-bg: #FFFFFF;
  --color-surface: #FFF8E7;
  --color-text-primary: #191F28;
  --color-text-secondary: #515E70;
  --color-text-muted: #92A3B2;

  --font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-bold: 700;
  --font-semibold: 600;
  --font-medium: 500;
  --font-regular: 400;

  --max-width: 960px;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-regular);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-surface);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

/* ===== Hero ===== */
.hero {
  position: relative;
  background-color: var(--color-primary);
  text-align: center;
  padding: 80px 20px 120px;
  overflow: hidden;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* Decorative circles */
.hero__deco {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.hero__deco--1 {
  width: 140px;
  height: 140px;
  background-color: var(--color-text-primary);
  opacity: 0.07;
  top: 5%;
  left: -40px;
}

.hero__deco--2 {
  width: 50px;
  height: 50px;
  background-color: var(--color-text-primary);
  opacity: 0.06;
  top: 8%;
  right: 6%;
}

.hero__deco--3 {
  width: 160px;
  height: 160px;
  background-color: var(--color-text-primary);
  opacity: 0.07;
  bottom: 22%;
  left: 8%;
}

.hero__deco--4 {
  width: 60px;
  height: 60px;
  background-color: var(--color-text-primary);
  opacity: 0.05;
  bottom: 18%;
  right: -10px;
}

@media (min-width: 768px) {
  .hero__deco--1 {
    width: 220px;
    height: 220px;
    top: 6%;
    left: 4%;
  }

  .hero__deco--2 {
    width: 70px;
    height: 70px;
    top: 10%;
    right: 10%;
  }

  .hero__deco--3 {
    width: 200px;
    height: 200px;
    bottom: 20%;
    left: 14%;
  }

  .hero__deco--4 {
    width: 80px;
    height: 80px;
    bottom: 22%;
    right: 5%;
  }
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
}

.hero__brand {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 2.5rem;
}

.hero__logo {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  background-color: var(--color-bg);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

@media (min-width: 768px) {
  .hero__logo {
    width: 96px;
    height: 96px;
    border-radius: 24px;
  }

  .hero__brand {
    gap: 20px;
  }
}

.hero__wordmark {
  font-size: 2.75rem;
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .hero__wordmark {
    font-size: 3.5rem;
  }
}

.hero__title {
  font-size: 2.25rem;
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  line-height: 1.35;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

@media (min-width: 768px) {
  .hero__title {
    font-size: 3.25rem;
  }
}

.hero__sub {
  font-size: 0.9375rem;
  color: var(--color-text-primary);
  opacity: 0.45;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.hero__sub::before,
.hero__sub::after {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--color-text-primary);
  opacity: 0.35;
}

@media (min-width: 768px) {
  .hero__sub {
    font-size: 1rem;
  }
}

/* Chevron down */
.hero__chevron {
  position: relative;
  z-index: 1;
  margin-top: 3.5rem;
  animation: bounce 2.4s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  40% { transform: translateY(8px); }
  60% { transform: translateY(-2px); }
  80% { transform: translateY(4px); }
}

/* V-shape cutout — full-width diagonal */
.hero__cutout {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1;
}

.hero__cutout svg {
  display: block;
  width: 100%;
  height: auto;
}

/* ===== About ===== */
.about {
  background-color: var(--color-surface);
  text-align: center;
  padding: 56px 20px 40px;
}

@media (min-width: 768px) {
  .about {
    padding: 80px 20px 56px;
  }
}

.about__icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  border-radius: 14px;
}

.about__text {
  font-size: 1.375rem;
  font-weight: var(--font-semibold);
  line-height: 1.5;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .about__text {
    font-size: 1.625rem;
  }
}

/* ===== Features ===== */
.features {
  background-color: var(--color-surface);
  padding-bottom: 24px;
}

.features .container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 20px;
}

@media (min-width: 768px) {
  .features .container {
    padding: 56px 20px;
  }
}

.features__heading {
  font-size: 1.25rem;
  font-weight: var(--font-semibold);
  text-align: center;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.features__dots {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-bottom: 2rem;
}

.features__dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

.features__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 768px) {
  .features__grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
}

.feature-card {
  background-color: var(--color-bg);
  border-radius: 20px;
  padding: 1.75rem;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.feature-card:hover {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.feature-card__icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  border-radius: 12px;
  margin-bottom: 1rem;
}

.feature-card__title {
  font-size: 1.0625rem;
  font-weight: var(--font-semibold);
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.feature-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ===== CTA ===== */
.cta {
  background-color: var(--color-surface);
}

.cta .container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px 56px;
}

@media (min-width: 768px) {
  .cta .container {
    padding: 0 20px 80px;
  }
}

.cta__card {
  background-color: var(--color-primary);
  border-radius: 24px;
  padding: 48px 24px;
  text-align: center;
}

@media (min-width: 768px) {
  .cta__card {
    border-radius: 28px;
    padding: 64px 40px;
  }
}

.cta__title {
  font-size: 1.5rem;
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .cta__title {
    font-size: 1.75rem;
  }
}

.cta__desc {
  font-size: 0.9375rem;
  color: var(--color-text-primary);
  opacity: 0.65;
  margin-bottom: 2rem;
}

.cta__button {
  display: inline-block;
  background-color: var(--color-text-primary);
  color: var(--color-bg);
  font-size: 0.9375rem;
  font-weight: var(--font-semibold);
  padding: 14px 36px;
  border-radius: 100px;
  transition: opacity var(--transition-base);
}

.cta__button:hover {
  opacity: 0.85;
}

/* ===== Footer ===== */
.footer {
  background-color: var(--color-bg);
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

@media (min-width: 768px) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 20px 20px;
  }
}

.footer__left {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

@media (min-width: 768px) {
  .footer__left {
    flex-direction: row;
    gap: 16px;
    align-items: center;
  }
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer__logo {
  width: 24px;
  height: 24px;
  border-radius: 6px;
}

.footer__name {
  font-size: 0.9375rem;
  font-weight: var(--font-semibold);
}

.footer__copyright {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.footer__links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.footer__links a {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  transition: color var(--transition-base);
}

.footer__links a:hover {
  color: var(--color-text-primary);
}

.footer__divider {
  color: var(--color-text-muted);
  margin: 0 0.5rem;
  font-size: 0.75rem;
}

/* ===== Scroll Animation ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }