/* ============================================
   Sukoon — Design System & Layout
   ============================================ */

:root {
  --color-peach: #FF9A8B;
  --color-pink: #FF3D77;
  --color-magenta: #D81B60;
  --color-charcoal: #4A4A4A;
  --color-dark: #2D2D2D;
  --color-white: #FFFFFF;
  --color-warm-white: #FFFBF9;
  --color-blush: #FFF5F2;
  --color-muted: #8A8A8A;
  --color-border: #F0E4E0;

  --gradient-brand: linear-gradient(135deg, var(--color-peach) 0%, var(--color-pink) 50%, var(--color-magenta) 100%);
  --gradient-soft: linear-gradient(180deg, var(--color-warm-white) 0%, var(--color-blush) 100%);

  --font-serif: "Cormorant Garamond", Georgia, serif;
  --font-sans: "Inter", system-ui, -apple-system, sans-serif;

  --container-max: 1100px;
  --section-padding: clamp(4rem, 8vw, 7.5rem);
  --radius: 16px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 8px rgba(216, 27, 96, 0.06);
  --shadow-md: 0 8px 32px rgba(216, 27, 96, 0.1);
  --shadow-lg: 0 16px 48px rgba(216, 27, 96, 0.12);
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-charcoal);
  background: var(--color-warm-white);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-pink);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-magenta);
}

ul {
  list-style: none;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 1000;
  padding: 0.75rem 1.25rem;
  background: var(--color-magenta);
  color: var(--color-white);
  border-radius: var(--radius-pill);
  font-weight: 600;
}

.skip-link:focus {
  top: 1rem;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--color-dark);
  line-height: 1.25;
  font-weight: 600;
}

h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(1.875rem, 4vw, 2.75rem);
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

.section-label {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-pink);
  margin-bottom: 0.75rem;
}

.section-intro {
  max-width: 640px;
  margin-top: 1rem;
  font-size: 1.0625rem;
  color: var(--color-charcoal);
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: var(--section-padding) 0;
}

section:nth-child(even) {
  background: var(--color-blush);
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-header .section-intro {
  margin-left: auto;
  margin-right: auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
  text-decoration: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-magenta);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--gradient-brand);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--color-white);
}

.btn-outline {
  background: transparent;
  color: var(--color-pink);
  border: 2px solid var(--color-pink);
}

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

.btn-nav {
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
}

/* Utility */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Navigation */
.header {
  z-index: 100;
  width: 100%;
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.header--hero {
  position: absolute;
  top: 0;
  left: 0;
  background: transparent;
  border-bottom: none;
}

.header--hero.header--scrolled {
  position: fixed;
  top: 0;
  left: 0;
  background: rgba(255, 251, 249, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header--page {
  position: sticky;
  top: 0;
  background: rgba(255, 251, 249, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 4.5rem;
  gap: 1rem;
}

.nav-logo {
  justify-self: start;
  grid-column: 1;
  grid-row: 1;
}

.nav-logo img {
  height: 2.75rem;
  width: auto;
  max-width: 10.5rem;
  display: block;
  object-fit: contain;
  transition: filter var(--transition);
}

.header--hero:not(.header--scrolled) .nav-logo img {
  filter: none;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.75rem;
  justify-self: center;
  grid-column: 2;
  grid-row: 1;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-charcoal);
  transition: color var(--transition), opacity var(--transition);
}

.header--hero:not(.header--scrolled) .nav-links a {
  color: var(--color-charcoal);
}

.header--hero:not(.header--scrolled) .nav-links a:hover {
  color: var(--color-pink);
}

.nav-links a:hover {
  color: var(--color-pink);
}

.nav-social {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  grid-column: 3;
  grid-row: 1;
}

.nav-social .btn {
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0.5rem;
  background: none;
  border: none;
  cursor: pointer;
  justify-self: end;
  grid-column: 3;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
}

.header--hero:not(.header--scrolled) .nav-toggle span {
  background: var(--color-dark);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 0;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url("../assets/hero-bg.jpg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.92) 0%,
    rgba(255, 255, 255, 0.55) 35%,
    rgba(255, 154, 188, 0.45) 65%,
    rgba(255, 61, 119, 0.72) 100%
  );
}

.hero-inner {
  position: relative;
  z-index: 2;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  max-width: 720px;
  padding: 6rem 1.5rem 4rem;
}

.hero-social-proof {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.875rem;
  margin-bottom: 1.75rem;
}

.hero-avatars {
  display: flex;
  align-items: center;
}

.hero-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.9);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-white);
  margin-left: -0.5rem;
}

.hero-avatar:first-child {
  margin-left: 0;
}

.hero-avatar--1 {
  background: linear-gradient(135deg, #FF9A8B, #FF3D77);
}

.hero-avatar--2 {
  background: linear-gradient(135deg, #FF3D77, #D81B60);
}

.hero-avatar--3 {
  background: linear-gradient(135deg, #D81B60, #FF9A8B);
}

.hero-social-text {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-charcoal);
}

.hero-inner h1 {
  color: var(--color-dark);
  margin-bottom: 1.25rem;
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  letter-spacing: -0.01em;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.125rem);
  line-height: 1.75;
  margin-bottom: 2rem;
  color: var(--color-charcoal);
  max-width: 600px;
}

.hero-cta {
  display: flex;
  align-items: center;
  width: 100%;
  max-width: 480px;
  padding: 0.375rem 0.375rem 0.375rem 1.5rem;
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 61, 119, 0.25);
  border-radius: var(--radius-pill);
  gap: 0.5rem;
  box-shadow: var(--shadow-sm);
}

.hero-cta input[type="email"] {
  flex: 1;
  min-width: 0;
  padding: 0.75rem 0;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--color-dark);
}

.hero-cta input[type="email"]::placeholder {
  color: var(--color-muted);
}

.hero-cta input[type="email"]:focus {
  outline: none;
}

.hero-cta-btn {
  flex-shrink: 0;
  padding: 0.75rem 1.5rem;
  background: var(--gradient-brand);
  border: none;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-white);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

.hero-cta-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(216, 27, 96, 0.35);
}

.hero-cta-btn:focus-visible {
  outline: 2px solid var(--color-pink);
  outline-offset: 2px;
}

/* Scroll Animations */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Responsive */
@media (max-width: 1023px) {
  .nav-links {
    gap: 1rem;
  }

  .nav-links a {
    font-size: 0.8125rem;
  }
}

@media (max-width: 767px) {
  .nav {
    grid-template-columns: 1fr auto;
  }

  .nav-logo img {
    height: 2.25rem;
    max-width: 8rem;
  }

  .nav-toggle {
    display: flex;
    grid-column: 3;
    grid-row: 1;
  }

  .nav-social {
    display: none;
  }

  .nav-links {
    position: fixed;
    top: 4.5rem;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    justify-self: stretch;
    grid-column: 1 / -1;
    background: var(--color-warm-white);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.5rem 1.5rem;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  }

  .header--hero:not(.header--scrolled) .nav-links {
    background: rgba(45, 45, 45, 0.88);
    backdrop-filter: blur(16px);
    border-bottom-color: rgba(255, 255, 255, 0.1);
  }

  .nav-links.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links a {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
  }

  .header--hero:not(.header--scrolled) .nav-links a {
    color: rgba(255, 255, 255, 0.92);
    border-bottom-color: rgba(255, 255, 255, 0.12);
  }

  .header--hero:not(.header--scrolled) .nav-links a:hover {
    color: var(--color-white);
  }

  .hero-inner {
    padding: 5.5rem 1.5rem 3rem;
  }

  .hero-social-proof {
    flex-direction: column;
    gap: 0.625rem;
  }

  .hero-cta {
    flex-direction: column;
    padding: 0.75rem;
    border-radius: var(--radius);
    max-width: 100%;
  }

  .hero-cta input[type="email"] {
    width: 100%;
    padding: 0.75rem 1rem;
    text-align: center;
    border-bottom: 1px solid rgba(255, 61, 119, 0.2);
  }

  .hero-cta-btn {
    width: 100%;
    padding: 0.875rem 1.5rem;
  }
}