/* ==========================================================================
   ShelfCheck Landing Page — style.css
   Color palette: blush pink, cream/ivory, dusty rose, charcoal
   Typography: DM Sans (Google Fonts)
   Mobile-first responsive design
   ========================================================================== */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors */
  --color-bg:        #FBF7F4;
  --color-bg-alt:    #FFF8F5;
  --color-surface:   #FFFFFF;
  --color-blush:     #F5D6CC;
  --color-rose:      #D4A09A;
  --color-mauve:     #B8868F;
  --color-accent:    #C97B84;
  --color-charcoal:  #3B3236;
  --color-text:      #3B3236;
  --color-text-soft: #6E5F64;
  --color-text-muted:#9A8B90;
  --color-border:    #F0E4DF;
  --color-white:     #FFFFFF;

  /* Gradients */
  --gradient-hero:   linear-gradient(135deg, #FBF7F4 0%, #FFF0EB 50%, #FBF7F4 100%);
  --gradient-card:   linear-gradient(160deg, #FFFFFF 0%, #FFF8F5 100%);
  --gradient-btn:    linear-gradient(135deg, #C97B84 0%, #B8868F 100%);
  --gradient-btn-hover: linear-gradient(135deg, #B8868F 0%, #A87580 100%);
  --gradient-blob-1: radial-gradient(circle, rgba(245,214,204,0.5) 0%, transparent 70%);
  --gradient-blob-2: radial-gradient(circle, rgba(200,123,132,0.2) 0%, transparent 70%);

  /* Typography */
  --font-family:     'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --fs-xs:           0.75rem;   /* 12px */
  --fs-sm:           0.875rem;  /* 14px */
  --fs-base:         1rem;      /* 16px */
  --fs-md:           1.125rem;  /* 18px */
  --fs-lg:           1.25rem;   /* 20px */
  --fs-xl:           1.5rem;    /* 24px */
  --fs-2xl:          2rem;      /* 32px */
  --fs-3xl:          2.5rem;    /* 40px */
  --fs-4xl:          3rem;      /* 48px */

  /* Spacing */
  --space-xs:   0.5rem;
  --space-sm:   0.75rem;
  --space-md:   1rem;
  --space-lg:   1.5rem;
  --space-xl:   2rem;
  --space-2xl:  3rem;
  --space-3xl:  4rem;
  --space-4xl:  6rem;

  /* Layout */
  --container-max:   1120px;
  --nav-height:      64px;
  --border-radius:   12px;
  --border-radius-lg:20px;
  --border-radius-full: 9999px;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   300ms ease;
  --transition-slow:   500ms ease;
}


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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

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

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

ul, ol {
  list-style: none;
}

button, input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}


/* ---------- Utility ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* Fade-in animation classes (applied by Intersection Observer) */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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


/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(251, 247, 244, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), background var(--transition-base);
}

.nav.is-scrolled {
  border-bottom-color: var(--color-border);
  background: rgba(251, 247, 244, 0.95);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Logo / Wordmark */
.nav__logo {
  font-size: var(--fs-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-charcoal);
}

.nav__logo span {
  color: var(--color-accent);
}

/* Desktop nav links */
.nav__links {
  display: none;
  gap: var(--space-xl);
}

.nav__links a {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text-soft);
  transition: color var(--transition-fast);
}

.nav__links a:hover {
  color: var(--color-accent);
}

/* Hamburger button */
.nav__hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-charcoal);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav__hamburger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger.is-open span:nth-child(2) {
  opacity: 0;
}

.nav__hamburger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile full-screen slide-in menu — lives outside <nav> to avoid
   backdrop-filter creating a containing block that traps fixed children */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  background: linear-gradient(135deg, #FBF7F4 0%, #FFF0EB 50%, #F5D6CC 100%); /* blush gradient matching hero */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xl);
  transform: translateX(100%);
  visibility: hidden;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
              visibility 0s linear 0.4s;
}

.mobile-menu.is-open {
  transform: translateX(0);
  visibility: visible;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
              visibility 0s linear 0s;
}

/* Close (X) button — top right of overlay */
.mobile-menu__close {
  position: absolute;
  top: 18px;
  right: var(--space-lg);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  cursor: pointer;
}

.mobile-menu__close span {
  position: absolute;
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-charcoal);
  border-radius: 2px;
}

.mobile-menu__close span:first-child {
  transform: rotate(45deg);
}

.mobile-menu__close span:last-child {
  transform: rotate(-45deg);
}

.mobile-menu a {
  font-size: var(--fs-2xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
  transition: color var(--transition-fast);
}

.mobile-menu a:hover {
  color: var(--color-accent);
}


/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  position: relative;
  min-height: calc(100svh - var(--nav-height));
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  padding-top: calc(var(--nav-height) + var(--space-xl));
  background: var(--gradient-hero);
  overflow: hidden;
}

/* Decorative gradient blobs */
.hero__blob {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.hero__blob--1 {
  width: 340px;
  height: 340px;
  top: -60px;
  right: -80px;
  background: var(--gradient-blob-1);
}

.hero__blob--2 {
  width: 260px;
  height: 260px;
  bottom: 40px;
  left: -90px;
  background: var(--gradient-blob-2);
}

.hero__blob--3 {
  width: 180px;
  height: 180px;
  bottom: -40px;
  right: 20%;
  background: radial-gradient(circle, rgba(184,134,143,0.15) 0%, transparent 70%);
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 600px;
}

.hero__title {
  font-size: var(--fs-2xl);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-charcoal);
  margin-bottom: var(--space-md);
}

.hero__subtitle {
  font-size: var(--fs-base);
  line-height: 1.65;
  color: var(--color-text-soft);
  margin-bottom: var(--space-xl);
}

.hero__cta-hint {
  display: block;
  margin-top: var(--space-sm);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}


/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-weight: 600;
  font-size: var(--fs-base);
  border-radius: var(--border-radius-full);
  transition: transform var(--transition-fast), box-shadow var(--transition-base), background var(--transition-base);
}

.btn--primary {
  background: var(--gradient-btn);
  color: var(--color-white);
  box-shadow: 0 4px 20px rgba(201,123,132,0.3);
}

.btn--primary:hover {
  background: var(--gradient-btn-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 28px rgba(201,123,132,0.4);
}

.btn--primary:active {
  transform: translateY(0);
}


/* ==========================================================================
   PAIN POINTS SECTION
   ========================================================================== */
.pain-points {
  padding: var(--space-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-header__title {
  font-size: var(--fs-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-charcoal);
}

.pain-points__grid {
  display: grid;
  gap: var(--space-md);
  max-width: 560px;
  margin: 0 auto;
}

.pain-card {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--space-lg) var(--space-xl);
  font-size: var(--fs-base);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.5;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Subtle left accent bar */
.pain-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 3px;
  border-radius: 3px;
  background: var(--gradient-btn);
  opacity: 0.6;
}

.pain-card__emoji {
  display: block;
  font-size: var(--fs-xl);
  margin-bottom: var(--space-xs);
}


/* ==========================================================================
   FEATURES SECTION
   ========================================================================== */
.features {
  padding: var(--space-3xl) 0;
  background: var(--color-bg-alt);
  position: relative;
}

/* Decorative shape */
.features__blob {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  pointer-events: none;
  top: -100px;
  left: -80px;
  background: radial-gradient(circle, rgba(245,214,204,0.35) 0%, transparent 70%);
}

.features__grid {
  display: grid;
  gap: var(--space-lg);
  max-width: 560px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  text-align: center;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(59,50,54,0.06);
}

.feature-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-md);
  border-radius: 16px;
  background: linear-gradient(135deg, #FFF0EB 0%, #FDDFD6 100%);
  font-size: 1.5rem;
}

.feature-card__title {
  font-size: var(--fs-md);
  font-weight: 700;
  color: var(--color-charcoal);
  margin-bottom: var(--space-xs);
}

.feature-card__desc {
  font-size: var(--fs-sm);
  color: var(--color-text-soft);
  line-height: 1.6;
}


/* ==========================================================================
   COMMUNITY SECTION
   ========================================================================== */
.community {
  padding: var(--space-3xl) 0;
  text-align: center;
}

.community__text {
  max-width: 600px;
  margin: 0 auto;
  font-size: var(--fs-base);
  line-height: 1.75;
  color: var(--color-text-soft);
}


/* ==========================================================================
   SIGNUP / WAITLIST SECTION
   ========================================================================== */
.signup {
  padding: var(--space-3xl) 0 var(--space-4xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.signup__blob {
  position: absolute;
  width: 350px;
  height: 350px;
  border-radius: 50%;
  pointer-events: none;
  bottom: -120px;
  right: -100px;
  background: var(--gradient-blob-1);
}

.signup__content {
  position: relative;
  z-index: 1;
  max-width: 520px;
  margin: 0 auto;
}

.signup__subtitle {
  font-size: var(--fs-base);
  color: var(--color-text-soft);
  margin-bottom: var(--space-xl);
  line-height: 1.65;
}

/* Email form */
.signup__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.signup__input {
  width: 100%;
  padding: 14px 20px;
  border-radius: var(--border-radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: var(--fs-base);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.signup__input:focus {
  border-color: var(--color-rose);
  box-shadow: 0 0 0 3px rgba(212,160,154,0.2);
}

.signup__disclaimer {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 380px;
  margin: 0 auto;
}


/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.footer__links {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
  justify-content: center;
}

.footer__links a {
  font-size: var(--fs-sm);
  color: var(--color-text-soft);
  transition: color var(--transition-fast);
}

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

.footer__social {
  display: flex;
  gap: var(--space-md);
}

.footer__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text-soft);
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.footer__social a:hover {
  background: var(--color-blush);
  color: var(--color-charcoal);
  border-color: var(--color-blush);
}

.footer__social svg {
  width: 18px;
  height: 18px;
}

.footer__copy {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}


/* ==========================================================================
   SECONDARY PAGES (features, about, privacy, contact)
   ========================================================================== */
.page-content {
  min-height: calc(100vh - var(--nav-height) - 120px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-height) + var(--space-3xl)) var(--space-lg) var(--space-3xl);
}

.page-content__inner {
  max-width: 560px;
}

.page-content__title {
  font-size: var(--fs-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-charcoal);
  margin-bottom: var(--space-lg);
}

.page-content__text {
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--color-text-soft);
  margin-bottom: var(--space-lg);
}

.page-content__text a {
  color: var(--color-accent);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: rgba(201,123,132,0.3);
  text-underline-offset: 2px;
  transition: text-decoration-color var(--transition-fast);
}

.page-content__text a:hover {
  text-decoration-color: var(--color-accent);
}

/* Contact email styling */
.contact-email {
  display: inline-block;
  padding: 12px 28px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-full);
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
  transition: background var(--transition-fast);
}

.contact-email:hover {
  background: var(--color-blush);
}


/* ==========================================================================
   PRIVACY PAGE
   ========================================================================== */

/* Trust blurb — hero-like section, fits above the fold on mobile */
.privacy-hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: calc(100svh - var(--nav-height));
  padding: var(--space-xl) var(--space-lg);
  padding-top: calc(var(--nav-height) + var(--space-xl));
  background: var(--gradient-hero);
  overflow: hidden;
}

.privacy-hero__blob {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.privacy-hero__blob--1 {
  width: 300px;
  height: 300px;
  top: -50px;
  right: -70px;
  background: var(--gradient-blob-1);
}

.privacy-hero__blob--2 {
  width: 220px;
  height: 220px;
  bottom: 30px;
  left: -80px;
  background: var(--gradient-blob-2);
}

.privacy-hero__content {
  position: relative;
  z-index: 1;
  max-width: 580px;
}

.privacy-hero__title {
  font-size: var(--fs-2xl);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-charcoal);
  margin-bottom: var(--space-md);
}

.privacy-hero__text {
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--color-text-soft);
}

/* Privacy cards section */
.privacy-cards {
  padding: var(--space-3xl) 0;
}

.privacy-cards__grid {
  display: grid;
  gap: var(--space-lg);
  max-width: 560px;
  margin: 0 auto;
}

/* Individual privacy card — mirrors feature-card style */
.privacy-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  text-align: center;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.privacy-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(59,50,54,0.06);
}

.privacy-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-md);
  border-radius: 16px;
  background: linear-gradient(135deg, #FFF0EB 0%, #FDDFD6 100%);
  font-size: 1.5rem;
}

.privacy-card__title {
  font-size: var(--fs-md);
  font-weight: 700;
  color: var(--color-charcoal);
  margin-bottom: var(--space-xs);
}

.privacy-card__desc {
  font-size: var(--fs-sm);
  color: var(--color-text-soft);
  line-height: 1.65;
}

/* Legal fine print */
.privacy-legal {
  padding: 0 0 var(--space-3xl);
  text-align: center;
}

.privacy-legal__text {
  max-width: 560px;
  margin: 0 auto;
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--color-text-muted);
}

.privacy-legal__text a {
  color: var(--color-accent);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: rgba(201,123,132,0.3);
  text-underline-offset: 2px;
  transition: text-decoration-color var(--transition-fast);
}

.privacy-legal__text a:hover {
  text-decoration-color: var(--color-accent);
}


/* ==========================================================================
   RESPONSIVE — Tablet & Desktop
   ========================================================================== */

/* Tablet (640px+) */
@media (min-width: 640px) {
  .hero__title {
    font-size: var(--fs-3xl);
  }

  .hero__subtitle {
    font-size: var(--fs-md);
  }

  .section-header__title {
    font-size: var(--fs-2xl);
  }

  .pain-points__grid {
    grid-template-columns: 1fr 1fr;
    max-width: 700px;
  }

  .features__grid {
    grid-template-columns: 1fr 1fr;
    max-width: 700px;
  }

  .privacy-hero__title {
    font-size: var(--fs-3xl);
  }

  .privacy-hero__text {
    font-size: var(--fs-md);
  }

  .privacy-cards__grid {
    grid-template-columns: 1fr 1fr;
    max-width: 700px;
  }

  .signup__form {
    flex-direction: row;
  }

  .signup__form .btn {
    white-space: nowrap;
    flex-shrink: 0;
  }
}

/* Desktop (960px+) */
@media (min-width: 960px) {
  .nav__links {
    display: flex;
  }

  .nav__hamburger {
    display: none;
  }

  .hero__title {
    font-size: var(--fs-4xl);
  }

  .hero__subtitle {
    font-size: var(--fs-lg);
  }

  .pain-points {
    padding: var(--space-4xl) 0;
  }

  .features {
    padding: var(--space-4xl) 0;
  }

  .community {
    padding: var(--space-4xl) 0;
  }

  .signup {
    padding: var(--space-4xl) 0 var(--space-4xl);
  }

  .privacy-hero__title {
    font-size: var(--fs-4xl);
  }

  .privacy-hero__text {
    font-size: var(--fs-lg);
  }

  .privacy-cards {
    padding: var(--space-4xl) 0;
  }

  .page-content__title {
    font-size: var(--fs-3xl);
  }

  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
  }

  .footer__copy {
    order: -1;
  }
}