/* ============================================
   GrubFlip Landing Page
   Mobile-first · Brand tokens from Ava
   ============================================ */

/* --- Tokens (from design system) --- */
:root {
  --gf-primary: #FF6B35;
  --gf-primary-light: #FF8F66;
  --gf-primary-dark: #D94E1F;
  --gf-primary-bg: #FFF3ED;

  --gf-secondary: #2D6A4F;
  --gf-secondary-light: #40916C;
  --gf-secondary-dark: #1B4332;
  --gf-secondary-bg: #EDF5F0;

  --gf-accent: #FFBA08;
  --gf-accent-light: #FFD166;
  --gf-accent-bg: #FFF8E1;

  --gf-neutral-50: #FAFAFA;
  --gf-neutral-100: #F5F5F5;
  --gf-neutral-200: #E5E5E5;
  --gf-neutral-400: #A3A3A3;
  --gf-neutral-500: #737373;
  --gf-neutral-600: #525252;
  --gf-neutral-700: #404040;
  --gf-neutral-800: #262626;
  --gf-neutral-900: #171717;

  --gf-font-heading: 'Plus Jakarta Sans', sans-serif;
  --gf-font-body: 'Inter', sans-serif;

  --gf-shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --gf-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --gf-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --gf-shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);

  --gf-radius-sm: 0.375rem;
  --gf-radius-md: 0.5rem;
  --gf-radius-lg: 0.75rem;
  --gf-radius-xl: 1rem;
  --gf-radius-2xl: 1.5rem;
  --gf-radius-full: 9999px;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--gf-font-body);
  color: var(--gf-neutral-800);
  background: #fff;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--gf-font-body);
  font-weight: 600;
  border: none;
  border-radius: var(--gf-radius-full);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  line-height: 1;
  white-space: nowrap;
}

.btn--sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn--lg {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

.btn--primary {
  background: var(--gf-primary);
  color: #fff;
}
.btn--primary:hover {
  background: var(--gf-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--gf-shadow-md);
}

.btn--outline {
  background: transparent;
  color: var(--gf-neutral-700);
  border: 2px solid var(--gf-neutral-200);
}
.btn--outline:hover {
  border-color: var(--gf-primary);
  color: var(--gf-primary);
}

.btn--dark {
  background: var(--gf-neutral-900);
  color: #fff;
}
.btn--dark:hover {
  background: var(--gf-neutral-700);
  transform: translateY(-1px);
  box-shadow: var(--gf-shadow-md);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0.875rem 1.25rem;
}

.nav__logo {
  font-family: var(--gf-font-heading);
  font-weight: 800;
  font-size: 1.375rem;
  color: var(--gf-neutral-900);
}
.nav__logo span {
  color: var(--gf-primary);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gf-neutral-600);
  transition: color 0.2s;
}
.nav__link:hover { color: var(--gf-primary); }

.hide-mobile { display: none; }

/* --- Hero --- */
.hero {
  padding: 7rem 0 3rem;
  background: linear-gradient(180deg, var(--gf-primary-bg) 0%, #fff 100%);
}

.hero .container {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.hero__badge {
  display: inline-block;
  background: #fff;
  border: 1px solid var(--gf-neutral-200);
  border-radius: var(--gf-radius-full);
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--gf-neutral-700);
  margin-bottom: 0.75rem;
}

.hero__title {
  font-family: var(--gf-font-heading);
  font-weight: 800;
  font-size: 2.25rem;
  line-height: 1.15;
  color: var(--gf-neutral-900);
  letter-spacing: -0.02em;
}

.hero__highlight {
  color: var(--gf-primary);
}

.hero__sub {
  margin-top: 1rem;
  font-size: 1.0625rem;
  color: var(--gf-neutral-600);
  line-height: 1.65;
  max-width: 480px;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.hero__social-proof {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.75rem;
  font-size: 0.875rem;
  color: var(--gf-neutral-500);
}

.hero__avatars {
  display: flex;
}

.hero__avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  font-size: 0.875rem;
  border: 2px solid #fff;
  margin-right: -0.5rem;
}
.hero__avatar:last-child { margin-right: 0; }

.hero__social-text strong {
  color: var(--gf-neutral-800);
}

/* Phone Mockup */
.hero__visual {
  display: flex;
  justify-content: center;
}

.phone-mockup {
  width: 260px;
  background: var(--gf-neutral-900);
  border-radius: 2rem;
  padding: 0.5rem;
  box-shadow: var(--gf-shadow-xl), 0 0 0 1px rgba(0,0,0,0.1);
  transform: rotate(2deg);
}

.phone-mockup__screen {
  background: #fff;
  border-radius: 1.625rem;
  padding: 1rem;
  min-height: 380px;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.phone-mockup__header {
  text-align: center;
  padding: 0.5rem 0 0.75rem;
}

.phone-mockup__logo {
  font-family: var(--gf-font-heading);
  font-weight: 800;
  font-size: 1rem;
  color: var(--gf-neutral-900);
}
.phone-mockup__logo span { color: var(--gf-primary); }

.phone-mockup__card {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  background: var(--gf-neutral-50);
  border: 1px solid var(--gf-neutral-200);
  border-radius: var(--gf-radius-lg);
  padding: 0.75rem;
  animation: cardSlideIn 0.6s ease both;
}
.phone-mockup__card:nth-child(3) { animation-delay: 0.2s; }
.phone-mockup__card:nth-child(4) { animation-delay: 0.4s; }

.phone-mockup__card--alt {
  background: var(--gf-secondary-bg);
  border-color: rgba(45,106,79,0.15);
}

.phone-mockup__food-emoji {
  font-size: 1.75rem;
  flex-shrink: 0;
}

.phone-mockup__card-text {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  flex: 1;
  min-width: 0;
}

.phone-mockup__card-text strong {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--gf-neutral-800);
}

.phone-mockup__card-text small {
  font-size: 0.6875rem;
  color: var(--gf-neutral-400);
}

.phone-mockup__badge {
  flex-shrink: 0;
  background: var(--gf-primary);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 0.25rem 0.625rem;
  border-radius: var(--gf-radius-full);
}

.phone-mockup__badge--green {
  background: var(--gf-secondary);
}

@keyframes cardSlideIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- How It Works --- */
.how-it-works {
  padding: 4rem 0;
}

.section-title {
  font-family: var(--gf-font-heading);
  font-weight: 800;
  font-size: 1.75rem;
  color: var(--gf-neutral-900);
  text-align: center;
  letter-spacing: -0.02em;
}

.section-sub {
  text-align: center;
  color: var(--gf-neutral-500);
  margin-top: 0.5rem;
  font-size: 1rem;
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-top: 2.5rem;
}

.step {
  text-align: center;
  position: relative;
  padding: 1.5rem;
}

.step__icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--gf-primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
}

.step__title {
  font-family: var(--gf-font-heading);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--gf-neutral-800);
  margin-bottom: 0.5rem;
}

.step__desc {
  color: var(--gf-neutral-500);
  font-size: 0.9375rem;
  line-height: 1.6;
  max-width: 320px;
  margin: 0 auto;
}

/* --- Features --- */
.features {
  padding: 4rem 0;
  background: var(--gf-neutral-50);
}

.features__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 2.5rem;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--gf-neutral-200);
  border-radius: var(--gf-radius-xl);
  padding: 1.5rem;
  transition: transform 0.2s, box-shadow 0.2s;
}
.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--gf-shadow-md);
}

.feature-card__icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.feature-card__title {
  font-family: var(--gf-font-heading);
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--gf-neutral-800);
  margin-bottom: 0.375rem;
}

.feature-card__desc {
  color: var(--gf-neutral-500);
  font-size: 0.9375rem;
  line-height: 1.55;
}

/* --- Testimonial --- */
.testimonial {
  padding: 4rem 0;
  text-align: center;
}

.testimonial__quote {
  font-family: var(--gf-font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--gf-neutral-800);
  max-width: 600px;
  margin: 0 auto;
  font-style: italic;
}

.testimonial__author {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.testimonial__avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  background: var(--gf-accent-bg);
  border-radius: 50%;
  font-size: 1.25rem;
}

.testimonial__author strong {
  display: block;
  font-size: 0.9375rem;
  color: var(--gf-neutral-800);
}

.testimonial__author span {
  font-size: 0.8125rem;
  color: var(--gf-neutral-500);
}

/* --- Download CTA --- */
.download {
  padding: 4rem 0;
  background: linear-gradient(135deg, var(--gf-primary) 0%, var(--gf-primary-dark) 100%);
  text-align: center;
  color: #fff;
}

.download__title {
  font-family: var(--gf-font-heading);
  font-weight: 800;
  font-size: 2rem;
  letter-spacing: -0.02em;
}

.download__sub {
  margin-top: 0.75rem;
  font-size: 1.0625rem;
  opacity: 0.9;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.download__buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 2rem;
}

.download__store-btn {
  min-width: 160px;
}

.download__store-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.download__note {
  margin-top: 1.5rem;
  font-size: 0.875rem;
  opacity: 0.75;
}
.download__note a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.download__note a:hover {
  opacity: 0.8;
}

/* --- Footer --- */
.footer {
  padding: 2.5rem 0 1.5rem;
  background: var(--gf-neutral-900);
  color: var(--gf-neutral-400);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer__logo {
  font-family: var(--gf-font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  color: #fff;
}
.footer__logo span { color: var(--gf-primary); }

.footer__tagline {
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.footer__links a {
  font-size: 0.875rem;
  color: var(--gf-neutral-400);
  transition: color 0.2s;
}
.footer__links a:hover { color: #fff; }

.footer__copy {
  text-align: center;
  font-size: 0.8125rem;
  padding-top: 1.5rem;
  color: var(--gf-neutral-500);
}

/* ============================================
   Tablet+ (640px)
   ============================================ */
@media (min-width: 640px) {
  .hide-mobile { display: inline; }

  .hero__title { font-size: 2.75rem; }

  .steps {
    flex-direction: row;
    gap: 1.5rem;
  }
  .step { flex: 1; }

  .features__grid {
    grid-template-columns: 1fr 1fr;
  }

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

/* ============================================
   Desktop (960px)
   ============================================ */
@media (min-width: 960px) {
  .hero .container {
    flex-direction: row;
    align-items: center;
    gap: 4rem;
  }

  .hero__content { flex: 1; }
  .hero__visual { flex: 0 0 auto; }

  .hero__title { font-size: 3.25rem; }

  .hero {
    padding: 8rem 0 5rem;
  }

  .section-title { font-size: 2.25rem; }

  .how-it-works,
  .features,
  .testimonial {
    padding: 5rem 0;
  }

  .features__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .testimonial__quote {
    font-size: 1.5rem;
  }

  .download {
    padding: 5rem 0;
  }

  .download__title { font-size: 2.5rem; }

  .phone-mockup {
    width: 300px;
  }

  .phone-mockup__screen {
    min-height: 440px;
  }
}