/* ========================================
   Untabbed Landing Page — styles.css
   ======================================== */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

/* --- Custom Properties (Light Mode) --- */
:root {
  --color-primary: #006b64;
  --color-primary-container: #73f1e4;
  --color-primary-dim: #005e57;
  --color-on-primary: #e2fffa;

  --color-secondary: #6e49b6;
  --color-secondary-container: #eaddff;
  --color-on-secondary-container: #603aa7;

  --color-background: #f7fafc;
  --color-surface: #f7fafc;
  --color-surface-card: #ffffff;
  --color-surface-low: #f0f4f7;
  --color-surface-container: #e9eff2;
  --color-surface-high: #e2e9ed;

  --color-on-surface: #2c3437;
  --color-on-surface-variant: #586064;
  --color-outline: #747c80;
  --color-outline-variant: #abb3b7;

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

  --radius-sm: 0.5rem;
  --radius-default: 1rem;
  --radius-md: 1.5rem;
  --radius-lg: 2rem;
  --radius-full: 9999px;

  --shadow-card: 0 8px 32px rgba(44, 52, 55, 0.04);
  --shadow-elevated: 0 8px 48px rgba(44, 52, 55, 0.06);

  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  --nav-bg: rgba(255, 255, 255, 0.8);
}

/* --- Dark Mode --- */
@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #73f1e4;
    --color-primary-container: #005e57;
    --color-primary-dim: #005e57;
    --color-on-primary: #00443f;

    --color-secondary: #deccff;
    --color-secondary-container: #4d2593;
    --color-on-secondary-container: #eaddff;

    --color-background: #0b0f10;
    --color-surface: #111618;
    --color-surface-card: #1a1f22;
    --color-surface-low: #1a1f22;
    --color-surface-container: #222829;
    --color-surface-high: #2c3437;

    --color-on-surface: #e2e9ed;
    --color-on-surface-variant: #abb3b7;
    --color-outline: #747c80;
    --color-outline-variant: #586064;

    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-elevated: 0 8px 48px rgba(0, 0, 0, 0.3);

    --nav-bg: rgba(17, 22, 24, 0.8);
  }
}

/* --- Typography & Body --- */
body {
  font-family: var(--font-body);
  color: var(--color-on-surface);
  background-color: var(--color-background);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-family: var(--font-headline);
  line-height: 1.2;
  font-weight: 700;
}

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

a:hover {
  opacity: 0.85;
}

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

/* --- Utilities --- */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-label {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.section-heading {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.section-subheading {
  font-size: 1.125rem;
  color: var(--color-on-surface-variant);
  max-width: 600px;
}

/* --- Animation Easing --- */
:root {
  --ease-out-snappy: cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Scroll Animations --- */

/* Fade + slide up: for headings, labels, body text */
.anim-slide-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 500ms var(--ease-out-snappy), transform 500ms var(--ease-out-snappy);
}

.anim-slide-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Fade + scale up: for cards, tiles, phone mockup */
.anim-scale-up {
  opacity: 0;
  transform: scale(0.95) translateY(12px);
  transition: opacity 500ms var(--ease-out-snappy), transform 500ms var(--ease-out-snappy);
}

.anim-scale-up.is-visible {
  opacity: 1;
  transform: scale(1) translateY(0);
}

/* Fade only: for subtle elements */
.anim-fade {
  opacity: 0;
  transition: opacity 450ms var(--ease-out-snappy);
}

.anim-fade.is-visible {
  opacity: 1;
}

/* Hero entrance: fires immediately on load, no scroll trigger */
.anim-hero-entrance {
  opacity: 0;
  transform: translateY(20px);
  animation: heroEntrance 600ms var(--ease-out-snappy) forwards;
}

.anim-hero-entrance.delay-1 { animation-delay: 80ms; }
.anim-hero-entrance.delay-2 { animation-delay: 160ms; }
.anim-hero-entrance.delay-3 { animation-delay: 280ms; }

@keyframes heroEntrance {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Stagger children in grids: 70ms apart */
.stagger-children > :nth-child(1) { transition-delay: 0ms; }
.stagger-children > :nth-child(2) { transition-delay: 70ms; }
.stagger-children > :nth-child(3) { transition-delay: 140ms; }
.stagger-children > :nth-child(4) { transition-delay: 210ms; }
.stagger-children > :nth-child(5) { transition-delay: 280ms; }
.stagger-children > :nth-child(6) { transition-delay: 350ms; }

/* Legacy class support — map to slide-up */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 500ms var(--ease-out-snappy), transform 500ms var(--ease-out-snappy);
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  .anim-slide-up,
  .anim-scale-up,
  .anim-fade,
  .animate-on-scroll {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .anim-hero-entrance {
    opacity: 1;
    transform: none;
    animation: none;
  }

  .phone-mockup {
    animation: none;
    opacity: 1;
  }

  .hero::before,
  .hero::after {
    animation: none;
  }
}

/* ========================================
   Header / Navigation
   ======================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.site-logo {
  font-family: var(--font-headline);
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-on-surface-variant);
  transition: color var(--transition-base);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
  opacity: 1;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-on-surface);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: var(--transition-base);
}

.nav-toggle span + span {
  margin-top: 5px;
}

/* Mobile Nav */
@media (max-width: 767px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 4rem;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 0.5rem 0;
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links li {
    padding: 0.75rem 1.5rem;
  }
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  padding: 7rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 3rem;
}

.hero-content {
  max-width: 560px;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-on-surface-variant);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.app-store-badge {
  display: inline-block;
  transition: transform var(--transition-base);
}

.app-store-badge:hover {
  transform: translateY(-2px);
  opacity: 1;
}

.app-store-badge img,
.app-store-badge svg {
  height: 48px;
  width: auto;
}

/* Phone Mockup */
.phone-mockup {
  position: relative;
  width: 260px;
  flex-shrink: 0;
  animation: heroEntrance 600ms var(--ease-out-snappy) 280ms forwards,
             float 6s ease-in-out 900ms infinite;
  opacity: 0;
}

.phone-frame {
  border-radius: 36px;
  overflow: hidden;
  box-shadow: var(--shadow-elevated);
  border: 6px solid var(--color-surface-high);
  background: var(--color-surface-card);
}

.phone-frame img {
  width: 100%;
  display: block;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Decorative Orbs */
.hero::before,
.hero::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
  pointer-events: none;
  animation: pulse 8s ease-in-out infinite;
}

.hero::before {
  width: 400px;
  height: 400px;
  background: var(--color-primary-container);
  top: -100px;
  right: -100px;
}

.hero::after {
  width: 300px;
  height: 300px;
  background: var(--color-secondary-container);
  bottom: -50px;
  left: -80px;
  animation-delay: 4s;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.15; }
  50% { transform: scale(1.15); opacity: 0.25; }
}

/* Desktop hero */
@media (min-width: 1024px) {
  .hero {
    padding: 8rem 0 5rem;
  }

  .hero .container {
    flex-direction: row;
    text-align: left;
    gap: 4rem;
  }

  .hero h1 {
    font-size: 3.25rem;
  }

  .hero-subtitle {
    font-size: 1.1875rem;
  }

  .phone-mockup {
    width: 300px;
  }
}

/* ========================================
   How It Works
   ======================================== */
.how-it-works {
  padding: 5rem 0;
  background: var(--color-surface-low);
}

.how-it-works .section-heading,
.how-it-works .section-label {
  text-align: center;
}

.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 3rem;
}

.step-card {
  background: var(--color-surface-card);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-elevated);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-container));
  color: #fff;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 1rem;
}

.step-icon {
  font-size: 2.5rem;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.step-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.step-card p {
  font-size: 0.9375rem;
  color: var(--color-on-surface-variant);
  line-height: 1.6;
}

@media (min-width: 768px) {
  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ========================================
   Features
   ======================================== */
.features {
  padding: 5rem 0;
}

.features .section-heading,
.features .section-label,
.features .section-subheading {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 3rem;
}

.feature-card {
  background: var(--color-surface-card);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-elevated);
}

.feature-icon {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.feature-card h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--color-on-surface-variant);
  line-height: 1.6;
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ========================================
   Pricing
   ======================================== */
.pricing {
  padding: 5rem 0;
  background: var(--color-surface-low);
}

.pricing .section-heading,
.pricing .section-label {
  text-align: center;
}

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 3rem;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.pricing-card {
  background: var(--color-surface-card);
  border-radius: var(--radius-md);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}

.pricing-card.featured {
  position: relative;
  box-shadow: var(--shadow-elevated);
}

.pricing-card.featured::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: calc(var(--radius-md) + 2px);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-container));
  z-index: -1;
}

.pricing-badge {
  display: inline-block;
  font-family: var(--font-headline);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.375rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.25rem;
  width: fit-content;
}

.pricing-card:not(.featured) .pricing-badge {
  background: var(--color-surface-container);
  color: var(--color-on-surface-variant);
}

.pricing-card.featured .pricing-badge {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-container));
  color: #fff;
}

.pricing-price {
  font-family: var(--font-headline);
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.pricing-note {
  font-size: 0.875rem;
  color: var(--color-on-surface-variant);
  margin-bottom: 1.5rem;
}

.pricing-features {
  list-style: none;
  flex: 1;
  margin-bottom: 2rem;
}

.pricing-features li {
  padding: 0.5rem 0;
  font-size: 0.9375rem;
  color: var(--color-on-surface-variant);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.pricing-features .material-symbols-outlined {
  font-size: 1.25rem;
  color: var(--color-primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-headline);
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  text-align: center;
}

.btn:hover {
  transform: translateY(-2px);
  opacity: 1;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-container));
  color: #fff;
  box-shadow: 0 4px 16px rgba(0, 107, 100, 0.2);
}

.btn-primary:hover {
  box-shadow: 0 6px 24px rgba(0, 107, 100, 0.3);
  color: #fff;
}

.btn-secondary {
  background: var(--color-surface-container);
  color: var(--color-on-surface);
}

.tip-jar {
  text-align: center;
  margin-top: 2.5rem;
  font-size: 0.9375rem;
  color: var(--color-on-surface-variant);
}

.tip-jar .material-symbols-outlined {
  font-size: 1.125rem;
  vertical-align: middle;
  color: var(--color-primary);
}

@media (min-width: 768px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
  padding: 3rem 0 2rem;
  background: var(--color-surface);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand .site-logo {
  margin-bottom: 0.5rem;
}

.footer-brand p {
  font-size: 0.9375rem;
  color: var(--color-on-surface-variant);
}

.footer-links h4 {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-on-surface-variant);
  margin-bottom: 0.75rem;
}

.footer-links ul {
  list-style: none;
}

.footer-links li + li {
  margin-top: 0.5rem;
}

.footer-links a {
  font-size: 0.9375rem;
  color: var(--color-on-surface-variant);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  padding-top: 1.5rem;
  font-size: 0.8125rem;
  color: var(--color-outline);
  text-align: center;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

/* ========================================
   App Screenshots Section (optional showcase)
   ======================================== */
.screenshots {
  padding: 5rem 0;
}

.screenshots .section-heading,
.screenshots .section-label {
  text-align: center;
}

.screenshots-row {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 3rem;
  flex-wrap: wrap;
}

.screenshot-item {
  width: 200px;
  flex-shrink: 0;
}

.screenshot-item .phone-frame {
  border-radius: 28px;
  border-width: 4px;
}