/* Custom Premium Styling for Spendsible Landing Page */

:root {
  --bg-color: #080B10;
  --panel-bg: rgba(13, 17, 23, 0.7);
  --border-color: rgba(74, 222, 128, 0.15);
  --border-hover: rgba(74, 222, 128, 0.4);
  --accent-color: #4ADE80;
  --accent-glow: rgba(74, 222, 128, 0.2);
  --text-primary: #FFFFFF;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --transition-speed: 0.3s;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: hidden;
  position: relative;
}

/* Glowing Background Blobs */
body::before {
  content: '';
  position: absolute;
  top: -10%;
  right: -5%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(74, 222, 128, 0.08) 0%, rgba(8, 11, 16, 0) 70%);
  z-index: -1;
  pointer-events: none;
}

body::after {
  content: '';
  position: absolute;
  top: 40%;
  left: -10%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(74, 222, 128, 0.05) 0%, rgba(8, 11, 16, 0) 70%);
  z-index: -1;
  pointer-events: none;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all var(--transition-speed) ease;
}

/* --- NAV BAR --- */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(8, 11, 16, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
}

.nav-link:hover {
  color: var(--accent-color);
}

.btn-open-app {
  background-color: var(--accent-color);
  color: #080B10;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 8px;
  box-shadow: 0 0 20px var(--accent-glow);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.btn-open-app:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(74, 222, 128, 0.4);
}

.hamburger {
  display: none;
  cursor: pointer;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 24px;
}

/* --- HERO SECTION --- */
.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px 100px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
  gap: 48px;
  min-height: calc(100vh - 80px);
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
}

.hero h1 {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
}

.hero h1 span {
  background: linear-gradient(135deg, #FFFFFF 30%, var(--accent-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 20px;
  color: var(--text-secondary);
  max-width: 520px;
  line-height: 1.6;
}

.btn-hero {
  background-color: transparent;
  border: 2px solid var(--accent-color);
  color: var(--accent-color);
  font-size: 16px;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-hero:hover {
  background-color: var(--accent-color);
  color: #080B10;
  transform: translateY(-2px);
  box-shadow: 0 0 30px var(--accent-glow);
}

.hero-graphic {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.graphic-blob {
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(74, 222, 128, 0.25) 0%, rgba(8, 11, 16, 0) 70%);
  border-radius: 50%;
  filter: blur(20px);
  position: absolute;
  z-index: 1;
}

.device-outline {
  width: 280px;
  height: 560px;
  border: 4px solid rgba(255, 255, 255, 0.1);
  border-radius: 40px;
  background-color: rgba(8, 11, 16, 0.6);
  backdrop-filter: blur(10px);
  z-index: 2;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.device-outline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(180deg, rgba(74, 222, 128, 0.1) 0%, rgba(8, 11, 16, 0) 100%);
  pointer-events: none;
}

.device-notch {
  width: 110px;
  height: 18px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  margin: 0 auto 12px;
}

.device-ui-bar {
  height: 4px;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: 2px;
  margin-bottom: 8px;
}

.device-ui-bar.short {
  width: 60%;
}

.device-ui-bar.medium {
  width: 80%;
}

.device-ui-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid rgba(74, 222, 128, 0.2);
  margin-bottom: 24px;
}

/* --- FEATURE GRID --- */
.features-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.section-header p {
  font-size: 18px;
  color: var(--text-secondary);
}

.grid-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-tile {
  background-color: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all var(--transition-speed) ease;
  overflow: hidden;
}

.feature-tile:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: 0 12px 40px rgba(74, 222, 128, 0.08);
}

.primary-icon-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 56px;
  height: 56px;
  background-color: rgba(74, 222, 128, 0.05);
  border-radius: 12px;
  border: 1px solid rgba(74, 222, 128, 0.1);
  align-self: flex-start;
  transition: all var(--transition-speed) ease;
}

.feature-tile:hover .primary-icon-container {
  background-color: rgba(74, 222, 128, 0.1);
  border-color: rgba(74, 222, 128, 0.3);
}

.primary-icon {
  font-size: 28px;
  color: var(--accent-color);
}

.feature-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.secondary-icon {
  position: absolute;
  bottom: 16px;
  right: 16px;
  font-size: 16px;
  color: var(--text-muted);
  opacity: 0.5;
  transition: all var(--transition-speed) ease;
}

.feature-tile:hover .secondary-icon {
  color: var(--accent-color);
  opacity: 0.8;
  transform: scale(1.1);
}

/* --- SCREENSHOT PLACEHOLDER SECTION --- */
.screenshot-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 24px;
}

.screenshot-placeholder {
  height: 380px;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px dashed rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 16px;
  color: var(--text-muted);
  transition: all var(--transition-speed) ease;
}

.screenshot-placeholder:hover {
  background-color: rgba(255, 255, 255, 0.04);
  border-color: var(--accent-color);
  color: var(--text-secondary);
}

.screenshot-placeholder span.material-symbols-outlined {
  font-size: 48px;
}

.screenshot-caption {
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
  margin-top: 16px;
}

/* --- PRIVACY CALLOUT BANNER --- */
.privacy-banner {
  background-color: #0A0F16;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding: 60px 24px;
  margin: 60px 0;
}

.privacy-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 40px;
}

.privacy-icon-lg {
  font-size: 64px;
  color: var(--accent-color);
  background-color: rgba(74, 222, 128, 0.05);
  padding: 20px;
  border-radius: 20px;
  border: 1px solid rgba(74, 222, 128, 0.15);
}

.privacy-text {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.privacy-text h3 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.privacy-text p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 800px;
}

/* --- DOWNLOAD SECTION --- */
.download-section {
  max-width: 800px;
  margin: 0 auto;
  padding: 80px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.download-section h2 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -1px;
}

.download-section p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
}

.badge-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: 12px;
  margin-bottom: 12px;
}

.store-badge img {
  height: 40px;
  display: block;
  transition: transform var(--transition-speed) ease;
}

.store-badge:hover img {
  transform: translateY(-2px);
}

.btn-web-ghost {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 1px dashed var(--text-muted);
  padding-bottom: 2px;
}

.btn-web-ghost:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
}

/* --- FOOTER --- */
footer {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  background-color: #05070A;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-link:hover {
  color: var(--accent-color);
}

/* --- RESPONSIVE MEDIA QUERIES --- */

/* Tablet & Mobile Viewports */
@media (max-width: 1023px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 40px;
    padding-bottom: 60px;
    min-height: auto;
  }

  .hero-content {
    align-items: center;
  }

  .hero h1 {
    font-size: 44px;
  }

  .hero-graphic {
    display: none; /* Hide side graphic on mobile as requested in T-406 */
  }

  .grid-container {
    grid-template-columns: repeat(2, 1fr);
  }

  .screenshot-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Strict Mobile Screen (<= 768px) */
@media (max-width: 768px) {
  .hamburger {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-color);
    flex-direction: column;
    padding: 40px 24px;
    gap: 32px;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-speed) ease;
    z-index: 99;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-menu .nav-link {
    font-size: 18px;
  }

  .grid-container {
    grid-template-columns: 1fr; /* Single column stack */
  }

  .screenshot-grid {
    grid-template-columns: 1fr; /* Stacked layout */
  }

  .privacy-container {
    flex-direction: column;
    text-align: center;
    gap: 24px;
  }

  .badge-container {
    flex-direction: column;
    width: 100%;
  }

  .store-badge img {
    width: 100%;
    max-width: 200px;
    height: auto;
    margin: 0 auto;
  }

  .footer-container {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }

  .footer-links {
    flex-direction: column;
    gap: 16px;
  }
}