:root {
  /* COLORS */
  --color-bg: #050505;
  --color-surface: #11131a;
  --color-surface-alt: #151924;
  --color-card: #1d2130;
  --color-border: #2a3045;
  --color-border-light: rgba(255, 255, 255, 0.08);

  --color-text: #f7f9ff;
  --color-text-muted: #949ab0;
  --color-text-dim: #636979;

  /* Accent: Vibrant Green */
  --color-accent: #34c759;
  --color-accent-hover: #2aa34a;
  --color-accent-glow: rgba(52, 199, 89, 0.4);

  /* Functional */
  --color-danger: #ff453a;
  --color-warning: #ff9f0a;
  --color-success: #32d74b;

  /* TYPOGRAPHY */
  --font-sans: "Inter", "SF Pro Display", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-size-sm: 0.875rem;
  /* 14px */
  --font-size-base: 1rem;
  /* 16px */
  --font-size-lg: 1.25rem;
  /* 20px */
  --font-size-xl: 1.5rem;
  /* 24px */
  --font-size-2xl: 2.25rem;
  /* 36px */
  --font-size-3xl: 3rem;
  /* 48px */
  --font-size-hero: clamp(2.5rem, 6vw, 4.5rem);

  /* SPACING */
  --space-1: 0.5rem;
  /* 8px */
  --space-2: 1rem;
  /* 16px */
  --space-3: 1.5rem;
  /* 24px */
  --space-4: 2rem;
  /* 32px */
  --space-5: 3rem;
  /* 48px */
  --space-6: 5rem;
  /* 80px */

  /* LAYOUT */
  --container-width: 1100px;
  --header-height: 70px;

  /* EFFECTS */
  --radius-sm: 0.75rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-pill: 9999px;

  --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px var(--color-accent-glow);

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* RESET & BASE */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--color-bg);
  background-image: radial-gradient(circle at 50% 0%, #1a1f2e 0%, transparent 40%);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.1;
  margin: 0 0 var(--space-2) 0;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

p {
  margin: 0 0 var(--space-3) 0;
  color: var(--color-text-muted);
}

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

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

/* UTILITIES */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}

.center-text {
  text-align: center;
}

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

/* COMPONENTS */

/* Buttons */
.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  padding: 0.8em 1.6em;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  text-decoration: none;
  gap: 0.5rem;
}

.button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

.button--primary {
  background: var(--color-accent);
  color: #031a0b;
  box-shadow: 0 4px 15px var(--color-accent-glow);
}

.button--primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--color-accent-glow);
}

.button--ghost {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
  backdrop-filter: blur(8px);
  border: 1px solid var(--color-border-light);
}

.button--ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.button--danger {
  background: var(--color-danger);
  color: #2d0b06;
  box-shadow: 0 4px 15px rgba(255, 69, 58, 0.35);
}

.button--danger:hover {
  background: #ff6b62;
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(255, 69, 58, 0.35);
}

.button--wide {
  min-width: 200px;
}

/* Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(5, 5, 5, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
}

.app-header .brand {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  color: white;
}

.app-header .welcome-message {
  font-size: var(--font-size-sm);
  margin: 0;
}

/* Landing / Hero */
.landing {
  padding: var(--space-6) 0;
}

.hero {
  text-align: left;
}

.hero__grid {
  display: grid;
  gap: var(--space-5);
}

@media (min-width: 900px) {
  .hero__grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}

.hero h1 {
  font-size: var(--font-size-hero);
  line-height: 1.05;
  margin-bottom: var(--space-3);
  background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__lede {
  font-size: var(--font-size-lg);
  max-width: 50ch;
  margin-bottom: var(--space-4);
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  padding: 0.35em 1em;
  margin-bottom: var(--space-3);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--color-border-light);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.hero__meta {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
  justify-content: space-between;
}

.hero__metric {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1;
}

/* Cards & Surfaces */
.surface {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  border: 1px solid var(--color-border);
}

.surface--alt {
  background: var(--color-surface-alt);
}

.card {
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border);
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: white;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  border: 1px solid var(--color-border-light);
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
}

.badge--success {
  border-color: rgba(52, 199, 89, 0.35);
  color: #a3ffb7;
  background: rgba(52, 199, 89, 0.1);
}

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

.meta-grid {
  display: grid;
  gap: var(--space-2);
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.feature-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Media Frames */
.media-frame {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: #101216;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.media-frame__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-frame--wide {
  aspect-ratio: 16 / 9;
}

.media-frame--phone {
  aspect-ratio: 9 / 19;
  /* Phone ratio */
  max-width: 320px;
  margin: 0 auto;
  border-radius: 2rem;
  border: 4px solid #2a3045;
}

.media-frame--collab {
  aspect-ratio: 21 / 9;
}

/* Steps Flow */
.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: step-counter;
}

.steps__item {
  position: relative;
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
}

.steps__number {
  font-family: monospace;
  font-size: 1.5rem;
  color: var(--color-accent);
  opacity: 0.8;
}

/* Trust Section */
.trust {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .trust {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}

.checks {
  list-style: none;
  padding: 0;
}

.checks li {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
}

.checks li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 800;
}

/* CTA Card */
.cta-card {
  background: radial-gradient(circle at top right, #34c759 0%, #007aff 100%);
  color: white;
  text-align: center;
  padding: var(--space-6) var(--space-3);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.cta-card h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-2);
}

.cta-card p {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-4);
}

.cta-card .media-frame {
  margin: var(--space-4) auto;
  max-width: 600px;
  background: transparent;
  border: none;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

/* Flash Messages */
.flash {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flash.notice,
.flash.success {
  background: rgba(52, 199, 89, 0.2);
  border: 1px solid var(--color-success);
  color: #a3ffb7;
}

.flash.alert,
.flash.error {
  background: rgba(255, 69, 58, 0.2);
  border: 1px solid var(--color-danger);
  color: #ffb3b3;
}

/* Turbo Progress Bar */
.turbo-progress-bar {
  background: var(--color-accent);
  height: 3px;
  box-shadow: 0 0 10px var(--color-accent);
}

/* Forms */
input[type="text"],
input[type="email"],
input[type="password"] {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  color: white;
  padding: 0.75em 1em;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  width: 100%;
  transition: border-color var(--transition-fast);
}

.form-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: var(--space-4);
  gap: var(--space-3);
}

.field label {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 700;
  color: var(--color-text);
}

.hint {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-top: 0.35rem;
}


/* NAVBAR COMPONENT */
.app-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(5, 5, 5, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border-light);
  height: var(--header-height);
  transition: all var(--transition-base);
}

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

.brand-link {
  text-decoration: none;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-text {
  background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Desktop Nav */
.app-nav__desktop {
  display: none;
}

@media (min-width: 768px) {
  .app-nav__desktop {
    display: flex;
    gap: var(--space-4);
    align-items: center;
  }
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

/* Dropdown */
.nav-dropdown {
  position: relative;
  padding: 1rem 0;
  /* Increase hit area */
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 0.5rem;
  min-width: 200px;
  box-shadow: var(--shadow-md);
  opacity: 1;
  visibility: visible;
  transition: all var(--transition-fast);
  margin-top: -0.5rem;
  /* Pull up slightly */
}

.nav-dropdown-menu.hidden {
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-10px);
  pointer-events: none;
}

.dropdown-item {
  display: block;
  padding: 0.6rem 1rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.dropdown-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
}

.dropdown-divider {
  height: 1px;
  background: var(--color-border-light);
  margin: 0.5rem 0;
}

/* Mobile Toggle */
.mobile-toggle {
  display: block;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

@media (min-width: 768px) {
  .mobile-toggle {
    display: none;
  }

  .desktop-only {
    display: flex !important;
  }
}

.app-nav__actions.desktop-only {
  display: none;
  align-items: center;
  gap: var(--space-3);
}

.user-greeting {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.button--sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

/* Hamburger Icon */
.hamburger-box {
  width: 24px;
  height: 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.hamburger-inner {
  width: 20px;
  height: 2px;
  background: var(--color-text);
  position: relative;
}

.hamburger-inner::before,
.hamburger-inner::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  left: 0;
}

.hamburger-inner::before {
  top: -6px;
}

.hamburger-inner::after {
  top: 6px;
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  inset: var(--header-height) 0 0 0;
  background: var(--color-bg);
  z-index: 999;
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-border-light);
  overflow-y: auto;
  animation: slideDown var(--transition-base);
}

.mobile-menu.hidden {
  display: none;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }

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

.mobile-nav-link {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border-light);
}

.mobile-nav-group {
  margin-top: var(--space-3);
}

.mobile-nav-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
  display: block;
}

.mobile-nav-link.sub-link {
  font-size: 1rem;
  font-weight: 400;
  padding: 0.75rem 0 0.75rem 1rem;
  color: var(--color-text-muted);
  border-bottom: none;
}

.button--full {
  width: 100%;
  margin-top: var(--space-4);
}