/* ============================================================
   NEIGHBORHOOD SMART VAULT — SHARED DESIGN SYSTEM
   All pages must import this file. Do not override variables.
   ============================================================ */

/* ── Google Font ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ── Design Tokens ── */
:root {
  /* Colors */
  --color-white:       #FFFFFF;
  --color-bg:          #FAFAFA;
  --color-bg-alt:      #F3F6FF;
  --color-surface:     #FFFFFF;
  --color-border:      #E5E8F0;

  --color-blue:        #0057FF;
  --color-blue-dark:   #0040CC;
  --color-blue-light:  #E8F0FF;
  --color-blue-glow:   rgba(0, 87, 255, 0.12);

  --color-text:        #0D0D1A;
  --color-text-muted:  #6B7280;
  --color-text-light:  #9CA3AF;

  --color-success:     #10B981;
  --color-warning:     #F59E0B;

  /* Typography */
  --font-family:       'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-xs:      0.75rem;    /* 12px */
  --font-size-sm:      0.875rem;   /* 14px */
  --font-size-base:    1rem;       /* 16px */
  --font-size-lg:      1.125rem;   /* 18px */
  --font-size-xl:      1.25rem;    /* 20px */
  --font-size-2xl:     1.5rem;     /* 24px */
  --font-size-3xl:     1.875rem;   /* 30px */
  --font-size-4xl:     2.25rem;    /* 36px */
  --font-size-5xl:     3rem;       /* 48px */
  --font-size-6xl:     3.75rem;    /* 60px */
  --font-size-7xl:     4.5rem;     /* 72px */

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --container-max:     1200px;
  --container-wide:    1400px;
  --container-narrow:  800px;

  /* Radius */
  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   20px;
  --radius-xl:   32px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:   0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:   0 4px 16px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg:   0 10px 40px rgba(0,0,0,0.10), 0 4px 8px rgba(0,0,0,0.04);
  --shadow-blue: 0 8px 32px rgba(0, 87, 255, 0.20);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;

  /* Nav height (used for scroll offset) */
  --nav-height: 72px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
ul, ol { list-style: none; }
input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.container--wide { max-width: var(--container-wide); }
.container--narrow { max-width: var(--container-narrow); }

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.nav.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: var(--font-size-lg);
  color: var(--color-text);
  letter-spacing: -0.02em;
}
.nav__logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-blue);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav__logo-icon svg {
  width: 20px;
  height: 20px;
  fill: white;
}
.nav__logo-text span {
  color: var(--color-blue);
}
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.nav__link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  position: relative;
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-blue);
  border-radius: var(--radius-full);
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}
.nav__link:hover,
.nav__link.active {
  color: var(--color-text);
}
.nav__link:hover::after,
.nav__link.active::after {
  transform: scaleX(1);
}
.nav__cta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.nav__menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}
.nav__menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base);
}
.nav__mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--color-white);
  padding: var(--space-6);
  border-bottom: 1px solid var(--color-border);
  flex-direction: column;
  gap: var(--space-4);
  z-index: 999;
}
.nav__mobile-menu.open { display: flex; }
.nav__mobile-link {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-fast);
}
.nav__mobile-link:hover { color: var(--color-blue); }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.625rem var(--space-5);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  transition: all var(--transition-fast);
  white-space: nowrap;
  letter-spacing: 0.01em;
}
.btn--primary {
  background: var(--color-blue);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(0, 87, 255, 0.30);
}
.btn--primary:hover {
  background: var(--color-blue-dark);
  box-shadow: 0 6px 20px rgba(0, 87, 255, 0.40);
  transform: translateY(-1px);
}
.btn--primary:active { transform: translateY(0); }
.btn--secondary {
  background: var(--color-white);
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.btn--secondary:hover {
  border-color: var(--color-blue);
  color: var(--color-blue);
  transform: translateY(-1px);
}
.btn--ghost {
  color: var(--color-blue);
  background: var(--color-blue-light);
  border: 1.5px solid transparent;
}
.btn--ghost:hover {
  border-color: var(--color-blue);
  transform: translateY(-1px);
}
.btn--lg {
  padding: 0.875rem var(--space-8);
  font-size: var(--font-size-base);
  border-radius: var(--radius-full);
}
.btn--sm {
  padding: 0.4rem var(--space-4);
  font-size: var(--font-size-xs);
}

/* ── Typography ── */
.display-1 {
  font-size: clamp(var(--font-size-4xl), 7vw, var(--font-size-7xl));
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--color-text);
}
.display-2 {
  font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl));
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--color-text);
}
.heading-1 {
  font-size: clamp(var(--font-size-2xl), 3vw, var(--font-size-4xl));
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
}
.heading-2 {
  font-size: clamp(var(--font-size-xl), 2.5vw, var(--font-size-3xl));
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.heading-3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
}
.body-lg {
  font-size: var(--font-size-lg);
  line-height: 1.7;
  color: var(--color-text-muted);
}
.body-base {
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-text-muted);
}
.label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-blue);
}
.text-blue { color: var(--color-blue); }
.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }
.text-gradient {
  background: linear-gradient(135deg, var(--color-blue) 0%, #4DA6FF 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Section Layout ── */
.section {
  padding-block: var(--space-24);
}
.section--sm { padding-block: var(--space-16); }
.section--lg { padding-block: var(--space-32); }
.section--alt { background: var(--color-bg-alt); }
.section__header {
  max-width: 640px;
  margin-bottom: var(--space-16);
}
.section__header--center {
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-16);
  text-align: center;
}
.section__label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-blue);
  margin-bottom: var(--space-4);
}
.section__label::before {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-blue);
  border-radius: var(--radius-full);
}
.section__title {
  margin-bottom: var(--space-4);
}
.section__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ── Cards ── */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
}
.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: transparent;
}
.card--blue {
  background: var(--color-blue);
  color: var(--color-white);
  border-color: transparent;
}
.card--blue .card__title { color: var(--color-white); }
.card--blue .card__body { color: rgba(255,255,255,0.8); }
.card--glow {
  border-color: transparent;
  box-shadow: 0 0 0 1px var(--color-blue-light), var(--shadow-blue);
}
.card__icon {
  width: 48px;
  height: 48px;
  background: var(--color-blue-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  color: var(--color-blue);
}
.card--blue .card__icon {
  background: rgba(255,255,255,0.2);
  color: var(--color-white);
}
.card__icon svg { width: 24px; height: 24px; }
.card__label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-blue);
  margin-bottom: var(--space-3);
}
.card--blue .card__label { color: rgba(255,255,255,0.7); }
.card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.3;
}
.card__body {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ── Badge / Chip ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
}
.badge--blue {
  background: var(--color-blue-light);
  color: var(--color-blue);
  border: 1px solid rgba(0,87,255,0.15);
}
.badge--green {
  background: rgba(16,185,129,0.08);
  color: var(--color-success);
  border: 1px solid rgba(16,185,129,0.15);
}
.badge--dot::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: currentColor;
  display: block;
}

/* ── Stat Block ── */
.stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.stat__value {
  font-size: clamp(var(--font-size-3xl), 4vw, var(--font-size-5xl));
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--color-text);
  line-height: 1;
}
.stat__value span { color: var(--color-blue); }
.stat__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ── Divider ── */
.divider {
  height: 1px;
  background: var(--color-border);
  margin-block: var(--space-8);
}
.divider--blue {
  background: linear-gradient(90deg, transparent, var(--color-blue), transparent);
  height: 1px;
  border: none;
}

/* ── Grid helpers ── */
.grid { display: grid; }
.grid--2 { grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
.grid--3 { grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.grid--4 { grid-template-columns: repeat(4, 1fr); gap: var(--space-6); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--space-6); }

/* ── Flex helpers ── */
.flex { display: flex; }
.flex--center { align-items: center; justify-content: center; }
.flex--between { align-items: center; justify-content: space-between; }
.flex--gap-4 { gap: var(--space-4); }
.flex--gap-6 { gap: var(--space-6); }
.flex--gap-8 { gap: var(--space-8); }
.flex--wrap { flex-wrap: wrap; }

/* ── Spacing utilities ── */
.mt-4  { margin-top: var(--space-4); }
.mt-6  { margin-top: var(--space-6); }
.mt-8  { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mt-16 { margin-top: var(--space-16); }
.mb-4  { margin-bottom: var(--space-4); }
.mb-6  { margin-bottom: var(--space-6); }
.mb-8  { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }

/* ── Pill / Tag ── */
.tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-muted);
}

/* ── Form Elements ── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.form-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
}
.form-input {
  width: 100%;
  padding: 0.75rem var(--space-4);
  background: var(--color-white);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form-input:focus {
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px var(--color-blue-glow);
}
.form-input::placeholder { color: var(--color-text-light); }
.form-select {
  width: 100%;
  padding: 0.75rem var(--space-4);
  background: var(--color-white);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  background-size: 16px;
  cursor: pointer;
}
.form-select:focus {
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px var(--color-blue-glow);
}
.form-error {
  font-size: var(--font-size-xs);
  color: #EF4444;
  margin-top: var(--space-1);
}

/* ── Hero Section Base ── */
.hero {
  min-height: 100vh;
  padding-top: var(--nav-height);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.hero__bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.5;
  z-index: 0;
}
.hero__bg-glow {
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0, 87, 255, 0.08) 0%, transparent 70%);
  z-index: 0;
  pointer-events: none;
}
.hero__content {
  position: relative;
  z-index: 1;
}
.hero__bg-anim {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* ── Footer ── */
.footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.7);
  padding-block: var(--space-16) var(--space-8);
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}
.footer__brand-name {
  font-weight: 700;
  font-size: var(--font-size-lg);
  color: var(--color-white);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.footer__brand-icon {
  width: 30px;
  height: 30px;
  background: var(--color-blue);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.footer__brand-icon svg {
  width: 16px;
  height: 16px;
  fill: white;
}
.footer__tagline {
  font-size: var(--font-size-sm);
  line-height: 1.7;
  max-width: 280px;
}
.footer__col-title {
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: var(--space-5);
}
.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer__link {
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.6);
  transition: color var(--transition-fast);
}
.footer__link:hover { color: var(--color-white); }
.footer__bottom {
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer__copy {
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.4);
}
.footer__legal {
  display: flex;
  gap: var(--space-6);
}
.footer__legal-link {
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.4);
  transition: color var(--transition-fast);
}
.footer__legal-link:hover { color: rgba(255,255,255,0.7); }

/* ── Scroll Animations ── */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in {
  opacity: 0;
  transition: opacity 0.6s ease;
}
.fade-in.visible { opacity: 1; }
.slide-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.slide-left.visible { opacity: 1; transform: translateX(0); }
.slide-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.slide-right.visible { opacity: 1; transform: translateX(0); }
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  :root { --nav-height: 64px; }
  .nav__links, .nav__cta { display: none; }
  .nav__menu-toggle { display: flex; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
  .section { padding-block: var(--space-16); }
  .section--lg { padding-block: var(--space-20); }
}
@media (max-width: 480px) {
  .container { padding-inline: var(--space-4); }
  .btn--lg { padding: 0.75rem var(--space-6); font-size: var(--font-size-sm); }
}

/* ── Utility ── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}
.no-scroll { overflow: hidden; }

/* ── Accessibility ── */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 16px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
}
.skip-link:focus {
  position: fixed;
  left: 16px;
  width: auto;
  height: auto;
  padding: 12px 24px;
  background: var(--color-blue);
  color: #fff;
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: 6px;
  z-index: 9999;
  text-decoration: none;
  overflow: visible;
  clip: auto;
  outline: 3px solid #fff;
  outline-offset: 2px;
  box-shadow: var(--shadow-lg);
}
*:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 3px;
  border-radius: 4px;
}
.btn:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px rgba(0,87,255,0.2);
}
.nav__link:focus-visible,
.footer__link:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 4px;
  border-radius: 3px;
}