/* =============================================
   RETAIL SIGNAL — BASE STYLESHEET
   Brand: Deep Navy + Electric Teal + Warm White
   ============================================= */

/* ---------- DESIGN TOKENS ---------- */
:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem + 2.5vw, 3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem + 4vw, 5rem);
  --text-hero: clamp(3rem,     0.5rem + 7vw, 8rem);

  /* 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;

  /* Retail Signal Color Palette — Light */
  --color-bg:              #F5F7FA;
  --color-surface:         #FFFFFF;
  --color-surface-2:       #F0F4F8;
  --color-surface-offset:  #E8EDF4;
  --color-divider:         #D0D9E8;
  --color-border:          #C2CDE0;

  /* Text */
  --color-text:         #0A1628;
  --color-text-muted:   #4A5978;
  --color-text-faint:   #8A9AB8;
  --color-text-inverse: #F5F7FA;

  /* Primary Accent — Electric Teal */
  --color-primary:           #00B8A3;
  --color-primary-hover:     #009688;
  --color-primary-active:    #00796B;
  --color-primary-highlight: #CCF0EC;

  /* Navy — used for dark sections */
  --color-navy:        #0A1628;
  --color-navy-light:  #112040;
  --color-navy-medium: #1A3060;

  /* Secondary warm accent */
  --color-accent:       #E8B84B;
  --color-accent-hover: #D4A030;

  /* Status */
  --color-success: #2E7D52;
  --color-error:   #C0392B;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(10, 22, 40, 0.08);
  --shadow-md: 0 4px 16px rgba(10, 22, 40, 0.12);
  --shadow-lg: 0 12px 40px rgba(10, 22, 40, 0.16);
  --shadow-xl: 0 24px 64px rgba(10, 22, 40, 0.20);

  /* Content widths */
  --content-narrow:  640px;
  --content-default: 980px;
  --content-wide:    1240px;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Inter', sans-serif;
  --font-body:    'Satoshi', 'Inter', sans-serif;
}

/* DARK MODE */
[data-theme='dark'] {
  --color-bg:              #080E1A;
  --color-surface:         #0D1726;
  --color-surface-2:       #111E30;
  --color-surface-offset:  #162438;
  --color-divider:         #1E3050;
  --color-border:          #243860;
  --color-text:            #E2E8F0;
  --color-text-muted:      #8A9AB8;
  --color-text-faint:      #4A5978;
  --color-text-inverse:    #0A1628;
  --color-primary:         #00D4BC;
  --color-primary-hover:   #00B8A3;
  --color-primary-active:  #009688;
  --color-primary-highlight: #0A2E28;
  --color-navy:            #E2E8F0;
  --color-navy-light:      #1A3060;
  --color-navy-medium:     #243880;
  --color-accent:          #F0C84E;
  --color-accent-hover:    #D4A030;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
  --shadow-xl: 0 24px 64px rgba(0,0,0,0.6);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:              #080E1A;
    --color-surface:         #0D1726;
    --color-surface-2:       #111E30;
    --color-surface-offset:  #162438;
    --color-divider:         #1E3050;
    --color-border:          #243860;
    --color-text:            #E2E8F0;
    --color-text-muted:      #8A9AB8;
    --color-text-faint:      #4A5978;
    --color-text-inverse:    #0A1628;
    --color-primary:         #00D4BC;
    --color-primary-hover:   #00B8A3;
    --color-primary-active:  #009688;
    --color-primary-highlight: #0A2E28;
    --color-accent:          #F0C84E;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
  }
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-20);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

ul[role='list'], ol[role='list'] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
  line-height: 1.15;
  font-family: var(--font-display);
}

p, li, figcaption {
  text-wrap: pretty;
  max-width: 72ch;
}

::selection {
  background: color-mix(in oklab, var(--color-primary) 25%, transparent);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

button { cursor: pointer; background: none; border: none; }
a { color: inherit; text-decoration: none; }

/* ---------- UTILITIES ---------- */
.container {
  width: 100%;
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-4), 5vw, var(--space-12));
}

.container--wide {
  max-width: var(--content-wide);
}

.container--narrow {
  max-width: var(--content-narrow);
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border-width: 0;
}

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: all var(--transition-interactive);
  cursor: pointer;
  border: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #0A1628;
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px color-mix(in oklab, var(--color-primary) 40%, transparent);
}

.btn--navy {
  background: var(--color-navy);
  color: #fff;
}
[data-theme='dark'] .btn--navy {
  background: var(--color-surface-offset);
  color: var(--color-text);
}
.btn--navy:hover {
  background: var(--color-navy-medium);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.btn--ghost:hover {
  background: var(--color-primary-highlight);
  transform: translateY(-1px);
}

.btn--ghost-white {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.5);
}
.btn--ghost-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
}

/* ---------- SECTION SPACING ---------- */
.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-32));
}

.section--tight {
  padding-block: clamp(var(--space-8), 5vw, var(--space-20));
}

/* ---------- TEXT STYLES ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.eyebrow::before {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-text);
  margin-top: var(--space-3);
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 56ch;
  line-height: 1.7;
}

/* ---------- CARDS ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-interactive);
}

.card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

/* ---------- DIVIDER ---------- */
.divider {
  width: 100%;
  height: 1px;
  background: var(--color-divider);
}

/* ---------- BADGE ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.badge--teal {
  background: var(--color-primary-highlight);
  color: var(--color-primary-active);
}
[data-theme='dark'] .badge--teal {
  background: color-mix(in oklab, var(--color-primary) 15%, transparent);
  color: var(--color-primary);
}

/* ---------- GRID HELPERS ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-3 { grid-template-columns: 1fr; }
}

/* ---------- HEADER ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in oklab, var(--color-bg) 90%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition-slow);
}
.header--scrolled { box-shadow: var(--shadow-sm); }

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: var(--space-8);
}

.header__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.header__logo svg { flex-shrink: 0; }
.header__logo-text {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}
.header__nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
  padding: var(--space-1) 0;
  position: relative;
}
.header__nav a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transition: width var(--transition-interactive);
}
.header__nav a:hover { color: var(--color-text); }
.header__nav a:hover::after { width: 100%; }
.header__nav a.active { color: var(--color-primary); }
.header__nav a.active::after { width: 100%; }

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: all var(--transition-interactive);
}
.theme-toggle:hover {
  background: var(--color-surface-offset);
  color: var(--color-text);
}

/* Mobile nav */
.hamburger {
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: background var(--transition-interactive);
}
.hamburger:hover { background: var(--color-surface-offset); }

.mobile-menu { display: none; }

@media (max-width: 768px) {
  .hamburger { display: flex; }
  .header__nav,
  .header__actions .btn { display: none; }
  .mobile-menu {
    position: fixed;
    inset: 68px 0 0 0;
    background: var(--color-bg);
    padding: var(--space-8) var(--space-6);
    z-index: 99;
    display: none;
    flex-direction: column;
    gap: var(--space-4);
    border-top: 1px solid var(--color-divider);
  }
  .mobile-menu.open { display: flex; }
  .mobile-menu a {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-text);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-divider);
    display: block;
  }
  .mobile-menu .btn {
    margin-top: var(--space-4);
    justify-content: center;
    display: inline-flex;
  }
}

/* ---------- FOOTER ---------- */
.footer {
  background: var(--color-navy);
  color: rgba(255,255,255,0.7);
  padding-block: var(--space-16) var(--space-8);
}
[data-theme='dark'] .footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
[data-theme='dark'] .footer__grid {
  border-bottom-color: var(--color-border);
}

@media (max-width: 900px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .footer__grid { grid-template-columns: 1fr; }
}

.footer__logo-text {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: var(--space-3);
  display: flex; align-items: center; gap: var(--space-3);
}
.footer__tagline {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
  line-height: 1.6;
  max-width: 32ch;
}
.footer__col-title {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: var(--space-4);
}
[data-theme='dark'] .footer__col-title { color: var(--color-text-faint); }
.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer__links a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  transition: color var(--transition-interactive);
}
[data-theme='dark'] .footer__links a { color: var(--color-text-muted); }
.footer__links a:hover { color: var(--color-primary); }
.footer__bottom {
  padding-top: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.4);
}
[data-theme='dark'] .footer__bottom { color: var(--color-text-faint); }