/* ==========================================================================
   Branch Consulting — Shared Design System
   --------------------------------------------------------------------------
   Single foundation stylesheet linked by every page and webshop step.
   All palette, type, spacing, radius and shadow tokens live here as CSS
   custom properties so downstream pages never redefine them.
   Also ships the reusable CHROME component classes (.site-header, .site-nav,
   .site-footer) and core UI components (.container, .btn, .card, grids).
   Mobile-first: base styles target small screens, min-width queries enhance.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Fonts — self-hosted Satoshi with local fallbacks
   -------------------------------------------------------------------------- */
@font-face {
  font-family: "Satoshi";
  src: url("assets/fonts/Satoshi-Light.woff2") format("woff2"),
       url("assets/fonts/Satoshi-Light.woff") format("woff");
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Satoshi";
  src: url("assets/fonts/Satoshi-Regular.woff2") format("woff2"),
       url("assets/fonts/Satoshi-Regular.woff") format("woff");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Satoshi";
  src: url("assets/fonts/Satoshi-Medium.woff2") format("woff2"),
       url("assets/fonts/Satoshi-Medium.woff") format("woff");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Satoshi";
  src: url("assets/fonts/Satoshi-Bold.woff2") format("woff2"),
       url("assets/fonts/Satoshi-Bold.woff") format("woff");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* --------------------------------------------------------------------------
   2. Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Brand palette */
  --color-ink: #1c1c21;          /* primary text, dark surfaces, menu panel */
  --color-ink-soft: #474751;     /* secondary text, dividers, accents */
  --color-gray: #6f6f81;         /* body copy on light sections */
  --color-muted: #b8b8c3;        /* inactive nav, headings, borders */
  --color-surface: #f5f5f9;      /* tinted light section background */
  --color-white: #ffffff;
  --color-accent: #ffc403;       /* brand yellow — tags, highlights, CTA */
  --color-accent-strong: #e6ae00;/* yellow hover / pressed */
  --color-footer: #33318d;       /* indigo footer surface */
  --color-footer-deep: #272564;
  --color-overlay: rgba(0, 0, 0, 0.3);      /* hero video tint */
  --color-overlay-strong: rgba(0, 0, 0, 0.55);

  /* Semantic aliases */
  --color-primary: var(--color-accent);
  --color-secondary: var(--color-footer);
  --color-background: var(--color-white);
  --color-background-light: var(--color-surface);
  --color-text: var(--color-ink);
  --color-text-muted: var(--color-gray);
  --color-border: rgba(28, 28, 33, 0.12);
  --color-border-strong: rgba(28, 28, 33, 0.24);
  --color-border-invert: rgba(255, 255, 255, 0.24);

  /* Typography */
  --font-family-base: "Satoshi", Tahoma, Geneva, Verdana, sans-serif;
  --font-family-display: var(--font-family-base);
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;
  --line-height-tight: 1.1;
  --line-height-snug: 1.3;
  --line-height-normal: 1.6;
  --letter-spacing-tag: 2px;
  --letter-spacing-tight: -0.02em;

  /* Fluid type scale */
  --font-size-xs: 0.75rem;                                   /* 12px */
  --font-size-sm: 0.875rem;                                  /* 14px */
  --font-size-base: 1rem;                                    /* 16px */
  --font-size-md: 1.125rem;                                  /* 18px */
  --font-size-lg: 1.25rem;                                   /* 20px */
  --font-size-xl: 1.5rem;                                    /* 24px */
  --font-size-h4: clamp(1.125rem, 0.9rem + 0.8vw, 1.25rem);  /* 18→20px */
  --font-size-h3: clamp(1.25rem, 1rem + 1vw, 1.5rem);        /* 20→24px */
  --font-size-h2: clamp(1.75rem, 1.3rem + 1.6vw, 2rem);      /* 28→32px */
  --font-size-h1: clamp(2.0625rem, 1.2rem + 4vw, 4.5rem);    /* 33→72px */

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 2.5rem;
  --space-8: 3rem;
  --space-9: 4rem;
  --space-10: 5rem;
  --space-11: 6rem;
  --space-12: 7.5rem;
  --space-section: clamp(2.5rem, 1.5rem + 5vw, 7.5rem); /* 40→120px */
  --space-around: 10px;                                  /* block gutter */
  --space-gutter: clamp(1rem, 0.5rem + 2vw, 2rem);       /* 16→32px */

  /* Layout */
  --max-page-width: 1216px;
  --max-page-width-wide: 1680px;
  --header-height: 110px;

  /* Radius */
  --radius-sm: 8px;
  --radius: 12px;         /* buttons */
  --radius-lg: 20px;      /* sections */
  --radius-footer: 15px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(28, 28, 33, 0.06);
  --shadow-md: 0 12px 30px rgba(28, 28, 33, 0.1);
  --shadow-lg: 0 24px 60px rgba(28, 28, 33, 0.16);
  --shadow-glow: 0 0 0 4px rgba(255, 196, 3, 0.45);

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-fast: 160ms;
  --duration: 300ms;
  --duration-slow: 1000ms;

  /* Z-index */
  --z-header: 300;
  --z-nav: 200;
}

/* --------------------------------------------------------------------------
   3. Reset / base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   4. Typography
   -------------------------------------------------------------------------- */
h1,
.h1 {
  font-family: var(--font-family-display);
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

h2,
.h2 {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

h3,
.h3 {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-snug);
}

h4,
.h4 {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-snug);
}

.lead {
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  color: var(--color-text-muted);
}

.text-small {
  font-size: var(--font-size-sm);
}

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

/* Yellow uppercase micro-label that anchors every section */
.section-tag,
.eyebrow {
  display: inline-block;
  margin-bottom: var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tag);
  text-transform: uppercase;
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   5. Layout helpers
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-page-width);
  margin-inline: auto;
  padding-inline: var(--space-gutter);
}

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

.section {
  padding-block: var(--space-section);
}

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

.section--ink {
  background-color: var(--color-ink);
  color: var(--color-white);
}

.section--ink .section-tag {
  color: var(--color-accent);
}

/* Rounded full-width block with the page gutter around it */
.panel {
  border-radius: var(--radius-lg);
  margin: var(--space-around);
  padding: var(--space-section) 0;
  overflow: hidden;
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.grid--gap-sm {
  gap: var(--space-4);
}

.flex {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
}

.flex--between {
  justify-content: space-between;
}

.flex--column {
  flex-direction: column;
  align-items: flex-start;
}

.stack > * + * {
  margin-top: var(--space-4);
}

/* --------------------------------------------------------------------------
   6. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  line-height: 1;
  text-align: center;
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
}

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

.btn:focus-visible {
  outline: none;
  box-shadow: var(--shadow-glow);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-ink);
}

.btn-primary:hover {
  background-color: var(--color-accent-strong);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-ink);
  border-color: var(--color-border-strong);
}

.btn-secondary:hover {
  border-color: var(--color-ink);
  background-color: rgba(28, 28, 33, 0.05);
}

.btn-light {
  background-color: var(--color-white);
  color: var(--color-ink);
}

.btn-light:hover {
  background-color: var(--color-surface);
}

.btn-ghost-light {
  background-color: rgba(255, 255, 255, 0.12);
  color: var(--color-white);
  border-color: var(--color-border-invert);
  backdrop-filter: blur(6px);
}

.btn-ghost-light:hover {
  background-color: rgba(255, 255, 255, 0.22);
}

.btn-block {
  width: 100%;
}

/* --------------------------------------------------------------------------
   7. Cards & content components
   -------------------------------------------------------------------------- */
.card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--duration) var(--ease-out),
              transform var(--duration) var(--ease-out);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card__icon {
  width: 24px;
  height: 24px;
}

.card--flat {
  box-shadow: none;
  border-color: transparent;
  background-color: transparent;
  padding: 0;
}

.card--flat:hover {
  transform: none;
  box-shadow: none;
}

/* Grayscale client logo grid */
.logo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
  gap: var(--space-3);
  opacity: 0.5;
}

.logo-grid img {
  width: 100%;
  max-width: 230px;
  margin-inline: auto;
  filter: grayscale(100%);
}

/* --------------------------------------------------------------------------
   8. Chrome — header, nav and mobile toggle
   -------------------------------------------------------------------------- */
.site-header {
  position: absolute;
  top: 0;
  left: 0;
  z-index: var(--z-header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: var(--header-height);
  padding-inline: var(--space-gutter);
  color: var(--color-white);
}

.site-header--solid {
  position: sticky;
  top: 0;
  background-color: var(--color-white);
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-border);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tight);
  color: currentColor;
}

.site-brand__mark {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background-color: var(--color-accent);
}

/* Trigger: visible on small screens, hidden once the inline nav appears */
.nav-toggle {
  position: relative;
  z-index: calc(var(--z-nav) + 1);
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  background: none;
  border: 0;
  color: currentColor;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tag);
  text-transform: uppercase;
  cursor: pointer;
}

.nav-toggle__icon {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
  width: 24px;
}

.nav-toggle__bar {
  display: block;
  height: 2px;
  width: 100%;
  background-color: currentColor;
  transition: transform var(--duration) var(--ease-out),
              opacity var(--duration) var(--ease-out);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

/* Full-screen overlay menu on mobile, inline row on desktop */
.site-nav {
  position: fixed;
  inset: 0;
  z-index: var(--z-nav);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-6);
  padding: calc(var(--header-height) + var(--space-6)) var(--space-gutter) var(--space-9);
  overflow-y: auto;
  background-color: var(--color-ink);
  color: var(--color-white);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-1rem);
  transition: opacity var(--duration) var(--ease-out),
              transform var(--duration) var(--ease-out),
              visibility var(--duration) var(--ease-out);
}

.site-nav.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.site-nav__link {
  font-size: 1.875rem;
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-muted);
  transition: color var(--duration-fast) var(--ease-out);
}

.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
  color: var(--color-white);
}

.site-nav__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   9. Chrome — footer
   -------------------------------------------------------------------------- */
.site-footer {
  margin: var(--space-around);
  padding: var(--space-9) var(--space-6) var(--space-6);
  background-color: var(--color-footer);
  color: var(--color-white);
  border-radius: var(--radius-footer);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-7);
}

.footer-brand {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
}

.footer-heading {
  margin-bottom: var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tag);
  text-transform: uppercase;
  color: var(--color-muted);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-link {
  color: var(--color-white);
  transition: color var(--duration-fast) var(--ease-out);
}

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

.footer-contact {
  font-style: normal;
  line-height: var(--line-height-normal);
  color: var(--color-white);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border-invert);
  font-size: var(--font-size-sm);
  color: var(--color-muted);
}

.footer-social {
  display: flex;
  gap: var(--space-4);
}

/* --------------------------------------------------------------------------
   10. Utilities
   -------------------------------------------------------------------------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

/* --------------------------------------------------------------------------
   11. Responsive enhancements (mobile-first min-width queries)
   -------------------------------------------------------------------------- */
@media (min-width: 640px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .logo-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-bottom {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 900px) {
  .grid--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .grid--4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .logo-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .site-nav {
    position: static;
    inset: auto;
    overflow: visible;
    padding: 0;
    flex-direction: row;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-6);
    background-color: transparent;
    color: inherit;
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .site-nav__list {
    flex-direction: row;
    gap: var(--space-5);
  }

  .site-nav__link {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-muted);
  }

  .site-nav__link:hover,
  .site-nav__link[aria-current="page"] {
    color: currentColor;
  }

  .site-nav__meta {
    flex-direction: row;
    gap: var(--space-4);
  }

  .nav-toggle {
    display: none;
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
  }
}

@media (min-width: 1920px) {
  .container {
    max-width: var(--max-page-width-wide);
  }
}

/* --------------------------------------------------------------------------
   12. Motion preferences
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}