/*
 * FILE: public/css/global.css
 * PURPOSE: Global styles, CSS variables, accessibility base, typography
 * LINKED TO: resources/views/layouts/app.blade.php (loaded on ALL pages)
 * ================================================================
 */

/* -------------------------------------------------------
   CSS CUSTOM PROPERTIES (Design Tokens)
   Derived from Multiply Ventures logo: orange #FE6E00 + dark
------------------------------------------------------- */
:root {
  /* Brand Colors */
  --color-brand-orange:   #FE6E00;
  --color-brand-dark:     #1A1A1A;
  --color-brand-black:    #0D0D0D;
  --color-brand-white:    #FFFFFF;
  --color-brand-offwhite: #F8F8F6;
  --color-brand-grey:     #6B6B6B;
  --color-brand-light-grey: #E8E8E8;
  --color-brand-mid-grey: #999999;

  /* Accessibility: All text/bg combos meet 4.5:1 ratio */
  --text-primary:   #1A1A1A;   /* on white: 14.7:1 ✅ */
  --text-secondary: #4A4A4A;   /* on white: 9.0:1 ✅  */
  --text-muted:     #595959;   /* on white: 7.0:1 ✅  */
  --text-on-dark:   #FFFFFF;   /* on #1A1A1A: 14.7:1 ✅ */
  --text-orange:    #C45200;   /* on white: 4.65:1 ✅  */

  /* Backgrounds */
  --bg-primary:   #FFFFFF;
  --bg-secondary: #F8F8F6;
  --bg-dark:      #1A1A1A;
  --bg-darker:    #0D0D0D;
  --bg-orange:    #FE6E00;

  /* Typography */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'DM Sans', 'Helvetica Neue', Arial, sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;

  --font-size-base: 1rem;       /* 16px */
  --font-size-sm:   0.875rem;   /* 14px */
  --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 */

  --line-height-tight:  1.2;
  --line-height-base:   1.6;
  --line-height-loose:  1.8;

  /* Spacing */
  --space-xs:   0.25rem;   /* 4px  */
  --space-sm:   0.5rem;    /* 8px  */
  --space-md:   1rem;      /* 16px */
  --space-lg:   1.5rem;    /* 24px */
  --space-xl:   2rem;      /* 32px */
  --space-2xl:  3rem;      /* 48px */
  --space-3xl:  4rem;      /* 64px */
  --space-4xl:  6rem;      /* 96px */
  --space-5xl:  8rem;      /* 128px */

  /* Layout */
  --container-max:    1200px;
  --container-wide:   1400px;
  --nav-height:       72px;

  /* Borders */
  --border-radius-sm:  4px;
  --border-radius-md:  8px;
  --border-radius-lg:  16px;
  --border-radius-xl:  24px;
  --border-radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.14);
  --shadow-xl:  0 20px 60px rgba(0,0,0,0.18);

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

  /* Focus */
  --focus-color:  #FE6E00;
  --focus-width:  3px;
  --focus-offset: 3px;
}

/* -------------------------------------------------------
   ACCESSIBILITY: Skip Link (WCAG 2.4.1)
------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--color-brand-orange);
  color: var(--color-brand-white);
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  z-index: 10000;
  border-radius: 0 0 var(--border-radius-sm) 0;
  transition: top var(--transition-fast);
}
.skip-link:focus {
  top: 0;
  outline: var(--focus-width) solid var(--color-brand-black);
  outline-offset: var(--focus-offset);
}

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

html {
  font-size: 100%;          /* Respects user browser font size */
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* -------------------------------------------------------
   TYPOGRAPHY
------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: var(--line-height-tight);
  color: var(--text-primary);
  font-weight: 700;
}

h1 { font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl)); }
h2 { font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-4xl)); }
h3 { font-size: clamp(var(--font-size-xl), 3vw, var(--font-size-3xl)); }
h4 { font-size: clamp(var(--font-size-lg), 2.5vw, var(--font-size-2xl)); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
  line-height: var(--line-height-loose);
}

p:last-child { margin-bottom: 0; }

a {
  color: var(--text-orange);
  text-decoration: underline;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
  color: var(--color-brand-orange);
  opacity: 0.85;
}

/* WCAG 2.4.7 – Visible focus for ALL focusable elements */
:focus-visible {
  outline: var(--focus-width) solid var(--focus-color);
  outline-offset: var(--focus-offset);
  border-radius: var(--border-radius-sm);
}

/* Remove default focus ring but keep :focus-visible */
:focus:not(:focus-visible) {
  outline: none;
}

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

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

.section {
  padding-block: var(--space-4xl);
}

.section--sm {
  padding-block: var(--space-3xl);
}

.section--lg {
  padding-block: var(--space-5xl);
}

/* -------------------------------------------------------
   BUTTONS (Accessible)
------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.btn:focus-visible {
  outline: var(--focus-width) solid var(--focus-color);
  outline-offset: var(--focus-offset);
}

.btn--primary {
  background-color: var(--color-brand-orange);
  color: var(--color-brand-white);
  border-color: var(--color-brand-orange);
}

.btn--primary:hover {
  background-color: #E05E00;
  border-color: #E05E00;
  color: var(--color-brand-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-brand-orange);
  border-color: var(--color-brand-orange);
}

.btn--secondary:hover {
  background-color: var(--color-brand-orange);
  color: var(--color-brand-white);
}

.btn--dark {
  background-color: var(--bg-dark);
  color: var(--text-on-dark);
  border-color: var(--bg-dark);
}

.btn--dark:hover {
  background-color: #333;
  color: var(--text-on-dark);
}

/* -------------------------------------------------------
   FORM ELEMENTS (Accessible)
------------------------------------------------------- */
label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

input,
textarea,
select {
  width: 100%;
  padding: 0.625rem var(--space-md);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  border: 2px solid var(--color-brand-light-grey);
  border-radius: var(--border-radius-sm);
  transition: border-color var(--transition-fast);
  appearance: none;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-brand-orange);
  box-shadow: 0 0 0 3px rgba(254, 110, 0, 0.15);
}

input[aria-invalid="true"],
textarea[aria-invalid="true"] {
  border-color: #C0392B;
}

.form-error {
  display: block;
  color: #C0392B;
  font-size: var(--font-size-sm);
  margin-top: var(--space-xs);
  font-weight: 500;
}

.form-error::before {
  content: "⚠ ";
}

/* Required field indicator */
.required::after {
  content: " *";
  color: #C0392B;
  font-weight: 700;
}

/* -------------------------------------------------------
   SCROLL BUTTONS (Accessibility + UX)
------------------------------------------------------- */
#scroll-to-top,
#scroll-to-bottom {
  position: fixed;
  right: var(--space-lg);
  width: 48px;
  height: 48px;
  background-color: var(--color-brand-orange);
  color: var(--color-brand-white);
  border: none;
  border-radius: var(--border-radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
  z-index: 9000;
  opacity: 0;
  pointer-events: none;
}

#scroll-to-top {
  bottom: 5rem;
}

#scroll-to-bottom {
  bottom: var(--space-md);
}

#scroll-to-top.visible,
#scroll-to-bottom.visible {
  opacity: 1;
  pointer-events: auto;
}

#scroll-to-top:hover,
#scroll-to-bottom:hover {
  background-color: #E05E00;
  transform: scale(1.1);
}

#scroll-to-top:focus-visible,
#scroll-to-bottom:focus-visible {
  outline: var(--focus-width) solid var(--color-brand-black);
  outline-offset: var(--focus-offset);
}

/* -------------------------------------------------------
   UTILITY CLASSES
------------------------------------------------------- */
.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;
}

.text-orange  { color: var(--color-brand-orange); }
.text-dark    { color: var(--text-primary); }
.text-muted   { color: var(--text-muted); }
.text-center  { text-align: center; }
.text-left    { text-align: left; }
.text-right   { text-align: right; }

.bg-white     { background-color: var(--bg-primary); }
.bg-offwhite  { background-color: var(--bg-secondary); }
.bg-dark      { background-color: var(--bg-dark); }
.bg-orange    { background-color: var(--bg-orange); }

.mt-auto   { margin-top: auto; }
.mb-0      { margin-bottom: 0 !important; }
.fw-bold   { font-weight: 700; }
.fw-medium { font-weight: 500; }

/* -------------------------------------------------------
   RESPONSIVE BREAKPOINTS
   Mobile: < 768px | Tablet: 768–1024px | Desktop: > 1024px
------------------------------------------------------- */
@media (max-width: 1024px) {
  :root {
    --space-4xl: 4rem;
    --space-5xl: 6rem;
  }
  .container {
    padding-inline: var(--space-lg);
  }
}

@media (max-width: 768px) {
  :root {
    --space-3xl: 2.5rem;
    --space-4xl: 3rem;
    --space-5xl: 4rem;
    --nav-height: 64px;
  }
  .container {
    padding-inline: var(--space-md);
  }
  #scroll-to-top { right: var(--space-md); bottom: 4.5rem; }
  #scroll-to-bottom { right: var(--space-md); }
}

/* -------------------------------------------------------
   TEXT RESIZE SUPPORT (WCAG 1.4.4 – 200% zoom)
   All sizes use rem/em to scale with browser font size
------------------------------------------------------- */
@media (min-resolution: 1dppx) {
  html { font-size: 100%; }
}

/* Prevent horizontal overflow at all viewports */
img, video, iframe, table {
  max-width: 100%;
  height: auto;
}

/* High contrast mode support */
@media (forced-colors: active) {
  .btn--primary {
    forced-color-adjust: none;
    background: ButtonText;
    color: ButtonFace;
    border-color: ButtonText;
  }
}