/*
   NUTRITIONAL BRUTALISM / LAB PROTOCOL
   Theme: Analytical, transparent, no-nonsense nutrition science.
   Avoids cliches: no green leaves, no smooth gradients, no rounded buttons.
*/

@font-face {
  font-family: 'Space Grotesk';
  src: url('../fonts/space-grotesk-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Space Grotesk';
  src: url('../fonts/space-grotesk-700.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Chivo';
  src: url('../fonts/chivo-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Chivo';
  src: url('../fonts/chivo-700.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Space Mono';
  src: url('../fonts/space-mono-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Space Mono';
  src: url('../fonts/space-mono-700.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  /* Colors - High contrast lab aesthetic */
  --c-bg: #F4F4F0; /* Off-white blueprint paper */
  --c-text: #111111; /* Carbon black */
  --c-accent: #FF5A00; /* Safety Orange for CTAs and critical data */
  --c-border: #333333; /* Structural Grey */
  --c-muted: #666666;
  --c-white: #FFFFFF;
  --c-bg-alt: #E8E8E4;

  /* Typography */
  --f-display: 'Space Grotesk', sans-serif;
  --f-body: 'Chivo', sans-serif;
  --f-mono: 'Space Mono', monospace;

  /* Layout */
  --container: 1200px;
  --sp-xs: 0.5rem;
  --sp-sm: 1rem;
  --sp-md: 2rem;
  --sp-lg: 4rem;
  --sp-xl: 8rem;

  /* Borders */
  --b-thin: 1px solid var(--c-border);
  --b-thick: 3px solid var(--c-text);
}

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

body, h1, h2, h3, h4, p, figure, blockquote, dl, dd, ul, ol {
  margin: 0;
  padding: 0;
}

ul, ol {
  list-style: none; /* Removing roles in HTML, relying on pure structural reset */
}

body {
  min-height: 100vh;
  text-rendering: optimizeSpeed;
  line-height: 1.5;
  font-family: var(--f-body);
  background-color: var(--c-bg);
  color: var(--c-text);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

a:hover {
  color: var(--c-accent);
  text-decoration-thickness: 2px;
}

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

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--f-display);
  font-weight: 700;
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 5rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
}

p {
  font-size: 1.125rem;
  margin-bottom: var(--sp-md);
  max-width: 65ch;
}

.mono {
  font-family: var(--f-mono);
  font-size: 0.9em;
}

/* Layout */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-sm);
}

.grid {
  display: grid;
  gap: var(--sp-md);
}

.flex {
  display: flex;
  gap: var(--sp-md);
}

/* Header & Nav */
.site-header {
  border-bottom: var(--b-thick);
  padding: var(--sp-sm) 0;
  background: var(--c-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: 1.5rem;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: -0.05em;
  display: flex;
  align-items: center;
  gap: var(--sp-xs);
}

.logo span {
  color: var(--c-accent);
}

.nav-links {
  display: flex;
  gap: var(--sp-md);
}

.nav-links a {
  text-decoration: none;
  font-family: var(--f-mono);
  font-weight: 700;
  font-size: 0.875rem;
  text-transform: uppercase;
}

.nav-links a[aria-current="page"] {
  color: var(--c-accent);
  border-bottom: 2px solid var(--c-accent);
}

/* Footer */
.site-footer {
  border-top: var(--b-thick);
  padding: var(--sp-lg) 0;
  margin-top: var(--sp-xl);
  background: var(--c-text);
  color: var(--c-bg);
}

.site-footer a {
  color: var(--c-bg);
}

.site-footer a:hover {
  color: var(--c-accent);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--sp-lg);
}

.footer-col h3 {
  font-size: 1.25rem;
  margin-bottom: var(--sp-sm);
  color: var(--c-accent);
}

.footer-col ul li {
  margin-bottom: var(--sp-xs);
  font-family: var(--f-mono);
  font-size: 0.875rem;
}

/* Forms & Tools */
.tool-box {
  border: var(--b-thick);
  padding: var(--sp-md);
  background: var(--c-white);
  margin-bottom: var(--sp-md);
}

.tool-box label {
  display: block;
  font-family: var(--f-mono);
  font-weight: 700;
  margin-bottom: var(--sp-xs);
  text-transform: uppercase;
  font-size: 0.875rem;
}

.tool-box input, .tool-box select {
  width: 100%;
  padding: var(--sp-sm);
  border: var(--b-thin);
  margin-bottom: var(--sp-sm);
  background: var(--c-bg);
  border-radius: 0;
}

.tool-box input:focus {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
}

.btn {
  display: inline-block;
  background: var(--c-text);
  color: var(--c-bg);
  padding: var(--sp-sm) var(--sp-md);
  font-family: var(--f-display);
  font-weight: 700;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn:hover {
  background: var(--c-accent);
  color: var(--c-text);
}

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

.btn.primary:hover {
  background: var(--c-text);
  color: var(--c-bg);
}

.result-box {
  margin-top: var(--sp-sm);
  padding: var(--sp-sm);
  background: var(--c-bg-alt);
  border-left: 4px solid var(--c-accent);
  font-family: var(--f-mono);
}

/* Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--sp-md);
  font-family: var(--f-mono);
  font-size: 0.875rem;
}

.data-table th, .data-table td {
  border: var(--b-thin);
  padding: var(--sp-sm);
  text-align: left;
}

.data-table th {
  background: var(--c-text);
  color: var(--c-bg);
  font-family: var(--f-display);
  text-transform: uppercase;
}

/* Utilities */
.text-accent { color: var(--c-accent); }
.bg-accent { background-color: var(--c-accent); }
.border-b { border-bottom: var(--b-thin); }
.pt-lg { padding-top: var(--sp-lg); }
.pb-lg { padding-bottom: var(--sp-lg); }
.mb-lg { margin-bottom: var(--sp-lg); }

/* Home Section Layouts */
.hero-asymmetric {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--sp-md);
  padding: var(--sp-xl) 0;
  border-bottom: var(--b-thick);
}

.hero-asymmetric h1 {
  grid-column: 1 / -1;
  margin-bottom: var(--sp-md);
}

.hero-stat {
  background: var(--c-text);
  color: var(--c-bg);
  padding: var(--sp-md);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-stat .big-num {
  font-size: 4rem;
  font-family: var(--f-display);
  color: var(--c-accent);
  line-height: 1;
}

@media (max-width: 768px) {
  .hero-asymmetric {
    grid-template-columns: 1fr;
  }
}