/* CSS variables and tokens from DESIGN.md */
:root {
  --color-bg-body: #ebd9c8;        /* Textured recycled paper body background */
  --color-bg-card: #fdfaf2;        /* Off-white paper container background */
  --color-primary: #607d8b;        /* Slate-blue cardboard layer */
  --color-secondary: #ff9800;      /* Dull orange cardboard accent / buttons */
  --color-accent-light: #d7ccc8;   /* Light beige cardboard layer */
  
  --color-text-dark: #263238;      /* Deep slate-charcoal for text and borders */
  --color-text-light: #fdfaf2;     /* Light text for dark containers */
  --color-border: #263238;         /* Solid outlines for containers */
  
  --font-headings: 'VT323', monospace;
  --font-body: 'Roboto Mono', monospace;

  --shadow-cardboard: 6px 6px 0px var(--color-border);
  --shadow-cardboard-hover: 2px 2px 0px var(--color-border);
  --shadow-cardboard-active: 0px 0px 0px var(--color-border);
}

/* Reset and base styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  color: var(--color-text-dark);
  background-color: var(--color-bg-body);
  /* Textured paper texture grid */
  background-image: 
    repeating-linear-gradient(45deg, rgba(38, 50, 56, 0.02) 0px, rgba(38, 50, 56, 0.02) 2px, transparent 2px, transparent 10px),
    repeating-linear-gradient(-45deg, rgba(38, 50, 56, 0.02) 0px, rgba(38, 50, 56, 0.02) 2px, transparent 2px, transparent 10px);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Helpers */
.flex-row {
  display: flex;
  flex-direction: row;
}

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

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

/* Compliance Above Fold Banner */
.compliance-banner {
  background-color: #ffb74d;
  color: var(--color-text-dark);
  border-bottom: 3px solid var(--color-border);
  font-size: 0.85rem;
  padding: 0.5rem 0;
  font-weight: bold;
}

.compliance-banner .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.banner-link {
  color: var(--color-text-dark);
  text-decoration: underline;
}

/* Header & Branding */
.main-header {
  background-color: var(--color-primary);
  border-bottom: 4px solid var(--color-border);
  padding: 1rem 0;
  box-shadow: 0 4px 0px rgba(38, 50, 56, 0.1);
}

.main-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--color-text-light);
  gap: 0.75rem;
}

.logo-box {
  background-color: var(--color-secondary);
  color: var(--color-text-dark);
  font-family: var(--font-headings);
  font-size: 1.8rem;
  font-weight: bold;
  padding: 0.2rem 0.6rem;
  border: 3px solid var(--color-border);
  box-shadow: 3px 3px 0 var(--color-border);
  transform: rotate(-3deg);
}

.brand-name {
  font-family: var(--font-headings);
  font-size: 2.2rem;
  text-shadow: 2px 2px 0px var(--color-border);
  letter-spacing: 1px;
}

/* Main Navigation */
.main-nav ul {
  list-style: none;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.nav-link {
  font-family: var(--font-headings);
  font-size: 1.35rem;
  color: var(--color-text-light);
  text-decoration: none;
  background-color: rgba(38, 50, 56, 0.2);
  padding: 0.4rem 0.8rem;
  border: 2px solid transparent;
  transition: all 0.15s ease;
}

.nav-link:hover {
  background-color: var(--color-secondary);
  color: var(--color-text-dark);
  border: 2px solid var(--color-border);
  box-shadow: 3px 3px 0 var(--color-border);
  transform: translate(-3px, -3px);
}

.nav-link.active {
  background-color: var(--color-bg-card);
  color: var(--color-text-dark);
  border: 2px solid var(--color-border);
  box-shadow: 3px 3px 0 var(--color-border);
}

/* Main Layout & Stacked Paper Grid */
.page-content-wrapper {
  flex-grow: 1;
  padding: 3rem 0;
}

/* Layout container styling like a stacked sheet of paper */
.paper-stack {
  background-color: var(--color-bg-card);
  border: 3px solid var(--color-border);
  padding: 3rem;
  position: relative;
  /* Thick paper stack style shadow effect */
  box-shadow: 
    6px 6px 0px var(--color-border),
    12px 12px 0px var(--color-accent-light),
    18px 18px 0px var(--color-border);
  margin-bottom: 2rem;
}

/* Typography styles */
h1, h2, h3, h4 {
  font-family: var(--font-headings);
  color: var(--color-text-dark);
  margin-bottom: 1rem;
  line-height: 1.1;
}

h1 {
  font-size: 3rem;
  border-bottom: 4px dashed var(--color-border);
  padding-bottom: 0.75rem;
  margin-bottom: 2rem;
  text-transform: uppercase;
}

h2 {
  font-size: 2.2rem;
  margin-top: 2rem;
  background-color: var(--color-accent-light);
  padding: 0.3rem 0.8rem;
  display: inline-block;
  border: 2px solid var(--color-border);
  box-shadow: 3px 3px 0 var(--color-border);
  transform: rotate(-1deg);
}

h3 {
  font-size: 1.6rem;
  margin-top: 1.5rem;
}

p {
  margin-bottom: 1.25rem;
}

a {
  color: #d84315; /* Rust/orange contrast for links */
  text-decoration: underline;
  font-weight: bold;
}

a:hover {
  color: var(--color-secondary);
}

/* BLUF Box (Bottom Line Up Front) / Definition block */
.bluf-box {
  background-color: var(--color-accent-light);
  border: 3px solid var(--color-border);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-cardboard);
  position: relative;
}

.bluf-box::before {
  content: "BLUF: KEY SUMMARY";
  position: absolute;
  top: -14px;
  left: 15px;
  background-color: var(--color-secondary);
  color: var(--color-text-dark);
  font-family: var(--font-headings);
  font-size: 1.1rem;
  padding: 0.1rem 0.6rem;
  border: 2px solid var(--color-border);
  font-weight: bold;
}

/* Standard Alert boxes (GitHub style) */
.alert-note, .alert-tip, .alert-important, .alert-warning {
  padding: 1.25rem;
  margin: 1.5rem 0;
  border: 3px solid var(--color-border);
  box-shadow: var(--shadow-cardboard);
}

.alert-note { background-color: #e0f2f1; }
.alert-tip { background-color: #f1f8e9; }
.alert-important { background-color: #e8eaf6; }
.alert-warning { background-color: #fff3e0; }

.alert-title {
  font-family: var(--font-headings);
  font-size: 1.4rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

/* Geometric Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 2.5rem 0;
}

.card {
  background-color: var(--color-bg-card);
  border: 3px solid var(--color-border);
  padding: 1.5rem;
  box-shadow: var(--shadow-cardboard);
  transition: all 0.15s ease;
}

.card:hover {
  transform: translate(3px, 3px);
  box-shadow: var(--shadow-cardboard-hover);
}

.card-title {
  font-family: var(--font-headings);
  font-size: 1.8rem;
  margin-bottom: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-block;
  font-family: var(--font-headings);
  font-size: 1.5rem;
  padding: 0.5rem 1.5rem;
  background-color: var(--color-secondary);
  color: var(--color-text-dark);
  border: 3px solid var(--color-border);
  box-shadow: var(--shadow-cardboard);
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.1s ease, box-shadow 0.1s ease;
  text-align: center;
}

.btn:hover {
  transform: translate(3px, 3px);
  box-shadow: var(--shadow-cardboard-hover);
  color: var(--color-text-dark);
}

.btn:active {
  transform: translate(5px, 5px);
  box-shadow: var(--shadow-cardboard-active);
}

.btn-large {
  font-size: 1.8rem;
  padding: 0.75rem 2rem;
  display: block;
  margin: 2rem 0;
  max-width: 400px;
}

/* Images & Media */
.content-image-wrapper {
  margin: 2.5rem 0;
  border: 3px solid var(--color-border);
  box-shadow: var(--shadow-cardboard);
  overflow: hidden;
  background-color: var(--color-accent-light);
}

.content-image {
  width: 100%;
  height: auto;
  display: block;
}

.content-image-caption {
  background-color: var(--color-primary);
  color: var(--color-text-light);
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  text-align: center;
  border-top: 3px solid var(--color-border);
}

/* Author Box / Byline */
.author-byline {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1.5rem 0 2rem 0;
  padding: 0.75rem 1.25rem;
  border-left: 5px solid var(--color-secondary);
  background-color: var(--color-accent-light);
  font-size: 0.9rem;
}

.author-byline strong {
  color: var(--color-text-dark);
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.9rem;
}

th, td {
  border: 3px solid var(--color-border);
  padding: 0.75rem 1rem;
  text-align: left;
}

th {
  background-color: var(--color-primary);
  color: var(--color-text-light);
  font-family: var(--font-headings);
  font-size: 1.3rem;
  text-transform: uppercase;
}

tr:nth-child(even) {
  background-color: rgba(38, 50, 56, 0.05);
}

/* Form Styles */
.form-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  font-weight: bold;
  margin-bottom: 0.5rem;
}

input, textarea, select {
  width: 100%;
  padding: 0.75rem;
  font-family: var(--font-body);
  font-size: 1rem;
  border: 3px solid var(--color-border);
  background-color: var(--color-bg-card);
  box-shadow: 3px 3px 0 var(--color-border);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  box-shadow: 4px 4px 0 var(--color-secondary);
}

/* FAQ Accordion or List */
.faq-list {
  margin: 2.5rem 0;
}

.faq-item {
  border: 3px solid var(--color-border);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-cardboard);
  background-color: var(--color-bg-card);
}

.faq-question {
  background-color: var(--color-primary);
  color: var(--color-text-light);
  padding: 1rem;
  font-family: var(--font-headings);
  font-size: 1.5rem;
  border-bottom: 3px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.faq-answer {
  padding: 1.25rem;
}

/* Footer layout */
.main-footer {
  background-color: var(--color-primary);
  color: var(--color-text-light);
  border-top: 4px solid var(--color-border);
  padding: 4rem 0 2rem 0;
  margin-top: auto;
  font-size: 0.9rem;
}

.main-footer a {
  color: var(--color-secondary);
  text-decoration: none;
}

.main-footer a:hover {
  text-decoration: underline;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-grid h3 {
  color: var(--color-text-light);
  border-bottom: 2px dashed var(--color-secondary);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
}

.footer-grid ul {
  list-style: none;
}

.footer-grid li {
  margin-bottom: 0.75rem;
}

.footer-disclaimers {
  border-top: 3px solid var(--color-border);
  padding-top: 2rem;
  margin-bottom: 2rem;
  font-size: 0.8rem;
  line-height: 1.7;
  color: #e0f2f1;
}

.footer-disclaimers p {
  margin-bottom: 1rem;
}

.footer-bottom {
  text-align: center;
  border-top: 1px solid rgba(253, 250, 242, 0.2);
  padding-top: 1.5rem;
  font-size: 0.8rem;
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .main-header .container {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .main-nav ul {
    gap: 0.5rem;
  }
}

@media (max-width: 600px) {
  h1 {
    font-size: 2.2rem;
  }
  h2 {
    font-size: 1.8rem;
  }
  .paper-stack {
    padding: 1.5rem;
    box-shadow: 4px 4px 0px var(--color-border), 8px 8px 0px var(--color-accent-light);
  }
}