/*
================================================================================
ODICIUM CORPORATE WEBSITE DESIGN SYSTEM & CORE STYLES (INDEX.CSS)
================================================================================
Description: Unified design system tokens, CSS reset, layout utilities, and UI 
             component styles for the ODICIUM Website MVP.
Target Audience: Small and medium-sized businesses (SMBs) & Operations-intensive orgs.
Theme: Official ODICIUM Graphite + Orange + Slate Corporate Palette.
================================================================================
*/

/* -----------------------------------------------------------------------------
   0. FONT LOADING POLICY
   External font imports are intentionally omitted at this stage to avoid 
   external network dependencies. Approved external font loading may be 
   added later during final website optimization.
----------------------------------------------------------------------------- */

/* -----------------------------------------------------------------------------
   1. DESIGN TOKENS (ROOT VARIABLES)
----------------------------------------------------------------------------- */
:root {
  /* --- Color System --- */
  --color-bg-primary: #0f1115;
  /* Deep graphite-black background */
  --color-bg-secondary: #1F2937;
  /* Official ODICIUM Graphite - Section background */
  --color-bg-card: rgba(31, 41, 55, 0.7);
  /* Semi-transparent Graphite for Glassmorphism */

  --color-border-main: rgba(100, 116, 139, 0.3);
  /* Official ODICIUM Slate (Semi-transparent) */
  --color-border-hover: rgba(249, 115, 22, 0.4);
  /* Official ODICIUM Orange border hover */

  --color-accent-start: #F97316;
  /* Official ODICIUM Orange primary */
  --color-accent-end: #ea580c;
  /* Darker Orange for gradients/hovers */
  --color-accent-glow: rgba(249, 115, 22, 0.15);
  /* Orange accent box-shadow glow */

  --color-text-main: #FFFFFF;
  /* White - High contrast typography */
  --color-text-muted: #64748B;
  /* Official ODICIUM Slate - Supporting text & captions */
  --color-text-body: #F8FAFC;
  /* Light Gray - Readable body text */
  --color-text-dark: #1F2937;
  /* Official ODICIUM Graphite - Dark contrast text */

  /* --- Spacing Scale (Fluid spacing via clamp) --- */
  --space-xxs: 0.25rem;
  /* 4px */
  --space-xs: 0.5rem;
  /* 8px */
  --space-sm: clamp(0.75rem, 1.5vw, 1rem);
  /* 12px - 16px */
  --space-md: clamp(1.25rem, 2.5vw, 1.75rem);
  /* 20px - 28px */
  --space-lg: clamp(2rem, 4vw, 3rem);
  /* 32px - 48px */
  --space-xl: clamp(3rem, 6vw, 4.5rem);
  /* 48px - 72px */
  --space-xxl: clamp(4.5rem, 9vw, 6.75rem);
  /* 72px - 108px */

  /* --- Grid & Layout --- */
  --grid-max-width: 1200px;
  --border-radius-sm: 6px;
  --border-radius-md: 12px;
  --border-radius-lg: 20px;

  /* --- Transitions --- */
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease-out;

  /* --- Typography Scale (Fluid scale based on viewport) --- */
  --font-family-headers: "Outfit", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  --font-family-body: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;

  --font-size-h1: clamp(2.25rem, 5vw, 3.5rem);
  /* Hero headlines */
  --font-size-h2: clamp(1.75rem, 3.5vw, 2.5rem);
  /* Section headings */
  --font-size-h3: clamp(1.25rem, 2.5vw, 1.75rem);
  /* Card / Subsection titles */
  --font-size-body: clamp(0.95rem, 1.1vw, 1.05rem);
  /* Reading body text */
  --font-size-small: clamp(0.85rem, 0.9vw, 0.95rem);
  /* Captions / Meta text */
}

/* -----------------------------------------------------------------------------
   2. CSS RESET & BASE STYLES
----------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background-color: var(--color-bg-primary);
  color: var(--color-text-main);
  font-family: var(--font-family-body);
  font-size: var(--font-size-body);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* -----------------------------------------------------------------------------
   3. TYPOGRAPHY ELEMENT STYLES
----------------------------------------------------------------------------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-headers);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text-main);
}

h1 {
  font-size: var(--font-size-h1);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
}

h2 {
  font-size: var(--font-size-h2);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

h3 {
  font-size: var(--font-size-h3);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-sm);
}

p {
  color: var(--color-text-body);
  margin-bottom: var(--space-md);
}

a {
  color: var(--color-accent-end);
  text-decoration: none;
  transition: var(--transition-fast);
}

a:hover {
  color: var(--color-text-main);
}

strong {
  color: var(--color-text-main);
  font-weight: 600;
}

blockquote {
  border-left: 3px solid var(--color-accent-start);
  padding: var(--space-sm) 0 var(--space-sm) var(--space-md);
  margin: var(--space-md) 0;
  font-style: italic;
  background: rgba(30, 41, 59, 0.3);
  border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
}

/* -----------------------------------------------------------------------------
   4. LAYOUT COMPONENTS (HEADER, NAVIGATION, FOOTER)
----------------------------------------------------------------------------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 25, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-main);
  padding: var(--space-sm) 0;
}

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

.logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  opacity: 1;
  transition: transform 180ms ease, opacity 180ms ease;
}

.logo:hover,
.logo:focus-visible {
  opacity: 1;
  transform: scale(1.02);
  outline: none;
}

.logo-img {
  height: 32px;
  width: auto;
  max-width: 180px;
  display: block;
  object-fit: contain;
  opacity: 1;
  filter: none;
  transition: filter 180ms ease;
}

.logo:hover .logo-img,
.logo:focus-visible .logo-img {
  filter: drop-shadow(0 0 6px rgba(249, 115, 22, 0.25));
}

.footer-branding .logo-img,
.footer-branding .logo-img-footer {
  height: 25px;
  width: auto;
  max-width: 150px;
  display: block;
  object-fit: contain;
  opacity: 1;
  filter: none;
  transition: filter 180ms ease;
}

.footer-branding .logo:hover .logo-img-footer,
.footer-branding .logo:focus-visible .logo-img-footer {
  filter: drop-shadow(0 0 5px rgba(249, 115, 22, 0.2));
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--space-md);
  align-items: center;
}

/* Navigation Links */
.nav-link {
  color: var(--color-text-body);
  font-size: var(--font-size-small);
  font-weight: 600;
  padding: 0.4rem 0.8rem;
  border-radius: var(--border-radius-sm);
  border: 1px solid transparent;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  position: relative;
  transition: var(--transition-smooth);
}

/* Inactive nav links underline effect on hover/focus */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0.2rem;
  left: 0.8rem;
  width: calc(100% - 1.6rem);
  height: 2px;
  background-color: var(--color-accent-start); /* ODICIUM Orange (#F97316) */
  transform: scaleX(0);
  transform-origin: bottom center;
  transition: transform 0.3s ease;
}

.nav-link:not(.active):hover,
.nav-link:not(.active):focus-visible {
  outline: none;
  color: var(--color-text-main);
}

.nav-link:not(.active):hover::after,
.nav-link:not(.active):focus-visible::after {
  transform: scaleX(1);
}

/* Active / Current Page State (Permanent Orange Outlined Box) */
.nav-link.active {
  color: var(--color-text-main) !important;
  border-color: var(--color-accent-start) !important; /* Permanent Orange outline */
  background-color: rgba(31, 41, 55, 0.4) !important; /* Premium dark/transparent background */
}

/* Prevent underline from displaying on active boxed link */
.nav-link.active::after {
  display: none !important;
}

.footer {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border-main);
  padding: var(--space-xl) 0 var(--space-lg);
  margin-top: var(--space-xxl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.footer-branding p {
  max-width: 320px;
  margin-top: var(--space-xs);
  font-size: var(--font-size-small);
}

.footer-links h4 {
  font-size: var(--font-size-small);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
  color: var(--color-text-muted);
}

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

.footer-links li {
  margin-bottom: var(--space-xs);
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
}

.footer-links a:hover {
  color: var(--color-accent-end);
}

.footer-bottom {
  border-top: 1px solid var(--color-border-main);
  padding-top: var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}

/* -----------------------------------------------------------------------------
   5. INTERACTIVE NODES & VALUE CHAIN LAYOUTS (HOMEPAGE CUSTOMS)
----------------------------------------------------------------------------- */
/* Interactive Node Connection Box */
.node-graph-box {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-main);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

/* Value Chain Flow Layout */
.value-chain-wrapper {
  padding: var(--space-md) 0;
  margin: var(--space-md) 0;
  display: flex;
  justify-content: center;
  width: 100%;
}

.value-chain-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  width: 100%;
}

.value-chain-step {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-main);
  border-radius: var(--border-radius-md);
  padding: var(--space-sm) var(--space-md);
  text-align: center;
  position: relative;
  cursor: help;
  transition: var(--transition-smooth);
}

.value-chain-step:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent-end);
  box-shadow: 0 4px 20px var(--color-accent-glow);
}

.value-chain-step strong {
  display: block;
  font-size: var(--font-size-small);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.value-chain-arrow {
  color: var(--color-accent-start);
  font-weight: 700;
  font-size: var(--font-size-h3);
}

/* -----------------------------------------------------------------------------
   6. UI COMPONENT STYLES (BUTTONS & CARDS)
----------------------------------------------------------------------------- */
/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family-headers);
  font-weight: 600;
  font-size: var(--font-size-small);
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-accent-start); /* Solid ODICIUM Orange (#F97316) */
  color: var(--color-text-dark);              /* Graphite Text (#1F2937) for contrast */
  border: 1px solid var(--color-accent-start);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background-color: #fb923c;                  /* Slightly brighter orange on hover */
  border-color: #fb923c;
  color: var(--color-text-dark);              /* Keeps text black/dark */
  box-shadow: 0 4px 15px var(--color-accent-glow);
}

.btn-secondary {
  background-color: rgba(15, 17, 21, 0.6);   /* Very dark background */
  color: var(--color-text-main);              /* White text */
  border: 1px solid var(--color-accent-start); /* Orange border */
}

.btn-secondary:hover {
  transform: translateY(-2px);
  background-color: var(--color-accent-start); /* Orange background on hover */
  border-color: var(--color-accent-start);
  color: var(--color-text-dark);              /* Black text on hover */
  box-shadow: 0 4px 15px var(--color-accent-glow);
}

/* Cards */
.card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border-main);
  border-radius: var(--border-radius-md);
  padding: var(--space-md);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover,
.card:focus-within {
  border-color: var(--color-accent-start) !important;
  box-shadow: 0 4px 20px var(--color-accent-glow);
  transform: translateY(-2px);
}

/* Glassmorphism Card Overlay */
.card-glass {
  background: var(--color-bg-card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--color-border-main);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.card-glass:hover,
.card-glass:focus-within {
  border-color: var(--color-accent-start) !important;
  box-shadow: 0 4px 20px var(--color-accent-glow);
  transform: translateY(-2px);
}

/* Permanently Featured Cards */
.card-featured {
  border: 2px solid var(--color-accent-start) !important;
  box-shadow: 0 4px 20px var(--color-accent-glow);
  position: relative;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.card-featured:hover,
.card-featured:focus-within {
  border-color: var(--color-accent-start) !important;
  box-shadow: 0 6px 25px var(--color-accent-glow);
  transform: translateY(-2px);
}

/* -----------------------------------------------------------------------------
   7. FORM DESIGN & MULTI-STEP LOGIC
----------------------------------------------------------------------------- */
.form-step {
  display: none;
  /* Controlled via JS validation rules */
}

.form-step.active {
  display: block;
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-size: var(--font-size-small);
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--color-text-main);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-family-body);
  font-size: var(--font-size-body);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-main);
  border-radius: var(--border-radius-sm);
  color: var(--color-text-main);
  transition: var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent-end);
  box-shadow: 0 0 8px var(--color-accent-glow);
}

/* Checkbox & Radio Alignment */
.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-sm);
  margin-top: var(--space-xs);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  cursor: pointer;
}

.checkbox-label input {
  accent-color: var(--color-accent-start);
  width: 18px;
  height: 18px;
}

/* Radio Group List */
.radio-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-xs);
}

.radio-label {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border-main);
  border-radius: var(--border-radius-sm);
  background-color: rgba(30, 41, 59, 0.2);
  transition: var(--transition-smooth);
}

.radio-label:hover {
  border-color: var(--color-accent-end);
  background-color: rgba(30, 41, 59, 0.4);
}

.radio-label input {
  accent-color: var(--color-accent-start);
}

/* Form Nav Bar */
.form-navigation {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-lg);
  border-top: 1px solid var(--color-border-main);
  padding-top: var(--space-md);
}

/* Honeypot Spam Prevention (Hidden visually but available to bots) */
.honeypot-group {
  display: none;
  visibility: hidden;
}

/* -----------------------------------------------------------------------------
   8. SECTION STRUCTURING & SECTIONS
----------------------------------------------------------------------------- */
.section {
  padding: var(--space-xl) 0;
}

.section-alt {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border-main);
  border-bottom: 1px solid var(--color-border-main);
  padding: var(--space-xl) 0;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

.section-header p {
  font-size: var(--font-size-body);
}

/* -----------------------------------------------------------------------------
   9. CALL-TO-ACTION (CTA) BANNERS
----------------------------------------------------------------------------- */
.cta-banner {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(30, 41, 59, 0.95));
  border: 2px solid var(--color-accent-start) !important;
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px var(--color-accent-glow), 0 10px 40px rgba(0, 0, 0, 0.5);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.cta-banner:hover,
.cta-banner:focus-within {
  border-color: var(--color-accent-start) !important;
  box-shadow: 0 6px 25px var(--color-accent-glow), 0 10px 40px rgba(0, 0, 0, 0.5);
  transform: translateY(-2px);
}

.cta-banner::before {
  display: none;
}

.cta-banner h2 {
  margin-bottom: var(--space-xs);
}

.cta-banner p {
  max-width: 500px;
  margin: 0 auto var(--space-md);
}

/* -----------------------------------------------------------------------------
   10. KEYBOARD ACCESSIBILITY FOCUS RULES
----------------------------------------------------------------------------- */
/* Custom keyboard focus ring (WCAG AA compliance support) */
button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
.value-chain-step:focus-visible {
  outline: 2px solid var(--color-accent-end);
  outline-offset: 4px;
}

/* Screen reader only helper */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* -----------------------------------------------------------------------------
   11. CORE UTILITY CLASSES
----------------------------------------------------------------------------- */
.container {
  width: 90%;
  max-width: var(--grid-max-width);
  margin: 0 auto;
  padding: 0 var(--space-xs);
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: var(--space-md);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

/* Flex Utilities */
.flex-row {
  display: flex;
  gap: var(--space-md);
}

.flex-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

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

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

.justify-center {
  justify-content: center;
}

/* Text Alignments */
.text-center {
  text-align: center;
}

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

/* Gradient text */
.text-gradient {
  background: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Margins */
.mb-xs {
  margin-bottom: var(--space-xs);
}

.mb-sm {
  margin-bottom: var(--space-sm);
}

.mb-md {
  margin-bottom: var(--space-md);
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

/* -----------------------------------------------------------------------------
   12. RESPONSIVE BREAKPOINTS (MEDIA QUERIES)
----------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {

  /* Layout adjustments */
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .navbar-container {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .logo-img {
    height: 28px;
  }

  .nav-menu {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  /* Form scaling */
  .checkbox-grid {
    grid-template-columns: 1fr;
  }

  /* Value Chain Flow Layout for mobile (vertical stack) */
  .value-chain-container {
    flex-direction: column;
    width: 100%;
    align-items: stretch;
  }

  .value-chain-arrow {
    transform: rotate(90deg);
    margin: var(--space-xxs) auto;
  }
}