/* -------------------------------
   CSS Variables (easy amendments)
-------------------------------- */
:root {
  /* Layout sizing */
  --sidebar-width: 200px;
  --topbar-height: 60px;
  --footer-height: 50px;
  --main-padding: 2rem;
  --max-text-width: 850px;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --text-color: #000;
  --font-size: 16px;
  --line-height: 1.6;

  /* Spacing rhythm */
  --paragraph-spacing: 1.2rem;
  --heading-spacing-large: 2rem;    /* h2 */
  --heading-spacing-medium: 1.5rem; /* h3 */
  --image-spacing: 1.5rem;
  --first-heading-offset: 1.5rem;   /* top align with sidebar */

  /* Sidebar */
  --sidebar-bg: #f4f4f4;
  --sidebar-link-spacing: 1rem;
  --sidebar-icon-size: 1.2rem;
  --sidebar-icon-gap: 0.5rem;
  --sidebar-width-collapsed: 60px; /* narrow collapsed state */

  /* Footer */
  --footer-bg: #f4f4f4;
  --footer-font-size: 0.9rem;

  /* Photos */
  --image-max-width: 100%;          /* % of column width */
  --image-full-width: 100%;         /* % of main area */
  --image-border-radius: 0;         /* e.g. 0 or 8px */
  --image-shadow: none;             /* e.g. none or 0 2px 8px rgba(0,0,0,0.1) */

  /* NEW: Main background */
  --main-bg: #fff;
}

/* Bold Config */
strong {
  font-weight: 500; /* medium emphasis, not full bold */
}

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

html, body {
  height: 100%;
  font-family: var(--font-family);
  color: var(--text-color);
  background: var(--main-bg);
  overflow: hidden; /* scrolling only inside .main */
}

html { scroll-padding-top: var(--topbar-height); }

/* -------------------------------
   Top Bar
-------------------------------- */
.top-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: var(--topbar-height);
  width: 100%;
  display: flex;
  justify-content: space-between; /* left + right alignment */
  align-items: center;
  background: var(--main-bg);
  border-bottom: 1px solid #ddd;
  z-index: 1000;
}

.top-left {
  width: var(--sidebar-width);
  display: flex;
  align-items: center;
  padding-left: 1rem;
}

.top-right {
  flex: unset;             /* no forced expansion */
  padding-left: 0;
  padding-right: 1rem;     /* spacing from right edge */
  display: flex;
  align-items: center;
}

.site-title {
  font-size: 1.2rem;
  font-weight: 600;
}

.logo img {
  height: 30px;
  width: auto;
  display: block;
}

/* Hamburger button */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.hamburger span {
  display: block;
  height: 2px;
  background-color: #888;  /* gray, unobtrusive */
  border-radius: 1px;
  transition: background-color 0.2s ease;
}

.hamburger:hover span {
  background-color: #333;  /* darker on hover */
}

.whitepaper-btn {
  margin-right: 1rem;         /* spacing before the hamburger */
  padding: 0.4rem 0.8rem;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  color: #fff;
  background-color: #2f6f4e;  /* greenfi theme */
  border-radius: 4px;
  transition: background-color 0.2s ease;
}

.whitepaper-btn:hover {
  background-color: #24553b;  /* darker on hover */
}



/* -------------------------------
   Sidebar
-------------------------------- */
.sidebar {
  position: fixed;
  top: var(--topbar-height);
  left: 0;
  width: var(--sidebar-width);
  height: calc(100vh - var(--topbar-height) - var(--footer-height));
  background: var(--sidebar-bg);
  padding: 1rem;
  overflow-y: auto;
}

.sidebar ul {
  list-style: none;
}

.sidebar li {
  margin: var(--sidebar-link-spacing) 0;
}


/* Sidebar link row */
.sidebar a {
  display: flex;
  align-items: center;         /* centers icon + text */
  gap: var(--sidebar-icon-gap);/* spacing between icon + label */
  text-decoration: none;
  color: var(--text-color);
  font-size: var(--font-size);
  
}



.sidebar a .label {
  flex: 1;
}



/* -------------------------------
   Main Content Container
-------------------------------- */
.main {
  position: fixed;
  top: var(--topbar-height);
  left: var(--sidebar-width);
  width: calc(100% - var(--sidebar-width));
  height: calc(100vh - var(--topbar-height) - var(--footer-height));
  background: var(--main-bg);
  overflow-y: auto;
  padding: 0 var(--main-padding) var(--main-padding) var(--main-padding);
}

/* -------------------------------
   Text + Photo Column System
-------------------------------- */
.main section {
  max-width: var(--max-text-width);
  margin: 0 auto 3rem auto;
  width: 100%;
  font-size: var(--font-size);
  line-height: var(--line-height);
}

/* Headings */

.main h2 {
  display: flex;
  align-items: center;
  gap: 0.45rem; /* same logic as h3 */
  margin: var(--heading-spacing-large) 0 1rem 0;
  font-size: 1.6rem;
  font-weight: 600;
}

.main h2 i[data-lucide] {
  width: 1.3em;           /* proportional to text size */
  height: 1.3em;
  stroke-width: 2;        /* slightly bolder for h2 */
  margin-left: -2px;      /* optical align like h3 */
  position: relative;
  top: 1px;               /* aligns icon midline to text */
  flex-shrink: 0;
}







.main h3 {
  display: flex;
  align-items: center;
  gap: 0.45rem;          /* balanced spacing between icon and text */
  margin: var(--heading-spacing-medium) 0 0.8rem 0;
  font-size: 1.2rem;
  font-weight: 500;
}

.main h3 i[data-lucide] {
  width: 1.1em;          /* slightly smaller than text height */
  height: 1.1em;
  stroke-width: 1.8;     /* lighter line for subtlety */
  margin-left: -2px;     /* optically aligns icon with text block */
  position: relative;
  top: 1px;              /* nudges it perfectly to text midline */
  flex-shrink: 0;
}

.main h5 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1rem;
  font-weight: 500;
  margin-top: 1rem;
  margin-left: 2.2rem; /* ✅ aligns with .step-text */
}




/* -------------------------------
   Step Layout (numbered sections)
-------------------------------- */
.step {
  display: flex;
  flex-direction: column;
  margin-bottom: 1.5rem;
}

.step h5 {
  display: inline-flex;          /* keeps natural left flow */
  align-items: center;           /* vertical centering */
  font-size: 1rem;
  font-weight: 600;
  margin: 1rem 0 0.4rem 0;
  gap: 0.4rem;
}

.step h5 i[data-lucide] {
  width: 1.1em;
  height: 1.1em;
  stroke-width: 1.8;
  position: relative;
  top: 1px;                      /* optical alignment */
  flex-shrink: 0;
  opacity: 0.9;
}

.step-text {
  margin-left: 2.2rem; /* aligns text exactly under heading text */
  font-weight: 400;
}



/* First section heading aligns with sidebar */
.main section:first-of-type h2 {
  margin-top: var(--first-heading-offset);
}

/* Paragraphs */
.main p {
  font-weight: 400;
  margin-bottom: 1rem;  /* more modest default */
}

/* Sidebar + general icon-text */
.icon-text {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}





/* Links */
.main a { 
  text-decoration: underline; 
  color: var(--link-color);
}

/* Links: always black + underlined in content */
.main a,
.main a:visited,
.main a:hover,
.main a:active {
  color: #000;
  text-decoration: underline;
}

/* CTA: keep bold if you like */
.main a.cta-link {
  font-weight: 600;
}

/* CTA (optional) */
/* CTA links: clean look */
.main a.cta-link {
  display: inline-block;
  margin-top: 1rem;
  font-weight: 400;
  color: #000;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.main a.cta-link:hover {
  text-decoration: underline; /* underline on hover */
}

.main a.cta-link::after {
  content: " →";
}


/* Images */
.main img {
  display: block;
  max-width: var(--image-max-width);
  height: auto;
  margin: var(--image-spacing) auto;
  border-radius: var(--image-border-radius);
  box-shadow: var(--image-shadow);
}

.main img.full-width {
  max-width: var(--image-full-width);
}

/* Brand (logo + text together) */
.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;   /* space between logo + text */
  padding-left: 1rem;
}

.brand .logo {
  height: 30px;  /* adjust size of logo */
  width: auto;
}

.brand .logo {
  height: 32px;        /* or whatever fits nicely */
  width: auto;
  margin-right: 8px;   /* 🔑 space between logo and text */
}

.brand .site-title {
  font-size: 1.2rem;
  font-weight: 600;
}



/* Sidebar-only icon-text styling */
.sidebar .icon-text {
  display: flex;
  align-items: center;   /* keep icon + text vertically centered */
  gap: 0.5rem;           /* spacing between icon and text */
  margin: 0.2rem 0;      /* tighter spacing top + bottom */
  line-height: 1.2;      /* more compact */
}

/* Case Study page layout*/
.case-study dt {
  font-weight: 600;
  margin-right: 0.5rem;
}
.case-study dd {
  margin: 0 0 0.4rem 0;
}


.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;  /* 16:9 ratio */
  height: 0;
  overflow: hidden;
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
  margin: 2em auto;        /* centers horizontally */
  max-width: 900px;        /* makes it bigger, adjust as needed */
  width: 100%;             /* ensures it scales down on small screens */
}

.video-wrapper iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: none;
}

/* -------------------------------
   Scroll down indicator
-------------------------------- */

.scroll-indicator {
  position: fixed;
  bottom: 70px; /* just above footer */
  right: 1rem; /* position within main content */
  z-index: 900;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  opacity: 0.85;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.scroll-indicator:hover {
  opacity: 1;
  transform: scale(1.05);
}

/* keep it stable when sidebar collapses */
body.collapsed .scroll-indicator {
  right: 2rem;
}




/* -------------------------------
   Footer
-------------------------------- */
.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  height: var(--footer-height);
  width: 100%;
  background: var(--footer-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--footer-font-size);
  border-top: 1px solid #ddd;
}

/* -------------------------------
   Collapsed State
-------------------------------- */
body.collapsed .sidebar {
  width: var(--sidebar-width-collapsed);
}

body.collapsed .sidebar .label {
  display: none; /* hide link text labels */
}

body.collapsed .main {
  left: var(--sidebar-width-collapsed);
  width: calc(100% - var(--sidebar-width-collapsed));
}


/* ✅ Align step headings with paragraph text */
.step h5 {
  margin-left: 2.2rem !important; /* match .step-text indent */
}

/* -------------------------------
   Mobile (≤768px)
-------------------------------- */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: var(--topbar-height);
    left: -100%;
    width: var(--sidebar-width);
    height: calc(100vh - var(--topbar-height));
    background: var(--sidebar-bg);
    transition: left 0.3s ease;
    z-index: 1500;
  }

  /* On mobile, "collapsed" = visible */
  body.collapsed .sidebar { left: 0; }

  /* Sidebar labels should always show on mobile */
  .sidebar .label { display: inline; }

  /* Main content stays full width */
  .main { left: 0; width: 100%; }

  /* Hamburger: explicit height + thicker bars */
  .hamburger {
    display: flex !important;
    flex-direction: column;
    justify-content: space-between;
    position: absolute;
    top: 50%;
    right: 1rem;
    transform: translateY(-50%);
    width: 24px;
    height: 20px;
    z-index: 5000;
  }
  .hamburger span {
    flex: 0 0 3px;
    width: 100%;
    background-color: #000 !important;
    border-radius: 2px;
  }

  /* Hide footer on mobile, show on Contacts page only */
  .footer { display: none !important; }
  body.contacts .footer { display: flex !important; }

  /* Hide logos in main content on mobile (keep sidebar icons) */
  .main img[src*="logo"],
  .main .logo {
    display: none !important;
  }
}
/* Mobile: hide Lucide icons in MAIN headings */
@media (max-width: 768px) {
  /* hide both pre-render <i> and rendered <svg> icons */
  .main h2 i[data-lucide],
  .main h2 svg.lucide,
  .main h3 i[data-lucide],
  .main h3 svg.lucide,
  .main h5 i[data-lucide],
  .main h5 svg.lucide {
    display: none !important;
  }

  /* tighten heading layout when icons are removed */
  .main h2,
  .main h3,
  .main h5 {
    gap: 0 !important;
  }
}