/* ============================================
   LAYOUT STYLES (layout.html)
   
   This is the BASE stylesheet loaded on every
   page. It controls elements that appear on
   ALL pages: the navbar, the footer, and
   global CSS resets.
   
   Page-specific styles live in their own files:
   - home.css        → Home page
   - methodology.css → Methodology page
   - carbon_app.css  → Calculator + Dashboard
   
   Color palette (site-wide):
   - #14532d  Darkest green (logo text, nav links)
   - #1b4332  Deep green (hover states)
   - #2d6a4f  Medium green (buttons)
   - #e8e6df  Light beige (navbar, footer, backgrounds)
   - #cdc3b7  Medium beige (cards, containers)
   ============================================ */


/* ============================================
   1. CSS RESET & GLOBAL DEFAULTS
   Applied to every element on every page.
   ============================================ */

/* Import Roboto font from Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@100;400&display=swap');

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

body {
  font-family: 'Roboto', sans-serif;
  background: #fff;
  line-height: 1.6;
}

/* Site-wide content container (max 1320px, centered) */
.container {
  margin: auto;
  max-width: 1320px;
}

/* Remove bullet points from all lists */
ul {
  list-style: none;
}

/* Default link styling */
a {
  color: #333;
  text-decoration: none;
}

/* Default heading weight */
h1, h2 {
  font-weight: 400;
  line-height: 1.2;
}

/* Default paragraph styling */
p {
  margin: 10px 0;
  font-size: 14px;
}

/* Make images responsive by default */
img {
  width: 100%;
}


/* ============================================
   2. NAVBAR
   Horizontal bar at the top of every page.
   Contains: logo (left), nav links (center),
   and logout/login button (right).
   ============================================ */

/* Navbar section background */
.section_carbon_app_navbar {
  background-color: #e8e6df;
}

/* Main navbar flex container */
.carbon_app_navbar {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  height: 70px;
  align-items: center;
  background-color: #e8e6df;
}

/* Nav element inside navbar (holds center + right link groups) */
.carbon_app_navbar nav {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: space-between;
}

/* All navbar links */
.carbon_app_navbar a {
  color: #14532d;
  padding: 10px 20px;
  margin: 0 5px;
  font-size: 20px;
  text-decoration: none;
}

/* Underline effect on hover */
.carbon_app_navbar a:hover {
  border-bottom: #14532d 4px solid;
}

/* Navbar link lists (horizontal row) */
.carbon_app_navbar ul {
  display: flex;
  flex-direction: row;
}

/* --- Logo --- */

/* Logo container */
.carbon_app_navbar .logo {
  color: white;
  font-size: 35px;
  font-weight: 700;
  letter-spacing: 1px;
  font-family: 'Arial';
}

/* Logo link (no underline, no hover border) */
.carbon_app_navbar .logo a {
  color: white;
  text-decoration: none;
  display: flex;
  align-items: center;
  font-size: inherit;
}

.carbon_app_navbar .logo a:hover {
  border-bottom: none !important;
  color: white;
}

/* --- Nav link groups --- */

/* Center links (Home, Methodology, Calculator) */
.nav-center {
  justify-content: center;
  flex: 1;
}

/* Right links (Logout/Login button) */
.nav-right {
  justify-content: flex-end;
}

/* Green text used in the logo ("Green" in "GreenRoute") */
.text-logo {
  color: #14532d;
}

/* --- Logout / Login button --- */

.logout-btn {
  background-color: #e8e6df;
  color: #ffffff;
  border: 2px solid #14532d;
  border-radius: 8px;
  padding: 8px 16px;
  font-weight: 600;
}

.logout-btn:hover {
  background-color: #14532d;
  color: #ffffff;
}


/* ============================================
   3. FOOTER
   Horizontal bar at the bottom of every page.
   Three sections: brand name (left), scroll-up
   arrow (center), and nav links (right).
   ============================================ */

/* Footer section background */
.section_footer {
  background-color: #e8e6df;
}

/* Footer flex container */
.footer {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  gap: 40px;
  height: 60px;
}

/* "GreenRoute © 2026" text on the left */
.footer_left {
  font-size: 22px;
  font-weight: 700;
  font-family: 'Arial', sans-serif;
}

/* Scroll-up arrow in the center */
.footer_center a {
  padding: 0;
  margin: 0;
}

.footer_center a:hover {
  border-bottom: none;
}

/* Arrow lift effect on hover */
.footer_center a:hover i {
  transform: translateY(-3px);
  color: #1b4332 !important;
}

/* Navigation links on the right (Home, Methodology, Calculator) */
.footer_links {
  display: flex;
  gap: 20px;
}

.footer_links a {
  color: #14532d;
  text-decoration: none;
  font-size: 20px;
  font-weight: 700;
  font-family: 'Arial', sans-serif;
  padding: 0;
  margin: 0;
  transition: color 0.2s ease;
}

.footer_links a:hover {
  color: #1b4332;
  text-decoration: none;
  border-bottom: #14532d 4px solid;
}


/* ============================================
   4. RESPONSIVE
   Adjustments for tablets and phones.
   ============================================ */

@media (max-width: 768px) {
  /* Stack navbar vertically */
  .carbon_app_navbar {
    height: 180px;
    flex-direction: column;
  }

  /* Smaller nav links on mobile */
  .carbon_app_navbar a {
    font-size: 15px;
    padding: 5px 20px;
  }

  /* Stack nav links vertically */
  .carbon_app_navbar ul {
    display: flex;
    flex-direction: column;
  }

  /* Thinner underline on mobile hover */
  .carbon_app_navbar a:hover {
    color: #14532d;
    border-bottom: #14532d 2px solid;
  }
}