/* ==========================================================================
   Akvo Lab - Global Styles & Main Layout (main.css)
   ========================================================================== */

/* Import Core Variables */
@import url('variables.css');

/* ==========================================================================
   1. Modern Reset & Base Rules
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-title);
  color: var(--color-primary);
  font-weight: var(--weight-bold);
  line-height: 1.25;
  margin-bottom: 1rem;
}

h1 { font-size: var(--font-3xl); letter-spacing: -0.02em; }
h2 { font-size: var(--font-2xl); letter-spacing: -0.01em; }
h3 { font-size: var(--font-xl); }
h4 { font-size: var(--font-lg); }
h5 { font-size: var(--font-md); }
h6 { font-size: var(--font-sm); }

/* Anchor / Links */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: var(--transition-fast);
}

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

/* Images & Media */
img, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Lists */
ul, ol {
  list-style: none;
}

/* Material Symbols Icon Configuration */
.material-symbols-outlined {
  font-family: 'Material Symbols Outlined';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "liga";
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
}

/* Clean Custom Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-deep);
}

::-webkit-scrollbar-thumb {
  background: var(--color-primary-glow);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent);
}

/* Accessibility Focus Visible */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
}

/* Reduced Motion preferences */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   2. Layout & Grid System
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Responsive Padding for Sections */
.section {
  padding: var(--section-padding-desktop);
  position: relative;
}

.section-alt {
  background-color: var(--bg-surface);
}

/* Simple Responsive Grids */
.grid {
  display: grid;
  gap: var(--grid-gap);
}

.grid-2 {
  grid-template-columns: 1fr;
}

.grid-3 {
  grid-template-columns: 1fr;
}

.grid-4 {
  grid-template-columns: 1fr;
}

/* Desktop Grid Upgrades */
@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Helper flex layout structures */
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

/* Text Gradient Helper */
.text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

/* ==========================================================================
   3. Global Skeletons - Navbar & Header
   ========================================================================== */
.header-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(249, 249, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: 0 4px 20px rgba(0, 74, 135, 0.02);
  transition: var(--transition-smooth);
}

/* Scrolled Navbar State (shrunk) */
.header-nav.scrolled {
  padding: 0.5rem 0;
  background: rgba(249, 249, 255, 0.95);
  box-shadow: var(--shadow-glass);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  transition: var(--transition-smooth);
}

.header-nav.scrolled .nav-wrapper {
  height: 64px;
}

/* Logo styling */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-family-title);
  font-size: var(--font-lg);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
}

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

.brand-logo img {
  height: 40px;
}

/* Nav Menu Desktop */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-family: var(--font-family-title);
  font-size: var(--font-sm);
  font-weight: var(--weight-semibold);
  color: var(--text-secondary);
  padding: 8px 0;
  transition: var(--transition-fast);
  letter-spacing: 0.02em;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
}

/* Navigation Line Indicator Underline */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-brand);
  transition: var(--transition-smooth);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Mobile Menu Toggle (Glassmorphic Pill) */
.menu-toggle {
  display: none;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border-glass);
  padding: 6px 14px;
  border-radius: 20px;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-family: var(--font-family-title);
  font-size: var(--font-xs);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: var(--transition-smooth);
  box-shadow: 0 2px 10px rgba(0, 74, 135, 0.05);
  z-index: 1100;
  outline: none;
}

.menu-toggle:hover,
.menu-toggle:focus-visible {
  background: rgba(255, 255, 255, 0.9);
  color: var(--color-accent-hover);
  transform: scale(1.05);
  border-color: var(--color-accent);
}

.menu-toggle-text {
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.menu-toggle-icon {
  font-size: 18px !important;
  line-height: 1;
  transition: var(--transition-smooth);
}

.menu-toggle.active {
  background: rgba(255, 255, 255, 0.9);
  border-color: var(--color-accent);
  color: var(--color-accent-hover);
  box-shadow: 0 0 12px var(--color-accent-glow);
}

/* Mobile Navigation Drawer styles */
@media (max-width: 768px) {
  .nav-wrapper nav {
    display: contents;
  }

  .brand-logo {
    font-size: var(--font-md);
    gap: 6px;
    flex-shrink: 0;
  }

  .brand-logo svg {
    width: 28px;
    height: 28px;
  }

  .menu-toggle {
    display: flex;
    padding: 5px 12px;
    gap: 4px;
    flex-shrink: 0;
  }

  .menu-toggle-text {
    font-size: 10px;
  }

  .menu-toggle-icon {
    font-size: 16px !important;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 40px;
    box-shadow: -10px 0 30px rgba(0, 74, 135, 0.05);
    transition: var(--transition-smooth);
    z-index: 1050;
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-link {
    font-size: var(--font-md);
  }
}

/* ==========================================================================
   4. Global Skeletons - Footer
   ========================================================================== */
.footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-light);
  padding: 64px 0 24px;
  color: var(--text-secondary);
}

.footer-top {
  margin-bottom: 48px;
}

.footer-brand-column p {
  margin-top: 16px;
  font-size: var(--font-sm);
  color: var(--text-muted);
}

.footer-column-title {
  font-size: var(--font-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 24px;
  font-weight: var(--weight-bold);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  font-size: var(--font-sm);
  color: var(--text-secondary);
}

.footer-link:hover {
  color: var(--color-primary);
  padding-left: 4px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: var(--font-sm);
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.footer-contact-item svg,
.footer-contact-item .material-symbols-outlined {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--color-primary);
}

.footer-contact-item .material-symbols-outlined {
  font-size: 1.1rem;
}

.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
  font-size: var(--font-xs);
  color: var(--text-muted);
}

.footer-bottom-wrapper {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

@media (min-width: 768px) {
  .footer-bottom-wrapper {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-link {
  color: var(--text-muted);
}

.footer-bottom-link:hover {
  color: var(--text-secondary);
}