/* Custom styles for redesigned homepage */
/* Reset and base typography */
@import url('https://fonts.googleapis.com/css?family=Oswald:400,500|Cabin:400,700&display=swap');

:root {
  --e-pink: #E71B64;
}

html,body {
  margin:0;
  padding:0;
  font-family: 'Cabin', sans-serif;
  line-height:1.6;
  color:#333;
  background: url('../img/bg-small-dark.jpg') no-repeat center center fixed;
  background-size: cover;
}

h1,h2,h3,h4,h5,h6{margin:0;}

.main-nav {
  position:fixed;
  top:0;
  left:0;
  right:0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  background:#111;
  padding:0 1rem;
  height:60px;
  z-index:1000;
  border-bottom: 2px solid var(--e-pink);
}
.main-nav .logo {
  font-family:'Oswald', sans-serif;
  font-size:1.5rem;
  color:#fff;
  text-decoration:none;
  transition: color 0.3s ease;
}
.main-nav .logo:hover {
  color: var(--e-pink);
}
.nav-links {
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
}
.nav-links li + li {margin-left:1.5rem;}
.nav-links a {
  color:#fff;
  text-decoration:none;
  padding:0.5rem;
  font-weight:500;
  transition: color 0.2s ease;
}
.nav-links a:hover,
.nav-links .active > a {
  color: var(--e-pink);
  opacity: 1;
}
.nav-links a:focus {outline:2px solid var(--e-pink);}

/* Dropdown */
.nav-links .dropdown {
  position: relative;
  display: inline-block;
}
.nav-links .dropdown-content {
  display: none;
  position: absolute;
  background-color: #111;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.5);
  z-index: 1001;
  top: 100%;
  left: 0;
  border-radius: 4px;
  overflow: hidden;
  padding: 0;
}
.nav-links .dropdown-content li {
  margin-left: 0;
}
.nav-links .dropdown-content a {
  display: block;
  padding: 10px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.nav-links .dropdown-content a:hover {
  background-color: #333;
}
.nav-links .dropdown:hover .dropdown-content {
  display: block;
}

body {padding-top:60px;} /* offset for fixed nav */

/* paragraph background for better contrast on busy backgrounds */
.main-content p.contrast {
  background: rgba(255,255,255,0.85);
  padding: 1rem;
  border-radius: 6px;
  color: #000;
  max-width: 800px;
  margin: 0 auto 1.5rem;
}

/* Hero section (homepage) */
.hero {
  position: relative;
  background: rgba(0,0,0,0.8);
  color:#fff;
  text-align:center;
  padding:8rem 2rem;
  margin: 0;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1; /* relative positioning stack context */
}

/* Semi-transparent pattern overlays for .hero */
.hero::before, .hero::after,
.page-hero::before, .page-hero::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0;
  width: 50%;
  pointer-events: none;
  opacity: 0.15;
  z-index: -1;
}

/* PCB Pattern Left */
.hero::before, .page-hero::before {
  left: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cg fill='none' stroke='%23ffffff' stroke-width='1.5' stroke-linecap='square' stroke-linejoin='miter'%3E%3C!-- 8-pin SOIC Footprint --%3E%3Crect x='15' y='10' width='10' height='20' stroke-width='1'/%3E%3Cpath d='M10,12 h5 m-5,5 h5 m-5,5 h5 m-5,5 h5' stroke-width='2'/%3E%3Cpath d='M25,12 h5 m-5,5 h5 m-5,5 h5 m-5,5 h5' stroke-width='2'/%3E%3C!-- SOT-23 Transistor Footprint --%3E%3Crect x='90' y='20' width='6' height='10' stroke-width='1'/%3E%3Cpath d='M85,22 h5 m-5,6 h5' stroke-width='2'/%3E%3Cpath d='M96,25 h5' stroke-width='2'/%3E%3C!-- 0805 Resistor/Capacitor Pads --%3E%3Cpath d='M50,30 h8 m10,0 h8' stroke-width='4'/%3E%3Cpath d='M10,60 v8 m0,10 v8' stroke-width='4'/%3E%3C!-- QFP 16-pin Square Footprint --%3E%3Crect x='50' y='70' width='20' height='20' stroke-width='1'/%3E%3Cpath d='M52,65 v5 m4,-5 v5 m4,-5 v5 m4,-5 v5' stroke-width='1.5'/%3E%3Cpath d='M52,90 v5 m4,-5 v5 m4,-5 v5 m4,-5 v5' stroke-width='1.5'/%3E%3Cpath d='M45,72 h5 m-5,4 h5 m-5,4 h5 m-5,4 h5' stroke-width='1.5'/%3E%3Cpath d='M70,72 h5 m-5,4 h5 m-5,4 h5 m-5,4 h5' stroke-width='1.5'/%3E%3C!-- Resistor Schematic Symbol --%3E%3Cpath d='M80,105 l3,-4 l6,8 l6,-8 l6,8 l3,-4' stroke-width='1.2'/%3E%3C!-- Capacitor Schematic Symbol --%3E%3Cpath d='M30,100 h10 m-10,4 h10' stroke-width='2'/%3E%3Cpath d='M35,95 v5 m0,4 v5' stroke-width='1'/%3E%3C!-- Diode Schematic Symbol --%3E%3Cpath d='M95,65 l-6,4 l0,-8 z' stroke-width='1' fill='%23ffffff'/%3E%3Cpath d='M89,61 v8' stroke-width='2'/%3E%3Cpath d='M100,65 h-5 m-6,0 h-5' stroke-width='1'/%3E%3C/g%3E%3C/svg%3E") repeat;
  -webkit-mask-image: linear-gradient(to right, black 30%, transparent 90%);
  mask-image: linear-gradient(to right, black 30%, transparent 90%);
}

/* 3D Print Isometric Pattern Right */
.hero::after, .page-hero::after {
  right: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='69.282'%3E%3Cg stroke='%23ffffff' stroke-width='1' fill='none'%3E%3Cpath d='M20 0 L40 11.547 L40 34.641 L20 46.188 L0 34.641 L0 11.547 Z'/%3E%3Cpath d='M20 46.188 L20 69.282'/%3E%3Cpath d='M0 34.641 L20 23.094 L40 34.641'/%3E%3Cpath d='M20 23.094 L20 0'/%3E%3C/g%3E%3C/svg%3E") repeat;
  -webkit-mask-image: linear-gradient(to left, black 20%, transparent);
  mask-image: linear-gradient(to left, black 20%, transparent);
}

/* Page hero for sub-pages */
.page-hero {
  position: relative;
  overflow: hidden;
  z-index: 1;
  background: rgba(0,0,0,0.8);
  color: #fff;
  text-align: center;
  padding: 6rem 1rem;
  margin-top: 0;
}
.page-hero .hero-content h1 {
  font-family: 'Oswald', sans-serif;
  font-size: 2.5rem;
}
.page-hero .hero-content p {
  margin-top: 1rem;
  font-size: 1.2rem;
  opacity: 0.9;
}
.hero .hero-content {
  max-width:800px;
  margin:0 auto;
}
.hero h1 {
  font-family: 'Oswald', sans-serif;
  font-size:3rem;
  line-height:1.2;
}
.hero p {
  font-size:1.25rem;
  margin-top:1rem;
}

/* Masonry Wrapper */
.masonry-wrapper {
  padding: 5rem 1rem;
  max-width: 1200px;
  margin: 0 auto;
  column-count: 2;
  column-gap: 2rem;
}

/* Sidebar Layout */
.sidebar-layout {
  display: flex;
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  align-items: flex-start;
  padding: 2rem 1rem;
}
.sidebar-layout .sidebar {
  flex: 0 0 300px;
  position: sticky;
  top: 80px; /* Below fixed nav */
}
.sidebar-layout .content {
  flex: 1;
}

/* Sidebar Navigation inside card */
.sidebar .project-card {
  padding: 1.5rem;
  margin-bottom: 0;
}
.sidebar .sidebar-nav {
  list-style: none;
  padding: 0;
  margin: 0;
}
.sidebar .sidebar-nav li {
  margin-bottom: 0.5rem;
}
.sidebar .sidebar-nav a {
  color: #ddd;
  text-decoration: none;
  display: block;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  transition: color 0.2s, border-bottom-color 0.2s;
}
.sidebar .sidebar-nav a:hover, .sidebar .sidebar-nav a.active {
  color: var(--e-pink);
  border-bottom-color: var(--e-pink);
}

/* Glassmorphism Dark Cards */
.project-card {
  break-inside: avoid;
  margin-bottom: 2rem;
  padding: 2.5rem;
  background: rgba(20, 20, 20, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: #fff;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.project-card:hover {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
  border-color: var(--e-pink);
}

.project-card h2 {
  margin-bottom: 1rem;
  font-family: 'Oswald', sans-serif;
  font-size: 1.8rem;
  color: #fff;
}

.project-card p {
  margin-bottom: 1.5rem;
  color: #ddd;
  font-size: 1.1rem;
  line-height: 1.5;
}

.project-card a:not(.button) {
  color: var(--e-pink);
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.2s ease;
}

.project-card a:not(.button):hover {
  text-decoration: underline;
  opacity: 0.8;
}

.project-card .button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: #007acc;
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
  transition: background .3s ease, transform .2s ease, box-shadow .3s ease;
}

.project-card .button:hover {
  background: var(--e-pink);
  transform: scale(1.02);
  box-shadow: 0 4px 15px rgba(231, 27, 100, 0.4);
}

@media (max-width: 768px) {
  .masonry-wrapper {
    column-count: 1;
  }
}

/* How it works */
.how-it-works {padding:2rem 1rem;}
.how-it-works h2 {text-align:center;margin-bottom:2rem;font-family:'Oswald',sans-serif;}
.how-it-works ol {max-width:600px;margin:0 auto;padding-left:1.25rem;}

/* Education section */
.education {padding:2rem 1rem;text-align:center;}
.education p {max-width:700px;margin:0 auto;}

/* Footer */
footer {
  background:#111;
  color:#ccc;
  padding:2rem 1rem;
  font-size:0.9rem;
  border-top: 2px solid var(--e-pink);
}
.footer-container {display:flex;flex-wrap:wrap;justify-content:center;margin-bottom:1rem;}
.footer-col {flex:1 1 200px;margin:0.5rem 1rem;text-align:left;}
.footer-col a {
  color:#ccc;
  text-decoration:none;
  transition: color 0.2s ease;
}
.footer-col a:hover {
  text-decoration:none;
  color: var(--e-pink);
}

/* Responsive tweaks */
@media (max-width:768px) {
  .hero h1 {font-size:2.5rem;}
  .spoke {max-width:100%;}
  .nav-links li + li {margin-left:1rem;}
}