/* Shashwat Singh | Research Showcase Stylesheet */

:root {
  --background-dark: #080412;
  --bg-cosmic: radial-gradient(circle at 50% 30%, rgba(28, 12, 55, 1) 0%, rgba(8, 4, 18, 1) 100%);
  --accent-gold: hsl(38, 100%, 55%);
  --accent-blue: hsl(200, 100%, 55%);
  --spacing-s: 8px;
  --spacing-m: 16px;
  --spacing-l: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 64px;
  --width-container: 1400px;
}

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

html, body {
  width: 100%;
  min-height: 100%;
  background-color: var(--background-dark);
  font-family: 'Outfit', sans-serif;
  overflow-x: hidden;
}

/* Glassmorphic Navbar */
.navbar {
  position: sticky;
  top: 0;
  width: 100%;
  background: rgba(20, 10, 30, 0.75);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  z-index: 1000;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--width-container);
  margin: 0 auto;
  padding: 1rem 2rem;
  box-sizing: border-box;
}

.nav-back-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: #fff;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: none;
  transition: all 0.3s ease;
  text-decoration: none;
}

.nav-back-button:hover {
  color: var(--accent-gold);
  text-shadow: 0 0 10px rgba(255, 180, 50, 0.4);
  transform: translateX(-3px);
}

.navbar-title {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.ag-timeline-block {
  background-color: var(--background-dark);
  padding: 3rem 0 1.5rem 0;
}

.ag-timeline_title-box {
  background-color: transparent;
  text-align: center;
  text-transform: uppercase;  
  font-weight: 600;
}

.ag-timeline_tagline {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 3rem;
  color: #fff;
  letter-spacing: 2px;
  background: linear-gradient(135deg, #ffffff 40%, var(--accent-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-section {
  align-items: center;
  background: var(--bg-cosmic);
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 180px);
  justify-content: flex-start;
  padding: 0 var(--spacing-l) var(--spacing-xxl) var(--spacing-l);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  grid-column-gap: var(--spacing-l);
  grid-row-gap: var(--spacing-l);
  max-width: var(--width-container);
  width: 90%;
  margin-top: 1rem;
}

@media(min-width: 540px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr); 
  }
}

@media(min-width: 960px) {
  .card-grid {
    grid-template-columns: repeat(5, 1fr); 
  }
}

.card {
  list-style: none;
  position: relative;
  border-radius: var(--spacing-m);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
  cursor: pointer;
}

.card:before {
  content: '';
  display: block;
  padding-bottom: 140%;
  width: 100%;
}

.card__background {
  background-size: cover;
  background-position: center;
  bottom: 0;
  filter: brightness(0.6) saturate(1.2) contrast(0.9);
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
  transform-origin: center;
  transform: scale(1) translateZ(0);
  transition: filter 300ms cubic-bezier(0.4, 0, 0.2, 1),
              transform 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover {
  border-color: var(--accent-gold);
  box-shadow: 0 0 25px rgba(255, 180, 50, 0.25);
  transform: translateY(-5px);
}

.card:hover .card__background {
  transform: scale(1.06) translateZ(0);
  filter: brightness(0.75) saturate(1.3) contrast(1.0);
}

.card-grid:hover > .card:not(:hover) .card__background {
  filter: brightness(0.3) saturate(0.2) contrast(1.1) blur(4px);
}

.card__content {
  left: 0;
  padding: var(--spacing-l);
  position: absolute;
  top: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background: linear-gradient(to top, rgba(8, 4, 18, 0.8) 0%, transparent 60%);
}

.card__category {
  color: var(--accent-gold);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-s);
}

.card__heading {
  color: #fff;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.25rem;
  text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.5);
  line-height: 1.3;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Glassmorphic Fluid Expanding Details Drawer */
.expanding-div {
  position: relative;
  display: none;
  width: 90%;
  max-width: var(--width-container);
  overflow: hidden;
  font-size: 1.15rem;
  line-height: 1.7;
  color: #fff;
  margin: 3.5rem auto 0 auto;
  text-align: justify;
  background: rgba(25, 15, 45, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 2.5rem;
  backdrop-filter: blur(20px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.expanding-div p {
  margin-bottom: 1.2rem;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.85);
}

.expanding-div p:last-child {
  margin-bottom: 0;
}

.expanding-div a {
  color: var(--accent-gold);
  text-decoration: none;
  border-bottom: 1px dashed rgba(255, 180, 50, 0.5);
  transition: all 0.3s ease;
}

.expanding-div a:hover {
  color: #fff;
  border-bottom-style: solid;
  border-bottom-color: var(--accent-gold);
  text-shadow: 0 0 10px rgba(255, 180, 50, 0.4);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive adjustments */
@media(max-width: 768px) {
  .ag-timeline_tagline {
    font-size: 2rem;
  }
  
  .navbar-container {
    padding: 0.8rem 1rem;
  }
  
  .navbar-title {
    display: none;
  }

  .expanding-div {
    width: 95%;
    padding: 1.5rem;
    font-size: 1.05rem;
    line-height: 1.6;
    margin-top: 2rem;
  }
  
  .card__heading {
    font-size: 1.1rem;
  }
}

.chirp-box {
  max-width: 640px;
  margin: 0 auto var(--spacing-xl);
  padding: 0 var(--spacing-m);
  text-align: center;
}
#chirp-play {
  background: transparent;
  color: var(--accent-gold);
  border: 1px solid var(--accent-gold);
  border-radius: 999px;
  padding: 10px 22px;
  font: 700 14px Montserrat, sans-serif;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
#chirp-play:hover { background: var(--accent-gold); color: var(--background-dark); }
#chirp-canvas { display: block; width: 100%; height: 90px; margin-top: var(--spacing-m); }
.chirp-note { color: rgba(255, 255, 255, 0.55); font-size: 12px; margin-top: var(--spacing-s); }