/* ============================================
   INDIAN SOCIETY FOR CHRONOBIOLOGY - STYLES
   Professional Light Theme with #4154f1
   ============================================ */

/* ----- CSS Variables ----- */
:root {
  --primary: #4154f1;
  --primary-light: #eef0ff;
  --primary-dark: #2a3bc9;
  --primary-rgb: 65, 84, 241;
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #1e293b;
  --text-secondary: #64748b;
  --border: #e2e8f0;
  --shadow: rgba(0, 0, 0, 0.06);
  --shadow-lg: rgba(65, 84, 241, 0.15);
  --radius: 20px;
  --transition: all 0.3s ease;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

/* ----- Utility Classes ----- */
.bg-primary {
  background-color: var(--primary);
}

.bg-primary-light {
  background-color: var(--primary-light);
}

.text-primary {
  color: var(--primary);
}

.text-secondary {
  color: var(--text-secondary);
}

.border-primary {
  border-color: var(--primary);
}

.shadow-primary {
  box-shadow: 0 8px 30px var(--shadow-lg);
}

.section-pad {
  padding-top: 2rem;
  padding-bottom: 2rem;
}

/* ----- Buttons ----- */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 16px;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  text-align: center;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 30px var(--shadow-lg);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(65, 84, 241, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 10px 24px;
  font-size: 14px;
}

/* ----- Navigation ----- */
.nav-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: var(--transition);
}

.nav-wrapper.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 20px var(--shadow);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  height: 70px;
  max-width: 1280px;
  margin: 0 auto;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
  transition: var(--transition);
}

.logo-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-text {
  font-weight: 700;
  font-size: 24px;
  color: var(--text);
}

.logo-text span {
  color: var(--primary);
}

/* Nav Links */
.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
  align-items: center;
}

.nav-links li a {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  transition: var(--transition);
}

.nav-links li a:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.nav-links li a.active {
  background: var(--primary);
  color: #fff;
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: var(--transition);
}

.mobile-menu-btn:hover {
  background: var(--primary-light);
}

.mobile-menu {
  display: none;
  padding: 16px 20px 20px;
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.98);
}

.mobile-menu a {
  display: block;
  padding: 12px 16px;
  border-radius: 8px;
  font-weight: 500;
  color: var(--text);
  transition: var(--transition);
}

.mobile-menu a:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.mobile-menu a.active {
  background: var(--primary);
  color: #fff;
}

/* ----- Hero Section ----- */
/* ====== HERO ADDITIONAL STYLES ====== */

.hero-description {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin-bottom: 16px;
}

.founding-info {
  margin-bottom: 20px;
}

.founding-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  padding: 16px 20px;
  background: var(--primary-light);
  border-radius: 12px;
  border-left: 4px solid var(--primary);
  max-width: 550px;
}

.founding-text i {
  margin-right: 8px;
  color: var(--primary);
}

/* Mission Tags */
.mission-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  max-width: 550px;
}

.mission-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: white;
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text);
  border: 1px solid var(--border);
  transition: var(--transition);
  box-shadow: 0 2px 8px var(--shadow);
}

.mission-tag i {
  color: var(--primary);
  font-size: 12px;
}

.mission-tag:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  transform: translateY(-2px);
}

.mission-tag:hover i {
  color: white;
}

/* ====== RESPONSIVE ====== */
@media (max-width: 1024px) {
  .hero-description {
    margin: 0 auto 16px;
  }
  
  .founding-text {
    max-width: 100%;
  }
  
  .mission-tags {
    max-width: 100%;
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .hero-description {
    font-size: 1rem;
  }
  
  .founding-text {
    font-size: 0.9rem;
    padding: 14px 16px;
  }
  
  .mission-tag {
    font-size: 11px;
    padding: 5px 12px;
  }
}

@media (max-width: 480px) {
  .hero-description {
    font-size: 0.95rem;
  }
  
  .founding-text {
    font-size: 0.85rem;
    padding: 12px 14px;
  }
  
  .mission-tags {
    gap: 6px;
  }
  
  .mission-tag {
    font-size: 10px;
    padding: 4px 10px;
  }
  
  .mission-tag i {
    font-size: 10px;
  }
}

.hero {
  position: relative;
  display: flex;
  align-items: center;
  padding-top: 80px;
  overflow: hidden;
}

#three-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.2;
}

.hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-text h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 16px;
}

.hero-text h1 span {
  color: var(--primary);
}

.hero-text p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ----- Hero Carousel ----- */
.hero-carousel {
  position: relative;
  width: 100%;
  aspect-ratio: 1/1;
  max-width: 500px;
  margin: 0 auto;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(65, 84, 241, 0.12);
  border: 1px solid rgba(65, 84, 241, 0.08);
  background: var(--primary-light);
}

.hero-carousel .slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
  object-fit: cover;
}

.hero-carousel .slide.active {
  opacity: 1;
}

.hero-carousel .slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Carousel Controls */
.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.9);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  font-size: 20px;
  color: var(--primary);
  box-shadow: 0 4px 12px var(--shadow);
  transition: var(--transition);
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
}

.carousel-arrow:hover {
  background: var(--primary);
  color: #fff;
}

.carousel-arrow.prev {
  left: 12px;
}

.carousel-arrow.next {
  right: 12px;
}

.carousel-indicators {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 5;
}

.carousel-indicators .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.carousel-indicators .dot.active {
  background: var(--primary);
  border-color: #fff;
  transform: scale(1.2);
}

.slide-counter {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  z-index: 5;
  backdrop-filter: blur(4px);
}

.slide-title {
  position: absolute;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
  padding: 8px 20px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 500;
  z-index: 5;
  backdrop-filter: blur(4px);
  text-align: center;
  width: 100%;
  max-width: 95%;
  
  /* 2-line clamp instead of nowrap */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.3;
}

/* ----- Section Styles ----- */
.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text);
  display: inline-block;
  border-bottom: 4px solid var(--primary);
  padding-bottom: 4px;
  margin-bottom: 8px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 40px;
}

/* About Cards */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.about-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: 0 4px 20px var(--shadow);
  transition: var(--transition);
  border-top: 4px solid var(--primary);
}

.about-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px var(--shadow);
}

.about-card .icon {
  font-size: 32px;
  margin-bottom: 16px;
}

.about-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 10px;
}

.about-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Member Cards */
.member-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: 0 4px 20px var(--shadow);
  transition: var(--transition);
}

.member-card:hover {
  box-shadow: 0 8px 40px var(--shadow);
}

.member-card h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
}

.member-card ul {
  list-style: none;
}

.member-card ul li {
  padding: 6px 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.member-card ul li strong {
  color: var(--primary);
}

/* Research Cards */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.research-card {
  background: var(--primary-light);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid rgba(65, 84, 241, 0.1);
  transition: var(--transition);
}

.research-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px var(--shadow-lg);
}

.research-card .icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.research-card h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 8px;
}

.research-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Events List */
.events-list {
  list-style: none;
}

.events-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.events-list li:last-child {
  border-bottom: none;
}

.events-list li strong {
  color: var(--primary);
}

/* SAMAY Grid */
.samay-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
}

.samay-item {
  background: var(--surface);
  padding: 20px;
  border-radius: var(--radius);
  text-align: center;
  box-shadow: 0 4px 12px var(--shadow);
  transition: var(--transition);
  border: 2px solid transparent;
  color: var(--text);
  font-weight: 500;
}

.samay-item:hover {
  border-color: var(--primary);
  box-shadow: 0 8px 30px var(--shadow-lg);
  transform: translateY(-4px);
}

/* ----- Footer ----- */
.footer {
  background: #f1f5f9;
  border-top: 1px solid var(--border);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 50px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

.footer-brand .logo {
  margin-bottom: 12px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  max-width: 300px;
}

.footer h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
}

.footer ul {
  list-style: none;
}

.footer ul li {
  margin-bottom: 8px;
}

.footer ul li a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer ul li a:hover {
  color: var(--primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  margin-top: 40px;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ----- Responsive ----- */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-text p {
    margin: 0 auto 32px;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-carousel {
    max-width: 450px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: block;
  }

  .mobile-menu.open {
    display: block;
  }

  .hero-text h1 {
    font-size: 2.5rem;
  }

  .hero-text p {
    font-size: 1rem;
  }

  .hero-carousel {
    max-width: 100%;
  }

  .section-title {
    font-size: 2rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .carousel-arrow {
    width: 32px;
    height: 32px;
    font-size: 16px;
  }

  .slide-title {
    font-size: 11px;
    padding: 6px 14px;
    bottom: 44px;
  }
}

@media (max-width: 480px) {
  .hero-text h1 {
    font-size: 2rem;
  }

  .btn {
    padding: 12px 24px;
    font-size: 14px;
  }

  .section-pad {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }

  .about-grid,
  .research-grid {
    grid-template-columns: 1fr;
  }

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

  .carousel-indicators .dot {
    width: 8px;
    height: 8px;
  }
}