/* ==========================================================================
   CLIMATE SUMMIT 2.0 - BRAND STYLESHEET
   Matching logo palette: Navy Blue (#0f2942), Sky Blue (#0077c8), Eco Green (#52b788)
   ========================================================================== */

:root {
  --navy-dark: #0f2942;
  --navy-primary: #1e3a8a;
  
  --blue-sky: #0284c7;
  --blue-sky-light: #e0f2fe;
  
  --green-eco: #2d8a4e;
  --green-eco-light: #f0fdf4;
  --green-border: #bbf7d0;

  --bg-body: #f8fafc;
  --bg-card: #ffffff;
  
  --text-dark: #0f172a;
  --text-muted: #475569;
  --text-light: #64748b;
  
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;

  --font-main: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(15, 41, 66, 0.08);
  --shadow-lg: 0 10px 25px -5px rgba(15, 41, 66, 0.12);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-body);
  color: var(--text-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --------------------------------------------------------------------------
   NAVBAR
   -------------------------------------------------------------------------- */
.navbar {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  padding: 0.75rem 0;
}

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

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo {
  height: 48px;
  width: auto;
  border-radius: 50%;
  object-fit: contain;
}

.brand-title-wrap {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--navy-dark);
  letter-spacing: -0.3px;
  line-height: 1.2;
}

.brand-sub {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--green-eco);
  letter-spacing: 0.5px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.8rem;
}

.nav-link {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--blue-sky);
}

.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  color: var(--navy-dark);
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   BUTTONS & BADGES
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-main);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 0.65rem 1.3rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: var(--blue-sky);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
}

.btn-primary:hover {
  background-color: #0369a1;
  transform: translateY(-1px);
}

.btn-outline {
  background-color: #ffffff;
  color: var(--navy-dark);
  border-color: var(--border-color);
}

.btn-outline:hover {
  background-color: var(--bg-body);
  border-color: var(--border-hover);
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 0.85rem 1.6rem;
  font-size: 1rem;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--green-eco);
  background: var(--green-eco-light);
  border: 1px solid var(--green-border);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--green-eco);
}

/* --------------------------------------------------------------------------
   HERO SECTION
   -------------------------------------------------------------------------- */
.hero-section {
  padding: 4rem 0 3.5rem 0;
  background: linear-gradient(180deg, #ffffff 0%, var(--bg-body) 100%);
  border-bottom: 1px solid var(--border-color);
}

.hero-container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
  margin-bottom: 3.5rem;
}

.hero-title {
  font-size: clamp(2.3rem, 4vw, 3.2rem);
  font-weight: 800;
  color: var(--navy-dark);
  letter-spacing: -0.8px;
  line-height: 1.15;
  margin: 1.2rem 0 1.5rem 0;
}

.year-highlight {
  color: var(--blue-sky);
}

.theme-card {
  background: #ffffff;
  border-left: 4px solid var(--green-eco);
  border-top: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.theme-badge {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-light);
  letter-spacing: 1px;
  margin-bottom: 0.2rem;
}

.theme-text {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy-dark);
}

.hero-narrative {
  font-size: 1.02rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Hero Media Display */
.hero-media {
  display: flex;
  justify-content: center;
}

.logo-display-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.2rem;
  text-align: center;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  max-width: 320px;
}

.hero-logo-img {
  width: 220px;
  height: auto;
  border-radius: 50%;
  box-shadow: 0 4px 15px rgba(0,0,0,0.06);
}

.logo-caption strong {
  display: block;
  font-size: 1.05rem;
  color: var(--navy-dark);
}

.logo-caption span {
  font-size: 0.85rem;
  color: var(--text-light);
}

/* Key Details Ribbon */
.key-details-ribbon {
  display: flex;
  align-items: center;
  justify-content: space-around;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.8rem;
  box-shadow: var(--shadow-md);
}

.ribbon-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.ribbon-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--blue-sky-light);
  color: var(--blue-sky);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.ribbon-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-light);
}

.ribbon-val {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--navy-dark);
}

.text-accent {
  color: var(--green-eco);
}

.ribbon-sep {
  width: 1px;
  height: 36px;
  background-color: var(--border-color);
}

/* --------------------------------------------------------------------------
   SECTIONS GENERAL
   -------------------------------------------------------------------------- */
.section {
  padding: 4.5rem 0;
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  margin-bottom: 2.8rem;
}

.section-tag {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--blue-sky);
  display: block;
  margin-bottom: 0.3rem;
}

.section-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--navy-dark);
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 0.98rem;
  color: var(--text-light);
  margin-top: 0.4rem;
}

.section-line {
  width: 50px;
  height: 3px;
  background: var(--blue-sky);
  margin: 0.8rem auto 0 auto;
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   GUIDELINES SECTION
   -------------------------------------------------------------------------- */
.guidelines-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.guideline-row {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.25rem 1.8rem;
  border-bottom: 1px solid var(--border-color);
}

.guideline-row:last-child {
  border-bottom: none;
}

.guideline-icon-box {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-body);
  border: 1px solid var(--border-color);
  color: var(--navy-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.accent-box {
  background: var(--green-eco-light);
  color: var(--green-eco);
  border-color: var(--green-border);
}

.guideline-details strong {
  display: block;
  font-size: 0.98rem;
  color: var(--navy-dark);
}

.guideline-details p {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.highlight-row {
  background: #fafdfb;
}

.highlight-date-text {
  color: var(--green-eco) !important;
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   WHY SUBMIT SECTION
   -------------------------------------------------------------------------- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
}

.why-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.8rem 1.5rem;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.why-card:hover {
  border-color: var(--blue-sky);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.why-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--blue-sky-light);
  color: var(--blue-sky);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 1.2rem;
}

.why-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 0.5rem;
}

.why-card p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   IMPORTANT DATES SECTION
   -------------------------------------------------------------------------- */
.dates-flex {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.date-box {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.date-badge-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-light);
  margin-bottom: 0.4rem;
}

.alert-label {
  color: var(--green-eco);
}

.event-label {
  color: var(--blue-sky);
}

.date-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 0.5rem;
}

.date-day {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-dark);
}

.deadline-box {
  background: var(--green-eco-light);
  border-color: var(--green-border);
}

.deadline-box .date-day {
  color: var(--green-eco);
}

.event-box {
  background: var(--navy-dark);
  color: #ffffff;
}

.event-box .date-title,
.event-box .date-day {
  color: #ffffff;
}

/* --------------------------------------------------------------------------
   ABOUT SECTION
   -------------------------------------------------------------------------- */
.about-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem 2.2rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
}

.about-card p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.about-card p:last-child {
  margin-bottom: 0;
}

.callforpapers-intro {
  border-left: 4px solid var(--green-eco);
}

.callforpapers-intro h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.callforpapers-intro h3 i {
  color: var(--green-eco);
}

.sub-note {
  font-weight: 600;
  color: var(--navy-dark) !important;
  font-style: italic;
}

/* --------------------------------------------------------------------------
   SUB-THEMES SECTION
   -------------------------------------------------------------------------- */
.subthemes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.subtheme-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.8rem 1.6rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}

.subtheme-card:hover {
  border-color: var(--blue-sky);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.subtheme-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--green-eco-light);
  border: 1px solid var(--green-border);
  color: var(--green-eco);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1rem;
}

.subtheme-card h3 {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 0.8rem;
}

.subtheme-card ul {
  list-style: none;
  padding: 0;
}

.subtheme-card li {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  padding: 0.35rem 0 0.35rem 1.2rem;
  position: relative;
}

.subtheme-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.72rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green-eco);
}

/* --------------------------------------------------------------------------
   VENUE SECTION
   -------------------------------------------------------------------------- */
.venue-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.2rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.venue-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: var(--blue-sky-light);
  color: var(--blue-sky);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.venue-details h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--navy-dark);
  margin-bottom: 0.3rem;
}

.venue-address {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.venue-narrative {
  font-size: 0.92rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   PORTAL SECTION
   -------------------------------------------------------------------------- */
.portal-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.5rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.portal-card p {
  font-size: 1.02rem;
  color: var(--text-muted);
  margin-bottom: 1.2rem;
}

.portal-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  background: var(--blue-sky);
  padding: 0.85rem 2rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
  transition: all 0.2s ease;
}

.portal-link:hover {
  background: #0369a1;
  transform: translateY(-1px);
}

/* --------------------------------------------------------------------------
   CLOSING QUOTE BANNER
   -------------------------------------------------------------------------- */
.quote-banner {
  background: var(--navy-dark);
  padding: 3.5rem 0;
}

.closing-quote {
  text-align: center;
  position: relative;
}

.quote-icon {
  font-size: 1.8rem;
  color: var(--green-eco);
  margin-bottom: 0.8rem;
  display: block;
  opacity: 0.6;
}

.closing-quote p {
  font-size: 1.25rem;
  font-weight: 600;
  color: #ffffff;
  font-style: italic;
  line-height: 1.7;
  max-width: 700px;
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   CONTACT SECTION
   -------------------------------------------------------------------------- */
.contact-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.2rem;
  display: flex;
  align-items: center;
  justify-content: space-around;
  box-shadow: var(--shadow-sm);
}

.contact-col {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--blue-sky-light);
  color: var(--blue-sky);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.c-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-light);
  display: block;
  margin-bottom: 0.3rem;
}

.c-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.c-link {
  color: var(--blue-sky);
  font-weight: 600;
  text-decoration: none;
}

.c-link:hover {
  text-decoration: underline;
}

.c-slash {
  color: var(--border-hover);
}

.phone-link {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy-dark);
}

.contact-divider {
  width: 1px;
  height: 50px;
  background-color: var(--border-color);
}

/* --------------------------------------------------------------------------
   FOOTER
   -------------------------------------------------------------------------- */
.footer {
  background: var(--navy-dark);
  color: #94a3b8;
  padding: 2.5rem 0;
  font-size: 0.88rem;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.footer-logo {
  height: 42px;
  border-radius: 50%;
}

.footer-brand strong {
  color: #ffffff;
  display: block;
  font-size: 1rem;
}

.footer-brand p {
  color: #94a3b8;
  font-size: 0.82rem;
}

.footer-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
}

/* --------------------------------------------------------------------------
   MODAL
   -------------------------------------------------------------------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 41, 66, 0.65);
  backdrop-filter: blur(5px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 540px;
  padding: 2rem;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1.2rem;
  background: none;
  border: none;
  font-size: 1.8rem;
  color: var(--text-light);
  cursor: pointer;
}

.modal-header {
  margin-bottom: 1.5rem;
}

.modal-header h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--navy-dark);
}

.modal-header p {
  font-size: 0.88rem;
  color: var(--text-light);
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--navy-dark);
}

.form-group input {
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
}

.form-group input:focus {
  outline: none;
  border-color: var(--blue-sky);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.8rem;
  margin-top: 0.8rem;
}

/* --------------------------------------------------------------------------
   RESPONSIVE DESIGN
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .hero-media {
    order: -1;
  }

  .key-details-ribbon {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .ribbon-sep {
    width: 100%;
    height: 1px;
  }

  .contact-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
  }

  .venue-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .contact-divider {
    width: 100%;
    height: 1px;
  }

  .footer-meta {
    align-items: flex-start;
    text-align: left;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 64px;
    right: -100%;
    width: 260px;
    height: calc(100vh - 64px);
    background: #ffffff;
    border-left: 1px solid var(--border-color);
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem 1.5rem;
    transition: right 0.25s ease;
    box-shadow: -4px 0 15px rgba(0,0,0,0.05);
  }

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

  .hamburger {
    display: block;
  }
}