/* ============================================
   IEEE KLETU Student Branch — Style System
   ============================================ */

/* --- Custom Properties (aligned with KLE Tech Brand Guidebook) --- */
:root {
  --bg-canvas: #FBFBFA;
  --bg-white: #FFFFFF;
  --bg-surface: #F7F1EE;          /* KLE Ivory */

  --text-primary: #000000;
  --text-secondary: #433B36;       /* KLE Slate */
  --text-tertiary: #6B5E58;        /* KLE Quicksand */

  --border: #EAEAEA;
  --border-light: rgba(0, 0, 0, 0.04);

  --accent: #1a6fb5;
  --accent-hover: #155d99;
  --accent-light: #e8f2fc;
  --accent-text: #1a5a8f;

  /* KLE Tech brand palette (Brand Guidebook ch. 3) */
  --kletu-red: #BF383C;            /* Logo red — minimal accent use */
  --kletu-deep-red: #6B170D;       /* Primary "star" brand color */
  --kletu-nutmeg: #BFA682;         /* Warm beige secondary */
  --kletu-ivory: #F7F1EE;
  --kletu-sand: #E3D9C7;
  --kletu-quicksand: #6B5E58;
  --kletu-slate: #433B36;
  --kletu-gold: #D4A84B;           /* Legacy — reserved */

  --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.02);
  --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.04);
  --shadow-elevated: 0 8px 30px rgba(0, 0, 0, 0.06);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 9999px;

  /* Brand fonts: Lora (primary, headings) + Outfit (secondary, body) */
  --font-sans: 'Outfit', system-ui, -apple-system, sans-serif;
  --font-serif: 'Lora', Georgia, serif;
  --font-display: 'Lora', Georgia, serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  --container: 1280px;
  --navbar-height: 72px;
}


/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-canvas);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}


/* --- Skip Link --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  padding: 8px 16px;
  background: var(--text-primary);
  color: var(--bg-white);
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-size: 0.875rem;
  transition: top 0.2s var(--ease-out);
}

.skip-link:focus {
  top: 16px;
}


/* --- Container --- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

@media (min-width: 768px) {
  .container {
    padding: 0 40px;
  }
}


/* --- Reveal Animation --- */
.reveal {
  opacity: 0;
  transform: translateY(60px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}


/* ============================================
   Navbar
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 14px 32px;
  transition: padding 0.4s var(--ease-out);
}

.navbar.scrolled {
  padding: 8px 32px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
}

.navbar__wrap {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 32px;
}

.navbar__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.navbar__logo-img {
  height: 64px;
  width: auto;
  transition: height 0.4s var(--ease-out);
}

.navbar__inner {
  display: flex;
  align-items: center;
  padding: 8px 10px 8px 14px;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-pill);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06), 0 0 0 1px rgba(0, 0, 0, 0.03);
  transition: background 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.navbar.scrolled .navbar__inner {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.04);
}

.navbar.scrolled .navbar__logo-img {
  height: 48px;
}

@media (max-width: 899px) {
  .navbar {
    padding: 12px 16px;
  }

  .navbar__wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
  }

  .navbar__logo-img {
    height: 54px;
  }

  .navbar__inner {
    background: none;
    border: none;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    padding: 0;
    flex-shrink: 0;
  }

  .navbar.scrolled {
    padding: 8px 16px;
  }

  .navbar.scrolled .navbar__inner {
    background: none;
    box-shadow: none;
  }
}

.navbar__links {
  display: none;
  align-items: center;
  gap: 4px;
}

@media (min-width: 900px) {
  .navbar__links {
    display: flex;
  }
}

.navbar__links a {
  padding: 6px 12px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: color 0.2s var(--ease-out), background 0.2s var(--ease-out);
  white-space: nowrap;
}

.navbar__links a:hover {
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.04);
}

/* ----- Dropdowns (desktop) ----- */
.navbar__item--has-dropdown {
  position: relative;
}

.navbar__dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px 6px 12px;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: none;
  border: 0;
  border-radius: var(--radius-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.2s var(--ease-out), background 0.2s var(--ease-out);
}

.navbar__dropdown-trigger:hover,
.navbar__dropdown-trigger[aria-expanded="true"] {
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.04);
}

.navbar__dropdown-caret {
  font-size: 0.75rem;
  transition: transform 0.25s var(--ease-out);
}

.navbar__dropdown-trigger[aria-expanded="true"] .navbar__dropdown-caret {
  transform: rotate(180deg);
}

.navbar__dropdown {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 200px;
  padding: 8px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.02);
  list-style: none;
  margin: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out), visibility 0s linear 0.25s;
  z-index: 200;
}

.navbar__dropdown::before {
  /* Invisible hover bridge so moving from trigger to panel doesn't close it */
  content: '';
  position: absolute;
  top: -10px;
  left: 0;
  right: 0;
  height: 10px;
}

.navbar__item--has-dropdown.is-open .navbar__dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
  transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out), visibility 0s linear 0s;
}

.navbar__dropdown li {
  list-style: none;
}

.navbar__dropdown a {
  display: block;
  padding: 10px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: color 0.2s var(--ease-out), background 0.2s var(--ease-out);
}

.navbar__dropdown a:hover,
.navbar__dropdown a:focus-visible {
  color: var(--kletu-deep-red);
  background: var(--kletu-ivory);
}

/* Hamburger */
.navbar__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: background 0.2s var(--ease-out);
}

@media (min-width: 900px) {
  .navbar__hamburger {
    display: none;
  }
}

.navbar__hamburger:hover {
  background: rgba(0, 0, 0, 0.04);
}

.navbar__hamburger-line {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.35s var(--ease-out), opacity 0.25s var(--ease-out);
  transform-origin: center;
}

.navbar__hamburger.active .navbar__hamburger-line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.navbar__hamburger.active .navbar__hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.navbar__hamburger.active .navbar__hamburger-line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}


/* --- Mobile Menu --- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s var(--ease-out);
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu__links {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mobile-menu__links li {
  transform: translateY(20px);
  opacity: 0;
  transition: transform 0.5s var(--ease-out), opacity 0.5s var(--ease-out);
}

.mobile-menu.open .mobile-menu__links li {
  transform: translateY(0);
  opacity: 1;
}

.mobile-menu.open .mobile-menu__links li:nth-child(1) { transition-delay: 0.05s; }
.mobile-menu.open .mobile-menu__links li:nth-child(2) { transition-delay: 0.1s; }
.mobile-menu.open .mobile-menu__links li:nth-child(3) { transition-delay: 0.15s; }
.mobile-menu.open .mobile-menu__links li:nth-child(4) { transition-delay: 0.2s; }
.mobile-menu.open .mobile-menu__links li:nth-child(5) { transition-delay: 0.25s; }
.mobile-menu.open .mobile-menu__links li:nth-child(6) { transition-delay: 0.3s; }
.mobile-menu.open .mobile-menu__links li:nth-child(7) { transition-delay: 0.35s; }

.mobile-menu__links a {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  padding: 8px 16px;
  display: block;
  border-radius: var(--radius-md);
  transition: color 0.2s var(--ease-out);
}

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

/* ----- Mobile dropdown accordion ----- */
.mobile-menu__dropdown-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 8px 16px;
  font-family: inherit;
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  background: none;
  border: 0;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: color 0.2s var(--ease-out);
}

.mobile-menu__dropdown-trigger i {
  font-size: 1.25rem;
  color: var(--text-tertiary);
  transition: transform 0.3s var(--ease-out), color 0.2s var(--ease-out);
}

.mobile-menu__dropdown-trigger[aria-expanded="true"] {
  color: var(--kletu-deep-red);
}

.mobile-menu__dropdown-trigger[aria-expanded="true"] i {
  transform: rotate(180deg);
  color: var(--kletu-deep-red);
}

.mobile-menu__dropdown {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.35s var(--ease-out), opacity 0.25s var(--ease-out), margin 0.3s var(--ease-out);
}

.mobile-menu__item--has-dropdown.is-open .mobile-menu__dropdown {
  max-height: 240px;
  opacity: 1;
  margin: 4px 0 12px;
}

.mobile-menu__dropdown a {
  font-size: 1.125rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-tertiary);
  padding: 6px 16px;
}


/* ============================================
   Hero
   ============================================ */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 120px 24px 0;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
}

.hero__bg--fallback {
  background: linear-gradient(135deg, #e8e6e1 0%, #d4d0c8 40%, #c9c4ba 100%);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.45) 0%,
    rgba(255, 255, 255, 0.65) 30%,
    rgba(247, 246, 243, 0.88) 60%,
    rgba(247, 246, 243, 0.98) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  margin-bottom: 28px;
  backdrop-filter: blur(8px);
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero__title {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  margin-bottom: 20px;
}

.hero__title-ieee {
  font-size: clamp(3.5rem, 10vw, 7rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--text-primary);
}

.hero__title-college {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 3.5vw, 2.25rem);
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--text-primary);
}

.hero__title-branch {
  font-size: clamp(0.875rem, 1.8vw, 1.125rem);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-top: 4px;
}

.hero__title-motto {
  font-size: clamp(0.9rem, 2vw, 1.15rem);
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-top: 6px;
}

.hero__subtitle {
  max-width: 520px;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 32px;
  text-wrap: balance;
}

.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

/* Hero Stats */
.hero__stats {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 1px;
  background: var(--border);
  border-top: 1px solid var(--border);
  width: 100%;
  margin-top: auto;
}

.hero__stat {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 16px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
}

.hero__stat-number-wrap {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
}

.hero__stat-number {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
}

.hero__stat-plus {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 600;
  color: var(--accent);
}

.hero__stat-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* Scroll Hint */
.hero__scroll-hint {
  position: absolute;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  font-size: 1.25rem;
  color: var(--text-tertiary);
  animation: bounce-hint 2s var(--ease-out) infinite;
}

@keyframes bounce-hint {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.6; }
  50% { transform: translateX(-50%) translateY(8px); opacity: 1; }
}

@media (max-width: 640px) {
  .hero__stats {
    flex-wrap: wrap;
  }
  .hero__stat {
    flex: 1 1 50%;
    padding: 20px 12px;
  }
  .hero__scroll-hint {
    display: none;
  }
}


/* ============================================
   Shared Section Styles
   ============================================ */
.section {
  padding: 100px 0;
}

@media (min-width: 768px) {
  .section {
    padding: 120px 0;
  }
}

.section__header {
  margin-bottom: 56px;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
}

/* Heading: Lora (brand primary) in sentence case, black;
   accent span (em / .amp / .serif-accent) = Lora italic in KLE Deep Red */
.section__title {
  display: block;
  margin-top: 0;
  margin-bottom: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.2vw, 3.5rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  text-align: center;
  text-wrap: balance;
  color: var(--text-primary);
}

.section__title .amp,
.section__title em,
.section__title .serif-accent {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--kletu-deep-red);
  padding: 0;
}

.serif-accent {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
}

.section__subtitle {
  max-width: 640px;
  margin-inline: auto;
  font-size: clamp(1.125rem, 1.6vw, 1.25rem);
  line-height: 1.55;
  color: var(--text-secondary);
  margin-top: 20px;
  text-align: center;
}


/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background 0.2s var(--ease-out), color 0.2s var(--ease-out), transform 0.15s var(--ease-out), box-shadow 0.2s var(--ease-out);
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
}

.btn--primary {
  background: var(--text-primary);
  color: var(--bg-white);
}

.btn--primary:hover {
  background: #333;
  box-shadow: var(--shadow-hover);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.6);
  color: var(--text-primary);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.85);
  border-color: rgba(0, 0, 0, 0.15);
}

.btn--full {
  width: 100%;
  justify-content: center;
}

.btn__icon-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  transition: transform 0.25s var(--ease-out);
  font-size: 0.875rem;
}

.btn:hover .btn__icon-wrap {
  transform: translateY(2px);
}

.btn--primary .btn__icon-wrap {
  background: rgba(255, 255, 255, 0.15);
}

.btn--ghost .btn__icon-wrap {
  background: rgba(0, 0, 0, 0.06);
}


/* ============================================
   About Section
   ============================================ */
/* Numbered editorial list — shared by About and Contact sections.
   Lists break out of the container to full viewport width; row content is
   re-aligned to the container's inner edge via dynamic padding. */
.about__list,
.contact__list {
  list-style: none;
  padding: 0;
  margin: 56px 0 0;
  margin-inline: calc(50% - 50vw);
  width: 100vw;
  border-top: 1px solid var(--border);
}

.about__item,
.contact__item {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  padding: 28px max(1.5rem, calc(50vw - (var(--container) / 2) + 1.5rem));
  border-bottom: 1px solid var(--border);
  transition: background 0.3s var(--ease-out);
}

/* Left accent bar appears on hover (deep red, brand primary) */
.about__item::before,
.contact__item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--kletu-deep-red);
  opacity: 0;
  transform: scaleY(0.4);
  transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.about__item:hover,
.about__item:focus-within,
.contact__item:hover,
.contact__item:focus-within {
  background: var(--kletu-ivory);
}

.about__item:hover::before,
.about__item:focus-within::before,
.contact__item:hover::before,
.contact__item:focus-within::before {
  opacity: 1;
  transform: scaleY(1);
}

.about__item-num,
.contact__item-num {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 500;
  color: var(--kletu-sand);
  letter-spacing: -0.02em;
  line-height: 1;
  transition: color 0.3s var(--ease-out);
}

.about__item:hover .about__item-num,
.contact__item:hover .contact__item-num {
  color: var(--kletu-nutmeg);
}

.about__item-body,
.contact__item-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.about__item-title,
.contact__item-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.2vw, 2.125rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.1;
  color: var(--text-primary);
  margin: 0;
  transition: color 0.3s var(--ease-out);
}

.about__item:hover .about__item-title,
.contact__item:hover .contact__item-title {
  color: var(--kletu-deep-red);
}

.about__item-tag,
.contact__item-tag {
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text-tertiary);
  margin: 0;
  max-width: 60ch;
}

.about__item-cta,
.contact__item-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  background: var(--text-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
  transition: background 0.2s var(--ease-out), transform 0.15s var(--ease-out);
}

.about__item-cta::after,
.contact__item-cta::after {
  content: '\2192';
  font-size: 0.9rem;
  transition: transform 0.2s var(--ease-out);
}

.about__item:hover .about__item-cta,
.contact__item:hover .contact__item-cta {
  background: var(--kletu-deep-red);
}

.about__item-cta:hover::after,
.about__item:hover .about__item-cta::after,
.contact__item-cta:hover::after,
.contact__item:hover .contact__item-cta::after {
  transform: translateX(3px);
}

@media (max-width: 720px) {
  .about__list,
  .contact__list { margin-top: 40px; }
  .about__item,
  .contact__item {
    grid-template-columns: auto 1fr;
    grid-template-areas:
      "num body"
      ".   cta";
    row-gap: 14px;
    padding-block: 22px;
    padding-inline: 1rem;
  }
  .about__item-num,
  .contact__item-num { grid-area: num; align-self: start; padding-top: 4px; }
  .about__item-body,
  .contact__item-body { grid-area: body; }
  .about__item-cta,
  .contact__item-cta { grid-area: cta; justify-self: start; }
  .about__item-title,
  .contact__item-title { font-size: 1.4rem; }
  .about__item-tag,
  .contact__item-tag { font-size: 0.95rem; }
}


/* ============================================
   Chapters — Societies & Affinity Groups carousel
   ============================================ */
.chapters {
  background: var(--bg-white);
}

.chapters-carousel {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
}

.chapters-carousel__viewport {
  overflow: hidden;
  flex: 1;
  margin: 0 -24px;
  padding: 4px 24px;
  -webkit-mask-image: linear-gradient(to right, transparent 0, #000 24px, #000 calc(100% - 24px), transparent 100%);
          mask-image: linear-gradient(to right, transparent 0, #000 24px, #000 calc(100% - 24px), transparent 100%);
}

.chapters-carousel__track {
  display: flex;
  gap: 20px;
  list-style: none;
  padding: 0;
  margin: 0;
  scroll-snap-type: x mandatory;
  overflow-x: auto;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.chapters-carousel__track::-webkit-scrollbar {
  display: none;
}

.chapter-card {
  flex: 0 0 auto;
  width: 260px;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chapter-card__link {
  display: block;
  text-decoration: none !important;
  color: inherit !important;
  width: 100%;
  height: 100%;
}

.chapter-card__link:hover {
  text-decoration: none !important;
  color: inherit !important;
}

@media (min-width: 768px) {
  .chapter-card {
    width: 300px;
  }
}

.chapter-card__media {
  position: relative;
  aspect-ratio: 1 / 1;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md, 8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow: hidden;
  transition: border-color 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.chapter-card__media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.4s var(--ease-out);
}

.chapter-card__media-img--placeholder {
  opacity: 0.6;
  filter: grayscale(0.2);
}

.chapter-card:hover .chapter-card__media {
  border-color: rgba(0, 0, 0, 0.12);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.chapter-card:hover .chapter-card__media img {
  transform: scale(1.03);
}

.chapter-card__body {
  padding: 0 4px;
}

.chapter-card__name {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.chapter-card__meta {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-tertiary);
  letter-spacing: 0.02em;
}

/* Carousel nav buttons */
.chapters-carousel__nav {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-white);
  border: 1px solid var(--border);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  cursor: pointer;
  transition: background 0.2s var(--ease-out), border-color 0.2s var(--ease-out), opacity 0.2s var(--ease-out), transform 0.15s var(--ease-out);
  z-index: 2;
}

.chapters-carousel__nav:hover {
  background: var(--bg-canvas);
  border-color: rgba(0, 0, 0, 0.12);
}

.chapters-carousel__nav:active {
  transform: scale(0.94);
}

.chapters-carousel__nav[disabled] {
  opacity: 0.3;
  cursor: default;
  pointer-events: none;
}

@media (max-width: 640px) {
  .chapters-carousel {
    gap: 4px;
  }
  .chapters-carousel__nav {
    width: 40px;
    height: 40px;
  }
  .chapters-carousel__viewport {
    margin: 0 -16px;
    padding: 4px 16px;
  }
}


/* ============================================
   Contact Section — editorial rows with brand tints + choreographed hover
   ============================================ */
.contact {
  /* Soft rose — a light tint of --kletu-deep-red. Scope to the section so
     it's easy to tweak without touching the global palette. */
  --contact-bg: #F0DFDA;
  background: var(--contact-bg);
}

/* Header stays dark: black Lora heading, deep-red italic accent, muted subtitle */
.contact .section__title { color: var(--text-primary); }
.contact .section__title em,
.contact .section__title .amp,
.contact .section__title .serif-accent {
  color: var(--kletu-deep-red);
}
.contact .section__subtitle { color: var(--kletu-slate); }

/* Override shared list: contact gets permanent tinted "shelves" — full-width bands */
.contact__list {
  border-top: 0;
  display: flex;
  flex-direction: column;
  gap: 0;                       /* bands touch for clean editorial strip */
}

.contact__item {
  grid-template-columns: auto auto 1fr auto;
  align-items: center;
  padding-block: 36px;
  padding-inline: max(1.5rem, calc(50vw - (var(--container) / 2) + 1.5rem));
  border-bottom: 0;
  border-radius: 0;             /* full-bleed bands, no rounded corners */
  overflow: hidden;
  isolation: isolate;
}

/* All rows share the section's rose bg so the canvas reads as one piece */
.contact__item:nth-child(odd),
.contact__item:nth-child(even) {
  background: var(--contact-bg);
}

/* Decorative italic serif ampersand watermark — animates in on hover */
.contact__item::after {
  content: '&';
  position: absolute;
  right: 18px;
  bottom: -40px;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 13rem;
  font-weight: 500;
  line-height: 1;
  color: var(--kletu-deep-red);
  opacity: 0;
  transform: translate(14px, 8px) rotate(-6deg);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
  pointer-events: none;
  z-index: 0;
}

.contact__item:hover::after {
  opacity: 0.08;
  transform: translate(0, 0) rotate(0deg);
}

/* Row hover — deepen the rose tint so the row "warms up" against the canvas */
.contact__item:hover,
.contact__item:focus-within {
  background: #E6CFC8;           /* 1 step deeper than --contact-bg */
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(107, 23, 13, 0.08);
}
.contact__item {
  transition: background 0.4s var(--ease-out), transform 0.4s var(--ease-out),
              box-shadow 0.4s var(--ease-out);
}

/* Keep row content above the decorative glyph */
.contact__item-num,
.contact__item-icon,
.contact__item-body,
.contact__item-cta { position: relative; z-index: 1; }

/* Number — deeper, warmer, with tiny idle tilt on hover */
.contact__item-num {
  color: var(--kletu-nutmeg);
  transition: color 0.4s var(--ease-out), transform 0.4s var(--ease-out);
}
.contact__item:hover .contact__item-num {
  color: var(--kletu-deep-red);
  transform: translateX(-2px);
}

/* Icon badge — circular, deep-red by default; on hover inverts with a halo and tilts */
.contact__item-icon {
  width: 56px;
  height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--kletu-deep-red);
  color: #fff;
  font-size: 1.5rem;
  flex-shrink: 0;
  box-shadow: 0 0 0 0 rgba(107, 23, 13, 0);
  transition: background 0.4s var(--ease-out), color 0.4s var(--ease-out),
              transform 0.5s var(--ease-out), box-shadow 0.5s var(--ease-out);
}
.contact__item-icon i { line-height: 1; }

.contact__item:hover .contact__item-icon {
  background: #fff;
  color: var(--kletu-deep-red);
  transform: rotate(-8deg) scale(1.08);
  box-shadow: 0 0 0 8px rgba(107, 23, 13, 0.1);
}

/* Title — animated gradient underline that draws left-to-right on hover */
.contact__item-title {
  display: inline;
  background-image: linear-gradient(var(--kletu-deep-red), var(--kletu-deep-red));
  background-size: 0% 2px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  padding-bottom: 4px;
  transition: background-size 0.55s var(--ease-out), color 0.3s var(--ease-out);
}
.contact__item:hover .contact__item-title {
  background-size: 100% 2px;
  color: var(--kletu-deep-red);
}

/* Tag — subtle rise on hover */
.contact__item-tag {
  transition: transform 0.4s var(--ease-out), color 0.3s var(--ease-out);
}
.contact__item:hover .contact__item-tag {
  transform: translateY(-1px);
  color: var(--kletu-slate);
}

/* CTA — ghost button with deep-red wipe-fill from left on hover */
.contact__item-cta {
  position: relative;
  overflow: hidden;
  background: transparent;
  color: var(--kletu-deep-red);
  border: 1.5px solid var(--kletu-deep-red);
  padding: 11px 22px;
  z-index: 0;
  isolation: isolate;
}

.contact__item-cta > span {
  position: relative;
  z-index: 1;
  transition: color 0.35s var(--ease-out);
}

.contact__item-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--kletu-deep-red);
  transform: translateX(-101%);
  transition: transform 0.45s var(--ease-out);
  z-index: 0;
}

.contact__item-cta::after {
  content: '\2192';
  position: relative;
  z-index: 1;
  margin-left: 2px;
  transition: transform 0.35s var(--ease-out), color 0.35s var(--ease-out);
  color: var(--kletu-deep-red);
}

.contact__item:hover .contact__item-cta::before,
.contact__item-cta:hover::before { transform: translateX(0); }

.contact__item:hover .contact__item-cta > span,
.contact__item-cta:hover > span { color: #fff; }

.contact__item:hover .contact__item-cta::after,
.contact__item-cta:hover::after {
  color: #fff;
  transform: translateX(4px);
}

/* Replace shared about-style black CTA override for contact */
.contact__item:hover .contact__item-cta {
  background: transparent;      /* keep wipe effect */
}

/* Mobile: compact layout, icon hidden for clarity */
@media (max-width: 720px) {
  .contact__list { gap: 0; }
  .contact__item {
    grid-template-columns: auto 1fr;
    grid-template-areas:
      "num body"
      ".   cta";
    padding-block: 22px;
    padding-inline: 1rem;
    row-gap: 12px;
    column-gap: 18px;
  }
  .contact__item-num   { grid-area: num; align-self: start; padding-top: 2px; }
  .contact__item-icon  { display: none; }
  .contact__item-body  { grid-area: body; }
  .contact__item-cta   { grid-area: cta; justify-self: start; }
  .contact__item::after { font-size: 7rem; bottom: -18px; right: -6px; }
}

@media (prefers-reduced-motion: reduce) {
  .contact__item,
  .contact__item::after,
  .contact__item-num,
  .contact__item-icon,
  .contact__item-title,
  .contact__item-tag,
  .contact__item-cta,
  .contact__item-cta::before,
  .contact__item-cta::after {
    transition: none !important;
  }
}


/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--text-primary);
  color: rgba(255, 255, 255, 0.65);
  padding: 64px 0 32px;
}

.footer__grid {
  display: grid;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 32px;
  }
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.footer__logo {
  height: 52px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  flex-shrink: 0;
}

.footer__brand-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--bg-white);
  letter-spacing: -0.02em;
}

.footer__tagline {
  font-size: 0.9375rem;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 4px;
  margin-bottom: 12px;
}

.footer__hierarchy {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: rgba(255, 255, 255, 0.3);
  letter-spacing: 0.02em;
}

.footer__col h4 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 16px;
}

.footer__col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__col a {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.2s var(--ease-out);
}

.footer__col a:hover {
  color: var(--bg-white);
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 24px;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer__ieee-note {
  font-size: 0.6875rem;
}


/* ============================================
   Ambient Background (subtle, decorative)
   ============================================ */
.about::before {
  content: '';
  position: absolute;
  top: 20%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(26, 111, 181, 0.03) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: ambient-float 25s ease-in-out infinite;
}

.about {
  position: relative;
  overflow: hidden;
}

@keyframes ambient-float {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(-30px, 20px); }
  66% { transform: translate(20px, -15px); }
}


/* ============================================
   Stagger delays for grid items
   ============================================ */
.about__list .reveal:nth-child(1) { transition-delay: 0ms; }
.about__list .reveal:nth-child(2) { transition-delay: 80ms; }
.about__list .reveal:nth-child(3) { transition-delay: 160ms; }
.about__list .reveal:nth-child(4) { transition-delay: 240ms; }

.contact__grid .reveal:nth-child(1) { transition-delay: 0ms; }
.contact__grid .reveal:nth-child(2) { transition-delay: 80ms; }
.contact__grid .reveal:nth-child(3) { transition-delay: 160ms; }
.contact__grid .reveal:nth-child(4) { transition-delay: 240ms; }

.hero__stats .reveal:nth-child(1) { transition-delay: 0ms; }
.hero__stats .reveal:nth-child(2) { transition-delay: 80ms; }
.hero__stats .reveal:nth-child(3) { transition-delay: 160ms; }


/* ============================================
   Selection styling
   ============================================ */
::selection {
  background: rgba(26, 111, 181, 0.12);
  color: var(--text-primary);
}


/* ============================================
   Scrollbar (subtle)
   ============================================ */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.12);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.2);
}