/* ============================================================
   style.css — 6G Wireless Researcher resume
   Role: visual theme, layout, animations, responsive rules.
   Retheme by editing the custom properties in :root below.
   ============================================================ */

/* ---------- Color system (retheme here) ---------- */
:root {
  --navy-900: #050a18;
  --navy-800: #0a1228;
  --navy-700: #0f1b3a;
  --navy-600: #16264f;
  --cyan: #00f0ff;
  --cyan-soft: rgba(0, 240, 255, 0.15);
  --violet: #b14bff;
  --violet-soft: rgba(177, 75, 255, 0.18);
  --white: #f4f8ff;
  --muted: #9fb3d1;
  --overlay: rgba(5, 10, 24, 0.62);   /* dark layer over video */
  --glass: rgba(15, 27, 58, 0.42);
  --glass-border: rgba(0, 240, 255, 0.22);
  --font-body: 'Inter', system-ui, sans-serif;
  --font-head: 'Space Grotesk', system-ui, sans-serif;
  --maxw: 1200px;
  --radius: 14px;
  --bs-blue: #1e30f3;
  --bs-indigo: #6610f2;
  --bs-purple: #6f42c1;
  --bs-pink: #e21e80;
  --bs-red: #dc3545;
  --bs-orange: #fd7e14;
  --bs-yellow: #ffc107;
  --bs-green: #198754;
  --bs-teal: #20c997;
  --bs-cyan: #0dcaf0;
  --bs-black: #000;
  --bs-white: #fff;
  --bs-gray: #6c757d;
  --bs-gray-dark: #343a40;
  --bs-gray-100: #f8f9fa;
  --bs-gray-200: #e9ecef;
  --bs-gray-300: #dee2e6;
  --bs-gray-400: #ced4da;
  --bs-gray-500: #adb5bd;
  --bs-gray-600: #6c757d;
  --bs-gray-700: #495057;
  --bs-gray-800: #343a40;
  --bs-gray-900: #212529;
  --bs-primary: #1e30f3;
  --bs-secondary: #e21e80;
  --bs-success: #198754;
  --bs-info: #0dcaf0;
  --bs-warning: #ffc107;
  --bs-danger: #dc3545;
  --bs-light: #f8f9fa;
  --bs-dark: #212529;
  --bs-primary-rgb: 30, 48, 243;
  --bs-secondary-rgb: 226, 30, 128;
  --bs-success-rgb: 25, 135, 84;
  --bs-info-rgb: 13, 202, 240;
  --bs-warning-rgb: 255, 193, 7;
  --bs-danger-rgb: 220, 53, 69;
  --bs-light-rgb: 248, 249, 250;
  --bs-dark-rgb: 33, 37, 41;
  --bs-white-rgb: 255, 255, 255;
  --bs-black-rgb: 0, 0, 0;
  --bs-body-color-rgb: 33, 37, 41;
  --bs-body-bg-rgb: 255, 255, 255;
  --bs-font-sans-serif: "Plus Jakarta Sans";
  --bs-font-monospace: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --bs-gradient: linear-gradient(180deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0));
  --bs-body-font-family: var(--bs-font-sans-serif);
  --bs-body-font-size: 1rem;
  --bs-body-font-weight: 400;
  --bs-body-line-height: 1.5;
  --bs-body-color: #212529;
  --bs-body-bg: #fff;
  --bs-border-width: 1px;
  --bs-border-style: solid;
  --bs-border-color: #dee2e6;
  --bs-border-color-translucent: rgba(0, 0, 0, 0.175);
  --bs-border-radius: 0.375rem;
  --bs-border-radius-sm: 0.25rem;
  --bs-border-radius-lg: 0.5rem;
  --bs-border-radius-xl: 1rem;
  --bs-border-radius-2xl: 2rem;
  --bs-border-radius-pill: 50rem;
  --bs-link-color: #1e30f3;
  --bs-link-hover-color: #1826c2;
  --bs-code-color: #e21e80;
  --bs-highlight-bg: #fff3cd;
}

/* ---------- Reset ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font-body);
  color: var(--white);
  line-height: 1.6;
  background: var(--navy-900); /* fallback if video missing */
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { display: block; max-width: 100%; }

/* ============================================================
   BACKGROUND LAYER
   video + overlay + canvas particle mesh.
   The body bg gradient acts as fallback if the video 404s.
   ============================================================ */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(circle at 20% 30%, var(--navy-600), transparent 55%),
    radial-gradient(circle at 80% 70%, rgba(177,75,255,0.18), transparent 50%),
    linear-gradient(160deg, var(--navy-900), var(--navy-800));
}
.bg-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}
.bg-overlay {
  position: absolute;
  inset: 0;
  background: var(--overlay);
}
#particle-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  transition: background .35s ease, backdrop-filter .35s ease, box-shadow .35s ease;
}
.navbar.scrolled {
  background: rgba(5, 10, 24, 0.72);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--glass-border);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: 1px;
  color: var(--white);
}
.brand-dot { color: var(--cyan); }
.nav-links {
  display: flex;
  /*flex-wrap: wrap;*/
  gap: clamp(10px, 1.2vw, 24px);
}
.nav-links a {
  font-size: .95rem;
  color: var(--muted);
  position: relative;
  padding: 4px 0;
  transition: color .25s ease;
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--cyan);
  transition: width .3s ease;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
}
.nav-links a.active::after,
.nav-links a:hover::after { width: 100%; }

/* hamburger (mobile) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 24px; height: 2px;
  background: var(--white);
  transition: transform .3s ease, opacity .3s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   LAYOUT HELPERS
   ============================================================ */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 110px 24px 70px;
}
.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  margin-bottom: 36px;
  letter-spacing: .5px;
}
.title-hash { color: var(--cyan); margin-right: 6px; }

/* frosted-glass card used by About, Education, Contact */
.glass-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 8px 40px rgba(0,0,0,0.35);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 90px;
}
.hero-content { display: flex; flex-direction: column; align-items: center; }

/* profile image with pulsing signal rings */
.profile-wrap {
  position: relative;
  width: 380px; height: 380px;
  margin-bottom: 28px;
  display: grid;
  place-items: center;
}
.profile-img {
  width: 360px; height: 360px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--cyan);
  box-shadow: 0 0 22px var(--cyan-soft);
  position: relative;
  z-index: 2;
  background: var(--navy-700);
}
.profile-wrap.no-img .profile-img { display: none; }
.profile-wrap.no-img::before {
  content: 'AR';
  width: 160px; height: 160px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--font-head);
  font-size: 3rem;
  color: var(--cyan);
  background: var(--navy-700);
  border: 2px solid var(--cyan);
  z-index: 2;
}
/* two expanding rings staggered for a continuous pulse */
.pulse-ring {
  position: absolute;
  width: 360px; height: 360px;
  border-radius: 50%;
  border: 2px solid var(--cyan);
  opacity: 0;
  animation: pulse 3s ease-out infinite;
  z-index: 1;
}
.pulse-ring.delay { animation-delay: 1.5s; }
@keyframes pulse {
  0%   { transform: scale(1);   opacity: .7; }
  100% { transform: scale(1.9); opacity: 0; }
}

.hero-name {
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  font-weight: 700;
  letter-spacing: 1px;
  background: linear-gradient(90deg, var(--white), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-title {
  font-size: clamp(1rem, 3vw, 1.4rem);
  color: var(--cyan);
  margin-top: 8px;
  font-weight: 600;
}
.hero-inst {
  color: var(--muted);
  margin-top: 10px;
  font-size: 1.2rem;
}
.hero-inst i { color: var(--violet); margin-right: 6px; }
.hero-cta {
  margin-top: 30px;
  display: inline-block;
  padding: 12px 30px;
  border: 1px solid var(--cyan);
  border-radius: 50px;
  color: var(--cyan);
  font-weight: 600;
  transition: background .3s ease, box-shadow .3s ease, color .3s ease;
}
.hero-cta:hover {
  background: var(--cyan);
  color: var(--navy-900);
  box-shadow: 0 0 24px var(--cyan-soft);
}

/* scroll-down cue */
.scroll-cue { margin-top: 50px; }
.mouse {
  display: block;
  width: 26px; height: 44px;
  border: 2px solid var(--muted);
  border-radius: 14px;
  position: relative;
}
.wheel {
  position: absolute;
  top: 8px; left: 50%;
  width: 4px; height: 8px;
  margin-left: -2px;
  background: var(--cyan);
  border-radius: 2px;
  animation: wheel 1.6s ease-in-out infinite;
}
@keyframes wheel {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(14px); }
}

/* Floating About Button (Ring Style) */
.floating-about-btn {
    position: fixed;
    bottom: 25px;
    right: 25px;

    width: 55px;
    height: 55px;

    display: flex;
    justify-content: center;
    align-items: center;

    background: transparent;          /* Hollow */
    border: 2px solid var(--cyan);    /* Ring */
    border-radius: 50%;

    color: var(--cyan);
    font-size: 28px;
    font-weight: bold;
    text-decoration: none;

    box-shadow: 0 0 10px rgba(0, 255, 255, 0.25);
    z-index: 1000;

    transition: all 0.3s ease;
}

.floating-about-btn:hover {
    background: var(--cyan);  /* Fill on hover */
    color: #000;
    transform: scale(1.1);
}

.arrow {
    display: inline-block;
    animation: arrowUp 1.5s ease-in-out infinite;
}

@keyframes arrowUp {
    0% {
        transform: translateY(4px);
        opacity: 0.4;
    }
    50% {
        transform: translateY(-6px);
        opacity: 1;
    }
    100% {
        transform: translateY(4px);
        opacity: 0.4;
    }
}
/* ============================================================
   ABOUT
   ============================================================ */
.about-card { padding: 32px 36px; }
.about-card p + p { margin-top: 16px; }

/* ============================================================
   RESEARCH INTERESTS — tag grid
   ============================================================ */
.tag-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 18px;
}
.tag {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 20px;
  border-radius: var(--radius);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-weight: 600;
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.tag i {
  font-size: 1.4rem;
  color: var(--cyan);
  filter: drop-shadow(0 0 6px var(--cyan-soft));
}
.tag:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
  box-shadow: 0 8px 30px rgba(0,240,255,0.18);
}

/* ============================================================
   PUBLICATIONS
   ============================================================ */
.pub-list { display: flex; flex-direction: column; gap: 18px; }
.pub-item {
  display: flex;
  align-items: stretch;
  gap: 0;
  border-radius: var(--radius);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  overflow: hidden;
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.pub-item:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
  box-shadow: 0 10px 36px rgba(0,240,255,0.16);
}

/* system-model figure on the left */
.pub-figure {
  flex-shrink: 0;
  width: 200px;
  position: relative;
  background: var(--navy-700);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.pub-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.pub-item:hover .pub-figure img { transform: scale(1.05); }
/* fallback icon shown when image is missing */
.pub-figure-fallback {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 2.4rem;
  color: var(--cyan);
  opacity: .35;
  pointer-events: none;
}
.pub-figure.no-img img { display: none; }

/* text + DOI on the right */
.pub-body {
  flex: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 22px 26px;
  min-width: 0;
}
.pub-main h3 { font-size: 1.05rem; font-weight: 600; }
.pub-meta { color: var(--muted); font-size: .88rem; margin-top: 6px; }
.pub-doi {
  flex-shrink: 0;
  color: var(--cyan);
  font-weight: 600;
  font-size: .9rem;
  white-space: nowrap;
  border: 1px solid var(--cyan);
  padding: 6px 14px;
  border-radius: 50px;
  transition: background .3s ease, color .3s ease;
}
.pub-doi:hover { background: var(--cyan); color: var(--navy-900); }
.pub-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
/* ============================================================
   EDUCATION — timeline
   ============================================================ */
.timeline { position: relative; padding-left: 34px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 8px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(var(--cyan), var(--violet));
}
.tl-item { position: relative; margin-bottom: 26px; }
.tl-dot {
  position: absolute;
  left: -34px; top: 22px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--navy-900);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 10px var(--cyan-soft);
}
.tl-card { padding: 22px 26px; }
.tl-year {
  display: inline-block;
  font-size: .82rem;
  color: var(--cyan);
  font-weight: 600;
  letter-spacing: .5px;
  margin-bottom: 6px;
}
.tl-card h3 { font-size: 1.1rem; margin-bottom: 6px; }
.tl-card p { color: var(--muted); font-size: .92rem; }

/* ============================================================
   SKILLS — animated bars
   ============================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px 40px;
}
.skill-head {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: .92rem;
  font-weight: 600;
}
.skill-pct { color: var(--cyan); }
.bar {
  height: 8px;
  border-radius: 50px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  width: 0;
  border-radius: 50px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  box-shadow: 0 0 12px var(--cyan-soft);
  transition: width 1.4s cubic-bezier(.2,.8,.2,1);
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(174px, 1fr));
  gap: 18px;
}
.contact-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  font-weight: 600;
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.contact-link i {
  font-size: 1.5rem;
  color: var(--cyan);
  filter: drop-shadow(0 0 6px var(--cyan-soft));
}
.contact-link:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
  box-shadow: 0 8px 30px rgba(0,240,255,0.18);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  text-align: center;
  padding: 40px 24px 60px;
  color: var(--muted);
  font-size: .88rem;
  border-top: 1px solid var(--glass-border);
  max-width: var(--maxw);
  margin: 40px auto 0;
}

/* ============================================================
   SCROLL REVEAL (IntersectionObserver toggles .visible)
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity .8s ease, transform .8s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE — mobile-first overrides
   ============================================================ */
@media (max-width: 760px) {
  .nav-links {
    position: fixed;
    top: 0; right: 0;
    height: 100vh;
    width: min(70vw, 280px);
    flex-direction: column;
    justify-content: center;
    gap: 32px;
    background: rgba(5,10,24,0.95);
    backdrop-filter: blur(16px);
    transform: translateX(100%);
    transition: transform .35s ease;
    padding: 40px;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-toggle { display: flex; }

  .skills-grid { grid-template-columns: 1fr; }
  .pub-item { flex-direction: column; }
  .pub-figure { width: 100%; height: 160px; }
  .pub-body { flex-direction: column; align-items: flex-start; }
  .pub-doi { align-self: flex-end; }
  .section { padding: 90px 20px 60px; }
}

@media (max-width: 420px) {
  .profile-wrap, .profile-img { width: 140px; height: 140px; }
  .profile-wrap.no-img::before { width: 140px; height: 140px; font-size: 2.4rem; }
  .pulse-ring { width: 140px; height: 140px; }
}

/* respect reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}
/* ============================================================
   Keywords for Publications
   ============================================================ */
.pub-tags {
    margin-top: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    padding: 4px 10px;
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 600;
    color: white;
}

/* 6 fixed colors */
.c1 { background: #1f77b4; }  /* blue */
.c2 { background: #d62728; }  /* red */
.c3 { background: #2ca02c; }  /* green */
.c4 { background: #9467bd; }  /* purple */
.c5 { background: #ff7f0e; }  /* orange */
.c6 { background: #17becf; }  /* cyan */


/* text formateting */
.text-primary {
  --bs-text-opacity: 1;
  color: rgba(var(--bs-primary-rgb), var(--bs-text-opacity)) !important;
}

.text-secondary {
  --bs-text-opacity: 1;
  color: rgba(var(--bs-secondary-rgb), var(--bs-text-opacity)) !important;
}

.text-success {
  --bs-text-opacity: 1;
  color: rgba(var(--bs-success-rgb), var(--bs-text-opacity)) !important;
}

.text-info {
  --bs-text-opacity: 1;
  color: rgba(var(--bs-info-rgb), var(--bs-text-opacity)) !important;
}

.text-warning {
  --bs-text-opacity: 1;
  color: rgba(var(--bs-warning-rgb), var(--bs-text-opacity)) !important;
}

.text-danger {
  --bs-text-opacity: 1;
  color: rgba(var(--bs-danger-rgb), var(--bs-text-opacity)) !important;
}

.text-light {
  --bs-text-opacity: 1;
  color: rgba(var(--bs-light-rgb), var(--bs-text-opacity)) !important;
}

.text-dark {
  --bs-text-opacity: 1;
  color: rgba(var(--bs-dark-rgb), var(--bs-text-opacity)) !important;
}

.text-black {
  --bs-text-opacity: 1;
  color: rgba(var(--bs-black-rgb), var(--bs-text-opacity)) !important;
}

.text-white {
  --bs-text-opacity: 1;
  color: rgba(var(--bs-white-rgb), var(--bs-text-opacity)) !important;
}

.text-body {
  --bs-text-opacity: 1;
  color: rgba(var(--bs-body-color-rgb), var(--bs-text-opacity)) !important;
}

.text-muted {
  --bs-text-opacity: 1;
  color: #6c757d !important;
}

.text-black-50 {
  --bs-text-opacity: 1;
  color: rgba(0, 0, 0, 0.5) !important;
}

.text-white-50 {
  --bs-text-opacity: 1;
  color: rgba(255, 255, 255, 0.5) !important;
}

.text-reset {
  --bs-text-opacity: 1;
  color: inherit !important;
}

@media (min-width: 1200px) {
  .fs-1 {
    font-size: 2.5rem !important;
  }
  .fs-2 {
    font-size: 2rem !important;
  }
  .fs-3 {
    font-size: 1.75rem !important;
  }
  .fs-4 {
    font-size: 1.5rem !important;
  }
  .fs-5 {
    font-size: 1rem !important;
  }
}
.fw-light {
  font-weight: 200 !important;
}

.fw-lighter {
  font-weight: lighter !important;
}

.fw-normal {
  font-weight: 400 !important;
}

.fw-bold {
  font-weight: 700 !important;
}

.fw-semibold {
  font-weight: 600 !important;
}

.fw-bolder {
  font-weight: bolder !important;
}
.inline-text {
display: inline;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-logo {
    height: 1.5em;
    width: auto;
}

/* ============================================================
   SPEAKERS
   ============================================================ */

.speaker-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.speaker-card {
    padding: 28px 22px;
    text-align: center;
    transition: transform .3s ease,
                border-color .3s ease,
                box-shadow .3s ease;
}

.speaker-card:hover {
    transform: translateY(-6px);
    border-color: var(--cyan);
    box-shadow: 0 10px 35px rgba(0,240,255,.18);
}

.speaker-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(0,240,255,.08);
    border: 1px solid var(--glass-border);
}

.speaker-icon i {
    font-size: 1.8rem;
    color: var(--cyan);
}

.speaker-card h3 {
    font-family: var(--font-head);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 10px;
}

.speaker-card p {
    color: var(--muted);
    font-size: .95rem;
    margin: 0;
}

.speaker-members {
    list-style: none;
    padding: 0;
    margin: 15px 0 0;
}

.speaker-members li {
    color: var(--white);
    margin: 6px 0;
    font-size: 0.95rem;
}

.speaker-members li:not(:last-child) {
    border-bottom: 1px solid rgba(255,255,255,0.08);
    padding-bottom: 6px;
}

.footer p {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    margin: 0;
}

.footer-logo {
    display: inline-block;
    height: 30px;
    width: auto;
}

/* ============================================================
   SKILLS
   ============================================================ */

.skills-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.skill-card {
    padding: 28px 22px;
    text-align: center;
    transition: transform .3s ease,
                border-color .3s ease,
                box-shadow .3s ease;
}

.skill-card:hover {
    transform: translateY(-6px);
    border-color: var(--cyan);
    box-shadow: 0 10px 35px rgba(0,240,255,.18);
}

.skill-card i {
    font-size: 2rem;
    color: var(--cyan);
    margin-bottom: 18px;
}

.skill-card h3 {
    font-family: var(--font-head);
    font-size: 1.15rem;
    color: var(--white);
    margin-bottom: 10px;
}

.skill-card p {
    color: var(--muted);
    font-size: .92rem;
    line-height: 1.5;
}