/* ==========================================================================
   TechDRIVE — matched to EOI section screenshots
   Cyan #01a0c6 · Navy #19378e · Orange #ff6700 · Black #000
   ========================================================================== */

:root {
  --td-cyan: #01a0c6;
  --td-cyan-hover: #01b4df;
  --td-cyan-border: #01627a;
  --td-navy: #19378e;
  --td-nav-bg: #0a3550;
  --td-black: #000000;
  --td-orange: #ff6700;
  --td-orange-hover: #ff761a;
  --td-orange-border: #b34800;
  --td-white: #ffffff;
  --td-maxw: 1000px;
  --td-header-h: 52px;
  --td-fb: #3060a3;
  --td-li: #007fbe;
  --td-yt: #f00a09;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--td-header-h);
}

body {
  margin: 0;
  font-family: 'Barlow', 'IBM Plex Sans', system-ui, sans-serif;
  font-weight: 400;
  color: var(--td-white);
  background: var(--td-black);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: var(--td-cyan);
  text-decoration: none;
}

b,
strong {
  font-weight: 700;
}

.screen-reader-text {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.td-skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  background: var(--td-orange);
  color: #fff;
  padding: 10px 16px;
}
.td-skip-link:focus {
  left: 8px;
  top: 8px;
}

.td-container {
  width: 100%;
  max-width: var(--td-maxw);
  margin: 0 auto;
  padding: 0 20px;
}

.td-heading {
  font-family: 'Barlow Semi Condensed', 'Barlow', sans-serif;
  font-weight: 700;
  font-size: clamp(1.75rem, 3.6vw, 2.55rem);
  line-height: 1.15;
  margin: 0 0 1.1rem;
}
.td-heading--center {
  text-align: center;
}
.td-accent { color: var(--td-cyan); }
.td-white { color: var(--td-white); }
.td-black { color: var(--td-black); }

/* ---------- Buttons ---------- */
.td-btn {
  display: inline-block;
  font-family: 'Barlow Semi Condensed', 'Barlow', sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 1px;
  padding: 0.8rem 1.75rem;
  text-transform: uppercase;
  color: #fff;
  background: var(--td-cyan);
  border: 1px solid var(--td-cyan-border);
  border-bottom-width: 4px;
  border-radius: 500px;
  transition: background 0.15s ease, transform 0.1s ease;
  cursor: pointer;
  text-align: center;
  line-height: 1.2;
}
.td-btn:hover {
  background: var(--td-cyan-hover);
  color: #fff;
}
.td-btn:active {
  border-bottom-width: 1px;
  transform: translateY(2px);
}
.td-btn--pill { border-radius: 500px; }
.td-btn--cyan {
  background: var(--td-cyan);
  border-color: var(--td-cyan-border);
}
.td-btn--cyan:hover { background: var(--td-cyan-hover); }
.td-btn--orange {
  background: var(--td-orange);
  border-color: var(--td-orange-border);
}
.td-btn--orange:hover { background: var(--td-orange-hover); }
.td-btn--lg {
  font-size: 1.1rem;
  padding: 0.9rem 2rem;
}

/* ==========================================================================
   HEADER — centered nav + brand gradient bar
   ========================================================================== */
.td-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: rgb(25, 55, 142);
  background-image: linear-gradient(90deg, rgb(25, 55, 142) 0%, rgb(1, 160, 198) 100%);
}
.td-header__inner {
  max-width: 1100px;
  margin: 0 auto;
  min-height: var(--td-header-h);
  padding: 6px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.td-nav__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 26px;
  margin: 0;
  padding: 0;
  align-items: center;
}
.td-nav__link,
.td-nav .menu-item a {
  color: var(--td-white);
  font-family: 'Barlow', sans-serif;
  font-weight: 400;
  font-size: 1rem;
  letter-spacing: 0.02em;
  transition: color 0.15s ease;
}
.td-nav__link:hover,
.td-nav .menu-item a:hover,
.td-nav .current-menu-item > a,
.td-nav .current_page_item > a {
  color: var(--td-white);
  font-weight: 600;
}

.td-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: 8px;
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
}
.td-nav-toggle__bar {
  display: block;
  height: 3px;
  width: 100%;
  background: var(--td-white);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}
.td-nav-toggle[aria-expanded="true"] .td-nav-toggle__bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.td-nav-toggle[aria-expanded="true"] .td-nav-toggle__bar:nth-child(2) {
  opacity: 0;
}
.td-nav-toggle[aria-expanded="true"] .td-nav-toggle__bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ==========================================================================
   HERO — full-bleed muted looping YouTube
   ========================================================================== */
.td-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #000;
}
.td-hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.td-hero__bg > div {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.td-hero__bg iframe {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100vw;
  height: 56.25vw;
  min-height: 100vh;
  min-width: 177.78vh;
  transform: translate(-50%, -50%);
  border: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 1s ease;
}
.td-hero__bg.is-playing iframe {
  opacity: 1;
}
.td-hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: rgba(0, 0, 0, 0.45);
  pointer-events: none;
}
.td-hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 70px 24px 40px;
  pointer-events: none;
}
.td-hero__logo {
  width: min(520px, 78vw);
  height: auto;
  margin: 0 auto;
  filter: drop-shadow(0 4px 24px rgba(0, 0, 0, 0.55));
}

/* ==========================================================================
   ABOUT
   ========================================================================== */
.td-about {
  padding: 64px 0 40px;
  background: #000;
  border-bottom: 4px solid transparent;
  border-image: linear-gradient(90deg, #19378e 0%, #01a0c6 100%) 1;
}
.td-about__body {
  max-width: 820px;
  margin: 0 auto 2rem;
  text-align: center;
}
.td-about__body p {
  font-size: 1.05rem;
  color: var(--td-white);
  margin: 0 0 1rem;
}
.td-about__media {
  margin: 0 auto 1.25rem;
  max-width: 960px;
}
.td-about__media img,
.td-about__features img {
  width: 100%;
  margin: 0 auto;
}
.td-about__features {
  margin: 1.25rem auto 0;
  max-width: 920px;
}

/* ==========================================================================
   UPCOMING EVENTS
   ========================================================================== */
.td-events {
  padding: 70px 0 60px;
  background-color: rgb(25, 55, 142);
  background-image: linear-gradient(90deg, rgb(25, 55, 142) 0%, rgb(1, 160, 198) 100%);
}
.td-events .td-container {
  max-width: 1100px;
}
.td-events--repeat {
  background-color: rgb(25, 55, 142);
  background-image: linear-gradient(90deg, rgb(25, 55, 142) 0%, rgb(1, 160, 198) 100%);
  padding: 56px 0;
}
.td-events__title {
  color: #000;
  margin-bottom: 2rem;
  font-size: clamp(1.85rem, 3.8vw, 2.75rem);
}
.td-events__title .td-events__title-lead {
  color: #fff;
}
.td-events__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px 40px;
  max-width: 920px;
  width: 100%;
  margin: 0 auto;
  align-items: start;
}
.td-event {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  width: 100%;
}
.td-event-card {
  width: 100%;
  max-width: 440px;
  background: #000;
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}
.td-event-card__img {
  width: 100%;
  display: block;
  height: auto;
}
.td-event .td-btn {
  width: 80%;
  max-width: 340px;
  font-size: 1.35rem;
  padding: 0.85rem 1.5rem;
}
.td-events__banner {
  text-align: center;
  margin-top: 2.25rem;
}
.td-events__banner p {
  font-family: 'Barlow Semi Condensed', sans-serif;
  font-weight: 700;
  font-size: clamp(1.55rem, 3.4vw, 2.5rem);
  color: #fff;
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ==========================================================================
   PARTNER CTA
   ========================================================================== */
.td-partner-cta {
  padding: 70px 0;
  background: #000;
  text-align: center;
  border-top: 3px solid transparent;
  border-image: linear-gradient(90deg, #19378e 0%, #01a0c6 100%) 1;
}
.td-partner-cta__inner {
  max-width: 720px;
}
.td-partner-cta__body {
  margin: 0 auto 1.75rem;
  max-width: 560px;
}
.td-partner-cta__body p {
  font-size: 1.08rem;
  color: var(--td-white);
  margin: 0 0 0.35rem;
}

/* ==========================================================================
   PARTNERS GRID
   ========================================================================== */
.td-partners {
  padding: 64px 0 72px;
  background: #fff;
}
.td-partners__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px 16px;
  align-items: center;
  margin-top: 2rem;
}
.td-partners__item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  min-height: 96px;
}
.td-partners__item:hover { opacity: 0.85; }
.td-partners__item img {
  max-height: 72px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
}

/* ==========================================================================
   PREVIOUS EVENTS
   ========================================================================== */
.td-previous {
  padding: 64px 0 48px;
  background: #000;
}
.td-videos {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 1.5rem;
}
.td-video { margin: 0; }
.td-video__title {
  text-align: center;
  margin: 0 0 10px;
  font-family: 'Barlow Semi Condensed', sans-serif;
  font-weight: 600;
  font-size: 1.15rem;
}
.td-video__frame {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: 2px;
  overflow: hidden;
  background-size: cover;
  background-position: center;
  cursor: pointer;
  background-color: #111;
}
.td-yt-facade::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.12);
}
.td-yt-facade__play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 68px;
  height: 48px;
  background: #f00;
  border-radius: 12px / 10px;
  z-index: 2;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.45);
}
.td-yt-facade__play::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-40%, -50%);
  border-style: solid;
  border-width: 10px 0 10px 16px;
  border-color: transparent transparent transparent #fff;
}
.td-yt-facade:hover .td-yt-facade__play {
  transform: translate(-50%, -50%) scale(1.06);
}
.td-video__frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.td-venue-archive {
  margin-top: 2.25rem;
}
.td-venue-archive img {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
}

/* ==========================================================================
   FAQs — white questions, cyan heading/email, cyan rules
   ========================================================================== */
.td-faqs {
  padding: 56px 0 64px;
  background: #000;
  border-top: 1px solid var(--td-cyan);
  border-bottom: 1px solid var(--td-cyan);
}
.td-faqs__list {
  max-width: 720px;
  margin: 1.25rem auto 0;
  text-align: center;
}
.td-faq {
  margin-bottom: 1.6rem;
}
.td-faq__q {
  font-family: 'Barlow Semi Condensed', sans-serif;
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--td-white);
  margin: 0 0 8px;
}
.td-faq__a {
  color: var(--td-white);
  font-size: 1.02rem;
  margin: 0;
  line-height: 1.5;
}
.td-faq__email {
  color: var(--td-cyan);
  margin-top: 0.5rem;
  font-style: normal;
  font-weight: 600;
}
.td-faq__email a {
  color: var(--td-cyan);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.td-footer {
  background: #000;
  padding: 48px 0 36px;
}
.td-footer__inner {
  max-width: var(--td-maxw);
  margin: 0 auto;
  padding: 0 20px;
  text-align: center;
}
.td-footer__heading {
  font-family: 'Barlow Semi Condensed', sans-serif;
  font-weight: 700;
  font-size: 1.55rem;
  color: #fff;
  margin: 0 0 16px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.td-footer__social {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-bottom: 28px;
}
.td-social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  color: #fff;
  transition: opacity 0.15s ease, transform 0.15s ease;
}
.td-social-link:hover {
  opacity: 0.88;
  transform: translateY(-2px);
  color: #fff;
}
.td-social-link--facebook { background: var(--td-fb); }
.td-social-link--linkedin { background: var(--td-li); }
.td-social-link--youtube { background: var(--td-yt); }

.td-footer__brand img {
  height: auto;
  width: min(280px, 70vw);
  margin: 0 auto 18px;
}
.td-footer__legal {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.82rem;
  max-width: 560px;
  margin: 0 auto 12px;
  line-height: 1.45;
}
.td-footer__copyright {
  color: var(--td-cyan);
  font-weight: 600;
  font-size: 0.95rem;
  margin: 0;
}

/* ==========================================================================
   GENERIC PAGES
   ========================================================================== */
.td-page {
  padding: calc(var(--td-header-h) + 40px) 0 60px;
}
.td-page__inner {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
}
.td-article__title {
  font-family: 'Barlow Semi Condensed', sans-serif;
  color: var(--td-white);
}
.td-article__content { color: rgba(255, 255, 255, 0.85); }
.td-article__content a { color: var(--td-cyan); }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 980px) {
  .td-partners__grid { grid-template-columns: repeat(4, 1fr); }
  .td-videos { grid-template-columns: 1fr; max-width: 560px; margin-left: auto; margin-right: auto; }
}

@media (max-width: 767px) {
  .td-nav-toggle { display: flex; }
  .td-header__inner {
    justify-content: flex-end;
    min-height: 52px;
  }
  .td-nav {
    position: fixed;
    top: var(--td-header-h);
    left: 0;
    right: 0;
    background: rgba(10, 53, 80, 0.98);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    width: 100%;
  }
  .td-nav.is-open { max-height: 80vh; }
  .td-nav__list {
    flex-direction: column;
    gap: 0;
    padding: 10px 0;
  }
  .td-nav__item,
  .td-nav .menu-item {
    width: 100%;
    text-align: center;
  }
  .td-nav__link,
  .td-nav .menu-item a {
    display: block;
    padding: 14px 20px;
    font-size: 1.1rem;
  }

  .td-hero { min-height: 78vh; }
  .td-events__grid {
    grid-template-columns: 1fr;
    max-width: 440px;
    gap: 28px;
  }
  .td-event-card {
    max-width: none;
  }
  .td-partners__grid { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .td-partners__item { min-height: 80px; padding: 8px; }
  .td-partners__item img { max-height: 56px; }
  .td-about,
  .td-events,
  .td-partner-cta,
  .td-partners,
  .td-previous,
  .td-faqs {
    padding: 48px 0;
  }
}

@media (max-width: 480px) {
  .td-partners__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}