:root {
  --zt-bg: #020202;
  --zt-accent: #0D8A86;
  --zt-text: #ffffff;
  --zt-text-muted: #c4c4c4;
  --zt-font: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

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

html,
body {
  width: 100%;
  min-height: 100%;
}

body {
  font-family: var(--zt-font);
  background-color: var(--zt-bg);
  color: var(--zt-text);
  overflow-x: hidden;
}

/* Canvas background */

#bg-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: #020202;
}

/* Header */

.zt-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 10;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent);
  backdrop-filter: blur(10px);
}

.zt-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.zt-logo {
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.zt-logo span {
  color: var(--zt-accent);
}

/* nav: مخفي على الموبايل، يظهر من 768px وما فوق */

.zt-nav {
  display: none;
  gap: 24px;
}

.zt-nav a {
  font-size: 0.9rem;
  color: var(--zt-text-muted);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 500;
  transition: color 0.2s ease;
}

.zt-nav a:hover {
  color: var(--zt-accent);
}

/* Hero */

.zt-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 96px 16px 40px;
  text-align: center;
}

.zt-hero-inner {
  width: 100%;
  max-width: 820px;
}

.zt-eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--zt-accent);
  margin-bottom: 14px;
}

.zt-hero h1 {
  font-size: clamp(2.1rem, 6vw, 3.4rem);
  line-height: 1.1;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.zt-hero h1 span {
  color: var(--zt-accent);
}

.zt-subtitle {
  font-size: clamp(0.9rem, 1.2vw + 0.7rem, 1rem);
  color: var(--zt-text-muted);
  max-width: 640px;
  margin: 0 auto 20px;
}

/* Buttons */

.zt-actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 10px;
  margin-bottom: 16px;
}

.btn {
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: var(--zt-accent);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--zt-accent);
  border-color: var(--zt-accent);
}

.btn-outline {
  background-color: transparent;
  color: var(--zt-accent);
  border-color: var(--zt-accent);
}

.btn-outline:hover {
  background-color: var(--zt-accent);
  color: #ffffff;
}

/* Formula line */

.zt-formula {
  font-size: 0.8rem;
  color: var(--zt-text-muted);
  margin-top: 4px;
}

/* Sections */

.zt-section {
  padding: 64px 16px;
  max-width: 1200px;
  margin: 0 auto;
}

.zt-section-dark {
  background-color: #050505;
  border-top: 1px solid rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.zt-section-header {
  text-align: center;
  margin-bottom: 36px;
}

.zt-section-header h2 {
  font-size: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.zt-underline {
  width: 60px;
  height: 3px;
  margin: 10px auto 0;
  border-radius: 999px;
  background-color: var(--zt-accent);
}

/* Accordion (Why Zerix) */

.zt-strengths-accordion {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.zt-strength-item {
  border-radius: 14px;
  background-color: #050707;
  border: 1px solid rgba(13, 138, 134, 0.4);
  overflow: hidden;
  transition: border-color 0.18s ease, box-shadow 0.18s ease,
    background-color 0.18s ease;
}

.zt-strength-item.active {
  background: radial-gradient(
      circle at top left,
      rgba(13, 138, 134, 0.35),
      #050707
    );
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.85);
  border-color: var(--zt-accent);
}

.zt-strength-toggle {
  width: 100%;
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--zt-text);
}

.zt-strength-emoji {
  width: 30px;
  height: 30px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  background-color: rgba(2, 12, 12, 0.9);
  border: 1px solid rgba(13, 138, 134, 0.7);
}

.zt-strength-title {
  flex: 1;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.zt-strength-title strong {
  font-weight: 700;
}

.zt-strength-arrow {
  font-size: 0.9rem;
  transition: transform 0.18s ease;
}

.zt-strength-item.active .zt-strength-arrow {
  transform: rotate(180deg);
}

.zt-strength-panel {
  max-height: 0;
  overflow: hidden;
  padding: 0 14px;
  transition: max-height 0.25s ease, padding-bottom 0.25s ease;
}

.zt-strength-panel p {
  font-size: 0.86rem;
  color: var(--zt-text-muted);
  line-height: 1.6;
}

.zt-strength-panel p strong {
  color: var(--zt-text);
}

.zt-strength-item.active .zt-strength-panel {
  padding-bottom: 10px;
}

/* ABOUT */

.zt-about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: flex-start;
}

.zt-about-text p {
  color: var(--zt-text-muted);
  line-height: 1.7;
  margin-bottom: 10px;
  font-size: 0.93rem;
}

.zt-about-list {
  margin-top: 6px;
  list-style: none;
}

.zt-about-list li {
  position: relative;
  padding-left: 16px;
  color: var(--zt-text-muted);
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.zt-about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--zt-accent);
}

.zt-about-card {
  border-radius: 18px;
  padding: 22px 20px;
  background: radial-gradient(
      circle at top left,
      rgba(13, 138, 134, 0.35),
      rgba(0, 0, 0, 0.96)
    );
  border: 1px solid rgba(13, 138, 134, 0.6);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.8);
}

.zt-about-chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 11px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--zt-text-muted);
  margin-bottom: 8px;
}

.zt-about-card h3 {
  font-size: 1.15rem;
  margin-bottom: 6px;
}

.zt-about-card p {
  font-size: 0.9rem;
  color: var(--zt-text-muted);
}

/* TEAM – flip cards */

.zt-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  justify-items: center;
}

.zt-member-flip {
  width: 100%;
  max-width: 280px;
  perspective: 1200px;
}

.zt-member-flip-inner {
  position: relative;
  width: 100%;
  min-height: 360px;
  transform-style: preserve-3d;
  transition: transform 0.5s ease;
  cursor: pointer;
}

.zt-member-face {
  position: absolute;
  inset: 0;
  border-radius: 18px;
  overflow: hidden;
  background-color: #050505;
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.9);
  backface-visibility: hidden;
  display: flex;
  flex-direction: column;
}

/* front */

.zt-member-front .zt-member-photo img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.zt-member-front .zt-member-info {
  padding: 12px 14px 16px;
  text-align: center;
  border-top: 2px solid var(--zt-accent);
}

.zt-member-front .zt-role {
  font-size: 0.83rem;
  color: var(--zt-text-muted);
}

.zt-member-hint {
  font-size: 0.78rem;
  color: var(--zt-text-muted);
  margin-top: 4px;
}

/* back */

.zt-member-back {
  padding: 14px 14px 16px;
  transform: rotateY(180deg);
}

.zt-member-back h3 {
  margin-bottom: 2px;
}

.zt-member-back .zt-role {
  margin-bottom: 8px;
  font-size: 0.83rem;
}

.zt-stack-title {
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.zt-stack-list {
  list-style: none;
  margin-bottom: 8px;
}

.zt-stack-list li {
  font-size: 0.82rem;
  color: var(--zt-text-muted);
  margin-bottom: 4px;
  position: relative;
  padding-left: 12px;
}

.zt-stack-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.48em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--zt-accent);
}

.zt-stack-extra {
  font-size: 0.8rem;
  color: var(--zt-text-muted);
  margin-top: auto;
}

/* flip state */

.zt-member-flip.is-flipped .zt-member-flip-inner {
  transform: rotateY(180deg);
}

/* PARTNER / PACKS */

.zt-partner-grid,
.zt-partner-grid-flip {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
}

.zt-partner-flip {
  perspective: 1200px;
}

.zt-partner-flip-inner {
  position: relative;
  width: 100%;
  min-height: 260px;
  transform-style: preserve-3d;
  transition: transform 0.5s ease;
  cursor: pointer;
}

.zt-partner-face {
  position: absolute;
  inset: 0;
  border-radius: 18px;
  padding: 18px 18px 20px;
  background-color: #050505;
  border: 1px solid rgba(255, 255, 255, 0.05);
  backface-visibility: hidden;
  display: flex;
  flex-direction: column;
}

/* front */

.zt-partner-front {
  gap: 12px;
  align-items: center;
  justify-content: flex-start;
}

.zt-partner-logo-wrap {
  width: 84px;
  height: 84px;
  border-radius: 22px;
  background-color: #020202;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.zt-partner-logo-wrap img {
  width: 88%;
  height: 88%;
  object-fit: contain;
}

/* accent borders */

.ems-border {
  border: 2px solid #3abf3a;
}

.vel-border {
  border: 2px solid var(--zt-accent);
}

.zt-partner-name {
  font-size: 1.05rem;
  margin-top: 4px;
}

.zt-partner-hint {
  font-size: 0.78rem;
  color: var(--zt-text-muted);
}

/* back */

.zt-partner-back {
  transform: rotateY(180deg);
  align-items: flex-start;
}

.zt-partner-back h3 {
  margin-bottom: 4px;
}

.zt-partner-type {
  font-size: 0.86rem;
  color: var(--zt-text-muted);
  margin-bottom: 8px;
}

.zt-partner-features {
  list-style: none;
  margin-bottom: 8px;
}

.zt-partner-features li {
  font-size: 0.82rem;
  color: var(--zt-text-muted);
  margin-bottom: 4px;
  position: relative;
  padding-left: 12px;
}

.zt-partner-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--zt-accent);
}

.zt-partner-tagline {
  font-size: 0.8rem;
  color: var(--zt-accent);
  margin-top: auto;
}

/* flip behavior */

.zt-partner-flip.is-flipped .zt-partner-flip-inner {
  transform: rotateY(180deg);
}

/* FOOTER */

.zt-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 24px 16px 16px;
  margin-top: 36px;
}

.zt-footer-inner {
  max-width: 1200px;
  margin: 0 auto 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.zt-footer-logo {
  font-size: 1.05rem;
}

.zt-footer-text {
  font-size: 0.86rem;
  color: var(--zt-text-muted);
}

.zt-footer-actions {
  display: flex;
  gap: 8px;
}

.zt-footer-icon {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: #111111;
  color: var(--zt-text);
  text-decoration: none;
  font-size: 0.78rem;
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: border-color 0.2s ease, background-color 0.2s ease,
    color 0.2s ease;
}

.zt-footer-icon:hover {
  background-color: var(--zt-accent);
  border-color: var(--zt-accent);
  color: #ffffff;
}

.zt-footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
  font-size: 0.78rem;
  color: var(--zt-text-muted);
}

/* ====== BREAKPOINTS ====== */

/* تابلت ومطلع لابتوب */
@media (min-width: 768px) {
  .zt-container {
    padding: 16px 24px;
  }

  .zt-nav {
    display: flex;
  }

  .zt-hero {
    padding: 110px 24px 60px;
  }

  .zt-actions {
    flex-direction: row;
    justify-content: center;
    max-width: 420px;
    margin: 0 auto 18px;
  }

  .btn {
    flex: 1;
  }

  .zt-section {
    padding-inline: 24px;
    padding-block: 80px;
  }

  .zt-about-grid {
    grid-template-columns: minmax(0, 1.8fr) minmax(0, 1.2fr);
    gap: 32px;
  }

  .zt-team-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  }
}

/* شاشات أكبر (ديـسكـتوب) */
@media (min-width: 1024px) {
  .zt-container {
    max-width: 1200px;
  }

  .zt-section {
    max-width: 1200px;
  }

  .zt-hero h1 {
    font-size: clamp(2.6rem, 3.2vw, 3.6rem);
  }

  .zt-about-grid {
    gap: 40px;
  }
}
.zt-footer-icon {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: #111111;
  border: 1px solid rgba(255, 255, 255, 0.06);
  text-decoration: none;
  transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.zt-footer-icon img {
  width: 20px;
  height: 20px;
  object-fit: contain;
}

.zt-footer-icon:hover {
  background-color: var(--zt-accent);
  border-color: var(--zt-accent);
  transform: translateY(-1px);
}
.zt-footer-icon {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(17, 17, 17, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.06);
  text-decoration: none;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.zt-footer-icon img {
  width: 20px;
  height: 20px;
  object-fit: contain;
  transition: filter 0.2s ease, opacity 0.2s ease;
}

/* hover: الخلفية أفتح شوي، والأيقونة تصير أفتح/أوضح */
.zt-footer-icon:hover {
  background-color: rgba(13, 138, 134, 0.25); /* أفتح من لون الأيقونة */
  border-color: var(--zt-accent);
  transform: translateY(-1px);
}

.zt-footer-icon:hover img {
  filter: brightness(1.6); /* يفتح الأيقونة */
  opacity: 1;
}