/* ============================================
   NOVA AI ACADEMY — DESIGN SYSTEM
   ============================================ */
:root {
  --accent: #00f0ff;
  --accent-glow: rgba(0, 240, 255, 0.4);
  --accent-dim: rgba(0, 240, 255, 0.1);
  --bg-deep: #020617;
  --bg-dark: #0b132b;
  --bg-panel: rgba(15, 23, 42, 0.6);
  --text: #f0f9ff;
  --text-muted: #94a3b8;
  --font-display: 'Exo 2', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ============================================
   RESET & BASE
   ============================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-deep);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ============================================
   TYPOGRAPHY & UTILITIES
   ============================================ */
h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  font-weight: 600;
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

.glass {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(0, 240, 255, 0.08);
  border-radius: 1rem;
  transition: var(--transition);
}

.glass:hover {
  border-color: rgba(0, 240, 255, 0.25);
  box-shadow: 0 0 40px rgba(0, 240, 255, 0.06);
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.25rem 0;
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(2, 6, 23, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 240, 255, 0.08);
  padding: 0.75rem 0;
}

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

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.logo__icon {
  color: var(--accent);
  font-size: 1.75rem;
  line-height: 1;
  text-shadow: 0 0 15px var(--accent-glow);
}

.logo__accent {
  color: var(--accent);
  font-weight: 300;
}

.nav__list {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav__link {
  position: relative;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: var(--transition);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
  transition: var(--transition);
}

.nav__link:hover {
  color: var(--text);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
  z-index: 1001;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: var(--transition);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  border-radius: 0.5rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(0, 240, 255, 0.05));
  color: var(--accent);
  border: 1px solid rgba(0, 240, 255, 0.3);
}

.btn--primary:hover {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.3), rgba(0, 240, 255, 0.1));
  box-shadow: 0 0 30px var(--accent-dim);
  transform: translateY(-2px);
}

.btn--glow::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: linear-gradient(135deg, var(--accent), transparent, var(--accent));
  border-radius: inherit;
  opacity: 0;
  z-index: -1;
  transition: opacity 0.3s ease;
}

.btn--glow:hover::before {
  opacity: 0.4;
}

.btn__icon {
  width: 1.25rem;
  height: 1.25rem;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

.btn--full {
  width: 100%;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: radial-gradient(ellipse at bottom, #0b1d2e 0%, #020617 60%);
}

.hero__canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(2, 6, 23, 0.2) 0%, rgba(2, 6, 23, 0.95) 100%);
  z-index: 2;
}

.hero__content {
  position: relative;
  z-index: 3;
  max-width: 800px;
  padding-top: 6rem;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: 2rem;
  background: rgba(0, 240, 255, 0.05);
  animation: fadeInDown 1s ease-out both;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  color: var(--text);
  min-height: 1.2em;
}

.typing-cursor {
  display: inline-block;
  width: 3px;
  height: 0.9em;
  background: var(--accent);
  margin-left: 4px;
  animation: blink 1s step-end infinite;
  vertical-align: middle;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero__scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  opacity: 0.6;
}

.scroll__text {
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--text-muted);
}

.scroll__line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* ============================================
   SECTION COMMON STYLES
   ============================================ */
.section {
  padding: 7rem 0;
  position: relative;
}

.section__header {
  margin-bottom: 4rem;
  max-width: 640px;
}

.section__label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.about__card {
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.about__card h3 {
  font-size: 1.25rem;
  color: var(--text);
}

.about__card p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.about__icon {
  font-size: 2rem;
  color: var(--accent);
  opacity: 0.8;
  text-shadow: 0 0 20px var(--accent-glow);
}

/* ============================================
   SYSTEMS SECTION
   ============================================ */
.systems {
  background: linear-gradient(180deg, var(--bg-deep) 0%, rgba(11, 29, 46, 0.5) 50%, var(--bg-deep) 100%);
}

.systems__visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 3rem;
}

.hologram {
  position: relative;
  width: 220px;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hologram__ring {
  position: absolute;
  inset: 0;
  border: 1px solid var(--accent-dim);
  border-radius: 50%;
  animation: hologramPulse 4s ease-out infinite;
}

.hologram__ring:nth-child(2) {
  inset: 25px;
  animation-delay: 1.3s;
  border-color: rgba(0, 240, 255, 0.15);
}

.hologram__core {
  font-size: 2.5rem;
  color: var(--accent);
  text-shadow: 0 0 30px var(--accent-glow);
  animation: coreFloat 6s ease-in-out infinite;
}

.systems__description {
  max-width: 720px;
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ============================================
   PROGRAMS SECTION
   ============================================ */
.programs__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.program-card {
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
}

.program-card__number {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: var(--accent);
  opacity: 0.5;
}

.program-card__title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.program-card__text {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.program-card__link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.05em;
  position: relative;
}

.program-card__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: var(--transition);
}

.program-card__link:hover::after {
  width: 100%;
}

/* ============================================
   LAB / GALLERY SECTION
   ============================================ */
.lab__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.lab-item {
  position: relative;
  border-radius: 1rem;
  overflow: hidden;
}

.lab-item__image {
  height: 280px;
  background: var(--bg-dark);
  position: relative;
}

.lab-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--accent);
  background: radial-gradient(circle at center, var(--bg) 0%, var(--bg-dark) 100%);
  opacity: 0.8;
}

.lab-item__content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.5rem;
  border-radius: 1rem 1rem 0 0;
  border-bottom: none;
  border-left: none;
  border-right: none;
  transform: translateY(8px);
  transition: var(--transition);
}

.lab-item:hover .lab-item__content {
  transform: translateY(0);
}

.lab-item__content h4 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.lab-item__content p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2.5rem;
  align-items: start;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-card {
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.contact-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.75rem;
  background: rgba(0, 240, 255, 0.08);
  color: var(--accent);
  font-size: 1.25rem;
  flex-shrink: 0;
  transition: var(--transition);
}

.contact-card:hover .contact-card__icon {
  background: rgba(0, 240, 255, 0.15);
  box-shadow: 0 0 20px var(--accent-dim);
}

.contact-card__label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.contact-card__value {
  font-size: 1rem;
  color: var(--text);
  font-style: normal;
  transition: color 0.3s ease;
}

.contact-card:hover .contact-card__value {
  color: var(--accent);
}

.contact__form-wrapper {
  padding: 2.5rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form__group {
  position: relative;
}

.form__input {
  width: 100%;
  padding: 1rem 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(0, 240, 255, 0.15);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
}

.form__input:focus {
  border-color: var(--accent);
}

.form__label {
  position: absolute;
  left: 0;
  top: 1rem;
  color: var(--text-muted);
  pointer-events: none;
  transition: var(--transition);
}

.form__input:focus + .form__label,
.form__input:not(:placeholder-shown) + .form__label {
  top: -0.5rem;
  font-size: 0.75rem;
  color: var(--accent);
}

.form__textarea {
  resize: vertical;
  min-height: 100px;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 2.5rem 0;
  border-top: 1px solid rgba(0, 240, 255, 0.06);
  text-align: center;
}

.footer__container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.footer__brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer__copy {
  font-size: 0.8125rem;
  color: var(--text-muted);
  opacity: 0.6;
}

/* ============================================
   ANIMATIONS & KEYFRAMES
   ============================================ */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}

@keyframes scrollPulse {
  0% {
    transform: scaleY(0);
    transform-origin: top;
    opacity: 0;
  }
  50% {
    transform: scaleY(1);
    transform-origin: top;
    opacity: 1;
  }
  51% {
    transform-origin: bottom;
  }
  100% {
    transform: scaleY(0);
    transform-origin: bottom;
    opacity: 0;
  }
}

@keyframes hologramPulse {
  0% {
    transform: scale(0.7);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: scale(1.3);
    opacity: 0;
  }
}

@keyframes coreFloat {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .about__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .lab__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__list {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background: rgba(2, 6, 23, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    transition: var(--transition);
    border-left: 1px solid rgba(0, 240, 255, 0.1);
  }

  .nav__list.active {
    right: 0;
  }

  .nav__link {
    font-size: 1.125rem;
  }

  .nav__toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav__toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .nav__toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .about__grid {
    grid-template-columns: 1fr;
  }
  .programs__grid {
    grid-template-columns: 1fr;
  }
  .lab__grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 4rem 0;
  }

  .hero__content {
    padding-top: 5rem;
  }
}

@media (max-width: 480px) {
  .hero__title {
    font-size: 2rem;
  }
  .btn {
    width: 100%;
  }
  .footer__container {
    text-align: center;
  }
  .contact__form-wrapper {
    padding: 1.5rem;
  }
}