:root {
      --bg: #030303;
      --surface: rgba(17, 17, 17, 0.7);
      --surface-card: rgba(22, 22, 22, 0.4);
      --surface-glow: rgba(139, 92, 246, 0.08);
      --accent: #8b5cf6;
      --accent-cyan: #06b6d4;
      --accent-lt: #a78bfa;
      --accent-amber: #f59e0b;
      --accent-glow: rgba(139, 92, 246, 0.15);
      --text: #f3f4f6;
      --text-muted: #9ca3af;
      --border: rgba(255, 255, 255, 0.08);
      --border-hover: rgba(139, 92, 246, 0.3);
      --font-primary: 'Outfit', sans-serif;
      --font-display: 'Playfair Display', serif;
    }

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

    html {
      scroll-behavior: smooth;
      overflow-x: hidden;
    }

    body {
      font-family: var(--font-primary);
      font-weight: 300;
      font-size: 1.05rem;
      line-height: 1.6;
      color: var(--text);
      background: var(--bg);
      overflow-x: hidden;
      /* Grid futurístico sutil de fundo */
      background-image:
        linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
      background-size: 50px 50px;
    }

    /* Custom Scrollbar */
    ::-webkit-scrollbar {
      width: 8px;
    }

    ::-webkit-scrollbar-track {
      background: var(--bg);
    }

    ::-webkit-scrollbar-thumb {
      background: #222;
      border-radius: 4px;
    }

    ::-webkit-scrollbar-thumb:hover {
      background: var(--accent);
    }

    /* Custom Cursor Halo */
    #custom-cursor {
      width: 20px;
      height: 20px;
      border: 2px solid var(--accent);
      border-radius: 50%;
      position: fixed;
      pointer-events: none;
      z-index: 9999;
      transform: translate(-50%, -50%);
      transition: width 0.2s, height 0.2s, background-color 0.2s, border-color 0.2s;
      mix-blend-mode: screen;
      display: none;
    }

    @media (pointer: fine) {
      #custom-cursor {
        display: block;
      }
    }

    #custom-cursor-dot {
      width: 6px;
      height: 6px;
      background-color: var(--accent-cyan);
      border-radius: 50%;
      position: fixed;
      pointer-events: none;
      z-index: 9999;
      transform: translate(-50%, -50%);
      display: none;
    }

    @media (pointer: fine) {
      #custom-cursor-dot {
        display: block;
      }
    }

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

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 clamp(1.5rem, 5vw, 3rem);
    }

    section {
      padding: clamp(5rem, 10vw, 8rem) 0;
      position: relative;
    }

    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      font-weight: 700;
      font-size: 0.75rem;
      letter-spacing: 0.15em;
      text-transform: uppercase;
      color: var(--accent-cyan);
      margin-bottom: 1rem;
      background: rgba(6, 182, 212, 0.1);
      padding: 0.4rem 1rem;
      border-radius: 50px;
      border: 1px solid rgba(6, 182, 212, 0.2);
    }

    .section-title {
      font-family: var(--font-display);
      font-weight: 900;
      font-size: clamp(2.2rem, 5vw, 3.8rem);
      line-height: 1.15;
      margin-bottom: 1.5rem;
      letter-spacing: -0.01em;
    }

    .section-title em {
      background: linear-gradient(135deg, var(--accent) 30%, var(--accent-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      font-style: italic;
    }

    /* Scroll progress */
    #scroll-progress {
      position: fixed;
      top: 0;
      left: 0;
      height: 3px;
      width: 0%;
      background: linear-gradient(to right, var(--accent), var(--accent-cyan));
      z-index: 10001;
    }

    /* Nav */
    .nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(3, 3, 3, 0.75);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border);
      transition: padding 0.3s;
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 1.25rem clamp(1.5rem, 5vw, 3rem);
      max-width: 1200px;
      margin: 0 auto;
    }

    .nav-logo {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .nav-logo img {
      height: 42px;
      width: auto;
      border-radius: 50%;
      border: 2px solid var(--border-hover);
    }

    .nav-logo-text {
      font-family: var(--font-display);
      font-weight: 700;
      font-size: 1.25rem;
      letter-spacing: -0.02em;
    }

    .nav-logo-text .accent-g {
      /* background: linear-gradient(135deg, var(--accent), var(--accent-cyan)); */
      background-color: var(--text);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .nav-logo-text .logo-full {
      display: inline;
    }

    .nav-logo-text .logo-short {
      display: none;
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.6rem;
      padding: 0.9rem 2.2rem;
      border-radius: 100px;
      font-family: var(--font-primary);
      font-weight: 600;
      font-size: 0.95rem;
      border: none;
      cursor: pointer;
      position: relative;
      overflow: hidden;
      z-index: 1;
      transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.3s ease;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--accent) 0%, var(--accent-cyan) 100%);
      color: #fff;
    }

    .btn-primary::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent) 100%);
      z-index: -1;
      opacity: 0;
      transition: opacity 0.4s ease;
    }

    .btn-primary:hover::before {
      opacity: 1;
    }

    .btn-primary:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 12px 30px rgba(139, 92, 246, 0.4);
    }

    .btn-ghost {
      background: rgba(255, 255, 255, 0.03);
      color: var(--text-muted);
      border: 1px solid var(--border);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      transition: all 0.3s;
    }

    .btn-ghost:hover {
      color: #fff;
      background: rgba(255, 255, 255, 0.08);
      border-color: var(--border-hover);
      transform: translateY(-2px);
    }

    .btn-lg {
      padding: 1.15rem 3.5rem;
      font-size: 1.1rem;
      font-weight: 700;
    }

    .nav-cta-short {
      display: none;
    }

    /* Hero */
    .hero {
      padding-top: clamp(2rem, 5vw, 4rem);
      padding-bottom: clamp(4rem, 8vw, 6rem);
      overflow: hidden;
    }

    .hero-canvas {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      z-index: 0;
    }

    .hero-glow-1 {
      position: absolute;
      top: -10%;
      right: -10%;
      width: clamp(300px, 50vw, 600px);
      height: clamp(300px, 50vw, 600px);
      background: radial-gradient(circle, rgba(139, 92, 246, 0.2) 0%, transparent 70%);
      pointer-events: none;
      z-index: 0;
      filter: blur(50px);
    }

    .hero-glow-2 {
      position: absolute;
      bottom: -10%;
      left: -10%;
      width: clamp(250px, 40vw, 500px);
      height: clamp(250px, 40vw, 500px);
      background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
      pointer-events: none;
      z-index: 0;
      filter: blur(40px);
    }

    .hero-inner {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: clamp(2rem, 5vw, 4rem);
      align-items: center;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 0.6rem;
      padding: 0.5rem 1.25rem;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border);
      border-radius: 100px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-muted);
      margin-bottom: 1.5rem;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
      backdrop-filter: blur(5px);
      -webkit-backdrop-filter: blur(5px);
    }

    .hero-tag .dot {
      width: 8px;
      height: 8px;
      background: var(--accent-cyan);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--accent-cyan);
      animation: pulse 1.5s infinite alternate;
    }

    @keyframes pulse {
      0% {
        opacity: 0.4;
        transform: scale(0.9);
      }

      100% {
        opacity: 1;
        transform: scale(1.2);
      }
    }

    .hero h1 {
      font-family: var(--font-display);
      font-weight: 900;
      font-size: clamp(2.6rem, 6vw, 4.8rem);
      line-height: 1.1;
      margin-bottom: 1.5rem;
      letter-spacing: -0.02em;
    }

    .hero h1 em {
      background: linear-gradient(135deg, var(--accent) 30%, var(--accent-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      font-style: italic;
    }

    .hero p {
      color: var(--text-muted);
      font-size: 1.15rem;
      max-width: 520px;
      margin-bottom: 2.2rem;
      line-height: 1.6;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 1.25rem;
      margin-bottom: 3.5rem;
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      padding-top: 2.5rem;
      border-top: 1px solid var(--border);
    }

    .hero-stat-value {
      font-family: var(--font-display);
      font-weight: 900;
      font-size: clamp(1.6rem, 3.5vw, 2.3rem);
      background: linear-gradient(135deg, var(--accent), var(--accent-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 1.2;
    }

    .hero-stat-label {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-top: 0.35rem;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      font-weight: 600;
    }

    .hero-photo {
      position: relative;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .hero-photo-wrapper {
      position: relative;
      width: 100%;
      max-width: 440px;
      border-radius: 30px;
      overflow: visible;
    }

    /* Ambient aura behind professor photo */
    .photo-aura {
      position: absolute;
      inset: -15px;
      background: linear-gradient(135deg, rgba(139, 92, 246, 0.35) 0%, rgba(6, 182, 212, 0.35) 100%);
      filter: blur(35px);
      border-radius: 40px;
      z-index: 0;
      opacity: 0.8;
      animation: float-slow 8s ease-in-out infinite;
    }

    .hero-photo-frame {
      position: relative;
      height: 520px;
      display: flex;
      align-items: flex-end;
      justify-content: center;
      border-radius: 24px;
      background: linear-gradient(180deg, rgba(22, 22, 22, 0.4) 0%, rgba(10, 10, 10, 0.9) 100%);
      border: 1px solid var(--border);
      overflow: hidden;
      z-index: 1;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    }

    .hero-photo-frame img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      object-position: top center;
      mask-image: linear-gradient(to bottom, black 80%, transparent 100%);
      -webkit-mask-image: linear-gradient(to bottom, black 80%, transparent 100%);
      transition: transform 0.5s ease;
    }

    .hero-photo-frame:hover img {
      transform: scale(1.03);
    }

    /* Floating badges */
    .floating-badge {
      position: absolute;
      background: rgba(20, 20, 20, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 16px;
      padding: 0.8rem 1.2rem;
      display: flex;
      align-items: center;
      gap: 0.75rem;
      z-index: 2;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    }

    .floating-badge-1 {
      top: 15%;
      left: -20px;
      animation: float-badge-1 6s ease-in-out infinite;
      border-left: 3px solid var(--accent);
    }

    .floating-badge-2 {
      bottom: 25%;
      right: -20px;
      animation: float-badge-2 7s ease-in-out infinite;
      border-left: 3px solid var(--accent-cyan);
    }

    .floating-badge-icon {
      font-size: 1.5rem;
      line-height: 1;
    }

    .floating-badge-title {
      font-size: 0.85rem;
      font-weight: 700;
      color: #fff;
    }

    .floating-badge-desc {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    @keyframes float-badge-1 {

      0%,
      100% {
        transform: translateY(0) rotate(-1deg);
      }

      50% {
        transform: translateY(-12px) rotate(1deg);
      }
    }

    @keyframes float-badge-2 {

      0%,
      100% {
        transform: translateY(0) rotate(1deg);
      }

      50% {
        transform: translateY(-15px) rotate(-1deg);
      }
    }

    @keyframes float-slow {

      0%,
      100% {
        transform: scale(1);
        opacity: 0.8;
      }

      50% {
        transform: scale(1.05);
        opacity: 0.95;
      }
    }

    /* Double Marquee */
    .marquee-container {
      background: #000;
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
      padding: 1.5rem 0;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      gap: 1rem;
      position: relative;
      z-index: 10;
    }

    .marquee-track {
      display: flex;
      width: max-content;
    }

    .marquee-track-l2r {
      animation: marquee-l2r 30s linear infinite;
    }

    .marquee-track-r2l {
      animation: marquee-r2l 30s linear infinite;
    }

    .marquee-content {
      display: flex;
      align-items: center;
      gap: clamp(1.5rem, 4vw, 3rem);
      padding-right: clamp(1.5rem, 4vw, 3rem);
      white-space: nowrap;
      font-family: var(--font-display);
      font-weight: 700;
      font-size: clamp(1.1rem, 2.5vw, 1.6rem);
      color: var(--text);
    }

    .marquee-content span {
      background: linear-gradient(135deg, var(--accent), var(--accent-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      font-size: 1.3rem;
    }

    @keyframes marquee-r2l {
      0% {
        transform: translateX(0);
      }

      100% {
        transform: translateX(-50%);
      }
    }

    @keyframes marquee-l2r {
      0% {
        transform: translateX(-50%);
      }

      100% {
        transform: translateX(0);
      }
    }

    /* Course info */
    .course-info {
      position: relative;
    }

    .course-info-inner {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: clamp(2rem, 5vw, 4rem);
      align-items: center;
    }

    .course-info-text p {
      color: var(--text-muted);
      margin-bottom: 2rem;
      font-size: 1.1rem;
      max-width: 500px;
    }

    .info-cards {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.25rem;
    }

    .info-card {
      background: var(--surface-card);
      border: 1px solid var(--border);
      border-radius: 20px;
      padding: 2rem 1.75rem;
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      position: relative;
      overflow: hidden;
      transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
      transform-style: preserve-3d;
      perspective: 1000px;
    }

    .info-card::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at top left, rgba(139, 92, 246, 0.12), transparent 60%);
      opacity: 0;
      transition: opacity 0.4s;
    }

    .info-card:hover {
      border-color: var(--border-hover);
      box-shadow: 0 10px 30px rgba(139, 92, 246, 0.1);
      transform: translateY(-5px);
    }

    .info-card:hover::before {
      opacity: 1;
    }

    .info-card-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 48px;
      height: 48px;
      background: rgba(139, 92, 246, 0.15);
      border-radius: 12px;
      font-size: 1.4rem;
      margin-bottom: 1.25rem;
      border: 1px solid rgba(139, 92, 246, 0.25);
    }

    .info-card-value {
      font-family: var(--font-display);
      font-weight: 900;
      font-size: 1.4rem;
      background: linear-gradient(135deg, #fff, #ddd);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 0.35rem;
    }

    .info-card-label {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.4;
    }

    /* Contents Section */
    .contents {
      background: linear-gradient(180deg, transparent, rgba(139, 92, 246, 0.02) 50%, transparent 100%);
    }

    .contents-header {
      margin-bottom: 3.5rem;
      text-align: center;
    }

    .contents-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 1.5rem;
    }

    .content-card {
      position: relative;
      background: var(--surface-card);
      border: 1px solid var(--border);
      border-radius: 20px;
      padding: 2.25rem 2rem;
      overflow: hidden;
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
      transform-style: preserve-3d;
      perspective: 1000px;
    }

    .content-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(to right, var(--accent), var(--accent-cyan));
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    }

    .content-card:hover {
      transform: translateY(-8px);
      border-color: var(--border-hover);
      box-shadow: 0 15px 35px rgba(139, 92, 246, 0.15);
      background: rgba(22, 22, 22, 0.7);
    }

    .content-card:hover::before {
      transform: scaleX(1);
    }

    .content-card-num {
      font-size: 0.8rem;
      font-weight: 800;
      letter-spacing: 0.15em;
      color: var(--accent-cyan);
      margin-bottom: 1.25rem;
      opacity: 0.8;
    }

    .content-card-icon {
      font-size: 2rem;
      margin-bottom: 1rem;
      line-height: 1;
      display: inline-block;
      transition: transform 0.3s ease;
    }

    .content-card:hover .content-card-icon {
      transform: scale(1.15) rotate(5deg);
    }

    .content-card-title {
      font-family: var(--font-display);
      font-weight: 700;
      font-size: 1.4rem;
      margin-bottom: 0.75rem;
      color: #fff;
    }

    .content-card-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* Why Section */
    .why-header {
      margin-bottom: 4rem;
    }

    .why-list {
      display: flex;
      flex-direction: column;
    }

    .why-item {
      display: grid;
      grid-template-columns: auto 1fr;
      gap: clamp(1.5rem, 5vw, 4rem);
      padding: clamp(2.2rem, 5vw, 3.5rem) 0;
      border-bottom: 1px solid var(--border);
      position: relative;
      overflow: hidden;
    }

    .why-item:first-child {
      border-top: 1px solid var(--border);
    }

    .why-item::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 1px;
      background: linear-gradient(to right, var(--accent), var(--accent-cyan));
      transition: width 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
    }

    .why-item:hover::after {
      width: 100%;
    }

    .why-num {
      font-family: var(--font-display);
      font-weight: 900;
      font-size: clamp(3.5rem, 7vw, 5.5rem);
      background: linear-gradient(135deg, rgba(139, 92, 246, 0.25), rgba(6, 182, 212, 0.25));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 0.9;
      opacity: 0.8;
      transition: all 0.4s ease;
    }

    .why-item:hover .why-num {
      background: linear-gradient(135deg, var(--accent), var(--accent-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      transform: scale(1.05);
    }

    .why-title {
      font-family: var(--font-display);
      font-weight: 700;
      font-size: clamp(1.5rem, 3vw, 2.1rem);
      margin-bottom: 0.75rem;
      color: #fff;
    }

    .why-desc {
      color: var(--text-muted);
      max-width: 600px;
      font-size: 1.02rem;
    }

    /* Testimonials Section (New) */
    .testimonials {
      background: linear-gradient(180deg, transparent, rgba(6, 182, 212, 0.015) 50%, transparent 100%);
      overflow: hidden;
    }

    .testimonials-header {
      text-align: center;
      margin-bottom: 4rem;
    }

    .testimonials-wrapper {
      position: relative;
      width: 100%;
      margin: 0 auto;
    }

    .testimonials-slider {
      display: flex;
      gap: 1.5rem;
      overflow-x: auto;
      scroll-snap-type: x mandatory;
      scrollbar-width: none;
      -ms-overflow-style: none;
      padding: 1rem 0.25rem 2rem 0.25rem;
    }

    .testimonials-slider::-webkit-scrollbar {
      display: none;
    }

    .testimonial-card {
      flex: 0 0 380px;
      scroll-snap-align: center;
      background: var(--surface-card);
      border: 1px solid var(--border);
      border-radius: 24px;
      padding: 2.5rem;
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    @media (max-width: 480px) {
      .testimonial-card {
        flex: 0 0 290px;
        padding: 1.75rem;
      }
    }

    .testimonial-card:hover {
      border-color: var(--border-hover);
      box-shadow: 0 15px 35px rgba(139, 92, 246, 0.1);
      transform: translateY(-5px);
    }

    .testimonial-rating {
      color: var(--accent-amber);
      margin-bottom: 1.25rem;
      font-size: 1rem;
      letter-spacing: 0.15em;
    }

    .testimonial-quote {
      font-size: 0.98rem;
      color: var(--text);
      line-height: 1.6;
      margin-bottom: 1.75rem;
      font-style: italic;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 1rem;
      margin-top: auto;
    }

    .testimonial-author-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--accent), var(--accent-cyan));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #fff;
      font-size: 1.1rem;
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    .testimonial-author-name {
      font-weight: 700;
      font-size: 0.95rem;
      color: #fff;
    }

    .testimonial-author-desc {
      font-size: 0.8rem;
      color: var(--accent-cyan);
      margin-top: 0.1rem;
      font-weight: 500;
    }

    .testimonials-nav {
      display: flex;
      justify-content: center;
      gap: 1rem;
      margin-top: 2rem;
    }

    .testimonials-nav-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border);
      color: var(--text);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.3s;
    }

    .testimonials-nav-btn:hover {
      background: rgba(255, 255, 255, 0.08);
      border-color: var(--border-hover);
      color: var(--accent-cyan);
      transform: scale(1.05);
    }

    /* Professor Section */
    .professor-inner {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: clamp(2rem, 5vw, 4rem);
      align-items: center;
    }

    .professor-photo {
      position: relative;
      border-radius: 24px;
      overflow: hidden;
      height: 520px;
      border: 1px solid var(--border);
      box-shadow: 0 20px 45px rgba(0, 0, 0, 0.5);
    }

    .professor-photo img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      object-position: top center;
    }

    .professor-content {
      position: relative;
    }

    .professor-name {
      font-family: var(--font-display);
      font-weight: 900;
      font-size: clamp(2.2rem, 4vw, 3.2rem);
      margin-bottom: 0.5rem;
      letter-spacing: -0.015em;
    }

    .professor-role {
      font-size: 1.15rem;
      color: var(--accent-cyan);
      margin-bottom: 1.75rem;
      font-weight: 600;
      letter-spacing: 0.02em;
    }

    .professor-bio {
      color: var(--text-muted);
      margin-bottom: 3rem;
      font-size: 1.08rem;
      line-height: 1.7;
    }

    .professor-metrics {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
    }

    .professor-metric-card {
      background: var(--surface-card);
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 1.5rem;
      text-align: center;
      transition: all 0.3s ease;
    }

    .professor-metric-card:hover {
      border-color: var(--border-hover);
      transform: translateY(-3px);
      box-shadow: 0 8px 20px rgba(139, 92, 246, 0.08);
    }

    .professor-metric-value {
      font-family: var(--font-display);
      font-weight: 900;
      font-size: clamp(1.6rem, 3vw, 2.3rem);
      background: linear-gradient(135deg, var(--accent) 30%, var(--accent-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 1.2;
    }

    .professor-metric-label {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-top: 0.4rem;
      font-weight: 500;
      line-height: 1.3;
    }

    /* Countdown Section (New) */
    .countdown-section {
      background: linear-gradient(180deg, transparent, rgba(139, 92, 246, 0.03) 50%, transparent 100%);
      padding: 6rem 0;
      position: relative;
    }

    .countdown-glow {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(6, 182, 212, 0.12) 0%, transparent 70%);
      filter: blur(50px);
      pointer-events: none;
    }

    .countdown-container {
      text-align: center;
      max-width: 800px;
      margin: 0 auto;
    }

    .countdown-title {
      font-family: var(--font-display);
      font-size: clamp(1.8rem, 4vw, 2.8rem);
      font-weight: 900;
      margin-bottom: 2.5rem;
      color: #fff;
    }

    .countdown-title em {
      background: linear-gradient(135deg, var(--accent), var(--accent-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      font-style: italic;
    }

    .countdown-timer {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      max-width: 600px;
      margin: 0 auto 2.5rem auto;
    }

    .countdown-item {
      background: rgba(22, 22, 22, 0.6);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border);
      border-radius: 20px;
      padding: 1.75rem 1rem;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
      position: relative;
      overflow: hidden;
    }

    .countdown-item::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.02) 0%, transparent 100%);
      pointer-events: none;
    }

    .countdown-number {
      font-family: var(--font-display);
      font-size: clamp(2.2rem, 5vw, 3.5rem);
      font-weight: 900;
      line-height: 1;
      background: linear-gradient(135deg, #fff, #bbb);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 0.5rem;
    }

    .countdown-label {
      font-size: 0.75rem;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.1em;
      font-weight: 700;
    }

    .countdown-text {
      color: var(--text-muted);
      font-size: 1rem;
    }

    /* FAQ Section (New) */
    .faq {
      position: relative;
    }

    .faq-header {
      text-align: center;
      margin-bottom: 4rem;
    }

    .faq-container {
      max-width: 760px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .faq-item {
      background: var(--surface-card);
      border: 1px solid var(--border);
      border-radius: 20px;
      overflow: hidden;
      transition: all 0.3s;
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
    }

    .faq-item:hover {
      border-color: var(--border-hover);
      box-shadow: 0 10px 25px rgba(139, 92, 246, 0.05);
    }

    .faq-question {
      padding: 1.5rem 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
      font-size: 1.05rem;
      color: #fff;
      user-select: none;
    }

    .faq-icon {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.3s;
      font-size: 1rem;
      color: var(--accent-cyan);
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      background: rgba(6, 182, 212, 0.1);
      border-color: rgba(6, 182, 212, 0.3);
      color: var(--accent-cyan);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    }

    .faq-answer-inner {
      padding: 0 2rem 1.75rem 2rem;
      color: var(--text-muted);
      font-size: 0.98rem;
      line-height: 1.6;
    }

    /* CTA Section */
    .cta {
      position: relative;
      background: var(--surface-card);
      overflow: hidden;
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
      padding: 6rem 0;
    }

    .cta-glow {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 600px;
      height: 600px;
      background: radial-gradient(circle, rgba(139, 92, 246, 0.18) 0%, transparent 70%);
      filter: blur(60px);
      pointer-events: none;
      z-index: 0;
    }

    .cta-inner {
      position: relative;
      z-index: 1;
      text-align: center;
      max-width: 680px;
      margin: 0 auto;
    }

    .cta-inner p {
      color: var(--text-muted);
      margin-bottom: 3rem;
      font-size: 1.15rem;
    }

    .cta-price-box {
      background: rgba(17, 17, 17, 0.6);
      border: 1px solid rgba(139, 92, 246, 0.25);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-radius: 24px;
      padding: 3rem 2rem;
      margin-bottom: 2rem;
      box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.05);
      position: relative;
      overflow: hidden;
    }

    .cta-price-box::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: linear-gradient(to right, var(--accent), var(--accent-cyan));
    }

    .cta-price-label {
      font-size: 0.9rem;
      color: var(--accent-cyan);
      margin-bottom: 1rem;
      text-transform: uppercase;
      letter-spacing: 0.15em;
      font-weight: 700;
    }

    .cta-price-value {
      margin-bottom: 2rem;
    }

    .cta-price-old {
      font-size: 1.1rem;
      color: var(--text-muted);
      text-decoration: line-through;
      margin-bottom: 0.25rem;
      opacity: 0.7;
    }

    .cta-price-new {
      font-family: var(--font-display);
      font-weight: 900;
      font-size: clamp(2.8rem, 6vw, 4rem);
      color: #fff;
      line-height: 1.1;
    }

    .cta-price-new span {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--accent-cyan);
      margin-right: 0.25rem;
    }

    .cta-note {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-top: 1.5rem;
    }

    /* Footer */
    footer {
      background: #020202;
      border-top: 1px solid var(--border);
      padding: 3.5rem 0 2.5rem 0;
      position: relative;
      z-index: 10;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 3rem;
      margin-bottom: 3rem;
    }

    .footer-brand p {
      color: var(--text-muted);
      font-size: 0.95rem;
      margin-top: 1rem;
      max-width: 320px;
    }

    .footer-title {
      font-weight: 700;
      font-size: 0.95rem;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: #fff;
      margin-bottom: 1.25rem;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
    }

    .footer-links a {
      color: var(--text-muted);
      font-size: 0.95rem;
      transition: color 0.3s;
    }

    .footer-links a:hover {
      color: var(--accent-cyan);
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 1.5rem;
      padding-top: 2rem;
      border-top: 1px solid var(--border);
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .footer-socials {
      display: flex;
      align-items: center;
      gap: 1.25rem;
    }

    .footer-social-link {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.3s;
      color: var(--text-muted);
    }

    .footer-social-link:hover {
      background: rgba(6, 182, 212, 0.1);
      border-color: var(--border-hover);
      color: var(--accent-cyan);
      transform: translateY(-3px);
    }

    .footer-credit {
      color: var(--accent-cyan);
      font-weight: 600;
    }

    .footer-credit:hover {
      opacity: 0.8;
    }

    /* Responsive adjustments */
    @media (max-width: 1024px) {
      .hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
      }

      .hero-inner .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
      }

      .hero-actions {
        justify-content: center;
      }

      .hero-photo {
        order: -1;
      }

      .hero-photo-frame {
        height: 450px;
      }

      .hero-stats {
        width: 100%;
        max-width: 600px;
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
      }

      .course-info-inner,
      .professor-inner {
        grid-template-columns: 1fr;
      }

      .professor-photo {
        height: 450px;
        max-width: 440px;
        margin: 0 auto;
      }

      .professor-content {
        text-align: center;
      }

      .professor-metrics {
        max-width: 500px;
        margin: 0 auto;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }

      .footer-brand {
        grid-column: span 2;
      }
    }

    @media (max-width: 768px) {
      .contents-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      }

      .nav-cta-text {
        display: none;
      }

      .nav-cta-short {
        display: inline;
      }

      .btn-nav {
        padding: 0.75rem 1.5rem;
        font-size: 0.85rem;
      }
    }

    @media (max-width: 480px) {
      .hero-stats {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 1rem;
      }

      .nav-logo-text .logo-full {
        display: none;
      }

      .nav-logo-text .logo-short {
        display: inline;
      }

      .nav-logo img {
        height: 36px;
      }

      .hero-actions {
        flex-direction: column;
        width: 100%;
      }

      .hero-actions .btn {
        width: 100%;
      }

      .info-cards {
        grid-template-columns: 1fr;
      }

      .why-item {
        grid-template-columns: 1fr;
        gap: 1rem;
        text-align: center;
      }

      .why-desc {
        margin: 0 auto;
      }

      .professor-metrics {
        grid-template-columns: 1fr;
      }

      .countdown-timer {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .footer-brand {
        grid-column: span 1;
      }

      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }

.footer-credits {
  text-align: center;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
}