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

:root {
  --primary: #6c63ff;
  --primary-d: #5348d4;
  --accent: #ff6584;
  --dark: #0f0e17;
  --dark2: #1a1a2e;
  --dark3: #16213e;
  --card-bg: #1e1e3a;
  --text: #e0e0f0;
  --muted: #9e9eb8;
  --border: rgba(108, 99, 255, 0.25);
  --radius: 14px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--dark);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}
ul {
  list-style: none;
}
img {
  max-width: 100%;
  display: block;
}

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

/* =============================================
   SCROLLBAR
   ============================================= */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--dark2);
}
::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 3px;
}

/* =============================================
   BUTTONS
   ============================================= */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--primary), #a78bfa);
  color: #fff;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: 0 4px 20px rgba(108, 99, 255, 0.4);
  transition: var(--transition);
  border: none;
  cursor: pointer;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(108, 99, 255, 0.6);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 2px solid var(--primary);
  color: var(--primary);
  padding: 11px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
}

.btn-enroll {
  background: var(--primary);
  color: #fff;
  padding: 9px 22px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-enroll:hover {
  background: var(--primary-d);
  transform: translateY(-1px);
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* =============================================
   SECTION COMMONS
   ============================================= */
section {
  padding: 90px 5%;
}

.section-header {
  text-align: center;
  margin-bottom: 55px;
}
.section-tag {
  display: inline-block;
  background: rgba(108, 99, 255, 0.15);
  color: var(--primary);
  border: 1px solid var(--border);
  padding: 5px 18px;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-header h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 12px;
}
.section-desc {
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto;
  font-size: 0.97rem;
}

/* =============================================
   NAVBAR
   ============================================= */
#navbar {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  padding: 0 5%;
  background: rgba(15, 14, 23, 0.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
#navbar.scrolled {
  padding: 0 5%;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: 1280px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 800;
}
.logo i {
  color: var(--primary);
  font-size: 1.5rem;
}

nav ul {
  display: flex;
  gap: 6px;
}
.nav-link {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--muted);
  transition: var(--transition);
}
.nav-link:hover,
.nav-link.active {
  color: #fff;
  background: rgba(108, 99, 255, 0.15);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* =============================================
   HERO
   ============================================= */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding-top: 110px;
  background:
    radial-gradient(
      ellipse at 70% 50%,
      rgba(108, 99, 255, 0.12) 0%,
      transparent 70%
    ),
    radial-gradient(
      ellipse at 20% 80%,
      rgba(255, 101, 132, 0.08) 0%,
      transparent 60%
    ),
    var(--dark);
  max-width: 1280px;
  margin: 0 auto;
}

.hero-content {
  max-width: 600px;
}
.hero-sub {
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 14px;
}
.hero-content h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.18;
  margin-bottom: 20px;
}
.hero-desc {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 520px;
  margin-bottom: 32px;
}

.hero-btns {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 36px;
  flex-wrap: wrap;
}
.stat span {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  display: block;
}
.stat p {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 2px;
}

/* Code card */
.hero-visual {
  flex-shrink: 0;
}
.code-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  width: 380px;
  box-shadow: var(--shadow);
  animation: float 4s ease-in-out infinite;
}
@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
}
.code-header {
  display: flex;
  align-items: center;
  gap: 7px;
  background: rgba(255, 255, 255, 0.04);
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
}
.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot.red {
  background: #ff5f57;
}
.dot.yellow {
  background: #febc2e;
}
.dot.green {
  background: #28c840;
}
.file-name {
  margin-left: auto;
  font-size: 0.78rem;
  color: var(--muted);
}

.code-card pre {
  padding: 20px;
  font-family: "Courier New", monospace;
  font-size: 0.82rem;
  line-height: 1.75;
  color: #c9d1d9;
  overflow-x: auto;
}
.kw {
  color: #ff79c6;
}
.fn {
  color: #50fa7b;
}
.str {
  color: #f1fa8c;
}
.num {
  color: #bd93f9;
}

/* =============================================
   COURSES
   ============================================= */
.courses-section {
  background: linear-gradient(180deg, var(--dark) 0%, var(--dark2) 100%);
  max-width: 100%;
  padding: 90px 5%;
}

.stack-path {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 42px;
}
.stack-label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 22px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 700;
  border: 1.5px solid;
}
.stack-label.frontend {
  border-color: #00d8ff;
  color: #00d8ff;
  background: rgba(0, 216, 255, 0.08);
}
.stack-label.backend {
  border-color: #44883e;
  color: #6cdb66;
  background: rgba(68, 136, 62, 0.1);
}
.stack-label.database {
  border-color: #336791;
  color: #63b3e8;
  background: rgba(51, 103, 145, 0.1);
}
.stack-label.ai {
  border-color: #a855f7;
  color: #c084fc;
  background: rgba(168, 85, 247, 0.1);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 24px;
  max-width: 1280px;
  margin: 0 auto 48px;
}

.course-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  cursor: default;
}
.course-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(108, 99, 255, 0.25);
  border-color: var(--primary);
}

.course-icon {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.4rem;
  color: #fff;
}

.course-body {
  padding: 20px 22px 24px;
}

.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 50px;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.frontend-badge {
  background: rgba(0, 216, 255, 0.12);
  color: #00d8ff;
  border: 1px solid rgba(0, 216, 255, 0.3);
}
.backend-badge {
  background: rgba(68, 136, 62, 0.15);
  color: #6cdb66;
  border: 1px solid rgba(68, 136, 62, 0.3);
}
.db-badge {
  background: rgba(51, 103, 145, 0.15);
  color: #63b3e8;
  border: 1px solid rgba(51, 103, 145, 0.3);
}
.ai-badge {
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.3);
}

.course-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.course-body > p {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 14px;
}

.topics {
  margin-bottom: 16px;
}
.topics li {
  font-size: 0.83rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 3px 0;
}
.topics li i {
  color: var(--primary);
  font-size: 0.7rem;
}

.course-meta {
  display: flex;
  gap: 18px;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}
.course-meta span {
  font-size: 0.8rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 5px;
}
.course-meta span i {
  color: var(--primary);
}

/* Course banner */
.course-banner {
  max-width: 1280px;
  margin: 0 auto;
  background: linear-gradient(135deg, var(--primary) 0%, #a78bfa 100%);
  border-radius: var(--radius);
  padding: 34px 40px;
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}
.banner-info {
  flex: 1;
}
.banner-info h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.banner-info p {
  font-size: 0.9rem;
  opacity: 0.88;
}
.banner-details {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}
.banner-details div {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.9rem;
  opacity: 0.9;
}
.banner-details i {
  font-size: 1rem;
}
.course-banner .btn-primary {
  background: #fff;
  color: var(--primary);
  box-shadow: none;
  white-space: nowrap;
}
.course-banner .btn-primary:hover {
  background: var(--dark);
  color: #fff;
}

/* =============================================
   CERTIFICATION SLOGAN
   ============================================= */
.cert-slogan-section {
  background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
  padding: 90px 5%;
  position: relative;
  overflow: hidden;
}
.cert-slogan-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(
      ellipse at 30% 50%,
      rgba(108, 99, 255, 0.18) 0%,
      transparent 65%
    ),
    radial-gradient(
      ellipse at 80% 20%,
      rgba(255, 101, 132, 0.12) 0%,
      transparent 55%
    );
  pointer-events: none;
}

.cert-slogan-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  gap: 48px;
  align-items: flex-start;
  position: relative;
}

.cert-slogan-icon {
  flex-shrink: 0;
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, var(--primary), #ff6584);
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: #fff;
  box-shadow: 0 8px 32px rgba(108, 99, 255, 0.5);
  animation: pulse-glow 2.5s ease-in-out infinite;
}
@keyframes pulse-glow {
  0%,
  100% {
    box-shadow: 0 8px 32px rgba(108, 99, 255, 0.5);
  }
  50% {
    box-shadow: 0 8px 50px rgba(255, 101, 132, 0.7);
  }
}

.cert-slogan-text h2 {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  font-weight: 800;
  margin-bottom: 14px;
  line-height: 1.25;
}
.cert-highlight {
  background: linear-gradient(90deg, #f7c948, #ff9f43);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cert-tagline {
  color: var(--muted);
  font-size: 0.97rem;
  max-width: 720px;
  margin-bottom: 32px;
  line-height: 1.75;
}
.cert-tagline strong {
  color: var(--text);
}

/* Comparison columns */
.cert-compare {
  display: flex;
  gap: 0;
  align-items: stretch;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 32px;
}
.cert-col {
  flex: 1;
  padding: 24px 26px;
}
.cert-yes {
  background: rgba(40, 200, 100, 0.07);
  border-right: none;
}
.cert-no {
  background: rgba(255, 80, 80, 0.06);
}

.cert-col-head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.cert-yes .cert-col-head i {
  color: #28c864;
  font-size: 1.2rem;
}
.cert-no .cert-col-head i {
  color: #ff5050;
  font-size: 1.2rem;
}

.cert-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.cert-col li {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.87rem;
  color: var(--muted);
}
.cert-yes li i {
  color: #28c864;
  font-size: 0.75rem;
}
.cert-no li i {
  color: #ff5050;
  font-size: 0.75rem;
}

.cert-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.03);
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--muted);
  writing-mode: vertical-rl;
  letter-spacing: 0.15em;
}

.cert-cta {
  margin-top: 4px;
}

/* =============================================
   ABOUT
   ============================================= */
.about-section {
  background: var(--dark);
  max-width: 100%;
  padding: 90px 5%;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
}

.about-img-wrap {
  position: relative;
  display: inline-block;
}
.about-img-placeholder {
  width: 100%;
  aspect-ratio: 1;
  max-width: 380px;
  background: linear-gradient(135deg, var(--dark2), var(--dark3));
  border: 2px solid var(--border);
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 7rem;
  color: var(--primary);
}
.about-badge-float {
  position: absolute;
  bottom: -16px;
  right: -16px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 10px 20px;
  border-radius: 50px;
  box-shadow: 0 4px 20px rgba(108, 99, 255, 0.5);
}

.about-text p {
  color: var(--muted);
  margin-bottom: 18px;
  font-size: 0.97rem;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 28px;
}
.af-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 0.88rem;
  font-weight: 500;
}
.af-item i {
  color: var(--primary);
  font-size: 1.1rem;
}

/* =============================================
   SERVICES
   ============================================= */
.services-section {
  background: linear-gradient(180deg, var(--dark2) 0%, var(--dark) 100%);
  max-width: 100%;
  padding: 90px 5%;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  max-width: 1280px;
  margin: 0 auto;
}

.service-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: var(--transition);
  text-align: center;
}
.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary);
  box-shadow: 0 16px 40px rgba(108, 99, 255, 0.2);
}
.service-icon {
  width: 64px;
  height: 64px;
  background: rgba(108, 99, 255, 0.15);
  border: 1px solid var(--border);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--primary);
  margin: 0 auto 18px;
  transition: var(--transition);
}
.service-card:hover .service-icon {
  background: var(--primary);
  color: #fff;
}
.service-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.service-card p {
  font-size: 0.87rem;
  color: var(--muted);
}

/* =============================================
   CONTACT
   ============================================= */
.contact-section {
  background: var(--dark2);
  max-width: 100%;
  padding: 90px 5%;
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 50px;
  max-width: 1100px;
  margin: 0 auto;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.ci-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.ci-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: rgba(108, 99, 255, 0.15);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}
.ci-item strong {
  font-size: 0.88rem;
  display: block;
  margin-bottom: 3px;
}
.ci-item p {
  font-size: 0.87rem;
  color: var(--muted);
}

.social-links {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}
.social-links a {
  width: 42px;
  height: 42px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  color: var(--muted);
  transition: var(--transition);
}
.social-links a:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* Form */
.contact-form {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 11px 15px;
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
  font-family: inherit;
  resize: vertical;
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--muted);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.18);
}
.form-group select option {
  background: var(--dark2);
  color: var(--text);
}

.form-success {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(40, 200, 100, 0.12);
  border: 1px solid rgba(40, 200, 100, 0.3);
  border-radius: 10px;
  padding: 12px 16px;
  color: #28c864;
  font-size: 0.9rem;
  font-weight: 500;
}
.hidden {
  display: none !important;
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
  background: var(--dark);
  border-top: 1px solid var(--border);
  padding: 60px 5% 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto;
  padding-bottom: 48px;
}
.footer-brand .logo {
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 0.87rem;
  color: var(--muted);
  max-width: 280px;
}
.footer-links h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links li,
.footer-links a {
  font-size: 0.87rem;
  color: var(--muted);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-links a:hover {
  color: var(--primary);
}
.footer-links i {
  font-size: 0.8rem;
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 18px 0;
  text-align: center;
  font-size: 0.82rem;
  color: var(--muted);
}

/* =============================================
   RESPONSIVE
   ============================================= */

/* ── 1024px: Tablet landscape ── */
@media (max-width: 1024px) {
  /* Hero */
  .hero {
    flex-direction: column;
    text-align: center;
    padding-top: 120px;
    gap: 32px;
  }
  .hero-content {
    max-width: 100%;
  }
  .hero-btns {
    justify-content: center;
  }
  .hero-stats {
    justify-content: center;
  }
  .hero-visual {
    width: 100%;
    display: flex;
    justify-content: center;
  }
  .code-card {
    width: 100%;
    max-width: 460px;
  }

  /* About */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .about-img-placeholder {
    margin: 0 auto;
    max-width: 320px;
  }

  /* Contact */
  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  /* Courses banner */
  .course-banner {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    padding: 28px 28px;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

/* ── 768px: Tablet portrait / large mobile ── */
@media (max-width: 768px) {
  /* Navbar */
  nav,
  .btn-enroll {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  nav.open {
    display: flex;
  }
  nav.open ul {
    flex-direction: column;
    gap: 4px;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(15, 14, 23, 0.97);
    backdrop-filter: blur(14px);
    padding: 16px 5%;
    border-bottom: 1px solid var(--border);
    z-index: 999;
  }
  .nav-link {
    display: block;
    padding: 12px 16px;
    font-size: 1rem;
  }

  /* Global section padding */
  section {
    padding: 60px 4%;
  }

  /* Hero */
  .hero {
    padding-top: 110px;
  }
  .hero-content h1 {
    font-size: clamp(1.7rem, 7vw, 2.4rem);
  }
  .hero-desc {
    font-size: 0.95rem;
  }
  .hero-stats {
    gap: 20px;
  }
  .stat span {
    font-size: 1.6rem;
  }
  .stat p {
    font-size: 0.78rem;
  }

  /* Code card */
  .code-card {
    max-width: 100%;
  }
  .code-card pre {
    font-size: 0.78rem;
    padding: 14px;
  }

  /* Section headers */
  .section-header {
    margin-bottom: 36px;
  }
  .section-header h2 {
    font-size: clamp(1.4rem, 5vw, 2rem);
  }

  /* Stack path labels */
  .stack-path {
    gap: 10px;
  }
  .stack-label {
    padding: 6px 14px;
    font-size: 0.78rem;
  }

  /* Courses grid → 2 columns then 1 */
  .courses-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
  }

  /* Course banners */
  .course-banner {
    padding: 22px 20px;
    gap: 16px;
  }
  .banner-info h3 {
    font-size: 1.05rem;
  }
  .banner-info p {
    font-size: 0.85rem;
  }
  .banner-details {
    gap: 12px;
    flex-wrap: wrap;
  }
  .banner-details div {
    font-size: 0.82rem;
  }

  /* Cert slogan */
  .cert-slogan-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 28px;
  }
  .cert-tagline {
    margin: 0 auto 24px;
  }
  .cert-cta {
    display: block;
    text-align: center;
  }

  /* Cert compare */
  .cert-compare {
    flex-direction: column;
  }
  .cert-divider {
    width: 100%;
    height: 40px;
    writing-mode: horizontal-tb;
    border: none;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }
  .cert-col-head {
    justify-content: center;
  }
  .cert-col li {
    justify-content: center;
  }

  /* About */
  .about-features {
    grid-template-columns: 1fr;
  }
  .about-img-placeholder {
    max-width: 260px;
    font-size: 4.5rem;
  }
  .about-badge-float {
    bottom: -12px;
    right: -8px;
    font-size: 0.8rem;
    padding: 8px 14px;
  }

  /* Services grid */
  .services-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
  }
  .service-card {
    padding: 24px 20px;
  }

  /* Contact */
  .form-row {
    grid-template-columns: 1fr;
  }
  .contact-form {
    padding: 24px 18px;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer {
    padding: 48px 5% 0;
  }
  .footer-brand p {
    max-width: 100%;
  }
}

/* ── 480px: Small mobile ── */
@media (max-width: 480px) {
  /* Global */
  section {
    padding: 50px 4%;
  }

  /* Navbar logo */
  .logo {
    font-size: 1.1rem;
  }
  .logo i {
    font-size: 1.2rem;
  }

  /* Hero */
  .hero {
    padding-top: 100px;
    gap: 24px;
  }
  .hero-content h1 {
    font-size: clamp(1.5rem, 8vw, 2rem);
  }
  .hero-btns {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }
  .btn-primary,
  .btn-outline {
    width: 100%;
    justify-content: center;
  }
  .hero-stats {
    gap: 14px;
    justify-content: space-between;
  }
  .stat span {
    font-size: 1.4rem;
  }

  /* Code card */
  .code-card pre {
    font-size: 0.73rem;
  }

  /* Courses grid → single column */
  .courses-grid {
    grid-template-columns: 1fr;
  }
  .course-icon {
    height: 68px;
    font-size: 2rem;
  }
  .course-body {
    padding: 16px 16px 20px;
  }

  /* Course banners → stack everything */
  .course-banner {
    padding: 20px 16px;
  }
  .banner-details {
    flex-direction: column;
    gap: 8px;
  }
  .course-banner .btn-primary {
    width: 100%;
    justify-content: center;
  }

  /* Cert slogan icon */
  .cert-slogan-icon {
    width: 76px;
    height: 76px;
    font-size: 2.2rem;
  }
  .cert-slogan-text h2 {
    font-size: 1.3rem;
  }
  .cert-col {
    padding: 18px 14px;
  }

  /* About */
  .about-img-placeholder {
    max-width: 220px;
    font-size: 3.8rem;
  }

  /* Services grid → single column */
  .services-grid {
    grid-template-columns: 1fr;
  }

  /* Contact */
  .ci-item {
    gap: 12px;
  }
  .ci-icon {
    width: 40px;
    height: 40px;
    font-size: 0.9rem;
  }
  .contact-form {
    padding: 20px 14px;
    gap: 12px;
  }
  .form-group input,
  .form-group select,
  .form-group textarea {
    padding: 10px 12px;
    font-size: 0.87rem;
  }
  .social-links a {
    width: 38px;
    height: 38px;
    font-size: 0.95rem;
  }

  /* Footer */
  .footer-bottom {
    font-size: 0.76rem;
  }
  .footer-bottom i {
    font-size: 0.76rem;
  }
}

/* ── 360px: Very small screens ── */
@media (max-width: 360px) {
  section {
    padding: 44px 3.5%;
  }
  .hero-content h1 {
    font-size: 1.4rem;
  }
  .courses-grid {
    gap: 12px;
  }
  .course-banner {
    padding: 16px 12px;
  }
  .contact-form {
    padding: 16px 12px;
  }
}

/* ── 425px: Contact form fix for 375px–425px devices ── */
@media (max-width: 425px) {
  /* Force contact section to not overflow */
  .contact-section {
    padding: 50px 3%;
    overflow-x: hidden;
  }
  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 24px;
    width: 100%;
    max-width: 100%;
  }
  .contact-form {
    padding: 18px 12px;
    gap: 12px;
    width: 100%;
    box-sizing: border-box;
    border-radius: 10px;
  }
  .form-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .form-group {
    width: 100%;
  }
  .form-group input,
  .form-group select,
  .form-group textarea {
    width: 100%;
    padding: 10px 10px;
    font-size: 0.85rem;
    box-sizing: border-box;
    min-width: 0;
  }
  .form-group label {
    font-size: 0.8rem;
  }
  .btn-full {
    width: 100%;
    font-size: 0.9rem;
    padding: 12px 16px;
  }
  /* Contact info side */
  .contact-info {
    gap: 16px;
  }
  .ci-item {
    gap: 10px;
  }
  .ci-icon {
    width: 38px;
    height: 38px;
    font-size: 0.85rem;
    flex-shrink: 0;
  }
  .ci-item strong {
    font-size: 0.82rem;
  }
  .ci-item p {
    font-size: 0.8rem;
    word-break: break-word;
  }
  .social-links {
    gap: 8px;
  }
  .social-links a {
    width: 36px;
    height: 36px;
    font-size: 0.88rem;
  }
}