/* ============================================================
   S V COACHING CLASSES – style.css
   Premium, Modern, Glassmorphism-accented Coaching Website
   ============================================================ */

/* ── CSS VARIABLES ──────────────────────────────────────────── */
:root {
  --primary:       #2563EB;   /* Rich Blue */
  --primary-dark:  #1D4ED8;
  --primary-light: #EFF6FF;
  --accent:        #10B981;   /* Emerald Green */
  --accent-light:  #D1FAE5;
  --text-dark:     #0F172A;
  --text-mid:      #475569;
  --text-light:    #94A3B8;
  --bg:            #F8FAFC;
  --bg-white:      #FFFFFF;
  --border:        #E2E8F0;
  --shadow-sm:     0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:     0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg:     0 20px 48px rgba(37,99,235,0.12), 0 6px 16px rgba(0,0,0,0.06);
  --shadow-xl:     0 32px 64px rgba(37,99,235,0.16);
  --radius-sm:     8px;
  --radius-md:     16px;
  --radius-lg:     24px;
  --radius-xl:     32px;
  --transition:    all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font:          'Poppins', Arial, sans-serif;
}

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

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: var(--font); cursor: pointer; border: none; outline: none; }

/* ── UTILITY ────────────────────────────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

/* ── SECTION HEADER ─────────────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-mid);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

.highlight {
  color: var(--primary);
  position: relative;
}

/* ── BUTTONS ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(37,99,235,0.35);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 24px rgba(37,99,235,0.45);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px) scale(1.03);
}

.btn-nav {
  background: var(--primary);
  color: #fff;
  padding: 10px 22px;
  font-size: 0.875rem;
  box-shadow: 0 2px 10px rgba(37,99,235,0.3);
}
.btn-nav:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(37,99,235,0.4);
}

.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #25D366;
  color: #fff;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  margin-top: 24px;
  box-shadow: 0 4px 16px rgba(37,211,102,0.35);
  transition: var(--transition);
}
.btn-whatsapp:hover {
  background: #1ebe57;
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 24px rgba(37,211,102,0.45);
}

.btn-sm {
  background: var(--primary-light);
  color: var(--primary);
  padding: 10px 20px;
  font-size: 0.875rem;
  border-radius: 999px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-sm:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

.btn-primary-sm {
  background: var(--primary);
  color: #fff;
  padding: 10px 20px;
  font-size: 0.875rem;
  border-radius: 999px;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(37,99,235,0.35);
  transition: var(--transition);
}
.btn-primary-sm:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(37,99,235,0.45);
}

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

/* ── GLASSMORPHISM CARD ─────────────────────────────────────── */
.glass-card {
  background: rgba(255,255,255,0.70);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.8);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0;
  transition: var(--transition);
}

/* Transparent on top; scrolled state added via JS */
.navbar.transparent {
  background: transparent;
  box-shadow: none;
}
.navbar.scrolled {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-dark);
  flex-shrink: 0;
}
.nav-logo strong { color: var(--primary); }
.logo-icon { font-size: 1.4rem; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-mid);
  transition: var(--transition);
}
.nav-link:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  padding: 6px;
  margin-left: auto;
  cursor: pointer;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 24px 80px;
  overflow: hidden;
  background: linear-gradient(135deg, #EFF6FF 0%, #F0FDF4 40%, #FAFAFA 100%);
}

/* Decorative blobs */
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  pointer-events: none;
}
.blob-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #93C5FD, #3B82F6);
  top: -150px; right: -100px;
  animation: floatBlob 8s ease-in-out infinite;
}
.blob-2 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, #6EE7B7, #10B981);
  bottom: -80px; left: -80px;
  animation: floatBlob 10s ease-in-out infinite reverse;
}
.blob-3 {
  width: 200px; height: 200px;
  background: radial-gradient(circle, #FDE68A, #F59E0B);
  top: 40%; left: 30%;
  animation: floatBlob 12s ease-in-out infinite 2s;
}

@keyframes floatBlob {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(20px, -30px) scale(1.05); }
  66%       { transform: translate(-15px, 20px) scale(0.95); }
}

/* Hero layout */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 48px;
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 120px;
}

/* Override for full-width background */
.hero {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 48px;
  min-height: 100vh;
  padding: 120px 24px 80px;
  background: linear-gradient(135deg, #EFF6FF 0%, #F0FDF4 60%, #F8FAFC 100%);
}

.hero-content {
  flex: 1 1 480px;
  max-width: 620px;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(37,99,235,0.15);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 999px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--text-dark);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-title .highlight { color: var(--primary); }
.hero-title .subtitle-line { color: var(--text-mid); font-weight: 700; }

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-mid);
  margin-bottom: 32px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* Stat pills row */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}

.stat-pill {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(37,99,235,0.12);
  color: var(--text-dark);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.stat-pill:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(37,99,235,0.3);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

/* Hero Visual card */
.hero-visual {
  flex: 1 1 300px;
  max-width: 360px;
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
}

.hero-card {
  padding: 36px 32px;
  text-align: center;
  width: 100%;
}
.hero-card-icon { font-size: 3rem; margin-bottom: 16px; }
.hero-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-dark);
}
.hero-logo {
  width: 300px;
  height: 300px;
  border-radius: 50%;        /* makes it circle */
  object-fit: cover;         /* keeps image proper */
  border: 3px solid #2563EB; /* optional border */
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
}
.hero-logo {
  transition: transform 0.3s ease;
}

.hero-logo:hover {
  transform: scale(1.1);
}
.hero-card p {
  font-size: 0.9rem;
  color: var(--text-mid);
  margin-bottom: 24px;
}
.hero-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}
.hero-card-tags span {
  background: var(--primary-light);
  color: var(--primary);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* ── ANIMATIONS ─────────────────────────────────────────────── */
.animate-fade-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.7s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* Scroll reveal (added via JS) */
.scroll-reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.65s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.65s cubic-bezier(0.4, 0, 0.2, 1);
}
.scroll-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */
.about { background: #fff; }

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.about-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.about-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary-light) 0%, transparent 60%);
  opacity: 0;
  transition: var(--transition);
}
.about-card:hover {
  border-color: rgba(37,99,235,0.2);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.about-card:hover::before { opacity: 1; }

.card-icon-wrap {
  width: 56px; height: 56px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}
.card-icon-wrap.green  { background: #D1FAE5; }
.card-icon-wrap.blue   { background: #DBEAFE; }
.card-icon-wrap.orange { background: #FEF3C7; }
.card-icon-wrap.purple { background: #EDE9FE; }
.card-icon-wrap.teal   { background: #CCFBF1; }
.card-icon-wrap.red    { background: #FEE2E2; }

.about-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-dark);
  position: relative; z-index: 1;
}
.about-card p {
  font-size: 0.9rem;
  color: var(--text-mid);
  line-height: 1.65;
  position: relative; z-index: 1;
}

/* ============================================================
   COURSES SECTION
   ============================================================ */
.courses { background: var(--bg); }

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.course-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 0;
  transition: var(--transition);
  position: relative;
}
.course-card:hover {
  border-color: rgba(37,99,235,0.25);
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
}

.course-card.featured {
  background: linear-gradient(160deg, #EFF6FF, #F0FDF4);
  border-color: rgba(37,99,235,0.25);
  box-shadow: var(--shadow-md);
}

.course-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-light);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 20px;
  width: fit-content;
}
.course-badge.popular {
  background: linear-gradient(90deg, #FEF3C7, #FDE68A);
  color: #92400E;
}

.course-icon { font-size: 2.5rem; margin-bottom: 16px; }

.course-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-dark);
}
.course-card p {
  font-size: 0.875rem;
  color: var(--text-mid);
  line-height: 1.65;
  margin-bottom: 20px;
}

.course-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
  flex: 1;
}
.course-features li {
  font-size: 0.875rem;
  color: var(--text-mid);
  font-weight: 500;
}

/* ============================================================
   RESULTS / TESTIMONIALS SECTION
   ============================================================ */
.results { background: #fff; }

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.result-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.result-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transition: var(--transition);
  transform-origin: left;
}
.result-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
  border-color: rgba(37,99,235,0.15);
}
.result-card:hover::after { transform: scaleX(1); }

.result-avatar {
  width: 72px; height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #60A5FA);
  color: #fff;
  font-size: 1.6rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  box-shadow: 0 4px 16px rgba(37,99,235,0.3);
}

.result-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.result-avatar img {
  border: 3px solid white;
  transition: transform 0.3s ease;
}

.result-avatar:hover img {
  transform: scale(1.1);
}

.result-avatar.pink   { background: linear-gradient(135deg, #EC4899, #F472B6); box-shadow: 0 4px 16px rgba(236,72,153,0.3); }
.result-avatar.orange { background: linear-gradient(135deg, #F59E0B, #FCD34D); box-shadow: 0 4px 16px rgba(245,158,11,0.3); }
.result-avatar.teal   { background: linear-gradient(135deg, #14B8A6, #5EEAD4); box-shadow: 0 4px 16px rgba(20,184,166,0.3); }

.result-score {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
  letter-spacing: -0.02em;
}
.result-score.blue-score   { color: #7C3AED; }
.result-score.green-score  { color: var(--accent); }
.result-score.purple-score { color: #DB2777; }

.result-name {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text-dark);
}
.result-exam {
  font-size: 0.8rem;
  color: var(--text-light);
  font-weight: 500;
  margin-bottom: 16px;
}
.result-quote {
  font-size: 0.85rem;
  color: var(--text-mid);
  line-height: 1.6;
  font-style: italic;
  margin-bottom: 16px;
}
.result-stars { font-size: 0.9rem; }

/* ============================================================
   CONTACT SECTION
   ============================================================ */
.contact { background: var(--bg); }

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
  align-items: start;
}

/* Contact Info */
.contact-info {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 40px 36px;
  box-shadow: var(--shadow-md);
}
.contact-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 32px;
  color: var(--text-dark);
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 28px;
}
.info-icon {
  width: 48px; height: 48px;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.info-item strong {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-light);
  display: block;
  margin-bottom: 4px;
}
.info-item p {
  font-size: 0.95rem;
  color: var(--text-dark);
  font-weight: 500;
}

/* Contact Form */
.contact-form-wrap {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 40px 36px;
  box-shadow: var(--shadow-md);
}
.contact-form h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 32px;
  color: var(--text-dark);
}

.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-mid);
  margin-bottom: 8px;
  letter-spacing: 0.03em;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.9rem;
  color: var(--text-dark);
  background: var(--bg);
  transition: var(--transition);
  outline: none;
  appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(37,99,235,0.08);
}
.form-group textarea { resize: vertical; min-height: 80px; }
.form-group select { cursor: pointer; }

.form-note {
  font-size: 0.85rem;
  text-align: center;
  margin-top: 12px;
  font-weight: 600;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--text-dark);
  color: rgba(255,255,255,0.7);
  padding-top: 64px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand .nav-logo {
  color: #fff;
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.55);
}

.footer-links h4 {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #fff;
  margin-bottom: 20px;
}
.footer-links ul { display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.55);
  transition: var(--transition);
}
.footer-links a:hover { color: #fff; }

.footer-bottom {
  padding: 20px 24px;
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}

/* ============================================================
   FLOATING WHATSAPP BUTTON
   ============================================================ */
.float-whatsapp {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 999;
  width: 60px; height: 60px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37,211,102,0.5);
  transition: var(--transition);
  animation: pulse 2.5s infinite;
}
.float-whatsapp:hover {
  background: #1ebe57;
  transform: scale(1.12);
  box-shadow: 0 8px 28px rgba(37,211,102,0.6);
  animation: none;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 4px 20px rgba(37,211,102,0.5); }
  50%       { box-shadow: 0 4px 32px rgba(37,211,102,0.8), 0 0 0 12px rgba(37,211,102,0.1); }
}

/* ============================================================
   BACK TO TOP BUTTON
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 28px;
  left: 28px;
  z-index: 999;
  width: 48px; height: 48px;
  background: #fff;
  color: var(--primary);
  border: 1.5px solid var(--border);
  border-radius: 50%;
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
  cursor: pointer;
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* ============================================================
   RESPONSIVE – TABLET & MOBILE
   ============================================================ */
@media (max-width: 1024px) {
  .hero { gap: 32px; }
  .contact-wrapper { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  /* Nav */
  .nav-links {
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    gap: 4px;
    padding: 20px 24px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    transform: translateY(-20px);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  .nav-link { width: 100%; padding: 12px 16px; }
  .btn-nav { display: none; }
  .hamburger { display: flex; }

  /* Hero */
  .hero {
    flex-direction: column;
    text-align: center;
    min-height: auto;
    padding: 100px 20px 60px;
  }
  .hero-stats { justify-content: center; }
  .hero-cta { justify-content: center; }
  .hero-visual { max-width: 100%; }

  /* About */
  .about-grid { grid-template-columns: 1fr; }

  /* Courses */
  .courses-grid { grid-template-columns: 1fr; }

  /* Results */
  .results-grid { grid-template-columns: 1fr; }

  /* Section */
  .section { padding: 64px 0; }
  .section-header { margin-bottom: 40px; }

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

@media (max-width: 480px) {
  .btn { padding: 12px 22px; font-size: 0.875rem; }
  .hero-title { font-size: 2rem; }
  .contact-info, .contact-form-wrap { padding: 28px 20px; }
}