/* ============================================
   Rajkumar Potula — Digital Marketing Portfolio
   Theme: Bright & Light with Cyan Accents
   ============================================ */

/* ----- ROOT VARIABLES ----- */
:root {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-glass: rgba(255,255,255,0.78);

  --cyan: #0ea5e9;
  --cyan-dim: #0284c7;
  --cyan-glow: rgba(14,165,233,0.08);
  --cyan-glow-strong: rgba(14,165,233,0.18);

  --purple: #7c3aed;
  --purple-glow: rgba(124,58,237,0.1);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --border-glass: rgba(0,0,0,0.06);
  --border-cyan: rgba(14,165,233,0.25);

  --gradient-1: linear-gradient(135deg, #0ea5e9, #7c3aed);
  --gradient-2: linear-gradient(135deg, #0ea5e9, #0284c7);

  --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.04);
  --shadow-cyan: 0 4px 24px rgba(14,165,233,0.12);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.06);

  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;

  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-fast: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--cyan) transparent;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--cyan-dim); border-radius: 3px; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--cyan);
  color: #fff;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
}

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

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

.section {
  padding: 110px 0;
  position: relative;
  z-index: 1;
}

.section-alt {
  background: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header .section-desc {
  margin: 0 auto;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--cyan);
  background: var(--cyan-glow);
  padding: 6px 18px;
  border-radius: 50px;
  border: 1px solid var(--border-cyan);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.section-title span {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  line-height: 1.7;
}

/* ----- PARTICLES CANVAS ----- */
#particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
}

/* ----- NAVBAR ----- */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 18px 0;
  transition: var(--transition);
}

nav.scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: 0 1px 8px rgba(0,0,0,0.03);
  padding: 10px 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

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

.logo-dot {
  display: inline-block;
  width: 8px; height: 8px;
  background: var(--gradient-1);
  border-radius: 50%;
  margin-left: 2px;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--cyan);
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 24px;
  background: var(--gradient-1);
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.85rem;
  color: #fff !important;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(14,165,233,0.25);
}

.nav-cta::after { display: none !important; }

/* ----- HAMBURGER ----- */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
  z-index: 1001;
}

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

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ----- HERO ----- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 140px 0 80px;
  z-index: 1;
  overflow: hidden;
}

.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 80% 20%, rgba(14,165,233,0.07) 0%, transparent 60%),
    radial-gradient(ellipse at 20% 80%, rgba(124,58,237,0.05) 0%, transparent 60%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--cyan);
  background: var(--cyan-glow);
  border: 1px solid var(--border-cyan);
  padding: 8px 20px;
  border-radius: 50px;
  margin-bottom: 28px;
  animation: fadeInUp 0.8s ease both;
}

.hero-badge i { font-size: 0.7rem; }

.hero-badge-dot {
  width: 6px; height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.8rem);
  line-height: 1.08;
  margin-bottom: 24px;
  letter-spacing: -1px;
  animation: fadeInUp 0.8s ease 0.15s both;
  color: var(--text-primary);
}

.hero h1 .gradient-text {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 540px;
  line-height: 1.8;
  margin-bottom: 36px;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.45s both;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  background: var(--gradient-1);
  border: none;
  border-radius: 50px;
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(14,165,233,0.3);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  background: transparent;
  border: 1px solid var(--border-cyan);
  border-radius: 50px;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
}

.btn-secondary:hover {
  background: var(--cyan-glow);
  border-color: var(--cyan);
  transform: translateY(-3px);
}

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid var(--border-glass);
  animation: fadeInUp 0.8s ease 0.6s both;
}

.hero-stat h3 {
  font-size: 2rem;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat p {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* Hero Visual */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-profile-frame {
  position: relative;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  padding: 6px;
  background: var(--gradient-1);
  animation: float 6s ease-in-out infinite;
  box-shadow: 0 8px 40px rgba(14,165,233,0.15);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}

.hero-profile-frame .inner {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.hero-profile-frame .inner .initials {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 5rem;
  font-weight: 800;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  z-index: 2;
}

.hero-profile-frame .inner .profile-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 2;
}

.hero-profile-frame .inner .bg-glow {
  position: absolute;
  width: 200px;
  height: 200px;
  background: var(--cyan-glow);
  border-radius: 50%;
  filter: blur(80px);
}

.hero-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--border-cyan);
  animation: spin 20s linear infinite;
}

.hero-ring.r1 { width: 460px; height: 460px; }
.hero-ring.r2 {
  width: 540px; height: 540px;
  animation-direction: reverse;
  animation-duration: 30s;
  border-color: rgba(124,58,237,0.2);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.hero-floating-icon {
  position: absolute;
  width: 52px; height: 52px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  color: var(--cyan);
  animation: float 5s ease-in-out infinite;
  z-index: 3;
  box-shadow: var(--shadow-card);
}

.fi-1 { top: 10%; right: 5%; animation-delay: 0s; }
.fi-2 { bottom: 18%; left: 2%; animation-delay: 1.5s; }
.fi-3 { bottom: 5%; right: 15%; animation-delay: 3s; }

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.65rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: fadeInUp 2s ease 1.5s both;
}

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

@keyframes scrollLine {
  0%, 100% { transform: scaleY(0.3); opacity: 0.3; }
  50% { transform: scaleY(1); opacity: 1; }
}

/* ----- ABOUT ----- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-image-wrapper {
  position: relative;
}

.about-image-box {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.about-image-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-1);
  z-index: 2;
}

.about-img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.about-image-box:hover .about-img {
  transform: scale(1.03);
}

.about-experience-badge {
  position: absolute;
  bottom: 24px;
  right: 24px;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow-card);
}

.about-experience-badge .num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.about-experience-badge .lbl {
  font-size: 0.7rem;
  color: var(--text-secondary);
  line-height: 1.3;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.about-content h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin-bottom: 16px;
}

.about-content h2 span {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.about-content > p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.about-tags span {
  font-size: 0.8rem;
  font-weight: 500;
  padding: 8px 18px;
  background: var(--cyan-glow);
  border: 1px solid var(--border-cyan);
  border-radius: 50px;
  color: var(--cyan);
  transition: var(--transition);
}

.about-tags span:hover {
  background: var(--cyan-glow-strong);
  transform: translateY(-2px);
}

/* ----- SKILLS CAROUSEL ----- */
.skills-carousel-wrapper {
  overflow: hidden;
  position: relative;
}

.skills-track {
  display: flex;
  gap: 20px;
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  padding: 8px 0;
}

.skill-card {
  min-width: calc(20% - 16px);
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
  box-shadow: var(--shadow-card);
}

.skill-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-1);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.skill-card:hover {
  border-color: var(--border-cyan);
  transform: translateY(-4px);
  box-shadow: var(--shadow-cyan);
}

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

.skill-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--cyan-glow);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  color: var(--cyan);
  margin-bottom: 16px;
}

.skill-card h4 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.skill-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Skills Category Grid (new) */
.skills-category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.skill-cat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.skill-cat-card:hover {
  border-color: var(--border-cyan);
  transform: translateY(-4px);
  box-shadow: var(--shadow-cyan);
}

.skill-cat-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-glass);
}

.skill-cat-header .skill-icon {
  margin-bottom: 0;
  flex-shrink: 0;
}

.skill-cat-header h4 {
  font-size: 1.1rem;
}

.skill-sublist {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.skill-sublist li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

.skill-sublist li:hover {
  color: var(--text-primary);
  transform: translateX(4px);
}

.skill-sublist li i {
  color: var(--cyan);
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* Why Work With Me */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}

.why-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.why-card:hover {
  border-color: var(--border-cyan);
  transform: translateY(-4px);
  box-shadow: var(--shadow-cyan);
}

.why-icon {
  width: 56px; height: 56px;
  margin: 0 auto 16px;
  background: var(--cyan-glow);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--cyan);
  transition: var(--transition);
}

.why-card:hover .why-icon {
  background: var(--gradient-1);
  color: #fff;
}

.why-card h4 {
  font-size: 1.05rem;
  margin-bottom: 10px;
}

.why-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.why-tagline {
  text-align: center;
  margin-top: 40px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
}

.why-tagline .gradient-text {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Skills Nav */
.skills-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 28px;
}

.skills-arrow {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-glass);
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-card);
}

.skills-arrow:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-glow);
}

.skills-dots {
  display: flex;
  gap: 8px;
}

.skills-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  padding: 0;
}

.skills-dot.active {
  background: var(--cyan);
  width: 28px;
  border-radius: 4px;
}

/* ----- TOOLS CAROUSEL ----- */
.tools-carousel-wrapper {
  overflow: hidden;
  position: relative;
  width: 100%;
}

.tools-track {
  display: flex;
  gap: 40px;
  animation: scrollTools 30s linear infinite;
  width: max-content;
}

.tools-track:hover {
  animation-play-state: paused;
}

@keyframes scrollTools {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.tool-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  width: 120px;
  transition: var(--transition);
}

.tool-item:hover {
  transform: translateY(-4px);
}

.tool-icon-wrap {
  width: 64px;
  height: 64px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--cyan);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.tool-item:hover .tool-icon-wrap {
  border-color: var(--border-cyan);
  box-shadow: var(--shadow-cyan);
  background: var(--cyan-glow);
}

.tool-item span {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* ----- CERTIFICATIONS CAROUSEL ----- */
.cert-carousel-wrapper {
  overflow: hidden;
  position: relative;
}

.cert-track {
  display: flex;
  gap: 20px;
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.cert-track .cert-card {
  min-width: calc(33.333% - 14px);
  flex-shrink: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 28px 24px;
  display: flex;
  gap: 20px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.cert-track .cert-card:hover {
  border-color: var(--border-cyan);
  transform: translateY(-4px);
  box-shadow: var(--shadow-cyan);
}

.cert-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.cert-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  padding: 0;
}

.cert-dot.active {
  background: var(--cyan);
  width: 28px;
  border-radius: 4px;
}

/* ----- CERTIFICATIONS (old grid fallback) ----- */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: var(--transition);
  display: flex;
  gap: 20px;
  box-shadow: var(--shadow-card);
}

.cert-card:hover {
  border-color: var(--border-cyan);
  transform: translateY(-4px);
  box-shadow: var(--shadow-cyan);
}

.cert-badge {
  flex-shrink: 0;
  width: 52px; height: 52px;
  background: var(--gradient-1);
  border-radius: 12px;
  display: flex;
  align-items: center; justify-content: center;
  font-size: 1.3rem;
  color: #fff;
}

.cert-info h4 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.cert-info .issuer {
  font-size: 0.8rem;
  color: var(--cyan);
  margin-bottom: 4px;
}

.cert-info .date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ----- PROJECTS ----- */
.project-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 36px;
}

.filter-btn {
  padding: 8px 22px;
  border-radius: 50px;
  border: 1px solid var(--border-glass);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Inter', sans-serif;
}

.filter-btn:hover {
  border-color: var(--border-cyan);
  color: var(--cyan);
}

.filter-btn.active {
  background: var(--gradient-1);
  border-color: transparent;
  color: #fff;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.project-card:hover {
  border-color: var(--border-cyan);
  transform: translateY(-6px);
  box-shadow: var(--shadow-cyan);
}

.project-card.hidden {
  display: none;
}

.project-thumb {
  height: 200px;
  overflow: hidden;
  position: relative;
  background: var(--bg-secondary);
}

.project-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.project-card:hover .project-thumb img {
  transform: scale(1.08);
}

.project-thumb .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.4), transparent 60%);
}

.project-body {
  padding: 28px;
}

.project-body .tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--cyan);
  background: var(--cyan-glow);
  padding: 4px 12px;
  border-radius: 50px;
  margin-bottom: 12px;
}

.project-body h4 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.project-body p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ----- SERVICES ----- */
a.service-card {
  display: block;
  color: inherit;
  text-decoration: none;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  box-shadow: var(--shadow-card);
}

.service-card:hover {
  border-color: var(--border-cyan);
  transform: translateY(-4px);
  box-shadow: var(--shadow-cyan);
}

.service-icon {
  width: 64px; height: 64px;
  margin: 0 auto 20px;
  background: var(--cyan-glow);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  color: var(--cyan);
  transition: var(--transition);
}

.service-card:hover .service-icon {
  background: var(--gradient-1);
  color: #fff;
}

.service-card h4 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.service-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ----- TESTIMONIALS ----- */
.testimonials-wrapper {
  position: relative;
  overflow: hidden;
}

.testimonials-track {
  display: flex;
  gap: 24px;
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.testimonial-card {
  min-width: calc(33.333% - 16px);
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
  flex-shrink: 0;
  box-shadow: var(--shadow-card);
}

.testimonial-card:hover {
  border-color: var(--border-cyan);
}

.testimonial-stars {
  color: #f59e0b;
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.testimonial-card > p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  font-style: italic;
  margin-bottom: 20px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.t-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid var(--border-cyan);
}

.testimonial-author .info h5 {
  font-size: 0.9rem;
}

.testimonial-author .info p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.testimonial-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.testimonial-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  padding: 0;
}

.testimonial-dot.active {
  background: var(--cyan);
  width: 28px;
  border-radius: 4px;
}

.testimonial-nav {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 20px;
}

.testimonial-nav button {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-glass);
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-card);
}

.testimonial-nav button:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-glow);
}

/* ----- CONTACT ----- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin-bottom: 16px;
}

.contact-info h2 span {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.contact-info > p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.contact-item .icon {
  width: 48px; height: 48px;
  background: var(--cyan-glow);
  border: 1px solid var(--border-cyan);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: var(--cyan);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-item .text h5 {
  font-size: 0.9rem;
}

.contact-item .text p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 36px;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.contact-form:hover {
  border-color: var(--border-cyan);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  transition: var(--transition);
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px var(--cyan-glow);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-submit {
  width: 100%;
  padding: 16px;
  background: var(--gradient-1);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Inter', sans-serif;
}

.form-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(14,165,233,0.25);
}

/* ----- CTA BANNER ----- */
.cta-banner {
  background: linear-gradient(135deg, rgba(14,165,233,0.06), rgba(124,58,237,0.05));
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius);
  padding: 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at 50% 50%, var(--cyan-glow) 0%, transparent 50%);
  animation: ctaGlow 8s ease-in-out infinite;
}

@keyframes ctaGlow {
  0%, 100% { opacity: 0.3; transform: translate(0, 0); }
  50% { opacity: 0.6; transform: translate(5%, -5%); }
}

.cta-banner * { position: relative; z-index: 1; }

.cta-banner h2 {
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  margin-bottom: 12px;
  color: var(--text-primary);
}

.cta-banner h2 span {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta-banner p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ----- FOOTER ----- */
footer {
  border-top: 1px solid var(--border-glass);
  padding: 40px 0;
  text-align: center;
  background: #ffffff;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 20px;
}

.footer-social a {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition);
  font-size: 1.1rem;
}

.footer-social a:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-glow);
  transform: translateY(-3px);
}

footer p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ----- WHATSAPP FLOAT ----- */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 60px;
  height: 60px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 2rem;
  z-index: 999;
  box-shadow: 0 4px 20px rgba(37,211,102,0.4);
  transition: var(--transition);
  text-decoration: none;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 30px rgba(37,211,102,0.5);
}

.whatsapp-tooltip {
  position: absolute;
  right: 70px;
  background: #ffffff;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.85rem;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  font-weight: 500;
  box-shadow: var(--shadow-card);
}

.whatsapp-float:hover .whatsapp-tooltip {
  opacity: 1;
  right: 76px;
}

/* ----- SCROLL REVEAL ANIMATION ----- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ----- RESPONSIVE ----- */

/* Tablet Landscape */
@media (max-width: 1100px) {
  .skill-card {
    min-width: calc(25% - 15px);
  }
}

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

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

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

  .hero-visual {
    order: -1;
  }

  .hero-profile-frame {
    width: 260px;
    height: 260px;
  }

  .hero-profile-frame .inner .initials {
    font-size: 3.5rem;
  }

  .hero-ring.r1 { width: 320px; height: 320px; }
  .hero-ring.r2 { width: 380px; height: 380px; }
  .hero-floating-icon { width: 42px; height: 42px; font-size: 1rem; }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .testimonial-card {
    min-width: calc(50% - 12px);
  }

  .skill-card {
    min-width: calc(33.333% - 14px);
  }
}

/* Tablet Portrait */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    padding: 24px;
    gap: 20px;
    flex-direction: column;
    border-bottom: 1px solid var(--border-glass);
    box-shadow: var(--shadow-lg);
  }

  .nav-links.open {
    display: flex;
  }

  .hamburger {
    display: flex;
  }

  .hero {
    padding: 120px 0 60px;
  }

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .hero-stat h3 { font-size: 1.5rem; }
  .hero-stat p { font-size: 0.7rem; }

  .section {
    padding: 70px 0;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .skill-card {
    min-width: calc(50% - 10px);
  }

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

  .testimonial-card {
    min-width: 100%;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .cta-banner {
    padding: 36px 24px;
  }

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

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

  .project-filters {
    gap: 8px;
  }

  .filter-btn {
    font-size: 0.75rem;
    padding: 6px 16px;
  }

  .about-img {
    height: 260px;
  }

  .whatsapp-float {
    width: 52px;
    height: 52px;
    font-size: 1.6rem;
    bottom: 20px;
    right: 20px;
  }

  .whatsapp-tooltip {
    display: none;
  }
}

/* Mobile */
@media (max-width: 480px) {
  .skill-card {
    min-width: 100%;
  }

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

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .hero-profile-frame {
    width: 200px;
    height: 200px;
  }

  .hero-profile-frame .inner .initials {
    font-size: 2.8rem;
  }

  .hero-ring.r1 { width: 260px; height: 260px; }
  .hero-ring.r2 { width: 310px; height: 310px; }

  .container {
    padding: 0 16px;
  }

  .contact-form {
    padding: 24px;
  }

  .about-experience-badge {
    bottom: 16px;
    right: 16px;
    padding: 12px 16px;
  }

  .about-experience-badge .num {
    font-size: 1.5rem;
  }

  .about-experience-badge .lbl {
    font-size: 0.6rem;
  }

  .section {
    padding: 50px 0;
  }

  .cert-card {
    padding: 20px;
  }

  .tool-item {
    width: 90px;
  }

  .tool-icon-wrap {
    width: 52px;
    height: 52px;
    font-size: 1.3rem;
  }

  .tool-item span {
    font-size: 0.7rem;
  }

  .tools-track {
    gap: 28px;
    animation-duration: 20s;
  }
}