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

:root {
  --accent: #6366F1;
  --accent-light: #818CF8;
  --accent-bg: #EEF2FF;
  --text-primary: #0F172A;
  --text-secondary: #64748B;
  --text-muted: #94A3B8;
  --surface: #F8FAFC;
  --border: #E2E8F0;
  --white: #FFFFFF;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,.08);
  --shadow-lg: 0 16px 40px rgba(0,0,0,.10);
  --radius: 16px;
  --radius-sm: 8px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--text-primary);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ===== UTILITIES ===== */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 6rem 0;
}

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

.section-label {
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .75rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--text-primary);
  letter-spacing: -.02em;
}

.section-header {
  margin-bottom: 3rem;
}

.gradient-text {
  background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 50%, #A78BFA 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1.5rem;
  border-radius: 50px;
  font-size: .9rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all .2s ease;
  text-decoration: none;
  border: 2px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: #4F46E5;
  border-color: #4F46E5;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(99,102,241,.35);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.btn-sm {
  padding: .5rem 1.1rem;
  font-size: .82rem;
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-sm:hover {
  background: #4F46E5;
  border-color: #4F46E5;
}

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

/* ===== NAVIGATION ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, box-shadow .3s;
}

.nav.scrolled {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  max-width: 1160px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
}

.nav-logo {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -.02em;
  margin-right: auto;
}

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

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: .88rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color .2s;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: .25rem;
  margin-left: auto;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: .3s;
}

.nav-mobile {
  display: none;
  flex-direction: column;
  padding: 1rem 1.5rem 1.25rem;
  border-top: 1px solid var(--border);
}

.nav-mobile-link {
  padding: .65rem 0;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: .92rem;
  transition: color .2s;
}

.nav-mobile-link:hover {
  color: var(--accent);
}

@media (max-width: 720px) {
  .nav-links, .nav > .nav-inner > .btn-sm { display: none; }
  .nav-toggle { display: flex; }
  .nav-mobile.open { display: flex; }
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  position: relative;
  overflow: hidden;
  padding-top: 5rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .12;
}

.blob-1 {
  width: 600px;
  height: 600px;
  background: #6366F1;
  top: -150px;
  right: -100px;
  animation: float 8s ease-in-out infinite;
}

.blob-2 {
  width: 400px;
  height: 400px;
  background: #8B5CF6;
  bottom: 0;
  left: -100px;
  animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.04); }
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-top: 2rem;
  padding-bottom: 2rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--accent-bg);
  color: var(--accent);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .04em;
  padding: .35rem .9rem;
  border-radius: 50px;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(99,102,241,.2);
}

.badge::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22C55E;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .6; transform: scale(.85); }
}

.hero-title {
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.03em;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 480px;
  margin-bottom: 2.5rem;
  font-weight: 400;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-pricing {
  margin-top: 1.25rem;
  font-size: .9rem;
  color: var(--text-secondary);
}

.hero-pricing strong {
  color: var(--text-primary);
  font-weight: 600;
}

.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.scroll-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: bounce 1.8s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); opacity: .5; }
  50% { transform: translateY(8px); opacity: 1; }
}

/* ===== ABOUT ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
  margin-bottom: 4rem;
}

.about-text .section-title {
  margin-bottom: 1.25rem;
}

.about-body {
  font-size: .98rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: .75rem;
}

.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.skill-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  transition: box-shadow .2s, transform .2s;
}

.skill-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.skill-icon {
  font-size: 1.4rem;
  margin-bottom: .6rem;
}

.skill-card h3 {
  font-size: .9rem;
  font-weight: 700;
  margin-bottom: .3rem;
  color: var(--text-primary);
}

.skill-card p {
  font-size: .82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.tech-row {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
}

.tech-label {
  font-size: .78rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: .06em;
  text-transform: uppercase;
  white-space: nowrap;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.tag {
  display: inline-block;
  padding: .3rem .75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: .78rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.tag-sm {
  font-size: .72rem;
  padding: .2rem .6rem;
}

/* ===== PROJECTS ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.75rem;
}

.project-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow .25s, transform .25s;
}

.project-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.project-image {
  position: relative;
  height: 210px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15,23,42,.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity .25s;
  z-index: 2;
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-link-btn {
  padding: .65rem 1.4rem;
  background: var(--white);
  color: var(--text-primary);
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 600;
  text-decoration: none;
  transition: background .2s;
}

.project-link-btn:hover {
  background: var(--accent-bg);
}

.project-iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 1280px;
  height: 700px;
  transform: scale(0.3);
  transform-origin: top left;
  pointer-events: none;
  border: none;
  z-index: 1;
}

.project-info {
  padding: 1.5rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-bottom: .75rem;
}

.project-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: .5rem;
  color: var(--text-primary);
}

.project-desc {
  font-size: .85rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===== CONTACT ===== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 5rem;
  align-items: start;
}

.contact-left .section-title {
  margin-bottom: 1rem;
}

.contact-details {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: .75rem;
}

.contact-detail-item {
  display: flex;
  align-items: center;
  gap: .85rem;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: .88rem;
  font-weight: 500;
  transition: color .2s;
}

.contact-detail-item:hover {
  color: var(--accent);
}

.contact-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--accent-bg);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .85rem;
  font-weight: 700;
  flex-shrink: 0;
}

.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.form-group label {
  font-size: .8rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  padding: .7rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: .88rem;
  color: var(--text-primary);
  background: var(--white);
  transition: border-color .2s, box-shadow .2s;
  outline: none;
  resize: vertical;
}

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

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99,102,241,.12);
}

.form-note {
  font-size: .82rem;
  color: #22C55E;
  text-align: center;
  min-height: 1.2em;
}

/* ===== FOOTER ===== */
.footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-copy {
  font-size: .82rem;
  color: var(--text-muted);
}

.back-to-top {
  font-size: .82rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color .2s;
}

.back-to-top:hover {
  color: var(--accent);
}

/* ===== ANIMATIONS ===== */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 640px) {
  .section { padding: 4rem 0; }

  .hero-title { font-size: 2.6rem; }

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

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

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

  .tech-row { flex-direction: column; align-items: flex-start; gap: .75rem; }

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