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

:root {
  --sky: #38bdf8;
  --violet: #818cf8;
  --purple: #a78bfa;
  --bg: #04050f;
  --bg2: rgba(255,255,255,0.03);
  --card: rgba(255,255,255,0.04);
  --border: rgba(255,255,255,0.08);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --radius: 16px;
  --radius-sm: 10px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', 'Segoe UI', sans-serif;
  overflow-x: hidden;
  line-height: 1.7;
}

/* ===================== STAR CANVAS ===================== */
#stars {
  position: fixed;
  top: 0; left: 0;
  z-index: 0;
  pointer-events: none;
}

/* ===================== NAVBAR ===================== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px 8%;
  transition: background 0.4s, backdrop-filter 0.4s, padding 0.3s, border-bottom 0.3s;
}

#navbar.scrolled {
  background: rgba(4,5,15,0.85);
  backdrop-filter: blur(20px);
  padding: 14px 8%;
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: white;
}

.dot { color: var(--sky); }

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  margin-left: 2rem;
  transition: color 0.2s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--sky);
  border-radius: 2px;
  transition: width 0.3s;
}

.nav-links a:hover,
.nav-links a.active { color: white; }

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

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 768px) {
  .hamburger { display: flex; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: rgba(4,5,15,0.97);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 8%;
    flex-direction: column;
    gap: 1.2rem;
  }

  .nav-links.open { display: flex; }
  .nav-links a { margin-left: 0; font-size: 1rem; }
}

/* ===================== SECTIONS ===================== */
section {
  position: relative;
  z-index: 1;
  padding: 130px 8%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--sky);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 2.5rem;
  background: linear-gradient(135deg, #fff 60%, var(--muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===================== HERO ===================== */
#hero {
  text-align: center;
  align-items: center;
  gap: 0;
}

.hero-content { max-width: 750px; }

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 50px;
  background: rgba(56,189,248,0.1);
  border: 1px solid rgba(56,189,248,0.25);
  color: var(--sky);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  animation: pulse-badge 2.5s ease-in-out infinite;
}

@keyframes pulse-badge {
  0%, 100% { box-shadow: 0 0 0 0 rgba(56,189,248,0.3); }
  50% { box-shadow: 0 0 0 8px rgba(56,189,248,0); }
}

#hero h1 {
  font-size: clamp(2.8rem, 8vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -2px;
  color: white;
  margin-bottom: 0.5rem;
}

.gradient-text {
  background: linear-gradient(135deg, var(--sky), var(--violet), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

#hero h2 {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  font-weight: 400;
  color: var(--muted);
  min-height: 50px;
  margin-top: 0.5rem;
}

.cursor {
  display: inline-block;
  color: var(--sky);
  animation: blink 0.9s step-end infinite;
}

@keyframes blink { 50% { opacity: 0; } }

.hero-sub {
  color: var(--muted);
  font-size: 1rem;
  margin-top: 1rem;
  letter-spacing: 0.5px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

.btn-primary {
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--sky), var(--violet));
  color: #fff;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(56,189,248,0.35);
}

.btn-ghost {
  padding: 13px 32px;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 50px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}

.btn-ghost:hover {
  border-color: rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.05);
  transform: translateY(-3px);
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px; height: 38px;
  border: 2px solid rgba(255,255,255,0.2);
  border-radius: 20px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}

.scroll-dot {
  width: 4px; height: 8px;
  background: var(--sky);
  border-radius: 4px;
  animation: scroll-bounce 1.8s ease-in-out infinite;
}

@keyframes scroll-bounce { 0%,100%{transform:translateY(0);opacity:1} 80%{transform:translateY(12px);opacity:0} }

/* ===================== ABOUT ===================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.about-text p {
  color: var(--muted);
  margin-bottom: 1rem;
  font-size: 1.05rem;
}

.about-text strong { color: var(--sky); font-weight: 600; }

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color 0.2s, transform 0.2s;
}

.stat-card:hover {
  border-color: rgba(56,189,248,0.3);
  transform: translateY(-4px);
}

.stat-num {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--sky);
  letter-spacing: -1px;
  line-height: 1;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 500;
}

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; }
}

/* ===================== TOOLS TABS ===================== */
.tools-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 8px 20px;
  border-radius: 50px;
  border: 1px solid var(--border);
  background: none;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.tab-btn:hover { border-color: rgba(255,255,255,0.2); color: var(--text); }

.tab-btn.active {
  background: linear-gradient(135deg, var(--sky), var(--violet));
  border-color: transparent;
  color: white;
}

/* ===================== SKILL GRID ===================== */
.skill-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 20px;
}

.skill-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  cursor: default;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(56,189,248,0.06), transparent 70%);
  opacity: 0;
  transition: opacity 0.3s;
}

.skill-card:hover { transform: translateY(-8px); }
.skill-card:hover::before { opacity: 1; }

.skill-icon-wrap {
  font-size: 2.5rem;
  margin-bottom: 12px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.skill-icon-wrap i { font-size: 2.5rem; }

.skill-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: white;
  margin-bottom: 6px;
}

.skill-card p {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.5;
  margin-bottom: 12px;
}

.skill-bar {
  width: 100%;
  height: 3px;
  background: rgba(255,255,255,0.08);
  border-radius: 3px;
  overflow: hidden;
  margin-top: auto;
}

.skill-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--sky), var(--violet));
  border-radius: 3px;
  width: 0;
  transition: width 1.2s cubic-bezier(0.4,0,0.2,1);
}

.skill-fill.animate { width: inherit !important; }

/* ===================== PERSONAL SKILLS ===================== */
.personal-skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.ps-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  transition: transform 0.3s, border-color 0.3s;
}

.ps-card:hover {
  transform: translateY(-6px);
  border-color: rgba(56,189,248,0.25);
}

.ps-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.ps-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: white;
  margin-bottom: 0.5rem;
}

.ps-card p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ===================== PROJECTS ===================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: rgba(56,189,248,0.3);
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.project-coming { border-style: dashed; }

.project-top {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.project-tag {
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(56,189,248,0.12);
  color: var(--sky);
  border: 1px solid rgba(56,189,248,0.2);
}

.project-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: white;
  letter-spacing: -0.3px;
}

.project-card p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.65;
  flex: 1;
}

.project-footer {
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.project-tech {
  font-size: 0.78rem;
  color: var(--violet);
  font-weight: 500;
  letter-spacing: 0.5px;
}

/* ===================== CONTACT ===================== */
.contact-sub {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 500px;
  margin-bottom: 2.5rem;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  transition: transform 0.2s, border-color 0.2s, background 0.2s;
  min-width: 160px;
}

.contact-card:hover {
  transform: translateY(-4px);
  border-color: rgba(56,189,248,0.3);
  background: rgba(56,189,248,0.06);
  color: white;
}

.contact-icon { font-size: 1.2rem; }

.contact-arrow {
  margin-left: auto;
  color: var(--muted);
  font-size: 1rem;
  transition: transform 0.2s;
}

.contact-card:hover .contact-arrow { transform: translate(2px, -2px); color: var(--sky); }

/* ===================== CV BUTTON ===================== */
.cv-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: linear-gradient(135deg, var(--sky), var(--violet));
  padding: 12px 22px;
  border-radius: 50px;
  color: white;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 8px 24px rgba(56,189,248,0.3);
  transition: transform 0.2s, box-shadow 0.2s;
  animation: pulse-cv 3s ease-in-out infinite;
}

@keyframes pulse-cv {
  0%,100%{box-shadow:0 8px 24px rgba(56,189,248,0.3)}
  50%{box-shadow:0 8px 36px rgba(56,189,248,0.55)}
}

.cv-btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(56,189,248,0.45);
  animation: none;
}

/* ===================== FOOTER ===================== */
footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 24px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

footer strong { color: var(--text); }
.footer-year { color: rgba(255,255,255,0.2); }

/* ===================== RESPONSIVE ===================== */
@media (max-width: 768px) {
  section { padding: 100px 5%; }
  .skill-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
  .personal-skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-links { flex-direction: column; }
  .contact-card { min-width: unset; }
}