*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --font-primary: 'Inter', system-ui, sans-serif;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --accent: #7c3aed;
  --accent-hover: #6d28d9;
  --accent-glow: rgba(124, 58, 237, 0.25);
  --accent-soft: rgba(124, 58, 237, 0.08);
}

[data-theme="dark"] {
  --bg: #0a0a0f;
  --bg-surface: #12121a;
  --bg-card: #1a1a26;
  --bg-card-hover: #222232;
  --text: #e8e8f0;
  --text-muted: #9898b0;
  --border: rgba(255, 255, 255, 0.06);
  --shadow: rgba(0, 0, 0, 0.4);
  --nav-bg: rgba(10, 10, 15, 0.85);
  --gradient-start: #7c3aed;
  --gradient-end: #2563eb;
}

[data-theme="light"] {
  --bg: #f5f4fa;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f0eef8;
  --text: #1a1a2e;
  --text-muted: #5a5a72;
  --border: rgba(0, 0, 0, 0.08);
  --shadow: rgba(0, 0, 0, 0.08);
  --nav-bg: rgba(245, 244, 250, 0.9);
  --gradient-start: #7c3aed;
  --gradient-end: #2563eb;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent-hover);
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section__title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section__subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 60px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* NAVBAR */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
  border-bottom: none;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 64px;
  overflow: visible;
}

.navbar--scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.navbar__menu {
  display: flex;
  list-style: none;
  gap: 4px;
  margin: 0;
  padding: 0;
}

.navbar__menu.open {
  display: flex;
}

.navbar__link {
  color: #ffffff;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
  display: block;
  white-space: nowrap;
  position: relative;
  z-index: 1002;
}

.navbar--scrolled .navbar__link {
  color: var(--text-muted);
}

.navbar__link:hover {
  color: var(--accent);
  background: var(--accent-soft);
}

.navbar--scrolled .navbar__link:hover {
  color: var(--accent);
  background: var(--accent-soft);
}

.navbar__link--active {
  color: var(--accent);
  background: var(--accent-soft);
}

.navbar--scrolled .navbar__link--active {
  color: var(--accent);
  background: var(--accent-soft);
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
  z-index: 1002;
}

/* THEME TOGGLE */
.theme-toggle {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  color: #ffffff;
  transition: all var(--transition);
  position: relative;
  z-index: 1002;
}

.navbar--scrolled .theme-toggle {
  background: var(--bg-card);
  border-color: var(--border);
  color: var(--text);
}

.theme-toggle:hover {
  transform: scale(1.1);
  border-color: var(--accent);
}

/* LANG TOGGLE */
.lang-toggle {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
  color: #ffffff;
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  z-index: 1002;
}

.navbar--scrolled .lang-toggle {
  background: var(--bg-card);
  border-color: var(--border);
  color: var(--text);
}

.lang-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* HAMBURGER */
.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  position: relative;
  z-index: 1003;
}

.navbar__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #ffffff;
  border-radius: 2px;
  transition: all var(--transition);
}

.navbar--scrolled .navbar__hamburger span {
  background: var(--text);
}

/* HERO */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
  background: url(../assets/hero.jpeg) center / cover no-repeat;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 10, 15, 0.85), rgba(10, 10, 15, 0.7));
  z-index: 1;
}

.hero__content {
  max-width: 560px;
  z-index: 2;
  position: relative;
}

.hero__greeting {
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 16px;
  color: #ffffff;
}

.hero__subtitle {
  font-size: 1.3rem;
  color: #b0b0cc;
  margin-bottom: 20px;
}

.hero__description {
  color: #b0b0cc;
  font-size: 1.05rem;
  margin-bottom: 36px;
  max-width: 480px;
}

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

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition);
  cursor: pointer;
}

.btn--primary {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #fff;
  border: none;
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.btn--outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}

.btn--outline:hover {
  background: var(--accent-soft);
  transform: translateY(-2px);
}

/* ABOUT */
.about {
  background: var(--bg-surface);
}

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

.about__text p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.about__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.about__stats {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.stat {
  text-align: center;
  padding: 24px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: transform var(--transition);
}

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

.stat__number {
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
}

.stat__label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* PROJECTS */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 12px 40px var(--shadow);
}

.project-card.featured {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-soft);
}

.project-card__badge {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.project-card__title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.project-card__desc {
  color: var(--text-muted);
  margin-bottom: 20px;
  font-size: 0.95rem;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
}

.project-card__link {
  font-weight: 600;
  font-size: 0.9rem;
}

/* CASE STUDY */
.case-study__point {
  display: flex;
  gap: 24px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.case-study__point:hover {
  background: var(--accent-soft);
  border-radius: var(--radius-sm);
  padding-left: 16px;
}

.case-study__point:last-child {
  border-bottom: none;
}

.case-study__num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  min-width: 60px;
  opacity: 0.5;
}

.case-study__heading {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--accent);
}

.case-study__text {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* SKILLS */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 16px;
}

.skill {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 16px;
  text-align: center;
  transition: all var(--transition);
  cursor: default;
}

.skill:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px var(--shadow);
}

.skill__icon {
  display: block;
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.skill__name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
}

/* CONTACT */
.contact__grid {
  display: flex;
  justify-content: center;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-weight: 500;
  transition: all var(--transition);
}

.contact__item:hover {
  border-color: var(--accent);
  transform: translateX(4px);
  color: var(--accent);
}

.contact__icon {
  font-size: 1.2rem;
}

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

.footer__text {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* TAGS */
.tag {
  display: inline-block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  transition: all var(--transition);
}

.tag:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.tag--sm {
  font-size: 0.72rem;
  padding: 3px 10px;
}

/* SCROLL REVEAL */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* RESPONSIVE */
@media (max-width: 768px) {
  .navbar {
    height: 56px;
    padding: 0 16px;
    overflow: visible;
  }

  .navbar__menu {
    display: none !important;
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px 16px;
    border-bottom: none;
    gap: 8px;
    z-index: 1001;
    overflow-y: auto;
    height: calc(100vh - 56px);
    width: 100%;
  }

  .navbar__menu.open {
    display: flex !important;
  }

  .navbar__link {
    font-size: 1rem;
    padding: 16px 20px;
    color: #ffffff;
    min-height: 48px;
    display: flex;
    align-items: center;
    z-index: 1002;
  }

  .navbar--scrolled .navbar__link {
    color: var(--text-muted);
  }

  .navbar__hamburger {
    display: flex;
    z-index: 1003;
  }

  .hero {
    flex-direction: column;
    text-align: center;
    padding: 100px 24px 60px;
  }

  .hero__content {
    align-items: center;
    max-width: 100%;
  }

  .hero__description {
    max-width: 100%;
    font-size: 1rem;
  }

  .hero__subtitle {
    font-size: 1.1rem;
  }

  .hero__actions {
    justify-content: center;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.95rem;
  }

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

  .about__stats {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }

  .stat {
    min-width: 100px;
    padding: 16px;
  }

  .stat__number {
    font-size: 2rem;
  }

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

  .project-card {
    padding: 24px;
  }

  .skills__grid {
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    gap: 12px;
  }

  .skill {
    padding: 16px 12px;
  }

  .skill__icon {
    font-size: 1.3rem;
  }

  .skill__name {
    font-size: 0.75rem;
  }

  .section__title {
    font-size: 2rem;
  }

  .section {
    padding: 80px 0;
  }

  .case-study__point {
    flex-direction: column;
    gap: 8px;
    padding: 24px 0;
  }

  .case-study__num {
    min-width: auto;
    font-size: 1.5rem;
  }

  .contact__info {
    gap: 10px;
  }

  .contact__item {
    padding: 14px 18px;
  }
}

@media (max-width: 480px) {
  .navbar {
    padding: 0 12px;
  }

  .hero__title {
    font-size: 1.8rem;
  }

  .hero__subtitle {
    font-size: 1rem;
  }

  .hero__description {
    font-size: 0.95rem;
  }

  .skills__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

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

  .stat {
    width: 100%;
    max-width: 200px;
  }

  .btn {
    padding: 12px 20px;
    font-size: 0.9rem;
    width: 100%;
    justify-content: center;
  }

  .hero__actions {
    flex-direction: column;
    width: 100%;
  }

  .hero__actions .btn {
    width: 100%;
  }
}

/* Large desktop adjustments */
@media (min-width: 1200px) {
  .navbar {
    padding: 0 32px;
  }
}