/* ===================================
   VARIABLES
   =================================== */
:root {
  --color-bg: #0B0F19;
  --color-bg-secondary: #111827;
  --color-card: #1F2937;
  --color-text: #E5E7EB;
  --color-text-muted: #9CA3AF;
  --color-accent: #38BDF8;
  --color-accent-hover: #0EA5E9;
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --section-padding: 100px;
  --container-width: 1200px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.12), transparent 36rem), var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

/* ===================================
   UTILITY
   =================================== */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.skip-link {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 2000;
  padding: 10px 16px;
  background: var(--color-accent);
  color: var(--color-bg);
  border-radius: 8px;
  font-weight: 700;
  transform: translateY(-160%);
}
.skip-link:focus {
  transform: translateY(0);
}

.section {
  padding: var(--section-padding) 0;
}

.section__title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 60px;
  position: relative;
}
.section__title::after {
  content: "";
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--color-accent);
}

/* ===================================
   HEADER
   =================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(11, 15, 25, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition);
}
.header.scrolled {
  padding: 15px 0;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

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

.nav__logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
}
.nav__logo span {
  color: var(--color-text);
}

.nav__list {
  display: flex;
  gap: 40px;
}

.nav__link {
  font-size: 1rem;
  font-weight: 500;
  position: relative;
}
.nav__link::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: var(--transition);
}
.nav__link:hover {
  color: var(--color-accent);
}
.nav__link:hover::after {
  width: 100%;
}

.nav__toggle,
.nav__close {
  display: none;
}

/* ===================================
   BUTTONS
   =================================== */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}
.btn--primary {
  background: var(--color-accent);
  color: var(--color-bg);
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
}
.btn--outline {
  background: transparent;
  border: 2px solid var(--color-accent);
  color: var(--color-accent);
}
.btn--outline:hover {
  background: var(--color-accent);
  color: var(--color-bg);
  transform: translateY(-2px);
}

/* ===================================
   HERO
   =================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
}

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

.hero__greeting {
  font-size: 1.25rem;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.hero__title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 15px;
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1.3;
  min-height: 1.3em;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.hero__description {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: 30px;
  max-width: 500px;
}

.hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}
.hero__badges li {
  padding: 7px 14px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 999px;
  color: var(--color-accent);
  font-size: 0.9rem;
  font-weight: 600;
}

.hero__buttons {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.hero__image-wrapper {
  position: relative;
  width: 350px;
  height: 350px;
  margin: 0 auto;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--color-accent);
  box-shadow: 0 0 40px rgba(56, 189, 248, 0.3);
}
.hero__image-wrapper::after {
  content: "";
  position: absolute;
  inset: 12px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  pointer-events: none;
}

.hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===================================
   ABOUT
   =================================== */
.about {
  background-color: var(--color-bg-secondary);
}

.about__text {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}
.about__text p {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
  line-height: 1.8;
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 50px;
}

.about__highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 36px;
}

.highlight {
  padding: 18px;
  background: rgba(31, 41, 55, 0.7);
  border: 1px solid rgba(156, 163, 175, 0.14);
  border-radius: 10px;
  text-align: left;
}

.highlight__label {
  display: block;
  margin-bottom: 4px;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.highlight__value {
  color: var(--color-text);
  font-size: 1rem;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 30px;
  background: var(--color-card);
  border-radius: 12px;
  transition: var(--transition);
}
.stat:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(56, 189, 248, 0.1);
}

.stat__number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.stat__label {
  font-size: 1rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* ===================================
   SKILLS
   =================================== */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.skill-card {
  background: var(--color-card);
  padding: 40px 30px;
  border-radius: 8px;
  text-align: center;
  transition: var(--transition);
  border: 1px solid rgba(156, 163, 175, 0.12);
}
.skill-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-accent);
  box-shadow: 0 10px 30px rgba(56, 189, 248, 0.15);
}

.skill-card__icon {
  font-size: 3rem;
  margin-bottom: 20px;
}

.skill-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 15px;
  color: var(--color-text);
}

.skill-card__desc {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===================================
   PORTFOLIO
   =================================== */
.portfolio {
  background-color: var(--color-bg-secondary);
}

.portfolio__swiper {
  padding-bottom: 60px;
}

.portfolio__swiper .swiper-slide {
  height: auto;
}

.project-card {
  background: var(--color-card);
  border-radius: 8px;
  overflow: hidden;
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(156, 163, 175, 0.12);
  cursor: pointer;
  position: relative;
}
.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
  border-color: var(--color-accent);
}
.project-card::after {
  content: "↗";
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  background: rgba(56, 189, 248, 0.9);
  color: var(--color-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  opacity: 0;
  transform: scale(0.8);
  transition: var(--transition);
}
.project-card:hover::after {
  opacity: 1;
  transform: scale(1);
}

.project-card__image {
  width: 100%;
  height: 250px;
  overflow: hidden;
}
.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}
.project-card__image:hover img {
  transform: scale(1.05);
}

.project-card__content {
  padding: 25px;
  display: flex;
  flex-direction: column;
  min-height: 300px;
  flex: 1;
}

.project-card__title {
  font-size: 1.375rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-text);
}

.project-card__desc {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
  line-height: 1.6;
}

.project-card__meta {
  margin-bottom: 18px;
  color: var(--color-text);
  font-size: 0.95rem;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
}

.tag {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(56, 189, 248, 0.1);
  color: var(--color-accent);
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 500;
}

/* Swiper Pagination */
.swiper-pagination {
  bottom: 0 !important;
}
.swiper-pagination .swiper-pagination-bullet {
  background: var(--color-text-muted);
  opacity: 0.5;
  width: 10px;
  height: 10px;
}
.swiper-pagination .swiper-pagination-bullet.swiper-pagination-bullet-active {
  background: var(--color-accent);
  opacity: 1;
}

/* Portfolio GitHub Link */
.portfolio__github {
  text-align: center;
  margin-top: 40px;
}

.btn--github {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 32px;
  background: transparent;
  border: 2px solid rgba(156, 163, 175, 0.2);
  border-radius: 8px;
  color: var(--color-text-muted);
  font-size: 1rem;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
}
.btn--github svg {
  width: 20px;
  height: 20px;
  fill: var(--color-text-muted);
  transition: var(--transition);
}
.btn--github:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(56, 189, 248, 0.08);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(56, 189, 248, 0.15);
}
.btn--github:hover svg {
  fill: var(--color-accent);
}

/* ===================================
   CONTACT
   =================================== */
.contact__content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.contact__text {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: 40px;
  line-height: 1.8;
}

.contact__links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.contact__link {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 15px;
  padding: 20px 30px;
  background: var(--color-card);
  border: 1px solid rgba(156, 163, 175, 0.12);
  border-radius: 8px;
  font-size: 0.95rem;
  color: var(--color-text);
  transition: var(--transition);
  text-align: left;
}
.contact__link:hover {
  background: rgba(56, 189, 248, 0.1);
  color: var(--color-accent);
  transform: translateY(-4px);
}
.contact__link span:last-child {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  overflow-wrap: anywhere;
}
.contact__link strong {
  color: var(--color-text);
}

.contact__icon {
  font-size: 1.5rem;
}

/* ===================================
   FOOTER
   =================================== */
.footer {
  padding: 30px 0;
  background: var(--color-bg-secondary);
  text-align: center;
}

.footer__text {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* ===================================
   ANIMATIONS
   =================================== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 992px) {
  :root {
    --section-padding: 80px;
  }
  .hero__content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero__title {
    font-size: 2.75rem;
  }
  .hero__buttons {
    justify-content: center;
  }
  .hero__badges {
    justify-content: center;
  }
  .hero__image-wrapper {
    width: 280px;
    height: 280px;
    transform: none !important;
    transition: none;
  }
  .hero__image.fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .about__stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .contact__links {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
  }
  .nav__toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
  }
  .nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background: var(--color-bg-secondary);
    padding: 80px 30px 30px;
    transition: var(--transition);
    box-shadow: -5px 0 20px rgba(0, 0, 0, 0.3);
  }
  .nav__menu.active {
    right: 0;
  }
  .nav__list {
    flex-direction: column;
    gap: 25px;
  }
  .nav__close {
    display: block;
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 2rem;
    color: var(--color-text);
  }
  .section__title {
    font-size: 2rem;
    margin-bottom: 40px;
  }
  .hero__title {
    font-size: 2.25rem;
  }
  .hero__subtitle {
    font-size: 1.5rem;
  }
  .about__stats {
    grid-template-columns: 1fr;
  }
  .about__highlights {
    grid-template-columns: 1fr;
  }
  .skills__grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 576px) {
  :root {
    --section-padding: 60px;
  }
  .hero__title {
    font-size: 2rem;
  }
  .hero__buttons {
    flex-direction: column;
  }
  .hero__image-wrapper {
    width: min(260px, 78vw);
    height: min(260px, 78vw);
  }
  .btn {
    width: 100%;
  }
  .stat {
    padding: 20px;
  }
  .stat__number {
    font-size: 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
  .fade-in {
    opacity: 1;
    transform: none;
  }
}