/* --------------------------------------------------------------------------
   Variables & reset
   -------------------------------------------------------------------------- */
:root {
  --bg-deep: #0a0e17;
  --bg-card: #111827;
  --bg-card-hover: #151d2e;
  --border: rgba(99, 140, 255, 0.12);
  --text: #e8ecf4;
  --text-muted: #94a3b8;
  --accent: #3b82f6;
  --accent-bright: #60a5fa;
  --accent-glow: rgba(59, 130, 246, 0.35);
  --gradient-start: #2563eb;
  --gradient-end: #7c3aed;
  --header-h: 4.25rem;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-display: "Outfit", var(--font-sans);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg-deep);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

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

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
  width: min(1120px, 100% - 2rem);
  margin-inline: auto;
}

.section {
  padding: clamp(4rem, 10vw, 6.5rem) 0;
  position: relative;
}

.section__header {
  margin-bottom: clamp(2rem, 5vw, 3rem);
  text-align: center;
}

.section__label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: 0.5rem;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section__subtitle {
  margin-top: 0.75rem;
  color: var(--text-muted);
  max-width: 36rem;
  margin-inline: auto;
}

.text-gradient {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* --------------------------------------------------------------------------
   Header / Nav
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(10, 14, 23, 0.75);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}

.header.is-scrolled {
  border-bottom-color: var(--border);
  background: rgba(10, 14, 23, 0.92);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, 100% - 2rem);
  margin-inline: auto;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 600;
  transition: opacity var(--transition);
}

.nav__logo:hover {
  opacity: 0.9;
}

.nav__logo-mark {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  border-radius: 10px;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.nav__logo-text {
  font-size: 0.95rem;
  letter-spacing: -0.02em;
}

@media (max-width: 480px) {
  .nav__logo-text {
    display: none;
  }
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  z-index: 102;
}

.nav__toggle-bar {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav__link {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.nav__link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.nav__link--cta {
  color: #fff;
  background: linear-gradient(135deg, var(--gradient-start), #4f46e5);
  margin-left: 0.25rem;
}

.nav__link--cta:hover {
  color: #fff;
  filter: brightness(1.08);
  box-shadow: 0 8px 24px var(--accent-glow);
}

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

  .nav__menu {
    position: fixed;
    inset: 0;
    top: var(--header-h);
    flex-direction: column;
    justify-content: flex-start;
    padding: 2rem;
    gap: 0.5rem;
    background: var(--bg-deep);
    border-bottom: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  }

  .nav__menu.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav__link {
    width: 100%;
    text-align: center;
    padding: 0.85rem;
    font-size: 1rem;
  }

  .nav__link--cta {
    margin-left: 0;
    margin-top: 0.5rem;
  }

  .nav.is-open .nav__toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav.is-open .nav__toggle-bar:nth-child(2) {
    opacity: 0;
  }

  .nav.is-open .nav__toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition), background var(--transition), border-color var(--transition);
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--gradient-start), #4f46e5);
  box-shadow: 0 8px 28px var(--accent-glow);
}

.btn--primary:hover {
  filter: brightness(1.08);
  box-shadow: 0 12px 36px rgba(59, 130, 246, 0.45);
}

.btn--ghost {
  color: var(--text);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
}

.btn--ghost:hover {
  border-color: rgba(99, 140, 255, 0.35);
  background: rgba(59, 130, 246, 0.1);
}

.btn--small {
  padding: 0.55rem 1.1rem;
  font-size: 0.85rem;
}

.btn--outline {
  color: var(--accent-bright);
  border: 1px solid rgba(59, 130, 246, 0.45);
  background: transparent;
}

.btn--outline:hover {
  background: rgba(59, 130, 246, 0.12);
  border-color: var(--accent-bright);
}

.btn--full {
  width: 100%;
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: var(--header-h);
  position: relative;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59, 130, 246, 0.22), transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(124, 58, 237, 0.12), transparent),
    radial-gradient(ellipse 50% 30% at 0% 80%, rgba(59, 130, 246, 0.1), transparent);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 52rem;
}

.hero__eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: 1rem;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero__tagline {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--text-muted);
  max-width: 36rem;
  margin-bottom: 2rem;
}

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

.hero__scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.hero__scroll-line {
  width: 1px;
  height: 2.5rem;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%,
  100% {
    opacity: 0.4;
    transform: scaleY(0.85);
  }
  50% {
    opacity: 1;
    transform: scaleY(1);
  }
}

@media (max-width: 768px) {
  .hero__scroll {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   Reveal animations
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* --------------------------------------------------------------------------
   About
   -------------------------------------------------------------------------- */
.about__grid {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 768px) {
  .about__grid {
    grid-template-columns: 1fr 1.2fr;
    gap: 3rem;
  }
}

.about__image-wrap {
  max-width: 320px;
  margin-inline: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.about__image {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center;
}

.about__image-wrap:hover {
  transform: translateY(-4px);
  border-color: rgba(59, 130, 246, 0.25);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(59, 130, 246, 0.08);
}

.about__text {
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.about__text:last-child {
  margin-bottom: 0;
}

.about__text strong {
  color: var(--text);
}

/* --------------------------------------------------------------------------
   Skills
   -------------------------------------------------------------------------- */
.skills {
  background: linear-gradient(180deg, transparent 0%, rgba(17, 24, 39, 0.5) 50%, transparent 100%);
}

.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1.25rem;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.25rem;
  text-align: center;
  transition: transform var(--transition), border-color var(--transition), background var(--transition), box-shadow var(--transition);
}

.skill-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: rgba(59, 130, 246, 0.28);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.skill-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  margin-bottom: 1rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-bright);
  background: rgba(59, 130, 246, 0.12);
  border-radius: 12px;
}

.skill-card__icon--react {
  font-size: 1.25rem;
}

.skill-card__svg {
  width: 1.35rem;
  height: 1.35rem;
}

.skill-card__name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.skill-card__desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* --------------------------------------------------------------------------
   Projects
   -------------------------------------------------------------------------- */
.projects__grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .projects__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .projects__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
  }
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: rgba(59, 130, 246, 0.22);
  box-shadow: var(--shadow);
}

.project-card__visual {
  height: 120px;
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.85);
  background: linear-gradient(135deg, #1d4ed8 0%, #5b21b6 100%);
  transition: filter var(--transition);
}

.project-card:hover .project-card__visual {
  filter: brightness(1.08);
}

.project-card__visual--alt {
  background: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
}

.project-card__visual--2 {
  background: linear-gradient(135deg, #7c3aed 0%, #db2777 100%);
}

.project-card__visual--3 {
  background: linear-gradient(135deg, #059669 0%, #2563eb 100%);
}

.project-card__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.project-card__desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  flex: 1;
  margin-bottom: 1.25rem;
  line-height: 1.55;
}

.project-card__btn {
  align-self: flex-start;
}

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */
.contact__layout {
  display: grid;
  gap: 2.5rem;
  max-width: 720px;
  margin-inline: auto;
}

@media (min-width: 768px) {
  .contact__layout {
    grid-template-columns: 1fr auto;
    max-width: 900px;
    align-items: start;
  }
}

.contact__form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 4vw, 2rem);
  box-shadow: var(--shadow);
}

.form__group {
  margin-bottom: 1.25rem;
}

.form__label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text-muted);
}

.form__input {
  width: 100%;
  padding: 0.75rem 1rem;
  font: inherit;
  color: var(--text);
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form__input::placeholder {
  color: rgba(148, 163, 184, 0.55);
}

.form__input:hover {
  border-color: rgba(99, 140, 255, 0.25);
}

.form__input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form__textarea {
  resize: vertical;
  min-height: 120px;
}

.form__status {
  font-size: 0.875rem;
  margin-bottom: 1rem;
  min-height: 1.25em;
}

.form__status.is-success {
  color: #34d399;
}

.form__status.is-error {
  color: #f87171;
}

.contact__aside {
  padding: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(17, 24, 39, 0.6);
}

.contact__aside-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.social {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.social__link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  font-weight: 500;
  font-size: 0.95rem;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.social__link:hover {
  background: rgba(59, 130, 246, 0.12);
  border-color: rgba(59, 130, 246, 0.35);
  transform: translateX(4px);
}

.social__icon {
  width: 1.35rem;
  height: 1.35rem;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  background: rgba(10, 14, 23, 0.98);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  text-align: center;
}

@media (min-width: 640px) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer__name {
  font-weight: 600;
  font-size: 0.95rem;
}

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

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero__scroll-line {
    animation: none;
  }

  .btn:active,
  .skill-card:hover,
  .project-card:hover,
  .about__image-wrap:hover,
  .social__link:hover {
    transform: none;
  }
}