/* === Refined theme: professional, balanced, versatile === */
:root {
  --bg: #fafaf9;
  --bg-soft: #f5f5f4;
  --text: #1c1917;
  --text-muted: #57534e;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-soft: rgba(79, 70, 229, 0.12);
  --border: rgba(28, 25, 23, 0.08);
  --creative-bar: rgba(79, 70, 229, 0.2);
  --shadow: 0 4px 24px rgba(28, 25, 23, 0.06);
  --btn-bg: #4f46e5;
  --btn-hover: #4338ca;
  --header-height: 76px;
  --skeleton-base: rgba(28, 25, 23, 0.08);
  --skeleton-shine: rgba(255, 255, 255, 0.7);
}

[data-theme="dark"] {
  --bg: #0c0a09;
  --bg-soft: #1c1917;
  --text: #fafaf9;
  --text-muted: #a8a29e;
  --accent: #818cf8;
  --accent-hover: #a5b4fc;
  --accent-soft: rgba(129, 140, 248, 0.15);
  --border: rgba(250, 250, 249, 0.08);
  --creative-bar: rgba(129, 140, 248, 0.25);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
  --btn-bg: #4f46e5;
  --btn-hover: #6366f1;
  --skeleton-base: rgba(250, 250, 249, 0.1);
  --skeleton-shine: rgba(250, 250, 249, 0.2);
}

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

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

body {
  font-family: 'DM Sans', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

html.is-loading body {
  overflow: hidden;
}

html.is-loading .main-container {
  visibility: hidden;
}

html.is-loading .skip-link {
  visibility: hidden;
}

.site-preloader {
  position: fixed;
  inset: 0;
  z-index: 1500;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

html.is-loading .site-preloader {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.skeleton-shell {
  width: 100%;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.skeleton-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 6%;
  border-bottom: 1px solid var(--border);
}

.skeleton-chip,
.skeleton-line,
.skeleton-button,
.skeleton-avatar,
.skeleton-circle,
.skeleton-social-dot {
  position: relative;
  overflow: hidden;
  background: var(--skeleton-base);
}

.skeleton-chip::after,
.skeleton-line::after,
.skeleton-button::after,
.skeleton-avatar::after,
.skeleton-circle::after,
.skeleton-social-dot::after {
  content: '';
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent 10%, var(--skeleton-shine) 50%, transparent 90%);
  animation: skeleton-shimmer 1.2s ease-in-out infinite;
}

.skeleton-chip {
  width: 170px;
  height: 16px;
  border-radius: 999px;
}

.skeleton-chip-small {
  width: 90px;
}

.skeleton-top-actions {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.skeleton-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.skeleton-hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3.5rem;
  align-items: center;
  padding: 5.5% 6% 6%;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

.skeleton-copy {
  display: grid;
  gap: 1rem;
}

.skeleton-line {
  height: 18px;
  border-radius: 8px;
  width: min(480px, 100%);
}

.skeleton-title {
  height: clamp(48px, 9vw, 88px);
  width: min(540px, 100%);
  border-radius: 16px;
}

.skeleton-line-short {
  width: min(360px, 85%);
}

.skeleton-button {
  margin-top: 0.5rem;
  width: 170px;
  height: 48px;
  border-radius: 10px;
}

.skeleton-avatar {
  width: min(380px, 70vw);
  aspect-ratio: 1;
  border-radius: 50%;
  justify-self: center;
}

.skeleton-footer {
  margin-top: auto;
  padding: 24px 6%;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.skeleton-footer-time {
  width: 190px;
  height: 14px;
  border-radius: 999px;
}

.skeleton-social {
  display: flex;
  gap: 1.25rem;
}

.skeleton-social-dot {
  width: 22px;
  height: 22px;
  border-radius: 50%;
}

@keyframes skeleton-shimmer {
  to {
    transform: translateX(100%);
  }
}

.skip-link {
  position: absolute;
  top: -48px;
  left: 16px;
  padding: 12px 20px;
  background: var(--btn-bg);
  color: white;
  text-decoration: none;
  font-size: 0.875rem;
  z-index: 1000;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

.music-cursor {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  pointer-events: none;
  color: var(--accent);
  opacity: 0;
  transform: translate3d(-50%, -50%, 0) scale(0.62);
  transition: opacity 90ms ease-out, transform 130ms cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform, opacity;
}

.music-cursor i {
  font-size: 1.06rem;
  filter: drop-shadow(0 1px 4px rgba(79, 70, 229, 0.25));
}

.music-cursor.visible {
  opacity: 1;
  transform: translate3d(-50%, -50%, 0) scale(1);
}

.music-hover-target,
.music-hover-target * {
  cursor: none !important;
}

.note-particle {
  position: fixed;
  pointer-events: none;
  z-index: 999;
  color: var(--accent);
  font-size: 1rem;
  animation: note-float 850ms ease-out forwards;
}

@keyframes note-float {
  to {
    transform: translate(var(--x), var(--y)) rotate(var(--r)) scale(0.85);
    opacity: 0;
  }
}

.main-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  width: 100%;
  padding-top: var(--header-height);
}

/* === Header === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 100;
  background: rgba(250, 250, 249, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

[data-theme="dark"] .header {
  background: rgba(12, 10, 9, 0.92);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 6%;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.nav-brand {
  text-decoration: none;
  color: var(--text);
}

.nav-greeting {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: inline-block;
}

.nav-brand:hover .nav-greeting {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}

.nav-overlay {
  display: none;
}

.nav-icon-close {
  display: none;
}

.nav-toggle.active .nav-icon-menu {
  display: none;
}

.nav-toggle.active .nav-icon-close {
  display: block;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

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

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

.theme-icon-sun {
  display: none;
}

[data-theme="dark"] .theme-icon-moon {
  display: none;
}

[data-theme="dark"] .theme-icon-sun {
  display: inline-block;
}

/* === Hero === */
.main {
  flex: 1;
}

.hero {
  padding: 6% 6% 10%;
  min-height: calc(100vh - 76px);
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 5rem;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.hero-title {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(2.8rem, 8vw, 6.5rem);
  line-height: 1;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
  color: var(--text);
}

.hero-desc {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 420px;
  margin-bottom: 2rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 14px 28px;
  font-family: 'Syne', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: white;
  background: var(--btn-bg);
  border: none;
  border-radius: 10px;
  transition: background 0.2s ease, transform 0.2s ease;
}

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

.btn-primary i {
  font-size: 1.1em;
  transition: transform 0.2s ease;
}

.btn-primary:hover i {
  transform: translate(2px, -2px);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image-wrap {
  position: relative;
  width: min(380px, 90%);
}

.hero-image-frame {
  position: relative;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: var(--shadow);
  cursor: pointer;
}

.hero-image-frame::before {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  padding: 3px;
  background: linear-gradient(135deg, var(--btn-bg), var(--accent-hover));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  z-index: 1;
  opacity: 0.6;
}

.hero-image-frame img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
  will-change: transform;
}

/* === Focus Section === */
.focus {
  padding: 8% 6% 12%;
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
}

[data-theme="dark"] .focus {
  background: rgba(28, 25, 23, 0.5);
}

.focus-heading {
  font-size: 0.7rem;
  letter-spacing: 0.4em;
  text-align: center;
  color: var(--text-muted);
  opacity: 0.35;
  margin-bottom: 1.5rem;
}

.focus-hint {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  opacity: 0.25;
  margin-bottom: 2.5rem;
  transition: opacity 0.4s ease;
}

.focus:hover .focus-hint {
  opacity: 0.45;
}

.focus-visual {
  max-width: 520px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: flex-end;
  height: 100px;
  cursor: default;
  outline: none;
}

.pulse-bars {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 12px;
  height: 100%;
}

.pulse-bars .bar {
  width: 14px;
  background: var(--creative-bar);
  border-radius: 7px;
  height: 20%;
  transform-origin: bottom;
  transition: transform 0.25s ease;
}

.pulse-bars .bar:nth-child(1) {
  height: 35%;
}

.pulse-bars .bar:nth-child(2) {
  height: 60%;
}

.pulse-bars .bar:nth-child(3) {
  height: 45%;
}

.pulse-bars .bar:nth-child(4) {
  height: 80%;
}

.pulse-bars .bar:nth-child(5) {
  height: 55%;
}

.pulse-bars .bar:nth-child(6) {
  height: 70%;
}

.pulse-bars .bar:nth-child(7) {
  height: 40%;
}

.pulse-bars .bar:nth-child(8) {
  height: 65%;
}

.pulse-bars .bar:nth-child(9) {
  height: 50%;
}

.pulse-bars .bar:nth-child(10) {
  height: 30%;
}

.focus-visual:hover .bar:nth-child(1),
.focus-visual:focus .bar:nth-child(1) {
  height: 50%;
}

.focus-visual:hover .bar:nth-child(2),
.focus-visual:focus .bar:nth-child(2) {
  height: 75%;
}

.focus-visual:hover .bar:nth-child(3),
.focus-visual:focus .bar:nth-child(3) {
  height: 60%;
}

.focus-visual:hover .bar:nth-child(4),
.focus-visual:focus .bar:nth-child(4) {
  height: 95%;
}

.focus-visual:hover .bar:nth-child(5),
.focus-visual:focus .bar:nth-child(5) {
  height: 70%;
}

.focus-visual:hover .bar:nth-child(6),
.focus-visual:focus .bar:nth-child(6) {
  height: 85%;
}

.focus-visual:hover .bar:nth-child(7),
.focus-visual:focus .bar:nth-child(7) {
  height: 55%;
}

.focus-visual:hover .bar:nth-child(8),
.focus-visual:focus .bar:nth-child(8) {
  height: 80%;
}

.focus-visual:hover .bar:nth-child(9),
.focus-visual:focus .bar:nth-child(9) {
  height: 65%;
}

.focus-visual:hover .bar:nth-child(10),
.focus-visual:focus .bar:nth-child(10) {
  height: 45%;
}

/* === Footer === */
.footer {
  padding: 24px 6%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-social {
  display: flex;
  gap: 2rem;
}

.footer-social a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 1.4rem;
  transition: color 0.2s ease, transform 0.2s ease;
  display: inline-flex;
}

.footer-social a:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

/* === Back to top === */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--btn-bg);
  color: white;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
  z-index: 99;
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-4px);
}

/* === Focus & accessibility === */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

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

  .skeleton-chip::after,
  .skeleton-line::after,
  .skeleton-button::after,
  .skeleton-avatar::after,
  .skeleton-circle::after,
  .skeleton-social-dot::after {
    animation: none;
  }
}

/* GSAP animates from opacity:0, y:24 - no initial hide needed */

/* === Mobile === */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
    position: relative;
    z-index: 101;
  }

  .nav-overlay.visible {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 98;
    backdrop-filter: blur(4px);
  }

  .nav-right {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(280px, 85vw);
    height: 100vh;
    background: var(--bg);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    padding: 2rem;
    z-index: 99;
    border-left: 1px solid var(--border);
    transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .theme-toggle {
    order: 2;
  }

  .nav-link {
    order: 1;
  }

  .nav-right .nav-link {
    font-size: 1.5rem;
    font-weight: 600;
  }

  .nav-right.open {
    right: 0;
  }

  .nav-right .theme-toggle {
    align-self: flex-start;
  }

  .nav-right .nav-link {
    font-size: 1.1rem;
  }
}

@media (max-width: 900px) {
  .skeleton-hero {
    grid-template-columns: 1fr;
    gap: 2.2rem;
    padding-top: 3rem;
    padding-bottom: 3rem;
  }

  .skeleton-copy {
    order: 2;
  }

  .skeleton-avatar {
    order: 1;
  }

  .hero {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 4rem;
    text-align: center;
    justify-items: center;
  }

  .hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-visual {
    order: -1;
  }

  .creative,
  .focus {
    padding: 6% 5% 10%;
  }
}

@media (max-width: 768px) {
  .skeleton-top {
    padding: 16px 5%;
  }

  .skeleton-footer {
    padding: 20px 5%;
  }

  .nav {
    padding: 16px 5%;
  }

  .hero {
    padding: 5% 5% 8%;
    min-height: auto;
  }

  .hero-title {
    font-size: clamp(2.5rem, 10vw, 4rem);
  }

  .footer {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
    padding: 32px 5%;
  }

  .footer-social {
    gap: 1.5rem;
  }
}

@media (max-width: 480px) {
  .skeleton-chip {
    width: 120px;
    height: 14px;
  }

  .skeleton-chip-small {
    width: 70px;
  }

  .skeleton-title {
    border-radius: 12px;
  }

  .skeleton-button {
    width: 145px;
    height: 44px;
  }

  .skeleton-footer {
    flex-direction: column;
    gap: 0.9rem;
    align-items: flex-start;
  }

  .skeleton-footer-time {
    width: 150px;
  }

  .hero {
    padding-top: 2rem;
  }

  .hero-image-wrap {
    width: 65vw;
  }

  .hero-grid {
    gap: 1.5rem;
  }

  .hero-title {
    font-size: clamp(2.2rem, 12vw, 3.2rem);
  }

  .hero-desc {
    font-size: 1rem;
    line-height: 1.6;
  }

  .focus {
    padding: 5% 4% 8%;
  }

  .focus-heading {
    margin-bottom: 0.5rem;
  }

  .focus-hint {
    margin-bottom: 1.5rem;
  }

  .pulse-bars .bar {
    width: 10px;
    border-radius: 5px;
  }

  .pulse-bars {
    gap: 8px;
  }

  .focus-visual {
    height: 80px;
  }

  .back-to-top {
    bottom: 16px;
    right: 16px;
    width: 44px;
    height: 44px;
  }
}

@media (hover: none) and (pointer: coarse) {
  .btn-primary {
    padding: 16px 32px;
  }
}

@media print {

  .skip-link,
  .back-to-top,
  .theme-toggle,
  .nav-toggle,
  .nav-link {
    display: none !important;
  }

  .nav-right {
    position: static !important;
    width: auto !important;
    height: auto !important;
    flex-direction: row !important;
  }

  body {
    background: white;
    color: #111;
  }

  .hero {
    min-height: auto;
  }
}