:root {
  --color-background: #050505;
  --color-surface: #0b0b0b;

  --color-text: #ffffff;
  --color-text-muted: rgba(255, 255, 255, 0.5);

  --color-accent: #f4b400;
  --color-accent-light: #ffd45c;
  --color-accent-soft: rgba(244, 180, 0, 0.3);

  --font-main: Arial, Helvetica, sans-serif;
  --content-width: 1100px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

::selection {
  background: var(--color-accent);
  color: var(--color-background);
}

/* HEADER */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;

  display: flex;
  align-items: center;
  justify-content: space-between;

  width: 100%;
  padding: 20px 5%;

  background: rgba(5, 5, 5, 0.9);
  border-bottom: 1px solid var(--color-accent-soft);
}

.site-logo {
  color: var(--color-text);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 1px;
  text-decoration: none;
  transition: color 0.3s ease;
}

.site-navigation {
  display: flex;
  gap: 32px;
}

.site-navigation a {
  color: var(--color-text);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: color 0.3s ease;
}

.site-navigation a:hover,
.site-logo:hover {
  color: var(--color-accent);
}

/* MOBILE MENU */

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 9px;
  background: transparent;
  border: 1px solid var(--color-accent-soft);
  cursor: pointer;
}

.menu-button span {
  display: block;
  width: 100%;
  height: 2px;
  margin: 5px 0;
  background: var(--color-accent);

  transition:
    transform 0.3s ease,
    opacity 0.3s ease;
}

/* HERO */

.hero {
  position: relative;

  display: flex;
  align-items: center;
  justify-content: center;

  min-height: 100vh;
  padding: 120px 20px 80px;

  background-image: url("../assets/images/hero-background.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
}

.hero-content {
  position: relative;
  z-index: 1;

  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;

  width: 100%;
  max-width: 1000px;

  text-align: center;
}

.hero-logo {
  display: block;
  width: min(900px, 90%);
  height: auto;

  transition:
    transform 0.4s ease,
    filter 0.4s ease;
}

.hero-logo:hover {
  transform: scale(1.02);
  filter: drop-shadow(0 0 18px rgba(244, 180, 0, 0.25));
}

.listen-button {
  display: inline-block;
  padding: 18px 70px;

  background: rgba(0, 0, 0, 0.45);
  border: 2px solid var(--color-accent);

  color: var(--color-accent);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 3px;
  text-decoration: none;
  text-transform: uppercase;

  transition:
    background 0.3s ease,
    color 0.3s ease,
    transform 0.3s ease,
    box-shadow 0.3s ease;
}

.listen-button:hover {
  background: var(--color-accent);
  color: var(--color-background);
  transform: translateY(-3px);
  box-shadow: 0 0 30px rgba(244, 180, 0, 0.45);
}

/* COMMON */

.music-section,
.about-section,
.contact-section {
  background: linear-gradient(
    180deg,
    var(--color-background) 0%,
    var(--color-surface) 50%,
    var(--color-background) 100%
  );
}

.section-title {
  position: relative;
  margin: 0 0 60px;

  color: var(--color-accent);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 6px;
  text-align: center;
  text-transform: uppercase;
}

.section-title::after {
  content: "";
  display: block;

  width: 42px;
  height: 1px;
  margin: 18px auto 0;

  background: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent-soft);
}

/* MUSIC */

.music-section {
  min-height: 100vh;
  padding: 120px 5%;
}

.music-container {
  width: 100%;
  max-width: var(--content-width);
  margin: 0 auto;
}

.track-list {
  border-top: 1px solid rgba(244, 180, 0, 0.45);
}

.track {
  border-bottom: 1px solid rgba(244, 180, 0, 0.45);

  transition:
    background 0.3s ease,
    border-color 0.3s ease;
}

.track:hover,
.track.is-open {
  background: rgba(244, 180, 0, 0.04);
  border-bottom-color: rgba(244, 180, 0, 0.7);
}

.track-main {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr) 110px;
  align-items: center;
  gap: 20px;

  min-height: 110px;
  padding: 20px 10px;
}

.track-number {
  justify-self: start;

  color: rgba(244, 180, 0, 0.55);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 3px;
}

.track-title {
  justify-self: center;
  margin: 0;

  color: var(--color-text);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: 3px;
  text-align: center;

  transition: color 0.3s ease;
}

.track:hover .track-title,
.track.is-open .track-title {
  color: var(--color-accent-light);
}

.track-play-button {
  justify-self: end;

  min-width: 110px;
  padding: 12px 20px;

  background: transparent;
  border: 1px solid var(--color-accent);

  color: var(--color-accent);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;

  cursor: pointer;

  transition:
    background 0.3s ease,
    color 0.3s ease,
    transform 0.3s ease,
    box-shadow 0.3s ease;
}

.track-play-button:hover {
  background: var(--color-accent);
  color: var(--color-background);
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(244, 180, 0, 0.35);
}

.track-player {
  max-height: 0;
  padding: 0 10px;

  overflow: hidden;
  opacity: 0;

  transition:
    max-height 0.4s ease,
    padding 0.4s ease,
    opacity 0.3s ease;
}

.track.is-open .track-player {
  max-height: 140px;
  padding: 0 10px 24px;
  opacity: 1;
}

.track-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px;
}

.track-controls audio {
  display: block;
  width: 100%;
  height: 45px;
  accent-color: var(--color-accent);
}

.track-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  min-height: 45px;
  padding: 10px 20px;

  border: 1px solid var(--color-accent);
  background: transparent;

  color: var(--color-accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;

  transition:
    background 0.3s ease,
    color 0.3s ease,
    box-shadow 0.3s ease;
}

.track-download:hover {
  background: var(--color-accent);
  color: var(--color-background);
  box-shadow: 0 0 20px rgba(244, 180, 0, 0.3);
}

/* ABOUT */

.about-section {
  display: flex;
  align-items: center;
  justify-content: center;

  min-height: 100vh;
  padding: 100px 20px;
}

.about-container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-text {
  margin: 0;
  color: var(--color-text);
  font-size: 24px;
  font-weight: 300;
  line-height: 1.8;
  letter-spacing: 1px;
}

/* CONTACT */

.contact-section {
  display: flex;
  align-items: center;
  justify-content: center;

  min-height: 100vh;
  padding: 100px 20px;
}

.contact-container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.contact-email {
  display: inline-block;
  color: var(--color-text);
  font-size: 24px;
  font-weight: 300;
  letter-spacing: 2px;
  text-decoration: none;

  transition:
    color 0.3s ease,
    text-shadow 0.3s ease;
}

.contact-email:hover {
  color: var(--color-accent);
  text-shadow: 0 0 18px rgba(244, 180, 0, 0.55);
}

#music,
#about,
#contact {
  scroll-margin-top: 85px;
}

/* FOOTER */

.site-footer {
  display: flex;
  align-items: center;
  justify-content: center;

  min-height: 110px;
  padding: 30px 20px;

  background: var(--color-background);
  border-top: 1px solid var(--color-accent-soft);
}

.site-footer p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 2px;
  text-align: center;
}

/* MOBILE */

@media (max-width: 768px) {
  .site-header {
    padding: 16px 20px;
  }

  .site-logo {
    font-size: 18px;
  }
  .menu-button {
    position: relative;
    z-index: 102;
    display: block;
  }

  .menu-button.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .menu-button.is-open span:nth-child(2) {
    opacity: 0;
  }

  .menu-button.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .site-navigation {
    position: absolute;
    top: 100%;
    left: 0;

    display: flex;
    flex-direction: column;
    gap: 0;

    width: 100%;

    background: rgba(5, 5, 5, 0.98);
    border-bottom: 1px solid var(--color-accent-soft);

    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);

    transition:
      opacity 0.3s ease,
      visibility 0.3s ease,
      transform 0.3s ease;
  }

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

  .site-navigation a {
    display: block;
    width: 100%;
    padding: 20px;

    border-top: 1px solid rgba(244, 180, 0, 0.15);

    font-size: 13px;
    letter-spacing: 2px;
    text-align: center;
  }

  .hero {
    min-height: 100svh;
    padding: 100px 20px 60px;
  }

  .hero-content {
    gap: 30px;
  }

  .hero-logo {
    width: min(700px, 96%);
  }

  .listen-button {
    padding: 15px 48px;
    font-size: 18px;
    letter-spacing: 2px;
  }

  .music-section {
    min-height: auto;
    padding: 100px 20px;
  }

  .section-title {
    margin-bottom: 45px;
    font-size: 16px;
    letter-spacing: 5px;
  }

  .track-main {
    grid-template-columns: 44px minmax(0, 1fr) 92px;
    gap: 10px;

    min-height: 105px;
    padding: 18px 4px;
  }

  .track-number {
    font-size: 12px;
    letter-spacing: 1px;
  }

  .track-title {
    font-size: 14px;
    letter-spacing: 0.8px;
    text-align: center;
  }

  .track-play-button {
    min-width: 92px;
    padding: 10px 12px;
    font-size: 11px;
  }

  .track.is-open .track-player {
    max-height: 210px;
    padding: 0 4px 22px;
  }

  .track-controls {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .track-download {
    width: 100%;
  }

  .about-section,
  .contact-section {
    min-height: 100svh;
    padding: 90px 20px;
  }

  .about-text,
  .contact-email {
    font-size: 20px;
  }

  .about-text {
    line-height: 1.7;
  }

  .contact-email {
    letter-spacing: 1px;
  }

  .site-footer {
    min-height: 90px;
    padding: 25px 20px;
  }

  .site-footer p {
    font-size: 11px;
    letter-spacing: 1.5px;
  }

  #music,
  #about,
  #contact {
    scroll-margin-top: 75px;
  }
}