:root{
  --bg: #0b0b0f;
  --panel: #121216;
  --panel-2: #16161c;
  --text: #e9e9ee;
  --muted: #a3a3ad;
  --muted-2: #7b7b86;
  --line: rgba(255,255,255,.08);
  --accent: #1db954;     /* vibe spotify */
  --accent-2: #8a2be2;   /* toque Benson morado */
  --shadow: 0 18px 60px rgba(0,0,0,.55);
  --r: 16px;
  --r2: 22px;
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color: var(--text);
  background:
    radial-gradient(900px 600px at 25% 10%, rgba(138,43,226,.18), transparent 60%),
    radial-gradient(900px 600px at 80% 0%, rgba(29,185,84,.14), transparent 55%),
    linear-gradient(180deg, #07070a, #0b0b0f 45%, #07070a);
}

/* Layout */
.app{
  height:100%;
  display:grid;
  grid-template-columns: 280px 1fr;
  grid-template-rows: 1fr;
}

.sidebar{
  padding: 18px;
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18,18,22,.9), rgba(10,10,14,.85));
  position: sticky;
  top: 0;
  height: 100vh;
}

.main{
  min-width:0;
  padding: 18px 18px 120px; /* espacio para el player inferior */
  overflow: auto;
}

/* Brand */
.brand{
  display:flex;
  align-items:center;
  gap: 12px;
  padding: 10px 10px 14px;
  border-radius: var(--r);
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.06);
  box-shadow: 0 10px 30px rgba(0,0,0,.25);
}

.logo{
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display:grid;
  place-items:center;
  font-weight: 900;
  letter-spacing: .5px;
  background:
    radial-gradient(18px 18px at 30% 30%, rgba(255,255,255,.25), transparent 60%),
    linear-gradient(135deg, var(--accent), var(--accent-2));
}

.brand-text{ display:flex; flex-direction:column; line-height:1.1; }
.brand-name{ font-weight: 800; }
.brand-sub{ color: var(--muted); font-size: 12px; margin-top: 2px; }

/* Nav */
.nav{
  margin-top: 16px;
  display:flex;
  flex-direction:column;
  gap: 6px;
}

.nav-item{
  display:flex;
  align-items:center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  text-decoration:none;
  color: var(--text);
  background: rgba(255,255,255,.02);
  border: 1px solid transparent;
  transition: .2s ease;
}
.nav-item:hover{
  background: rgba(255,255,255,.04);
  border-color: rgba(255,255,255,.07);
}
.nav-item.active{
  background: linear-gradient(135deg, rgba(29,185,84,.18), rgba(138,43,226,.14));
  border-color: rgba(255,255,255,.10);
}
.nav-ico{ width: 20px; text-align:center; }

/* Sidebar box */
.sidebar-box{
  margin-top: 16px;
  padding: 14px;
  border-radius: var(--r);
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.06);
}
.box-title{ font-weight: 800; margin-bottom: 6px; }
.box-desc{ color: var(--muted); font-size: 13px; line-height: 1.35; }

.chips{ display:flex; flex-wrap:wrap; gap: 8px; margin-top: 12px; }
.chip{
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.09);
  background: rgba(255,255,255,.02);
  color: var(--muted);
}

.sidebar-footer{
  position:absolute;
  left: 18px;
  right: 18px;
  bottom: 14px;
  color: var(--muted-2);
}

/* Topbar */
.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.search{
  flex:1;
  display:flex;
  align-items:center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  box-shadow: 0 12px 40px rgba(0,0,0,.25);
}
.search-ico{ opacity:.9; }
.search input{
  border:0;
  outline:0;
  background: transparent;
  color: var(--text);
  width: 100%;
  font-size: 14px;
}
.search input::placeholder{ color: rgba(233,233,238,.55); }

.actions{ display:flex; align-items:center; gap: 10px; }

/* Buttons */
.btn{
  border:0;
  cursor:pointer;
  color:#08110c;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), #3ee88b);
  padding: 11px 14px;
  border-radius: 999px;
  box-shadow: 0 16px 50px rgba(29,185,84,.22);
  transition: transform .15s ease, filter .15s ease;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  gap: 8px;
}
.btn:hover{ transform: translateY(-1px); filter: brightness(1.05); }
.btn:active{ transform: translateY(0); }

.btn.ghost{
  color: var(--text);
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.10);
  box-shadow: none;
}
#shuffleBtn.on{
  background: linear-gradient(135deg, rgba(138,43,226,.35), rgba(29,185,84,.20));
  border-color: rgba(255,255,255,.14);
}

/* Hero */
.hero{
  display:grid;
  grid-template-columns: 1.35fr .65fr;
  gap: 16px;
  padding: 18px;
  border-radius: var(--r2);
  background:
    radial-gradient(700px 380px at 20% 30%, rgba(29,185,84,.18), transparent 60%),
    radial-gradient(700px 380px at 90% 10%, rgba(138,43,226,.18), transparent 55%),
    rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.08);
  box-shadow: var(--shadow);
}

.pill{
  display:inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: .3px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  color: var(--muted);
  margin-bottom: 10px;
}

.hero h1{
  margin: 0 0 8px;
  font-size: clamp(26px, 3vw, 42px);
  letter-spacing: -0.8px;
}
.hero p{
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
  max-width: 58ch;
}

.hero-cta{ margin-top: 14px; display:flex; gap: 10px; flex-wrap:wrap; }

.hero-right{
  display:grid;
  gap: 10px;
  align-content:start;
}
.stat{
  padding: 14px;
  border-radius: 18px;
  background: rgba(10,10,14,.35);
  border: 1px solid rgba(255,255,255,.08);
}
.stat-num{ font-size: 22px; font-weight: 900; }
.stat-label{ color: var(--muted); font-size: 12px; margin-top: 2px; }

/* Cards */
.grid{ margin-top: 18px; }
.section-title{
  margin: 0 0 10px;
  font-size: 16px;
  color: rgba(233,233,238,.92);
  letter-spacing: .2px;
}

.cards{
  display:grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.card{
  position: relative;
  padding: 14px;
  border-radius: var(--r2);
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.08);
  overflow:hidden;
  transition: transform .15s ease, background .15s ease;
}
.card:hover{ transform: translateY(-2px); background: rgba(255,255,255,.045); }
.card-art{
  height: 120px;
  border-radius: 18px;
  background:
    radial-gradient(90px 70px at 30% 30%, rgba(255,255,255,.18), transparent 60%),
    linear-gradient(135deg, rgba(29,185,84,.55), rgba(138,43,226,.55));
  border: 1px solid rgba(255,255,255,.10);
}
.art-1{ background: linear-gradient(135deg, rgba(29,185,84,.55), rgba(0,200,255,.35)); }
.art-2{ background: linear-gradient(135deg, rgba(138,43,226,.6), rgba(255,0,140,.22)); }
.art-3{ background: linear-gradient(135deg, rgba(255,170,0,.35), rgba(29,185,84,.55)); }
.art-4{ background: linear-gradient(135deg, rgba(0,200,255,.35), rgba(138,43,226,.55)); }

.card-title{ font-weight: 900; margin-top: 10px; }
.card-sub{ color: var(--muted); font-size: 13px; margin-top: 3px; }

.card-play{
  position:absolute;
  right: 14px;
  bottom: 14px;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 0;
  cursor:pointer;
  background: linear-gradient(135deg, var(--accent), #3ee88b);
  font-weight: 900;
  color:#07110c;
  box-shadow: 0 16px 50px rgba(29,185,84,.22);
  transform: translateY(8px);
  opacity: 0;
  transition: .18s ease;
}
.card:hover .card-play{
  transform: translateY(0);
  opacity: 1;
}

/* Songs table */
.songs{ margin-top: 18px; }
.songs-head{
  display:flex;
  align-items:end;
  justify-content:space-between;
  gap: 10px;
}
.hint{ color: var(--muted); font-size: 13px; }

.table{
  margin-top: 10px;
  border-radius: var(--r2);
  overflow:hidden;
  border: 1px solid rgba(255,255,255,.08);
  background: rgba(255,255,255,.02);
}

.row{
  display:grid;
  grid-template-columns: 40px 1.6fr .9fr .9fr 90px 70px;
  align-items:center;
  gap: 10px;
  padding: 12px 14px;
  border-top: 1px solid rgba(255,255,255,.06);
}
.row.header{
  border-top: 0;
  background: rgba(255,255,255,.03);
  color: rgba(233,233,238,.85);
  font-size: 12px;
  letter-spacing: .25px;
  text-transform: uppercase;
}
.row.song:hover{ background: rgba(255,255,255,.035); }
.row.song.playing{
  background: linear-gradient(135deg, rgba(29,185,84,.12), rgba(138,43,226,.10));
}

.col{ min-width:0; }
.col.time{ text-align:right; color: var(--muted); }
.col.act{ display:flex; justify-content:flex-end; }

.title-wrap{
  display:flex;
  align-items:center;
  gap: 10px;
}
.cover{
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.10);
  background: linear-gradient(135deg, rgba(29,185,84,.6), rgba(138,43,226,.55));
}
.c1{ background: linear-gradient(135deg, rgba(29,185,84,.6), rgba(0,200,255,.35)); }
.c2{ background: linear-gradient(135deg, rgba(138,43,226,.6), rgba(255,0,140,.22)); }
.c3{ background: linear-gradient(135deg, rgba(255,170,0,.35), rgba(29,185,84,.55)); }
.c4{ background: linear-gradient(135deg, rgba(0,200,255,.35), rgba(138,43,226,.55)); }

.t .name{ font-weight: 900; }
.t .sub{ color: var(--muted); font-size: 12px; margin-top: 2px; }

.mini{
  width: 38px;
  height: 34px;
  border-radius: 12px;
  cursor:pointer;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04);
  color: var(--text);
  transition: .15s ease;
}
.mini:hover{ background: rgba(255,255,255,.07); transform: translateY(-1px); }

.row.song.hidden{ display:none; }

/* How section */
.how{
  margin-top: 18px;
  padding: 16px 18px;
  border-radius: var(--r2);
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.08);
}
.steps{
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.6;
}
code{
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.08);
  padding: 2px 6px;
  border-radius: 8px;
  color: rgba(233,233,238,.95);
}

/* Footer */
.footer{ margin-top: 16px; }
.footer-inner{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
  color: var(--muted);
}
.dot{ opacity:.5; }
.muted{ color: var(--muted-2); }

/* Player */
.player{
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: 92px;
  display:grid;
  grid-template-columns: 320px 1fr 240px;
  align-items:center;
  gap: 14px;
  padding: 12px 16px;
  border-top: 1px solid rgba(255,255,255,.10);
  background: rgba(10,10,14,.75);
  backdrop-filter: blur(14px);
}

.now{
  display:flex;
  align-items:center;
  gap: 12px;
  min-width:0;
}
.now-cover{
  width: 54px;
  height: 54px;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,.10);
  background: linear-gradient(135deg, rgba(29,185,84,.6), rgba(138,43,226,.55));
}
.now-meta{ min-width:0; }
.now-title{
  font-weight: 900;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.now-artist{
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.controls{
  display:flex;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap: 8px;
}

.ctl{
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04);
  color: var(--text);
  cursor:pointer;
  width: 38px;
  height: 34px;
  border-radius: 12px;
  transition: .15s ease;
}
.ctl:hover{ background: rgba(255,255,255,.07); transform: translateY(-1px); }
.ctl.big{
  width: 56px;
  height: 40px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(29,185,84,.85), rgba(62,232,139,.85));
  color:#07110c;
  border: 0;
  box-shadow: 0 16px 50px rgba(29,185,84,.18);
  font-weight: 900;
}

.bar{
  width: min(720px, 100%);
  display:flex;
  align-items:center;
  gap: 10px;
}
.time{ font-size: 12px; color: var(--muted); width: 42px; text-align:center; }
#seek{
  -webkit-appearance:none;
  appearance:none;
  width: 100%;
  height: 6px;
  border-radius: 999px;
  background: rgba(255,255,255,.10);
  outline: none;
}
#seek::-webkit-slider-thumb{
  -webkit-appearance:none;
  appearance:none;
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: var(--accent);
  border: 2px solid rgba(0,0,0,.35);
}

.volume{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap: 10px;
}
#vol{
  -webkit-appearance:none;
  appearance:none;
  width: 140px;
  height: 6px;
  border-radius: 999px;
  background: rgba(255,255,255,.10);
  outline:none;
}
#vol::-webkit-slider-thumb{
  -webkit-appearance:none;
  appearance:none;
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: var(--accent-2);
  border: 2px solid rgba(0,0,0,.35);
}

/* Responsive */
@media (max-width: 1100px){
  .cards{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .player{ grid-template-columns: 260px 1fr 200px; }
}
@media (max-width: 860px){
  .app{ grid-template-columns: 1fr; }
  .sidebar{
    position: relative;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .sidebar-footer{ position: static; margin-top: 12px; }
  .hero{ grid-template-columns: 1fr; }
  .row{ grid-template-columns: 34px 1.6fr .8fr 0fr 80px 60px; }
  .col.album{ display:none; }
  .player{ grid-template-columns: 1fr; height: auto; padding-bottom: 14px; }
  .volume{ justify-content:center; }
}
@media (max-width: 520px){
  .row{ grid-template-columns: 28px 1.5fr 0fr 0fr 70px 56px; }
  .col.artist{ display:none; }
}