/* ============================================================
   Stylesheet
   ============================================================ */

/* ─── CUSTOM FONTS ───────────────────────────────────────── */
@font-face {
  font-family: 'RadlushExtraBold';
  src: url('../fonts/RadlushExtraBold.ttf') format('truetype');
  font-weight: 800;
  font-style: normal;
  font-display: swap;
  letter-spacing: 0.03em
}

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

:root {
  --bg:   #06060e;
  --text: #f2f2fa;
  --dim:  rgba(242,242,250,0.45);
  --font-heading: 'RadlushExtraBold', sans-serif;
  --font-body:    'RadlushMedium',    sans-serif;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  overflow: hidden;
}

/* ─── LOGIN ──────────────────────────────────────────────── */
#login-screen {
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  text-align: center;
  padding: 2rem;
}

#login-screen > div:first-child {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  width: min(45vw, 600px);
}

.login-title {
  font-family: var(--font-heading);
  font-size: clamp(3.2rem, 15vw, 10.5rem);
  letter-spacing: 0.04em;
  line-height: 1;

  background: linear-gradient(
    270deg,
    #a78bfa,
    #818cf8,
    #60a5fa,
    #818cf8,
    #a78bfa
  );
  background-size: 300% 300%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: gradientShift 6s ease infinite;
}

@keyframes gradientShift {
  0%   { background-position: 0%   50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0%   50%; }
}

.lastfm-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: #ab99fa;
  color: white;
  border: none;
  padding: 1.05rem 2.6rem;
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.18s, box-shadow 0.18s;
  letter-spacing: 0.02em;
  margin-top: 0.8em
}

.lastfm-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 36px rgba(148, 17, 255, 0.5);
}
.lastfm-btn img, .lastfm-btn svg {
  width: 29px;
  height: 17px;
  flex-shrink: 0;
}

/* ─── VISUALIZER SHELL ───────────────────────────────────── */
#visualizer-screen {
  display: none;
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

#bg-glow {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  transition: background 2.5s ease;
}
#bg-glow::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  background-size: 150px 150px;
}

#wave-canvas {
  position: absolute;
  bottom: 88px;
  left: 0;
  width: 100%;
  height: calc(100vh - 88px);
  z-index: 5;
  pointer-events: none;
  display: block;
}

/* ─── ALBUM + TRACK INFO ─────────────────────────────────── */
#album-section {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -58%);
  z-index: 15;
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  opacity: 0;
  transition: opacity 0.7s ease;
}
#album-section.visible { opacity: 1; }

#album-art {
  width: clamp(150px, 20vw, 220px);
  height: clamp(150px, 20vw, 220px);
  border-radius: 12px;
  object-fit: cover;
  display: block;
  box-shadow: 0 28px 72px rgba(0,0,0,0.88);
  transition: box-shadow 2s ease;
}

#track-info { text-align: center; }

#track-name {
  font-family: var(--font-heading);
  font-size: clamp(1.1rem, 2.5vw, 1.6rem);
  letter-spacing: -0.02em;
  max-width: 520px;
  white-space: normal;
  overflow: visible;
  word-break: break-word;
  line-height: 1.25;
}
#artist-name {
  font-family: var(--font-body);
  color: var(--dim);
  font-size: 0.88rem;
  margin-top: 0.25rem;
}

/* ─── IDLE STATE ─────────────────────────────────────────── */
#idle-state {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -60%);
  text-align: center;
  z-index: 15;
}
.idle-bars {
  display: flex;
  gap: 5px;
  justify-content: center;
  align-items: flex-end;
  height: 52px;
  margin-bottom: 1.2rem;
}
.idle-bar {
  width: 4px;
  border-radius: 100px;
  background: rgba(255,255,255,0.2);
  animation: idleAnim 1.4s ease-in-out infinite;
}
.idle-bar:nth-child(1) { height: 22px; animation-delay: 0.0s; }
.idle-bar:nth-child(2) { height: 36px; animation-delay: 0.15s; }
.idle-bar:nth-child(3) { height: 52px; animation-delay: 0.3s; }
.idle-bar:nth-child(4) { height: 36px; animation-delay: 0.45s; }
.idle-bar:nth-child(5) { height: 22px; animation-delay: 0.6s; }

@keyframes idleAnim {
  0%, 100% { opacity: 0.2; transform: scaleY(0.5); }
  50%       { opacity: 0.55; transform: scaleY(1); }
}
.idle-label {
  font-family: var(--font-body);
  color: var(--dim);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ─── AUDIO CAPTURE OVERLAY ──────────────────────────────── */
#audio-prompt {
  position: absolute;
  inset: 0;
  z-index: 50;
  background: rgba(6,6,14,0.92);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.4rem;
  text-align: center;
  padding: 2rem;
  backdrop-filter: blur(12px);
}
#audio-prompt.hidden { display: none; }

.audio-prompt-icon  { font-size: 2.8rem; line-height: 1; }

.audio-prompt-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

.audio-prompt-sub {
  font-family: var(--font-body);
  color: var(--dim);
  font-size: 0.88rem;
  max-width: 380px;
  line-height: 1.7;
}

.audio-btn-row {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  justify-content: center;
}
.audio-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: none;
  padding: 0.8rem 1.6rem;
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 0.88rem;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}
.audio-btn:hover { transform: scale(1.04); }
.audio-btn-primary { background: var(--text); color: var(--bg); }
.audio-btn-primary:hover { box-shadow: 0 0 28px rgba(242,242,250,0.3); }

/* ─── WHY TOOLTIP ────────────────────────────────────────── */
.why-row {
  position: relative;
  display: flex;
  justify-content: center;
  margin-top: 0.6rem;
}
.why-link {
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--dim);
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
  transition: color 0.18s;
}
.why-link:hover { color: var(--text); }
.why-tooltip {
  display: none;
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  width: 300px;
  background: rgba(18,18,28,0.97);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--dim);
  line-height: 1.65;
  text-align: left;
  pointer-events: none;
  z-index: 100;
  box-shadow: 0 8px 32px rgba(0,0,0,0.6);
}
.why-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: rgba(18,18,28,0.97);
}
.why-row:hover .why-tooltip,
.why-link:focus .why-tooltip { display: block; }

/* ─── PROGRESS BAR ───────────────────────────────────────── */
#progress-section {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 20;
  padding: 0 3rem 2rem;
}
#time-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.55rem;
  font-family: var(--font-body);
  font-size: 0.68rem;
  color: var(--dim);
  letter-spacing: 0.04em;
}

#fullscreen-btn {
  background: none;
  border: none;
  padding: 0.2rem;
  cursor: pointer;
  color: var(--dim);
  display: flex;
  align-items: center;
  transition: color 0.18s, transform 0.15s;
}
#fullscreen-btn svg { width: 14px; height: 14px; display: block; }
#fullscreen-btn:hover { color: var(--text); transform: scale(1.15); }

#progress-track {
  position: relative;
  height: 3px;
  background: rgba(255,255,255,0.12);
  border-radius: 100px;
  overflow: hidden;
}

#progress-fill {
  position: absolute;
  top: 0; left: 0;
  height: 100%;
  width: 100%;
  border-radius: 100px;
  background: linear-gradient(to right, rgba(167,139,250,0.9), rgba(96,165,250,0.9));
  transition: background 2s ease;
}

/* ─── TOP BAR ────────────────────────────────────────────── */
#top-bar {
  position: absolute;
  top: 1.4rem;
  right: 1.6rem;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
#logout-btn {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--dim);
  font-family: var(--font-body);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.38rem 0.9rem;
  border-radius: 100px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
#logout-btn:hover { background: rgba(255,255,255,0.12); color: var(--text); }

/* ─── FOOTER ─────────────────────────────────────────────── */
.site-footer {
  font-family: var(--font-body);
  font-size: 0.72rem;
  color: var(--dim);
  letter-spacing: 0.03em;
  text-align: center;
  padding: 0.5rem 1rem;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.site-footer a {
  color: var(--dim);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.18s;
}
.site-footer a:hover { color: var(--text); }
.site-footer--visualizer {
  margin-top: 0.75rem;
  text-align: center;
  pointer-events: all;
}

/* Dot separator between footer items */
.footer-sep {
  user-select: none;
  font-size: 1.3em;
}

/* Footer tooltip — same look as .why-tooltip, opens upward */
.footer-why-row {
  position: relative;
  display: inline-flex;
  align-items: center;
}
.footer-why-link {
  font-family: var(--font-body);
  font-size: 0.72rem;
  color: var(--dim);
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
  transition: color 0.18s;
  white-space: nowrap;
}
.footer-why-link:hover { color: var(--text); }
.footer-why-tooltip {
  display: none;
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  width: 300px;
  background: rgba(18,18,28,0.97);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--dim);
  line-height: 1.65;
  text-align: left;
  pointer-events: none;
  z-index: 100;
  box-shadow: 0 8px 32px rgba(0,0,0,0.6);
}
.footer-why-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: rgba(18,18,28,0.97);
}
.footer-why-row:hover .footer-why-tooltip,
.footer-why-link:focus .footer-why-tooltip { display: block; }