/* ===== RESET & ROOT ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:           #0a0a12;
  --surface:      #13131f;
  --surface-2:    #1c1c2e;
  --border:       rgba(255,255,255,0.08);
  --border-glow:  rgba(255,45,85,0.35);
  --pink:         #FF2D55;
  --purple:       #8B00FF;
  --cyan:         #00F0FF;
  --text:         #f0f0f8;
  --text-muted:   #7a7a9a;
  --text-dim:     #4a4a6a;
  --radius:       16px;
  --radius-sm:    10px;
  --shadow:       0 8px 40px rgba(0,0,0,0.6);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* ===== BACKGROUND BLOBS ===== */
.bg-blobs { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.18;
  animation: drift 18s ease-in-out infinite alternate;
}
.blob-1 { width: 600px; height: 600px; background: var(--pink); top: -200px; left: -200px; animation-delay: 0s; }
.blob-2 { width: 500px; height: 500px; background: var(--purple); bottom: -150px; right: -150px; animation-delay: -6s; }
.blob-3 { width: 400px; height: 400px; background: var(--cyan); top: 50%; left: 50%; transform: translate(-50%,-50%); animation-delay: -12s; opacity: 0.08; }
@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(40px, 30px) scale(1.08); }
}

/* ===== APP WRAPPER ===== */
.app-wrapper {
  position: relative; z-index: 1;
  max-width: 680px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

/* ===== HEADER ===== */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 48px;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-text {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text);
}
.logo-accent { color: var(--pink); }
.header-badge {
  font-size: 12px;
  font-weight: 600;
  color: var(--cyan);
  background: rgba(0,240,255,0.08);
  border: 1px solid rgba(0,240,255,0.2);
  padding: 4px 12px;
  border-radius: 100px;
  letter-spacing: 0.5px;
}

/* ===== HERO ===== */
.hero { text-align: center; margin-bottom: 40px; }
.hero-title {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 14px;
}
.gradient-text {
  background: linear-gradient(90deg, var(--pink), var(--purple), var(--cyan));
  background-size: 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 4s linear infinite;
}
@keyframes shimmer { 0%{background-position:0%} 100%{background-position:200%} }
.hero-sub { font-size: 16px; color: var(--text-muted); max-width: 460px; margin: 0 auto; }

/* ===== TABS ===== */
.tabs {
  display: flex;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px;
  margin-bottom: 20px;
}
.tab {
  flex: 1;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 16px;
  border: none; cursor: pointer;
  border-radius: calc(var(--radius) - 4px);
  font-size: 14px; font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  transition: all 0.2s;
}
.tab:hover { color: var(--text); background: var(--surface-2); }
.tab.active {
  color: var(--text);
  background: linear-gradient(135deg, rgba(255,45,85,0.2), rgba(139,0,255,0.2));
  border: 1px solid rgba(255,45,85,0.3);
}
.tab svg { opacity: 0.7; }

/* ===== PANELS ===== */
.panel { animation: fadeUp 0.3s ease; }
.panel.hidden { display: none; }
@keyframes fadeUp { from{opacity:0;transform:translateY(12px)} to{opacity:1;transform:none} }

/* ===== URL INPUT ===== */
.url-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.url-input-wrap:focus-within {
  border-color: var(--pink);
  box-shadow: 0 0 0 3px rgba(255,45,85,0.12);
}
.url-icon { padding: 0 14px; color: var(--text-dim); flex-shrink: 0; }
.url-input {
  flex: 1;
  background: transparent;
  border: none; outline: none;
  color: var(--text);
  font-size: 15px;
  padding: 16px 0;
}
.url-input::placeholder { color: var(--text-dim); }
.clear-btn {
  background: none; border: none; cursor: pointer;
  color: var(--text-dim); padding: 0 16px;
  font-size: 16px; transition: color 0.2s;
}
.clear-btn:hover { color: var(--text); }

/* ===== BUTTONS ===== */
.btn-primary {
  width: 100%;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  padding: 16px;
  background: linear-gradient(135deg, var(--pink), var(--purple));
  border: none; border-radius: var(--radius);
  color: white; font-size: 16px; font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, opacity 0.2s;
  box-shadow: 0 4px 24px rgba(255,45,85,0.35);
  letter-spacing: 0.3px;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(255,45,85,0.5); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.btn-outline {
  padding: 10px 24px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted); font-size: 14px; font-weight: 600;
  cursor: pointer; transition: all 0.2s; margin-top: 16px;
}
.btn-outline:hover { border-color: var(--pink); color: var(--text); }
.btn-reset {
  display: flex; align-items: center; gap: 8px;
  margin: 20px auto 0;
  padding: 10px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-muted); font-size: 14px; font-weight: 600;
  cursor: pointer; transition: all 0.2s;
}
.btn-reset:hover { border-color: var(--pink); color: var(--text); }
.btn-small {
  padding: 8px 16px;
  background: linear-gradient(135deg, var(--pink), var(--purple));
  border: none; border-radius: 8px;
  color: white; font-size: 13px; font-weight: 700;
  cursor: pointer; white-space: nowrap;
}

/* ===== INFO BOX ===== */
.info-box {
  display: flex; gap: 14px;
  background: rgba(0,240,255,0.05);
  border: 1px solid rgba(0,240,255,0.15);
  border-radius: var(--radius-sm);
  padding: 16px; margin-top: 16px;
  font-size: 13px; color: var(--text-muted);
  line-height: 1.7;
}
.info-icon { font-size: 20px; flex-shrink: 0; }
.info-content strong { color: var(--text); }

/* ===== SERVER NOTICE ===== */
.server-notice {
  background: rgba(255,45,85,0.05);
  border: 1px solid rgba(255,45,85,0.2);
  border-radius: var(--radius);
  padding: 20px; margin-top: 16px;
  font-size: 13px; color: var(--text-muted);
  line-height: 1.7;
}
.notice-header {
  display: flex; align-items: center; gap: 8px;
  font-size: 15px; font-weight: 700; color: var(--pink);
  margin-bottom: 10px;
}
.code-block {
  position: relative;
  background: #0d0d1a;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin: 10px 0;
  overflow: hidden;
}
.code-block pre {
  font-family: 'Courier New', Courier, monospace;
  font-size: 12px;
  color: #b0b0d0;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 260px;
  overflow-y: auto;
  line-height: 1.6;
}
.copy-code-btn {
  position: absolute; top: 10px; right: 10px;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 6px; color: var(--text-muted);
  font-size: 12px; font-weight: 600;
  padding: 4px 10px; cursor: pointer;
  transition: all 0.2s;
}
.copy-code-btn:hover { color: var(--text); border-color: var(--pink); }
.server-url-row { display: flex; gap: 8px; margin-top: 8px; }
.server-url-input {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 13px;
  padding: 8px 12px;
  outline: none;
  transition: border-color 0.2s;
}
.server-url-input:focus { border-color: var(--pink); }

/* ===== DROPZONE ===== */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 60px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s;
  background: var(--surface);
}
.dropzone:hover, .dropzone.drag-over {
  border-color: var(--pink);
  background: rgba(255,45,85,0.05);
}
.drop-icon { color: var(--text-dim); margin-bottom: 16px; }
.drop-text { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.drop-sub { font-size: 14px; color: var(--text-muted); }

/* ===== PROGRESS ===== */
.progress-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  margin-top: 20px;
  animation: fadeUp 0.3s ease;
}
.progress-section.hidden { display: none; }
.progress-steps {
  display: flex; align-items: center;
  margin-bottom: 24px; gap: 0;
}
.step { display: flex; flex-direction: column; align-items: center; gap: 6px; flex-shrink: 0; }
.step-dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--surface-2);
  border: 2px solid var(--border);
  transition: all 0.4s;
}
.step.active .step-dot {
  background: var(--pink);
  border-color: var(--pink);
  box-shadow: 0 0 10px rgba(255,45,85,0.6);
  animation: pulse 1s ease infinite;
}
.step.done .step-dot {
  background: #00c88c;
  border-color: #00c88c;
  animation: none;
  box-shadow: 0 0 8px rgba(0,200,140,0.5);
}
@keyframes pulse { 0%,100%{transform:scale(1)} 50%{transform:scale(1.3)} }
.step-label { font-size: 12px; color: var(--text-muted); font-weight: 600; text-align: center; white-space: nowrap; }
.step.active .step-label { color: var(--text); }
.step.done .step-label { color: #00c88c; }
.step-line { flex: 1; height: 2px; background: var(--border); margin: 0 8px; transition: background 0.4s; }
.step-line.done { background: #00c88c; }
.progress-bar-wrap {
  background: var(--surface-2);
  border-radius: 100px;
  height: 6px; overflow: hidden;
  margin-bottom: 12px;
}
.progress-bar {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--pink), var(--purple));
  border-radius: 100px;
  transition: width 0.4s ease;
}
.progress-label { font-size: 13px; color: var(--text-muted); text-align: center; }

/* ===== RESULT ===== */
.result-section {
  margin-top: 20px;
  animation: fadeUp 0.4s ease;
}
.result-section.hidden { display: none; }
.result-card {
  display: flex; align-items: center; gap: 16px;
  background: var(--surface);
  border: 1px solid rgba(0,200,140,0.3);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: 0 0 30px rgba(0,200,140,0.08);
  flex-wrap: wrap;
}
.result-icon { color: #00c88c; flex-shrink: 0; }
.result-info { flex: 1; min-width: 120px; }
.result-title { font-size: 15px; font-weight: 700; margin-bottom: 2px; word-break: break-all; }
.result-meta { font-size: 13px; color: var(--text-muted); }
.result-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.btn-play {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--border);
  color: var(--text);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all 0.2s; flex-shrink: 0;
}
.btn-play:hover { background: rgba(255,45,85,0.15); border-color: var(--pink); }
.btn-download {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--pink), var(--purple));
  border: none; border-radius: var(--radius-sm);
  color: white; font-size: 14px; font-weight: 700;
  cursor: pointer; transition: all 0.2s;
  box-shadow: 0 4px 16px rgba(255,45,85,0.3);
}
.btn-download:hover { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(255,45,85,0.5); }

/* ===== WAVEFORM ===== */
.waveform-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 12px;
  cursor: pointer;
}
.waveform-canvas { width: 100%; height: 80px; display: block; }
.time-display {
  display: flex; justify-content: space-between;
  font-size: 12px; color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  margin-top: 8px;
}

/* ===== ERROR ===== */
.error-section.hidden { display: none; }
.error-card {
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  background: rgba(255,45,85,0.06);
  border: 1px solid rgba(255,45,85,0.2);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  animation: fadeUp 0.3s ease;
  margin-top: 20px;
}
.error-icon { color: var(--pink); }
.error-msg { font-size: 15px; color: var(--text); max-width: 420px; line-height: 1.6; }

/* ===== FOOTER ===== */
.footer { text-align: center; margin-top: 40px; font-size: 12px; color: var(--text-dim); }

/* ===== UTILITY ===== */
.hidden { display: none !important; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface-2); border-radius: 100px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 520px) {
  .app-wrapper { padding: 24px 14px 48px; }
  .hero-title { font-size: 26px; letter-spacing: -1px; }
  .result-card { gap: 12px; }
  .progress-steps { gap: 0; }
  .step-label { font-size: 10px; }
  .tab { font-size: 13px; padding: 9px 10px; gap: 5px; }
}