@import url('https://fonts.googleapis.com/css2?family=Unbounded:wght@400;700;900&family=Manrope:wght@400;500;600;700&display=swap');

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

:root {
  --bg: #0B0B12;
  --card-bg: #1E1B2E;
  --accent: #8B5CF6;
  --accent2: #22D3EE;
  --danger: #F43F5E;
  --text: #F8FAFC;
  --text-sub: #94A3B8;
  --grad-main: linear-gradient(135deg, #8B5CF6, #22D3EE);
  --grad-viral: linear-gradient(135deg, #F43F5E, #8B5CF6, #22D3EE);
  --grad-dark: linear-gradient(180deg, #0B0B12, #1E1B2E);
}

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

#app { height: 100vh; position: relative; overflow: hidden; }

/* SCREENS */
.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  opacity: 0;
  pointer-events: none;
  transform: translateX(30px);
  transition: all 0.35s cubic-bezier(.4,0,.2,1);
  overflow-y: auto;
  overflow-x: hidden;
}
.screen.active {
  opacity: 1;
  pointer-events: all;
  transform: translateX(0);
}
.screen.exit {
  opacity: 0;
  transform: translateX(-30px);
}

/* WELCOME */
#screen-welcome {
  justify-content: center;
  align-items: center;
  background: var(--grad-dark);
  overflow: hidden;
}

.bg-waves {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 80%, rgba(139,92,246,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 80% 20%, rgba(34,211,238,0.08) 0%, transparent 60%);
  pointer-events: none;
}

.particles {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle 1px at 20% 30%, rgba(139,92,246,0.6) 0%, transparent 100%),
    radial-gradient(circle 1px at 80% 20%, rgba(34,211,238,0.5) 0%, transparent 100%),
    radial-gradient(circle 1px at 60% 70%, rgba(139,92,246,0.4) 0%, transparent 100%),
    radial-gradient(circle 1px at 40% 85%, rgba(34,211,238,0.4) 0%, transparent 100%),
    radial-gradient(circle 1.5px at 15% 60%, rgba(244,63,94,0.3) 0%, transparent 100%),
    radial-gradient(circle 1px at 90% 60%, rgba(139,92,246,0.4) 0%, transparent 100%);
  pointer-events: none;
}

.welcome-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 24px;
  text-align: center;
  gap: 0;
  position: relative;
  z-index: 1;
  width: 100%;
}

/* LOGO */
.logo-wrap {
  position: relative;
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.logo-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid transparent;
  background: linear-gradient(var(--bg), var(--bg)) padding-box,
              var(--grad-main) border-box;
  animation: ring-rotate 16s linear infinite;
}
.logo-ring::before {
  content: '';
  position: absolute;
  top: -4px; left: 30%;
  width: 8px; height: 8px;
  background: var(--accent2);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent2);
}
.logo-ring::after {
  content: '';
  position: absolute;
  bottom: -3px; right: 25%;
  width: 5px; height: 5px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent);
}

@keyframes ring-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.logo-inner {
  width: 80px; height: 80px;
  background: rgba(30,27,46,0.8);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 30px rgba(139,92,246,0.25);
  position: relative; z-index: 1;
}

.logo-title {
  font-family: 'Unbounded', sans-serif;
  font-size: 28px;
  font-weight: 700;
  background: var(--grad-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
}

.logo-sub {
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 40px;
}

.welcome-text h2 {
  font-family: 'Unbounded', sans-serif;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 10px;
}
.welcome-text p {
  font-size: 15px;
  color: var(--text-sub);
  margin-bottom: 40px;
}

/* BUTTONS */
.btn-primary {
  width: 100%;
  height: 54px;
  background: var(--grad-main);
  color: var(--text);
  border: none;
  border-radius: 18px;
  font-family: 'Manrope', sans-serif;
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s, opacity 0.15s;
  position: relative;
}
.btn-primary:active { transform: scale(0.97); opacity: 0.9; }
.btn-primary.glow { box-shadow: 0 4px 24px rgba(139,92,246,0.45); }

.btn-secondary {
  width: 100%;
  height: 50px;
  background: transparent;
  color: var(--text);
  border: 1.5px solid rgba(139,92,246,0.5);
  border-radius: 18px;
  font-family: 'Manrope', sans-serif;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 12px;
  transition: border-color 0.2s;
}
.btn-secondary:active { border-color: var(--accent); }

.btn-back {
  background: rgba(255,255,255,0.06);
  border: none;
  color: var(--text);
  font-size: 22px;
  width: 40px; height: 40px;
  border-radius: 12px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}

.btn-sm {
  background: rgba(139,92,246,0.15);
  border: 1px solid rgba(139,92,246,0.3);
  color: var(--text);
  font-family: 'Manrope', sans-serif;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 10px;
  cursor: pointer;
}
.btn-sm.danger { background: rgba(244,63,94,0.15); border-color: rgba(244,63,94,0.3); }

.btn-icon {
  background: rgba(255,255,255,0.06);
  border: none;
  color: var(--text);
  font-size: 20px;
  width: 40px; height: 40px;
  border-radius: 12px;
  cursor: pointer;
}

.btn-nav {
  background: rgba(139,92,246,0.2);
  border: 1px solid rgba(139,92,246,0.4);
  color: var(--text);
  font-size: 24px;
  width: 48px; height: 48px;
  border-radius: 14px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}

/* SCREEN HEADER */
.screen-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: rgba(11,11,18,0.95);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.screen-header h2 {
  font-family: 'Unbounded', sans-serif;
  font-size: 18px;
  font-weight: 700;
}

.screen-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  flex: 1;
}

/* FORMS */
.form-group { display: flex; flex-direction: column; gap: 10px; }
.form-group label { font-size: 14px; font-weight: 600; color: var(--text-sub); text-transform: uppercase; letter-spacing: 0.5px; }

.radio-group { display: flex; gap: 10px; }
.radio-card {
  flex: 1;
  background: var(--card-bg);
  border: 1.5px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  padding: 12px 8px;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.radio-card input { display: none; }
.radio-card.selected {
  border-color: var(--accent);
  background: rgba(139,92,246,0.12);
  color: var(--accent2);
}

.input-field {
  width: 100%;
  background: var(--card-bg);
  border: 1.5px solid rgba(148,163,184,0.25);
  border-radius: 14px;
  padding: 14px 16px;
  color: var(--text);
  font-family: 'Manrope', sans-serif;
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}
.input-field:focus { border-color: var(--accent); }
.input-field::placeholder { color: var(--text-sub); }
.input-field.textarea { min-height: 120px; resize: none; }

/* INPUT CARDS */
.input-cards { display: flex; flex-direction: column; gap: 10px; }
.input-card {
  background: var(--card-bg);
  border: 1.5px solid rgba(255,255,255,0.08);
  border-radius: 18px;
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.input-card.selected {
  border-color: var(--accent);
  background: rgba(139,92,246,0.1);
}
.input-card-icon { font-size: 24px; width: 40px; text-align: center; }
.input-card-text { display: flex; flex-direction: column; gap: 3px; }
.input-card-text strong { font-size: 15px; font-weight: 700; }
.input-card-text span { font-size: 13px; color: var(--text-sub); }

.input-section { animation: fadeIn 0.25s ease; }
.input-section.hidden { display: none; }

.upload-area {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100px;
  background: var(--card-bg);
  border: 2px dashed rgba(139,92,246,0.4);
  border-radius: 18px;
  padding: 20px;
  cursor: pointer;
  font-size: 15px;
  color: var(--text-sub);
  text-align: center;
}
.upload-area input { display: none; }

/* TRACKS LIST */
.tracks-controls { display: flex; gap: 8px; flex-wrap: wrap; }

.tracks-list {
  background: var(--card-bg);
  border-radius: 20px;
  overflow: hidden;
}
.track-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  transition: background 0.15s;
}
.track-item:last-child { border-bottom: none; }
.track-item:active { background: rgba(255,255,255,0.03); }

.track-checkbox {
  width: 22px; height: 22px;
  border: 2px solid rgba(148,163,184,0.4);
  border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  cursor: pointer;
  transition: all 0.15s;
}
.track-checkbox.checked {
  background: var(--grad-main);
  border-color: transparent;
}
.track-checkbox.checked::after {
  content: '✓';
  color: white;
  font-size: 13px;
  font-weight: 700;
}

.track-info { flex: 1; min-width: 0; }
.track-name { font-size: 14px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.track-artist { font-size: 12px; color: var(--text-sub); }

.track-delete {
  background: none;
  border: none;
  color: var(--text-sub);
  font-size: 18px;
  cursor: pointer;
  padding: 4px;
  border-radius: 8px;
  transition: color 0.15s;
}
.track-delete:active { color: var(--danger); }

.subtitle { font-size: 14px; color: var(--text-sub); margin-bottom: -8px; }

/* LOADING */
#screen-loading {
  justify-content: center;
  align-items: center;
  background: var(--grad-dark);
}
.loading-content { text-align: center; padding: 32px; display: flex; flex-direction: column; align-items: center; gap: 24px; }
.loading-logo { position: relative; width: 100px; height: 100px; display: flex; align-items: center; justify-content: center; }
.logo-ring.spinning { animation: ring-rotate 3s linear infinite; }
.loading-content h3 { font-family: 'Unbounded', sans-serif; font-size: 18px; font-weight: 700; }
.loading-content p { font-size: 14px; color: var(--text-sub); }

.loading-steps { display: flex; flex-direction: column; gap: 10px; width: 100%; }
.step {
  padding: 12px 16px;
  background: rgba(255,255,255,0.04);
  border-radius: 12px;
  font-size: 14px;
  color: var(--text-sub);
  text-align: left;
  transition: all 0.3s;
}
.step.active {
  background: rgba(139,92,246,0.15);
  color: var(--text);
  border-left: 3px solid var(--accent);
}
.step.done {
  background: rgba(34,211,238,0.08);
  color: var(--accent2);
  border-left: 3px solid var(--accent2);
}

/* CARDS */
#screen-cards { background: var(--bg); }
.cards-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  margin: 16px;
  border-radius: 28px;
}

.result-card {
  position: absolute;
  inset: 0;
  border-radius: 28px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  opacity: 0;
  transform: translateX(100%);
  transition: all 0.4s cubic-bezier(.4,0,.2,1);
  overflow: hidden;
}
.result-card.active {
  opacity: 1;
  transform: translateX(0);
}
.result-card.prev {
  opacity: 0;
  transform: translateX(-100%);
}
.result-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: inherit;
  border-radius: 28px;
}
.card-deco {
  position: absolute;
  inset: 0;
  overflow: hidden;
  border-radius: 28px;
  pointer-events: none;
}
.card-deco::before {
  content: '';
  position: absolute;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  top: -60px; right: -60px;
  filter: blur(40px);
}
.card-deco::after {
  content: '';
  position: absolute;
  width: 150px; height: 150px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
  bottom: -40px; left: -40px;
  filter: blur(30px);
}

.card-top { display: flex; justify-content: space-between; align-items: flex-start; position: relative; z-index: 1; }
.card-counter-badge {
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 700;
}
.card-label {
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 600;
}

.card-mid { flex: 1; display: flex; flex-direction: column; justify-content: center; gap: 12px; padding: 20px 0; position: relative; z-index: 1; }
.card-title { font-family: 'Unbounded', sans-serif; font-size: 22px; font-weight: 700; line-height: 1.2; }
.card-text { font-size: 15px; line-height: 1.6; opacity: 0.9; }
.card-extra { font-size: 13px; opacity: 0.7; font-weight: 600; }

.card-bottom { position: relative; z-index: 1; }
.card-share-btn {
  width: 100%;
  height: 48px;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 14px;
  color: white;
  font-family: 'Manrope', sans-serif;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}

.cards-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 16px;
  background: var(--bg);
}
#card-counter { font-size: 15px; font-weight: 700; color: var(--text-sub); min-width: 50px; text-align: center; }

/* PAYWALL */
#screen-paywall { background: var(--bg); }
.paywall-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 100% 60% at 50% 0%, rgba(244,63,94,0.15) 0%, transparent 60%),
              radial-gradient(ellipse 80% 50% at 50% 100%, rgba(139,92,246,0.12) 0%, transparent 60%);
  pointer-events: none;
}
.paywall-body { position: relative; z-index: 1; align-items: center; text-align: center; }
.paywall-icon { font-size: 56px; margin-bottom: -8px; }
.paywall-body h2 { font-family: 'Unbounded', sans-serif; font-size: 24px; font-weight: 700; }
.paywall-sub { font-size: 15px; color: var(--text-sub); max-width: 280px; }

.paywall-features {
  width: 100%;
  background: var(--card-bg);
  border-radius: 20px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.feature-item { font-size: 14px; font-weight: 600; text-align: left; }

.pricing-cards { display: flex; gap: 12px; width: 100%; }
.price-card {
  flex: 1;
  background: var(--card-bg);
  border: 1.5px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  padding: 16px 12px;
  text-align: center;
  cursor: pointer;
  transition: transform 0.15s, border-color 0.2s;
  position: relative;
}
.price-card.featured {
  border-color: var(--accent);
  background: rgba(139,92,246,0.1);
  transform: scale(1.03);
}
.price-card:active { transform: scale(0.97); }
.price-badge {
  position: absolute;
  top: -10px; left: 50%;
  transform: translateX(-50%);
  background: var(--grad-main);
  color: white;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 10px;
  white-space: nowrap;
}
.price-amount { font-family: 'Unbounded', sans-serif; font-size: 20px; font-weight: 700; }
.price-desc { font-size: 14px; font-weight: 600; color: var(--text-sub); margin-top: 4px; }
.price-hint { font-size: 12px; color: var(--text-sub); margin-top: 4px; }

/* HOME */
.home-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: rgba(11,11,18,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.home-logo-text {
  font-family: 'Unbounded', sans-serif;
  font-size: 20px;
  font-weight: 700;
  background: var(--grad-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.home-credits {
  background: rgba(139,92,246,0.15);
  border: 1px solid rgba(139,92,246,0.3);
  border-radius: 12px;
  padding: 6px 14px;
  font-size: 14px;
  font-weight: 700;
}

.services-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.service-card {
  background: var(--card-bg);
  border: 1.5px solid rgba(255,255,255,0.06);
  border-radius: 22px;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: transform 0.15s, border-color 0.2s, box-shadow 0.2s;
  text-align: center;
}
.service-card:active { transform: scale(0.95); border-color: var(--accent); box-shadow: 0 0 20px rgba(139,92,246,0.2); }
.service-icon { font-size: 36px; }
.service-name { font-family: 'Unbounded', sans-serif; font-size: 13px; font-weight: 700; }
.service-desc { font-size: 12px; color: var(--text-sub); }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}