/* ===========================
   DESIGN TOKENS
   =========================== */
:root {
  /* Colors */
  --bg-primary: #07030f;
  --bg-secondary: #12072f;
  --bg-tertiary: #1d0f4b;
  --bg-glass: rgba(30, 10, 70, 0.55);
  
  --text-primary: #f8f5ff;
  --text-secondary: #d9cfff;
  --text-tertiary: #b8a7ff;
  
  --accent-primary: #c17aff;
  --accent-secondary: #8a5dff;
  --accent-tertiary: #f9f0ff;
  
  --gradient-main: linear-gradient(135deg, #9f5bff 0%, #7f45ff 45%, #3f24d6 100%);
  --gradient-glow: radial-gradient(circle, rgba(193, 122, 255, 0.24) 0%, transparent 70%);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-hover: rgba(255, 255, 255, 0.12);
  
  /* Shadows */
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 64px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 32px rgba(106, 90, 255, 0.2);
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-base: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  
  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 32px;
  --font-size-4xl: 48px;
  
  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-base: 250ms ease-out;
  --transition-smooth: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 15% 40%, rgba(193, 122, 255, 0.18) 0%, transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(143, 80, 255, 0.12) 0%, transparent 45%);
  pointer-events: none;
  z-index: -1;
}

/* ===========================
   TYPOGRAPHY
   =========================== */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 600;
}

p {
  line-height: 1.6;
  color: var(--text-secondary);
}

/* ===========================
   NAVBAR
   =========================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(22, 8, 58, 0.88);
  backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: all var(--transition-base);
}

.navbar-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-base) var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-base);
  cursor: pointer;
}

.brand-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  background: var(--gradient-main);
  border-radius: var(--radius-lg);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-name {
  font-size: var(--font-size-lg);
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-subtext {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-base);
}

.user-status {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  padding: var(--space-sm) var(--space-base);
}

/* ===========================
   BUTTONS
   =========================== */
button {
  font-family: var(--font-family);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  font-size: var(--font-size-base);
  font-weight: 600;
  background: var(--gradient-main);
  color: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glow);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-smooth);
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 48px rgba(106, 90, 255, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-gradient {
  padding: 10px 20px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  background: var(--gradient-main);
  color: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glow);
  transition: all var(--transition-base);
}

.btn-gradient:hover {
  transform: scale(1.05);
  box-shadow: 0 0 48px rgba(106, 90, 255, 0.4);
}

.btn-gradient.connected {
  background: linear-gradient(135deg, rgba(126, 67, 255, 1), rgba(82, 40, 202, 1));
  box-shadow: 0 0 60px rgba(126, 67, 255, 0.35);
}

.btn-ghost {
  padding: 10px 16px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  transition: all var(--transition-base);
}

.btn-ghost:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: rgba(106, 90, 255, 0.08);
}

/* ===========================
   HERO SECTION
   =========================== */
.hero {
  position: relative;
  min-height: 240px;
  overflow: hidden;
  padding: calc(var(--space-lg) + 8px) var(--space-lg);
  margin-bottom: calc(var(--space-xl) + 4px);
}

.hero-background {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(193, 122, 255, 0.16) 0%, transparent 40%),
    radial-gradient(circle at bottom right, rgba(109, 61, 255, 0.18) 0%, transparent 35%),
    linear-gradient(135deg, rgba(9, 3, 24, 0.96) 0%, rgba(27, 10, 61, 0.98) 100%);
}

.hero-glow {
  position: absolute;
  top: -140px;
  right: -120px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.16) 0%, transparent 68%);
  animation: float 10s ease-in-out infinite;
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.05;
  margin-bottom: var(--space-sm);
  animation: fadeInUp 0.8s ease-out;
}

.gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.hero-subtitle {
  font-size: 0.98rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-base);
  animation: fadeInUp 0.8s ease-out 0.1s both;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.hero-elements,
.float-element {
  display: none;
}

/* ===========================
   MAIN CONTAINER
   =========================== */
.main-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg) var(--space-3xl);
  position: relative;
  z-index: 10;
}

.generator-section {
  margin-top: var(--space-xl);
}

.generator-section {
  margin-top: var(--space-xl);
}

/* ===========================
   QUICK SUGGESTIONS
   =========================== */
.quick-suggestions {
  margin-bottom: var(--space-3xl);
}

.section-suptitle {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.suggestions-copy {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 760px;
  margin-bottom: var(--space-lg);
}

.suggestions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-base);
}

.suggestion-card {
  padding: calc(var(--space-lg) - 4px);
  background: rgba(33, 9, 88, 0.82);
  border: 1px solid rgba(193, 122, 255, 0.2);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
}

.suggestion-card:hover {
  border-color: rgba(193, 122, 255, 0.35);
  background: rgba(80, 31, 166, 0.95);
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(86, 36, 184, 0.22);
}

.suggestion-icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(193, 122, 255, 0.18);
  font-size: 24px;
}

.suggestion-text {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
}

/* ===========================
   GENERATOR SECTION
   =========================== */
.generator-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.generator-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.generator-initial,
.generator-chat {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.input-wrapper {
  display: flex;
  align-items: flex-start;
  gap: var(--space-base);
  padding: var(--space-lg);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.input-wrapper:hover {
  border-color: var(--border-color-hover);
  background: rgba(255, 255, 255, 0.04);
}

.input-wrapper:focus-within {
  border-color: var(--accent-primary);
  background: rgba(106, 90, 255, 0.08);
  box-shadow: 0 0 0 3px rgba(106, 90, 255, 0.1);
}

.input-icon {
  width: 24px;
  height: 24px;
  color: var(--accent-primary);
  flex-shrink: 0;
  margin-top: 8px;
}

.input-field {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  outline: none;
  resize: none;
  line-height: 1.5;
}

.input-field::placeholder {
  color: var(--text-tertiary);
}

.controls-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.control-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.slider {
  width: 100%;
  height: 6px;
  border-radius: var(--radius-md);
  background: linear-gradient(90deg, var(--bg-tertiary), rgba(106, 90, 255, 0.2));
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--gradient-main);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-glow);
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 24px rgba(106, 90, 255, 0.4);
}

.slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--gradient-main);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-glow);
}

.slider::-moz-range-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 24px rgba(106, 90, 255, 0.4);
}

.control-value {
  font-size: var(--font-size-xs);
  color: var(--accent-secondary);
  font-weight: 600;
}

/* ===========================
   LOADER
   =========================== */
.loader-container {
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn var(--transition-base);
}

.loader-card {
  padding: var(--space-2xl);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(16px);
}

.loader-animated {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.loader-circle {
  width: 60px;
  height: 60px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-right-color: var(--accent-secondary);
  border-radius: 50%;
  animation: spin 1.2s linear infinite;
}

.loader-text {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===========================
   RESULTS SECTION
   =========================== */
.results-section {
  animation: fadeInUp var(--transition-base);
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border-color);
}

.results-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
}

.playlist-container {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  backdrop-filter: blur(16px);
}

.playlist-list {
  list-style: none;
  display: flex;
  flex-direction: column;
}

.track-item {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr) auto;
  gap: var(--space-lg);
  align-items: center;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-base);
  animation: slideIn var(--transition-base);
}

.track-item:last-child {
  border-bottom: none;
}

.track-item:hover {
  background: rgba(106, 90, 255, 0.08);
  transform: translateX(2px);
}

.track-thumb {
  width: 80px;
  height: 80px;
  border-radius: 22px;
  object-fit: cover;
  box-shadow: 0 18px 34px rgba(0, 0, 0, 0.24);
  flex-shrink: 0;
  background: linear-gradient(135deg, rgba(186, 106, 255, 0.16), rgba(125, 58, 255, 0.14));
}

.track-info {
  min-width: 0;
}

.track-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.track-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.track-artist {
  font-size: 0.9rem;
  color: var(--text-tertiary);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 10px 18px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  background: rgba(88, 35, 178, 0.16);
  color: var(--accent-tertiary);
  border: 1px solid rgba(146, 96, 255, 0.25);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  flex-shrink: 0;
  margin-left: var(--space-base);
}

.btn-secondary:hover {
  background: rgba(138, 93, 255, 0.18);
  border-color: rgba(193, 122, 255, 0.35);
  transform: translateY(-1px);
}

.btn-secondary.added {
  background: rgba(95, 37, 189, 0.98);
  color: #ffffff;
  border-color: rgba(193, 122, 255, 0.45);
}

.btn-secondary.added:hover {
  background: rgba(128, 54, 224, 1);
}

.btn-secondary.added svg {
  stroke: currentColor;
}

/* ===========================
   FOOTER
   =========================== */
.footer {
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
  border-top: 1px solid var(--border-color);
  color: var(--text-tertiary);
  font-size: var(--font-size-sm);
  margin-top: var(--space-3xl);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
}

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

.icon-sm {
  width: 20px;
  height: 20px;
}

/* ===========================
   ANIMATIONS
   =========================== */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-10px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ===========================
   RESPONSIVE DESIGN
   =========================== */
@media (max-width: 768px) {
  :root {
    --font-size-4xl: 32px;
    --font-size-2xl: 20px;
    --space-3xl: 40px;
    --space-2xl: 32px;
  }

  .navbar-container {
    flex-direction: column;
    gap: var(--space-base);
  }

  .navbar-actions {
    width: 100%;
    justify-content: space-between;
  }

  .hero {
    min-height: 350px;
    padding: var(--space-2xl) var(--space-base);
  }

  .main-container {
    padding: 0 var(--space-base) var(--space-2xl);
  }

  .suggestions-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .controls-row {
    grid-template-columns: 1fr;
  }

  .results-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-base);
  }

  .track-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-base);
  }

  .btn-secondary {
    width: 100%;
    margin: 0;
  }

  .generator-chat {
    gap: var(--space-base);
  }

  .generator-chat .input-wrapper {
    padding: var(--space-base);
  }

  .btn-primary {
    width: 100%;
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-4xl: 28px;
    --font-size-lg: 16px;
    --space-xl: 24px;
    --space-lg: 16px;
  }

  .brand-text {
    display: none;
  }

  .hero-glow {
    width: 400px;
    height: 400px;
    top: -150px;
    right: -150px;
  }

  .suggestions-grid {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: 24px;
  }

  .generator-card {
    padding: var(--space-lg);
  }
}