/* ==========================================================
   Sa Re Ga Ma · Vocal Studio — base.css
   Core theme tokens, reset, typography & layout primitives
   ========================================================== */

:root {
  /* Core palette — premium dark music studio */
  --bg-0: #05050b;
  --bg-1: #0a0a14;
  --bg-2: #10101c;
  --bg-3: #161628;
  --bg-4: #1e1e34;

  /* Glass surfaces */
  --glass: rgba(255, 255, 255, 0.04);
  --glass-2: rgba(255, 255, 255, 0.07);
  --glass-3: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-strong: rgba(255, 255, 255, 0.16);

  /* Accent — musical gold + indigo */
  --accent: #f5b042;
  --accent-2: #ffce6a;
  --accent-deep: #c98a1a;
  --indigo: #6c63ff;
  --indigo-2: #8a82ff;
  --teal: #2dd4bf;
  --rose: #fb7185;
  --emerald: #34d399;
  --violet: #a78bfa;
  --sky: #38bdf8;

  /* Note gradient (saregama) */
  --sa: #ff6b9d;
  --re: #fb923c;
  --ga: #fbbf24;
  --ma: #34d399;
  --pa: #38bdf8;
  --dha: #818cf8;
  --ni: #c084fc;

  /* Text */
  --text: #f4f4f7;
  --text-2: #c8c8d6;
  --text-3: #8d8da0;
  --text-4: #5a5a72;
  --text-dim: #3a3a4e;

  /* States */
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 30px rgba(245, 176, 66, 0.35);

  /* Radius */
  --r-xs: 6px;
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --r-2xl: 36px;
  --r-full: 999px;

  /* Spacing */
  --gap-1: 4px;
  --gap-2: 8px;
  --gap-3: 12px;
  --gap-4: 16px;
  --gap-5: 20px;
  --gap-6: 24px;
  --gap-8: 32px;

  /* Layout */
  --sidebar-w: 260px;
  --topbar-h: 60px;
  --bottomnav-h: 64px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-top: env(safe-area-inset-top, 0px);

  /* Easing */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-2: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html,
body {
  height: 100%;
  width: 100%;
  overflow-x: hidden;
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg-0);
  background-image:
    radial-gradient(1100px 600px at 85% -10%, rgba(245, 176, 66, 0.12), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(108, 99, 255, 0.18), transparent 60%),
    radial-gradient(600px 400px at 50% 50%, rgba(45, 212, 191, 0.06), transparent 70%),
    linear-gradient(180deg, #060614 0%, #05050d 100%);
  background-attachment: fixed;
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  letter-spacing: -0.005em;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  color: inherit;
  border: 0;
  background: transparent;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

input,
select,
textarea {
  font: inherit;
  color: inherit;
  background: transparent;
  border: 0;
  outline: 0;
  -webkit-appearance: none;
  appearance: none;
}

ul,
ol {
  list-style: none;
}

/* Selection */
::selection {
  background: rgba(245, 176, 66, 0.35);
  color: #fff;
}

/* Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.18);
}

/* Typography helpers */
.h-display {
  font-family: "Playfair Display", "Inter", serif;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.mono {
  font-family: "JetBrains Mono", ui-monospace, Menlo, monospace;
  font-variant-numeric: tabular-nums;
}

/* App layout shell */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
  min-height: 100dvh;
}

.app.hidden {
  display: none;
}

/* Utility */
.hidden {
  display: none !important;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Page container */
.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  position: relative;
}

.page-container {
  flex: 1;
  padding: var(--gap-6);
  padding-bottom: calc(var(--bottomnav-h) + var(--safe-bottom) + 32px);
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
  animation: pageIn 0.45s var(--ease);
}

@keyframes pageIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page {
  display: flex;
  flex-direction: column;
  gap: var(--gap-6);
}

.page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--gap-4);
  flex-wrap: wrap;
}

.page-title {
  font-family: "Playfair Display", serif;
  font-weight: 700;
  font-size: clamp(26px, 4vw, 36px);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.page-title .accent {
  background: linear-gradient(135deg, var(--accent), var(--rose));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-subtitle {
  color: var(--text-3);
  font-size: 14px;
  margin-top: 6px;
  max-width: 60ch;
}

/* Cards & Glass */
.card {
  position: relative;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  box-shadow: var(--shadow-md);
  padding: var(--gap-5);
  overflow: hidden;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px 200px at var(--mx, 50%) var(--my, 0%), rgba(255, 255, 255, 0.06), transparent 60%);
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  pointer-events: none;
}

.card:hover::before {
  opacity: 1;
}

.card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--gap-2);
}

.card-value {
  font-family: "Playfair Display", serif;
  font-weight: 700;
  font-size: clamp(28px, 4vw, 36px);
  letter-spacing: -0.02em;
}

.card-sub {
  color: var(--text-3);
  font-size: 12px;
  margin-top: 4px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border-radius: var(--r-full);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.01em;
  background: var(--glass-2);
  border: 1px solid var(--glass-border);
  color: var(--text);
  transition: transform 0.15s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  -webkit-user-select: none;
  user-select: none;
  white-space: nowrap;
}

.btn:hover {
  background: var(--glass-3);
  border-color: var(--glass-border-strong);
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #1a0f00;
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 10px 24px -10px rgba(245, 176, 66, 0.6);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  box-shadow: 0 16px 30px -10px rgba(245, 176, 66, 0.7);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--glass-border);
}

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--r-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-block {
  width: 100%;
}

.btn-lg {
  min-height: 52px;
  padding: 0 24px;
  font-size: 15px;
}

.btn-sm {
  min-height: 36px;
  padding: 0 14px;
  font-size: 13px;
}

.btn-danger {
  background: linear-gradient(135deg, #f87171, #b91c1c);
  color: #fff;
}

/* Pills / chips */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--r-full);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: var(--glass-2);
  border: 1px solid var(--glass-border);
  color: var(--text-2);
  white-space: nowrap;
}

.chip-accent {
  background: rgba(245, 176, 66, 0.12);
  border-color: rgba(245, 176, 66, 0.3);
  color: var(--accent-2);
}

.chip-success {
  background: rgba(52, 211, 153, 0.12);
  border-color: rgba(52, 211, 153, 0.3);
  color: var(--success);
}

.chip-danger {
  background: rgba(248, 113, 113, 0.12);
  border-color: rgba(248, 113, 113, 0.3);
  color: var(--danger);
}

.chip-violet {
  background: rgba(167, 139, 250, 0.12);
  border-color: rgba(167, 139, 250, 0.3);
  color: var(--violet);
}

/* Grid utilities */
.grid {
  display: grid;
  gap: var(--gap-4);
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* Section title */
.section-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-2);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: var(--gap-3);
}

.section-title::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--indigo));
  box-shadow: 0 0 10px rgba(245, 176, 66, 0.6);
}

/* Form */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.field-help {
  font-size: 12px;
  color: var(--text-4);
}

.input,
.select,
.textarea {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-md);
  padding: 12px 14px;
  color: var(--text);
  font-size: 14px;
  min-height: 44px;
  transition: border-color 0.2s, background 0.2s;
}

.input:focus,
.select:focus,
.textarea:focus {
  border-color: var(--accent);
  background: var(--glass-2);
}

/* Range slider */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent) var(--val, 50%), rgba(255, 255, 255, 0.08) var(--val, 50%), rgba(255, 255, 255, 0.08) 100%);
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  border: 2px solid #fff;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(245, 176, 66, 0.5);
  transition: transform 0.15s;
}

input[type="range"]::-webkit-slider-thumb:active {
  transform: scale(1.15);
}

input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  border: 2px solid #fff;
  cursor: pointer;
}

/* Toggle */
.toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  width: 46px;
  height: 26px;
  background: var(--glass-2);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
  flex-shrink: 0;
}

.toggle::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
  transition: transform 0.25s var(--ease);
}

.toggle.on {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  border-color: rgba(255, 255, 255, 0.2);
}

.toggle.on::after {
  transform: translateX(20px);
}

/* Toast */
.toast-root {
  position: fixed;
  top: calc(var(--topbar-h) + 12px + var(--safe-top));
  right: 16px;
  left: 16px;
  z-index: 200;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.toast {
  pointer-events: auto;
  background: rgba(20, 20, 32, 0.92);
  border: 1px solid var(--glass-border-strong);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: var(--text);
  padding: 12px 16px;
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: toastIn 0.3s var(--ease);
  max-width: 360px;
}

.toast.success {
  border-color: rgba(52, 211, 153, 0.4);
}
.toast.error {
  border-color: rgba(248, 113, 113, 0.4);
}
.toast.info {
  border-color: rgba(56, 189, 248, 0.4);
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(-12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Modal */
.modal-root {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: fadeIn 0.2s var(--ease);
}

.modal-root.show {
  display: flex;
}

.modal {
  background: linear-gradient(160deg, rgba(30, 30, 50, 0.95), rgba(15, 15, 30, 0.95));
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--r-xl);
  padding: 24px;
  width: 100%;
  max-width: 460px;
  max-height: 86vh;
  overflow: auto;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.25s var(--ease);
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Loader */
.loader {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 50%, #0a0a1a 0%, #05050b 100%);
  transition: opacity 0.5s var(--ease), visibility 0.5s var(--ease);
}

.loader.hide {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
}

.loader-logo {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, var(--accent), var(--rose), var(--indigo), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  animation: spin 2.2s linear infinite;
  position: relative;
}

.loader-logo::after {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--bg-1);
}

.loader-note {
  position: relative;
  z-index: 1;
  font-size: 38px;
  color: var(--accent);
  text-shadow: 0 0 18px rgba(245, 176, 66, 0.7);
  animation: bounce 1s var(--ease) infinite alternate;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
@keyframes bounce {
  to {
    transform: translateY(-3px) scale(1.05);
  }
}

.loader-text {
  font-family: "Playfair Display", serif;
  font-size: 22px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  background: linear-gradient(90deg, var(--accent), var(--rose), var(--indigo), var(--accent));
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradient 3s linear infinite;
}

@keyframes gradient {
  to {
    background-position: 200% 0;
  }
}

.loader-bar {
  width: 160px;
  height: 3px;
  background: var(--glass);
  border-radius: 999px;
  overflow: hidden;
}

.loader-bar-fill {
  width: 40%;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--rose));
  border-radius: 999px;
  animation: slide 1.4s var(--ease) infinite;
}

@keyframes slide {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(250%);
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}