/* ============================================================================
   TaskFlow — Liquid Glass design system (§10 of TZ.md)
   Physically-plausible glass: thickness, edge refraction, specular bevel,
   inner glow, reacts to motion. Layers: live background -> glass -> content.
   ============================================================================ */

/* ---------------------------------------------------------------------------
   §10.2  Tokens
   --------------------------------------------------------------------------- */
:root {
  /* Background */
  --bg-base:        #06070C;
  --bg-elevated:    #0C0E16;

  /* Glass */
  --glass-fill:     rgba(255,255,255,0.055);
  --glass-fill-hi:  rgba(255,255,255,0.10);
  --glass-stroke:   rgba(255,255,255,0.14);
  --glass-stroke-hi:rgba(255,255,255,0.28);
  --glass-blur:     28px;
  --glass-sat:      180%;

  /* Shadows & glow */
  --shadow-drop:    0 16px 48px -12px rgba(0,0,0,0.70);
  --shadow-inner:   inset 0 1px 0 rgba(255,255,255,0.22),
                    inset 0 -1px 0 rgba(255,255,255,0.05);
  --glow-accent:    0 0 40px -8px rgba(110,120,255,0.55);

  /* Accents */
  --accent-1:       #6E78FF;
  --accent-2:       #B15CFF;
  --accent-3:       #34E7C5;
  --accent-grad:    linear-gradient(135deg, var(--accent-1), var(--accent-2));

  /* Semantic */
  --success:        #34E7C5;
  --warning:        #FFB84D;
  --danger:         #FF5C7A;
  --info:           #57B7FF;

  /* Text */
  --text-1:         rgba(255,255,255,0.96);
  --text-2:         rgba(255,255,255,0.62);
  --text-3:         rgba(255,255,255,0.36);

  /* Geometry */
  --r-sm: 14px; --r-md: 22px; --r-lg: 30px; --r-xl: 40px; --r-full: 999px;
  --sp-1: 4px; --sp-2: 8px; --sp-3: 12px; --sp-4: 16px; --sp-5: 24px; --sp-6: 32px;

  /* Curves */
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --t-fast: 160ms; --t-base: 280ms; --t-slow: 480ms;

  /* Telegram safe-area insets (fed by JS in main.js) */
  --sat: 0px; /* top */
  --sab: 0px; /* bottom */
  --sal: 0px; /* left */
  --sar: 0px; /* right */
}

/* ---------------------------------------------------------------------------
   §10.8  Typography — Inter Tight (loaded locally, font-display: swap)
   --------------------------------------------------------------------------- */
@font-face {
  font-family: "Inter Tight";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  /* Local subset expected in assets/fonts; falls back to system if missing */
  src: local("Inter Tight"), local("InterTight-Regular"),
       url("../assets/fonts/InterTight.woff2") format("woff2");
}

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

html, body {
  margin: 0; padding: 0;
  height: 100%;
  overflow: hidden; /* app-shell handles scroll per screen */
}

body {
  font-family: "Inter Tight", -apple-system, BlinkMacSystemFont, "SF Pro Text",
               "Segoe UI", Roboto, system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-1);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  user-select: none;
}

h1, h2, h3, h4 {
  margin: 0;
  letter-spacing: -0.03em;
  line-height: 1.15;
  font-weight: 600;
}

.num, .money {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.t-11 { font-size: 11px; } .t-13 { font-size: 13px; } .t-15 { font-size: 15px; }
.t-17 { font-size: 17px; } .t-20 { font-size: 20px; } .t-24 { font-size: 24px; }
.t-32 { font-size: 32px; } .t-44 { font-size: 44px; }
.text-2 { color: var(--text-2); } .text-3 { color: var(--text-3); }
.text-grad {
  background: var(--accent-grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.text-success { color: var(--success); } .text-danger { color: var(--danger); }
.text-warning { color: var(--warning); } .text-info { color: var(--info); }
.w-500 { font-weight: 500; } .w-600 { font-weight: 600; } .w-700 { font-weight: 700; }

/* ---------------------------------------------------------------------------
   §10.5  Live background (aurora)
   --------------------------------------------------------------------------- */
.aurora {
  position: fixed; inset: -20%;
  z-index: -1;
  background:
    radial-gradient(38% 42% at 22% 28%, rgba(110,120,255,0.42), transparent 70%),
    radial-gradient(34% 38% at 78% 72%, rgba(177,92,255,0.34), transparent 70%),
    radial-gradient(30% 30% at 60% 12%, rgba(52,231,197,0.18), transparent 70%),
    var(--bg-base);
  filter: blur(70px);
  animation: aurora-drift 26s var(--ease-out) infinite alternate;
  pointer-events: none;
}
@keyframes aurora-drift {
  0%   { transform: translate3d(0,0,0) scale(1); }
  50%  { transform: translate3d(3%, -4%, 0) scale(1.08); }
  100% { transform: translate3d(-4%, 3%, 0) scale(1.04); }
}

/* ---------------------------------------------------------------------------
   §10.3  Base glass class — edge bevel (::before) + specular (::after)
   --------------------------------------------------------------------------- */
.glass {
  position: relative;
  background: var(--glass-fill);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border-radius: var(--r-md);
  box-shadow: var(--shadow-drop), var(--shadow-inner);
  isolation: isolate;
}

/* Edge bevel: gradient border via mask */
.glass::before {
  content: "";
  position: absolute; inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(
    140deg,
    rgba(255,255,255,0.55) 0%,
    rgba(255,255,255,0.06) 38%,
    rgba(255,255,255,0.02) 62%,
    rgba(255,255,255,0.30) 100%
  );
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
  z-index: 1;
}

/* Specular highlight that follows pointer/tap (--mx/--my set by tilt.js) */
.glass::after {
  content: "";
  position: absolute; inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    260px circle at var(--mx, 50%) var(--my, 0%),
    rgba(255,255,255,0.16), transparent 62%
  );
  opacity: 0;
  transition: opacity var(--t-base) var(--ease-out);
  pointer-events: none;
  z-index: 1;
}
.glass:hover::after, .glass:active::after { opacity: 1; }

/* §10.4 edge refraction — apply pointwise (header/tabbar/sheet), gated off in lists */
.glass--refract { filter: url(#liquid-refraction); }

/* ---------------------------------------------------------------------------
   §10.6  Components
   --------------------------------------------------------------------------- */

/* glass-card */
.glass-card {
  border-radius: var(--r-lg);
  padding: var(--sp-4);
  transition: transform var(--t-base) var(--ease-out),
              background var(--t-base) var(--ease-out);
  contain: layout paint; /* §10.9.3 */
}
.glass-card:hover { transform: translateY(-2px); background: var(--glass-fill-hi); }

/* In lists: inner cards drop their own backdrop-filter (§10.9.1). The parent
   list container provides the single blur layer. */
.list-flat .glass-card {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  background: var(--glass-fill);
}

/* glass-pill */
.glass-pill {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  height: 34px; padding: 0 var(--sp-3);
  border-radius: var(--r-full);
  font-size: 13px; font-weight: 500;
  white-space: nowrap;
}
.glass-pill.sm { height: 26px; font-size: 11px; padding: 0 10px; }

/* Buttons */
.btn {
  position: relative;
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--sp-2);
  border: none; outline: none; cursor: pointer;
  font-family: inherit; font-size: 15px; font-weight: 600;
  color: var(--text-1);
  padding: 14px var(--sp-5);
  border-radius: var(--r-md);
  transition: transform var(--t-fast) var(--ease-spring);
  overflow: hidden;
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.45; pointer-events: none; }

.glass-button--primary {
  background: var(--accent-grad);
  box-shadow: var(--glow-accent), var(--shadow-inner);
}
.glass-button--primary::before { /* bevel on top of gradient */
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, rgba(255,255,255,0.55), rgba(255,255,255,0.05) 50%, rgba(255,255,255,0.30));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}
.glass-button--ghost {
  background: var(--glass-fill);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  box-shadow: var(--shadow-inner);
}
.glass-button--ghost::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: linear-gradient(140deg, rgba(255,255,255,0.4), rgba(255,255,255,0.04) 55%, rgba(255,255,255,0.2));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}
.glass-button--danger { background: linear-gradient(135deg, #FF5C7A, #B1305C); box-shadow: 0 0 40px -8px rgba(255,92,122,0.5); }
.glass-button--success { background: linear-gradient(135deg, #34E7C5, #21A78C); box-shadow: 0 0 40px -8px rgba(52,231,197,0.5); color: #04120E; }
.btn.block { display: flex; width: 100%; }

/* glass-tabbar (§10.6) */
.glass-tabbar {
  position: fixed; left: var(--sp-3); right: var(--sp-3);
  bottom: calc(var(--sab) + var(--sp-2));
  height: 64px;
  display: flex; align-items: stretch;
  border-radius: var(--r-xl);
  backdrop-filter: blur(32px) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(32px) saturate(var(--glass-sat));
  background: var(--glass-fill);
  box-shadow: var(--shadow-drop), var(--shadow-inner);
  z-index: 40;
  padding: 6px;
}
.glass-tabbar::before { /* bevel */
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: linear-gradient(140deg, rgba(255,255,255,0.5), rgba(255,255,255,0.05) 55%, rgba(255,255,255,0.28));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}
.tabbar-indicator { /* the pill that slides under the active tab */
  position: absolute; top: 6px; bottom: 6px;
  border-radius: var(--r-lg);
  background: var(--glass-fill-hi);
  box-shadow: var(--shadow-inner), var(--glow-accent);
  transition: transform var(--t-base) var(--ease-spring), width var(--t-base) var(--ease-spring);
  z-index: 0;
}
.tabbar-btn {
  position: relative; z-index: 1;
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 3px;
  background: none; border: none; cursor: pointer;
  color: var(--text-3); font-family: inherit; font-size: 10px; font-weight: 600;
  transition: color var(--t-base) var(--ease-out);
}
.tabbar-btn .ic { font-size: 20px; line-height: 1; transition: transform var(--t-base) var(--ease-spring); }
.tabbar-btn.active { color: var(--text-1); }
.tabbar-btn.active .ic { transform: translateY(-1px) scale(1.06); }
.tabbar-badge {
  position: absolute; top: 8px; right: calc(50% - 22px);
  min-width: 16px; height: 16px; padding: 0 4px;
  border-radius: var(--r-full);
  background: var(--danger); color: #fff;
  font-size: 10px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}

/* Segmented control (Воркер / Заказчик) */
.segmented {
  position: relative;
  display: inline-flex;
  border-radius: var(--r-full);
  padding: 4px;
  background: var(--glass-fill);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  box-shadow: var(--shadow-inner);
}
.segmented::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: linear-gradient(140deg, rgba(255,255,255,0.4), rgba(255,255,255,0.04) 55%, rgba(255,255,255,0.2));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}
.segmented-thumb {
  position: absolute; top: 4px; bottom: 4px;
  border-radius: var(--r-full);
  background: var(--accent-grad);
  box-shadow: var(--glow-accent);
  transition: transform var(--t-base) var(--ease-spring), width var(--t-base) var(--ease-spring);
  z-index: 0;
}
.segmented button {
  position: relative; z-index: 1;
  border: none; background: none; cursor: pointer;
  color: var(--text-2); font-family: inherit; font-size: 13px; font-weight: 600;
  padding: 6px 16px; border-radius: var(--r-full);
  transition: color var(--t-base) var(--ease-out);
}
.segmented button.active { color: #fff; }

/* glass-sheet (bottom-sheet) */
.sheet-backdrop {
  position: fixed; inset: 0; z-index: 60;
  background: rgba(3,4,8,0.55);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  opacity: 0; transition: opacity var(--t-base) var(--ease-out);
}
.sheet-backdrop.open { opacity: 1; }
.glass-sheet {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 61;
  max-height: 92vh;
  border-radius: var(--r-xl) var(--r-xl) 0 0;
  background: var(--glass-fill);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  box-shadow: var(--shadow-drop), var(--shadow-inner);
  transform: translateY(100%);
  transition: transform var(--t-slow) var(--ease-out);
  display: flex; flex-direction: column;
  padding-bottom: calc(var(--sab) + var(--sp-4));
  overflow: hidden;
}
.glass-sheet.open { transform: translateY(0); }
.glass-sheet::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: linear-gradient(140deg, rgba(255,255,255,0.5), rgba(255,255,255,0.04) 55%, rgba(255,255,255,0.02));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}
.sheet-handle {
  width: 44px; height: 5px; border-radius: var(--r-full);
  background: var(--glass-stroke-hi);
  margin: 10px auto 4px;
  flex: none;
}
.sheet-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--sp-2) var(--sp-5) var(--sp-3);
  flex: none;
}
.sheet-body { padding: 0 var(--sp-5); overflow-y: auto; -webkit-overflow-scrolling: touch; }

/* glass-input */
.glass-input, textarea.glass-input, select.glass-input {
  width: 100%;
  background: var(--glass-fill);
  border: 1px solid var(--glass-stroke);
  border-radius: var(--r-md);
  color: var(--text-1);
  font-family: inherit; font-size: 15px;
  padding: 13px var(--sp-4);
  transition: border-color var(--t-fast) var(--ease-out), box-shadow var(--t-fast) var(--ease-out);
  outline: none;
}
.glass-input::placeholder { color: var(--text-3); }
.glass-input:focus, textarea.glass-input:focus, select.glass-input:focus {
  border-color: var(--glass-stroke-hi);
  box-shadow: var(--glow-accent);
}
.glass-input.invalid { border-color: var(--danger); }
textarea.glass-input { resize: vertical; min-height: 84px; }
.field-label { display: block; font-size: 13px; color: var(--text-2); margin-bottom: 6px; }
.field { margin-bottom: var(--sp-4); }
.field-error { color: var(--danger); font-size: 12px; margin-top: 4px; min-height: 14px; }

/* glass-toast */
.toast-stack {
  position: fixed; top: calc(var(--sat) + 10px); left: 0; right: 0;
  z-index: 90; display: flex; flex-direction: column; align-items: center; gap: 8px;
  pointer-events: none;
}
.glass-toast {
  pointer-events: auto;
  min-width: 220px; max-width: 90vw;
  padding: 12px 18px; border-radius: var(--r-md);
  background: var(--glass-fill);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  box-shadow: var(--shadow-drop), var(--shadow-inner);
  color: var(--text-1); font-size: 14px; font-weight: 500;
  border-left: 3px solid var(--info);
  transform: translateY(-16px); opacity: 0;
  transition: transform var(--t-base) var(--ease-spring), opacity var(--t-base) var(--ease-out);
}
.glass-toast.show { transform: translateY(0); opacity: 1; }
.glass-toast.success { border-left-color: var(--success); }
.glass-toast.error   { border-left-color: var(--danger); }
.glass-toast.warning { border-left-color: var(--warning); }

/* skeleton (§10.6) */
.skeleton {
  position: relative; overflow: hidden;
  background: var(--glass-fill);
  border-radius: var(--r-md);
}
.skeleton::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, transparent 20%, rgba(255,255,255,0.08) 50%, transparent 80%);
  transform: translateX(-100%);
  animation: shimmer 1.4s var(--ease-out) infinite;
}
@keyframes shimmer { to { transform: translateX(100%); } }

/* progress-ring — colored via SVG url(#accentGrad); see ProgressRing component */

/* Progress bar (task slot remaining) */
.progress-bar {
  height: 6px; border-radius: var(--r-full);
  background: rgba(255,255,255,0.08); overflow: hidden;
}
.progress-bar > span {
  display: block; height: 100%; border-radius: inherit;
  background: var(--accent-grad);
  transition: width var(--t-slow) var(--ease-out);
}

/* ---------------------------------------------------------------------------
   §10.7  Microinteractions
   --------------------------------------------------------------------------- */

/* Ripple */
.ripple {
  position: absolute; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.35), transparent 70%);
  transform: scale(0); opacity: 0.9;
  pointer-events: none;
  animation: ripple-expand 0.6s var(--ease-out) forwards;
}
@keyframes ripple-expand { to { transform: scale(2.4); opacity: 0; } }

/* Approve card fly-off */
.fly-right { animation: fly-right var(--t-slow) var(--ease-out) forwards; }
@keyframes fly-right {
  to { transform: translateX(120%) rotate(8deg); opacity: 0; }
}
.fly-left { animation: fly-left var(--t-slow) var(--ease-out) forwards; }
@keyframes fly-left {
  to { transform: translateX(-120%) rotate(-8deg); opacity: 0; }
}

/* View-transition fallback */
.screen-enter { animation: screen-enter var(--t-base) var(--ease-out); }
@keyframes screen-enter {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Tilt: elements get perspective + rotateX/Y via inline style (tilt.js) */
.tilt { transition: transform var(--t-base) var(--ease-spring); transform-style: preserve-3d; }

/* Counter-up flash */
.counter-flash { animation: counter-flash var(--t-slow) var(--ease-out); }
@keyframes counter-flash {
  0% { text-shadow: none; }
  40% { text-shadow: var(--glow-accent); }
  100% { text-shadow: none; }
}

/* Pulsing reserve badge */
.pulse { animation: pulse 1.6s var(--ease-out) infinite; }
@keyframes pulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(255,184,77,0.5); }
  50% { box-shadow: 0 0 18px 2px rgba(255,184,77,0.35); }
}

/* Confetti particle */
.confetti-piece {
  position: fixed; width: 8px; height: 12px; z-index: 95;
  pointer-events: none; will-change: transform, opacity;
}

/* ---------------------------------------------------------------------------
   §10.9  Performance gate
   --------------------------------------------------------------------------- */
body.perf-low {
  --glass-blur: 12px;
}
body.perf-low .aurora { animation: none; }
body.perf-low .glass--refract { filter: none; }
body.perf-low .tilt { transform: none !important; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .aurora { animation: none; }
}

/* Utility layout helpers */
.row { display: flex; align-items: center; }
.col { display: flex; flex-direction: column; }
.between { justify-content: space-between; }
.center { align-items: center; justify-content: center; }
.gap-1 { gap: var(--sp-1); } .gap-2 { gap: var(--sp-2); }
.gap-3 { gap: var(--sp-3); } .gap-4 { gap: var(--sp-4); }
.wrap { flex-wrap: wrap; }
.grow { flex: 1; }
.mt-2 { margin-top: var(--sp-2); } .mt-3 { margin-top: var(--sp-3); }
.mt-4 { margin-top: var(--sp-4); } .mt-5 { margin-top: var(--sp-5); }
.mb-2 { margin-bottom: var(--sp-2); } .mb-3 { margin-bottom: var(--sp-3); }
.mb-4 { margin-bottom: var(--sp-4); }
.hidden { display: none !important; }
.spin { animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }