/* nyvvo · Soft Dark Premium System
   Soft, warm-leaning neutrals + emerald accent (oklch).
   3 surface tiers, 1 accent, refined type scale. */

:root {
  /* Surfaces — warm soft dark */
  --bg-0: oklch(0.16 0.008 250);   /* page bg */
  --bg-1: oklch(0.19 0.008 250);   /* card */
  --bg-2: oklch(0.22 0.009 250);   /* raised / hover */
  --bg-3: oklch(0.26 0.010 250);   /* input */

  /* Borders */
  --border-subtle: oklch(0.28 0.010 250 / 0.5);
  --border-soft: oklch(0.32 0.012 250 / 0.6);
  --border-strong: oklch(0.40 0.015 250 / 0.7);

  /* Text */
  --text-1: oklch(0.97 0.005 250);   /* primary */
  --text-2: oklch(0.78 0.012 250);   /* secondary */
  --text-3: oklch(0.62 0.012 250);   /* tertiary */
  --text-4: oklch(0.48 0.010 250);   /* quaternary / muted */

  /* Accent — emerald (per user choice) */
  --accent: oklch(0.74 0.16 152);
  --accent-strong: oklch(0.80 0.17 152);
  --accent-soft: oklch(0.74 0.16 152 / 0.14);
  --accent-fg: oklch(0.16 0.04 152);

  /* Semantic */
  --danger: oklch(0.68 0.18 27);
  --warn: oklch(0.78 0.15 75);
  --info: oklch(0.72 0.12 240);
  --success: oklch(0.74 0.16 152);

  /* Shadows */
  --shadow-sm: 0 1px 0 0 oklch(1 0 0 / 0.04) inset, 0 1px 2px oklch(0 0 0 / 0.4);
  --shadow-md: 0 1px 0 0 oklch(1 0 0 / 0.04) inset, 0 8px 24px oklch(0 0 0 / 0.4);
  --shadow-lg: 0 1px 0 0 oklch(1 0 0 / 0.05) inset, 0 24px 48px oklch(0 0 0 / 0.5);
  --shadow-glow: 0 0 40px oklch(0.74 0.16 152 / 0.18);

  /* Radii */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 20px;
  --r-2xl: 28px;

  /* Type */
  --font-sans: "Geist", "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: "Geist", "Inter", sans-serif;
  --font-mono: "Geist Mono", "JetBrains Mono", ui-monospace, monospace;
}

/* Base reset for surfaces inside artboards */
.nv-app {
  font-family: var(--font-sans);
  color: var(--text-1);
  background: var(--bg-0);
  font-feature-settings: "ss01", "ss02", "cv11";
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.nv-app * { box-sizing: border-box; }

/* Brand mark — abstract chevrons reinterpreted, monochromatic */
.nv-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-size: 16px;
}
.nv-logo-mark {
  width: 22px; height: 22px;
  display: grid; place-items: center;
}
.nv-logo-mark svg { width: 100%; height: 100%; }

/* Buttons */
.nv-btn {
  display: inline-flex; align-items: center; gap: 8px;
  height: 36px; padding: 0 14px;
  border-radius: var(--r-md);
  font: 500 13px/1 var(--font-sans);
  letter-spacing: -0.005em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 120ms ease;
  white-space: nowrap;
}
.nv-btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: 600;
  box-shadow: 0 1px 0 0 oklch(1 0 0 / 0.2) inset, 0 0 0 1px oklch(0.74 0.16 152 / 0.4), 0 8px 20px oklch(0.74 0.16 152 / 0.18);
}
.nv-btn-primary:hover { background: var(--accent-strong); }
.nv-btn-secondary {
  background: var(--bg-2);
  color: var(--text-1);
  border-color: var(--border-soft);
}
.nv-btn-secondary:hover { background: var(--bg-3); border-color: var(--border-strong); }
.nv-btn-ghost {
  background: transparent;
  color: var(--text-2);
}
.nv-btn-ghost:hover { background: var(--bg-2); color: var(--text-1); }

.nv-btn-sm { height: 30px; padding: 0 10px; font-size: 12px; border-radius: 8px; }
.nv-btn-lg { height: 44px; padding: 0 18px; font-size: 14px; }

/* Cards */
.nv-card {
  background: var(--bg-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  position: relative;
}
.nv-card-elev {
  background: linear-gradient(180deg, var(--bg-1), oklch(0.18 0.008 250));
  box-shadow: var(--shadow-md);
}

/* Inputs */
.nv-input {
  width: 100%;
  height: 40px;
  padding: 0 14px;
  background: var(--bg-3);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-md);
  color: var(--text-1);
  font: 400 14px/1 var(--font-sans);
  transition: all 120ms ease;
}
.nv-input::placeholder { color: var(--text-4); }
.nv-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  background: var(--bg-2);
}

.nv-label {
  font: 500 12px/1 var(--font-sans);
  color: var(--text-2);
  letter-spacing: 0;
  margin-bottom: 8px;
  display: block;
}

/* Chips / badges */
.nv-chip {
  display: inline-flex; align-items: center; gap: 6px;
  height: 22px; padding: 0 8px;
  border-radius: 999px;
  background: var(--bg-2);
  border: 1px solid var(--border-soft);
  color: var(--text-2);
  font: 500 11px/1 var(--font-sans);
  letter-spacing: 0.01em;
}
.nv-chip-accent {
  background: var(--accent-soft);
  border-color: oklch(0.74 0.16 152 / 0.3);
  color: var(--accent-strong);
}
.nv-chip-danger {
  background: oklch(0.68 0.18 27 / 0.14);
  border-color: oklch(0.68 0.18 27 / 0.3);
  color: oklch(0.78 0.16 27);
}
.nv-chip-warn {
  background: oklch(0.78 0.15 75 / 0.14);
  border-color: oklch(0.78 0.15 75 / 0.3);
  color: oklch(0.86 0.14 75);
}

/* Type */
.nv-display {
  font: 600 36px/1.05 var(--font-display);
  letter-spacing: -0.025em;
}
.nv-h1 { font: 600 24px/1.15 var(--font-display); letter-spacing: -0.02em; }
.nv-h2 { font: 600 18px/1.2 var(--font-display); letter-spacing: -0.015em; }
.nv-h3 { font: 600 14px/1.25 var(--font-display); letter-spacing: -0.005em; }
.nv-body { font: 400 14px/1.5 var(--font-sans); color: var(--text-2); }
.nv-small { font: 400 12px/1.4 var(--font-sans); color: var(--text-3); }
.nv-eyebrow {
  font: 500 11px/1 var(--font-sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
}
.nv-mono { font-family: var(--font-mono); font-feature-settings: "ss01"; }
.nv-num {
  font-family: var(--font-display);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

/* Sidebar */
.nv-side {
  background: var(--bg-0);
  border-right: 1px solid var(--border-subtle);
  display: flex; flex-direction: column;
}
.nv-side-item {
  display: flex; align-items: center; gap: 10px;
  height: 32px; padding: 0 10px;
  border-radius: 8px;
  color: var(--text-2);
  font: 500 13px/1 var(--font-sans);
  cursor: pointer;
  transition: all 120ms ease;
  border: 1px solid transparent;
}
.nv-side-item:hover { background: var(--bg-2); color: var(--text-1); }
.nv-side-item[data-active="true"] {
  background: var(--bg-2);
  color: var(--text-1);
  border-color: var(--border-soft);
  box-shadow: var(--shadow-sm);
}
.nv-side-item[data-active="true"] .nv-side-icon { color: var(--accent); }
.nv-side-icon { width: 16px; height: 16px; flex-shrink: 0; color: var(--text-3); }

/* Topbar */
.nv-topbar {
  height: 56px;
  border-bottom: 1px solid var(--border-subtle);
  background: oklch(0.16 0.008 250 / 0.7);
  backdrop-filter: blur(12px);
  display: flex; align-items: center;
  padding: 0 24px;
  gap: 12px;
}

/* Toast */
.nv-toast {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 14px 16px;
  background: var(--bg-2);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg);
  min-width: 320px;
  position: relative;
}
.nv-toast::before {
  content: "";
  position: absolute; left: 0; top: 16px; bottom: 16px;
  width: 2px;
  background: var(--accent);
  border-radius: 2px;
}

/* Subtle grain for premium feel */
.nv-grain::after {
  content: "";
  position: absolute; inset: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.04 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  opacity: 0.5;
  mix-blend-mode: overlay;
  border-radius: inherit;
}

/* Focus ring */
.nv-focus:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Divider */
.nv-divider { height: 1px; background: var(--border-subtle); width: 100%; }

/* Scrollbar (subtle) */
.nv-scroll::-webkit-scrollbar { width: 8px; height: 8px; }
.nv-scroll::-webkit-scrollbar-thumb { background: var(--border-soft); border-radius: 4px; }
.nv-scroll::-webkit-scrollbar-track { background: transparent; }