/* HAIRMANO — Design System v2
   White base + Electric Violet + Acid Lime, now with life
*/

:root {
  /* Surfaces */
  --color-bg: #FFFFFF;
  --color-surface: #FAFAFA;
  --color-surface-hover: #F4F4F5;

  /* Ink */
  --color-ink: #0A0A0A;
  --color-ink-muted: #52525B;
  --color-grey: #A1A1AA;
  --color-border: #E4E4E7;

  /* Accents */
  --color-primary: #6B4EFF;
  --color-primary-hover: #5A3FE0;
  --color-primary-soft: #EEEBFF;
  --color-primary-deep: #4B2FD9;

  --color-accent: #D4FF3F;
  --color-accent-hover: #C2EE2E;
  --color-accent-soft: #F5FFD9;

  /* Semantic */
  --color-danger: #EF4444;
  --color-warning: #F59E0B;
  --color-success: #10B981;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #7B5EFF 0%, #5A3FE0 100%);
  --gradient-primary-hover: linear-gradient(135deg, #8A6EFF 0%, #6B4EFF 100%);
  --gradient-accent: linear-gradient(135deg, #DFFF55 0%, #B8E800 100%);
  --gradient-ink: linear-gradient(135deg, #1A1A1A 0%, #0A0A0A 100%);
  --gradient-electric: linear-gradient(135deg, #6B4EFF 0%, #D4FF3F 100%);
  --gradient-mesh-1: radial-gradient(circle at 20% 30%, rgba(107, 78, 255, 0.08), transparent 50%);
  --gradient-mesh-2: radial-gradient(circle at 80% 70%, rgba(212, 255, 63, 0.10), transparent 50%);
  --gradient-mesh-3: radial-gradient(circle at 50% 100%, rgba(107, 78, 255, 0.06), transparent 60%);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(10, 10, 10, 0.04);
  --shadow-md: 0 4px 12px rgba(10, 10, 10, 0.06);
  --shadow-lg: 0 16px 40px rgba(10, 10, 10, 0.08);
  --shadow-violet: 0 12px 32px rgba(107, 78, 255, 0.25);
  --shadow-violet-sm: 0 4px 12px rgba(107, 78, 255, 0.18);
  --shadow-lime: 0 12px 32px rgba(212, 255, 63, 0.35);
  --shadow-focus: 0 0 0 3px rgba(107, 78, 255, 0.2);
  --shadow-focus-lime: 0 0 0 3px rgba(212, 255, 63, 0.45);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;

  /* Type */
  --font-display: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-snap: cubic-bezier(0.34, 1.56, 0.64, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- Animated mesh background ---------- */
body {
  background: var(--color-bg);
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: -20%;
  background:
    var(--gradient-mesh-1),
    var(--gradient-mesh-2),
    var(--gradient-mesh-3);
  animation: mesh-drift 24s ease-in-out infinite;
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'><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 0.03 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
  mix-blend-mode: multiply;
}

@keyframes mesh-drift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(3%, -2%) scale(1.05); }
  66% { transform: translate(-2%, 3%) scale(0.98); }
}

body > * { position: relative; z-index: 1; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--color-ink);
}

h1 { font-size: 32px; line-height: 1.2; }
h2 { font-size: 24px; line-height: 1.25; }
h3 { font-size: 18px; line-height: 1.3; }

a { color: var(--color-primary); text-decoration: none; transition: color 180ms var(--ease-out); }
a:hover { color: var(--color-primary-hover); }

button, input, select, textarea { font: inherit; color: inherit; }

.tabular { font-variant-numeric: tabular-nums; }

/* ---------- Logo ---------- */
.logo {
  display: inline-flex;
  align-items: center;
  background: var(--gradient-ink);
  color: var(--color-bg);
  font-family: 'Impact', 'Arial Black', sans-serif;
  font-size: 18px;
  letter-spacing: 0.08em;
  padding: 6px 14px;
  border-radius: 4px;
  user-select: none;
  position: relative;
  overflow: hidden;
  transition: transform 240ms var(--ease-out);
}

.logo::after {
  content: '';
  position: absolute;
  top: 0;
  left: -60%;
  width: 40%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(212, 255, 63, 0.4), transparent);
  transform: skewX(-20deg);
  transition: left 600ms var(--ease-out);
}

.logo:hover::after { left: 120%; }
.logo:hover { transform: translateY(-1px); }

.logo-lg {
  font-size: 28px;
  padding: 12px 24px;
  letter-spacing: 0.1em;
}

/* ---------- Layout shells ---------- */
.center-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: screen-in 500ms var(--ease-out);
}

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

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
  position: relative;
}

.card-sm { padding: 20px; }

.stack > * + * { margin-top: 16px; }
.stack-sm > * + * { margin-top: 8px; }
.stack-lg > * + * { margin-top: 24px; }

.row { display: flex; gap: 12px; align-items: center; }
.row-between { display: flex; justify-content: space-between; align-items: center; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 120ms var(--ease-out), box-shadow 200ms var(--ease-out), background 180ms var(--ease-out);
  user-select: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transform: translateX(-100%);
  transition: transform 500ms var(--ease-out);
}

.btn:hover::before { transform: translateX(100%); }

.btn:active { transform: scale(0.97); }
.btn:focus-visible { outline: none; box-shadow: var(--shadow-focus); }

.btn-primary {
  background: var(--gradient-primary);
  color: #FFFFFF;
  box-shadow: var(--shadow-violet-sm);
}
.btn-primary:hover {
  background: var(--gradient-primary-hover);
  color: #FFFFFF;
  box-shadow: var(--shadow-violet);
  transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0) scale(0.98); }

.btn-secondary {
  background: var(--color-bg);
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-secondary:hover { background: var(--color-primary-soft); }

.btn-confirm {
  background: var(--gradient-accent);
  color: var(--color-ink);
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(212, 255, 63, 0.25);
}
.btn-confirm:hover {
  box-shadow: var(--shadow-lime);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-border);
  backdrop-filter: blur(4px);
}
.btn-ghost:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-ink-muted);
}

.btn-danger { background: var(--color-danger); color: #FFFFFF; }

.btn-block { width: 100%; }
.btn-lg { padding: 14px 24px; font-size: 15px; }

/* ---------- Inputs ---------- */
.input {
  width: 100%;
  padding: 12px 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--color-ink);
  transition: border-color 180ms var(--ease-out), box-shadow 180ms var(--ease-out), transform 120ms var(--ease-out);
}

.input:hover { border-color: var(--color-ink-muted); }
.input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}

.input::placeholder { color: var(--color-grey); }

.label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-ink-muted);
  margin-bottom: 6px;
  letter-spacing: 0.01em;
}

/* ---------- Top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border-bottom: 1px solid var(--color-border);
}

.topbar-left, .topbar-right { display: flex; align-items: center; gap: 16px; }

.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 14px;
  color: var(--color-ink-muted);
  transition: background 180ms var(--ease-out), color 180ms var(--ease-out);
  position: relative;
}

.nav-link:hover { background: var(--color-surface-hover); color: var(--color-ink); }
.nav-link.active {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

/* ---------- User picker grid ---------- */
.user-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  width: 100%;
  max-width: 1100px;
}

@media (max-width: 900px) {
  .user-grid { grid-template-columns: 1fr; max-width: 420px; }
}

.user-tile {
  padding: 48px 36px 44px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  text-align: center;
  cursor: pointer;
  transition: all 240ms var(--ease-out);
  position: relative;
  overflow: hidden;
  animation: tile-in 500ms var(--ease-out) backwards;
}

.user-tile:nth-child(1) { animation-delay: 0ms; }
.user-tile:nth-child(2) { animation-delay: 80ms; }
.user-tile:nth-child(3) { animation-delay: 160ms; }

@keyframes tile-in {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.user-tile::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: var(--radius-xl);
  padding: 2px;
  background: var(--gradient-electric);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: 0;
  transition: opacity 260ms var(--ease-out);
  pointer-events: none;
}

.user-tile > * { position: relative; z-index: 1; }

.user-tile:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-violet);
  border-color: transparent;
}

.user-tile:hover::after { opacity: 1; }

.user-tile:active { transform: translateY(-2px) scale(0.99); }

.user-avatar {
  width: 65%;
  aspect-ratio: 1 / 1;
  margin: 0 auto 36px;
  background: var(--gradient-ink);
  color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 92px;
  font-weight: 700;
  border-radius: var(--radius-lg);
  transition: transform 300ms var(--ease-snap), box-shadow 260ms var(--ease-out);
  position: relative;
  overflow: hidden;
}

.user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.user-tile.admin .user-avatar {
  background: var(--gradient-primary);
  box-shadow: var(--shadow-violet-sm);
}

.user-tile:hover .user-avatar {
  transform: scale(1.08) rotate(-3deg);
  box-shadow: var(--shadow-violet);
}

.user-tile.admin:hover .user-avatar {
  box-shadow: var(--shadow-violet);
}

.user-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 26px;
  margin-bottom: 8px;
  letter-spacing: -0.015em;
}

.user-role {
  font-size: 12px;
  color: var(--color-ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
}

.user-tile.admin .user-role {
  color: var(--color-primary);
}

/* ---------- PIN pad ---------- */
.pin-display {
  display: flex;
  gap: 14px;
  justify-content: center;
  margin: 24px 0 28px;
}

.pin-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  transition: all 180ms var(--ease-snap);
}

.pin-dot.filled {
  background: var(--gradient-primary);
  border-color: transparent;
  transform: scale(1.15);
  box-shadow: var(--shadow-violet-sm);
}

.pin-dot.error {
  border-color: var(--color-danger);
  background: var(--color-danger);
  animation: shake 0.4s;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

.pin-pad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  max-width: 280px;
  margin: 0 auto;
}

.pin-key {
  aspect-ratio: 1 / 1;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 500;
  cursor: pointer;
  transition: all 140ms var(--ease-out);
  user-select: none;
  position: relative;
  overflow: hidden;
}

.pin-key:hover {
  background: var(--color-bg);
  border-color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-violet-sm);
}

.pin-key:active {
  background: var(--gradient-primary);
  color: #FFFFFF;
  border-color: transparent;
  transform: scale(0.94);
}

.pin-key.utility {
  background: transparent;
  border-color: transparent;
  font-size: 14px;
  color: var(--color-ink-muted);
  box-shadow: none;
}

.pin-key.utility:hover {
  background: var(--color-surface-hover);
  color: var(--color-ink);
  border-color: transparent;
}

.pin-key.utility:active {
  background: var(--color-ink);
  color: var(--color-bg);
}

/* ---------- Flash messages ---------- */
.flash {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  margin-bottom: 16px;
  animation: flash-in 400ms var(--ease-out);
}

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

.flash-error {
  background: #FEF2F2;
  color: var(--color-danger);
  border: 1px solid #FECACA;
}

.flash-success {
  background: var(--color-accent-soft);
  color: var(--color-ink);
  border: 1px solid var(--color-accent);
}

/* ---------- Utility ---------- */
.text-muted { color: var(--color-ink-muted); }
.text-grey { color: var(--color-grey); }
.text-center { text-align: center; }
.text-sm { font-size: 13px; }
.text-lg { font-size: 17px; }
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
          background-clip: text;
  color: transparent;
}

.mt-sm { margin-top: 8px; }
.mt-md { margin-top: 16px; }
.mt-lg { margin-top: 24px; }

.pill {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  color: var(--color-ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: all 200ms var(--ease-out);
}

.pill-accent {
  background: var(--gradient-accent);
  border-color: transparent;
  color: var(--color-ink);
  box-shadow: 0 2px 8px rgba(212, 255, 63, 0.3);
}

.pill-primary {
  background: var(--color-primary-soft);
  border-color: rgba(107, 78, 255, 0.2);
  color: var(--color-primary);
}

/* ---------- Placeholder screens ---------- */
.placeholder-card {
  max-width: 480px;
  text-align: center;
  animation: screen-in 500ms var(--ease-out);
  overflow: hidden;
}

.placeholder-card::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 20%;
  right: 20%;
  height: 2px;
  background: var(--gradient-electric);
  border-radius: 2px;
  opacity: 0.6;
}

.placeholder-card h1 {
  margin-bottom: 8px;
}

.placeholder-card .subtitle {
  color: var(--color-ink-muted);
  margin-bottom: 20px;
  font-size: 15px;
}

.placeholder-card .message {
  color: var(--color-grey);
  font-size: 14px;
  line-height: 1.6;
}

/* ---------- Modal backdrop ---------- */
#pin-modal .user-avatar {
  width: 72px;
  aspect-ratio: 1 / 1;
  margin: 0 auto 12px;
  font-size: 28px;
  border-radius: 50%;
}

#pin-modal {
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: backdrop-in 220ms var(--ease-out);
}

@keyframes backdrop-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

#pin-modal .card {
  animation: modal-in 300ms var(--ease-snap);
  box-shadow: var(--shadow-lg);
}

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.94) translateY(8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}