/* ==========================================================================
   TrinAI UI Design System — SiteBoS Telegram MiniApp Theme
   Source of Truth: docs/UI-DESIGN-SYSTEM.md (Baseline: /corsi)
   Estetica: Industrial Minimal B2B | Tipografia: Inter Anti-Blur
   ========================================================================== */

/* 1. TIPOGRAFIA & ANTI-BLUR RENDERING */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  /* 2. NEUTRAL & SLATE TOKENS */
  --surface-bg: #f8fafc;        /* Slate 50 - Canvas canvas principale */
  --surface-card: #ffffff;      /* Pure White - Superficie card */
  --surface-subtle: #f1f5f9;    /* Slate 100 - Pillole, header tabelle, box neutri */
  
  --border-subtle: #e2e8f0;     /* Slate 200 - Bordi standard card e divisori */
  --border-strong: #cbd5e1;     /* Slate 300 - Bordi input e pulsanti secondari */
  
  --text-primary: #0f172a;      /* Slate 900 - Titoli, label attive, enfasi */
  --text-secondary: #475569;    /* Slate 600 - Testo corpo e descrizioni */
  --text-muted: #64748b;        /* Slate 500 - Timestamp, icone neutre, placeholder */
  
  --brand-dark: #0f172a;        /* Slate 900 - Pulsante primario e accenti guida */
  --brand-hover: #1e293b;       /* Slate 800 - Hover / stato attivo primario */

  /* 3. ACCENTI SEMANTICI CONTROLLATI */
  --amber-bg: #fef3c7;          /* Amber 100 - Alert, scadenze, badge in attesa */
  --amber-border: #fde68a;      /* Amber 200 */
  --amber-text: #b45309;        /* Amber 700 */

  --emerald-bg: #dcfce7;        /* Emerald 100 - Successo, conferme, offerte */
  --emerald-border: #bbf7d0;    /* Emerald 200 */
  --emerald-text: #15803d;      /* Emerald 700 */

  --danger-bg: #fee2e2;         /* Red 100 - Errori e cancellazioni */
  --danger-border: #ef4444;     /* Red 500 */
  --danger-text: #b91c1c;       /* Red 700 */

  /* 4. RAGGI DI CURVATURA & TRANSIZIONI */
  --radius-sm: 6px;
  --radius-md: 8px;             /* Input e pulsanti compatti */
  --radius-lg: 12px;            /* Card standard mobile */
  --radius-xl: 14px;
  --radius-pill: 9999px;

  --trans-fast: 120ms cubic-bezier(0.4, 0, 0.2, 1);
  --trans-base: 180ms cubic-bezier(0.4, 0, 0.2, 1);

  /* 5. OMBRE CHIARE E NITIDE (NO DIFFUSE / NO GLOW) */
  --shadow-card: 0 1px 3px 0 rgba(15, 23, 42, 0.05), 0 1px 2px -1px rgba(15, 23, 42, 0.05);
  --shadow-elevated: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
}

/* Base Body Anti-Blur Directive */
body, button, input, select, textarea {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif !important;
  -webkit-font-smoothing: antialiased !important;
  -moz-osx-font-smoothing: grayscale !important;
  text-rendering: optimizeLegibility !important;
  font-synthesis: none !important;
  font-feature-settings: "cv02", "cv03", "cv04", "cv11" !important;
}

/* ==========================================================================
   COMPONENTI MODULARI TWA (Mobile-Optimized)
   ========================================================================== */

/* Canvas Base */
.twa-canvas {
  background-color: var(--surface-bg) !important;
  color: var(--text-primary) !important;
  min-height: 100vh;
  min-height: 100dvh;
}

/* Card TrinAI Standard */
.twa-card {
  background-color: var(--surface-card) !important;
  border: 1px solid var(--border-subtle) !important;
  border-radius: var(--radius-lg) !important;
  box-shadow: var(--shadow-card) !important;
  transition: transform var(--trans-base), box-shadow var(--trans-base), border-color var(--trans-base);
}

.twa-card-interactive:active {
  transform: scale(0.99);
  border-color: var(--border-strong) !important;
}

/* Pulsante Primario TrinAI (Slate 900) */
.twa-btn-primary {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 8px !important;
  height: 48px !important;
  padding: 0 20px !important;
  background-color: var(--brand-dark) !important;
  color: #ffffff !important;
  font-size: 14px !important;
  font-weight: 600 !important;
  border-radius: var(--radius-md) !important;
  border: 1px solid transparent !important;
  cursor: pointer !important;
  user-select: none !important;
  -webkit-tap-highlight-color: transparent;
  transition: background-color var(--trans-fast), transform var(--trans-fast), opacity var(--trans-fast);
}

.twa-btn-primary:active {
  background-color: var(--brand-hover) !important;
  transform: scale(0.98) !important;
}

.twa-btn-primary:disabled {
  background-color: var(--surface-subtle) !important;
  color: var(--text-muted) !important;
  cursor: not-allowed !important;
  transform: none !important;
}

/* Pulsante Secondario / Outline */
.twa-btn-secondary {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 8px !important;
  height: 48px !important;
  padding: 0 20px !important;
  background-color: var(--surface-card) !important;
  color: var(--text-primary) !important;
  font-size: 14px !important;
  font-weight: 600 !important;
  border-radius: var(--radius-md) !important;
  border: 1px solid var(--border-strong) !important;
  cursor: pointer !important;
  user-select: none !important;
  -webkit-tap-highlight-color: transparent;
  transition: background-color var(--trans-fast), transform var(--trans-fast), border-color var(--trans-fast);
}

.twa-btn-secondary:active {
  background-color: var(--surface-bg) !important;
  transform: scale(0.98) !important;
}

/* Input & Select */
.twa-input {
  width: 100% !important;
  height: 44px !important;
  padding: 0 14px !important;
  background-color: var(--surface-card) !important;
  border: 1px solid var(--border-strong) !important;
  border-radius: var(--radius-md) !important;
  color: var(--text-primary) !important;
  font-size: 14px !important;
  font-weight: 400 !important;
  outline: none !important;
  transition: border-color var(--trans-fast), box-shadow var(--trans-fast);
}

.twa-input:focus {
  border-color: var(--brand-dark) !important;
  box-shadow: 0 0 0 1px var(--brand-dark) !important;
}

.twa-input::placeholder {
  color: var(--text-muted) !important;
}

/* Label TrinAI Standard */
.twa-label {
  display: block;
  font-size: 11px !important;
  font-weight: 700 !important;
  text-transform: uppercase !important;
  letter-spacing: 0.05em !important;
  color: var(--text-secondary) !important;
  margin-bottom: 6px !important;
}

/* Badges e Pillole */
.twa-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-pill);
  line-height: 1.2;
}

.twa-badge-neutral {
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.twa-badge-amber {
  background-color: var(--amber-bg);
  border: 1px solid var(--amber-border);
  color: var(--amber-text);
}

.twa-badge-emerald {
  background-color: var(--emerald-bg);
  border: 1px solid var(--emerald-border);
  color: var(--emerald-text);
}

/* Bottom Action Bar Mobile (Fixed & Safe-Area Aware) */
.twa-bottom-bar {
  position: fixed !important;
  bottom: 0 !important;
  left: 0 !important;
  right: 0 !important;
  z-index: 50 !important;
  padding: 12px 16px !important;
  padding-bottom: max(12px, env(safe-area-inset-bottom)) !important;
  background-color: rgba(255, 255, 255, 0.96) !important;
  backdrop-filter: blur(12px) !important;
  -webkit-backdrop-filter: blur(12px) !important;
  border-top: 1px solid var(--border-subtle) !important;
  display: flex !important;
  gap: 10px !important;
}

/* Spinner di Caricamento TrinAI */
.twa-spinner {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2.5px solid var(--border-subtle);
  border-top-color: var(--brand-dark);
  animation: twaSpin 0.75s linear infinite;
}

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

/* Pulsante Rotondo di Chiusura / Uscita (Header) */
.twa-exit-btn {
  width: 40px !important;
  height: 40px !important;
  border-radius: 50% !important;
  background-color: #ffffff !important;
  border: 1px solid var(--border-subtle) !important;
  color: var(--text-primary) !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  box-shadow: var(--shadow-card) !important;
  cursor: pointer !important;
  transition: transform var(--trans-fast), background-color var(--trans-fast);
}

.twa-exit-btn:active {
  transform: scale(0.95);
  background-color: var(--surface-bg) !important;
}