/* ============================================================
   1. VARIABILE ȘI DESIGN SYSTEM (PREMIUM LOOK)
   ============================================================ */
:root {
  /* Paletă Culori Profesionale Modernizate */
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-light: rgba(59, 130, 246, 0.1);
  --dark: #0f172a;
  --dark-accent: #1e293b;
  --sidebar-bg: #0f172a;
  --bg-main: #f1f5f9;
  --white: #ffffff;

  /* Culori Semantice */
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #0ea5e9;

  /* Regula de Aur: Culori Input */
  --inp-editable: #ffffff;
  --inp-readonly: #eff6ff;

  --border-color: #e2e8f0;
  --text-main: #1e293b;
  --text-muted: #64748b;

  /* Umbre Soft (Layered Shadows pentru profunzime) */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-premium: 0 20px 25px -5px rgba(0, 0, 0, 0.04), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
}

/* ============================================================
   2. RESETARE ȘI FUNDAMENT
   ============================================================ */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', "Segoe UI", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
}

/* ============================================================
   3. SIDEBAR PREMIUM (Legătură perfectă cu nav.js)
   ============================================================ */
#sidebar {
  width: 280px;
  height: 100vh;
  background: var(--sidebar-bg);
  color: #f8fafc;
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 2000;
  border-right: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 4px 0 25px rgba(0,0,0,0.15);
}

/* 3.1 Zona de Logo */
.sidebar-brand {
  padding: 30px 25px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  background: #0b1120;
}

.brand-logo {
  font-size: 1.6rem;
  filter: drop-shadow(0 0 8px rgba(59, 130, 246, 0.6));
}

.brand-text {
  font-weight: 900;
  font-size: 1.25rem;
  letter-spacing: 0.5px;
  color: white;
}

.brand-text span {
  color: var(--primary);
}

/* 3.2 Navigația și Link-urile */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 20px 15px;
}

.nav-category-title {
  font-size: 0.7rem;
  font-weight: 800;
  color: #64748b;
  margin: 25px 0 10px 15px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 12px 15px;
  text-decoration: none;
  color: #94a3b8;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 12px;
  margin-bottom: 6px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #f8fafc;
  transform: translateX(6px);
}

.nav-link.active {
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary);
  border: 1px solid rgba(59, 130, 246, 0.2);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.1);
}

/* 3.3 Zona de Deconectare */
.sidebar-footer {
  padding: 20px 15px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  background: #0b1120;
}

.logout-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--danger);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 12px 15px;
  border-radius: 12px;
  transition: all 0.2s;
}

.logout-btn:hover {
  background: rgba(239, 68, 68, 0.1);
  color: #f87171;
  transform: translateX(6px);
}

/* 3.4 Scrollbar personalizat pentru Sidebar */
.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.1); border-radius: 10px; }
.sidebar-nav::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.2); }

/* ============================================================
   4. STRUCTURĂ CONȚINUT PRINCIPAL
   ============================================================ */
.dashboard-body {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

#main-content {
  flex: 1;
  margin-left: 280px; /* Lasă loc perfect pentru sidebar */
  padding: 50px;
  overflow-y: auto;
  height: 100vh;
  background: radial-gradient(circle at top right, #ffffff, var(--bg-main));
}

/* ============================================================
   5. REGULA DE AUR: INPUTURI & FORM CARDURI
   ============================================================ */
.form-card {
  background: var(--white);
  padding: 40px;
  border-radius: 24px;
  box-shadow: var(--shadow-premium);
  margin-bottom: 35px;
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease;
}

.form-card:hover {
  border-color: #cbd5e1;
}

/* Câmpuri Editabile (Albe) */
input[type="number"]:not([readonly]),
input[type="text"]:not([readonly]) {
  background-color: var(--inp-editable) !important;
  border: 2px solid #e2e8f0;
  padding: 12px 18px;
  border-radius: 12px;
  font-weight: 700;
  color: var(--text-main);
  text-align: right;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  width: 100%;
  font-size: 1rem;
}

input:not([readonly]):focus {
  border-color: var(--primary);
  outline: none;
  background-color: #fff !important;
  box-shadow: 0 0 0 4px var(--primary-light);
  transform: translateY(-1px);
}

/* Câmpuri Calculate (Albastru deschis) */
input[readonly] {
  background-color: var(--inp-readonly) !important;
  border: 2px solid #bfdbfe;
  color: var(--primary);
  font-weight: 800;
  padding: 12px 18px;
  border-radius: 12px;
  text-align: right;
  cursor: not-allowed;
  font-size: 1rem;
}

/* ============================================================
   6. KPI CARDS & EFECTE VIZUALE
   ============================================================ */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
  margin-bottom: 40px;
}

.kpi-card {
  background: var(--white);
  padding: 25px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.kpi-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.kpi-card h4 {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 10px;
}

.kpi-card .val {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--text-main);
}

/* Badge-uri de Status */
.status-badge {
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.good { background: #dcfce7; color: #15803d; }
.warn { background: #fef3c7; color: #b45309; }
.danger { background: #fee2e2; color: #b91c1c; }

/* ============================================================
   7. BUTOANE PREMIUM
   ============================================================ */
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
  color: var(--white);
  padding: 14px 30px;
  border: none;
  border-radius: 14px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.3);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 25px -5px rgba(59, 130, 246, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

/* ============================================================
   8. UTILS & MICRO-ANIMATIONS
   ============================================================ */
.glass {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

#main-content > * {
  animation: fadeIn 0.5s ease-out forwards;
}

.text-gradient {
  background: linear-gradient(to right, var(--primary), #60a5fa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 900;
}