/* ==========================================================================
   BudgetWise — main.css
   Reset, base styles, CSS custom properties, app layout, sidebar, responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
  /* Brand colors */
  --color-primary:        #4F46E5;
  --color-primary-dark:   #3730A3;
  --color-primary-light:  #EEF2FF;
  --color-success:        #10B981;
  --color-danger:         #EF4444;
  --color-warning:        #F59E0B;
  --color-info:           #3B82F6;

  /* Gray scale */
  --color-gray-50:        #F9FAFB;
  --color-gray-100:       #F3F4F6;
  --color-gray-200:       #E5E7EB;
  --color-gray-300:       #D1D5DB;
  --color-gray-400:       #9CA3AF;
  --color-gray-500:       #6B7280;
  --color-gray-600:       #4B5563;
  --color-gray-700:       #374151;
  --color-gray-800:       #1F2937;
  --color-gray-900:       #111827;

  /* Layout */
  --sidebar-width:        240px;
  --header-height:        64px;
  --border-radius:        8px;
  --border-radius-input:  6px;
  --border-radius-badge:  4px;

  /* Shadows */
  --shadow-sm:            0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md:            0 4px 6px rgba(0, 0, 0, 0.07);

  /* Transitions */
  --transition:           0.15s ease;
}

/* --------------------------------------------------------------------------
   Reset & Base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--color-gray-50);
  color: var(--color-gray-800);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg {
  display: block;
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
}

ul,
ol {
  list-style: none;
}

/* --------------------------------------------------------------------------
   App Layout
   -------------------------------------------------------------------------- */
.app-wrapper {
  display: flex;
  min-height: 100vh;
}

/* --------------------------------------------------------------------------
   Sidebar
   -------------------------------------------------------------------------- */
.sidebar {
  width: var(--sidebar-width);
  background: #fff;
  border-right: 1px solid var(--color-gray-200);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
}

/* Sidebar — brand */
.sidebar-brand {
  padding: 20px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--color-gray-200);
  flex-shrink: 0;
}

.brand-logo {
  font-size: 24px;
  line-height: 1;
}

.brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
}

/* Sidebar — month navigator */
.month-nav {
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-primary-light);
  border-bottom: 1px solid var(--color-gray-200);
  flex-shrink: 0;
}

.month-nav-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.month-nav-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-primary);
  padding: 4px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  transition: background var(--transition);
}

.month-nav-btn:hover {
  background: rgba(79, 70, 229, 0.1);
}

/* Sidebar — navigation */
.sidebar-nav {
  padding: 12px 8px;
  flex: 1;
}

.sidebar-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 6px;
  color: var(--color-gray-600);
  font-size: 14px;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}

.nav-item a:hover {
  background: var(--color-gray-100);
  color: var(--color-gray-900);
}

.nav-item.active a {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 600;
}

.nav-item a svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Sidebar — baby steps */
.baby-steps-nav {
  padding: 12px 16px;
  border-top: 1px solid var(--color-gray-200);
  flex-shrink: 0;
}

.baby-steps-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-400);
  margin-bottom: 8px;
}

.baby-steps-dots {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.baby-step-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-gray-200);
  border: 2px solid transparent;
  font-size: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-400);
  font-weight: 700;
  line-height: 1;
  cursor: default;
  user-select: none;
}

.baby-step-dot--done {
  background: var(--color-success);
  color: #fff;
  border-color: var(--color-success);
}

.baby-step-dot--active {
  background: #fff;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Sidebar — user area */
.sidebar-user {
  padding: 16px;
  border-top: 1px solid var(--color-gray-200);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.sidebar-user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}

.sidebar-user-info {
  flex: 1;
  min-width: 0;
}

.sidebar-user-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-gray-800);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-links {
  display: flex;
  gap: 8px;
  font-size: 12px;
  color: var(--color-gray-400);
  margin-top: 2px;
}

.sidebar-user-links a {
  transition: color var(--transition);
}

.sidebar-user-links a:hover {
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Main Layout
   -------------------------------------------------------------------------- */
.main-layout {
  display: flex;
  flex: 1;
  margin-left: var(--sidebar-width);
  min-width: 0;
}

.main-content {
  flex: 1;
  padding: 24px;
  max-width: 1200px;
  min-width: 0;
}

/* --------------------------------------------------------------------------
   Page Header
   -------------------------------------------------------------------------- */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  gap: 12px;
  flex-wrap: wrap;
}

.page-header h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-gray-900);
}

/* --------------------------------------------------------------------------
   Mobile Bottom Nav (hidden on desktop)
   -------------------------------------------------------------------------- */
.mobile-nav {
  display: none;
}

/* --------------------------------------------------------------------------
   Scrollbar (webkit)
   -------------------------------------------------------------------------- */
.sidebar::-webkit-scrollbar {
  width: 4px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--color-gray-200);
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   Responsive — Tablet / Mobile (max-width: 768px)
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }

  .sidebar.sidebar--open {
    transform: translateX(0);
  }

  /* Overlay when sidebar is open on mobile */
  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 99;
  }

  .sidebar-overlay--visible {
    display: block;
  }

  .main-layout {
    margin-left: 0;
  }

  .main-content {
    padding: 16px;
    padding-bottom: 80px;
  }

  .page-header h1 {
    font-size: 20px;
  }

  /* Mobile bottom navigation */
  .mobile-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #fff;
    border-top: 1px solid var(--color-gray-200);
    z-index: 100;
  }

  .mobile-nav a {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 10px 8px;
    font-size: 10px;
    color: var(--color-gray-500);
    text-decoration: none;
    transition: color var(--transition);
  }

  .mobile-nav a.active {
    color: var(--color-primary);
  }

  .mobile-nav svg {
    width: 20px;
    height: 20px;
  }
}