@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box; 
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
    line-height: 120%;
    letter-spacing: -.02em;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: hidden;
}


img, picture, svg, video {
  display: block;
  max-width: 100%;
}

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

ul, ol {
  list-style: none; 
}

a {
  text-decoration: none;
  color: inherit;
  display: flex;
  align-items: center;
  gap: var(--space-12);

}

.sidebar-nav ul li{
  padding: var(--space-16);
}

.sidebar-nav ul li:hover, .sidebar-nav ul li:focus, .sidebar-nav ul li:active {
  background-color: var(--sidebar-hover);
  border-radius: var(--radius-md);
  cursor: pointer;
}


:root {
  --bg-main: #f8fafc;
  --sidebar-bg: #1e293b;
  --sidebar-hover: #334155;
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --border-light: #e2e8f0;
  --white: #ffffff;

  --paid: #22c55e;
  --paid-bg: rgba(34, 197, 94, 0.1);
  
  --pending: #f59e0b;
  --pending-bg: rgba(245, 158, 11, 0.1);
  
  --overdue: #ef4444;
  --overdue-bg: rgba(239, 68, 68, 0.1);

 
  --space-4: 0.25rem;
  --space-8: 0.5rem;
  --space-12: 0.75rem;
  --space-16: 1rem;
  --space-20: 1.25rem;
  --space-24: 1.5rem;
  --space-32: 2rem;
  --space-40: 2.5rem;
  --space-48: 3rem;
  --space-64: 4rem;
  --space-80: 5rem;
  --space-90: 5.625rem;


  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --sidebar-width: 260px;

  --weight-reg: 400;
  --weight-med: 500;
  --weight-semi: 600;
  --weight-bold: 700;

 
  --text-xs: 0.75rem;  
  --text-sm: 0.875rem;
  --text-base: 1rem;    
  --text-lg: 1.125rem; 
  --text-xl: 1.25rem;  
  --text-2xl: 1.5rem;  
}


.app-wrapper {
  display: grid;
  min-height: 100vh;
  grid-template-columns: 1fr; 
}

.mobile-toggle {
    display: flex; 
    background: var(--sidebar-bg); 
    color: white;
    border: none;
    font-size: var(--text-2xl);
    cursor: pointer;
    padding: var(--space-4);
    border-radius: var(--space-4);
    line-height: 1;
    transition: all 0.3s ease;
}


.sidebar {
  background-color: var(--sidebar-bg);
  color: var(--white);
  padding: var(--space-24) var(--space-24);
  display: none;
  height: 100vh;
 transform: translateX(0); 
  visibility: visible;
  box-shadow: 6px 0 8px rgba(0,0,0,0.3);
  
}

.search-container {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8); 
    gap: var(--space-8);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    background-color: var(--bg-main);
    color: var(--text-primary);
}

#search-icon {
    left: var(--space-12);
    color: var(--text-primary);
    font-size: var(--text-lg);
    pointer-events: none;
}

.search-box { 
    border: none;
    border-radius: var(--radius-md);
    background-color: inherit;
    line-height: 120%;
    color: var(--text-primary);
    font-size: var(--text-base);
    width: 8rem;
    padding: var(--space-8);
    transition: border-color 0.2s ease;
}

.search-box:focus {
    outline: none;
    border-color: var(--sidebar-bg);
}

@media (min-width: 1024px) {

  .search-container {
        display: flex;
        align-items: center;
    }

  .app-wrapper {
    grid-template-columns: var(--sidebar-width) 1fr; 
  }

  .sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-40);
    position: sticky;
    top: 0;
    height: 100vh;
    transform: translateX(0);
    visibility: visible;
    transition: transform 0.3s ease-in-out, visibility 0.3s;
  }

  .mobile-toggle {
        display: none !important; 
    }
}

@media (max-width: 1023px) {
    .sidebar {
        display: flex;
        flex-direction: column;
        gap: var(--space-48);
        position: fixed;
        z-index: 9999;
        top: 0;
        left: 0;
        width: 260px; 
        height: 100vh;
        transform: translateX(-100%); 
        visibility: hidden;
        transition: transform 0.3s ease-in-out, visibility 0.3s;
        box-shadow: none;
    }

    .sidebar.active {
        transform: translateX(0); 
        visibility: visible;
        box-shadow: 10px 0 30px rgba(0,0,0,0.3);
    }

    .search-box{
      width: 6rem;
    }
}

.logo {
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  letter-spacing: -1px;
  padding: 0 var(--space-16);
  cursor: pointer;
}

.main-wrapper {
  background-color: var(--bg-main);
  display: flex;
  flex-direction: column;
}

.top-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-24) var(--space-32);
  background-color: var(--white);
  border-bottom: 1px solid var(--border-light);
}

.header-left{
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--space-12);
}

.section-title {
    font-size: var(--text-lg);
    font-weight: var(--weight-semi);
    margin: 0;
}


.content-area {
  padding: var(--space-32);
}


.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-24);
  margin-bottom: var(--space-40);
}

.stat-card {
  background: var(--white);
  padding: var(--space-24);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.stat-card h3 {
  font-size: var(--text-xl);
  margin-top: var(--space-8);
}

/* Invoice list and cards */
.invoice-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-24);
    margin-bottom: var(--space-40);
}

.invoice-card {
    background: rgba(122, 135, 155, 0.05);
    padding: var(--space-24);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s ease-in-out;
    border: 1px solid var(--border-light);
}

.invoice-card:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.10);

}

.invoice-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-12);
}

.invoice-header h4 {
    font-size: var(--text-lg);
    font-weight: var(--weight-semi);
    margin: 0;
}

.status-badge {
    padding: var(--space-4) var(--space-12);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: var(--weight-med);
    text-transform: uppercase;
}

.status-badge.paid {
    background-color: var(--paid-bg);
    color: var(--paid);
}

.status-badge.pending {
    background-color: var(--pending-bg);
    color: var(--pending);
}

.status-badge.overdue {
    background-color: var(--overdue-bg);
    color: var(--overdue);
}

.preview-btn {
    background-color: var(--sidebar-bg);
    color: var(--white);
    border: none;
    padding: var(--space-8) var(--space-16);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--text-sm);
    margin-top: var(--space-12);
    transition: background-color 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
}

.preview-btn:hover {
    background-color: var(--sidebar-hover);
}

.preview-btn:active {
    outline: none;
    box-shadow: 0 0 0 3px rgba(100, 116, 139, 0.5);
}

.invoice-preview {
    display: none;
    margin-top: var(--space-12);
    padding: var(--space-12);
    background-color: var(--bg-main);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
}

.invoice-preview.show {
    display: block;
}


.modal {
    display: flex; 
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    justify-content: center; 
    align-items: center; 
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s;
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--white);
    padding: var(--space-32);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    max-width: 500px;
    width: 90%;
    position: relative;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal.show .modal-content {
    transform: scale(1);
}

.close-btn {
    position: absolute;
    top: var(--space-12);
    right: var(--space-12);
    font-size: var(--text-2xl);
    cursor: pointer;
    color: var(--text-secondary);
}

.close-btn:hover {
    color: var(--text-primary);
}

.nav-link.active {
    background-color: var(--sidebar-hover);
    border-radius: var(--radius-md);
   
}