@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:wght@700&family=Noto+Serif+Devanagari:wght@400;700&family=Poppins:wght@300;400;500;600&display=swap');

:root {
  --primary:    #4f46e5;     /* indigo-600 */
  --primary-soft: #6366f1;
  --accent:     #f59e0b;     /* amber-500 – warm gold */
  --success:    #10b981;
  --danger:     #ef4444;
  --bg:         #f8fafc;
  --surface:    #ffffff;
  --surface-2:  #f1f5f9;
  --text:       #0f172a;
  --text-muted: #64748b;
  --border:     #e2e8f0;
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08);
  --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);
  --radius-md:  12px;
  --radius-lg:  16px;
  --sidebar-width: 260px;
}

.dark {
  --bg:         #0f172a;
  --surface:    #1e293b;
  --surface-2:  #334155;
  --text:       #f8fafc;
  --text-muted: #94a3b8;
  --border:     #334155;
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.3);
  --shadow-md:  0 4px 6px -1px rgba(0,0,0,0.4);
}

* { box-sizing: border-box; }

body { 
    font-family: 'Inter', 'Poppins', sans-serif; 
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 0;
    line-height: 1.5;
}

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

.sidebar {
    width: var(--sidebar-width);
    background: var(--surface);
    border-right: 1px solid var(--border);
    padding: 24px;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 50;
    transition: transform 0.3s ease;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 24px;
    max-width: calc(100% - var(--sidebar-width));
}

.top-bar {
    height: 64px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 40;
    margin-bottom: 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

/* Typography */
h1, h2, h3, h4 { 
    font-family: 'Poppins', sans-serif; 
    color: var(--text);
    margin-top: 0;
}

.playfair { font-family: 'Playfair Display', serif; }
.hindi { font-family: 'Noto Serif Devanagari', serif; font-size: 1.15em; }

/* Components */
.card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.dark .glass {
    background: rgba(30, 41, 59, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Tables */
table { 
    width: 100%; 
    border-collapse: separate; 
    border-spacing: 0;
    margin-top: 20px; 
    font-size: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--surface);
}

th, td { 
    padding: 12px 16px; 
    text-align: left; 
    border-bottom: 1px solid var(--border);
}

th { 
    background-color: var(--surface-2); 
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    position: sticky; 
    top: 0; 
}

tbody tr:hover {
    background-color: var(--surface-2);
    transition: background-color 0.15s ease;
}

tbody tr:nth-child(even) {
    background-color: rgba(0,0,0,0.01);
}

.selected { background-color: rgba(16, 185, 129, 0.1) !important; }

/* Forms */
.form-grid { 
    display: grid; 
    grid-template-columns: 1fr; 
    gap: 16px; 
}

@media (min-width: 640px) {
    .form-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 24px;
    }
}

.form-group { margin-bottom: 20px; }
.form-group label { 
    display: block; 
    margin-bottom: 8px; 
    font-weight: 500; 
    font-size: 0.9rem;
    color: var(--text-muted);
}

.form-group input, .form-group select, .form-group textarea { 
    width: 100%; 
    padding: 10px 14px; 
    background: var(--surface);
    border: 1px solid var(--border); 
    border-radius: var(--radius-md); 
    color: var(--text);
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Buttons */
.btn { 
    cursor: pointer; 
    padding: 10px 20px; 
    border-radius: var(--radius-md); 
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none; 
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
}

.btn:hover { 
    background-color: var(--surface-2); 
    transform: translateY(-1px);
}

.btn.primary { 
    background-color: var(--primary); 
    color: white; 
    border-color: var(--primary); 
}

.btn.primary:hover { 
    background-color: var(--primary-soft); 
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.btn.active { background-color: var(--success); color: white; border-color: var(--success); }

.btn.delete { color: var(--danger); border-color: var(--danger); }
.btn.delete:hover { background-color: var(--danger); color: white; }

/* Floating Action Button */
.fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    border: none;
    z-index: 100;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.fab:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(79, 70, 229, 0.5);
}

/* Sidebar Nav */
.sidebar-logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    text-decoration: none;
    color: var(--text-muted);
    border-radius: var(--radius-md);
    transition: all 0.2s;
}

.sidebar-link:hover, .sidebar-link.active {
    background: var(--primary);
    color: white;
}

.sidebar-link svg { width: 20px; height: 20px; }

/* Breadcrumbs */
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.breadcrumbs a {
    color: var(--text-muted);
    text-decoration: none;
}

.breadcrumbs a:hover { color: var(--primary); }

/* Avatar Improvements */
.avatar-circle {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.avatar-large {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--surface);
    box-shadow: var(--shadow-md);
    margin-bottom: 16px;
}

/* Audio Calc Polish */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 48px;
    text-align: center;
    background: var(--surface-2);
    transition: all 0.3s;
}

.upload-zone:hover {
    border-color: var(--primary);
    background: rgba(79, 70, 229, 0.05);
}

/* Toast Enhanced */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--surface);
    color: var(--text);
    padding: 16px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 2000;
    transform: translateY(100px);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border-left: 4px solid var(--primary);
}

.toast.show { transform: translateY(0); }
.toast-success { border-left-color: var(--success); }
.toast-error { border-left-color: var(--danger); }

/* Graphs */
.graph-container, .circular-tree-container {
    background: var(--surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

#mobile-menu-toggle { display: none; }

/* Utilities */
.header-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 24px;
}
.flex-gap-5 {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}
.flex-center {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}
.margin-top-30 { margin-top: 30px; }
.margin-bottom-15 { margin-bottom: 15px; }
.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

/* Responsive */
@media (max-width: 1024px) {
    #mobile-menu-toggle { display: flex; font-size: 1.5rem; padding: 4px 12px; }
    .sidebar { transform: translateX(-100%); }
    .main-content { margin-left: 0; max-width: 100%; padding: 16px; }
    .sidebar.open { transform: translateX(0); }
    .header-actions { flex-direction: column; align-items: stretch; }
    .card { padding: 16px; }
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, var(--surface-2) 25%, var(--border) 50%, var(--surface-2) 75%);
    background-size: 200% 100%;
    animation: skeleton-load 1.5s infinite;
    border-radius: 4px;
}

@keyframes skeleton-load {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Modal Polish */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    margin: 5% auto;
    padding: 24px;
    width: 90%;
    max-width: 800px;
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}

/* Offline Banner Styling */
#offline-banner {
    display: none;
    background-color: var(--danger);
    color: white;
    text-align: center;
    padding: 12px;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 2000;
    font-weight: 500;
    box-shadow: var(--shadow-md);
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from { transform: translateY(-100%); }
    to { transform: translateY(0); }
}

/* Invitation Cards Layout */
.invitation-cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 24px;
}

.invitation-card {
    background: #ffffff;
    border-radius: 12px;
    padding: 16px 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.2s, box-shadow 0.2s;
}

.invitation-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.invitation-card-name {
    font-size: 19px;
    font-weight: bold;
    margin: 0;
    color: var(--text);
}

.invitation-card-relation {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.btn-outline-danger {
    border: 1px solid var(--danger);
    color: var(--danger);
    background: transparent;
    border-radius: 20px;
    padding: 4px 12px;
    font-size: 0.8rem;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
}

.btn-outline-danger:hover {
    background-color: var(--danger);
    color: white;
}