@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --font-primary: 'Plus Jakarta Sans', sans-serif;
    --font-secondary: 'Inter', sans-serif;
    
    /* Light Mode Variables */
    --bg-primary: #f8fafc;
    --bg-card: #ffffff;
    --bg-sidebar: #0f172a;
    --sidebar-text: #94a3b8;
    --sidebar-active-bg: #1e293b;
    --sidebar-active-text: #ffffff;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --accent-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    --sidebar-width: 260px;
    --topbar-height: 70px;
}

[data-theme="dark"] {
    /* Dark Mode Variables */
    --bg-primary: #0b0f19;
    --bg-card: #151c2c;
    --bg-sidebar: #0b0f19;
    --sidebar-text: #94a3b8;
    --sidebar-active-bg: #1e293b;
    --sidebar-active-text: #6366f1;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --border-color: #1e293b;
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.5);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

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

.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    color: var(--sidebar-text);
    transition: all 0.3s ease;
    flex-shrink: 0;
    border-right: 1px solid var(--border-color);
    z-index: 1000;
}

.sidebar-brand {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: #ffffff;
    border-bottom: 1px solid #1e293b;
    letter-spacing: 0.5px;
}

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

.sidebar-menu {
    padding: 1.5rem 0.75rem;
    list-style: none;
    margin: 0;
}

.sidebar-menu li {
    margin-bottom: 0.25rem;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--sidebar-text);
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.925rem;
    transition: all 0.2s ease;
}

.sidebar-menu a i {
    width: 1.5rem;
    font-size: 1.1rem;
    margin-right: 0.75rem;
}

.sidebar-menu a:hover,
.sidebar-menu li.active a {
    background-color: var(--sidebar-active-bg);
    color: var(--sidebar-active-text);
}

/* Content Area */
.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 100vh;
}

.topbar {
    height: var(--topbar-height);
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    transition: background-color 0.3s ease;
}

.content-body {
    padding: 2rem;
    flex-grow: 1;
}

/* Modern Card Design */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.3s ease;
    margin-bottom: 1.5rem;
}

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

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

/* Quick Statistics Cards */
.stat-card {
    position: relative;
    overflow: hidden;
}

.stat-card .icon-box {
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
}

.stat-card.success .icon-box {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--accent-color);
}

.stat-card.danger .icon-box {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.stat-card.warning .icon-box {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

/* Dashboard Activity Log */
.activity-timeline {
    position: relative;
    padding-left: 1.5rem;
    border-left: 2px solid var(--border-color);
}

.activity-item {
    position: relative;
    padding-bottom: 1.5rem;
}

.activity-item::before {
    content: '';
    position: absolute;
    left: -2rem;
    top: 0.25rem;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--primary-color);
    border: 2px solid var(--bg-card);
}

.activity-item.success::before { background-color: var(--accent-color); }
.activity-item.danger::before { background-color: var(--danger-color); }
.activity-item.warning::before { background-color: var(--warning-color); }

/* Buttons & Inputs */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

.form-control, .form-select {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 0.5rem;
}

.form-control:focus, .form-select:focus {
    background-color: var(--bg-card);
    color: var(--text-primary);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.25);
}

/* Theme Toggle Switch */
.theme-toggle {
    cursor: pointer;
    font-size: 1.25rem;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

.theme-toggle:hover {
    color: var(--primary-color);
}

/* Kanban Drag & Drop Mock */
.kanban-board {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    padding-bottom: 1rem;
}

.kanban-column {
    flex: 0 0 300px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1rem;
}

.kanban-column-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    font-weight: 600;
}

.kanban-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1rem;
    margin-bottom: 0.75rem;
    box-shadow: var(--shadow-sm);
    cursor: grab;
}