* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root{
    --primary: #6366f1;
    --secondary: #8b5cf6;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --dark: #1e293b;
    --light: #f8fafc;
    --gray: #64748b;
    --card-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body{
   font-family: sans-serif;
   background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
   min-height: 100vh;
   line-height: 1.6;
}

.dashboard{
    display: grid;
    grid-template-areas: 
        "sidebar header header"
        "sidebar main main"
        "sidebar footer footer";
    grid-template-columns: 280px 1fr 1fr;
    grid-template-rows: 80px 1fr 60px;
    min-height: 100vh;
    gap: 0px
}

.sidebar{
    grid-area: sidebar;
    background: linear-gradient(180deg, var(--dark) 0%, #0f172a 100%);
    color: white;
    padding: 2rem;
    transform: translateX(0);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--card-shadow);
}

.sidebar::before{
   content: "";
   position: absolute;
   top:0;
   left: 0;
   right: 0;
   bottom:0;
   background: linear-gradient(45deg, transparent 0%, rgba(99, 102, 241, 0.1) 50%, transparent 100%);
   transform: translateX(-100%);
   animation: shimmer 2s infinite;
}

.sidebar-header{
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 1.5rem;
    margin-bottom: 2rem;
}

.logo{
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    transition: var(--transition);
    transform: rotate(0deg);
}

.logo:hover{
    transform: rotate(360deg) scale(1.1);
}

.nav-menu{
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0 1rem;
}

.nav-item{
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border-radius: 12px;
    cursor: pointer;
    overflow: hidden;
    position: relative;
    transition: var(--transition);
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);   
}

.nav-item:hover{
    background: rgba(99, 102, 241, 0.2);
    transform: translateX(8px);
}


.nav-icon{
    margin-right: 12px;
}

.header{
    grid-area: header;
    background: rgba(255, 255, 255, 0.95);
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;    
    padding: 0 2rem;
    box-shadow: var(--card-shadow);
}

.search-container{
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 25px;
    padding: 8px 20px;
    min-width: 300px;
    border: 2px solid transparent;
    transition: var(--transition);
}

.search-container:focus-within{ 
    transform: scale(1.02);
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.search-input{
    border: none;
    outline: none;
    flex: 1;
    padding: 8px;
    font-size: 14px;
}

.header-actions{
    display: flex;
    align-items: center;
    gap: 1rem;
}

.notification-badge{
    background: rgba(99, 102, 241, 0.1);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    cursor: pointer;
    position: relative;
    transition: var(--transition);
}

.notification-badge:hover{
    background: var(--primary);
    color: white;
    transform: scale(1.1) rotate(10deg);
}


.notification-badge::after{
    content: '3';
    position: absolute;
    top: -5px;
    right: -5px;
    width: 20px;
    height: 20px;
    background: var(--error);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    border-radius: 50%;
    font-size: 10px;
    animation: pulse 2s infinite;
}

.main-content{
    grid-area: main;
    padding: 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    grid-template-rows: minmax(200px, auto);
    gap: 2rem;
    overflow-y: auto;
}


.stats-grid{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    grid-column: 1 / -1;
}

.stat-card{
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 1.5rem;
    border-radius: 16px;
    min-height: 120px;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    transition: var(--transition);
}

.stat-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    transform: rotate(45deg);
    transition: var(--transition);
}


.stat-card:hover{
    transform: scale(1.05) rotate(2deg);
}



.stat-card:hover::after{
    transform: rotate(45deg) translate(20px, 20px);
}


.stat-number{
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    transform: translateY(0);
    transition: var(--transition);
}

.stat-card:hover .stat-number{
    transform: translateY(-5px);
}

.floating{
    animation: float 3s ease-in-out infinite;
}

.flip-card{
    perspective: 1000px;
    height: 200px;
}

.flip-card-inner{
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

.flip-card:hover .flip-card-inner{
    transform: rotateY(180deg);
}

.flip-card-front, .flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.flip-card-front {
    background: linear-gradient(135deg, var(--success), #34d399);
    color: white;
}

.flip-card-back {
    background: linear-gradient(135deg, var(--warning), #fbbf24);
    color: white;
    transform: rotateY(180deg);
}


.task-board{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    grid-column: 1 / -1;
    gap: 1.5rem;
}

.task-column{
    display: flex;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.8);
    padding: 1rem;
    border-radius: 16px;
    min-height: 400px;
}

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

.task-count{
    background: var(--gray);
    color: white;
    border-radius: 6px;
    padding: 2px;
    font-size: 12px;
    min-width: 20px;
    text-align: center;
}

.task-list{
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 1rem;
}


.task-item {
    background: white;
    border-radius: 12px;
    padding: 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border-left: 4px solid var(--primary);
    transition: var(--transition);
    cursor: grab;
}

.task-item:hover {
    transform: translateX(8px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.task-item:active {
    cursor: grabbing;
    transform: rotate(5deg) scale(1.05);
}

.task-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--dark);
}

.task-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--gray);
}

.priority-badge {
    padding: 2px 8px;
    border-radius: 8px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
}

.priority-high { background: rgba(239, 68, 68, 0.1); color: var(--error); }
.priority-medium { background: rgba(245, 158, 11, 0.1); color: var(--warning); }
.priority-low { background: rgba(16, 185, 129, 0.1); color: var(--success); }













@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse {
    0%{
        transform: scale(1);
    }

    100%{
        transform: scale(1.2);
    }
}


@keyframes shimmer{
    0% {
        transform: translateX(-100%);
    }

    100% {
        transform: translateX(100%);
    }
}