:root {
    --bg-color: #0f0c29;
    --bg-gradient: linear-gradient(301deg, #0f0c29, #302b63, #24243e);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --accent-color: #6a11cb;
    --accent-hover: #2575fc;
    --success: #00b894;
    --warning: #fdcb6e;
    --danger: #d63031;
    --info: #0984e3;
    --font-family: 'Outfit', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-family);
}

body {
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Utilities */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.hidden {
    display: none !important;
}

.btn-primary {
    background: linear-gradient(45deg, var(--accent-color), var(--accent-hover));
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(106, 17, 203, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Login Overlay */
.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(0, 0, 0, 0.8);
    /* Darker backdrop */
    z-index: 9999;
}

.login-card {
    padding: 40px;
    width: 100%;
    max-width: 400px;
    text-align: center;
    background: rgba(15, 12, 41, 0.9);
    /* Opaque for readability */
}

.logo-area i {
    font-size: 3rem;
    color: var(--accent-color);
    margin-bottom: 10px;
}

.login-card h1 {
    font-size: 1.8rem;
    margin-bottom: 5px;
}

.login-card p {
    color: var(--text-secondary);
    margin-bottom: 25px;
}

.input-group {
    position: relative;
    margin-bottom: 20px;
}

.input-group i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.input-group input {
    width: 100%;
    padding: 12px 15px 12px 40px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: white;
    outline: none;
}

.input-group input:focus {
    border-color: var(--accent-color);
}

.error-msg {
    color: var(--danger);
    font-size: 0.9rem;
    margin-top: 10px;
    min-height: 20px;
}

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

/* Sidebar */
.sidebar {
    width: 260px;
    margin: 20px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    height: calc(100vh - 40px);
    position: fixed;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 40px;
    color: var(--accent-hover);
}

.sidebar nav ul {
    list-style: none;
}

.sidebar nav li {
    padding: 15px;
    margin-bottom: 10px;
    cursor: pointer;
    border-radius: 10px;
    color: var(--text-secondary);
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar nav li:hover,
.sidebar nav li.active {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transform: translateX(5px);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 300px;
    /* Sidebar width + margin */
    padding: 20px;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 25px;
    margin-bottom: 30px;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Sections */
.view-section {
    display: none;
    animation: fadeIn 0.4s ease;
}

.view-section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Dashboard Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.icon-box {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
}

.icon-box.purple {
    background: rgba(106, 17, 203, 0.2);
    color: #6a11cb;
}

.icon-box.green {
    background: rgba(0, 184, 148, 0.2);
    color: #00b894;
}

.icon-box.orange {
    background: rgba(253, 203, 110, 0.2);
    color: #fdcb6e;
}

.icon-box.blue {
    background: rgba(9, 132, 227, 0.2);
    color: #0984e3;
}

.stat-info h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.stat-info p {
    font-size: 1.5rem;
    font-weight: 700;
}

/* Charts Area */
.charts-area {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.chart-card,
.info-panel {
    padding: 20px;
    height: 400px;
}

/* Catalogue Grid */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    /* Smaller cards */
    gap: 20px;
}

.book-card {
    padding: 10px;
    transition: transform 0.2s;
    text-align: center;
}

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

.book-card img {
    width: 100%;
    height: 140px;
    /* Fixed height for consistency */
    object-fit: contain;
    /* Contain to show full cover */
    border-radius: 8px;
    margin-bottom: 10px;
    background: rgba(255, 255, 255, 0.02);
}

.book-info h4 {
    font-size: 0.95rem;
    margin-bottom: 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.book-info p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

/* Inventory Table */
.toolbar {
    padding: 15px;
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.search-box {
    position: relative;
    width: 300px;
}

.search-box i {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.search-box input {
    width: 100%;
    padding: 10px 10px 10px 35px;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.05);
    color: white;
    outline: none;
}

.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

th {
    color: var(--text-secondary);
    font-weight: 500;
}

td img {
    width: 40px;
    height: 40px;
    border-radius: 6px;
    object-fit: cover;
}

.status-badge {
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
}

.status-Pending {
    background: rgba(253, 203, 110, 0.2);
    color: #fdcb6e;
}

.status-Delivered {
    background: rgba(0, 184, 148, 0.2);
    color: #00b894;
}

.status-Returned {
    background: rgba(214, 48, 49, 0.2);
    color: #d63031;
}

.status-Cancelled {
    background: rgba(99, 110, 114, 0.2);
    color: #636e72;
}

/* Forms */
.form-card {
    max-width: 800px;
    margin: 0 auto;
    padding: 30px;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 20px 0;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-group input,
.form-group select {
    padding: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: white;
    outline: none;
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--accent-color);
}

.form-group select option {
    background: #24243e;
    /* Solid background for dropdown items */
}

/* Date Inputs */
.date-input {
    padding: 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: white;
    outline: none;
    font-family: var(--font-family);
    color-scheme: dark;
}

.date-input::-webkit-calendar-picker-indicator {
    cursor: pointer;
    filter: invert(1);
}

/* Activity List */
.activity-list {
    list-style: none;
    padding: 0;
    max-height: 300px;
    overflow-y: auto;
}

.activity-list li {
    background: rgba(255, 255, 255, 0.05);
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}