:root {
    --bg-dark: #0a0a0b;
    --sidebar-bg: #121214;
    --card-bg: rgba(255, 255, 255, 0.03);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #ffffff;
    --text-secondary: #94949e;
    --accent-color: #ff3b30;
    --accent-hover: #ff453a;
    --success: #34c759;
    --warning: #ff9f0a;
    --glass-blur: blur(12px);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    overflow-x: hidden;
}

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

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.logo-icon {
    color: var(--accent-color);
}

.main-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1rem;
    text-decoration: none;
    color: var(--text-secondary);
    border-radius: 12px;
    transition: var(--transition);
}

.nav-link i {
    width: 20px;
}

.nav-link:hover {
    background: var(--card-bg);
    color: var(--text-primary);
}

.nav-link.active {
    background: var(--accent-color);
    color: white;
}

/* Main Content */
.content {
    flex: 1;
    margin-left: 260px;
    padding: 2rem 3rem;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    width: 400px;
}

.search-box input {
    background: none;
    border: none;
    color: white;
    outline: none;
    width: 100%;
}

.avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-color), #ff7b72);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

/* Dashboard Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 20px;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
}

.stat-card .label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.stat-card .value {
    font-size: 1.75rem;
    font-weight: 700;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    border: none;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 8px 16px rgba(255, 59, 48, 0.2);
}

/* Tables */
.data-table-container {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
}

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

th {
    text-align: left;
    padding: 1.25rem 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

td {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: rgba(255, 255, 255, 0.01);
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: capitalize;
}

.status-draft { background: rgba(148, 148, 158, 0.15); color: #94949e; }
.status-sent { background: rgba(255, 159, 10, 0.15); color: #ff9f0a; }
.status-accepted { background: rgba(52, 199, 89, 0.15); color: #34c759; }

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.form-control {
    width: 100%;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 0.875rem 1rem;
    border-radius: 12px;
    color: white;
    outline: none;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.05);
}

/* Actions */
.actions {
    display: flex;
    gap: 0.5rem;
}

.btn-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    transition: var(--transition);
}

.btn-icon:hover {
    background: var(--accent-color);
    color: white;
}