:root {
    --bg-dark: #0A192F;
    --bg-darker: #060F1D;
    --accent-cyan: #64FFDA;
    --accent-teal: #40E0D0;
    --text-main: #E6F1FF;
    --text-muted: #8892B0;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(100, 255, 218, 0.15);
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(100, 255, 218, 0.05) 0%, transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(64, 224, 208, 0.05) 0%, transparent 25%);
    color: var(--text-main);
    overflow-x: hidden;
}

/* Glassmorphism Utilities */
.glass-panel {
    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 8px 32px 0 rgba(0, 0, 0, 0.2);
}

/* Buttons */
.btn-cyan {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-teal) 100%);
    color: var(--bg-dark);
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}
.btn-cyan:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(100, 255, 218, 0.3);
}
.btn-cancel {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--glass-border);
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}
.btn-cancel:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

/* Dashboard Layout */
.admin-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    border-right: 1px solid var(--glass-border);
    padding: 24px 0;
    display: flex;
    flex-direction: column;
}
.brand-logo {
    padding: 0 24px 32px;
    border-bottom: 1px solid var(--glass-border);
    margin-bottom: 24px;
}
.brand-logo img {
    height: 35px;
}
.nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}
.nav-menu li a {
    display: flex;
    align-items: center;
    padding: 14px 24px;
    color: var(--text-muted);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}
.nav-menu li a i {
    width: 24px;
    margin-right: 12px;
    font-size: 1.1rem;
}
.nav-menu li a:hover, .nav-menu li a.active {
    color: var(--accent-cyan);
    background: rgba(100, 255, 218, 0.05);
    border-left-color: var(--accent-cyan);
}

/* Main Content Area */
.main-wrapper {
    display: flex;
    flex-direction: column;
}
.topbar {
    height: 70px;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    background: rgba(10, 25, 47, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
}
.content-area {
    padding: 32px;
    flex-grow: 1;
}

/* Base Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}
.data-table th, .data-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--glass-border);
}
.data-table th {
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}
.data-table tbody tr {
    transition: background 0.3s ease;
}
.data-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}
/* Settings Navigation */
.settings-nav { margin-top: 20px; }
.settings-nav li { margin-bottom: 12px; }
.s-nav-link {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.03);
    transition: all 0.3s ease;
    border: 1px solid transparent;
}
.s-nav-link i { margin-right: 15px; font-size: 1.1rem; width: 24px; text-align: center; }
.s-nav-link:hover {
    background: rgba(100, 255, 218, 0.08);
    color: var(--accent-cyan);
    border-color: rgba(100, 255, 218, 0.2);
    transform: translateX(5px);
}
.s-nav-link.active {
    background: linear-gradient(135deg, rgba(100, 255, 218, 0.2), rgba(100, 255, 218, 0.05));
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 15px rgba(100, 255, 218, 0.1);
}

.s-tab-content h3 {
    color: var(--accent-cyan);
    font-size: 1.5rem;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 15px;
}

/* Profile Styles */
.profile-avatar-wrapper {
    transition: transform 0.3s ease;
}
.profile-avatar-wrapper:hover {
    transform: scale(1.05);
}
.avatar-preview {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent-cyan);
    background: var(--bg-darker);
    box-shadow: 0 0 20px rgba(100, 255, 218, 0.2);
}
.avatar-edit-overlay {
    position: absolute;
    bottom: 5px;
    right: 5px;
    width: 40px;
    height: 40px;
    background: var(--accent-cyan);
    color: var(--bg-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 3px solid var(--bg-dark);
    transition: all 0.3s ease;
    z-index: 10;
}
.avatar-edit-overlay:hover {
    transform: rotate(15deg) scale(1.1);
    background: var(--text-main);
}
.profile-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}
.form-input {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 14px 18px;
    color: var(--text-main);
    outline: none;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}
.form-input:focus {
    border-color: var(--accent-cyan);
    background: rgba(100, 255, 218, 0.08);
    box-shadow: 0 0 15px rgba(100, 255, 218, 0.1);
}
select.form-input {
    background-color: #0A192F;
    color: var(--text-main);
    appearance: auto;
}
select.form-input option {
    background-color: #0A192F;
    color: var(--text-main);
    padding: 8px;
}
.form-group label {
    display: block;
    margin-bottom: 10px;
    color: var(--text-muted);
    font-weight: 500;
}

/* Billing Styles */
.billing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}
.stat-card.revenue { border-bottom: 4px solid #64FFDA; }
.stat-card.expenses { border-bottom: 4px solid #ff6b6b; }
.stat-card.net { border-bottom: 4px solid #40E0D0; }

/* Modal System */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}
.modal-content {
    background: #0A192F;
    border: 1px solid var(--accent-cyan);
    padding: 30px;
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    position: relative;
    box-shadow: 0 0 50px rgba(100, 255, 218, 0.1);
}
.form-group-full {
    grid-column: span 2;
    margin-bottom: 20px;
}
.form-group {
    margin-bottom: 20px;
}
.btn-cancel {
    background: transparent;
    border: 1px solid var(--text-muted);
    color: var(--text-muted);
    padding: 12px 24px;
    border-radius: 8px;
    cursor: pointer;
    margin-right: 10px;
}