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

:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #25D366;
    --primary-hover: #1da851;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --border-color: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    background-image: 
        radial-gradient(at 0% 0%, rgba(37, 211, 102, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(59, 130, 246, 0.1) 0px, transparent 50%),
        radial-gradient(at 50% 100%, rgba(139, 92, 246, 0.1) 0px, transparent 50%);
    background-attachment: fixed;
    transition: background-color 0.5s ease;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: linear-gradient(180deg, var(--card-bg) 0%, rgba(15, 23, 42, 0.6) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 4px 0 24px rgba(0,0,0,0.2);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
    z-index: 10;
}

.brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0 1rem;
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    transform: translateX(4px);
}

.nav-links a.active {
    background: var(--primary-gradient);
    color: #fff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem 3rem;
    overflow-y: auto;
}

header {
    margin-bottom: 2rem;
}

h1 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-muted);
}

/* Cards */
.card {
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(30, 41, 59, 0.4) 100%);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15), inset 0 1px 0 rgba(255,255,255,0.05);
    padding: 2rem;
    margin-bottom: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.1);
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

/* Status Badge */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-weight: 600;
    font-size: 0.875rem;
    background: rgba(255,255,255,0.1);
}

.status-badge.active {
    background: rgba(37, 211, 102, 0.2);
    color: var(--primary);
}

.status-badge.inactive {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: currentColor;
}
.status-badge.active .status-dot {
    box-shadow: 0 0 8px var(--primary);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(37, 211, 102, 0); }
    100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

/* QR Container */
.qr-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    border: 1px dashed var(--border-color);
}

.qr-container img {
    border-radius: 8px;
    max-width: 250px;
    background: white;
    padding: 10px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    border: none;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary {
    background: var(--primary-gradient);
    color: #fff;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.btn-danger {
    background: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
}

.btn-danger:hover {
    background: var(--danger);
    color: #fff;
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.3);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: white;
    transition: all 0.3s;
}
.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(37, 211, 102, 0.2);
}

select.form-control option {
    background-color: var(--card-bg);
    color: var(--text-main);
}

/* Tables */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 1rem;
}

th, td {
    padding: 1rem 1.2rem;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

th {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

tbody tr {
    transition: all 0.2s ease;
}

tbody tr:hover {
    background: rgba(255, 255, 255, 0.03);
    transform: scale(1.005);
}

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

.actions {
    display: flex;
    gap: 0.5rem;
}

.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.75rem;
}