:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --accent-color: #38bdf8;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(circle at 0% 0%, rgba(56, 189, 248, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 100% 100%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    color: var(--text-primary);
    min-height: 100vh;
    margin: 0;
    overflow-x: hidden;
}

/* Navigation */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-brand {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--accent-color);
}

.logout-link {
    color: var(--danger) !important;
}

.main-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
    min-height: calc(100vh - 64px);
}

.container {
    width: 100%;
    max-width: 500px;
    padding: 2rem;
    text-align: center;
    animation: fadeIn 0.8s ease-out;
}

header {
    margin-bottom: 2.5rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: -0.025em;
    margin-bottom: 0.5rem;
}

.accent {
    color: var(--accent-color);
    text-shadow: 0 0 20px rgba(56, 189, 248, 0.3);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--text-secondary);
    position: relative;
}

.status-indicator::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: inherit;
    animation: pulse 2s infinite;
}

.online { background-color: var(--warning); }
.success { background-color: var(--success); }
.offline { background-color: var(--danger); }

.qr-container {
    background: white;
    padding: 1.5rem;
    border-radius: 1.5rem;
    width: 320px;
    height: 320px;
    margin: 0 auto 2.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}

#qr-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    animation: scaleIn 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.placeholder {
    color: #1e293b;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(56, 189, 248, 0.1);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.check-icon {
    width: 64px;
    height: 64px;
    background: var(--success);
    color: white;
    font-size: 2rem;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 1rem;
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.4);
}

.instructions {
    text-align: left;
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--glass-border);
}

.instructions h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.instructions ol {
    padding-left: 1.25rem;
    color: var(--text-secondary);
}

.instructions li {
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    line-height: 1.5;
}

.instructions strong {
    color: var(--text-primary);
}

footer {
    margin-top: auto;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
    opacity: 0.6;
    text-align: center;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.8; }
    70% { transform: scale(2); opacity: 0; }
    100% { transform: scale(1); opacity: 0; }
}