:root {
    --bg-dark: #0d1117;
    --card-dark: #161b22;
    --accent-green: #00c853;
    --accent-hover: #00e676;
    --text-primary: #f0f6fc;
    --text-white-50: #8b949e;
    --border-color: #30363d;
    --glass-bg: rgba(22, 27, 34, 0.7);
}

html, body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: 'Inter', 'Segoe UI', Roboto, sans-serif;
    margin: 0;
    padding: 0;
}

/* --- Dashboard Grid & Cards --- */
.card {
    background-color: var(--card-dark) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 16px !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(8px);
}

    .card:hover {
        transform: translateY(-8px);
        border-color: var(--accent-green) !important;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    }

/* --- QR Code Container Customization --- */
div[id^="qr-target-"] {
    padding: 15px;
    border-radius: 12px;
    display: inline-block;
    background-color: #ffffff; /* QR codes need white bg for scanability */
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    border: 2px solid var(--accent-green);
    position: relative;
    transition: transform 0.2s;
}

    div[id^="qr-target-"]:hover {
        transform: scale(1.02);
    }

/* --- Modern Buttons --- */
.btn-success {
    background-color: var(--accent-green) !important;
    border: none !important;
    color: #000 !important;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 8px;
}

    .btn-success:hover {
        background-color: #059669;
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
    }

.btn-outline-info {
    border-color: var(--border-color) !important;
    color: var(--text-primary) !important;
}

.btn-outline-danger {
    border-color: rgba(255, 82, 82, 0.3) !important;
    color: #ff5252 !important;
}

/* --- Login Page Centering --- */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at center, #161b22 0%, #0d1117 100%);
}

.login-box {
    /* Fixed width logic */
    width: 440px;
    max-width: 95vw; /* Safety for mobile screens so it doesn't overflow */
    /* Layout & Spacing */
    margin: 2rem auto;
    padding: 2.5rem;
    /* TechUnited Glass Styling */
    background: var(--glass-bg, rgba(20, 20, 20, 0.8));
    backdrop-filter: blur(15px);
    border: 1px solid var(--border-color, rgba(255, 255, 255, 0.1));
    border-radius: 20px;
    /* Depth */
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    /* Ensure child elements don't break the width */
    box-sizing: border-box;
}
.bg-dark-glass {
    background: rgba(22, 27, 34, 0.8) !important;
    backdrop-filter: blur(12px);
    border: 1px solid #30363d !important;
}

.text-success {
    color: #10b981 !important;
}