@import url("https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap");

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

/* Theme variables */
:root {
    --lg-bg-color: rgba(255, 255, 255, 0.12); /* Glass background */
    --lg-highlight: rgba(255, 255, 255, 0.4); /* Border highlight */
    --lg-text: #ffffff;
    --accent-blue: #00d9ffcc;
}

/* Base body styling */
body {
    font-family: "Poppins", sans-serif;
    color: var(--lg-text);
    overflow-x: hidden;
}

/* Background video */
#bg-video {
    position: fixed;
    right: 0;
    bottom: 0;
    min-width: 100%;
    min-height: 100%;
    z-index: -1;
    object-fit: cover;
}

/* Main overlay container */
.content-overlay {
    background: rgba(0, 0, 0, 0.1); 
    min-height: 100vh; /* Full viewport height */
    width: 100vw;      /* Full viewport width */
    padding: 40px 20px;

    display: flex;
    justify-content: center; /* Horizontal center */
    align-items: center;     /* Vertical center */
}

/* Main content wrapper */
.container {
    width: 100%;
    max-width: 850px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    font-size: 3rem;
    text-shadow: 0 0 15px rgba(0, 212, 255, 0.6);
}

/* Glass effect cards */
.input-card, .invoice-paper {
    position: relative;
    background: var(--lg-bg-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 25px;
    border: 1px solid var(--lg-highlight);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

/* Form and inputs */
.input-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 15px;
}

input {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 12px;
    border-radius: 10px;
    color: white;
    flex: 1;
    min-width: 120px;
}

input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

/* Add button */
.btn-add {
    background: var(--accent-blue);
    color: #000;
    border: none;
    padding: 12px 25px;
    border-radius: 10px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s;
}

.btn-add:hover {
    transform: scale(1.05);
}

/* Table styling */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

th {
    text-align: left;
    border-bottom: 2px solid rgba(255, 255, 255, 0.2);
    padding: 10px;
    color: var(--accent-blue);
}

td {
    padding: 12px 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* Summary and totals */
.summary {
    text-align: right;
    margin-top: 20px;
}

.grand-total {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-blue);
    margin-top: 10px;
}

/* Action buttons */
.action-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.btn-print, .btn-clear {
    padding: 12px 30px;
    border-radius: 10px;
    border: 1px solid white;
    background: transparent;
    color: white;
    cursor: pointer;
    font-weight: bold;
}

.btn-print {
    background: rgba(255, 255, 255, 0.1);
}

.btn-print:hover {
    background: white;
    color: black;
}

/* Print mode */
@media print {
    #bg-video, .video-container, .input-card, .action-buttons {
        display: none !important;
    }
    body, .content-overlay {
        background: white !important;
        color: black !important;
    }
    .invoice-paper {
        background: white !important;
        color: black !important;
        backdrop-filter: none;
        box-shadow: none;
        border: none;
        width: 100%;
    }
    .grand-total, th {
        color: black !important;
    }
}

/* Footer social links */
.footer-social {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 10;
}

.social-wrapper {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 10px 20px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.social-icon {
    width: 25px;
    height: 25px;
    filter: invert(1);
    transition: transform 0.3s ease;
}

.social-icon:hover {
    transform: translateY(-3px) scale(1.1);
}

.social-divider {
    width: 1px;
    height: 20px;
    background: rgba(255, 255, 255, 0.3);
}

/* Hide footer when printing */
@media print {
    .footer-social {
        display: none !important;
    }
}