:root {
    --primary-color: #2196f3;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --danger-color: #f44336;
    --dark-bg: #1a1a1a;
    --card-bg: rgba(255, 255, 255, 0.05);
    --text-color: #ffffff;
    --glass-border: 1px solid rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

* {
    box-sizing: border-box;
    user-select: none;
    /* Prevent text selection on touch devices */
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-color);
    height: 100vh;
    width: 100vw;
    overflow: hidden;
    /* Prevent scrolling on fixed panel */
}

/* Main Layout */
.panel-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    /* 4 columns */
    grid-template-rows: repeat(2, 1fr);
    /* 2 rows */
    gap: 10px;
    padding: 10px;
    height: 100vh;
    width: 100vw;
}

/* Charger Card */
.charger-card {
    position: relative;
    background: var(--card-bg);
    border: var(--glass-border);
    border-radius: 15px;
    backdrop-filter: blur(4px);
    box-shadow: var(--glass-shadow);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    overflow: hidden;
}

.charger-card:active {
    transform: scale(0.98);
}

/* Status Backgrounds */
/* Status Backgrounds */
.charger-card.available {
    background: radial-gradient(circle at center, rgba(76, 175, 80, 0.2) 0%, rgba(76, 175, 80, 0.05) 70%);
    border-color: rgba(76, 175, 80, 0.3);
}

.charger-card.charging {
    background: radial-gradient(circle at center, rgba(76, 175, 80, 0.4) 0%, rgba(76, 175, 80, 0.1) 70%);
    border-color: rgba(76, 175, 80, 0.6);
    animation: breathing-green 3s infinite ease-in-out;
}

.charger-card.suspended-ev {
    background: rgba(76, 175, 80, 0.3); /* Solid Green */
    border-color: rgba(76, 175, 80, 0.8);
    box-shadow: 0 0 15px rgba(76, 175, 80, 0.3);
}

.charger-card.preparing {
    background: radial-gradient(circle at center, rgba(255, 152, 0, 0.3) 0%, rgba(255, 152, 0, 0.1) 70%);
    border-color: rgba(255, 152, 0, 0.5);
    animation: pulsing-orange 2s infinite;
}

.charger-card.in-use {
    /* Fallback for generic in-use if not specific */
    background: radial-gradient(circle at center, rgba(33, 150, 243, 0.2) 0%, rgba(33, 150, 243, 0.05) 70%);
    border-color: rgba(33, 150, 243, 0.3);
}

.charger-card.error, .charger-card.faulted {
    background: radial-gradient(circle at center, rgba(244, 67, 54, 0.3) 0%, rgba(244, 67, 54, 0.1) 70%);
    border-color: rgba(244, 67, 54, 0.6);
    animation: pulse-red 2s infinite;
}

.charger-card.out-of-order {
    background: #111;
    border-color: #333;
    opacity: 0.7;
}

/* Animations */
@keyframes breathing-green {
    0% { box-shadow: 0 0 5px rgba(76, 175, 80, 0.2); border-color: rgba(76, 175, 80, 0.4); }
    50% { box-shadow: 0 0 20px rgba(76, 175, 80, 0.6); border-color: rgba(76, 175, 80, 1.0); }
    100% { box-shadow: 0 0 5px rgba(76, 175, 80, 0.2); border-color: rgba(76, 175, 80, 0.4); }
}

@keyframes pulsing-orange {
    0% { opacity: 0.8; }
    50% { opacity: 1.0; box-shadow: 0 0 15px rgba(255, 152, 0, 0.4); }
    100% { opacity: 0.8; }
}

@keyframes pulse-red {
    0% { border-color: rgba(244, 67, 54, 0.4); }
    50% { border-color: rgba(244, 67, 54, 1.0); box-shadow: 0 0 15px rgba(244, 67, 54, 0.4); }
    100% { border-color: rgba(244, 67, 54, 0.4); }
}

/* Central Icon Container */
.icon-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 180px;
    /* Large icon size */
    height: 180px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.ev-icon {
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0.9;
}

/* Charger Number Overlay */
.charger-number {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 100px;
    /* Large number */
    font-weight: bold;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
    z-index: 10;
}

/* Corner Data */
.corner-data {
    position: absolute;
    font-size: 1.2rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
    padding: 10px;
    z-index: 5;
}

.top-left {
    top: 0;
    left: 0;
}

.top-right {
    top: 0;
    right: 0;
}

.bottom-left {
    bottom: 0;
    left: 0;
}

.bottom-right {
    bottom: 0;
    right: 0;
}

/* Customer Info (Bottom Right) */
.customer-info {
    color: var(--warning-color);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 100;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(5px);
}

.modal-content {
    background: #2d2d2d;
    border-radius: 20px;
    padding: 30px;
    width: 600px;
    max-width: 90%;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    text-align: center;
}

.modal-header {
    font-size: 24px;
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 15px;
}

.modal-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 30px;
}

.btn {
    padding: 20px;
    border: none;
    border-radius: 10px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.1s;
    color: white;
}

.btn:active {
    transform: scale(0.95);
}

.btn-primary {
    background: var(--primary-color);
}

.btn-success {
    background: var(--success-color);
}

.btn-danger {
    background: var(--danger-color);
}

.btn-warning {
    background: var(--warning-color);
    color: black;
}

.input-group {
    margin: 20px 0;
    text-align: left;
}

.input-group label {
    display: block;
    margin-bottom: 10px;
    font-size: 16px;
    color: #aaa;
}

.input-group input {
    width: 100%;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid #444;
    background: #333;
    color: white;
    font-size: 20px;
    text-align: center;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Header Styles */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    height: 60px;
    position: relative;
    z-index: 2000; /* Ensure it's above everything */
}

.app-header h1 {
    margin: 0;
    font-size: 24px;
    font-weight: 600;
    cursor: pointer;
    /* Hint that it's clickable */
}

.header-clock {
    font-size: 20px;
    font-weight: 500;
    color: #aaa;
    font-family: monospace;
}

.panel-container {
    height: calc(100vh - 60px);
    /* Adjust for header height */
}