:root {
    --bg-dark: #121212;
    --bg-card: #1E1E1E;
    --bg-sidebar: #181818;
    --primary: #00E676;
    /* Emerald */
    --primary-dim: rgba(0, 230, 118, 0.1);
    --text-main: #E0E0E0;
    --text-dim: #A0A0A0;
    --border: #333;
    --danger: #FF5252;
}

* {
    box-sizing: border-box;
    font-family: 'Segoe UI', Inter, sans-serif;
}

body {
    margin: 0;
    background-color: var(--bg-dark);
    color: var(--text-main);
    height: 100vh;
    display: flex;
    overflow: hidden;
}

/* SIDEBAR */
.sidebar {
    width: 250px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding-top: 20px;
    padding-left: 10px;
    padding-right: 10px;
    gap: 10px;
}

.sidebar h2 {
    margin: 0 0 20px 10px;
    color: var(--primary);
    font-size: 1.2em;
}

.nav-btn {
    width: 100%;
    /* height: 50px; Removed fixed height */
    padding: 12px 15px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 10px;
    cursor: pointer;
    font-size: 16px;
    color: var(--text-dim);
    transition: all 0.2s;
    background: transparent;
    border: none;
    text-align: left;
}

.nav-btn:hover {
    background-color: #2A2A2A;
    color: var(--text-main);
}

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

/* MAIN CONTENT */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

/* TABS */
.tab-content {
    display: none;
    flex: 1;
    padding: 20px;
    overflow-y: auto;
}

.tab-content.active {
    display: flex;
    flex-direction: column;
}

/* CHAT */
#chat-container {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
    padding-bottom: 20px;
}

.bubble {
    max-width: 70%;
    padding: 12px 18px;
    border-radius: 18px;
    line-height: 1.4;
    position: relative;
    animation: fadeIn 0.3s ease;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.bubble.user {
    align-self: flex-end;
    background-color: var(--primary);
    color: #000;
    border-bottom-right-radius: 4px;
}

.bubble.ai {
    align-self: flex-start;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-bottom-left-radius: 4px;
}

.chat-input-area {
    background-color: var(--bg-card);
    padding: 15px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 10px;
}

input,
textarea {
    background-color: #2A2A2A;
    border: 1px solid var(--border);
    color: white;
    padding: 10px;
    border-radius: 8px;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
}

/* DEVICES GRID */
.devices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.device-card {
    background: rgba(30, 30, 30, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    transition: transform 0.2s;
}

.device-card:hover {
    transform: translateY(-2px);
    border-color: #555;
}

.device-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 15px;
}

.device-name {
    font-weight: bold;
    font-size: 1.1em;
    color: var(--primary);
}

.device-id {
    font-size: 0.8em;
    color: var(--text-dim);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.9em;
    margin-bottom: 5px;
    color: #ccc;
}

.status-badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8em;
    font-weight: bold;
}

.status-online {
    background: rgba(0, 230, 118, 0.2);
    color: var(--primary);
}

.status-offline {
    background: rgba(255, 82, 82, 0.2);
    color: var(--danger);
}

.status-warning {
    background: rgba(255, 193, 7, 0.2);
    color: #FFC107;
}

.device-actions {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.icon-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-dim);
    font-size: 1.2em;
    transition: color 0.2s;
}

.icon-btn:hover {
    color: white;
}

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

/* MODAL */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--bg-card);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border);
    width: 350px;
    text-align: center;
}

.blur {
    filter: blur(5px);
    pointer-events: none;
}

button {
    padding: 8px 16px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-weight: bold;
}

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

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

.btn-secondary {
    background: #444;
    color: white;
}