/* ===== RESET & VARIÁVEIS ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary:    #1a73e8;
    --primary-dk: #1557b0;
    --success:    #28a745;
    --danger:     #dc3545;
    --warning:    #ffc107;
    --secondary:  #6c757d;
    --bg:         #0f1117;
    --bg-card:    #1a1d27;
    --bg-card2:   #21253a;
    --border:     #2e3250;
    --text:       #e0e6ff;
    --text-muted: #8892b0;
    --blue-glow:  rgba(26, 115, 232, 0.4);
    --radius:     12px;
    --transition: 0.3s ease;
}

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    background-image: 
        radial-gradient(ellipse at 20% 20%, rgba(26,115,232,0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(26,115,232,0.06) 0%, transparent 50%);
}

/* ===== HEADER ===== */
.header {
    background: linear-gradient(135deg, #1a1d27, #0d1b40);
    border-bottom: 1px solid var(--border);
    padding: 1.2rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

.header-content {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-content i {
    font-size: 1.8rem;
    color: var(--primary);
    animation: pulse-blue 2s infinite;
}

.header-content h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #fff, #93c5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    flex: 1;
}

.badge {
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(220,53,69,0.2);
    color: #ff6b7a;
    border: 1px solid rgba(220,53,69,0.4);
    transition: var(--transition);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.badge.connected {
    background: rgba(40,167,69,0.2);
    color: #5dde7a;
    border-color: rgba(40,167,69,0.4);
}

/* ===== CONTAINER ===== */
.container {
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1.5rem;
    display: grid;
    gap: 1.5rem;
}

/* ===== CARDS ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: var(--transition);
}

.card:hover {
    border-color: rgba(26,115,232,0.4);
    box-shadow: 0 4px 20px rgba(26,115,232,0.08);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1.2rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid var(--border);
}

.card-header i {
    color: var(--primary);
    font-size: 1.1rem;
}

.card-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    flex: 1;
}

/* ===== DEVICE INFO ===== */
.device-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    color: var(--text-muted);
    gap: 0.8rem;
}

.device-placeholder i {
    font-size: 2.5rem;
    opacity: 0.3;
}

.device-connected {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(40,167,69,0.08);
    border: 1px solid rgba(40,167,69,0.2);
    border-radius: 8px;
}

.device-connected .device-icon {
    width: 48px;
    height: 48px;
    background: rgba(40,167,69,0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: #5dde7a;
}

.device-connected .device-name {
    font-weight: 600;
    font-size: 1rem;
}

.device-connected .device-id {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: monospace;
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.form-group label i {
    margin-right: 5px;
    color: var(--primary);
}

textarea,
input[type="text"] {
    width: 100%;
    padding: 12px;
    background: var(--bg-card2);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 0.9rem;
    font-family: inherit;
    transition: var(--transition);
    resize: vertical;
}

textarea:focus,
input[type="text"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26,115,232,0.15);
}

.form-group small {
    display: block;
    margin-top: 4px;
    font-size: 0.72rem;
    color: var(--text-muted);
}

/* ===== BOTÕES ===== */
.card-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    letter-spacing: 0.3px;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

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

.btn-primary:hover {
    background: var(--primary-dk);
    box-shadow: 0 4px 15px var(--blue-glow);
    transform: translateY(-1px);
}

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

.btn-success:hover {
    background: #218838;
    box-shadow: 0 4px 15px rgba(40,167,69,0.4);
    transform: translateY(-1px);
}

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

.btn-danger:hover {
    background: #c82333;
    box-shadow: 0 4px 15px rgba(220,53,69,0.4);
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-1px);
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    transition: var(--transition);
    font-size: 0.9rem;
}

.btn-icon:hover {
    background: var(--bg-card2);
    color: var(--text);
}

/* ===== COMANDOS RÁPIDOS ===== */
.quick-commands {
    margin: 1rem 0;
}

.quick-commands p {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.quick-commands p i {
    margin-right: 5px;
    color: var(--warning);
}

.command-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.btn-command {
    padding: 7px 15px;
    background: var(--bg-card2);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.btn-command:hover {
    border-color: var(--primary);
    color: #93c5fd;
    background: rgba(26,115,232,0.1);
}

/* ===== LOG ===== */
.log-container {
    background: #0a0d16;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
    max-height: 250px;
    overflow-y: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.82rem;
}

.log-container::-webkit-scrollbar {
    width: 6px;
}

.log-container::-webkit-scrollbar-track {
    background: transparent;
}

.log-container::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

.log-entry {
    display: flex;
    gap: 12px;
    padding: 4px 0;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    line-height: 1.5;
}

.log-time {
    color: var(--text-muted);
    min-width: 70px;
    font-size: 0.75rem;
}

.log-info    .log-msg { color: #93c5fd; }
.log-success .log-msg { color: #6ee7a0; }
.log-error   .log-msg { color: #fca5a5; }
.log-warning .log-msg { color: #fcd34d; }
.log-sent    .log-msg { color: #c4b5fd; }
.log-recv    .log-msg { color: #fdba74; }

/* ===== CONFIG ===== */
.config-content {
    overflow: hidden;
    transition: var(--transition);
}

.config-content.hidden {
    display: none;
}

/* ===== TOAST ===== */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: #1e3a5f;
    border: 1px solid var(--primary);
    color: var(--text);
    padding: 12px 20px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.88rem;
    box-shadow: 0 8px 25px rgba(0,0,0,0.5);
    transform: translateX(200%);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 999;
}

.toast.show {
    transform: translateX(0);
}

.toast i {
    color: #5dde7a;
    font-size: 1.1rem;
}

/* ===== FOOTER ===== */
.footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-muted);
    font-size: 0.78rem;
    border-top: 1px solid var(--border);
    margin-top: 2rem;
}

.footer i {
    margin-right: 5px;
    color: var(--primary);
}

/* ===== ANIMAÇÕES ===== */
@keyframes pulse-blue {
    0%, 100% { 
        color: var(--primary); 
        text-shadow: 0 0 10px transparent;
    }
    50% { 
        color: #93c5fd; 
        text-shadow: 0 0 10px rgba(26,115,232,0.6);
    }
}

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

.card {
    animation: fadeIn 0.4s ease;
}

/* ===== RESPONSIVO ===== */
@media (max-width: 600px) {
    .header-content h1 { font-size: 1.1rem; }
    .container { padding: 0 1rem; margin: 1rem auto; }
    .card-actions { flex-direction: column; }
    .btn { justify-content: center; }
}