/* --- Design System Variables --- */
:root {
    --bg-dark: #0a0a0c;
    --surface-dark: rgba(20, 20, 22, 0.85);
    --surface-border: rgba(255, 255, 255, 0.08);
    --text-primary: #f3f3f5;
    --text-secondary: #9a9a9f;
    --text-muted: #5e5e64;
    
    /* Muted Grayscale + Purple Accents */
    --accent-primary: #5a4d6c;      /* Muted Slate Purple */
    --accent-secondary: #a8a8af;    /* Slate Gray / Light White */
    --accent-green: #8e8e93;        /* Muted Gray */
    --accent-danger: #b05a6f;       /* Muted Red */
    
    --shadow-glow-purple: 0 0 8px rgba(90, 77, 108, 0.2);
    --shadow-glow-cyan: none;
    --shadow-glow-green: none;
    
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --border-radius-lg: 16px;
    --border-radius-md: 10px;
    --border-radius-sm: 6px;
}

/* --- Global Reset & Scrollbars --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-sans);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    display: flex;
    justify-content: center;
}

::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* --- App Layout --- */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
    max-width: 480px; /* Locked mobile width */
    background: var(--bg-dark);
    position: relative;
    border-left: 1px solid var(--surface-border);
    border-right: 1px solid var(--surface-border);
}

/* --- Header Section --- */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 38px 20px 16px 20px; /* Added padding to clear device status bar stats */
    background: #0f0f12; /* Solid dark color */
    border-bottom: 1px solid var(--surface-border);
    z-index: 10;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-svg {
    width: 24px;
    height: 24px;
    color: var(--text-primary);
    filter: drop-shadow(0 0 3px rgba(255, 255, 255, 0.15));
}

.logo-text h1 {
    font-size: 16px;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--text-primary);
    line-height: 1.1;
}

.logo-text h2 {
    font-size: 9px;
    font-weight: 400;
    letter-spacing: 4px;
    color: var(--accent-secondary);
    text-shadow: var(--shadow-glow-cyan);
}

.header-status {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.05);
    padding: 4px 10px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.03);
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.status-dot.online {
    background-color: var(--accent-green);
    box-shadow: var(--shadow-glow-green);
    animation: pulse 1.5s infinite alternate;
}

.status-dot.offline {
    background-color: var(--accent-danger);
    box-shadow: 0 0 5px var(--accent-danger);
}

.status-label {
    font-size: 10px;
    font-family: var(--font-mono);
    color: var(--text-secondary);
    letter-spacing: 1px;
}

/* --- Visualizer Panel --- */
.visualizer-container {
    background: #070709; /* Solid dark color */
    padding: 12px 16px;
    border-bottom: 1px solid var(--surface-border);
}

.visualizer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.panel-label {
    font-size: 10px;
    font-weight: 800;
    color: var(--text-muted);
    letter-spacing: 1.5px;
}

.visualizer-tabs {
    display: flex;
    gap: 4px;
}

.viz-tab {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 9px;
    font-weight: 700;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.viz-tab.active {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.canvas-wrapper {
    width: 100%;
    height: 80px;
    background: #06070a;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.canvas-wrapper canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* --- Chat Container --- */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 16px;
    background-color: #0b0b0d; /* Solid dark color background */
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.protocol-chip {
    font-family: var(--font-mono);
    font-size: 9px;
    color: var(--accent-primary);
    background: rgba(189, 94, 255, 0.1);
    padding: 2px 8px;
    border-radius: 12px;
    border: 1px solid rgba(189, 94, 255, 0.2);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding-right: 4px;
}

/* --- Message Bubbles --- */
.message {
    display: flex;
    flex-direction: column;
    max-width: 80%;
    animation: slideUp 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28) forwards;
}

.message.sent {
    align-self: flex-end;
}

.message.received {
    align-self: flex-start;
}

.msg-content {
    padding: 12px 16px;
    border-radius: var(--border-radius-lg);
    font-size: 14px;
    line-height: 1.4;
    word-break: break-word;
}

.msg-sender {
    font-size: 10px;
    font-weight: 800;
    color: var(--accent-secondary);
    margin-bottom: 4px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.message.sent .msg-sender {
    color: #dfd8e8;
}

.message.sent .msg-content {
    background: linear-gradient(135deg, var(--accent-primary) 0%, #443654 100%);
    color: #fff;
    border-bottom-right-radius: 4px;
    box-shadow: var(--shadow-glow-purple);
}

.message.received .msg-content {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
    border: 1px solid var(--surface-border);
}

.message.system {
    align-self: center;
    max-width: 90%;
    text-align: center;
}

.message.system .msg-content {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    border-radius: var(--border-radius-md);
    border: 1px dashed rgba(255, 255, 255, 0.1);
    font-size: 13px;
    padding: 16px;
}

.message.system strong {
    display: block;
    font-size: 10px;
    letter-spacing: 2px;
    margin-bottom: 6px;
    color: var(--accent-secondary);
}

.message.system p {
    margin-bottom: 4px;
}

.message.system .subtext {
    font-size: 10px;
    color: var(--text-muted);
}

.msg-time {
    font-size: 9px;
    color: var(--text-muted);
    margin-top: 4px;
    font-family: var(--font-mono);
}

.message.sent .msg-time {
    align-self: flex-end;
}

.message.received .msg-time {
    align-self: flex-start;
}

/* --- Quick Templates --- */
.chips-container {
    display: flex;
    gap: 8px;
    padding: 8px 16px;
    overflow-x: auto;
    white-space: nowrap;
    background: #0b0b0e; /* Solid dark color */
}

.chips-container::-webkit-scrollbar {
    display: none;
}

.msg-chip {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--surface-border);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.msg-chip:active, .msg-chip:hover {
    color: var(--accent-secondary);
    border-color: var(--accent-secondary);
    background: rgba(0, 240, 255, 0.05);
}

/* --- Input Area --- */
.input-container {
    background: #0f0f12; /* Solid dark color */
    border-top: 1px solid var(--surface-border);
    padding: 12px 16px;
}

.input-wrapper {
    display: flex;
    gap: 10px;
    align-items: center;
}

#message-input {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--surface-border);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: 24px;
    font-family: var(--font-sans);
    font-size: 14px;
    outline: none;
    transition: all 0.25s ease;
}

#message-input:focus {
    border-color: var(--accent-primary);
    background: rgba(255, 255, 255, 0.07);
    box-shadow: 0 0 8px rgba(106, 70, 147, 0.15);
}

.send-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary) 0%, #443654 100%);
    border: none;
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-glow-purple);
    transition: all 0.2s ease;
}

.send-btn:disabled {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--surface-border);
    color: var(--text-muted);
    box-shadow: none;
    cursor: not-allowed;
}

.send-icon {
    font-size: 14px;
    transform: rotate(90deg);
}

/* --- Capture Status Bar --- */
.rx-status-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 10px;
    padding-top: 8px;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
}

#rx-state-icon {
    font-size: 14px;
}

#rx-state-text {
    font-size: 11px;
    color: var(--text-muted);
    flex: 1;
    margin-left: 8px;
}

.capture-btn {
    background: transparent;
    border: 1px solid var(--text-secondary);
    color: var(--text-primary);
    font-size: 11px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-shadow: none;
    box-shadow: none;
}

.capture-btn.active {
    background: var(--accent-primary);
    color: #fff;
    box-shadow: var(--shadow-glow-purple);
    text-shadow: none;
}

/* settings svg styles */
.settings-svg {
    width: 20px;
    height: 20px;
    color: var(--text-secondary);
    transition: transform 0.3s ease;
}

.icon-btn:active .settings-svg {
    transform: rotate(45deg);
}

/* --- Icons and Global buttons --- */
.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.icon-btn:active {
    background: rgba(255, 255, 255, 0.05);
}

/* --- Settings Sidebar Menu --- */
.sidebar {
    position: absolute;
    top: 0;
    right: -280px;
    width: 280px;
    height: 100%;
    background: #0b0b0e; /* Solid dark color */
    border-left: 1px solid var(--surface-border);
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s cubic-bezier(0.1, 0.9, 0.2, 1);
    box-shadow: -10px 0 25px rgba(0, 0, 0, 0.5);
}

.sidebar.open {
    transform: translateX(-280px);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px;
    border-bottom: 1px solid var(--surface-border);
}

.sidebar-header h3 {
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 1.5px;
    color: var(--accent-primary);
}

.close-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.settings-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.settings-group label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
}

.settings-group select {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--surface-border);
    color: var(--text-primary);
    padding: 10px;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-sans);
    font-size: 13px;
    outline: none;
}

.settings-group select option {
    background-color: #0b0b0e;
    color: var(--text-primary);
}

.settings-group input[type="text"],
.settings-group input[type="password"],
.settings-group textarea {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--surface-border);
    color: var(--text-primary);
    padding: 10px;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-sans);
    font-size: 13px;
    outline: none;
    width: 100%;
    box-sizing: border-box;
}

.settings-group input[type="text"]:focus,
.settings-group input[type="password"]:focus,
.settings-group textarea:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 8px rgba(90, 77, 108, 0.15);
}

.settings-group h4 {
    font-size: 11px;
    font-weight: 800;
    color: var(--accent-secondary);
    letter-spacing: 1px;
    margin: 8px 0 4px 0;
}

.help-text {
    font-size: 10px;
    color: var(--text-muted);
    line-height: 1.4;
}

.toggle-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.toggle-row label {
    font-size: 12px;
}

/* Custom inputs styling */
input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-primary);
    box-shadow: var(--shadow-glow-purple);
    cursor: pointer;
    transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:active {
    transform: scale(1.2);
}

.settings-divider {
    height: 1px;
    background: var(--surface-border);
    margin: 10px 0;
}

.diag-desc {
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.action-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--surface-border);
    color: var(--text-primary);
    padding: 10px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    font-family: var(--font-sans);
    transition: all 0.2s ease;
}

.action-btn:active {
    background: var(--accent-primary);
    color: #fff;
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow-purple);
}

.action-btn.danger {
    color: var(--accent-danger);
    border-color: rgba(255, 0, 85, 0.2);
}

.action-btn.danger:active {
    background: var(--accent-danger);
    color: #fff;
    border-color: var(--accent-danger);
    box-shadow: 0 0 10px rgba(255, 0, 85, 0.3);
}

.test-result {
    font-family: var(--font-mono);
    font-size: 10px;
    padding: 8px;
    border-radius: var(--border-radius-sm);
    background: #000;
    color: var(--text-secondary);
    min-height: 40px;
    max-height: 100px;
    overflow-y: auto;
    white-space: pre-wrap;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* --- Overlay --- */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 95;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.overlay.visible {
    opacity: 1;
    pointer-events: auto;
}

/* --- Animations --- */
@keyframes pulse {
    0% {
        box-shadow: 0 0 2px rgba(57, 255, 20, 0.2);
    }
    100% {
        box-shadow: 0 0 12px rgba(57, 255, 20, 0.6);
    }
}

@keyframes slideUp {
    0% {
        opacity: 0;
        transform: translateY(15px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.tx-wave-wrapper {
    width: 100%;
    height: 48px;
    background: #000;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--surface-border);
    margin: 8px 0;
    overflow: hidden;
    position: relative;
}

.tx-wave-wrapper canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.hidden {
    display: none !important;
}

.settings-attribution {
    margin-top: 24px;
    padding: 12px 0;
    text-align: center;
    font-size: 10px;
    color: var(--text-muted);
    line-height: 1.5;
}

.settings-attribution p {
    margin: 4px 0;
}