/* =========================================================================
   AIRODUMP COSMIC FUTURISTIC DESIGN SYSTEM
   Inspired by Cyberpunk Grid & Vibrant Gradient Typography
   ========================================================================= */

:root {
    --bg-dark: #06070a;
    --bg-surface: rgba(12, 15, 23, 0.75);
    --bg-surface-hover: rgba(20, 25, 38, 0.9);
    --bg-card: rgba(16, 20, 31, 0.75);
    
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.22);
    --border-glow: rgba(0, 198, 255, 0.4);
    
    --pink-gradient: linear-gradient(135deg, #ff3366 0%, #cb52f8 100%);
    --cyan-gradient: linear-gradient(135deg, #00c6ff 0%, #0072ff 100%);
    --primary-gradient: linear-gradient(135deg, #00c6ff 0%, #7928ca 100%);
    
    --accent-pink: #ff3366;
    --accent-cyan: #00c6ff;
    --accent-blue: #0072ff;
    --accent-emerald: #10b981;
    
    --primary-glow: rgba(0, 198, 255, 0.35);
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-sans);
    -webkit-font-smoothing: antialiased;
}

html, body {
    width: 100%;
    max-width: 100vw;
    min-height: 100vh;
    background-color: var(--bg-dark);
    color: var(--text-main);
    overflow-x: hidden;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 24px 16px;
    position: relative;
}

/* =========================================================================
   BACKGROUND LIGHTING, STAR SPARKLES & GRID TEXTURE
   ========================================================================= */

.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image: 
        radial-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px),
        linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 32px 32px, 64px 64px, 64px 64px;
    pointer-events: none;
    z-index: 0;
    opacity: 0.85;
}

.star-sparkle {
    position: fixed;
    color: rgba(255, 255, 255, 0.6);
    font-size: 1rem;
    pointer-events: none;
    z-index: 0;
    animation: sparkleTwinkle 3s infinite ease-in-out alternate;
}

.s-1 { top: 15%; left: 12%; animation-delay: 0s; }
.s-2 { top: 25%; right: 15%; animation-delay: 1s; font-size: 1.2rem; color: rgba(0, 198, 255, 0.7); }
.s-3 { bottom: 20%; left: 18%; animation-delay: 1.5s; color: rgba(255, 51, 102, 0.7); }
.s-4 { bottom: 15%; right: 12%; animation-delay: 0.5s; }

@keyframes sparkleTwinkle {
    0% { opacity: 0.2; transform: scale(0.8); }
    100% { opacity: 0.9; transform: scale(1.2); filter: drop-shadow(0 0 6px currentColor); }
}

.ambient-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(140px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.4;
}

.glow-pink {
    width: 480px;
    height: 480px;
    background: radial-gradient(circle, #ff3366 0%, rgba(255, 51, 102, 0) 70%);
    top: -120px;
    left: 20%;
}

.glow-cyan {
    width: 520px;
    height: 520px;
    background: radial-gradient(circle, #00c6ff 0%, rgba(0, 114, 255, 0) 70%);
    bottom: -150px;
    right: 15%;
}

.glow-violet {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #7928ca 0%, rgba(121, 40, 202, 0) 70%);
    top: 40%;
    left: -100px;
}

/* =========================================================================
   APP LAYOUT CONTAINER
   ========================================================================= */

.app-layout {
    width: 100%;
    max-width: 860px;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    z-index: 10;
    overflow: hidden;
}

/* Navbar */
.nav-bar {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 22px;
    background: rgba(12, 15, 23, 0.45);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-subtle);
    border-radius: 100px;
}

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

.brand-logo {
    width: 32px;
    height: 32px;
    border-radius: 10px;
    background: var(--cyan-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: 0 0 16px var(--primary-glow);
}

.brand-name {
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--text-main);
}

.nav-badges {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.pulse-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--accent-emerald);
    box-shadow: 0 0 8px var(--accent-emerald);
    animation: pulseGlow 2s infinite ease-in-out;
}

@keyframes pulseGlow {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.85); }
}

/* =========================================================================
   GLASS CARD CONTAINER
   ========================================================================= */

.glass-container {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    background: var(--bg-surface);
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 38px;
    box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(255, 255, 255, 0.04) inset;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
    box-sizing: border-box;
}

.glass-container.wide {
    max-width: 860px;
}

/* Section visibility */
.section {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.section.active {
    display: block;
    opacity: 1;
    animation: fadeInSlide 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeInSlide {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.hidden {
    display: none !important;
}

/* =========================================================================
   HERO HEADER & GRADIENT TYPOGRAPHY
   ========================================================================= */

.hero-header {
    text-align: center;
    margin-bottom: 34px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.chevron-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
    border-radius: 100px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--accent-cyan);
    margin-bottom: 12px;
}

.chevrons {
    font-weight: 800;
    color: var(--accent-pink);
    letter-spacing: -2px;
}

.hero-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}

.gradient-pink-purple {
    background: var(--pink-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.gradient-blue-cyan {
    background: var(--cyan-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 25px rgba(0, 198, 255, 0.3));
}

.hero-header p {
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* =========================================================================
   CARDS & CONNECTION GRID
   ========================================================================= */

.connection-card-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 20px;
    align-items: center;
}

.action-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: border-color 0.25s, box-shadow 0.25s;
}

.action-card:hover {
    border-color: var(--border-hover);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 14px;
}

.card-icon-wrap {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-subtle);
}

.icon-zap {
    background: rgba(255, 51, 102, 0.12);
    border-color: rgba(255, 51, 102, 0.3);
    color: var(--accent-pink);
}

.icon-link {
    background: rgba(0, 198, 255, 0.12);
    border-color: rgba(0, 198, 255, 0.3);
    color: var(--accent-cyan);
}

.card-header h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
}

.card-header p {
    font-size: 0.8rem;
    color: var(--text-dim);
}

/* Buttons */
.btn {
    width: 100%;
    padding: 14px 20px;
    border-radius: var(--radius-md);
    font-size: 0.92rem;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
    outline: none;
}

.primary-glow-btn {
    background: var(--cyan-gradient);
    color: #ffffff;
    box-shadow: 0 4px 20px var(--primary-glow);
}

.primary-glow-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 26px rgba(0, 198, 255, 0.5);
}

.primary-glow-btn:active:not(:disabled) {
    transform: translateY(0);
}

.primary-glow-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    box-shadow: none;
}

.secondary-glow-btn {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-main);
    border: 1px solid var(--border-subtle);
}

.secondary-glow-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--border-hover);
}

.tertiary-btn {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-subtle);
}

.tertiary-btn:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

/* Divider */
.divider {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dim);
    font-size: 0.75rem;
    font-weight: 700;
    position: relative;
    height: 100%;
}

.divider span {
    background: rgba(12, 15, 23, 0.9);
    padding: 6px 12px;
    border-radius: 100px;
    border: 1px solid var(--border-subtle);
}

/* Room Code Panel */
.created-code-panel {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 8px;
    animation: fadeInSlide 0.3s ease;
}

.panel-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
}

.code-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-md);
    padding: 10px 16px;
    box-shadow: 0 0 16px rgba(0, 198, 255, 0.15);
}

#generated-code {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--accent-cyan);
}

.copy-action-btn {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-subtle);
    color: var(--text-main);
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.copy-action-btn:hover {
    background: rgba(255, 255, 255, 0.18);
    color: #fff;
}

.qr-code-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 14px;
    background: rgba(0, 0, 0, 0.35);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
}

.qr-canvas {
    border-radius: 8px;
    background: #ffffff;
    padding: 6px;
}

.qr-hint {
    font-size: 0.72rem;
    color: var(--text-dim);
}

/* Join input row */
.input-action-row {
    display: flex;
    gap: 10px;
}

.input-action-buttons {
    display: flex;
    gap: 10px;
}

input[type="text"] {
    width: 100%;
    padding: 14px 16px;
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-family: var(--font-mono);
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: 2px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

#room-input {
    cursor: pointer;
}

input[type="text"]:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(0, 198, 255, 0.25);
}

.status-banner {
    margin-top: 20px;
    text-align: center;
    font-size: 0.88rem;
    color: var(--text-muted);
    min-height: 24px;
}

/* =========================================================================
   CONNECTED & TRANSFER SECTION
   ========================================================================= */

.transfer-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-subtle);
}

.connection-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--accent-emerald);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--accent-emerald);
    box-shadow: 0 0 10px var(--accent-emerald);
}

.icon-button {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    color: var(--text-muted);
    padding: 8px 14px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.icon-button:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--border-hover);
}

/* Transfer 2-Column Grid */
.transfer-grid {
    display: grid;
    grid-template-columns: 1fr 240px;
    gap: 24px;
    align-items: start;
    width: 100%;
    min-width: 0;
    max-width: 100%;
}

.transfer-left-col {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
    min-width: 0;
    max-width: 100%;
}

/* Upload Area */
.file-upload-wrapper {
    position: relative;
    width: 100%;
    min-width: 0;
    max-width: 100%;
}

.file-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 10;
}

.upload-area {
    border: 2px dashed rgba(255, 255, 255, 0.14);
    border-radius: var(--radius-lg);
    padding: 36px 20px;
    text-align: center;
    background: rgba(0, 0, 0, 0.3);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    overflow: hidden;
    box-sizing: border-box;
}

.file-upload-wrapper:hover .upload-area {
    border-color: var(--accent-cyan);
    background: rgba(0, 198, 255, 0.05);
}

.file-input:focus + .upload-area {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(0, 198, 255, 0.2);
}

.upload-icon-circle {
    width: 54px;
    height: 54px;
    border-radius: 50%;
    background: rgba(0, 198, 255, 0.1);
    border: 1px solid rgba(0, 198, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    transition: transform 0.3s ease;
}

.file-upload-wrapper:hover .upload-icon-circle {
    transform: translateY(-3px) scale(1.05);
    background: rgba(0, 198, 255, 0.2);
}

.upload-prompt .main-prompt {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-main);
}

.upload-prompt .main-prompt span {
    color: var(--accent-cyan);
    text-decoration: underline;
}

.upload-prompt .sub-prompt {
    font-size: 0.78rem;
    color: var(--text-dim);
    margin-top: 4px;
}

.file-name-badge {
    margin-top: 4px;
    padding: 8px 14px;
    background: rgba(0, 198, 255, 0.12);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-size: 0.85rem;
    font-weight: 500;
    word-break: break-all;
    display: none;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: normal;
    box-sizing: border-box;
}

.file-name-badge svg {
    vertical-align: middle;
    margin-right: 6px;
    color: var(--accent-cyan);
}

/* Progress Bar Panel */
.progress-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    animation: fadeInSlide 0.3s ease;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

.progress-title {
    color: var(--text-muted);
}

.progress-num {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--accent-cyan);
}

.progress-track {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 100px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: var(--cyan-gradient);
    border-radius: 100px;
    transition: width 0.15s linear;
    box-shadow: 0 0 10px var(--primary-glow);
}

/* Downloads Panel */
.download-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    animation: fadeInSlide 0.35s ease;
}

.download-header-row {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-emerald);
}

.download-icon-wrap {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(16, 185, 129, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-emerald);
}

.download-items-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: 220px;
    overflow-y: auto;
}

.download-item-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.88rem;
    transition: all 0.2s ease;
}

.download-item-btn:hover {
    background: rgba(0, 198, 255, 0.15);
    border-color: var(--border-glow);
}

.file-item-label {
    display: flex;
    align-items: center;
    gap: 8px;
}

.dl-btn-text {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-cyan);
    font-weight: 600;
    font-size: 0.82rem;
}

/* Transfer Right Controls */
.transfer-right-col {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* =========================================================================
   FOOTER
   ========================================================================= */

.app-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 12px 8px;
    font-size: 0.78rem;
    color: var(--text-dim);
}

.footer-link {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: var(--text-main);
}

/* =========================================================================
   RESPONSIVE LAYOUT (MOBILE & TABLETS)
   ========================================================================= */

@media (max-width: 768px) {
    body {
        padding: 12px 8px;
    }

    .app-layout {
        gap: 14px;
        width: 100%;
        max-width: 100%;
    }

    .glass-container {
        padding: 20px 14px;
        border-radius: var(--radius-lg);
        width: 100%;
        max-width: 100%;
        overflow: hidden;
    }

    .hero-header h2 {
        font-size: 1.85rem;
    }

    .hero-header p {
        font-size: 0.85rem;
    }

    .connection-card-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .divider {
        height: auto;
        padding: 4px 0;
    }

    .divider::before, .divider::after {
        content: '';
        flex: 1;
        border-bottom: 1px solid var(--border-subtle);
    }

    .transfer-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        width: 100%;
        min-width: 0;
    }

    .transfer-left-col,
    .transfer-right-col {
        width: 100%;
        min-width: 0;
    }

    .upload-area {
        padding: 24px 14px;
    }

    .btn {
        min-height: 48px;
        font-size: 0.95rem;
    }

    input[type="text"] {
        min-height: 48px;
    }

    .input-action-row {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }

    #room-input {
        width: 100%;
        text-align: center;
        font-size: 1.25rem;
        letter-spacing: 6px;
        height: 52px;
        padding: 0 16px;
    }

    .input-action-buttons {
        display: flex;
        gap: 10px;
        width: 100%;
    }

    .input-action-buttons .btn {
        flex: 1;
        justify-content: center;
        height: 48px;
    }
}

/* =========================================================================
   CAMERA SCANNER MODAL & SCAN BUTTON STYLES
   ========================================================================= */

.scan-glow-btn {
    background: rgba(0, 198, 255, 0.1);
    color: var(--accent-cyan);
    border: 1px solid rgba(0, 198, 255, 0.3);
    border-radius: var(--radius-md);
    padding: 0 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.scan-glow-btn:hover {
    background: rgba(0, 198, 255, 0.2);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 18px rgba(0, 198, 255, 0.3);
    transform: translateY(-1px);
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(6, 7, 10, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
    display: none;
    opacity: 0;
    pointer-events: none;
}

.scanner-modal-card {
    width: 100%;
    max-width: 440px;
    background: rgba(14, 19, 31, 0.95);
    border: 1px solid rgba(0, 198, 255, 0.25);
    border-radius: var(--radius-xl);
    padding: 24px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.9), 0 0 30px rgba(0, 198, 255, 0.15);
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.scanner-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.scanner-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
}

.scanner-viewfinder {
    position: relative;
    width: 100%;
    height: 280px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #000;
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
}

.scanner-viewfinder video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.scan-laser {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, transparent, #00c6ff, #ff3366, transparent);
    box-shadow: 0 0 12px #00c6ff;
    animation: scanAnimation 2s infinite ease-in-out;
    z-index: 10;
}

@keyframes scanAnimation {
    0% { top: 5%; opacity: 0.2; }
    50% { top: 92%; opacity: 1; }
    100% { top: 5%; opacity: 0.2; }
}

.reticle-corner {
    position: absolute;
    width: 24px;
    height: 24px;
    border-color: #00c6ff;
    border-style: solid;
    z-index: 10;
}

.reticle-corner.top-left { top: 16px; left: 16px; border-width: 3px 0 0 3px; border-top-left-radius: 6px; }
.reticle-corner.top-right { top: 16px; right: 16px; border-width: 3px 3px 0 0; border-top-right-radius: 6px; }
.reticle-corner.bottom-left { bottom: 16px; left: 16px; border-width: 0 0 3px 3px; border-bottom-left-radius: 6px; }
.reticle-corner.bottom-right { bottom: 16px; right: 16px; border-width: 0 3px 3px 0; border-bottom-right-radius: 6px; }

.scanner-status-text {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
}

/* =========================================================================
   4-CHARACTER CODE ENTRY POP-UP MODAL STYLES
   ========================================================================= */

.code-modal-card {
    width: 100%;
    max-width: 420px;
    background: rgba(14, 19, 31, 0.95);
    border: 1px solid rgba(0, 198, 255, 0.3);
    border-radius: var(--radius-xl);
    padding: 26px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.9), 0 0 35px rgba(0, 198, 255, 0.2);
    display: flex;
    flex-direction: column;
    gap: 20px;
    animation: modalPopIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes modalPopIn {
    from { opacity: 0; transform: scale(0.92) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.code-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-icon-badge {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: rgba(0, 198, 255, 0.12);
    border: 1px solid rgba(0, 198, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

.code-modal-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-main);
}

.code-modal-body {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
    width: 100%;
}

.code-modal-subtext {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
}

.pin-inputs-container {
    display: flex;
    gap: 12px;
    justify-content: center;
    width: 100%;
    margin: 8px 0;
}

.pin-box {
    width: 58px;
    height: 64px;
    background: rgba(0, 0, 0, 0.55);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent-cyan);
    text-align: center;
    text-transform: uppercase;
    outline: none;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.pin-box:focus {
    border-color: var(--accent-cyan);
    background: rgba(0, 198, 255, 0.08);
    box-shadow: 0 0 20px rgba(0, 198, 255, 0.35), 0 0 0 3px rgba(0, 198, 255, 0.2);
    transform: translateY(-2px);
}

.pin-box.filled {
    border-color: rgba(0, 198, 255, 0.5);
    color: #ffffff;
    background: rgba(0, 198, 255, 0.12);
}

/* =========================================================================
   REAL-TIME PERFORMANCE CARD STYLES
   ========================================================================= */

.progress-panel {
    background: rgba(14, 18, 28, 0.65);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.perf-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.file-direction-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    background: rgba(0, 198, 255, 0.1);
    border: 1px solid rgba(0, 198, 255, 0.25);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent-cyan);
    letter-spacing: 0.5px;
}

.direction-icon {
    font-size: 0.9rem;
    line-height: 1;
    animation: bounceDir 1.5s infinite ease-in-out;
}

@keyframes bounceDir {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-2px); }
}

.perf-conn-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
}

.perf-conn-pill.direct {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--accent-emerald);
}

.perf-conn-pill.relay {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #f59e0b;
}

.conn-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 6px currentColor;
}

.perf-file-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.perf-file-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    flex-shrink: 0;
}

.perf-file-meta {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
}

.perf-file-name {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-main);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.perf-file-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.cancel-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    background: rgba(255, 51, 102, 0.1);
    border: 1px solid rgba(255, 51, 102, 0.3);
    border-radius: 8px;
    color: #ff3366;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.cancel-btn:hover {
    background: rgba(255, 51, 102, 0.2);
    box-shadow: 0 0 12px rgba(255, 51, 102, 0.3);
}

.perf-bar-wrapper {
    display: flex;
    align-items: center;
    gap: 16px;
}

.perf-large-percent {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--accent-cyan);
    min-width: 60px;
    text-align: right;
}

.perf-metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    background: rgba(8, 10, 15, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-md);
    padding: 12px;
}

.metric-box {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.metric-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.metric-val {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-main);
}

.metric-val.highlight {
    color: var(--accent-cyan);
}

.metric-sub {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--text-muted);
}

.perf-graph-container {
    width: 100%;
    height: 50px;
    background: rgba(6, 8, 12, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.perf-graph-container canvas {
    width: 100%;
    height: 100%;
    display: block;
}

@media (max-width: 600px) {
    .progress-panel {
        padding: 16px 12px;
    }

    .perf-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
        padding: 10px 8px;
    }

    .metric-box {
        min-width: 0;
        overflow: hidden;
    }

    .metric-val {
        font-size: 0.76rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .metric-label {
        font-size: 0.64rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .metric-sub {
        font-size: 0.65rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .pin-box {
        width: 48px;
        height: 56px;
        font-size: 1.35rem;
    }

    .perf-large-percent {
        font-size: 1rem;
        min-width: 48px;
    }

    .transfer-header-bar {
        margin-bottom: 16px;
        padding-bottom: 12px;
    }
}