/* ========================================
   Role Selection Screen
   ======================================== */

.role-card {
    padding: var(--space-xl);
    text-align: center;
}

.role-card h2 {
    margin-bottom: var(--space-xl);
    font-size: var(--font-size-xl);
}

.role-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.role-btn {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: left;
}

.role-btn:hover {
    border-color: var(--color-primary);
    background: var(--color-surface-hover);
    transform: translateX(4px);
}

.role-btn:focus-visible {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-muted);
}

.role-icon {
    flex-shrink: 0;
    color: var(--color-primary);
    width: 48px;
    height: 48px;
}

.role-title {
    display: block;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.role-desc {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* ========================================
   Host Screen
   ======================================== */

.host-card {
    padding: var(--space-xl);
    max-width: 420px;
    margin: 0 auto;
    width: 100%;
}

.host-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.host-header h2 {
    flex: 1;
    text-align: center;
}

.room-status {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-bg);
    border-radius: var(--radius-full);
}

.pin-display {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.pin-label {
    display: block;
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.pin-code {
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Mono', monospace;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    letter-spacing: 0.4em;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
    word-break: break-all;
}

.qr-section {
    text-align: center;
}

.qr-label {
    display: block;
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.qr-container {
    display: inline-block;
    padding: var(--space-md);
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--glass-shadow);
    margin-bottom: var(--space-md);
}

.qr-container img {
    display: block;
    width: 200px;
    height: 200px;
}

.qr-url {
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Mono', monospace;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    word-break: break-all;
    max-width: 100%;
}

.peer-info {
    padding: var(--space-md);
    background: var(--color-primary-muted);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-md);
    animation: slideIn var(--transition-normal);
}

.peer-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-primary-text);
}

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

/* ========================================
   Peer Screen
   ======================================== */

.peer-card {
    padding: var(--space-xl);
    max-width: 420px;
    margin: 0 auto;
    width: 100%;
}

.peer-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.peer-header h2 {
    flex: 1;
    text-align: center;
}

.method-tabs {
    display: flex;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: 4px;
    margin-bottom: var(--space-lg);
}

.tab-btn {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    color: var(--color-text);
}

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

.tab-panels {
    position: relative;
}

.tab-panel {
    display: none;
    animation: fadeIn var(--transition-fast);
}

.tab-panel.active {
    display: block;
}

.pin-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.pin-input-group {
    position: relative;
}

#pin-input {
    text-align: center;
    letter-spacing: 0.5em;
    font-size: var(--font-size-xl);
    font-weight: 600;
    padding: var(--space-lg) var(--space-md);
}

.error-message {
    font-size: var(--font-size-sm);
    color: var(--color-danger);
    text-align: center;
    min-height: 20px;
}

/* QR Scanner */
.qr-scanner {
    text-align: center;
}

.scanner-viewport {
    position: relative;
    width: 100%;
    max-width: 320px;
    aspect-ratio: 1;
    margin: 0 auto var(--space-md);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg);
    border: 2px solid var(--color-border);
}

.scanner-viewport video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: rotateY(180deg);
}

.scanner-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.scanner-frame {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 70%;
    height: 70%;
    max-width: 200px;
    max-height: 200px;
    transform: translate(-50%, -50%);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.5);
    animation: scanLine 2s linear infinite;
}

.scanner-frame::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
    box-shadow: 0 0 10px var(--color-primary);
    animation: scanLineMove 2s linear infinite;
}

@keyframes scanLineMove {
    0% { top: 0; opacity: 1; }
    100% { top: 100%; opacity: 0; }
}

.scanner-hint {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* ========================================
   Transfer Screens
   ======================================== */

.transfer-card {
    padding: var(--space-xl);
    max-width: 420px;
    margin: 0 auto;
    width: 100%;
}

.transfer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-xl);
}

.transfer-header h2 {
    font-size: var(--font-size-xl);
}

.connection-status {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Drop Zone */
.drop-zone {
    position: relative;
    padding: var(--space-2xl) var(--space-lg);
    text-align: center;
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--color-primary);
    background: var(--color-primary-muted);
}

.drop-zone:focus-visible {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-muted);
}

.drop-icon {
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    transition: color var(--transition-fast);
}

.drop-zone:hover .drop-icon,
.drop-zone.drag-over .drop-icon {
    color: var(--color-primary);
}

.drop-text {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.drop-hint {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Transfer List */
.transfer-list {
    margin-top: var(--space-xl);
}

.transfer-list h3 {
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

#transfer-items,
#receive-items {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

/* Transfer Item */
.transfer-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    animation: slideIn var(--transition-normal);
}

.transfer-item.completed {
    border-color: var(--color-success);
}

.transfer-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    color: var(--color-primary);
}

.transfer-info {
    flex: 1;
    min-width: 0;
}

.transfer-filename {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: var(--space-xs);
}

.transfer-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.transfer-progress {
    flex: 1;
    height: 4px;
    background: var(--color-bg);
    border-radius: var(--radius-full);
    overflow: hidden;
    min-width: 60px;
}

.transfer-progress-bar {
    height: 100%;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-fast);
    width: 0%;
}

.transfer-speed {
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

.transfer-actions {
    flex-shrink: 0;
}

.btn-transfer-cancel {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    background: var(--color-danger-muted);
    border: none;
    border-radius: var(--radius-sm);
    color: var(--color-danger);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* Receive Status */
.receive-status {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
}

.status-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-lg);
    transition: all var(--transition-normal);
}

.status-icon.waiting {
    background: var(--color-primary-muted);
    color: var(--color-primary);
}

.status-icon.receiving {
    background: var(--color-secondary-muted);
    color: var(--color-secondary);
    animation: pulse-ring 2s ease-out infinite;
}

.status-icon.complete {
    background: var(--color-success);
    color: white;
}

@keyframes pulse-ring {
    0% { box-shadow: 0 0 0 0 var(--color-secondary); }
    70% { box-shadow: 0 0 0 20px transparent; }
    100% { box-shadow: 0 0 0 0 transparent; }
}

.receive-status h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-xs);
}

.receive-status p {
    color: var(--color-text-muted);
}

.receive-list {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.receive-list h3 {
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

/* ========================================
   Progress Modal
   ======================================== */

.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    z-index: var(--z-modal);
    animation: fadeIn var(--transition-fast);
}

.modal-content {
    width: 100%;
    max-width: 400px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow);
    overflow: hidden;
    animation: slideUp var(--transition-normal);
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
    font-size: var(--font-size-lg);
}

.modal-body {
    padding: var(--space-lg);
}

.progress-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.progress-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}

.progress-filename {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}

.progress-stats {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    white-space: nowrap;
}

#progress-percent {
    font-variant-numeric: tabular-nums;
    font-weight: 600;
    color: var(--color-primary);
    min-width: 45px;
}

#progress-speed {
    font-variant-numeric: tabular-nums;
    min-width: 80px;
}

.progress-bar-container {
    height: 8px;
    background: var(--color-bg);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-fast);
    width: 0%;
}

.progress-actions {
    display: flex;
    justify-content: flex-end;
    padding-top: var(--space-sm);
}

/* ========================================
   Toast Notifications
   ======================================== */

.toast-container {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    z-index: var(--z-toast);
    max-width: 360px;
}

.toast {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--glass-shadow);
    animation: slideInRight var(--transition-normal);
}

.toast.removing {
    animation: slideOutRight var(--transition-fast) forwards;
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(100%); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideOutRight {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(100%); }
}

.toast-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
}

.toast-success .toast-icon {
    background: rgba(34, 197, 94, 0.2);
    color: var(--color-success);
}

.toast-error .toast-icon {
    background: rgba(239, 68, 68, 0.2);
    color: var(--color-danger);
}

.toast-info .toast-icon {
    background: rgba(99, 102, 241, 0.2);
    color: var(--color-secondary);
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 2px;
}

.toast-message {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.toast-close {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.toast-close:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

/* ========================================
   File Type Icons
   ======================================== */

.file-icon {
    width: 24px;
    height: 24px;
    stroke-width: 2;
}

/* ========================================
   Responsive Components
   ======================================== */

@media (max-width: 480px) {
    .role-btn {
        padding: var(--space-md);
    }
    
    .role-icon {
        width: 40px;
        height: 40px;
    }
    
    .pin-code {
        font-size: var(--font-size-2xl);
        letter-spacing: 0.2em;
    }
    
    .qr-container img {
        width: 180px;
        height: 180px;
    }
    
    .transfer-item {
        flex-wrap: wrap;
    }
    
    .transfer-progress {
        order: 3;
        width: 100%;
        min-width: 0;
    }
    
    .transfer-actions {
        order: 4;
    }
    
    .progress-info {
        flex-wrap: wrap;
    }
    
    .progress-stats {
        width: 100%;
        justify-content: space-between;
    }
}