:root {
    --bg-main: #0b0f19;
    --bg-card: rgba(18, 26, 43, 0.7);
    --bg-card-hover: rgba(28, 39, 64, 0.8);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(255, 255, 255, 0.15);
    
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --primary-glow: rgba(59, 130, 246, 0.3);
    
    --online-color: #10b981;
    --offline-color: #6b7280;
    --danger-color: #ef4444;
    
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --text-dim: #6b7280;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-main);
    background-image: 
        radial-gradient(circle at 15% 15%, rgba(59, 130, 246, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 85% 85%, rgba(139, 92, 246, 0.1) 0%, transparent 40%);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Glassmorphism Cards */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

/* Views */
.view {
    display: none;
    min-height: 100vh;
}

.view.active {
    display: flex;
    flex-direction: column;
}

/* Login View */
#login-view {
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    width: 100%;
    max-width: 420px;
    padding: 40px 32px;
    text-align: center;
}

.brand-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 8px;
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--primary);
}

.login-card h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

.login-card .subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 28px;
}

.input-group {
    position: relative;
    margin-bottom: 16px;
}

.input-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-muted);
}

.input-group input {
    width: 100%;
    padding: 14px 14px 14px 44px;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

.input-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.error-msg {
    color: var(--danger-color);
    font-size: 0.85rem;
    margin-bottom: 16px;
    min-height: 20px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--border-highlight);
}

.btn-block {
    width: 100%;
}

.btn-icon {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.12);
    color: white;
}

.btn-icon:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-icon.btn-danger:hover {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
    border-color: rgba(239, 68, 68, 0.4);
}

/* Header */
.app-header {
    height: 64px;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(11, 15, 25, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.app-name {
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.5px;
}

.device-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

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

.status-dot.offline {
    background: var(--offline-color);
    box-shadow: none;
}

.search-box {
    position: relative;
    width: 320px;
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    padding: 8px 12px 8px 36px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    color: var(--text-main);
    font-size: 0.85rem;
    outline: none;
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--primary);
}

/* App Content */
.app-content {
    flex: 1;
    padding: 32px 24px;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
}

/* Seletor de Dispositivos */
.section-header {
    margin-bottom: 24px;
}

.section-header h2 {
    font-size: 1.4rem;
    font-weight: 600;
}

.section-header p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 4px;
}

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

.device-card {
    padding: 24px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.device-card:hover:not(.offline) {
    transform: translateY(-4px);
    background: var(--bg-card-hover);
    border-color: var(--border-highlight);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.4);
}

.device-card.offline {
    opacity: 0.55;
    cursor: not-allowed;
    filter: grayscale(40%);
}

.device-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.device-os-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.device-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.device-ip {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-family: monospace;
}

/* Explorador Navbar */
.explorer-nav-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(18, 26, 43, 0.5);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    font-size: 0.9rem;
}

.crumb-item {
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: var(--transition);
}

.crumb-item:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.08);
}

.crumb-item.active {
    color: var(--text-main);
    font-weight: 600;
}

.crumb-sep {
    color: var(--text-dim);
}

/* Files Container */
.files-container {
    min-height: 400px;
    position: relative;
}

/* Grid View */
.view-grid {
    display: grid;
    /* Largura FIXA de coluna (nao minmax(...,1fr)) -- com poucos itens na
       pasta, "1fr" fazia cada card esticar pra preencher a linha toda,
       deixando os icones desproporcionalmente grandes. Com coluna fixa,
       cada item mantem sempre o mesmo tamanho, sobrando espaco vazio no
       final da linha quando tem poucos arquivos (igual Explorer/Finder). */
    grid-template-columns: repeat(auto-fill, 130px);
    justify-content: start;
    /* Idem no eixo vertical: sem isso, quando so cabe 1 linha de itens, o
       "min-height: 400px" do .files-container fazia essa unica linha
       esticar pra preencher o espaco vazio embaixo -- cards de pasta
       ficavam gigantes e esticados verticalmente. */
    align-content: start;
    align-items: start;
    gap: 16px;
}

.file-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
}

.file-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-highlight);
    transform: translateY(-2px);
}

.file-item.selected {
    background: rgba(59, 130, 246, 0.2);
    border-color: var(--primary);
}

.file-icon-box {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
    position: relative;
}

.file-icon-box i {
    width: 40px;
    height: 40px;
    color: var(--text-muted);
}

.file-item.is-dir .file-icon-box i {
    color: #f59e0b; /* Folder Yellow */
}

.file-item.is-drive {
    background: rgba(59, 130, 246, 0.08);
    border-color: rgba(59, 130, 246, 0.3);
}

.file-item.is-drive:hover {
    background: rgba(59, 130, 246, 0.16);
    border-color: var(--primary);
    box-shadow: 0 4px 16px var(--primary-glow);
}

.file-item.is-drive .file-icon-box i {
    color: var(--primary);
}

.thumb-img {
    width: 64px;
    height: 64px;
    object-fit: cover;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.file-name {
    font-size: 0.82rem;
    font-weight: 400;
    color: var(--text-main);
    width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-meta {
    font-size: 0.72rem;
    color: var(--text-dim);
    margin-top: 2px;
}

/* Drop Overlay */
.drop-overlay {
    display: none;
    position: absolute;
    inset: 0;
    background: rgba(11, 15, 25, 0.9);
    backdrop-filter: blur(8px);
    border: 2px dashed var(--primary);
    border-radius: var(--radius-lg);
    z-index: 100;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.drop-overlay.active {
    display: flex;
}

/* Context Menu */
.context-menu {
    display: none;
    position: fixed;
    z-index: 1000;
    background: rgba(18, 26, 43, 0.95);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    min-width: 180px;
    padding: 6px;
}

.context-menu.active {
    display: block;
}

.context-menu ul {
    list-style: none;
}

.context-menu li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.context-menu li:hover {
    background: rgba(255, 255, 255, 0.1);
}

.context-menu li.danger {
    color: var(--danger-color);
}

.context-menu li.danger:hover {
    background: rgba(239, 68, 68, 0.15);
}

/* Modal Overlay */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
}

.modal-card {
    width: 100%;
    max-width: 480px;
    padding: 24px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}

/* View em Lista (alternativa ao grid de icones) */
.view-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.view-list .file-item {
    flex-direction: row;
    align-items: center;
    text-align: left;
    padding: 8px 14px;
    gap: 14px;
}

.view-list .file-icon-box {
    width: 32px;
    height: 32px;
    margin-bottom: 0;
    flex-shrink: 0;
}

.view-list .file-icon-box i {
    width: 22px;
    height: 22px;
}

.view-list .thumb-img {
    width: 32px;
    height: 32px;
}

.view-list .file-name {
    flex: 1;
    width: auto;
}

.view-list .file-meta {
    margin-top: 0;
    flex-shrink: 0;
    width: 90px;
    text-align: right;
}

/* Item recortado (aguardando colar) -- fica meio transparente pra indicar
   que vai sumir do lugar atual quando colar em outro lugar */
.file-item.cut-pending {
    opacity: 0.4;
}

/* Overlay de pre-visualizacao (imagem/pdf em tamanho grande) */
.preview-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(6px);
    z-index: 3000;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.preview-overlay.active {
    display: flex;
}

.preview-content {
    max-width: 100%;
    max-height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-content img {
    max-width: 100%;
    max-height: 85vh;
    border-radius: var(--radius-md);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}

.preview-content iframe {
    width: 80vw;
    height: 85vh;
    border: none;
    border-radius: var(--radius-md);
    background: white;
}

.preview-close {
    position: absolute;
    top: 24px;
    right: 24px;
    z-index: 3001;
}

/* Utils */
.hidden { display: none !important; }
.spin { animation: spin 1s linear infinite; }
@keyframes spin { 100% { transform: rotate(360deg); } }

.bounce { animation: bounce 1.5s infinite; }
@keyframes bounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }