:root {
    --bg: #f8fafc;
    --sidebar-bg: #ffffff;
    --sidebar-border: #e2e8f0;
    --card-bg: #ffffff;
    --card-shadow: 0 10px 15px -3px rgba(0,0,0,0.05), 0 4px 6px -2px rgba(0,0,0,0.025);
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --nav-hover-bg: #f1f5f9;
    --nav-active-bg: #eef2ff;
    --table-head-bg: #f8fafc;
    --table-row-hover: #f1f5f9;
    --input-bg: #ffffff;
    --input-border: #cbd5e1;
    --file-ctrl-bg: #f8fafc;
    --upload-zone-bg: #f8fafc;
    --info-card-bg: #ffffff;
    --stat-card-bg: #ffffff;
    --accent: #4f46e5;
    --accent-light: #818cf8;
    --text-success: #059669;
    --text-warning: #d97706;
    --text-danger: #dc2626;
    --text-info: #0284c7;
    --bg-success: #d1fae5;
    --bg-danger: #fee2e2;
    --bg-warning: #fef3c7;
    --bg-accent: #eef2ff;
    --border-accent: #818cf8;
}
[data-theme="dark"] {
    --bg: #0f1117;
    --sidebar-bg: #1a1d27;
    --sidebar-border: #2d3148;
    --card-bg: #1a1d27;
    --card-shadow: 0 4px 20px rgba(0,0,0,0.3);
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #2d3148;
    --border-light: #252840;
    --nav-hover-bg: #252840;
    --nav-active-bg: #2d1b69;
    --table-head-bg: #141624;
    --table-row-hover: #252840;
    --input-bg: #141624;
    --input-border: #2d3148;
    --file-ctrl-bg: #141624;
    --upload-zone-bg: #141624;
    --info-card-bg: #141624;
    --stat-card-bg: #141624;
    --text-success: #34d399;
    --text-warning: #fbbf24;
    --text-danger: #ef4444;
    --text-info: #38bdf8;
    --bg-success: #10b981;
    --bg-danger: #ef4444;
    --bg-warning: #d97706;
    --bg-accent: #312e81;
    --border-accent: #818cf8;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', sans-serif; background: var(--bg); display: flex; height: 100vh; overflow: hidden; color: var(--text-primary); transition: background 0.3s, color 0.3s; }

/* Sidebar */
.sidebar { width: 260px; background: var(--sidebar-bg); border-right: 1px solid var(--sidebar-border); display: flex; flex-direction: column; overflow-y: auto; transition: background 0.3s; flex-shrink: 0; }
.sidebar-header { padding: 20px 20px; border-bottom: 1px solid var(--sidebar-border); display: flex; align-items: center; justify-content: space-between; }
.sidebar-header h2 { font-size: 20px; color: var(--accent); font-weight: 700; letter-spacing: -0.5px; }
.theme-btn { background: var(--nav-hover-bg); border: 1px solid var(--border); color: var(--text-secondary); width: 32px; height: 32px; border-radius: 8px; cursor: pointer; font-size: 16px; display: flex; align-items: center; justify-content: center; transition: all 0.2s; flex-shrink: 0; }
.theme-btn:hover { background: var(--nav-active-bg); color: var(--accent); }
.nav-links { padding: 10px 0; }
.sidebar a { padding: 11px 20px; color: var(--text-secondary); text-decoration: none; font-size: 13.5px; display: flex; align-items: center; gap: 10px; border-left: 3px solid transparent; font-weight: 500; transition: all 0.2s; cursor: pointer; }
.sidebar a:hover { background: var(--nav-hover-bg); color: var(--accent); }
.sidebar a.active { background: var(--nav-active-bg); border-left-color: var(--accent); color: var(--accent); font-weight: 600; }
.sidebar-title { padding: 14px 20px 4px; font-size: 10px; text-transform: uppercase; color: var(--text-muted); font-weight: 700; letter-spacing: 1.2px; }
.logout-btn { color: #e53e3e !important; }
.logout-btn:hover { background: rgba(229,62,62,0.08) !important; }

/* Main Content */
.main-content { flex: 1; padding: 35px 45px; overflow-y: auto; height: 100%; }
.header { margin-bottom: 30px; }
.header h1 { font-size: 26px; font-weight: 700; color: var(--text-primary); }
.header p { color: var(--text-secondary); margin-top: 5px; font-size: 14px; }

/* Cards */
.card { background: var(--card-bg); padding: 28px; border-radius: 12px; box-shadow: var(--card-shadow); margin-bottom: 25px; display: none; border: 1px solid var(--border); transition: background 0.3s; }
.card.active { display: block; }
h3 { margin-bottom: 20px; color: var(--text-primary); font-size: 18px; font-weight: 600; display: flex; align-items: center; gap: 10px; border-bottom: 1px solid var(--border-light); padding-bottom: 14px; }

/* Form Controls */
.form-group { margin-bottom: 15px; }
.form-group label { display: block; margin-bottom: 5px; font-size: 14px; color: var(--text-secondary); font-weight: 500; }
.form-control { width: 100%; padding: 10px 15px; border: 1px solid var(--input-border); border-radius: 6px; font-size: 14px; font-family: inherit; background: var(--input-bg); color: var(--text-primary); transition: all 0.2s; }
.form-control:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(103,58,183,0.15); }

/* Buttons */
.btn { padding: 10px 20px; font-size: 14px; font-weight: 600; border: none; border-radius: 8px; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 8px; transition: all 0.2s; text-decoration: none; outline: none; }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: #5e35b1; box-shadow: 0 4px 12px rgba(103,58,183,0.3); }
.btn-secondary { background: var(--nav-hover-bg); color: var(--text-secondary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-danger { background: #fee2e2; color: #ef4444; }
.btn-danger:hover { background: #fecaca; }
.btn-success { background: #c6f6d5; color: #2f855a; }
.btn-success:hover { background: #9ae6b4; }
.btn-sm { padding: 6px 12px; font-size: 12px; border-radius: 6px; }

/* Terminal */
.terminal-wrapper { background: #0d1117; border-radius: 8px; padding: 20px; box-shadow: inset 0 2px 4px rgba(0,0,0,0.4); border: 1px solid #30363d; transition: all 0.3s ease; }
.logs-terminal-wrapper { height: 500px; display: flex; flex-direction: column; padding: 15px; }
.terminal-wrapper.fullscreen { position: fixed !important; top: 0 !important; left: 0 !important; width: 100vw !important; height: 100vh !important; max-height: 100vh !important; z-index: 999999 !important; border-radius: 0 !important; padding: 20px 30px !important; border: none !important; display: flex !important; flex-direction: column !important; background: #0d1117 !important; box-sizing: border-box !important; }
.terminal-wrapper.fullscreen .terminal-output { flex: 1 !important; height: calc(100vh - 100px) !important; max-height: none !important; font-size: 14px !important; }
.terminal-wrapper.fullscreen .terminal-input-row { padding-top: 15px; }
.terminal-output { color: #c9d1d9; font-family: 'Menlo', 'Monaco', 'Courier New', monospace; height: 400px; overflow-y: auto; white-space: pre-wrap; font-size: 13px; line-height: 1.6; margin-bottom: 10px; }
.terminal-input-row { display: flex; align-items: center; gap: 10px; border-top: 1px solid #30363d; padding-top: 15px; }
.terminal-cwd { color: #3fb950; font-family: monospace; font-size: 13px; font-weight: bold; }
.terminal-input { flex: 1; background: transparent; border: none; color: #c9d1d9; font-family: monospace; font-size: 13px; outline: none; }

/* Tables */
.table-wrapper { border: 1px solid var(--border); border-radius: 8px; overflow: hidden; margin-top: 15px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 13px 18px; text-align: left; border-bottom: 1px solid var(--border); }
th { background-color: var(--table-head-bg); color: var(--text-secondary); font-weight: 600; text-transform: uppercase; font-size: 11px; letter-spacing: 0.5px; }
tr:last-child td { border-bottom: none; }
tr:hover td { background-color: var(--table-row-hover); }
td { color: var(--text-primary); }

/* File Explorer specific */
.file-controls { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; background: var(--file-ctrl-bg); padding: 14px; border-radius: 8px; border: 1px solid var(--border); }
.path-breadcrumb { font-family: monospace; font-size: 14px; color: var(--text-secondary); font-weight: 500; }
.file-name { cursor: pointer; color: #3182ce; font-weight: 500; display: flex; align-items: center; gap: 10px; }
.file-name:hover { text-decoration: underline; }
.action-links a { color: var(--accent); text-decoration: none; margin-right: 10px; font-weight: 500; cursor: pointer; }
.action-links a:hover { text-decoration: underline; }
.action-links a.del { color: #e53e3e; }

/* Editor */
#editorContainer { display: none; }
#fileEditor { width: 100%; height: 500px; background: #0d1117; color: #c9d1d9; font-family: 'Menlo', monospace; padding: 20px; font-size: 13px; border-radius: 8px; border: 1px solid #30363d; outline: none; resize: vertical; line-height: 1.5; }

/* Stats Grid */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 18px; margin-bottom: 25px; }
.stat-card { background: var(--stat-card-bg); padding: 22px; border-radius: 12px; border: 1px solid var(--border); text-align: center; }
.stat-title { color: var(--text-muted); font-size: 12px; text-transform: uppercase; font-weight: 600; letter-spacing: 0.5px; margin-bottom: 14px; }
.chart-container { position: relative; height: 140px; width: 100%; }

/* Drag & Drop Upload */
.upload-zone { border: 2px dashed var(--border); border-radius: 12px; padding: 45px 20px; text-align: center; background: var(--upload-zone-bg); transition: all 0.3s; cursor: pointer; margin-bottom: 20px; color: var(--text-secondary); }
.upload-zone.dragover { border-color: var(--accent); background: rgba(103,58,183,0.08); }
.progress-container { display: none; margin-top: 25px; background: var(--card-bg); padding: 20px; border-radius: 8px; border: 1px solid var(--border); }
.progress-bar-bg { width: 100%; background: var(--border); border-radius: 8px; height: 10px; overflow: hidden; margin-bottom: 10px; }
.progress-bar-fill { height: 100%; background: linear-gradient(90deg, #673ab7, #9f7aea); width: 0%; transition: width 0.2s; }
.progress-stats { display: flex; justify-content: space-between; font-size: 13px; color: var(--text-muted); font-weight: 500; }

.split-view { display: flex; gap: 25px; flex-wrap: wrap; }
.split-left { flex: 1; min-width: 280px; }
.split-right { flex: 2; min-width: 280px; }

/* Info Cards */
.info-card { background: var(--info-card-bg); border-radius: 12px; border: 1px solid var(--border); padding: 22px; margin-bottom: 22px; }
.info-card h3 { font-size: 15px; margin-bottom: 18px; color: var(--text-secondary); display: flex; align-items: center; gap: 8px; border: none; padding: 0; }
.info-row { display: flex; justify-content: space-between; align-items: center; padding: 11px 0; border-bottom: 1px solid var(--border-light); font-size: 14px; }
.info-row:last-child { border-bottom: none; padding-bottom: 0; }
.info-label { color: var(--text-muted); width: 120px; flex-shrink: 0; font-weight: 500; }
.info-value { color: var(--text-primary); font-family: 'Menlo', monospace; font-size: 13px; display: flex; align-items: center; gap: 10px; }
.copy-icon { cursor: pointer; color: var(--text-muted); transition: color 0.2s; font-size: 16px; }
.copy-icon:hover { color: var(--accent); }
.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }

/* Toggle Switch Styles */
.switch { position: relative; display: inline-block; width: 48px; height: 24px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: #ccc; transition: .4s; border-radius: 24px; }
.slider:before { position: absolute; content: ""; height: 18px; width: 18px; left: 3px; bottom: 3px; background-color: white; transition: .4s; border-radius: 50%; }
input:checked + .slider { background-color: #48bb78; }
input:focus + .slider { box-shadow: 0 0 1px #48bb78; }
input:checked + .slider:before { transform: translateX(24px); }

/* Preloader Overlay */
.overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.7); z-index: 9999; justify-content: center; align-items: center; color: white; flex-direction: column; }
.spinner { border: 6px solid rgba(255,255,255,0.2); border-top: 6px solid #9f7aea; border-radius: 50%; width: 55px; height: 55px; animation: spin 1s linear infinite; margin-bottom: 20px; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    width: 90%;
    max-width: 450px;
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    transform: scale(1);
    animation: scaleIn 0.2s ease-out;
}

@keyframes scaleIn {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}