:root {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --text-main: #f8fafc;
    --text-dim: #94a3b8;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --error: #ef4444;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: var(--bg-card);
    border-bottom: 1px solid var(--glass-border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.025em;
}

nav {
    display: flex;
    gap: 1rem;
}

nav button {
    background: transparent;
    border: none;
    color: var(--text-dim);
    font-weight: 600;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.2s;
}

nav button.active {
    background: var(--accent);
    color: white;
}

main {
    flex: 1;
    padding: 2rem;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.card {
    width: 100%;
    max-width: 600px;
    padding: 2rem;
    border-radius: 1rem;
}

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

h2 {
    margin-bottom: 1.5rem;
    font-weight: 600;
    color: var(--accent);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.full-width {
    grid-column: span 2;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    font-size: 0.875rem;
    color: var(--text-dim);
}

input, textarea {
    background: #0f172a;
    border: 1px solid var(--glass-border);
    border-radius: 0.5rem;
    padding: 0.75rem;
    color: white;
    font-family: inherit;
    outline: none;
}

input:focus, textarea:focus {
    border-color: var(--accent);
}

textarea {
    resize: vertical;
    min-height: 100px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
}

.options {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

button.primary {
    display: block;
    width: 100%;
    margin-top: 2rem;
    background: var(--accent);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
}

button.primary:hover {
    background: var(--accent-hover);
}

#terminal-view, #file-view {
    width: 100%;
    max-width: 1200px;
    height: 80vh;
    display: flex;
    flex-direction: column;
}

#terminal-container {
    flex: 1;
    background: #000;
    border-radius: 0.5rem 0.5rem 0 0;
    padding: 10px;
}

.terminal-footer {
    display: flex;
    justify-content: space-between;
    background: #1e293b;
    padding: 0.5rem 1rem;
    border-radius: 0 0 0.5rem 0.5rem;
    font-size: 0.875rem;
}

.file-manager {
    flex: 1;
    border-radius: 0.5rem;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.fm-header {
    background: #1e293b;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#file-list {
    list-style: none;
    flex: 1;
    overflow-y: auto;
}

.file-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    cursor: pointer;
    transition: background 0.2s;
}

.file-item:hover {
    background: rgba(255,255,255,0.05);
}

.file-icon {
    margin-right: 1rem;
    font-size: 1.2rem;
}

.file-name {
    flex: 1;
}

.file-size {
    color: var(--text-dim);
    font-size: 0.875rem;
}

.hidden { display: none !important; }

#error-toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--error);
    color: white;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
    z-index: 1000;
}