:root {
    --primary: #86efac; /* Sage Green */
    --primary-dim: #166534;
    --bg: #0c0a09; /* Deep Onyx */
    --sidebar-bg: #1c1917;
    --card-bg: #292524;
    --text: #fafaf9;
    --text-muted: #a8a29e;
    --border: #44403c;
    --accent: #d97706; /* Amber accent */
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg);
    color: var(--text);
    height: 100vh;
    display: flex;
    overflow: hidden;
}

/* Sidebar & Navigation */
aside {
    width: 280px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 2.5rem 1.5rem;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 50;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    margin-bottom: 4rem;
    color: var(--primary);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1rem;
    border-radius: 0.75rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: all 0.2s ease;
    margin-bottom: 0.5rem;
    cursor: pointer;
    font-size: 0.9375rem;
    font-weight: 500;
}

.nav-item:hover {
    background: #292524;
    color: var(--text);
}

.nav-item.active {
    background: var(--primary);
    color: var(--primary-dim);
}

/* Main Content Area */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    background: var(--bg);
}

header {
    padding: 2.5rem 3rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    background: var(--bg);
    z-index: 20;
}

h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.user-tag {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
    background: var(--sidebar-bg);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    border: 1px solid var(--border);
}

/* File Grid */
.file-container {
    padding: 0 3rem 3rem;
}

.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1.5rem;
}

.file-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 1.25rem;
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    cursor: pointer;
}

.file-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 12px 24px -8px rgba(0,0,0,0.5);
}

.file-icon {
    width: 48px;
    height: 48px;
    background: var(--sidebar-bg);
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 1.25rem;
}

.file-name {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.file-info {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.file-actions {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
    opacity: 0;
    transition: opacity 0.2s;
}

.file-card:hover .file-actions {
    opacity: 1;
}

.action-btn {
    width: 32px;
    height: 32px;
    border-radius: 0.5rem;
    background: var(--sidebar-bg);
    border: 1px solid var(--border);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.action-btn:hover {
    background: var(--primary);
    color: var(--primary-dim);
    border-color: var(--primary);
}

/* Buttons */
.btn {
    padding: 0.75rem 1.25rem;
    border-radius: 0.75rem;
    font-size: 0.875rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    filter: brightness(1.1);
}

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

.btn-outline:hover {
    background: var(--card-bg);
}

/* Editor & Modals */
.editor-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg);
    z-index: 100;
    display: none;
    flex-direction: column;
}

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

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--sidebar-bg);
    border: 1px solid var(--border);
    border-radius: 1.5rem;
    padding: 2.5rem;
    width: 90%;
    max-width: 440px;
    z-index: 200;
    display: none;
    box-shadow: 0 32px 64px -16px rgba(0,0,0,0.8);
}

/* Mobile Responsiveness */
.mobile-nav-toggle {
    display: none;
    font-size: 1.5rem;
    color: var(--text);
    cursor: pointer;
}

@media (max-width: 768px) {
    aside {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        transform: translateX(-100%);
        width: 80%;
        max-width: 300px;
    }

    aside.open {
        transform: translateX(0);
    }

    header {
        padding: 1.5rem;
    }

    .file-container {
        padding: 0 1.5rem 1.5rem;
    }

    .mobile-nav-toggle {
        display: block;
    }

    .file-grid {
        grid-template-columns: 1fr;
    }

    .user-tag span {
        display: none;
    }
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    background: var(--bg);
    border: 1px solid var(--border);
    padding: 0.875rem 1rem;
    border-radius: 0.75rem;
    color: var(--text);
    outline: none;
}

.form-input:focus {
    border-color: var(--primary);
}
footer {
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8125rem;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.file-icon .ph-folder, .file-icon .ph-folder-simple {
    color: var(--accent);
}