:root {
    --bg-main: #f4f6f8;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f0f4f8;
    --border: #e1e4e8;
    --text-main: #24292e;
    --text-muted: #6a737d;
    --accent: #0366d6;
    --accent-hover: #005cc5;
    --danger: #d73a49;
    --danger-hover: #cb2431;
    --input-bg: #ffffff;
    --code-bg: #f6f8fa;
}

.theme-dark {
    --bg-main: #0d1117;
    --bg-surface: #161b22;
    --bg-surface-hover: #21262d;
    --border: #30363d;
    --text-main: #c9d1d9;
    --text-muted: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #79c0ff;
    --danger: #f85149;
    --danger-hover: #ff7b72;
    --input-bg: #0d1117;
    --code-bg: #0d1117;
}

* { box-sizing: border-box; }

body {
    margin: 0; padding: 0;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    height: 100vh; display: flex; flex-direction: column;
}

/* Header */
.top-nav {
    display: flex; justify-content: space-between; align-items: center;
    padding: 1rem 2rem; background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
}
.logo { display: flex; align-items: center; gap: 10px; color: var(--accent); }
.logo h1 { margin: 0; font-size: 1.5rem; font-weight: 700; color: var(--text-main); }

/* Buttons */
button {
    cursor: pointer; font-family: inherit; font-weight: 600;
    border-radius: 6px; border: none; padding: 0.5rem 1rem;
    transition: all 0.2s;
}
button i { margin-right: 5px; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-text { background: transparent; color: var(--text-main); }
.btn-text:hover { background: var(--bg-surface-hover); }
.text-danger { color: var(--danger); }
.text-danger:hover { background: rgba(248, 81, 73, 0.1); }

/* Layout */
.app-layout {
    display: flex; flex: 1; overflow: hidden;
}
.compiler-panel {
    width: 45%; min-width: 400px; background: var(--bg-surface);
    border-right: 1px solid var(--border);
    display: flex; flex-direction: column;
}
.editor-panel {
    flex: 1; display: flex; flex-direction: column;
    background: var(--bg-main);
}

.panel-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0.75rem 1.5rem; background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
}
.panel-header h2 { margin: 0; font-size: 1.1rem; }

/* Textarea */
#shorthand-input {
    flex: 1; width: 100%; resize: none; border: none;
    background: var(--code-bg); color: var(--text-main);
    padding: 1.5rem; font-family: 'JetBrains Mono', monospace; font-size: 14px;
    line-height: 1.6; outline: none;
}

/* Snippet Modal */
.modal-overlay {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    background: rgba(0, 0, 0, 0.75); display: flex; justify-content: center; align-items: center;
    z-index: 1000; opacity: 1; transition: opacity 0.2s;
}
.modal-overlay.hidden { opacity: 0; pointer-events: none; }
.modal-content {
    background: var(--bg-surface); border: 2px solid var(--border);
    border-radius: 8px; width: 700px; max-width: 90%; max-height: 90vh;
    display: flex; flex-direction: column; box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}
.modal-header { 
    display: flex; justify-content: space-between; align-items: center; 
    border-bottom: 1px solid var(--border); padding: 1rem 1.5rem; 
}
.modal-header h2 { margin: 0; color: var(--accent); display: flex; gap: 10px; align-items: center; font-size: 1.2rem; }
.btn-icon { background: transparent; border: none; font-size: 1.2rem; cursor: pointer; color: var(--text-muted); padding: 0; }
.btn-icon:hover { color: var(--accent); }
.modal-body { padding: 1.5rem; overflow-y: auto; }
.snippet-category { margin-bottom: 2rem; }
.snippet-category h3 { margin-top: 0; margin-bottom: 10px; font-size: 0.95rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.snippet-row {
    display: flex; justify-content: space-between; align-items: center;
    padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px;
    margin-bottom: 8px; background: var(--input-bg);
}
.snippet-row code { font-family: 'JetBrains Mono', monospace; color: var(--text-main); font-size: 0.9rem; }
.btn-insert {
    background: rgba(3, 102, 214, 0.1); color: var(--accent);
    border: 1px solid var(--accent); border-radius: 4px; padding: 4px 10px;
    font-size: 0.8rem; font-weight: 600; cursor: pointer; transition: all 0.2s;
}
.btn-insert:hover { background: var(--accent); color: #fff; }

/* Ace */
#json-editor { flex: 1; }