:root {
    --bg-body: #fefae0; 
    --bg-header: #dda15e; 
    --text-header: #283618;
    --brand-color: #bc6c25; 
    --bg-panel-left: #fefae0; 
    --bg-panel-right: #e9edc9;
    --border-color: #dda15e; 
    --text-main: #283618; 
    --bg-code: #ffffff;
    --text-code: #283618; 
    --bg-canvas: #ffffff; 
    --btn-primary: #bc6c25; 
    --btn-export: #606c38;
}

[data-theme="dark"] {
    --bg-body: #283618; 
    --bg-header: #1e2912; 
    --text-header: #fefae0;
    --brand-color: #dda15e; 
    --bg-panel-left: #283618; 
    --bg-panel-right: #606c38;
    --border-color: #606c38; 
    --text-main: #fefae0; 
    --bg-code: #1e2912;
    --text-code: #dda15e; 
    --bg-canvas: #fefae0; 
    --btn-primary: #dda15e; 
    --btn-export: #283618;
}

* { 
    box-sizing: border-box; 
    font-family: 'Instrument Serif', serif; 
    letter-spacing: 0.02em; 
}

body { 
    margin: 0; padding: 0; display: flex; flex-direction: column; 
    height: 100vh; background: var(--bg-body); color: var(--text-main); 
    transition: background 0.4s, color 0.4s; overflow: hidden; font-size: 1.2rem; 
}

header { 
    background: var(--bg-header); color: var(--text-header); padding: 15px 25px; 
    display: flex; justify-content: space-between; align-items: center; 
    border-bottom: 2px solid var(--brand-color); flex-shrink: 0; transition: background 0.4s; 
}

.branding { display: flex; align-items: center; gap: 12px; }
.logo { width: 40px; height: 40px; border-radius: 8px; object-fit: cover; background: white; }
.app-title { margin: 0; font-size: 1.8rem; font-style: italic; }
.header-actions { display: flex; align-items: center; gap: 15px; }

.theme-toggle { 
    background: transparent; border: none; color: var(--text-header); 
    cursor: pointer; position: relative; width: 40px; height: 40px; 
    border-radius: 50%; display: flex; align-items: center; justify-content: center; 
    overflow: hidden; transition: background 0.3s; 
}
.theme-toggle:hover { background: rgba(255,255,255,0.1); }
.theme-toggle svg { width: 24px; height: 24px; fill: currentColor; position: absolute; transition: transform 0.5s cubic-bezier(0.4, 0.0, 0.2, 1), opacity 0.5s; }

.icon-sun { opacity: 0; transform: rotate(-90deg) scale(0.5); }
.icon-moon { opacity: 1; transform: rotate(0deg) scale(1); }
[data-theme="light"] .icon-sun { opacity: 1; transform: rotate(0deg) scale(1); }
[data-theme="light"] .icon-moon { opacity: 0; transform: rotate(90deg) scale(0.5); }

.btn-help { font-size: 1.2rem; font-style: italic; width: auto; border-radius: 4px; padding: 0 10px; }

.main-container { display: flex; flex: 1; overflow: hidden; flex-direction: row; }
.panel { flex: 1; padding: 20px; display: flex; flex-direction: column; overflow-y: auto; }
.left-panel { background: var(--bg-panel-left); border-right: 1px solid var(--border-color); }
.right-panel { background: var(--bg-panel-right); align-items: center; justify-content: flex-start; }

.toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 15px; width: 100%; justify-content: space-between; align-items: center;}
select { flex: 1; min-width: 150px; padding: 8px 12px; border-radius: 4px; border: 1px solid var(--border-color); background: var(--bg-code); color: var(--text-main); font-size: 1.2rem; cursor: pointer; transition: 0.3s; }

textarea { 
    flex-grow: 1; width: 100%; background: var(--bg-code); color: var(--text-code); 
    border: 1px solid var(--border-color); border-radius: 6px; padding: 15px; 
    font-family: monospace; font-size: 15px; resize: none; outline: none; 
    margin-bottom: 10px; transition: 0.3s; 
}

button { padding: 8px 18px; border: none; border-radius: 4px; cursor: pointer; transition: 0.2s; white-space: nowrap; font-size: 1.2rem; }
.btn-primary { background: var(--btn-primary); color: var(--bg-body); font-weight: bold; }
.btn-primary:hover { filter: brightness(1.1); }

.btn-export { display: flex; align-items: center; justify-content: center; gap: 6px; background: var(--btn-export); color: #fefae0; border: 1px solid var(--border-color); min-width: 80px; }
.btn-export:hover { filter: brightness(1.2); }
.btn-export svg { width: 16px; height: 16px; }

.export-group { display: flex; align-items: center; justify-content: space-between; width: 100%; background: rgba(0,0,0,0.1); padding: 8px 15px; border-radius: 8px; border: 1px solid var(--border-color); flex-wrap: wrap; gap: 10px; }
.export-left { display: flex; align-items: center; gap: 15px; }
.export-right { display: flex; align-items: center; gap: 10px; }
.toolbar-toggle { display: flex; align-items: center; gap: 5px; font-size: 1.1rem; cursor: pointer; }
.download-label { font-weight: bold; color: var(--brand-color); font-style: italic; }

.label-options-container { display: flex; align-items: center; gap: 5px; transition: all 0.3s; }
#labelColor { border: none; width: 24px; height: 24px; cursor: pointer; background: transparent; padding: 0; }

.canvas-container { 
    background: var(--bg-canvas); padding: 10px; border-radius: 8px; 
    box-shadow: 0 4px 15px rgba(0,0,0,0.2); width: 100%; max-width: 800px; 
    height: 100%; min-height: 350px; max-height: 550px; display: flex; 
    align-items: center; justify-content: center; overflow: hidden; 
    border: 1px solid var(--border-color); transition: background 0.3s; 
}
.canvas-container.transparent { 
    background: transparent; 
    background-image: radial-gradient(var(--border-color) 1px, transparent 0); 
    background-size: 20px 20px; 
}
#renderArea svg { max-height: 100%; max-width: 100%; }

.tour-spotlight-active { 
    position: relative; z-index: 1001 !important; 
    box-shadow: 0 0 0 4px var(--brand-color), 0 0 20px rgba(0,0,0,0.5) !important; 
    border-radius: 6px; background: var(--bg-code); 
}
.tour-backdrop { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background: rgba(0, 0, 0, 0.4); z-index: 1000; opacity: 0; pointer-events: none; transition: opacity 0.3s ease; }
.tour-backdrop.active { opacity: 1; pointer-events: all; }

.tour-tooltip { position: fixed; z-index: 1002; background: var(--bg-header); color: var(--text-header); padding: 20px; border-radius: 8px; width: 320px; border: 1px solid var(--brand-color); box-shadow: 0 10px 25px rgba(0,0,0,0.5); opacity: 0; pointer-events: none; transition: opacity 0.3s ease, top 0.4s ease, left 0.4s ease; }
.tour-tooltip.active { opacity: 1; pointer-events: all; }
.tour-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.tour-title { margin: 0; color: var(--brand-color); font-size: 1.6rem; font-style: italic; }
.tour-badge { font-size: 1rem; color: var(--brand-color); }
.tour-content { margin-bottom: 20px; font-size: 1.1rem; line-height: 1.3; }
.tour-footer { display: flex; justify-content: space-between; gap: 10px; }
.btn-tour-skip { background: transparent; color: #94a3b8; border: 1px solid #94a3b8; font-size: 1.1rem; padding: 4px 12px; }
.btn-tour-skip:hover { background: rgba(255,255,255,0.1); color: var(--text-header); }

@media (max-width: 768px) {
    .main-container { flex-direction: column; overflow-y: auto; }
    .panel { overflow-y: visible; flex: none; height: auto; }
    .left-panel { border-right: none; border-bottom: 2px solid var(--border-color); min-height: 50vh; }
    .right-panel { min-height: 50vh; padding-bottom: 30px; }
    .canvas-container { height: 350px; }
    .export-group { justify-content: center; }
}

.btn-guide {
    display: flex; align-items: center; justify-content: center; gap: 6px; 
    background: transparent; color: var(--brand-color); border: none; cursor: pointer; 
    font-size: 1.1rem; padding: 10px 0; font-style: italic; 
    align-self: center; margin-top: 10px;
}
.btn-guide svg { width: 18px; height: 18px; }
.btn-guide:hover { filter: brightness(1.2); }

.guide-overlay {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    background: rgba(0, 0, 0, 0.6); backdrop-filter: blur(5px);
    z-index: 2000; display: flex; justify-content: center; align-items: center;
    opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
}
.guide-overlay.active { opacity: 1; pointer-events: all; }

.guide-modal {
    background: var(--bg-panel-left); color: var(--text-main); width: 90%; max-width: 800px;
    height: 80vh; border-radius: 8px; border: 1px solid var(--border-color);
    display: flex; flex-direction: column; position: relative; box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    overflow: hidden;
}

.guide-close {
    position: absolute; top: 8px; right: 15px; background: transparent; border: none;
    font-size: 2rem; color: var(--text-main); cursor: pointer; z-index: 10; padding: 0;
}
.guide-close:hover { color: var(--brand-color); }

.guide-tabs {
    display: flex; border-bottom: 1px solid var(--border-color); background: var(--bg-header);
}

.guide-tab {
    flex: 1; padding: 15px; background: transparent; border: none; font-size: 1.3rem;
    color: var(--text-header); cursor: pointer; border-bottom: 3px solid transparent; 
    transition: 0.3s; font-style: italic;
}
.guide-tab.active { border-bottom-color: var(--text-main); font-weight: bold; color: var(--text-main); }
.guide-tab:hover { background: rgba(0,0,0,0.05); }

.guide-content-area {
    padding: 20px 30px; overflow-y: auto; flex: 1; font-family: sans-serif; font-size: 1.1rem; line-height: 1.6;
}
.guide-content-area h2, .guide-content-area h3 { font-family: 'Instrument Serif', serif; color: var(--brand-color); }
.guide-content-area pre {
    background: var(--bg-code); padding: 15px; border-radius: 5px; overflow-x: auto;
    border: 1px solid var(--border-color); color: var(--text-code); font-family: monospace;
}
.guide-content-area code { font-family: monospace; background: var(--bg-code); padding: 2px 4px; border-radius: 3px; }

.guide-content-area blockquote { 
    border-left: 4px solid var(--brand-color); margin: 0; padding: 15px 40px 15px 15px; 
    font-style: italic; background: rgba(188, 108, 37, 0.1); border-radius: 0 5px 5px 0;
}

.prompt-container { position: relative; margin-top: 10px; }
.copy-prompt-btn {
    position: absolute; top: 10px; right: 10px;
    background: transparent; border: none;
    cursor: pointer; color: var(--brand-color);
    padding: 5px; transition: transform 0.2s;
}
.copy-prompt-btn:hover { transform: scale(1.1); color: var(--text-main); }
.copy-prompt-btn svg { width: 20px; height: 20px; }

.guide-pane { display: none; }
.guide-pane.active { display: block; animation: fadeIn 0.3s; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.toast-notification {
    position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%) translateY(50px);
    background: var(--btn-export); color: #fefae0; padding: 10px 20px;
    border-radius: 30px; font-size: 1.1rem; box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    opacity: 0; pointer-events: none; transition: all 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    z-index: 3000; font-family: sans-serif; font-weight: bold;
}
.toast-notification.show {
    opacity: 1; transform: translateX(-50%) translateY(0);
}