:root {
    --primary: #6366f1; --primary-dark: #4f46e5; --primary-light: #818cf8;
    --secondary: #ec4899; --success: #10b981; --warning: #f59e0b; --error: #ef4444;
    --bg-dark: #0f172a; --bg-card: #1e293b; --bg-input: #334155;
    --text-primary: #f1f5f9; --text-secondary: #94a3b8; --border: #475569;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark); color: var(--text-primary); min-height: 100vh; line-height: 1.6;
}

.app-container { min-height: 100vh; display: flex; flex-direction: column; }

.header { background: var(--bg-card); border-bottom: 1px solid var(--border); padding: 1rem 2rem; position: sticky; top: 0; z-index: 100; }
.header-content { max-width: 1400px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }
.logo { display: flex; align-items: center; gap: 0.75rem; }
.logo-icon { font-size: 2rem; }
.logo h1 { font-size: 1.5rem; font-weight: 700; background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav { display: flex; gap: 1rem; }
.nav-link { color: var(--text-secondary); text-decoration: none; padding: 0.5rem 1rem; border-radius: 8px; transition: all 0.3s; }
.nav-link:hover, .nav-link.active { color: var(--text-primary); background: var(--bg-input); }

.main-content { flex: 1; padding: 2rem; max-width: 1400px; margin: 0 auto; width: 100%; }
.generator-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: start; }

.form-panel, .preview-panel { background: var(--bg-card); border-radius: 16px; padding: 2rem; border: 1px solid var(--border); }
.panel-header { margin-bottom: 1.5rem; }
.panel-header h2 { font-size: 1.25rem; margin-bottom: 0.5rem; }
.panel-header p { color: var(--text-secondary); font-size: 0.9rem; }
.badge { display: inline-block; background: linear-gradient(135deg, var(--primary), var(--secondary)); padding: 0.25rem 0.75rem; border-radius: 20px; font-size: 0.75rem; font-weight: 600; }

.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.5rem; color: var(--text-primary); }
.form-group .hint { display: block; font-weight: 400; font-size: 0.8rem; color: var(--text-secondary); margin-top: 0.25rem; }
.form-group textarea, .form-group input { width: 100%; padding: 0.875rem 1rem; background: var(--bg-input); border: 2px solid var(--border); border-radius: 10px; color: var(--text-primary); font-size: 0.95rem; transition: all 0.3s; resize: vertical; }
.form-group textarea:focus, .form-group input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2); }
.char-count { text-align: right; font-size: 0.8rem; color: var(--text-secondary); margin-top: 0.5rem; }

.template-buttons { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.template-btn { padding: 0.5rem 1rem; background: var(--bg-input); border: 1px solid var(--border); border-radius: 8px; color: var(--text-secondary); cursor: pointer; font-size: 0.85rem; transition: all 0.3s; }
.template-btn:hover { border-color: var(--primary); color: var(--primary-light); }
.template-btn.active { background: var(--primary); border-color: var(--primary); color: white; }

.size-options { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.5rem; }
.size-option input { display: none; }
.size-box { display: block; padding: 0.75rem; text-align: center; background: var(--bg-input); border: 2px solid var(--border); border-radius: 8px; font-size: 0.85rem; cursor: pointer; transition: all 0.3s; }
.size-option input:checked + .size-box { border-color: var(--primary); background: rgba(99, 102, 241, 0.2); color: var(--primary-light); }

.accordion { margin-bottom: 1.5rem; }
.accordion-header { width: 100%; padding: 1rem; background: var(--bg-input); border: 1px solid var(--border); border-radius: 10px; color: var(--text-primary); font-size: 0.95rem; font-weight: 600; cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: all 0.3s; }
.accordion-header:hover { border-color: var(--primary); }
.accordion-content { display: none; padding: 1rem; background: var(--bg-input); border: 1px solid var(--border); border-top: none; border-radius: 0 0 10px 10px; margin-top: -10px; }
.accordion-content.active { display: block; }
.accordion-icon { transition: transform 0.3s; }
.accordion-header.active .accordion-icon { transform: rotate(180deg); }

.form-group input[type="range"] { width: 100%; height: 6px; background: var(--border); border-radius: 3px; outline: none; -webkit-appearance: none; margin: 1rem 0; }
.form-group input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; background: var(--primary); border-radius: 50%; cursor: pointer; box-shadow: 0 2px 6px rgba(99, 102, 241, 0.4); }
.range-labels { display: flex; justify-content: space-between; font-size: 0.75rem; color: var(--text-secondary); }

.btn-generate { width: 100%; padding: 1rem 2rem; background: linear-gradient(135deg, var(--primary), var(--secondary)); border: none; border-radius: 12px; color: white; font-size: 1.1rem; font-weight: 700; cursor: pointer; transition: all 0.3s; display: flex; justify-content: center; align-items: center; gap: 0.5rem; }
.btn-generate:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4); }
.btn-generate:disabled { opacity: 0.7; cursor: not-allowed; }
.spinner { width: 20px; height: 20px; border: 3px solid rgba(255, 255, 255, 0.3); border-top-color: white; border-radius: 50%; animation: spin 1s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

.preview-area { min-height: 400px; background: var(--bg-input); border: 2px dashed var(--border); border-radius: 12px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.preview-area img { max-width: 100%; max-height: 100%; object-fit: contain; }
.placeholder { text-align: center; color: var(--text-secondary); }
.placeholder-icon { font-size: 4rem; display: block; margin-bottom: 1rem; opacity: 0.5; }
.placeholder small { display: block; margin-top: 0.5rem; opacity: 0.7; }

.image-actions { display: flex; gap: 0.5rem; margin-top: 1rem; flex-wrap: wrap; }
.btn-action { flex: 1; min-width: 100px; padding: 0.75rem 1rem; background: var(--bg-input); border: 1px solid var(--border); border-radius: 8px; color: var(--text-primary); cursor: pointer; font-size: 0.85rem; transition: all 0.3s; }
.btn-action:hover { border-color: var(--primary); background: rgba(99, 102, 241, 0.1); }

.generation-info { margin-top: 1.5rem; padding: 1rem; background: var(--bg-input); border-radius: 10px; }
.generation-info h4 { font-size: 0.9rem; margin-bottom: 0.75rem; color: var(--text-secondary); }
.info-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
.info-item { display: flex; justify-content: space-between; padding: 0.5rem; background: var(--bg-card); border-radius: 6px; }
.info-label { color: var(--text-secondary); font-size: 0.85rem; }
.info-value { font-weight: 600; font-size: 0.85rem; }

.footer { padding: 1.5rem 2rem; text-align: center; color: var(--text-secondary); font-size: 0.85rem; border-top: 1px solid var(--border); }

.toast { position: fixed; bottom: 2rem; right: 2rem; padding: 1rem 1.5rem; background: var(--bg-card); border: 1px solid var(--success); border-radius: 10px; color: var(--success); font-weight: 500; transform: translateY(100px); opacity: 0; transition: all 0.3s; z-index: 1000; max-width: 400px; }
.toast.show { transform: translateY(0); opacity: 1; }
.toast.error { border-color: var(--error); color: var(--error); }

@media (max-width: 1024px) { .generator-layout { grid-template-columns: 1fr; } .size-options { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 768px) { .header { padding: 1rem; } .main-content { padding: 1rem; } .form-panel, .preview-panel { padding: 1.5rem; } .size-options { grid-template-columns: repeat(2, 1fr); } }