:root {
    --bg-app: #F3F4F6;
    --bg-panel: #FFFFFF;
    --bg-canvas: #E5E7EB;
    --text-main: #1F2937;
    --text-muted: #6B7280;
    --accent: #3B82F6;
    --accent-hover: #2563EB;
    --border: #E5E7EB;
    --danger: #EF4444;
    --danger-hover: #DC2828;
    --success: #10B981;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 8px;
    --secondary: #6B7280;
}

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

body {
    font-family: 'Inter', 'Roboto', 'Segoe UI', sans-serif;
    background-color: var(--bg-app);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Auth Pages */
.auth-body { display: flex; justify-content: center; align-items: center; height: 100vh; background: linear-gradient(135deg, #f6f8fb 0%, #e5e7eb 100%); }
.auth-container { background-color: var(--bg-panel); padding: 2.5rem; border-radius: var(--radius); width: 100%; max-width: 400px; box-shadow: var(--shadow-lg); text-align: center; }
.auth-container h1 { margin-bottom: 0.5rem; font-size: 1.75rem; font-weight: 700; color: var(--text-main); }
.auth-container p { color: var(--text-muted); margin-bottom: 2rem; font-size: 0.95rem; }

.form-group { margin-bottom: 1.25rem; text-align: left; }
.form-group label { display: block; margin-bottom: 0.5rem; color: var(--text-main); font-size: 0.875rem; font-weight: 500; }
.form-group input { width: 100%; padding: 0.75rem 1rem; background-color: #F9FAFB; border: 1px solid var(--border); color: var(--text-main); border-radius: var(--radius); font-size: 1rem; transition: border-color 0.2s, box-shadow 0.2s; }
.form-group input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1); background-color: #fff; }

.btn { display: inline-flex; justify-content: center; align-items: center; gap: 0.5rem; padding: 0.75rem 1.5rem; border: none; border-radius: var(--radius); cursor: pointer; font-weight: 500; font-size: 0.95rem; text-align: center; text-decoration: none; transition: all 0.2s; }
.btn-primary { background-color: var(--accent); color: #fff; }
.btn-primary:hover { background-color: var(--accent-hover); box-shadow: var(--shadow-sm); }
.btn-secondary { background-color: #F3F4F6; color: var(--text-main); border: 1px solid var(--border); }
.btn-secondary:hover { background-color: #E5E7EB; }
.btn-danger { background-color: #FEF2F2; color: var(--danger); border: 1px solid #FCA5A5; }
.btn-danger:hover { background-color: var(--danger); color: white; }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.875rem; }
.btn-icon { padding: 0.5rem; border-radius: var(--radius); background: none; border: none; cursor: pointer; color: var(--text-muted); transition: all 0.2s; display: flex; flex-direction: column; align-items: center; gap: 4px; font-size: 0.75rem; width: 64px; }
.btn-icon:hover { background-color: #EFF6FF; color: var(--accent); }
.btn-icon svg { width: 24px; height: 24px; }

.error-msg { color: var(--danger); margin-top: 1rem; font-size: 0.875rem; text-align: center; }

/* App Layout */
.app-container { display: flex; height: 100vh; overflow: hidden; }
.sidebar { width: 220px; background-color: var(--bg-panel); border-right: 1px solid var(--border); display: flex; flex-direction: column; z-index: 10; box-shadow: var(--shadow-sm); }
.sidebar-header { padding: 1.5rem 1.25rem; border-bottom: 1px solid var(--border); font-weight: 700; font-size: 1.1rem; color: var(--accent); display: flex; align-items: center; gap: 8px;}
.sidebar-header svg { width: 20px; height: 20px; }
.nav-links { list-style: none; padding: 1rem 0.5rem; }
.nav-links li a { display: flex; align-items: center; gap: 10px; padding: 0.75rem 1rem; color: var(--text-main); text-decoration: none; border-radius: var(--radius); margin-bottom: 0.25rem; font-weight: 500; transition: all 0.2s; }
.nav-links li a svg { width: 18px; height: 18px; color: var(--text-muted); }
.nav-links li a:hover { background-color: #F9FAFB; }
.nav-links li a.active { background-color: #EFF6FF; color: var(--accent); }
.nav-links li a.active svg { color: var(--accent); }

/* Editor Specific */
.editor-layout { display: flex; flex: 1; }
.toolbar { width: 80px; background-color: var(--bg-panel); border-right: 1px solid var(--border); display: flex; flex-direction: column; align-items: center; padding: 1.5rem 0; gap: 1rem; box-shadow: var(--shadow-sm); z-index: 5; }

.canvas-container-wrapper { flex: 1; display: flex; flex-direction: column; background-color: var(--bg-canvas); overflow: hidden; position: relative; }
.canvas-header { padding: 1rem 1.5rem; background-color: var(--bg-panel); border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; box-shadow: var(--shadow-sm); z-index: 5; }
.canvas-header .title { font-weight: 600; font-size: 1.1rem; color: var(--text-main); }
.canvas-header .actions { display: flex; gap: 0.75rem; }

.title-input {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-main);
    border: 1px solid transparent;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    background: transparent;
    outline: none;
    transition: all 0.2s;
    width: 250px;
}
.title-input:hover, .title-input:focus {
    border-color: var(--border);
    background: #f8fafc;
}

.canvas-area {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: auto;
    padding: 2rem;
    background-image: radial-gradient(#d1d5db 1px, transparent 1px);
    background-size: 20px 20px;
    background-color: #eaedf2;
    position: relative;
}

.zoom-controls {
    position: absolute;
    bottom: 20px;
    right: 20px;
    background: white;
    border-radius: 20px;
    padding: 0.25rem 0.5rem;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    z-index: 10;
}
.zoom-controls span {
    font-size: 0.875rem;
    font-weight: 500;
    min-width: 3rem;
    text-align: center;
}

.canvas-bg { background-color: #fff; box-shadow: var(--shadow-md); border: 1px solid #e5e7eb; position: relative; }

.properties-panel { width: 320px; background-color: var(--bg-panel); border-left: 1px solid var(--border); padding: 0; overflow-y: auto; box-shadow: -2px 0 10px rgba(0,0,0,0.02); z-index: 5; }
.prop-section { border-bottom: 1px solid var(--border); padding: 1.5rem; }
.prop-section h3 { font-size: 0.75rem; font-weight: 700; color: var(--text-muted); margin-bottom: 1rem; text-transform: uppercase; letter-spacing: 0.05em; }
.prop-row { display: flex; flex-direction: column; gap: 0.4rem; margin-bottom: 1rem; }
.prop-row:last-child { margin-bottom: 0; }
.prop-row label { font-size: 0.85rem; font-weight: 500; color: var(--text-main); }
.prop-row input, .prop-row select { width: 100%; padding: 0.6rem; background-color: #F9FAFB; border: 1px solid var(--border); color: var(--text-main); border-radius: var(--radius); font-size: 0.9rem; transition: border 0.2s; }
.prop-row input:focus, .prop-row select:focus { outline: none; border-color: var(--accent); }

/* Text Formatting Toolbar */
.text-format-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 1rem;
    padding: 6px;
    background: #F3F4F6;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}
.text-format-bar button {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.15s;
}
.text-format-bar button:hover {
    background: #E5E7EB;
}
.text-format-bar button.active {
    background: var(--accent);
    color: #fff;
}
.text-format-bar select {
    height: 32px;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0 4px;
    font-size: 0.8rem;
    background: #fff;
    color: var(--text-main);
    cursor: pointer;
}
.text-format-bar .separator {
    width: 1px;
    background: var(--border);
    margin: 4px 2px;
}

/* Horizontal prop row for smaller inputs like X/Y */
.prop-row-horizontal { display: flex; gap: 1rem; margin-bottom: 1rem; }
.prop-row-horizontal .prop-row { flex: 1; margin-bottom: 0; }

/* Products Table */
.content-area { flex: 1; padding: 2.5rem; overflow-y: auto; background-color: var(--bg-app); }
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; }
.page-header h2 { font-size: 1.5rem; font-weight: 700; color: var(--text-main); }

.table-container { background: var(--bg-panel); border-radius: var(--radius); box-shadow: var(--shadow-sm); border: 1px solid var(--border); overflow: hidden; }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { padding: 1rem 1.5rem; text-align: left; border-bottom: 1px solid var(--border); font-size: 0.95rem; }
.data-table th { background-color: #F9FAFB; color: var(--text-muted); font-weight: 600; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; border-bottom: 2px solid var(--border); }
.data-table tbody tr:hover { background-color: #F9FAFB; }
.data-table tbody tr:last-child td { border-bottom: none; }

.action-buttons { display: flex; gap: 0.5rem; }

/* Modal Overlay */
.modal-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(17, 24, 39, 0.6); backdrop-filter: blur(4px); z-index: 1000; justify-content: center; align-items: center; opacity: 0; transition: opacity 0.2s; }
.modal-overlay.active { display: flex; opacity: 1; }

/* Print Modal & Settings */
.modal {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 9999;
    align-items: center; justify-content: center;
}
.modal.active { display: flex; }
.modal-content {
    background: var(--bg-panel);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 450px;
}
.modal-content h2 { font-size: 1.25rem; font-weight: 700; margin-bottom: 1rem; color: var(--text-main); }
.modal-content h3 { font-size: 1rem; font-weight: 600; margin-bottom: 0.75rem; color: var(--text-main); }
.modal-actions { display: flex; justify-content: flex-end; gap: 1rem; margin-top: 2rem; }

/* ===== PRINT CONTAINER: hidden on screen ===== */
#printContainer {
    position: fixed;
    left: -9999px;
    top: 0;
    visibility: hidden;
}

/* ===== PRINT STYLES ===== */
@media print {
    body > * {
        display: none !important;
    }
    #printContainer {
        display: block !important;
        visibility: visible !important;
        position: static !important;
        left: auto !important;
        width: auto !important;
        margin: 0 !important;
        padding: 0 !important;
    }
}

/* Toast Notifications */
#toastContainer { position: fixed; bottom: 2rem; right: 2rem; z-index: 2000; display: flex; flex-direction: column; gap: 0.5rem; }
.toast { background: var(--bg-panel); border-left: 4px solid var(--accent); padding: 1rem 1.5rem; border-radius: var(--radius); box-shadow: var(--shadow-lg); color: var(--text-main); font-size: 0.95rem; font-weight: 500; display: flex; align-items: center; gap: 0.75rem; transform: translateX(120%); transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
.toast.show { transform: translateX(0); }
.toast.error { border-left-color: var(--danger); }
.toast.success { border-left-color: var(--success); }