:root {
    /* --- Apple Color Palette (Light) --- */
    --c-bg-app: #F5F5F7;        /* System Grey 6 */
    --c-bg-sidebar: #FFFFFF;     /* System Background */
    --c-bg-card: #FFFFFF;
    --c-bg-input: #F2F2F7;      /* System Grey 6/5 */
    
    --c-text-primary: #1D1D1F;
    --c-text-secondary: #86868B;
    --c-text-tertiary: #C7C7CC;
    
    --c-accent: #0071E3;        /* iOS Blue */
    --c-accent-hover: #0077ED;
    --c-danger: #FF3B30;        /* System Red */
    --c-success: #34C759;       /* System Green */
    
    --c-border: #D1D1D6;        /* System Grey 4 */
    --c-divider: #E5E5EA;       /* System Grey 5 */
    
    --shadow-sm: 0 2px 5px rgba(0,0,0,0.05);
    --shadow-md: 0 5px 15px rgba(0,0,0,0.08);
    --shadow-lg: 0 15px 35px rgba(0,0,0,0.1);
    
    --radius-s: 8px;
    --radius-m: 12px;
    --radius-l: 18px;
    --radius-xl: 24px;
    
    --font-stack: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    
    --header-height: 60px;
    --trans-speed: 0.3s;
}

/* --- Dark Mode Variables --- */
body.dark-mode {
    --c-bg-app: #000000;
    --c-bg-sidebar: #1C1C1E;    /* System Grey 6 Dark */
    --c-bg-card: #2C2C2E;       /* System Grey 5 Dark */
    --c-bg-input: #3A3A3C;      /* System Grey 4 Dark */
    
    --c-text-primary: #F5F5F7;
    --c-text-secondary: #98989D;
    
    --c-border: #38383A;
    --c-divider: #2C2C2E;
    
    --shadow-sm: 0 2px 5px rgba(0,0,0,0.2);
    --shadow-md: 0 5px 15px rgba(0,0,0,0.3);
    --shadow-lg: 0 15px 35px rgba(0,0,0,0.4);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-stack);
    background-color: var(--c-bg-app);
    color: var(--c-text-primary);
    height: 100vh;
    overflow: hidden;
    transition: background-color var(--trans-speed), color var(--trans-speed);
    display: flex;
    justify-content: center;
    align-items: center;
}

/* --- Layout Structure --- */
.app-container {
    display: flex;
    width: 100vw;
    height: 100vh;
}

/* --- Editor Pane (Sidebar) --- */
.editor-pane {
    width: 420px;
    min-width: 380px;
    height: 100vh;
    overflow: hidden;
    background-color: var(--c-bg-sidebar);
    border-right: 1px solid var(--c-border);
    display: flex;
    flex-direction: column;
    padding: 0;
    z-index: 20;
    transition: background-color var(--trans-speed), border-color var(--trans-speed);
}

.editor-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    border-bottom: 1px solid var(--c-divider);
    flex-shrink: 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-icon {
    font-size: 20px;
}

.brand-title {
    font-size: 17px;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--c-text-primary);
}

.status-badge {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.05em;
    background: var(--c-bg-input);
    color: var(--c-text-secondary);
    border: 1px solid var(--c-border);
    padding: 6px 12px;
    border-radius: 20px;
    text-transform: uppercase;
    align-self: flex-start;
    margin-bottom: 24px;
    display: inline-block;
    transition: all 0.2s;
}

.status-badge.pro {
    background: linear-gradient(135deg, #FFD700, #FDB931);
    color: #5c4b00;
    border: 1px solid rgba(0,0,0,0.05);
    box-shadow: 0 2px 5px rgba(255, 215, 0, 0.3);
}

.mode-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    color: var(--c-text-secondary);
    transition: color 0.2s, background-color 0.2s;
    font-size: 18px;
}
.mode-toggle:hover {
    background-color: var(--c-bg-input);
    color: var(--c-text-primary);
}

.text-btn {
    background: none;
    border: none;
    color: var(--c-accent);
    cursor: pointer;
    font-size: 11px;
    font-weight: 500;
}
.text-btn:hover { text-decoration: underline; }

/* Visual Editor Tools */
.visual-tool-item {
    background: #fff;
    border: 1px solid #ddd;
    padding: 10px;
    border-radius: 6px;
    cursor: grab;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s;
    user-select: none;
    display: flex; align-items: center; gap: 8px;
}
.visual-tool-item:hover {
    border-color: var(--c-accent);
    transform: translateX(2px);
    background: #f9f9f9;
}

.logic-node {
    position: absolute;
    background: #fff;
    border: 1px solid #ccc;
    border-radius: 8px;
    width: 180px;
    padding: 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    cursor: grab;
    user-select: none;
    transition: box-shadow 0.2s, border-color 0.2s;
    z-index: 10;
}
.logic-node.selected {
    border: 2px solid var(--c-accent);
    box-shadow: 0 8px 20px rgba(0,113,227,0.2);
    z-index: 20;
}
.logic-node-header {
    padding: 8px 12px;
    background: #f5f5f7;
    border-bottom: 1px solid #eee;
    border-radius: 8px 8px 0 0;
    font-size: 12px;
    font-weight: 700;
    color: #555;
    display: flex; align-items: center; justify-content: space-between;
}
.logic-node-body {
    padding: 10px 12px;
    font-size: 11px;
    color: #666;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

/* Section Titles */
.section-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--c-text-secondary);
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

/* Controls */
.controls {
    padding: 16px 24px 0 24px;
    flex-shrink: 0;
}

select.native-select {
    width: 100%;
    background-color: var(--c-bg-input);
    color: var(--c-text-primary);
    border: none;
    font-family: inherit;
    font-size: 15px;
    padding: 10px 12px;
    border-radius: var(--radius-m);
    outline: none;
    appearance: none; /* Remove default arrow */
    -webkit-appearance: none;
    -moz-appearance: none;
    cursor: pointer;
    border: 1px solid var(--c-border);
    /* Custom Arrow SVG encoded */
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2386868b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    transition: 0.2s;
}

select.native-select:focus {
    border-color: var(--c-accent);
    background-color: var(--c-bg-card);
}

/* --- Block List --- */
.blocks-list {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    /* Ensure content doesn't get cut off */
    padding-bottom: 80px; 
}

/* Custom Scrollbar */
.blocks-list::-webkit-scrollbar {
    width: 8px;
}
.blocks-list::-webkit-scrollbar-track {
    background: transparent;
}
.blocks-list::-webkit-scrollbar-thumb {
    background-color: rgba(134, 134, 139, 0.3); 
    border-radius: 4px;
}

/* Editor Item Cards */
.block-item {
    background-color: var(--c-bg-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-m);
    padding: 16px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
    position: relative;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.block-item:hover {
    border-color: var(--c-accent);
    box-shadow: var(--shadow-md);
}

.block-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-size: 11px;
    color: var(--c-text-secondary);
    font-weight: 600;
    text-transform: uppercase;
}

.block-type-badge {
    color: var(--c-accent);
    background: rgba(0, 113, 227, 0.1);
    padding: 4px 8px;
    border-radius: 6px;
}

.delete-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--c-text-tertiary);
    font-size: 14px;
    transition: color 0.2s;
}
.delete-btn:hover { color: var(--c-danger); }

/* Inputs within blocks */
.block-input {
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--radius-s);
    border: 1px solid var(--c-border);
    background: var(--c-bg-input);
    color: var(--c-text-primary);
    font-size: 14px;
    outline: none;
    transition: 0.2s;
    font-family: inherit;
    margin-bottom: 8px;
}
.block-input:focus {
    border-color: var(--c-accent);
    background: var(--c-bg-card);
}

textarea.block-input {
    resize: vertical;
    min-height: 80px;
    line-height: 1.5;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--c-text-secondary);
    font-size: 14px;
}

/* --- Editor Footer (Sticky bottom) --- */
.editor-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--c-divider);
    background: var(--c-bg-sidebar);
    flex-shrink: 0;
}

.pro-section {
    background: linear-gradient(135deg, #FFD700 0%, #FDB931 100%);
    border-radius: var(--radius-m);
    padding: 16px;
    color: #4a3b00;
    margin-bottom: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.pro-section h3 { font-size: 14px; margin: 0; font-weight: 700;}
.pro-section p { font-size: 12px; opacity: 0.8; margin-bottom: 0; display: none;} /* Hide p for simpler look */

.promo-btn {
    background-color: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    color: #4a3b00;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.promo-btn:hover {
    background-color: #ffffff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.actions {
    display: flex;
    flex-direction: column;
    gap: 8px; 
}
.action-row {
    display: flex;
    gap: 8px;
}

/* Buttons */
.btn {
    width: 100%;
    border: none;
    padding: 12px;
    border-radius: var(--radius-m);
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    text-align: center;
}
.btn:active { transform: scale(0.98); }

.btn-primary { 
    background-color: var(--c-accent); 
    color: white; 
}
.btn-primary:hover { background-color: var(--c-accent-hover); }

.btn-secondary { 
    background-color: var(--c-bg-input); 
    color: var(--c-text-primary); 
}
.btn-secondary:hover { background-color: var(--c-divider); }

.btn-outline { 
    background: transparent; 
    border: 1px solid var(--c-border); 
    color: var(--c-text-primary); 
}
.btn-export { 
    background: var(--c-text-primary); 
    color: var(--c-bg-card); 
}

/* --- Preview Pane (Right) --- */
.preview-pane {
    flex: 1;
    background-color: var(--c-bg-app);
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    transition: background-color var(--trans-speed);
}

/* Phone Mockup */
.phone-mockup {
    width: 375px;
    height: 812px;
    border-radius: 50px;
    background: #000;
    padding: 12px;
    box-shadow: var(--shadow-lg);
    position: relative;
    border: 8px solid #2c2c2e;
}

.phone-notch {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 30px;
    background: #2c2c2e;
    border-bottom-left-radius: 20px;
    border-bottom-right-radius: 20px;
    z-index: 5;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #ffffff;
    border-radius: 40px;
    overflow-y: auto;
    overflow-x: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
}

/* Hide scrollbar in phone */
.phone-screen::-webkit-scrollbar { display: none; }

.preview-content {
    flex: 1;
    padding: 50px 20px 20px 20px; /* Top padding for notch */
}

.mt-branding {
    text-align: center;
    padding: 20px;
    color: #888;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* --- Themes System for Preview --- */
.phone-screen {
    /* DEFAULT (Standard) */
    --t-bg: #ffffff;
    --t-text: #1d1d1f;
    --t-card: #f5f5f7;
    --t-card-text: #1d1d1f;
    --t-card-sub: #86868b;
    --t-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    background-color: var(--t-bg);
    color: var(--t-text);
    font-family: var(--t-font);
    transition: background 0.3s, color 0.3s;
}

/* Dark mode for standard theme */
.phone-screen.dark-mode-preview {
    --t-bg: #000000;
    --t-text: #f5f5f7;
    --t-card: #1c1c1e;
    --t-card-text: #f5f5f7;
    --t-card-sub: #86868b;
}

.phone-screen[data-theme="ocean"] {
    --t-bg: #e0f7fa;
    --t-text: #006064;
    --t-card: #b2ebf2;
    --t-card-text: #006064;
    --t-card-sub: #00838f;
    --t-font: "Verdana", sans-serif;
}

.phone-screen[data-theme="retro"] {
    --t-bg: #111111;
    --t-text: #33ff33;
    --t-card: #000000;
    --t-card-text: #33ff33;
    --t-card-sub: #22aa22;
    --t-font: "Courier New", Courier, monospace;
}
/* Retro border fix */
.phone-screen[data-theme="retro"] .user-link {
    border: 1px solid #33ff33;
}

.phone-screen[data-theme="sunset"] {
    /* Yellow-Orange Gradient (Sunset) */
    --t-bg: linear-gradient(135deg, #FFB75E 0%, #ED8F03 100%);
    --t-text: #ffffff; 
    --t-card: #ffffff;
    --t-card-text: #d35400;
    --t-card-sub: #e67e22;
    --t-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.phone-screen[data-theme="forest"] {
    --t-bg: #1b261b;
    --t-text: #e0e8e0;
    --t-card: #2c3e2c;
    --t-card-text: #e0e8e0;
    --t-card-sub: #8ca08c;
    --t-font: "Trebuchet MS", sans-serif;
}

/* User Content inside Phone */
.user-text h1 { font-size: 28px; font-weight: 700; margin-bottom: 16px; line-height: 1.2; color: var(--t-text); letter-spacing: -0.5px; }
.user-text h2 { font-size: 22px; font-weight: 600; margin-top: 24px; margin-bottom: 12px; color: var(--t-text); letter-spacing: -0.3px; }
.user-text p { font-size: 17px; line-height: 1.5; color: var(--t-text); margin-bottom: 16px;}
.user-text code { background: rgba(125,125,125,0.2); padding: 2px 4px; border-radius: 4px; font-family: monospace; font-size: 0.9em; color: var(--t-text); }
.user-text ul, .user-text ol { padding-left: 20px; color: var(--t-text); margin-bottom: 16px; }
.user-text a { color: var(--t-text); text-decoration: underline; }

.user-link {
    display: block;
    text-decoration: none;
    background: var(--t-card);
    padding: 20px;
    border-radius: 18px;
    color: var(--t-card-text);
    font-weight: 600;
    font-size: 16px;
    transition: transform 0.2s, background 0.2s;
    margin-bottom: 12px;
    border: 1px solid transparent; /* Align border box */
}
.user-link:hover {
    transform: scale(0.98);
    opacity: 0.9;
}
.user-link .link-url {
    display: block;
    font-size: 13px;
    color: var(--t-card-sub);
    font-weight: 400;
    margin-top: 4px;
}

/* WhatsApp Block */
.user-whatsapp {
    background-color: #25D366 !important; /* WhatsApp Green */
    color: white !important;
    text-align: center;
    border: none !important;
}
.user-whatsapp .link-url {
    color: rgba(255,255,255,0.8) !important;
}
.phone-screen[data-theme="retro"] .user-whatsapp {
    background-color: transparent !important;
    border: 1px solid #25D366 !important;
    color: #25D366 !important;
}

/* Comparison Table */
.comparison-table {
    border: 1px solid var(--c-border);
    border-radius: 8px;
    overflow: hidden;
    font-size: 14px;
    border-collapse: separate !important; /* Override inline collapse if needed for radius */
    border-spacing: 0;
    display: block; /* Necessary if rows are grids */
}
.comparison-table thead, .comparison-table tbody {
    display: contents; /* Allows rows to be children of table for grid purposes if needed, OR just block */
}

/* Because current HTML uses table/tr/td which are rigid. 
   The Git diff showed display:grid on .c-row. 
   If we apply display:grid to tr, we usually need the table to be display:block or similar to behave nicely 
   or allow the tr to constrain columns. 
*/

.c-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    padding: 10px;
    border-bottom: 1px solid var(--c-border);
    align-items: center;
    color: var(--c-text-primary);
}
.c-row:last-child { border-bottom: none; }

.c-row.header {
    background: var(--c-bg-input);
    font-weight: 600;
    color: var(--c-text-secondary);
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 0.5px;
}

/* Modals */
.modal-backdrop {
    position: fixed;
    top: 0; left: 0; 
    width: 100vw; height: 100vh;
    background: rgba(0,0,0,0.3);
    backdrop-filter: blur(5px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal {
    background: var(--c-bg-card);
    padding: 30px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    width: 400px;
    animation: scaleIn 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    color: var(--c-text-primary); /* Ensure modal text is readable in dark mode */
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}
.modal-header h2 { font-size: 20px; font-weight: 700; color: var(--c-text-primary); }

.close-btn {
    background: var(--c-bg-input);
    border: none;
    width: 30px; height: 30px;
    border-radius: 50%;
    cursor: pointer;
    color: var(--c-text-secondary);
    font-size: 20px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.block-option-btn {
    border: 1px solid var(--c-border);
    border-radius: 12px;
    background: var(--c-bg-input);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--c-text-primary);
    transition: 0.2s;
}
.block-option-btn:hover {
    background: var(--c-bg-card);
    border-color: var(--c-accent);
}

.header-logout-btn {
    background: none;
    border: 1px solid var(--c-danger);
    color: var(--c-danger);
    font-size: 10px;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 6px;
    cursor: pointer;
    text-transform: uppercase;
    transition: all 0.2s;
    height: 24px;
    display: flex;
    align-items: center;
}

.header-logout-btn:hover {
    background: var(--c-danger);
    color: white;
}
/* --- NEW User Blocks --- */
.user-hero {
    text-align: center;
    padding: 40px 20px;
    background: var(--t-card);
    border-radius: 24px;
    margin-bottom: 24px;
    /* Optional: if has image, handles it via inline style or inner img */
}
.user-hero h2 { margin: 0 0 12px 0; font-size: 28px; color: var(--t-card-text); }
.user-hero p { margin: 0; opacity: 0.7; font-size: 17px; color: var(--t-card-sub); line-height: 1.5; }

.user-card {
    background: var(--t-card);
    border-radius: 20px;
    overflow: hidden;
    margin-bottom: 16px;
    /* Simple card shadow often helps separation */
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.user-card-img {
    width: 100%; height: 180px; object-fit: cover; display: block;
}
.user-card-body { padding: 20px; }
.user-card h3 { margin: 0 0 8px 0; font-size: 18px; font-weight: 700; color: var(--t-card-text); }
.user-card p { margin: 0; font-size: 15px; color: var(--t-card-sub); line-height: 1.5; }

.user-testimonial {
    background: var(--t-card);
    padding: 24px;
    border-radius: 20px;
    margin-bottom: 16px;
}
.user-testimonial p { 
    font-size: 18px; 
    line-height: 1.5; 
    margin: 0 0 16px 0; 
    color: var(--t-card-text);
    font-family: serif; /* Looks nice for quotes */
}
.user-testimonial .author { 
    font-size: 14px; 
    font-weight: 700; 
    color: var(--t-card-sub); 
    text-transform: uppercase; 
    letter-spacing: 0.5px;
}

.user-quote {
    border-left: 4px solid var(--c-accent);
    padding: 12px 16px;
    margin: 24px 0;
    background: var(--c-bg-app); /* ensure valid background if needed */
    color: var(--t-text);
    border-radius: 0 12px 12px 0;
}
.user-quote p {
    font-size: 19px;
    line-height: 1.5;
    font-style: italic;
    margin: 0;
}

/* User Button Styles (Themable) */
.user-btn {
    display: block;
    width: 100%;
    padding: 16px;
    border-radius: 14px;
    border: none;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    margin-top: 12px;
    text-align: center;
    transition: transform 0.2s, background-color 0.2s, opacity 0.2s;
    text-decoration: none;
}
.user-btn:active { transform: scale(0.97); }

/* Variants */
.user-btn-filled { background: var(--c-accent); color: #fff; }
.user-btn-outline { background: transparent; border: 2px solid var(--c-accent); color: var(--c-accent); }
.user-btn-soft { background: rgba(0, 113, 227, 0.15); color: var(--c-accent); }
.user-btn-danger { background: var(--c-danger); color: #fff; }
.user-btn-ghost { background: transparent; color: var(--c-accent); padding: 12px; }

/* Sizes */
.user-btn-sm { padding: 10px; font-size: 14px; }
.user-btn-lg { padding: 20px; font-size: 18px; }