/* ==================== IFRAME OPTIMIZATION ==================== */
html, body {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
}

body {
    overflow-y: auto;
}

/* Hide scrollbar but keep functionality */
html::-webkit-scrollbar { width: 0; height: 0; }
html { scrollbar-width: none; -ms-overflow-style: none; }

/* ==================== CSS STYLES ==================== */

:root {
    --primary: #ff5722;
    --primary-dark: #e64a19;
    --primary-light: #ff8a65;
    --success: #00c853;
    --success-dark: #00a844;
    --warning: #ffc107;
    --danger: #f44336;
    --bg-dark: #1a1a2e;
    --bg-card: #16213e;
    --bg-card-hover: #1f3460;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --border: rgba(255,255,255,0.1);
    --glow: rgba(255, 87, 34, 0.3);
    --gradient-primary: linear-gradient(135deg, #ff5722 0%, #ff8a65 100%);
    --gradient-success: linear-gradient(135deg, #00c853 0%, #69f0ae 100%);
    --gradient-bg: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.roi-calculator * { box-sizing: border-box; margin: 0; padding: 0; }
.roi-calculator { font-family: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, sans-serif; background: var(--gradient-bg); min-height: 100vh; color: var(--text-primary); line-height: 1.6; }
.roi-calculator .container { max-width: 1400px; margin: 0 auto; padding: 40px 20px; }

.roi-calculator .header { text-align: center; margin-bottom: 50px; position: relative; }
.roi-calculator .header::before { content: ''; position: absolute; top: -100px; left: 50%; transform: translateX(-50%); width: 600px; height: 600px; background: radial-gradient(circle, var(--glow) 0%, transparent 70%); pointer-events: none; z-index: 0; }
.roi-calculator .header h1 { font-family: 'Montserrat', sans-serif; font-size: clamp(32px, 5vw, 48px); font-weight: 800; background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: 12px; position: relative; z-index: 1; }
.roi-calculator .header p { color: var(--text-secondary); font-size: 18px; max-width: 600px; margin: 0 auto; position: relative; z-index: 1; }

.roi-calculator .platform-section { margin-bottom: 40px; }
.roi-calculator .section-label { font-family: 'Montserrat', sans-serif; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 2px; color: var(--primary); margin-bottom: 16px; }
.roi-calculator .platform-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.roi-calculator .platform-card { background: var(--bg-card); border: 2px solid var(--border); border-radius: 16px; padding: 28px; cursor: pointer; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); position: relative; overflow: hidden; }
.roi-calculator .platform-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--gradient-primary); opacity: 0; transition: opacity 0.3s; }
.roi-calculator .platform-card:hover { background: var(--bg-card-hover); transform: translateY(-4px); box-shadow: 0 20px 40px rgba(0,0,0,0.3); }
.roi-calculator .platform-card.selected { border-color: var(--primary); background: rgba(255, 87, 34, 0.1); }
.roi-calculator .platform-card.selected::before { opacity: 1; }
.roi-calculator .platform-radio { position: absolute; opacity: 0; }
.roi-calculator .platform-badge { display: inline-block; background: var(--gradient-primary); color: white; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; padding: 4px 12px; border-radius: 20px; margin-bottom: 16px; }
.roi-calculator .platform-title { font-family: 'Montserrat', sans-serif; font-size: 28px; font-weight: 700; margin-bottom: 8px; }
.roi-calculator .platform-price { font-family: 'Montserrat', sans-serif; font-size: 36px; font-weight: 800; color: var(--primary); margin-bottom: 4px; }
.roi-calculator .platform-price span { font-size: 14px; font-weight: 500; color: var(--text-secondary); }
.roi-calculator .platform-description { color: var(--text-secondary); font-size: 14px; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); }
.roi-calculator .platform-features { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.roi-calculator .feature-tag { background: rgba(255,255,255,0.05); padding: 4px 10px; border-radius: 6px; font-size: 12px; color: var(--text-secondary); }

.roi-calculator .ai-banner { background: linear-gradient(90deg, rgba(255,87,34,0.2) 0%, rgba(255,138,101,0.1) 100%); border: 1px solid rgba(255,87,34,0.3); border-radius: 12px; padding: 20px; text-align: center; margin: 30px 0; display: flex; align-items: center; justify-content: center; gap: 12px; }
.roi-calculator .ai-icon { width: 40px; height: 40px; background: var(--gradient-primary); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 20px; }
.roi-calculator .ai-banner-text { font-size: 16px; }
.roi-calculator .ai-banner-text strong { color: var(--primary); }

.roi-calculator .user-quantity-section { background: var(--bg-card); border-radius: 16px; padding: 24px; margin-bottom: 30px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px; }
.roi-calculator .quantity-label-group { display: flex; align-items: center; gap: 12px; }
.roi-calculator .quantity-icon { width: 48px; height: 48px; background: rgba(255,87,34,0.2); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 24px; }
.roi-calculator .quantity-label-text h3 { font-family: 'Montserrat', sans-serif; font-size: 18px; font-weight: 600; }
.roi-calculator .quantity-label-text p { color: var(--text-secondary); font-size: 13px; }
.roi-calculator .quantity-control { display: flex; align-items: center; gap: 12px; }
.roi-calculator .quantity-btn { width: 44px; height: 44px; border: 2px solid var(--primary); background: transparent; border-radius: 10px; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 24px; color: var(--primary); transition: all 0.2s; }
.roi-calculator .quantity-btn:hover { background: var(--primary); color: white; }
.roi-calculator .quantity-input { width: 100px; height: 44px; text-align: center; border: 2px solid var(--border); border-radius: 10px; font-size: 20px; font-weight: 700; background: rgba(255,255,255,0.05); color: white; font-family: 'Montserrat', sans-serif; }
.roi-calculator .quantity-input:focus { outline: none; border-color: var(--primary); }

.roi-calculator .section { background: var(--bg-card); border-radius: 16px; padding: 28px; margin-bottom: 24px; }
.roi-calculator .section-title { font-family: 'Montserrat', sans-serif; font-size: 22px; font-weight: 700; margin-bottom: 24px; display: flex; align-items: center; gap: 12px; }
.roi-calculator .section-title-icon { width: 36px; height: 36px; background: rgba(255,87,34,0.2); border-radius: 8px; display: flex; align-items: center; justify-content: center; }

.roi-calculator .product-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.roi-calculator .product-item { background: rgba(255,255,255,0.03); border: 1px solid var(--border); border-radius: 12px; padding: 20px; transition: all 0.3s; }
.roi-calculator .product-item:hover { background: rgba(255,255,255,0.05); }
.roi-calculator .product-item.selected { border-color: var(--primary); background: rgba(255,87,34,0.1); }
.roi-calculator .product-header { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 12px; }
.roi-calculator .product-checkbox-wrapper { position: relative; width: 24px; height: 24px; flex-shrink: 0; }
.roi-calculator .product-checkbox { position: absolute; opacity: 0; width: 100%; height: 100%; cursor: pointer; z-index: 1; }
.roi-calculator .checkbox-custom { position: absolute; top: 0; left: 0; width: 24px; height: 24px; border: 2px solid var(--border); border-radius: 6px; transition: all 0.2s; }
.roi-calculator .product-checkbox:checked + .checkbox-custom { background: var(--primary); border-color: var(--primary); }
.roi-calculator .product-checkbox:checked + .checkbox-custom::after { content: '✓'; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); color: white; font-size: 14px; font-weight: bold; }
.roi-calculator .product-info { flex-grow: 1; }
.roi-calculator .product-title { font-family: 'Montserrat', sans-serif; font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.roi-calculator .product-price { color: var(--primary); font-weight: 700; font-size: 18px; }
.roi-calculator .product-price span { font-size: 12px; font-weight: 400; color: var(--text-secondary); }
.roi-calculator .product-description { color: var(--text-secondary); font-size: 13px; margin-top: 8px; }
.roi-calculator .product-quantity { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); display: none; }
.roi-calculator .product-quantity.visible { display: flex; align-items: center; gap: 12px; }
.roi-calculator .product-quantity .quantity-btn { width: 32px; height: 32px; font-size: 18px; }
.roi-calculator .product-quantity .quantity-input { width: 70px; height: 32px; font-size: 16px; }

.roi-calculator .custom-select { width: 100%; padding: 14px 16px; background: rgba(255,255,255,0.05); border: 2px solid var(--border); border-radius: 10px; color: white; font-size: 15px; cursor: pointer; transition: all 0.2s; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23a0aec0' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 16px center; }
.roi-calculator .custom-select:focus { outline: none; border-color: var(--primary); }
.roi-calculator .custom-select option { background: var(--bg-dark); color: white; }

.roi-calculator .roi-inputs-section { background: linear-gradient(135deg, rgba(255,87,34,0.1) 0%, rgba(0,200,83,0.1) 100%); border: 1px solid rgba(255,87,34,0.2); }
.roi-calculator .roi-inputs-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.roi-calculator .input-group { position: relative; }
.roi-calculator .input-group label { display: block; font-size: 13px; font-weight: 600; color: var(--text-secondary); margin-bottom: 8px; }
.roi-calculator .input-group input { width: 100%; padding: 14px 16px; background: rgba(255,255,255,0.05); border: 2px solid var(--border); border-radius: 10px; color: white; font-size: 16px; font-weight: 600; font-family: 'Montserrat', sans-serif; transition: all 0.2s; }
.roi-calculator .input-group input:focus { outline: none; border-color: var(--primary); background: rgba(255,255,255,0.08); }
.roi-calculator .input-hint { font-size: 11px; color: var(--text-secondary); margin-top: 6px; opacity: 0.8; }

.roi-calculator .total-section { background: linear-gradient(135deg, var(--bg-card) 0%, rgba(255,87,34,0.15) 100%); border: 2px solid var(--primary); position: relative; overflow: hidden; }
.roi-calculator .total-section::before { content: ''; position: absolute; top: 0; right: 0; width: 300px; height: 300px; background: radial-gradient(circle, var(--glow) 0%, transparent 70%); pointer-events: none; }
.roi-calculator .total-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; position: relative; z-index: 1; }
.roi-calculator .total-item { text-align: center; padding: 20px; background: rgba(0,0,0,0.2); border-radius: 12px; }
.roi-calculator .total-item-label { font-size: 13px; color: var(--text-secondary); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 1px; }
.roi-calculator .total-item-value { font-family: 'Montserrat', sans-serif; font-size: 28px; font-weight: 800; color: var(--primary); }
.roi-calculator .total-item-value.highlight { color: var(--success); }
.roi-calculator .total-item-sub { font-size: 12px; color: var(--text-secondary); margin-top: 4px; }
.roi-calculator .warning-message { background: rgba(244, 67, 54, 0.2); border: 1px solid var(--danger); border-radius: 8px; padding: 12px 16px; margin-top: 20px; display: none; align-items: center; gap: 10px; }
.roi-calculator .warning-message.active { display: flex; }
.roi-calculator .warning-icon { font-size: 20px; }

.roi-calculator .calculate-btn { width: 100%; padding: 18px 32px; background: var(--gradient-primary); border: none; border-radius: 12px; color: white; font-family: 'Montserrat', sans-serif; font-size: 18px; font-weight: 700; cursor: pointer; transition: all 0.3s; text-transform: uppercase; letter-spacing: 1px; margin: 30px 0; position: relative; overflow: hidden; }
.roi-calculator .calculate-btn::before { content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent); transition: left 0.5s; }
.roi-calculator .calculate-btn:hover::before { left: 100%; }
.roi-calculator .calculate-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(255,87,34,0.4); }

.roi-calculator .roi-results { display: none; animation: fadeIn 0.5s ease; }
.roi-calculator .roi-results.visible { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

.roi-calculator .roi-summary { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; margin-bottom: 30px; }
.roi-calculator .roi-card { background: var(--bg-card); border-radius: 16px; padding: 24px; position: relative; overflow: hidden; border: 1px solid var(--border); transition: all 0.3s; }
.roi-calculator .roi-card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(0,0,0,0.3); }
.roi-calculator .roi-card.primary { border-color: var(--primary); background: linear-gradient(135deg, rgba(255,87,34,0.2) 0%, var(--bg-card) 100%); }
.roi-calculator .roi-card.success { border-color: var(--success); background: linear-gradient(135deg, rgba(0,200,83,0.2) 0%, var(--bg-card) 100%); }
.roi-calculator .roi-card-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 16px; }
.roi-calculator .roi-card.primary .roi-card-icon { background: rgba(255,87,34,0.2); }
.roi-calculator .roi-card.success .roi-card-icon { background: rgba(0,200,83,0.2); }
.roi-calculator .roi-card-title { font-size: 14px; color: var(--text-secondary); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 1px; }
.roi-calculator .roi-card-value { font-family: 'Montserrat', sans-serif; font-size: 36px; font-weight: 800; margin-bottom: 8px; }
.roi-calculator .roi-card.primary .roi-card-value { color: var(--primary); }
.roi-calculator .roi-card.success .roi-card-value { color: var(--success); }
.roi-calculator .roi-card-description { font-size: 13px; color: var(--text-secondary); line-height: 1.5; }

.roi-calculator .metrics-section { margin-top: 30px; }
.roi-calculator .metrics-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.roi-calculator .metric-block { background: var(--bg-card); border-radius: 16px; padding: 24px; border: 1px solid var(--border); }
.roi-calculator .metric-block-title { font-family: 'Montserrat', sans-serif; font-size: 16px; font-weight: 700; margin-bottom: 20px; display: flex; align-items: center; gap: 10px; }
.roi-calculator .metric-row { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--border); }
.roi-calculator .metric-row:last-child { border-bottom: none; }
.roi-calculator .metric-label { font-size: 14px; color: var(--text-secondary); display: flex; align-items: center; gap: 8px; }
.roi-calculator .metric-value { font-family: 'Montserrat', sans-serif; font-size: 16px; font-weight: 700; }
.roi-calculator .metric-value.positive { color: var(--success); }
.roi-calculator .metric-value.negative { color: var(--danger); }
.roi-calculator .metric-value.neutral { color: var(--primary); }

.roi-calculator .progress-container { margin-top: 16px; }
.roi-calculator .progress-label { display: flex; justify-content: space-between; font-size: 12px; color: var(--text-secondary); margin-bottom: 8px; }
.roi-calculator .progress-bar { height: 8px; background: rgba(255,255,255,0.1); border-radius: 4px; overflow: hidden; }
.roi-calculator .progress-fill { height: 100%; background: var(--gradient-success); border-radius: 4px; transition: width 0.5s ease; }

.roi-calculator .recommendations { margin-top: 30px; }
.roi-calculator .recommendation-card { background: linear-gradient(135deg, rgba(0,200,83,0.1) 0%, var(--bg-card) 100%); border: 1px solid rgba(0,200,83,0.3); border-radius: 16px; padding: 24px; display: flex; gap: 20px; align-items: flex-start; }
.roi-calculator .recommendation-icon { width: 56px; height: 56px; background: rgba(0,200,83,0.2); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 28px; flex-shrink: 0; }
.roi-calculator .recommendation-content h4 { font-family: 'Montserrat', sans-serif; font-size: 18px; font-weight: 700; margin-bottom: 8px; color: var(--success); }
.roi-calculator .recommendation-content p { color: var(--text-secondary); font-size: 14px; line-height: 1.6; }

/* Tablet */
@media (max-width: 1024px) {
    .roi-calculator .container { padding: 30px 16px; }
    .roi-calculator .platform-cards { grid-template-columns: 1fr; }
    .roi-calculator .roi-summary { grid-template-columns: repeat(2, 1fr); }
    .roi-calculator .metrics-grid { grid-template-columns: 1fr; }
}

/* Mobile */
@media (max-width: 768px) {
    .roi-calculator .container { padding: 20px 12px; }
    .roi-calculator .header { margin-bottom: 30px; }
    .roi-calculator .header h1 { font-size: 24px; }
    .roi-calculator .header p { font-size: 14px; }
    .roi-calculator .platform-card { padding: 20px; }
    .roi-calculator .platform-title { font-size: 22px; }
    .roi-calculator .platform-price { font-size: 28px; }
    .roi-calculator .platform-description { font-size: 13px; }
    .roi-calculator .section { padding: 20px 16px; margin-bottom: 16px; }
    .roi-calculator .section-title { font-size: 18px; margin-bottom: 16px; }
    .roi-calculator .user-quantity-section { flex-direction: column; text-align: center; padding: 20px 16px; }
    .roi-calculator .quantity-control { width: 100%; justify-content: center; }
    .roi-calculator .product-grid { grid-template-columns: 1fr; }
    .roi-calculator .roi-inputs-grid { grid-template-columns: 1fr; gap: 16px; }
    .roi-calculator .total-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .roi-calculator .total-item { padding: 16px 12px; }
    .roi-calculator .total-item-value { font-size: 20px; }
    .roi-calculator .total-item-label { font-size: 11px; }
    .roi-calculator .calculate-btn { padding: 16px 24px; font-size: 16px; margin: 20px 0; }
    .roi-calculator .roi-summary { grid-template-columns: 1fr; gap: 16px; }
    .roi-calculator .roi-card { padding: 20px; }
    .roi-calculator .roi-card-value { font-size: 28px; }
    .roi-calculator .roi-card-title { font-size: 12px; }
    .roi-calculator .metric-block { padding: 16px; }
    .roi-calculator .metric-row { padding: 10px 0; }
    .roi-calculator .metric-label { font-size: 13px; }
    .roi-calculator .metric-value { font-size: 14px; }
    .roi-calculator .recommendation-card { flex-direction: column; padding: 20px; gap: 16px; }
    .roi-calculator .recommendation-icon { width: 48px; height: 48px; font-size: 24px; }
    .roi-calculator .ai-banner { flex-direction: column; padding: 16px; gap: 8px; }
    .roi-calculator .ai-banner-text { font-size: 14px; }
}

/* Small mobile */
@media (max-width: 380px) {
    .roi-calculator .container { padding: 16px 10px; }
    .roi-calculator .header h1 { font-size: 20px; }
    .roi-calculator .platform-title { font-size: 20px; }
    .roi-calculator .platform-price { font-size: 24px; }
    .roi-calculator .total-grid { grid-template-columns: 1fr; }
    .roi-calculator .quantity-input { width: 80px; }
}

@media print {
    .roi-calculator { background: white; color: black; }
    .roi-calculator .calculate-btn { display: none; }
}