/* style.css */
:root {
    --primary: #e74c3c;
    --primary-dark: #c0392b;
    --secondary: #3498db;
    --secondary-dark: #2980b9;
    --success: #27ae60;
    --success-dark: #219a52;
    --expert: #9b59b6;
    --expert-dark: #8e44ad;
    --warning: #f39c12;
    --danger: #e74c3c;
    --light: #f8f9fa;
    --dark: #2c3e50;
    --gray: #95a5a6;
    --gray-light: #ecf0f1;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', 'Roboto', 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--dark) 0%, #34495e 100%);
    color: white;
    padding: 30px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--success));
}

.header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.header p {
    opacity: 0.9;
    font-size: 1.1em;
    max-width: 800px;
    margin: 0 auto;
}

/* Language Selector */
.language-selector {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 100;
}

/* Coffee Link */
.coffee-link {
    position: absolute;
    top: 20px;
    right: 20px;
    background: #ffdd00;
    color: #000;
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(255, 221, 0, 0.3);
}

.coffee-link:hover {
    background: #ffc800;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 200, 0, 0.4);
}

/* Navigation */
.calculator-section {
    padding: 40px;
}

.progress-indicator {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
    position: relative;
    padding: 20px 0;
}

.progress-step {
    text-align: center;
    flex: 1;
    position: relative;
    z-index: 2;
}

.progress-step .step-number {
    width: 50px;
    height: 50px;
    background: var(--gray-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 10px;
    font-weight: bold;
    font-size: 1.2em;
    color: var(--gray);
    transition: var(--transition);
    border: 3px solid white;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

.progress-step.active .step-number {
    background: var(--secondary);
    color: white;
    transform: scale(1.1);
}

.progress-step.completed .step-number {
    background: var(--success);
    color: white;
}

.progress-step .step-label {
    font-size: 0.9em;
    color: var(--gray);
    font-weight: 500;
}

.progress-step.active .step-label {
    color: var(--secondary);
    font-weight: 600;
}

.progress-indicator::before {
    content: '';
    position: absolute;
    top: 45px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gray-light);
    z-index: 1;
}

/* Form Sections */
.form-section {
    display: none;
}

.form-section.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

/* Cards */
.result-card {
    background: white;
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    margin-bottom: 25px;
    border: 1px solid #eee;
    transition: var(--transition);
}

.result-card:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.result-card h3 {
    color: var(--dark);
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 3px solid var(--secondary);
    font-size: 1.4em;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Forms */
.form-group {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark);
    font-size: 1.05em;
}

.form-control {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 16px;
    transition: var(--transition);
    background: white;
}

.form-control:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

/* Buttons */
.btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    text-decoration: none;
}

.btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(231, 76, 60, 0.3);
}

.btn-secondary {
    background: var(--secondary);
}

.btn-secondary:hover {
    background: var(--secondary-dark);
    box-shadow: 0 10px 20px rgba(52, 152, 219, 0.3);
}

.btn-success {
    background: var(--success);
}

.btn-success:hover {
    background: var(--success-dark);
    box-shadow: 0 10px 20px rgba(39, 174, 96, 0.3);
}

.btn-expert {
    background: var(--expert);
}

.btn-expert:hover {
    background: var(--expert-dark);
    box-shadow: 0 10px 20px rgba(155, 89, 182, 0.3);
}

/* Navigation Buttons */
.navigation-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px solid var(--gray-light);
}

/* Expert Mode */
.expert-mode-toggle {
    text-align: center;
    margin: 25px 0;
}

.expert-toggle-btn {
    padding: 12px 25px;
    background: var(--expert);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    font-size: 16px;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.expert-toggle-btn:hover {
    background: var(--expert-dark);
    transform: translateY(-2px);
}

.expert-toggle-btn.active {
    background: var(--expert-dark);
    box-shadow: 0 0 0 3px rgba(155, 89, 182, 0.3);
}

.expert-section {
    background: linear-gradient(135deg, #f8f9fa 0%, #e8f4fd 100%);
    padding: 25px;
    border-radius: var(--radius);
    margin: 25px 0;
    border-left: 5px solid var(--expert);
    display: none;
}

.expert-section.active {
    display: block;
    animation: slideDown 0.3s ease;
}

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

.extinguisher-filters {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 25px;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.extinguisher-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.extinguisher-card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    border: 1px solid #eee;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.extinguisher-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
    border-color: var(--secondary);
}

.extinguisher-card.selected {
    border-color: var(--primary);
    background: #fff5f5;
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.extinguisher-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--gray-light);
}

.extinguisher-type-badge {
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8em;
    font-weight: bold;
    background: var(--secondary);
    color: white;
}

.extinguisher-details {
    margin: 15px 0;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    padding-bottom: 5px;
    border-bottom: 1px dotted #eee;
}

.detail-label {
    font-weight: 500;
    color: var(--gray);
}

.detail-value {
    font-weight: 600;
    color: var(--dark);
}

.extinguisher-quantity {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 15px;
}

.quantity-btn {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    border: 2px solid var(--secondary);
    background: white;
    color: var(--secondary);
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
}

.quantity-btn:hover {
    background: var(--secondary);
    color: white;
}

.quantity-input {
    width: 60px;
    text-align: center;
    padding: 8px;
    border: 2px solid #e1e8ed;
    border-radius: 5px;
    font-weight: bold;
}

/* Results */
.result-section {
    padding: 40px;
    background: var(--light);
    border-top: 5px solid var(--primary);
    display: none;
}

.result-section.active {
    display: block;
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.recommendation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 25px 0;
}

.recommendation-item {
    background: white;
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid var(--secondary);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

/* Tables */
.quotation-table {
    width: 100%;
    border-collapse: collapse;
    margin: 25px 0;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.quotation-table th {
    background: var(--dark);
    color: white;
    padding: 15px;
    text-align: left;
    font-weight: 600;
}

.quotation-table td {
    padding: 15px;
    border-bottom: 1px solid #eee;
}

.quotation-table tr:hover {
    background: #f8f9fa;
}

.total-row {
    background: var(--success) !important;
    color: white;
    font-weight: bold;
    font-size: 1.1em;
}

/* Info & Warning Boxes */
.info-box {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    color: #155724;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    border-left: 5px solid #28a745;
}

.warning-box {
    background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
    color: #856404;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    border-left: 5px solid #ffc107;
}

/* Ad Containers */
.ad-container {
    margin: 25px 0;
    text-align: center;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
    border: 2px dashed #ddd;
}

/* Affiliate Section */
.affiliate-section {
    background: linear-gradient(135deg, #f0f7ff 0%, #e3f2fd 100%);
    padding: 30px;
    border-radius: var(--radius);
    margin: 30px 0;
    border: 2px solid var(--secondary);
}

.affiliate-products {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 25px;
}

.affiliate-product {
    background: white;
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    border: 1px solid #e1e8ed;
}

.affiliate-product:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
    border-color: var(--secondary);
}

.affiliate-btn {
    display: inline-block;
    background: linear-gradient(135deg, #ff9900 0%, #ff8800 100%);
    color: white;
    padding: 12px 25px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    margin-top: 15px;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    width: 100%;
}

.affiliate-btn:hover {
    background: linear-gradient(135deg, #e68a00 0%, #d47a00 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 153, 0, 0.3);
}

/* Tools Section */
.tools-section {
    background: linear-gradient(135deg, #f8f9fa 0%, #e8eaf6 100%);
    padding: 30px;
    border-radius: var(--radius);
    margin: 30px 0;
    border: 2px solid #3f51b5;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 25px;
}

.tool-card {
    background: white;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    text-align: center;
    border: 1px solid #e1e8ed;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
    border-color: #3f51b5;
}

.tool-icon {
    font-size: 2.5em;
    margin-bottom: 15px;
    color: #3f51b5;
}

.tool-btn {
    display: inline-block;
    background: #3f51b5;
    color: white;
    padding: 10px 20px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    margin-top: 15px;
    transition: var(--transition);
}

.tool-btn:hover {
    background: #303f9f;
    transform: translateY(-2px);
}

/* FAQ Styles - FIXED */
.faq-section {
    margin-top: 20px;
}

.faq-item {
    background: white;
    border-radius: 8px;
    margin: 15px 0;
    border: 1px solid #e1e8ed;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--secondary);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.faq-question {
    padding: 20px;
    background: #f8f9fa;
    font-weight: 600;
    color: var(--dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #e1e8ed;
    user-select: none;
}

.faq-question::after {
    content: '▼';
    font-size: 0.8em;
    color: var(--secondary);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question::after {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 20px;
    display: none;
    line-height: 1.7;
    color: #555;
    background: white;
    border-top: 1px solid #f0f0f0;
}

.faq-item.active .faq-answer {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* Button Group */
.button-group {
    display: flex;
    gap: 15px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.button-group .btn {
    flex: 1;
    min-width: 200px;
}

/* Footer */
.footer {
    background: var(--dark);
    color: white;
    padding: 30px;
    text-align: center;
    margin-top: 40px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.footer-link {
    color: #bbb;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

.footer-link:hover {
    color: white;
    text-decoration: underline;
}

/* Unit Toggle */
.unit-toggle {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.unit-btn {
    flex: 1;
    padding: 12px;
    border: 2px solid #e1e8ed;
    background: white;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.unit-btn.active {
    background: var(--secondary);
    color: white;
    border-color: var(--secondary);
}

.unit-btn:hover:not(.active) {
    border-color: var(--secondary);
}

/* Floor Sections */
.floor-section {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid #e1e8ed;
}

.floor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.floor-header h4 {
    margin: 0;
    color: var(--dark);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        margin: 10px;
        border-radius: 8px;
    }
    
    .calculator-section,
    .result-section {
        padding: 20px;
    }
    
    .header {
        padding: 20px;
    }
    
    .header h1 {
        font-size: 1.8em;
        margin-top: 40px;
    }
    
    .coffee-link {
        position: static;
        margin: 15px auto;
        width: fit-content;
    }
    
    .language-selector {
        position: static;
        margin-bottom: 15px;
        text-align: center;
    }
    
    .progress-indicator {
        flex-wrap: wrap;
        gap: 15px;
    }
    
    .progress-step {
        flex: 0 0 calc(50% - 10px);
        margin-bottom: 15px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .extinguisher-grid {
        grid-template-columns: 1fr;
    }
    
    .affiliate-products,
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .recommendation-grid {
        grid-template-columns: 1fr;
    }
    
    .quotation-table {
        font-size: 0.9em;
    }
    
    .quotation-table th,
    .quotation-table td {
        padding: 10px;
    }
    
    .extinguisher-filters {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 15px;
    }
    
    .navigation-buttons {
        flex-direction: column;
        gap: 10px;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .button-group .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .progress-step {
        flex: 0 0 100%;
    }
    
    .btn {
        padding: 12px 20px;
        font-size: 14px;
    }
    
    .result-card {
        padding: 20px;
    }
    
    .extinguisher-card {
        padding: 15px;
    }
    
    .faq-question {
        padding: 15px;
        font-size: 14px;
    }
    
    .faq-answer {
        padding: 15px;
        font-size: 14px;
    }
}

/* Animations */
.fade-in {
    animation: fadeIn 0.5s ease;
}

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

/* Loading Spinner */
.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--secondary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Tooltips */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltip-text {
    visibility: hidden;
    width: 200px;
    background-color: var(--dark);
    color: white;
    text-align: center;
    border-radius: 6px;
    padding: 10px;
    position: absolute;
    z-index: 1000;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.3s;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}