/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 大島インシュレーションカラー: 黒・赤・灰色 */
    --primary-black: #1a1a1a;
    --primary-red: #dc2626;
    --primary-red-hover: #b91c1c;
    --primary-red-dark: #991b1b;
    --accent-red: #ef4444;
    --dark-gray: #2d2d2d;
    --medium-gray: #4a4a4a;
    --light-gray: #6b7280;
    --very-light-gray: #d1d5db;
    --bg-dark: #0f0f0f;
    --bg-gray: #1f1f1f;
    --bg-light-gray: #f3f4f6;
    --bg-white: #ffffff;
    --text-white: #ffffff;
    --text-light: #e5e7eb;
    --text-gray: #9ca3af;
    --border-dark: #374151;
    --border-gray: #4b5563;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.2);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4);
    --shadow-red: 0 4px 14px 0 rgba(220, 38, 38, 0.4);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    line-height: 1.6;
    color: #1a1a1a;
    background: #ffffff;
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 60px 20px 40px;
    margin-bottom: 30px;
    background: #ffffff;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
    color: #1a1a1a;
}

.hero-title .highlight {
    color: var(--primary-red);
    font-weight: 800;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: #4a4a4a;
    max-width: 600px;
    margin: 0 auto;
}

/* Chat Section */
.chat-section {
    margin-bottom: 30px;
}

.chat-container {
    background: #ffffff;
    border-radius: var(--radius-xl);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    border: 2px solid #e5e7eb;
}

.chat-header {
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-red-dark) 100%);
    color: #ffffff;
    padding: 24px;
    text-align: center;
}

.chat-header-icon {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.chat-header h2 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.chat-header p {
    opacity: 0.9;
    font-size: 0.95rem;
}

.chat-messages {
    padding: 24px;
    max-height: 600px;
    overflow-y: auto;
    background: #f9fafb;
}

.message {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    animation: fadeIn 0.3s ease-in;
}

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

.message-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
    overflow: hidden;
}

.bot-message .message-avatar {
    background: #ffffff;
    border: 2px solid #e5e7eb;
    padding: 0;
}

.bot-message .message-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-message .message-avatar {
    background: linear-gradient(135deg, var(--primary-red), var(--primary-red-dark));
    border: 2px solid var(--accent-red);
}

.message-content {
    flex: 1;
    background: #ffffff;
    padding: 14px 18px;
    border-radius: var(--radius-lg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border: 1px solid #e5e7eb;
    color: #1a1a1a;
}

.user-message {
    flex-direction: row-reverse;
}

.user-message .message-content {
    background: linear-gradient(135deg, var(--primary-red), var(--primary-red-dark));
    color: #ffffff;
    border: 1px solid var(--accent-red);
}

.message-content p {
    margin-bottom: 8px;
    word-wrap: break-word;
    overflow-wrap: break-word;
    line-height: 1.6;
}

.message-content p:last-child {
    margin-bottom: 0;
}

/* Quick Replies */
.quick-replies {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 16px;
    padding: 0 12px;
}

.quick-reply-btn {
    background: #ffffff;
    border: 2px solid #d1d5db;
    color: #1a1a1a;
    padding: 10px 16px;
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.quick-reply-btn:hover {
    background: #f9fafb;
    border-color: var(--primary-red);
    color: var(--primary-red);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.15);
}

.quick-reply-btn:active {
    transform: translateY(0);
}

/* Contact Action Buttons */
.contact-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    margin-bottom: 20px;
    padding: 0 12px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 20px;
}

.action-btn {
    flex: 1;
    padding: 14px 20px;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
    border: none;
    text-decoration: none;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.primary-action {
    background: linear-gradient(135deg, var(--primary-red), var(--primary-red-dark));
    color: var(--text-white);
    border: 2px solid var(--accent-red);
    font-weight: 700;
    letter-spacing: 0.5px;
}

.primary-action:hover {
    background: linear-gradient(135deg, var(--accent-red), var(--primary-red));
    transform: translateY(-3px);
    box-shadow: var(--shadow-red);
}

.phone-action {
    background: #ffffff;
    color: #1a1a1a;
    border: 2px solid #d1d5db;
}

.phone-action:hover {
    background: #f9fafb;
    border-color: var(--primary-red);
    color: var(--primary-red);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.15);
}

.email-action {
    background: #ffffff;
    color: #1a1a1a;
    border: 2px solid #d1d5db;
}

.email-action:hover {
    background: #f9fafb;
    border-color: var(--primary-red);
    color: var(--primary-red);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.15);
}

/* CTA Button in Chat */
.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-red), var(--primary-red-dark));
    color: var(--text-white);
    padding: 12px 24px;
    border-radius: var(--radius-lg);
    font-weight: 700;
    text-decoration: none;
    border: 2px solid var(--accent-red);
    cursor: pointer;
    margin-top: 10px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-red);
    letter-spacing: 0.5px;
}

.cta-button:hover {
    background: linear-gradient(135deg, var(--accent-red), var(--primary-red));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(220, 38, 38, 0.5);
}

/* Chat Input */
.chat-input-container {
    padding: 20px;
    background: #ffffff;
    border-top: 2px solid #e5e7eb;
}

.input-wrapper {
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

#chatInput {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid #d1d5db;
    background: #ffffff;
    color: #1a1a1a;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-family: inherit;
    resize: none;
    max-height: 120px;
    transition: all 0.2s ease;
}

#chatInput::placeholder {
    color: #9ca3af;
}

#chatInput:focus {
    outline: none;
    border-color: var(--primary-red);
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.send-btn {
    background: linear-gradient(135deg, var(--primary-red), var(--primary-red-dark));
    color: var(--text-white);
    border: 2px solid var(--accent-red);
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
    box-shadow: var(--shadow-red);
}

.send-btn:hover {
    background: linear-gradient(135deg, var(--accent-red), var(--primary-red));
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(220, 38, 38, 0.5);
}

.send-btn:active {
    transform: scale(0.95);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.input-hint {
    font-size: 0.8rem;
    color: #9ca3af;
    margin-top: 8px;
    text-align: center;
}

/* Form Section */
.form-section {
    margin-bottom: 30px;
}

.form-container {
    background: #ffffff;
    border-radius: var(--radius-xl);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    padding: 32px;
    border: 2px solid #e5e7eb;
}

.form-header {
    text-align: center;
    margin-bottom: 30px;
}

.form-header h2 {
    font-size: 1.875rem;
    color: #1a1a1a;
    margin-bottom: 12px;
}

.form-header p {
    color: #4a4a4a;
}

.request-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #1a1a1a;
}

.required {
    color: var(--accent-red);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #d1d5db;
    background: #ffffff;
    color: #1a1a1a;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.2s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #9ca3af;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-red);
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #d1d5db;
    background: #ffffff;
    color: #1a1a1a;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.2s ease;
    cursor: pointer;
}

.form-group select:focus {
    outline: none;
    border-color: var(--primary-red);
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 8px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    color: #1a1a1a;
    font-weight: 400;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: background 0.2s ease;
}

.checkbox-label:hover {
    background: #f9fafb;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary-red);
}

.form-note {
    font-size: 0.85rem;
    color: #6b7280;
    margin-top: 6px;
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 30px;
}

/* Buttons */
.btn {
    padding: 12px 32px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-red), var(--primary-red-dark));
    color: var(--text-white);
    box-shadow: var(--shadow-red);
    border: 2px solid var(--accent-red);
    font-weight: 700;
    letter-spacing: 0.5px;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-red), var(--primary-red));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(220, 38, 38, 0.5);
}

.btn-secondary {
    background: #ffffff;
    color: #1a1a1a;
    border: 2px solid #d1d5db;
}

.btn-secondary:hover {
    background: #f9fafb;
    color: var(--primary-red);
    border-color: var(--primary-red);
}

/* Success Section */
.success-section {
    margin-bottom: 30px;
}

.success-container {
    background: #ffffff;
    border-radius: var(--radius-xl);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    padding: 48px 32px;
    text-align: center;
    border: 2px solid #e5e7eb;
}

.success-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.success-container h2 {
    font-size: 1.875rem;
    color: #1a1a1a;
    margin-bottom: 16px;
}

.success-container p {
    color: #4a4a4a;
    margin-bottom: 12px;
    font-size: 1.05rem;
}

.success-container .btn {
    margin-top: 20px;
}

/* Footer */
.footer {
    text-align: center;
    padding: 40px 20px 30px;
    background: #f9fafb;
    border-top: 2px solid #e5e7eb;
    margin-top: 60px;
}

.footer-content {
    max-width: 600px;
    margin: 0 auto;
}

.footer-logo {
    margin-bottom: 20px;
}

.footer-logo img {
    max-width: 400px;
    width: 100%;
    height: auto;
}

.footer-copyright {
    font-size: 0.9rem;
    color: #6b7280;
    margin: 15px 0 10px;
}

.footer-link {
    margin: 10px 0 0;
}

.footer-content a {
    color: var(--primary-red);
    text-decoration: none;
    transition: all 0.2s ease;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.footer-content a:hover {
    color: var(--accent-red);
    transform: translateX(3px);
}

@media (max-width: 768px) {
    .footer-logo img {
        max-width: 280px;
    }
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    z-index: 1000;
}

.loading-overlay.active {
    display: flex;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-overlay p {
    color: white;
    margin-top: 20px;
    font-size: 1.1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 1.875rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .form-container {
        padding: 24px 16px;
    }

    .chat-messages {
        max-height: 500px;
    }

    .form-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .contact-actions {
        flex-direction: column;
    }

    .action-btn {
        width: 100%;
    }

    .quick-replies {
        flex-direction: column;
    }

    .quick-reply-btn {
        width: 100%;
    }
}

/* Scrollbar Styling */
.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: #f9fafb;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: #d1d5db;
    border-radius: 4px;
    border: 2px solid #f9fafb;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--primary-red);
}