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

:root {
    --mint-bg: #e8f5f0;
    --mint-light: #f0faf5;
    --mint-medium: #d4f1e8;
    --mint-dark: #7dd3b0;
    --mint-darker: #5cb892;
    --text-color: #2c3e50;
    --card-bg: #ffffff;
    --pink: #e91e63;
    --pink-hover: #c2185b;
}

body.dark-mode {
    --mint-bg: #1a1a1a;
    --mint-light: #2d2d2d;
    --mint-medium: #242424;
    --mint-dark: #3a3a3a;
    --mint-darker: #2a2a2a;
    --text-color: #e0e0e0;
    --card-bg: #2d2d2d;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--mint-bg);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: linear-gradient(135deg, var(--mint-dark), #a8e6cf);
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

body.dark-mode header {
    background: linear-gradient(135deg, #2a2a2a, #3a3a3a);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    color: white;
    font-weight: bold;
}

.header-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.login-btn {
    background-color: var(--pink);
    color: white;
    border: none;
    padding: 0.7rem 1.5rem;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(233, 30, 99, 0.3);
}

.login-btn:hover {
    background-color: var(--pink-hover);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(233, 30, 99, 0.4);
}

.main-nav {
    background-color: var(--mint-medium);
    padding: 0.8rem 0;
}

body.dark-mode .main-nav {
    background-color: var(--mint-medium);
}

.nav-list {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.nav-list a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-list a:hover {
    color: var(--mint-darker);
}

.hero {
    background: linear-gradient(135deg, var(--mint-dark), #a8e6cf);
    padding: 4rem 0;
    text-align: center;
    color: white;
}

body.dark-mode .hero {
    background: linear-gradient(135deg, #2a2a2a, #3a3a3a);
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 1.3rem;
    opacity: 0.95;
}

.apartments-section {
    padding: 4rem 0;
    background-color: var(--mint-light);
}

body.dark-mode .apartments-section {
    background-color: var(--mint-light);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-color);
}

.apartments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.apartment-card {
    background-color: var(--card-bg);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.apartment-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

body.dark-mode .apartment-card {
    background: linear-gradient(135deg, #2d2d2d, #3a3a3a);
    border: 1px solid #444;
}

.card-header {
    background: linear-gradient(135deg, var(--mint-dark), var(--mint-darker));
    padding: 1.5rem;
    color: white;
}

body.dark-mode .card-header {
    background: linear-gradient(135deg, #3a3a3a, #4a4a4a);
}

.apartment-name {
    font-size: 1.3rem;
    font-weight: bold;
}

.card-body {
    padding: 1.5rem;
}

.card-info {
    margin: 0.8rem 0;
    font-size: 1rem;
}

.detail-btn {
    width: 100%;
    background-color: var(--mint-dark);
    color: white;
    border: none;
    padding: 0.8rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    margin-top: 1rem;
    transition: all 0.3s ease;
}

.detail-btn:hover {
    background-color: var(--mint-darker);
    transform: scale(1.02);
}

.contact-section {
    padding: 4rem 0;
    background-color: var(--mint-medium);
}

body.dark-mode .contact-section {
    background-color: var(--mint-medium);
}

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

.contact-form {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

.required {
    color: var(--pink);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid var(--mint-medium);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    background-color: var(--mint-light);
    color: var(--text-color);
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--mint-dark);
}

.submit-btn {
    width: 100%;
    background-color: var(--pink);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(233, 30, 99, 0.3);
}

.submit-btn:hover {
    background-color: var(--pink-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(233, 30, 99, 0.4);
}

.form-notice {
    margin-top: 2rem;
    padding: 1rem;
    background-color: var(--mint-light);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-color);
}

.form-notice p {
    margin: 0.5rem 0;
}

.footer {
    background: linear-gradient(135deg, var(--mint-darker), var(--mint-dark));
    color: white;
    padding: 3rem 0 1rem;
}

body.dark-mode .footer {
    background: linear-gradient(135deg, #2a2a2a, #1a1a1a);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-section p {
    margin: 0.5rem 0;
    opacity: 0.9;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.2);
    opacity: 0.8;
}

.chatbot {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

.chatbot-toggle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--pink), var(--pink-hover));
    border: none;
    color: white;
    font-size: 1.8rem;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(233, 30, 99, 0.4);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chatbot-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 25px rgba(233, 30, 99, 0.5);
}

.chatbot-toggle.active {
    display: none;
}

.chatbot-window {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 380px;
    height: 550px;
    background-color: var(--card-bg);
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    flex-direction: column;
    overflow: hidden;
    animation: slideUp 0.3s ease;
}

.chatbot-window.active {
    display: flex;
}

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

.api-key-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    padding: 2rem 1.5rem;
    text-align: center;
    background-color: var(--mint-light);
}

.api-key-screen .api-key-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.api-key-screen h4 {
    font-size: 1.3rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.api-key-screen > p {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.7;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.api-key-input {
    width: 100%;
    padding: 0.9rem 1rem;
    border: 2px solid var(--mint-dark);
    border-radius: 12px;
    font-size: 0.95rem;
    font-family: monospace;
    background-color: var(--card-bg);
    color: var(--text-color);
    text-align: center;
    transition: border-color 0.3s ease;
}

.api-key-input:focus {
    outline: none;
    border-color: var(--pink);
}

.api-key-save-btn {
    width: 100%;
    padding: 0.9rem;
    margin-top: 1rem;
    background: linear-gradient(135deg, var(--pink), var(--pink-hover));
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(233, 30, 99, 0.3);
}

.api-key-save-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(233, 30, 99, 0.4);
}

.api-key-help {
    margin-top: 1.5rem;
    font-size: 0.8rem;
    color: var(--text-color);
    opacity: 0.6;
    line-height: 1.6;
}

.api-key-help a {
    color: var(--pink);
    text-decoration: none;
    font-weight: bold;
}

.api-key-help a:hover {
    text-decoration: underline;
}

.api-key-notice {
    margin-top: 0.8rem;
    font-size: 0.75rem;
    color: var(--text-color);
    opacity: 0.45;
}

.chat-screen {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
}

.chatbot-header {
    background: linear-gradient(135deg, var(--pink), var(--pink-hover));
    color: white;
    padding: 1.2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

body.dark-mode .chatbot-header {
    background: linear-gradient(135deg, #c2185b, #ad1457);
}

.chatbot-header h3 {
    font-size: 1.2rem;
    margin: 0;
}

.chatbot-header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.chatbot-settings {
    background: transparent;
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.3s ease;
}

.chatbot-settings:hover {
    background: rgba(255, 255, 255, 0.2);
}

.api-key-panel {
    display: none;
    background-color: var(--card-bg);
    border-bottom: 2px solid var(--mint-medium);
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.3s ease;
}

.api-key-panel.active {
    display: block;
    max-height: 400px;
}

.api-key-panel-inner {
    padding: 1rem;
}

.api-key-panel h4 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.api-key-desc {
    font-size: 0.8rem;
    color: var(--text-color);
    opacity: 0.7;
    margin-bottom: 0.8rem;
    line-height: 1.4;
}

.api-key-input-group {
    display: flex;
    gap: 0.3rem;
    margin-bottom: 0.6rem;
}

.api-key-input {
    flex: 1;
    padding: 0.6rem;
    border: 2px solid var(--mint-medium);
    border-radius: 8px;
    font-size: 0.85rem;
    font-family: monospace;
    background-color: var(--mint-light);
    color: var(--text-color);
}

.api-key-input:focus {
    outline: none;
    border-color: var(--pink);
}

.api-key-toggle-vis {
    background: transparent;
    border: 2px solid var(--mint-medium);
    border-radius: 8px;
    padding: 0.4rem 0.6rem;
    cursor: pointer;
    font-size: 1rem;
}

.api-key-buttons {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.api-key-save {
    flex: 1;
    padding: 0.5rem;
    background-color: var(--pink);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.api-key-save:hover {
    background-color: var(--pink-hover);
}

.api-key-delete {
    padding: 0.5rem 1rem;
    background-color: #666;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.api-key-delete:hover {
    background-color: #444;
}

.api-key-status {
    font-size: 0.8rem;
    margin-bottom: 0.3rem;
    padding: 0.3rem 0;
}

.status-active {
    color: #4caf50;
}

.status-inactive {
    color: #ff9800;
}

.status-error {
    color: #f44336;
}

.api-key-help {
    font-size: 0.75rem;
    color: var(--text-color);
    opacity: 0.6;
}

.api-key-help a {
    color: var(--pink);
    text-decoration: none;
}

.api-key-help a:hover {
    text-decoration: underline;
}

.chatbot-close {
    background: transparent;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.3s ease;
}

.chatbot-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.chatbot-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    background-color: var(--mint-light);
}

body.dark-mode .chatbot-messages {
    background-color: var(--mint-medium);
}

.bot-message,
.user-message {
    margin-bottom: 1rem;
    padding: 0.8rem 1rem;
    border-radius: 15px;
    max-width: 85%;
    animation: fadeIn 0.3s ease;
}

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

.bot-message {
    background-color: white;
    align-self: flex-start;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

body.dark-mode .bot-message {
    background-color: var(--card-bg);
    color: var(--text-color);
}

.bot-message p {
    margin: 0.5rem 0;
    font-size: 0.95rem;
    line-height: 1.5;
}

.loading-dots {
    display: flex;
    align-items: center;
    gap: 2px;
}

.loading-dots span {
    animation: loadingDot 1.4s infinite;
    opacity: 0;
}

.loading-dots span:nth-child(1) {
    animation-delay: 0s;
}

.loading-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.loading-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes loadingDot {
    0%, 100% {
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
}

.user-message {
    background: linear-gradient(135deg, var(--mint-dark), var(--mint-darker));
    color: white;
    align-self: flex-end;
    margin-left: auto;
}

.quick-replies {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.quick-reply {
    background-color: white;
    border: 2px solid var(--mint-dark);
    color: var(--mint-darker);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.quick-reply:hover {
    background-color: var(--mint-dark);
    color: white;
    transform: translateY(-2px);
}

body.dark-mode .quick-reply {
    background-color: var(--card-bg);
    border-color: var(--mint-darker);
    color: var(--text-color);
}

body.dark-mode .quick-reply:hover {
    background-color: var(--mint-darker);
    color: white;
}

.chatbot-input-area {
    display: flex;
    padding: 1rem;
    background-color: var(--card-bg);
    border-top: 1px solid var(--mint-medium);
}

.chatbot-input {
    flex: 1;
    padding: 0.8rem;
    border: 2px solid var(--mint-medium);
    border-radius: 25px;
    font-size: 0.95rem;
    font-family: inherit;
    background-color: var(--mint-light);
    color: var(--text-color);
    transition: border-color 0.3s ease;
}

.chatbot-input:focus {
    outline: none;
    border-color: var(--mint-dark);
}

.chatbot-send {
    margin-left: 0.5rem;
    background-color: var(--pink);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
}

.chatbot-send:hover {
    background-color: var(--pink-hover);
    transform: scale(1.05);
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

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

    .section-title {
        font-size: 2rem;
    }

    .apartments-grid {
        grid-template-columns: 1fr;
    }

    .nav-list {
        flex-direction: column;
        gap: 1rem;
    }

    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    .chatbot-window {
        width: calc(100vw - 40px);
        height: calc(100vh - 100px);
        bottom: 10px;
        right: 10px;
    }

    .chatbot-toggle {
        width: 55px;
        height: 55px;
        font-size: 1.5rem;
    }
}