/* Main Title Styles */
.main-logo-container {
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.main-title {
    font-size: 72px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--soft-black) 0%, var(--logo-color-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    line-height: 0.9;
}

.main-logo-img {
    max-width: 100px;
    width: 80%;
    height: auto;
    display: inline-block;
}

/* Search Section */
.search-section {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 40px 60px;
}

.search-container {
    width: 100%;
    max-width: 800px;
}

.search-input-wrapper {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    position: relative;
}

.search-input-wrapper:hover {
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.search-input {
    width: 100%;
    border: none;
    outline: none;
    font-size: 20px;
    font-weight: 400;
    color: var(--text-primary);
    background: transparent;
    padding: 10px 0;
    margin-bottom: 20px;
}

.search-input::placeholder {
    color: var(--text-secondary);
}

.search-buttons {
    display: flex;
    gap: 15px;
    min-width: 130px;
}

.search-btn,
.research-btn,
.submit-search-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 400;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.search-btn {
    background: var(--background-tag);
    color: var(--accent-color);
}

.search-btn:hover {
    background: #dcdcd6;
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.research-btn {
    background: var(--background-tag);
    color: var(--accent-color);
}

.research-btn:hover {
    background: #dcdcd6;
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.submit-search-btn {
    background: var(--background-tag);
    padding: 8px;
    border-radius: 50%;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: default;
    box-shadow: none;
    position: absolute;
    right: 15px;
    bottom: 15px;
    transform: scale(0.9);
    opacity: 0.7;
    transition: all 0.2s ease-in-out;
}

.submit-search-btn img {
    filter: grayscale(1) brightness(1.3) opacity(0.7);
    width: 18px;
    height: 18px;
}

.submit-search-btn.active {
    background: var(--secondary-color);
    transform: scale(1.1);
    opacity: 1;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(125, 176, 183, 0.4);
}

.submit-search-btn.active img {
    filter: invert(100%);
}

.btn-icon {
    width: 18px;
    height: 18px;
    object-fit: contain;
}

/* Category Container */
.category-container {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 800px;
    margin: 30px auto 0;
}

.category-tag {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: var(--background-tag);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}

.category-tag:hover {
    background: #dcdcd6;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border-color: var(--secondary-color);
}

.category-tag.active {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

.category-icon {
    width: 18px;
    height: 18px;
    object-fit: contain;
}

.category-text {
    font-size: 16px;
    font-weight: 400;
    color: var(--text-primary);
}

.category-tag.active .category-text {
    color: white;
}

/* Panel content styles, locked/disabled states, focus styles, */
/* and some responsive styles have been moved to base.css */

/* Responsive Design for index.html specific elements */
/* (Only keep styles truly specific to index.html's unique layout) */
@media (max-width: 1024px) {
    .main-title {
        font-size: 60px;
    }

    .main-logo-img {
        max-width: 90px;
    }
}

@media (max-width: 768px) {
    .main-title {
        font-size: 48px;
    }

    .main-logo-img {
        max-width: 80px;
    }
    
    .search-section {
        padding: 20px 20px 40px;
    }
    
    .category-container {
        gap: 10px;
    }
    
    .category-tag {
        padding: 10px 15px;
    }
    
    .category-text {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .main-title {
        font-size: 40px;
    }
    
    .main-logo-img {
        max-width: 60px;
    }
    
    .search-input {
        font-size: 16px;
    }
    
    .search-buttons {
        gap: 10px;
        width: 260px;
        margin-right: 30px;
    }
    
    .search-btn,
    .research-btn {
        justify-content: center;
    }
    
    .category-container {
        flex-direction: column;
        align-items: center;
    }
    
    .category-tag {
        width: 100%;
        max-width: 200px;
        justify-content: center;
    }
}

/* Active states for search buttons (specific to index.html buttons) */
.search-btn.active,
.research-btn.active {
    background: var(--secondary-color);
    color: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.15);
}

.app-version {
    text-align: center;
    margin-top: 30px;
    color: #d9d9d9;
    font-size: 14px;
}