body {
    font-family: 'Poppins', sans-serif;
    color: #e0e0e0;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
    transition: all 0.5s ease-in-out;
}

.container {
    position: relative;
    z-index: 1;
    display: flex;
    width: 90%;
    max-width: 550px;
    height: auto;
    background: rgba(28, 11, 59, 0.25);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 20px;
    border: 1px solid rgba(30, 235, 216, 0.2);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    align-items: center;
    transition: max-width 0.6s ease-in-out, height 0.6s ease-in-out;
}

.left-panel {
    flex-basis: 100%;
    padding: 50px;
    text-align: center;
    transition: all 0.6s ease-in-out;
}

.right-panel {
    flex-basis: 0;
    overflow: hidden;
    opacity: 0;
    padding: 0;
    transition: all 0.6s ease-in-out;
}

.container.app-active {
    max-width: 1200px;
    height: 80vh;
}

.container.app-active .left-panel {
    flex-basis: 40%;
    text-align: left;
    padding: 40px 20px 40px 50px;
}

.container.app-active .right-panel {
    flex-basis: 60%;
    opacity: 1;
    padding: 40px 50px 40px 20px;
}

.welcome-text h1 {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: #1eebd8;
    margin-top: -15px;
    text-shadow: 0 0 10px rgba(30, 235, 216, 0.3);
    transition: font-size 0.5s ease-in-out;
}

.container.app-active .welcome-text h1 {
    font-size: 2.5rem;
}

.welcome-text p {
    font-size: 1rem;
    font-weight: 300;
    line-height: 1.7;
    color: #d1d1d1;
}

.video-container {
    width: 100%;
    height: 100%;
    aspect-ratio: 16 / 9;
    background-color: #000;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(30, 235, 216, 0.4);
    line-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

#video_feed {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    background-color: #000;
    border: none;
}

.selection-container {
    margin-top: 35px;
}

.selection-container label {
    display: block;
    font-size: 1rem;
    font-weight: 400;
    margin-bottom: 10px;
    color: #d1d1d1;
}

.selection-container select {
    width: 100%;
    padding: 12px;
    background-color: rgba(18, 2, 37, 0.5);
    color: #e0e0e0;
    border: 1px solid rgba(30, 235, 216, 0.4);
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: all 0.3s;
}

.selection-container select:focus {
    outline: none;
    border-color: #1eebd8;
    box-shadow: 0 0 15px rgba(30, 235, 216, 0.3);
}

.selection-container select:disabled {
    background-color: rgba(40, 40, 40, 0.5);
    color: #888;
    cursor: not-allowed;
}

.button-container {
    margin-top: 25px;
    display: flex;
    gap: 15px;
    justify-content: center;
    transition: justify-content 0.6s ease-in-out;
}

.container.app-active .button-container {
    justify-content: flex-start;
}

.control-btn {
    flex-grow: 1;
    max-width: 200px;
    padding: 12px 20px;
    font-size: 1rem;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    border: 2px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

#start-btn {
    background-color: #1eebd8;
    color: #120225;
}

#start-btn:hover {
    background-color: #82fcf0;
    box-shadow: 0 0 20px rgba(30, 235, 216, 0.5);
    transform: translateY(-2px);
}

#stop-btn {
    background-color: transparent;
    color: #FF7EB9;
    border-color: #FF7EB9;
}

#stop-btn:hover {
    background-color: #FF7EB9;
    color: #120225;
    box-shadow: 0 0 20px rgba(255, 126, 185, 0.5);
    transform: translateY(-2px);
}

.control-btn:active {
    transform: scale(0.98) translateY(0);
}

.control-btn:disabled {
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

#start-btn:disabled {
    background-color: #1eebd8;
    opacity: 0.4;
}

#stop-btn:disabled {
    color: #FF7EB9;
    border-color: #FF7EB9;
    opacity: 0.4;
    background-color: transparent;
}

.welcome-text h1 {
    display: inline-block; 
    vertical-align: middle; 
}

.page-watermark {
            position: fixed; 
            bottom: 15px;    
            right: 20px;     
            font-size: 12px; 
            color: rgba(255, 255, 255, 0.4); 
            font-family: 'Poppins', sans-serif;
            font-weight: 300;
            z-index: 100;
            letter-spacing: 0.5px;
        }