html, body {
    height: 100%;
    margin: 0;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background-color: #121212;
    color: #e1e1e1;
    scroll-behavior: smooth;
}

* {
    box-sizing: border-box;
    transition: all 0.3s ease;
}

.container {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
    padding: 24px;
}

/* Messages area */
#messages {
    flex-grow: 1;
    width: 100%;
    padding: 20px;
    overflow-y: auto;
    background: rgba(44, 47, 54, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.message-row {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    max-width: 100%;
}

.profile-pic {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.message-bubble {
    background: linear-gradient(to bottom right, #3a3f4b, #2e333d);
    padding: 12px 18px;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    word-break: break-word;
    box-shadow: 0 2px 6px rgba(0,0,0,0.25);
}

.message-bubble p {
    margin: 0;
    line-height: 1.6;
    font-size: 15px;
}

/* Media content */
.media-img,
.media-video {
    width: 480px;
    height: 480px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}

/* Input section */
.input-container {
    display: flex;
    gap: 12px;
    align-items: center;
    width: 100%;
}

input[type="text"] {
    flex-grow: 1;
    padding: 12px 16px;
    border-radius: 30px;
    border: 1px solid #3a3f4b;
    background-color: #1f2128;
    color: #e1e1e1;
    font-size: 15px;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.4);
}

input[type="text"]:focus {
    outline: none;
    border-color: #4c8bf5;
    box-shadow: 0 0 0 3px rgba(76, 139, 245, 0.25);
}

/* Button styles */
button {
    padding: 10px 22px;
    border: none;
    border-radius: 30px;
    background: linear-gradient(135deg, #4c8bf5, #3b74d4);
    color: white;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

button:hover {
    background: linear-gradient(135deg, #3b74d4, #2f5eb8);
}

button:active {
    background: #2f5eb8;
    transform: scale(0.98);
}

/* Settings overlay */
#settings {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(6px);
    justify-content: center;
    align-items: center;
}

/* Settings content */
.settings-content {
    background-color: #1f2229;
    padding: 24px;
    border-radius: 16px;
    width: 320px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.settings-content h2 {
    margin-top: 0;
    color: #ffffff;
    font-size: 20px;
}

/* Modal styles */
#mediaModal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.85);
    justify-content: center;
    align-items: center;
    padding: 20px;
}

#mediaModal img,
#mediaModal video {
    max-width: 90%;
    max-height: 90%;
    border-radius: 16px;
    object-fit: contain;
}

#mediaModal .close-btn {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 32px;
    color: white;
    cursor: pointer;
    z-index: 1001;
}

/* Light Theme Modernization */
body.light-theme {
    background-color: #f1f3f5;
    color: #1a1a1a;
}

body.light-theme #messages {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    border: 1px solid #ccc;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
}

body.light-theme .message-bubble {
    background: #ffffff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.06);
}

body.light-theme input[type="text"] {
    background-color: #ffffff;
    color: #1a1a1a;
    border-color: #ccc;
}

body.light-theme input[type="text"]:focus {
    border-color: #4c8bf5;
    box-shadow: 0 0 0 3px rgba(76, 139, 245, 0.2);
}

body.light-theme button {
    background: linear-gradient(135deg, #4c8bf5, #3b74d4);
    color: white;
}

body.light-theme .settings-content {
    background-color: #ffffff;
    color: #1a1a1a;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

body.light-theme .settings-content h2 {
    color: #1a1a1a;
}

body.light-theme .media-img,
body.light-theme .media-video {
    border: 1px solid #ddd;
}