:root {
    --primary-color: #0D6EFD;
    --secondary-color: #6C757D;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

[data-theme="dark"] {
    --background-color: #121212;
    --surface-color: #1E1E1E;
    --text-color: #FFFFFF;
    --text-color-muted: rgba(255, 255, 255, 0.6);
    --border-color: #333;
    --input-bg: #3A3B3C;
    --header-bg: linear-gradient(to right, #1e1e1e, #2a2a2a);
    --divider-bg: #333;
    --divider-text: #aaa;
    --received-bubble-bg: #3A3B3C;
}

[data-theme="light"] {
    --background-color: #F0F2F5;
    --surface-color: #FFFFFF;
    --text-color: #050505;
    --text-color-muted: rgba(0, 0, 0, 0.6);
    --border-color: #E0E0E0;
    --input-bg: #F0F2F5;
    --header-bg: #FFFFFF;
    --divider-bg: #E9EBEE;
    --divider-text: #65676B;
    --received-bubble-bg: #E4E6EB;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: var(--font-family);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.mobile-chat-container {
    width: 100%;
    max-width: 450px;
    height: 90vh;
    max-height: 800px;
    background-color: var(--surface-color);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.chat-header {
    background: var(--header-bg);
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
    border-bottom: 1px solid var(--border-color);
}

.chat-header .avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--primary-color);
}

.chat-header .actions a,
.chat-header .d-flex a {
    color: var(--text-color) !important;
}

.chat-header .small {
    color: var(--text-color-muted) !important;
}

.chat-body {
    flex-grow: 1;
    padding: 1rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.message-day-divider {
    text-align: center;
    margin: 1rem 0;
}

.message-day-divider span {
    background-color: var(--divider-bg);
    color: var(--divider-text);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
}

.message {
    display: flex;
    margin-bottom: 1rem;
    max-width: 80%;
}

.message.sent {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message.received {
    align-self: flex-start;
}

.message-bubble {
    padding: 0.75rem 1rem;
    border-radius: 20px;
    position: relative;
}

.message.sent .message-bubble {
    background-color: var(--primary-color);
    color: white;
    border-top-right-radius: 5px;
}

.message.received .message-bubble {
    background-color: var(--received-bubble-bg);
    color: var(--text-color);
    border-top-left-radius: 5px;
}

.message-time {
    font-size: 0.7rem;
    color: var(--text-color-muted);
    display: block;
    text-align: right;
    margin-top: 5px;
}

.message.sent .message-time {
    color: rgba(255, 255, 255, 0.8);
}

[data-theme="light"] .message.sent .message-time {
    color: rgba(255, 255, 255, 0.8);
}

.chat-footer {
    padding: 1rem;
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
}

.chat-footer .input-group {
    flex-grow: 1;
}

.chat-footer .form-control {
    background-color: var(--input-bg);
    border-color: var(--input-bg);
    color: var(--text-color);
    border-radius: 20px;
}

.chat-footer .form-control::placeholder {
    color: var(--text-color-muted);
}

.chat-footer .form-control:focus {
    background-color: var(--input-bg);
    border-color: var(--primary-color);
    box-shadow: none;
    color: var(--text-color);
}

.chat-footer .btn-secondary {
    background: transparent;
    border: none;
    color: var(--text-color-muted);
    font-size: 1.2rem;
}

.chat-footer .mic-button, .chat-footer .send-button {
    margin-left: 0.5rem;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    font-size: 1.2rem;
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.voice-message {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.voice-message .bi-play-circle-fill {
    font-size: 1.5rem;
}

.voice-progress {
    flex-grow: 1;
    height: 4px;
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
}

.mic-button.recording {
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(255, 0, 0, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(255, 0, 0, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(255, 0, 0, 0);
    }
}

.voice-message .play-button {
    padding: 0;
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
}

[data-theme="dark"] .voice-message .play-button,
[data-theme="dark"] .voice-message .share-button {
    color: white;
}

.voice-message-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-grow: 1;
}

.voice-progress-container {
    flex-grow: 1;
    height: 4px;
    background-color: var(--text-color-muted);
    border-radius: 2px;
    cursor: pointer;
    margin: 0 0.5rem;
}

.share-button {
    padding: 0;
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 1.2rem;
    opacity: 0.7;
}

.voice-progress {
    height: 100%;
    width: 0;
    background-color: var(--text-color);
    border-radius: 2px;
}

[data-theme="dark"] .voice-progress {
    background-color: white;
}

/* Custom scrollbar for webkit browsers */
.chat-body::-webkit-scrollbar {
  width: 6px;
}

.chat-body::-webkit-scrollbar-track {
  background: var(--surface-color);
}

.chat-body::-webkit-scrollbar-thumb {
  background-color: #555;
  border-radius: 6px;
}

/* Theme Panel */
.theme-panel {
    position: absolute;
    top: 70px;
    right: 20px;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 100;
    display: none;
}

.theme-panel.show {
    display: block;
}

.theme-panel h5 {
    margin-top: 0;
    margin-bottom: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
}

#emoji-btn {
    background: none;
    border: none;
    color: var(--text-color-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0 0.5rem;
}

#emoji-panel {
    height: 280px;
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: 10px;
    overflow-y: auto;
    display: none; /* Hidden by default */
}

#emoji-panel.show {
    display: block;
}

.emoji-categories {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 10px;
}

.category-btn {
    background: none;
    border: none;
    color: var(--text-color-muted);
    padding: 10px 15px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
}

.category-btn.active {
    border-bottom: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.emoji-grid, .sticker-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
    gap: 10px;
}

.sticker-grid {
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
}

.emoji-grid span, .sticker-grid img {
    cursor: pointer;
    font-size: 28px;
    text-align: center;
}

.sticker-grid img {
    width: 100%;
    height: auto;
}



.message-content.image-message {
    padding: 0;
    background-color: transparent;
    border-radius: 15px;
    overflow: hidden;
}

.message-content.image-message img {
    max-width: 250px;
    display: block;
    height: auto;
}