html {
  box-sizing: border-box;
}
*, *:before, *:after {
  box-sizing: inherit;
}

/* --- General & Variables --- */
:root {
    --primary-bg: #ffffff;
    --secondary-bg: #f7f7f8;
    --primary-text: #1d1d1f;
    --secondary-text: #6e6e80;
    --accent-color: #1d1d1f;
    --accent-hover: #333333;
    --accent-text: #ffffff;
    --border-color: #e5e5e5;
    --error-color: #d9534f;
    --success-color: #10a37f;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    --font-sans: "Segoe UI", "SF Pro Display", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

body.dark-mode {
    --primary-bg: #1d1d1f;
    --secondary-bg: #000000;
    --primary-text: #f5f5f7;
    --secondary-text: #a1a1a6;
    --accent-color: #f5f5f7;
    --accent-hover: #cccccc;
    --accent-text: #1d1d1f;
    --border-color: #3a3a3c;
}

body {
    font-family: var(--font-sans);
    background-color: var(--secondary-bg);
    color: var(--primary-text);
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

/* Prevent body scroll when menu is open */
body.menu-open {
    overflow: hidden;
}

/* --- Incognito Mode Visual Style --- */
body.incognito-active #app-container {
    filter: grayscale(1);
    transition: filter 0.5s ease;
}

/* --- Utility Classes --- */
.hidden {
    display: none !important;
}

.visible {
    display: flex !important;
}

/* --- Login Container --- */
#login-container {
    width: 100vw;
    height: 100vh;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    background-color: var(--secondary-bg);
}

.login-box {
    background-color: var(--primary-bg);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    width: 100%;
    max-width: 400px;
    margin: 1rem;
}

.login-logo {
    margin-bottom: 1rem;
    width: 50px;
    height: 50px;
    color: var(--accent-color);
}

.login-box h1 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-size: 1.75rem;
}

.login-box p {
    margin-bottom: 1.5rem;
    color: var(--secondary-text);
}

/* --- Login Forms & Inputs --- */
#register-view, #login-view {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.login-box input[type="text"] {
    width: calc(100% - 2rem);
    padding: 0.9rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.login-box input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.15);
}

.login-box button {
    padding: 0.9rem 1rem;
    border: none;
    border-radius: 8px;
    background-color: var(--accent-color);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

.login-box button:hover {
    background-color: var(--accent-hover);
}

.feedback-message {
    margin-top: 1rem;
    min-height: 20px;
    font-weight: 500;
}

#login-feedback {
    color: var(--secondary-text);
}

#toggle-login-view {
    display: inline-block;
    margin-top: 1rem;
    color: var(--accent-color);
    text-decoration: none;
    font-size: 0.9rem;
}

#toggle-login-view:hover {
    text-decoration: underline;
}

.code-display {
    background-color: var(--secondary-bg);
    border: 1px dashed var(--border-color);
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--accent-color);
    word-break: break-all;
}

/* --- App Container --- */
#app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* --- Side Menu (Hamburger Menu) --- */
.side-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100%;
    background-color: var(--primary-bg);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    z-index: 1001;
    transform: translateX(-100%);
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    overflow-y: auto; /* Allow the entire menu to scroll */
}

.side-menu.open {
    transform: translateX(0);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

/* Staggered animation for menu items */
.side-menu.open .side-menu-header > *,
.side-menu.open .side-menu-nav a,
.side-menu.open .chat-history-item,
.side-menu.open .side-menu-footer .menu-section > * {
    opacity: 1;
    transform: translateX(0);
    transition: opacity 0.3s ease-out, transform 0.3s ease-out;
}

.side-menu-header > *,
.side-menu-nav a,
.chat-history-item,
.side-menu-footer .menu-section > * {
    opacity: 0;
    transform: translateX(-20px);
}

/* --- Menu Structure --- */
.side-menu-nav {
    /* flex-grow: 1; */ /* Removed to allow footer to be pushed down */
    /* overflow-y: auto; */ /* Removed to prevent nested scrollbars */
    margin: 1rem 0;
    min-height: 150px; /* Ensure history list has a minimum height */
}

.side-menu-footer {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.menu-section {
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
    margin-top: 0.5rem;
}

/* --- Menu Header --- */
.side-menu-header {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    flex-shrink: 0;
}

#new-chat-btn {
    width: 100%;
    padding: 0.65rem 1rem;
    background-color: var(--accent-color);
    color: var(--accent-text);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    text-align: left;
    font-size: 1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: background-color 0.2s;
}

#new-chat-btn:hover {
    opacity: 0.9;
}

.search-wrapper {
    position: relative;
}

.search-wrapper i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--secondary-text);
    width: 16px;
    height: 16px;
}

#search-history-input {
    width: 100%;
    padding: 0.6rem 1rem 0.6rem 2.5rem; /* Left padding for icon */
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    color: var(--primary-text);
    border-radius: 8px;
    font-size: 0.9rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

#search-history-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

/* --- Menu Links --- */
.side-menu a {
    color: var(--secondary-text);
    text-decoration: none;
    font-size: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    transition: background-color 0.2s, color 0.2s;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 500;
}

.side-menu a:hover {
    background-color: var(--secondary-bg);
    color: var(--primary-text);
}

.side-menu a.active {
    background-color: var(--secondary-bg);
    color: var(--primary-text);
}

.side-menu a i {
    width: 20px;
    height: 20px;
    stroke-width: 2;
}

/* --- Chat History in Side Menu --- */
.chat-history-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.chat-history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem; /* Reduced padding */
    border-radius: 8px;
    transition: background-color 0.2s;
    position: relative;
    color: var(--secondary-text);
}

.chat-history-item:hover {
    background-color: var(--secondary-bg);
    color: var(--primary-text);
}

.chat-history-item.active {
    background-color: var(--secondary-bg);
    color: var(--primary-text);
    font-weight: 600;
}

.history-title {
    flex-grow: 1;
    padding: 0.5rem;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 0.9rem; /* Slightly smaller */
}

.history-options-btn {
    background: none;
    border: none;
    color: var(--secondary-text);
    cursor: pointer;
    padding: 0.25rem; /* Smaller click target */
    border-radius: 6px;
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    line-height: 1;
    opacity: 0; /* Hidden by default */
    transition: opacity 0.2s;
}

.chat-history-item:hover .history-options-btn {
    opacity: 1; /* Show on hover */
}

.history-options-btn:hover {
    background-color: var(--border-color);
    color: var(--primary-text);
}

.history-options-menu {
    position: fixed;
    background-color: var(--primary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 1002;
    display: flex;
    flex-direction: column;
    padding: 0.5rem;
    min-width: 180px;
}

.history-options-menu.hidden {
    display: none;
}

.history-options-menu button {
    background: none;
    border: none;
    padding: 0.75rem 1rem;
    text-align: left;
    cursor: pointer;
    color: var(--primary-text);
    border-radius: 6px;
}

.history-options-menu button:hover {
    background-color: var(--secondary-bg);
}

/* --- Menu Features (Toggles, Selects) --- */
.menu-feature {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1rem;
}

.feature-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--secondary-text);
    font-size: 1rem;
    font-weight: 500;
}

.feature-label i {
    width: 20px;
    height: 20px;
}

#language-select, #voice-select {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.25rem 0.5rem;
    color: var(--primary-text);
    font-size: 0.9rem;
    max-width: 120px;
}

/* --- Menu User Profile --- */
.user-profile {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background-color: var(--secondary-bg);
    border-radius: 8px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    overflow: hidden;
}

#menu-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--accent-color);
    color: var(--accent-text);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

#menu-user-name {
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

#menu-logout-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--secondary-text);
    padding: 0.5rem;
    border-radius: 8px;
    transition: background-color 0.2s, color 0.2s;
}

#menu-logout-btn:hover {
    background-color: var(--border-color);
    color: var(--error-color);
}

/* --- Toggle Switch CSS --- */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
}

input:checked + .slider {
    background-color: var(--accent-color);
}

input:focus + .slider {
    box-shadow: 0 0 1px var(--accent-color);
}

input:checked + .slider:before {
    transform: translateX(22px);
}

/* Rounded sliders */
.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

/* --- Overlay --- */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease-in-out, visibility 0.3s ease-in-out;
}

.overlay.visible {
    opacity: 1;
    visibility: visible;
}

/* --- Main Content Layout --- */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow-x: hidden; /* Prevent horizontal scroll */
}

/* --- Header --- */
header {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background-color: var(--primary-bg);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    z-index: 100;
}

header h1 {
    margin: 0;
    font-size: 1.5rem;
    text-align: center;
    flex-grow: 1;
}

.hamburger-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1002;
}

.hamburger-btn span {
    display: block;
    width: 24px;
    height: 3px;
    background-color: var(--primary-text);
    margin: 5px 0;
    transition: all 0.3s ease-in-out;
}

/* Hamburger to 'X' animation */
.hamburger-btn.open span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
.hamburger-btn.open span:nth-child(2) {
    opacity: 0;
}
.hamburger-btn.open span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* --- Chat Container & Welcome Screen --- */
#chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    background-color: var(--secondary-bg);
    display: flex;
    flex-direction: column;
}

#welcome-screen {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--secondary-text);
}

#welcome-screen.hidden {
    display: none;
}

.welcome-logo {
    width: 60px;
    height: 60px;
    background-color: var(--primary-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    margin-bottom: 1rem;
}
.welcome-logo img {
    width: 32px;
    height: 32px;
    stroke: var(--accent-color);
}

#welcome-screen h1 {
    font-size: 2rem;
    color: var(--primary-text);
    margin-bottom: 2rem;
}

.prompt-suggestions {
    display: flex;
    flex-wrap: wrap; /* Allow cards to wrap to the next line */
    justify-content: center; /* Center the cards */
    gap: 1rem;
    max-width: 800px;
    padding: 0 1rem; /* Add some padding on smaller screens */
}

.suggestion-card {
    background-color: var(--primary-bg);
    border: 1px solid var(--border-color);
    padding: 1.2rem;
    border-radius: 12px;
    flex: 1;
    min-width: 200px; /* Ensure cards don't get too squished */
    cursor: pointer;
    transition: transform 0.2s ease-out, box-shadow 0.2s ease-out;
    box-shadow: 0 2px 4px rgba(0,0,0,0.04);
}

.suggestion-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 8px 15px rgba(0,0,0,0.08);
}

.suggestion-card h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1rem;
    color: var(--primary-text);
}

.suggestion-card p {
    margin: 0;
    font-size: 0.9rem;
}

#chat-box {
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Chat Message Styling */
.chat-message {
    padding: 0.8rem 1.2rem;
    border-radius: 18px;
    max-width: 80%;
    line-height: 1.6;
    word-wrap: break-word;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

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

.chat-message-row {
    display: flex;
    gap: 1rem;
    align-items: flex-start; /* Align avatar and bubble to the top */
    animation: fadeIn 0.3s ease-out;
}

.user-row {
    flex-direction: row-reverse; /* Puts avatar on the right */
}

.avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--accent-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0; /* Prevent avatar from shrinking */
    margin-top: 4px;
}

.bot-row .avatar {
    background-color: #19c37d; /* A color similar to ChatGPT's logo */
}

.user-row .avatar {
    background-color: #6e40c9; /* A different color for the user */
}

.bot-message {
}

.user-message {
    align-self: flex-end;
}

.user-message {
    background-color: var(--accent-color);
    color: var(--accent-text);
    border-bottom-right-radius: 5px; /* Softer edge */
}

.bot-message {
    background-color: var(--primary-bg);
    color: var(--primary-text);
    border: 1px solid var(--border-color); /* Kept for light mode contrast */
    border-bottom-left-radius: 5px; /* Softer edge */
    position: relative; /* For positioning actions */
}

body.dark-mode .bot-message {
    border: none; /* Remove border in dark mode for a cleaner look */
}

/* --- Message Actions (Copy/Download Buttons) --- */
.message-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
    opacity: 0; /* Hidden by default */
    transition: opacity 0.2s ease-in-out;
    height: 0;
    overflow: hidden;
}

.chat-message:hover .message-actions {
    opacity: 1; /* Show on hover */
    height: auto;
}

.message-action-btn {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    color: var(--secondary-text);
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.message-action-btn:hover {
    background-color: var(--accent-color);
    color: var(--accent-text);
    border-color: var(--accent-color);
}

.message-action-btn.icon-btn {
    padding: 0.5rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.message-action-btn.icon-btn.active {
    background-color: var(--accent-color);
    color: var(--accent-text);
}

.image-loader {
    padding: 2rem 1rem;
    font-style: italic;
    color: var(--secondary-text);
    text-align: center;
}

.chat-message img,
.chat-message video {
    max-width: 100%;
    border-radius: 10px;
    margin-top: 10px;
}

/* Style for the text prompt accompanying an uploaded image */
.message-content img + p {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
    font-style: italic;
    color: var(--secondary-text);
}

.typing-indicator span {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--secondary-text);
    animation: typing 1s infinite;
}
.typing-indicator span:nth-child(2) { animation-delay: 0.1s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.2s; }

@keyframes typing {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

/* --- Input Area --- */
#input-area {
    padding: 1.5rem;
    background-color: var(--primary-bg);
    border-top: 1px solid var(--border-color);
    width: 100%;
    box-sizing: border-box;
}

.quick-prompts {
    margin: 0 auto 1rem auto;
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.prompt-chip {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--primary-text);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.2s, border-color 0.2s;
}

.prompt-chip:hover {
    background-color: var(--secondary-bg);
    border-color: var(--accent-color);
}

.input-wrapper {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin: 0 auto;
    background-color: var(--primary-bg);
    padding: 0.5rem 0.75rem;
    border-radius: 24px; /* More rounded */
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    transition: box-shadow 0.2s, border-color 0.2s;
}

.input-wrapper:focus-within {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    border-color: var(--accent-color);
}

#user-input {
    flex: 1;
    border: none;
    background: none;
    font-size: 1rem;
    padding: 0.75rem 0.5rem; /* More vertical padding */
    color: var(--primary-text);
}

#user-input:focus {
    outline: none;
}

#input-area button {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 8px;
    background-color: transparent;
    color: var(--secondary-text);
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

#input-area button svg {
    stroke: currentColor;
}

#input-area button:hover {
    background-color: var(--secondary-bg);
    color: var(--primary-text);
}

#input-area button#chat-btn {
    background-color: var(--accent-color);
    color: white;
}

#input-area button#chat-btn:hover {
    background-color: var(--accent-hover);
}

body.dark-mode #input-area button#chat-btn svg {
    stroke: var(--accent-text);
}

.generation-buttons {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    margin: 1rem auto 0 auto;
}

.gen-btn {
    flex-grow: 1;
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    color: var(--secondary-text);
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.gen-btn:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

/* --- Responsive Design --- */
/* --- Modal (Profile & Settings) --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1002;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay:not(.hidden) {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--primary-bg);
    color: var(--primary-text);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 500px;
    position: relative;
    transform: scale(0.95);
    transition: transform 0.3s ease;
}

.modal-overlay:not(.hidden) .modal-content {
    transform: scale(1);
}

.modal-close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--secondary-text);
    cursor: pointer;
}

.modal-content h2 {
    margin-top: 0;
    margin-bottom: 1.5rem;
}

.info-section {
    margin-bottom: 1.5rem;
}

.info-section h3 {
    margin-bottom: 0.5rem;
    color: var(--secondary-text);
}

.profile-info p {
    margin: 0.5rem 0;
}

.settings-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.settings-actions button {
    width: 100%;
    padding: 0.8rem;
    font-size: 1rem;
    border-radius: 8px;
    cursor: pointer;
    border: 1px solid var(--border-color);
    background-color: var(--secondary-bg);
    color: var(--primary-text);
    transition: background-color 0.2s;
}

.settings-actions button:hover {
    background-color: var(--border-color);
}

.btn-danger {
    background-color: var(--error-color) !important;
    border-color: var(--error-color) !important;
    color: white !important;
}

.btn-danger:hover {
    opacity: 0.8;
}

#logout-btn {
    width: 100%;
    padding: 0.8rem;
    margin-top: 1.5rem;
    font-size: 1rem;
    border-radius: 8px;
    cursor: pointer;
    border: none;
}

/* --- Personality Modal Specifics --- */
#personality-input {
    width: 100%;
    min-height: 100px;
    padding: 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--secondary-bg);
    color: var(--primary-text);
    font-family: var(--font-sans);
    font-size: 1rem;
    resize: vertical;
    margin: 1rem 0;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1.5rem;
}

.modal-actions button {
    padding: 0.7rem 1.2rem;
    border-radius: 8px;
    border: 1px solid transparent;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: background-color 0.2s, border-color 0.2s;
}

#cancel-personality-btn {
    background-color: transparent;
    border-color: var(--border-color);
    color: var(--primary-text);
}

#cancel-personality-btn:hover {
    background-color: var(--secondary-bg);
}

#save-personality-btn {
    background-color: var(--accent-color);
    color: var(--accent-text);
    border-color: var(--accent-color);
}

#save-personality-btn:hover {
    opacity: 0.9;
}


/* --- Home Container --- */
#home-container {
    width: 100vw;
    height: 100vh;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    background: linear-gradient(135deg, var(--secondary-bg) 0%, var(--primary-bg) 100%);
    transition: background 0.3s;
}

#home-container .login-box {
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);
}

body.dark-mode #home-container .login-box {
    background-color: rgba(29, 29, 31, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

#home-container .login-logo {
    transform: scale(1.2);
    margin-bottom: 1.5rem;
}

#home-container h1 {
    font-size: 2rem;
    font-weight: 700;
}

#home-container p {
    font-size: 1.1rem;
    max-width: 90%;
    margin-left: auto;
    margin-right: auto;
}

#home-container button {
     width: auto;
     padding: 0.9rem 2.5rem;
     border: none;
     border-radius: 50px;
     background-color: var(--accent-color);
     color: var(--accent-text);
     font-size: 1rem;
     font-weight: 600;
     cursor: pointer;
     transition: transform 0.2s, box-shadow 0.2s;
     box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

#home-container button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

/* --- Graph AI Container --- */
#graph-ai-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #000;
    z-index: 1005; /* Higher than other elements */
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

#graph-ai-title {
    position: absolute;
    top: 5%;
    color: rgba(255, 255, 255, 0.8);
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: 4px;
    text-transform: uppercase;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3), 0 0 20px rgba(13, 133, 161, 0.5);
    z-index: 1007;
}

#graph-ai-canvas {
    width: 100%;
    height: 100%;
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1006;
}

#back-to-chat-btn {
    position: fixed;
    top: 1.5rem;
    left: 1.5rem;
    padding: 0.75rem 1.25rem;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: 8px;
    cursor: pointer;
    z-index: 1007;
    transition: background-color 0.2s;
}

#back-to-chat-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
}


/* --- Voice Call Overlay --- */
#voice-call-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1010; /* Highest z-index */
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

#voice-call-overlay:not(.hidden) {
    opacity: 1;
    visibility: visible;
}

.voice-call-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    color: white;
    text-align: center;
}

.voice-status-circle {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    border: 3px solid rgba(255, 255, 255, 0.3);
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.voice-status-circle.listening::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border-radius: 50%;
    border: 3px solid #10a37f;
    animation: pulse 1.5s infinite ease-out;
}

@keyframes pulse {
    0% {
        transform: scale(0.9);
        opacity: 1;
    }
    100% {
        transform: scale(1.3);
        opacity: 0;
    }
}

#voice-status-text {
    font-size: 1.2rem;
    font-weight: 500;
}

#end-call-btn {
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 50px;
    background-color: #d9534f; /* Error color for hanging up */
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

#end-call-btn:hover {
    background-color: #c9302c;
}


@media (max-width: 600px) {
    .login-box {
        padding: 2rem;
    }
    header h1 {
        font-size: 1.2rem;
    }
    .input-wrapper {
        flex-wrap: wrap;
    }
    #input-area button {
        flex-grow: 1;
    }
    .chat-message {
        max-width: 90%;
    }
}