/* Ultra Modern Apple-Inspired chimera */

/* CSS Reset & Apple System Fonts */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

/* Apple System Font Stack */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', system-ui, sans-serif;
    background: linear-gradient(135deg, #000000 0%, #1c1c1e 25%, #2c2c2e 50%, #48448a 75%, #007aff 100%);
    background-attachment: fixed;
    min-height: 100vh;
    overflow: hidden;
    color: #ffffff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "kern" 1;
    text-rendering: optimizeLegibility;
}

/* Dynamic Background Animation */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(0, 122, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 45, 85, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(88, 86, 214, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
    animation: backgroundShift 20s ease-in-out infinite;
}

@keyframes backgroundShift {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

/* Main Container */
.container {
    display: flex;
    height: 100vh;
    max-width: 1600px;
    margin: 0 auto;
    position: relative;
    background: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    border-radius: 24px;
    border: 0.5px solid rgba(255, 255, 255, 0.1);
    box-shadow:
        0 25px 50px rgba(0, 0, 0, 0.25),
        0 0 0 1px rgba(255, 255, 255, 0.05),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    overflow: hidden;
}

/* Settings Panel - Ultra Refined */
.settings-panel {
    width: 420px;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(30px) saturate(180%);
    -webkit-backdrop-filter: blur(30px) saturate(180%);
    border-right: 0.5px solid rgba(255, 255, 255, 0.1);
    padding: 40px;
    overflow-y: auto;
    position: relative;
}

.settings-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.settings-panel h2 {
    font-size: 28px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    gap: 12px;
    letter-spacing: -0.02em;
}

.settings-panel h2 i {
    background: linear-gradient(135deg, #007aff, #5856d6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Setting Groups */
.setting-group {
    margin-bottom: 32px;
}

.setting-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #ffffff;
    font-size: 15px;
    letter-spacing: -0.01em;
}

.setting-group input,
.setting-group select {
    width: 100%;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    color: #ffffff;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    outline: none;
    font-weight: 400;
}

.setting-group input::placeholder {
    color: rgba(255, 255, 255, 0.4);
    font-weight: 400;
}

/* API Provider specific styling */
.api-provider-info {
    background: rgba(0, 122, 255, 0.1);
    border: 1px solid rgba(0, 122, 255, 0.2);
    border-radius: 8px;
    padding: 12px;
    margin-top: 8px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.8);
}

.api-provider-info.openrouter {
    background: rgba(0, 122, 255, 0.1);
    border-color: rgba(0, 122, 255, 0.3);
}

.api-provider-info.znapai {
    background: rgba(52, 199, 89, 0.1);
    border-color: rgba(52, 199, 89, 0.3);
}

.setting-group input:focus,
.setting-group select:focus {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(0, 122, 255, 0.5);
    box-shadow:
        0 0 0 3px rgba(0, 122, 255, 0.1),
        0 4px 12px rgba(0, 122, 255, 0.15);
}

.setting-group select option {
    background: #1c1c1e;
    color: #ffffff;
}

.setting-group small {
    display: block;
    margin-top: 8px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 13px;
    line-height: 1.4;
    font-weight: 400;
}

.setting-group small a {
    color: #007aff;
    text-decoration: none;
    font-weight: 500;
}

.setting-group small a:hover {
    text-decoration: underline;
}

/* Model Picker - Apple Style */
.model-picker {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 20px;
    margin-top: 8px;
    max-height: 400px;
    overflow-y: auto;
}

.model-search {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    align-items: center;
}

.model-search-input {
    flex: 1;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: white;
    font-size: 14px;
    outline: none;
}

.model-search-input::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.model-search-input:focus {
    border-color: rgba(0, 122, 255, 0.5);
    background: rgba(255, 255, 255, 0.15);
}

.select-all-btn,
.clear-all-btn,
.refresh-btn {
    padding: 8px 12px;
    background: rgba(0, 122, 255, 0.2);
    border: 1px solid rgba(0, 122, 255, 0.3);
    border-radius: 6px;
    color: #007aff;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: inherit;
}

.select-all-btn:hover,
.refresh-btn:hover {
    background: rgba(0, 122, 255, 0.3);
    transform: translateY(-1px);
}

.clear-all-btn {
    background: rgba(255, 45, 85, 0.2);
    border-color: rgba(255, 45, 85, 0.3);
    color: #ff2d55;
}

.clear-all-btn:hover {
    background: rgba(255, 45, 85, 0.3);
    transform: translateY(-1px);
}

.refresh-btn i {
    transition: transform 0.3s ease;
}

.refresh-btn:hover i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.model-search {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
    align-items: center;
}

.model-search-input {
    flex: 1;
    min-width: 150px;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: white;
    font-size: 14px;
    outline: none;
}

.selected-count {
    margin-bottom: 12px;
    padding: 8px 12px;
    background: rgba(0, 122, 255, 0.1);
    border-radius: 6px;
    text-align: center;
}

.selected-count span {
    color: #007aff;
    font-weight: 600;
    font-size: 13px;
}

.model-list {
    max-height: 280px;
    overflow-y: auto;
}

.loading-models {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    color: rgba(255, 255, 255, 0.6);
}

.loading-models i {
    margin-right: 12px;
    font-size: 16px;
}

.model-category {
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 16px;
}

.model-category:last-child {
    margin-bottom: 0;
    border-bottom: none;
    padding-bottom: 0;
}

.model-category h4 {
    color: #ffffff;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.model-item {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
    padding: 8px 12px;
    border-radius: 8px;
    transition: all 0.2s ease;
    cursor: pointer;
    position: relative;
}

.model-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

.model-item.selected {
    background: rgba(0, 122, 255, 0.15);
    border: 1px solid rgba(0, 122, 255, 0.3);
}

.model-item input[type="checkbox"] {
    margin-right: 12px;
    width: 18px;
    height: 18px;
    accent-color: #007aff;
    cursor: pointer;
}

.model-info {
    flex: 1;
}

.model-name {
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 2px;
}

.model-provider {
    color: rgba(255, 255, 255, 0.5);
    font-size: 12px;
    text-transform: capitalize;
}

.model-pricing {
    color: #30d158;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 6px;
    background: rgba(48, 209, 88, 0.2);
    border-radius: 4px;
    white-space: nowrap;
}

.model-pricing.paid {
    color: #ff9500;
    background: rgba(255, 149, 0, 0.2);
}

.model-pricing.free {
    color: #30d158;
    background: rgba(48, 209, 88, 0.2);
}

.model-item.hidden {
    display: none;
}

/* Scrollbar for model list */
.model-list::-webkit-scrollbar {
    width: 6px;
}

.model-list::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

.model-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
}

.model-list::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.4);
}

/* Workflow Preview */
.workflow-preview {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 16px;
    margin-top: 12px;
}

.workflow-preview h5 {
    color: #ffffff;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.workflow-step {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    margin-bottom: 8px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.2s ease;
}

.workflow-step:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateX(4px);
}

.workflow-step:last-child {
    margin-bottom: 0;
}

.step-number {
    background: linear-gradient(135deg, #007aff, #5856d6);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    margin-right: 12px;
    flex-shrink: 0;
}

.step-model {
    color: #007aff;
    font-weight: 600;
    font-size: 12px;
    margin-right: 8px;
    white-space: nowrap;
}

.step-task {
    color: rgba(255, 255, 255, 0.7);
    font-size: 12px;
}

/* Enhanced Range Sliders */
.setting-group input[type="range"] {
    appearance: none;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    outline: none;
    padding: 0;
    cursor: pointer;
}

.setting-group input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #007aff, #5856d6);
    border-radius: 50%;
    cursor: pointer;
    box-shadow:
        0 4px 12px rgba(0, 122, 255, 0.3),
        0 0 0 1px rgba(255, 255, 255, 0.1);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.setting-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow:
        0 6px 20px rgba(0, 122, 255, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.2);
}

.setting-group input[type="range"]::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #007aff, #5856d6);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow:
        0 4px 12px rgba(0, 122, 255, 0.3),
        0 0 0 1px rgba(255, 255, 255, 0.1);
}

/* Primary Button - Apple Style */
.btn-primary {
    width: 100%;
    padding: 16px 24px;
    background: linear-gradient(135deg, #007aff, #5856d6);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    text-transform: none;
    letter-spacing: -0.01em;
    font-family: inherit;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow:
        0 8px 25px rgba(0, 122, 255, 0.4),
        0 4px 12px rgba(0, 122, 255, 0.2);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow:
        0 4px 12px rgba(0, 122, 255, 0.3),
        0 2px 6px rgba(0, 122, 255, 0.1);
}

/* Chat Container */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
}

/* Header - Refined */
.header {
    background: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-bottom: 0.5px solid rgba(255, 255, 255, 0.1);
    padding: 24px 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

.header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.header h1 {
    font-size: 32px;
    font-weight: 700;
    color: #ffffff;
    margin: 0;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #ffffff, rgba(255, 255, 255, 0.8));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.settings-btn {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #ffffff;
    padding: 12px 20px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 500;
    font-size: 14px;
    font-family: inherit;
}

.settings-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.model-info {
    background: rgba(0, 122, 255, 0.15);
    backdrop-filter: blur(20px);
    padding: 12px 20px;
    border-radius: 20px;
    font-size: 13px;
    color: #ffffff;
    font-weight: 500;
    border: 1px solid rgba(0, 122, 255, 0.2);
    white-space: nowrap;
    max-width: 220px;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: -0.01em;
}

/* Chat Messages */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 32px 40px;
    scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar {
    width: 4px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
}

/* Welcome Message */
.welcome-message {
    text-align: center;
    padding: 120px 40px;
    color: rgba(255, 255, 255, 0.8);
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.welcome-message i {
    font-size: 80px;
    margin-bottom: 32px;
    background: linear-gradient(135deg, #007aff, #5856d6, #ff2d55);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
}

.welcome-message h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    color: #ffffff;
    letter-spacing: -0.02em;
}

.welcome-message p {
    font-size: 17px;
    line-height: 1.6;
    margin-bottom: 12px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 400;
}

/* Message Styles - Apple Quality */
.message {
    margin-bottom: 32px;
    display: flex;
    gap: 16px;
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.message-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: white;
    font-size: 14px;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
    box-shadow:
        0 4px 12px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.1);
}

.message.user .message-avatar {
    background: linear-gradient(135deg, #34c759, #30d158);
}

.message.assistant .message-avatar {
    background: linear-gradient(135deg, #007aff, #5856d6);
}

.message-avatar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 50%;
    padding: 1px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.1));
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: exclude;
    -webkit-mask-composite: xor;
}

.message-content {
    max-width: 80%;
    padding: 20px 24px;
    border-radius: 20px;
    line-height: 1.7;
    word-wrap: break-word;
    position: relative;
    backdrop-filter: blur(20px);
    font-size: 16px;
    letter-spacing: -0.01em;
}

.message.user .message-content {
    background: linear-gradient(135deg, rgba(52, 199, 89, 0.9), rgba(48, 209, 88, 0.9));
    color: white;
    border-bottom-right-radius: 6px;
    margin-left: auto;
    box-shadow: 0 4px 12px rgba(52, 199, 89, 0.3);
}

.message.assistant .message-content {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(30px) saturate(180%);
    -webkit-backdrop-filter: blur(30px) saturate(180%);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom-left-radius: 6px;
    box-shadow:
        0 4px 12px rgba(0, 0, 0, 0.1),
        0 1px 3px rgba(0, 0, 0, 0.05);
}

.message.assistant .message-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

/* Code Formatting - Apple Style */
.message.assistant .message-content code {
    background: rgba(0, 0, 0, 0.4);
    padding: 4px 8px;
    border-radius: 6px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    font-size: 14px;
    color: #0a84ff;
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-weight: 500;
}

.message.assistant .message-content pre {
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 12px;
    overflow-x: auto;
    margin: 16px 0;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    font-size: 14px;
    line-height: 1.6;
}

.message.assistant .message-content pre code {
    background: none;
    padding: 0;
    color: #f2f2f7;
}

/* Chat Input - Refined */
.chat-input-container {
    background: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-top: 0.5px solid rgba(255, 255, 255, 0.1);
    padding: 24px 40px;
}

.input-wrapper {
    display: flex;
    gap: 12px;
    align-items: flex-end;
    margin-bottom: 16px;
    position: relative;
}

#messageInput {
    flex: 1;
    min-height: 56px;
    max-height: 160px;
    padding: 18px 24px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 28px;
    resize: none;
    font-family: inherit;
    font-size: 16px;
    line-height: 1.6;
    color: white;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    outline: none;
    font-weight: 400;
    letter-spacing: -0.01em;
}

#messageInput::placeholder {
    color: rgba(255, 255, 255, 0.4);
    font-weight: 400;
}

#messageInput:focus {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(0, 122, 255, 0.5);
    box-shadow:
        0 0 0 3px rgba(0, 122, 255, 0.1),
        0 4px 12px rgba(0, 122, 255, 0.15);
}

.send-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, #007aff, #5856d6);
    color: white;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.send-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transition: all 0.3s ease;
    transform: translate(-50%, -50%);
}

.send-btn:hover::before {
    width: 100%;
    height: 100%;
}

.send-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 8px 25px rgba(0, 122, 255, 0.4);
}

.send-btn:active {
    transform: translateY(0) scale(0.95);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.send-btn:disabled {
    background: rgba(255, 255, 255, 0.2);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.input-info {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    font-weight: 500;
    letter-spacing: 0.01em;
}

/* Loading Overlay - Apple Style */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(20px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    flex-direction: column;
    color: white;
}

.loading-overlay.show {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top: 3px solid #007aff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 24px;
}

.loading-overlay p {
    font-size: 16px;
    font-weight: 500;
    letter-spacing: -0.01em;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Toast Notifications - Apple Style */
.toast {
    position: fixed;
    top: 40px;
    right: 40px;
    background: rgba(28, 28, 30, 0.95);
    backdrop-filter: blur(30px) saturate(180%);
    -webkit-backdrop-filter: blur(30px) saturate(180%);
    color: white;
    padding: 20px 24px;
    border-radius: 16px;
    transform: translateX(400px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
    max-width: 360px;
    border: 0.5px solid rgba(255, 255, 255, 0.1);
    box-shadow:
        0 25px 50px rgba(0, 0, 0, 0.25),
        0 0 0 1px rgba(255, 255, 255, 0.05);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.toast.show {
    transform: translateX(0);
    animation: slideInRight 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast.success {
    border-left: 4px solid #30d158;
}

.toast.error {
    border-left: 4px solid #ff3b30;
}

.toast.warning {
    border-left: 4px solid #ff9500;
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Responsive Design - Apple Breakpoints */
@media (max-width: 1200px) {
    .settings-panel {
        width: 380px;
        padding: 32px;
    }

    .header {
        padding: 20px 32px;
    }

    .chat-messages {
        padding: 28px 32px;
    }

    .welcome-message {
        padding: 100px 32px;
    }
}

@media (max-width: 1024px) {
    .container {
        margin: 0;
        height: 100vh;
        border-radius: 0;
    }

    .settings-panel {
        width: 360px;
        padding: 28px;
    }

    .header {
        padding: 18px 28px;
    }

    .header h1 {
        font-size: 28px;
    }

    .chat-messages {
        padding: 24px 28px;
    }

    .welcome-message {
        padding: 80px 28px;
    }

    .welcome-message h2 {
        font-size: 32px;
    }

    .chat-input-container {
        padding: 20px 28px;
    }
}

@media (max-width: 768px) {
    .settings-panel {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        width: 100%;
        max-width: 420px;
        transform: translateX(-100%);
        z-index: 200;
        padding: 32px;
        border-radius: 0;
    }

    .settings-panel.show {
        transform: translateX(0);
        animation: slideInLeft 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    @keyframes slideInLeft {
        from {
            transform: translateX(-100%);
            opacity: 0;
        }
        to {
            transform: translateX(0);
            opacity: 1;
        }
    }

    .header h1 {
        font-size: 24px;
    }

    .model-info {
        font-size: 12px;
        padding: 10px 16px;
        max-width: 140px;
    }

    .message-content {
        max-width: 85%;
        padding: 16px 20px;
        font-size: 15px;
    }

    .welcome-message {
        padding: 60px 24px;
    }

    .welcome-message h2 {
        font-size: 28px;
    }

    .welcome-message p {
        font-size: 16px;
    }

    .chat-messages {
        padding: 20px 24px;
    }

    .chat-input-container {
        padding: 16px 24px;
    }

    #messageInput {
        min-height: 50px;
        padding: 16px 20px;
        font-size: 15px;
    }

    .send-btn {
        width: 50px;
        height: 50px;
    }
}

@media (max-width: 480px) {
    .settings-panel {
        padding: 24px;
    }

    .header {
        padding: 16px 20px;
    }

    .header h1 {
        font-size: 20px;
    }

    .chat-input-container {
        padding: 12px 20px;
    }

    .chat-messages {
        padding: 16px 20px;
    }

    #messageInput {
        min-height: 48px;
        padding: 14px 18px;
    }

    .send-btn {
        width: 48px;
        height: 48px;
    }

    .toast {
        top: 20px;
        right: 20px;
        left: 20px;
        max-width: none;
    }
}

/* High Performance Animations */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .container {
        background: rgba(0, 0, 0, 0.95);
        border: 2px solid white;
    }

    .message.user .message-content,
    .message.assistant .message-content {
        background: rgba(0, 0, 0, 0.9);
        border: 2px solid white;
        color: white;
    }
}

/* Focus Management for Accessibility */
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid #007aff;
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }

    .container {
        background: white;
        box-shadow: none;
        border: 1px solid #ccc;
    }

    .settings-panel,
    .header,
    .chat-input-container,
    .loading-overlay,
    .toast {
        display: none;
    }

    .message.assistant .message-content {
        background: white;
        border: 1px solid #ccc;
        color: black;
    }
}