/* ═══════════════════════════════════════════════════════════════════════════
   ZYPHERIUS CHAT — Neon Cyan Theme (Emergent Style)
   ═══════════════════════════════════════════════════════════════════════════ */

@property --border-angle {
  syntax: "<angle>";
  inherits: false;
  initial-value: 0deg;
}

:root {
    /* === NEON COLORS === */
    --neon-cyan: #00FFFF;
    --neon-cyan-dark: #00CED1;
    --neon-cyan-light: #7FFFD4;
    --neon-blue: #1E90FF;
    --neon-glow: rgba(0, 255, 255, 0.4);
    --neon-glow-strong: rgba(0, 255, 255, 0.7);
    
    /* === BACKGROUNDS === */
    --bg-primary: #0A0A0A;
    --bg-secondary: #0D0D0D;
    --bg-tertiary: #141414;
    --bg-elevated: #1A1A1A;
    --bg-hover: rgba(0, 255, 255, 0.08);
    --bg-active: rgba(0, 255, 255, 0.12);
    
    /* === GLASS === */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-bg-hover: rgba(0, 255, 255, 0.06);
    --glass-border: rgba(0, 255, 255, 0.15);
    --glass-border-hover: rgba(0, 255, 255, 0.4);
    
    /* === TEXT === */
    --text-primary: #FFFFFF;
    --text-secondary: #B0B0B0;
    --text-muted: #707070;
    --text-cyan: #00FFFF;
    
    /* === GRADIENTS === */
    --gradient-cyan: linear-gradient(135deg, #00CED1 0%, #00FFFF 100%);
    --gradient-title: linear-gradient(135deg, #FFFFFF 0%, #00FFFF 50%, #00CED1 100%);
    
    /* === SPACING === */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    
    /* === BORDER RADIUS === */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* === TYPOGRAPHY === */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    
    /* === LAYOUT === */
    --sidebar-width: 260px;
    --header-height: 56px;
    
    /* === TRANSITIONS === */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

/* === ANIMATIONS === */
@keyframes borderRotate {
    0% { --border-angle: 0deg; }
    100% { --border-angle: 360deg; }
}

@keyframes glowPulse {
    0%, 100% { 
        box-shadow: 0 0 15px var(--neon-glow);
        opacity: 0.8;
    }
    50% { 
        box-shadow: 0 0 25px var(--neon-glow-strong);
        opacity: 1;
    }
}

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

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    overflow: hidden;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
}

/* ═══════════════════════════════════════════════════════════════════════════
   LAYOUT
   ═══════════════════════════════════════════════════════════════════════════ */

.app {
    display: flex;
    height: 100vh;
    position: relative;
    background: var(--bg-primary);
}

/* Grid background effect */
.app::before {
    content: '';
    position: fixed;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 80%, rgba(0, 255, 255, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(30, 144, 255, 0.04) 0%, transparent 50%),
        linear-gradient(90deg, rgba(0, 255, 255, 0.015) 1px, transparent 1px),
        linear-gradient(rgba(0, 255, 255, 0.015) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 60px 60px, 60px 60px;
    pointer-events: none;
    z-index: 0;
}

/* ═══════════════════════════════════════════════════════════════════════════
   SIDEBAR
   ═══════════════════════════════════════════════════════════════════════════ */

.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, rgba(13, 13, 13, 0.98) 0%, rgba(10, 10, 10, 0.99) 100%);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    border-right: 1px solid var(--glass-border);
    position: relative;
    z-index: 10;
    backdrop-filter: blur(20px);
}

/* Sidebar glow line */
.sidebar::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(
        180deg,
        transparent 0%,
        var(--neon-cyan) 20%,
        var(--neon-cyan) 80%,
        transparent 100%
    );
    opacity: 0.3;
    animation: glowPulse 3s ease-in-out infinite;
}

.sidebar-header {
    padding: var(--space-4);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    padding: var(--space-2);
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: var(--gradient-cyan);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    color: #0A0A0A;
    box-shadow: 0 0 20px var(--neon-glow);
    transition: all var(--transition-normal);
}

.logo:hover .logo-icon {
    box-shadow: 0 0 30px var(--neon-glow-strong);
    transform: scale(1.05);
}

.new-chat-btn {
    width: 100%;
    margin-top: var(--space-3);
    padding: var(--space-3);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    transition: all var(--transition-normal);
}

.new-chat-btn:hover {
    background: var(--bg-hover);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 15px var(--neon-glow);
}

/* Search */
.sidebar-search {
    padding: var(--space-2) var(--space-4);
}

.search-wrapper {
    position: relative;
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    width: 16px;
    height: 16px;
    transition: color var(--transition-fast);
}

.search-input {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    padding-left: 36px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 13px;
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--neon-cyan);
    box-shadow: 0 0 15px var(--neon-glow);
    background: rgba(0, 255, 255, 0.05);
}

.search-input:focus + .search-icon,
.search-wrapper:focus-within .search-icon {
    color: var(--neon-cyan);
}

.search-input::placeholder {
    color: var(--text-muted);
}

/* Chat list */
.chat-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-2);
}

.chat-list-section {
    margin-bottom: var(--space-3);
}

.chat-list-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: var(--space-2) var(--space-3);
}

.chat-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    border: 1px solid transparent;
}

.chat-item:hover {
    background: var(--bg-hover);
    border-color: var(--glass-border);
}

.chat-item.active {
    background: var(--bg-active);
    border-color: var(--glass-border-hover);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.1);
}

.chat-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: var(--neon-cyan);
    border-radius: 0 3px 3px 0;
    box-shadow: 0 0 10px var(--neon-cyan);
}

.chat-item-icon {
    width: 16px;
    height: 16px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.chat-item.active .chat-item-icon {
    color: var(--neon-cyan);
}

.chat-item-content {
    flex: 1;
    min-width: 0;
}

.chat-item-title {
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.chat-item:hover .chat-item-title,
.chat-item.active .chat-item-title {
    color: var(--text-primary);
}

.chat-item-meta {
    font-size: 11px;
    color: var(--text-muted);
}

.chat-item-actions {
    display: none;
    gap: 2px;
}

.chat-item:hover .chat-item-actions {
    display: flex;
}

.chat-item-btn {
    padding: 4px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-item-btn:hover {
    background: var(--glass-bg);
    color: var(--neon-cyan);
}

/* Sidebar footer */
.sidebar-footer {
    padding: var(--space-3);
    border-top: 1px solid var(--glass-border);
}

.credits-display {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-2) var(--space-3);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2);
}

.credits-info {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 13px;
}

.credits-icon {
    color: var(--neon-cyan);
    width: 16px;
    height: 16px;
    filter: drop-shadow(0 0 4px var(--neon-cyan));
}

.credits-amount {
    font-weight: 600;
    color: var(--neon-cyan);
    text-shadow: 0 0 10px var(--neon-glow);
}

.buy-credits-btn {
    padding: var(--space-1) var(--space-3);
    background: var(--gradient-cyan);
    border: none;
    border-radius: var(--radius-sm);
    color: #0A0A0A;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 0 10px var(--neon-glow);
}

.buy-credits-btn:hover {
    box-shadow: 0 0 20px var(--neon-glow-strong);
    transform: translateY(-1px);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.user-menu:hover {
    background: var(--bg-hover);
    border-color: var(--glass-border);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--gradient-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 500;
    color: #0A0A0A;
    overflow: hidden;
    box-shadow: 0 0 10px var(--neon-glow);
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-info {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-email {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ═══════════════════════════════════════════════════════════════════════════
   MAIN CONTENT
   ═══════════════════════════════════════════════════════════════════════════ */

.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    position: relative;
    z-index: 1;
}

/* Header */
.header {
    height: var(--header-height);
    padding: 0 var(--space-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--glass-border);
    background: rgba(13, 13, 13, 0.8);
    backdrop-filter: blur(20px);
    flex-shrink: 0;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.mobile-menu-btn {
    display: none;
    padding: var(--space-2);
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
}

.model-selector {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.model-selector label {
    font-size: 13px;
    color: var(--text-muted);
}

.model-select {
    padding: var(--space-2) var(--space-4);
    padding-right: 32px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2300FFFF' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    transition: all var(--transition-fast);
}

.model-select:hover {
    border-color: var(--glass-border-hover);
}

.model-select:focus {
    outline: none;
    border-color: var(--neon-cyan);
    box-shadow: 0 0 15px var(--neon-glow);
}

.model-badge {
    padding: 2px var(--space-2);
    background: rgba(0, 255, 255, 0.15);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 500;
    color: var(--neon-cyan);
}

.model-badge.paid {
    background: rgba(255, 180, 0, 0.15);
    border-color: rgba(255, 180, 0, 0.3);
    color: #FFB400;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.header-btn {
    padding: var(--space-2);
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-btn:hover {
    background: var(--bg-hover);
    border-color: var(--glass-border);
    color: var(--neon-cyan);
}

/* ═══════════════════════════════════════════════════════════════════════════
   MESSAGES AREA
   ═══════════════════════════════════════════════════════════════════════════ */

.messages-container {
    flex: 1;
    overflow-y: auto;
    scroll-behavior: smooth;
}

.messages {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-4);
}

/* Welcome screen */
.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    padding: var(--space-8);
    animation: fadeIn 0.5s ease;
}

.welcome-logo {
    width: 64px;
    height: 64px;
    background: var(--gradient-cyan);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    color: #0A0A0A;
    margin-bottom: var(--space-5);
    box-shadow: 0 0 40px var(--neon-glow-strong);
    animation: float 3s ease-in-out infinite, glowPulse 2s ease-in-out infinite;
}

.welcome-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: var(--space-2);
    background: var(--gradient-title);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-subtitle {
    color: var(--text-muted);
    margin-bottom: var(--space-8);
    max-width: 450px;
    font-size: 14px;
    line-height: 1.7;
}

.suggestions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
    max-width: 560px;
    width: 100%;
}

.suggestion-card {
    padding: var(--space-4);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: left;
    backdrop-filter: blur(12px);
}

.suggestion-card:hover {
    background: var(--glass-bg-hover);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 20px var(--neon-glow);
    transform: translateY(-2px);
}

.suggestion-icon {
    font-size: 20px;
    margin-bottom: var(--space-2);
}

.suggestion-title {
    font-weight: 500;
    font-size: 14px;
    margin-bottom: 2px;
    color: var(--text-primary);
}

.suggestion-desc {
    font-size: 12px;
    color: var(--text-muted);
}

/* Message */
.message {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-5) 0;
    animation: fadeIn 0.3s ease;
}

.message + .message {
    border-top: 1px solid var(--glass-border);
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 500;
}

.message.user .message-avatar {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
}

.message.assistant .message-avatar {
    background: var(--gradient-cyan);
    color: #0A0A0A;
    box-shadow: 0 0 15px var(--neon-glow);
}

.message.assistant .message-avatar.gpt {
    background: linear-gradient(135deg, #10a37f 0%, #0d8a6a 100%);
    box-shadow: 0 0 15px rgba(16, 163, 127, 0.4);
}

.message.assistant .message-avatar.claude {
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
    box-shadow: 0 0 15px rgba(217, 119, 6, 0.4);
}

.message-content {
    flex: 1;
    min-width: 0;
}

.message-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}

.message-role {
    font-weight: 600;
    font-size: 14px;
}

.message-model {
    font-size: 11px;
    color: var(--text-muted);
    padding: 2px 8px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
}

.message-body {
    font-size: 14px;
    line-height: 1.75;
    color: var(--text-secondary);
}

.message-body p {
    margin-bottom: var(--space-3);
}

.message-body p:last-child {
    margin-bottom: 0;
}

.message-body ul, .message-body ol {
    margin: var(--space-3) 0;
    padding-left: var(--space-5);
}

.message-body li {
    margin-bottom: var(--space-1);
}

.message-body strong {
    font-weight: 600;
    color: var(--text-primary);
}

/* Message actions */
.message-actions {
    display: flex;
    gap: var(--space-1);
    margin-top: var(--space-3);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.message:hover .message-actions {
    opacity: 1;
}

.action-btn {
    padding: var(--space-1) var(--space-2);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all var(--transition-fast);
}

.action-btn:hover {
    background: var(--bg-hover);
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
}

/* Code blocks */
.code-block {
    position: relative;
    background: #0A0A0A;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin: var(--space-4) 0;
    border: 1px solid var(--glass-border);
}

.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-2) var(--space-3);
    background: rgba(0, 255, 255, 0.03);
    border-bottom: 1px solid var(--glass-border);
}

.code-lang {
    font-size: 12px;
    color: var(--neon-cyan);
    font-family: var(--font-mono);
}

.code-copy-btn {
    padding: 4px 10px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
}

.code-copy-btn:hover {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 0 10px var(--neon-glow);
}

.code-copy-btn.copied {
    color: var(--neon-cyan);
    border-color: var(--neon-cyan);
}

.code-block pre {
    margin: 0;
    padding: var(--space-4);
    overflow-x: auto;
}

.code-block code {
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.6;
}

/* Inline code */
.message-body code:not(pre code) {
    padding: 2px 8px;
    background: rgba(0, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--neon-cyan);
}

/* Typing indicator */
.typing-indicator {
    display: flex;
    gap: 6px;
    padding: var(--space-2);
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--neon-cyan);
    border-radius: 50%;
    animation: typingDots 1.4s infinite ease-in-out;
    box-shadow: 0 0 8px var(--neon-cyan);
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingDots {
    0%, 80%, 100% { 
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% { 
        transform: scale(1);
        opacity: 1;
    }
}

/* ═══════════════════════════════════════════════════════════════════════════
   INPUT AREA
   ═══════════════════════════════════════════════════════════════════════════ */

.input-area {
    padding: var(--space-4);
    background: linear-gradient(to top, var(--bg-primary), transparent);
}

.input-container {
    max-width: 800px;
    margin: 0 auto;
}

.input-wrapper {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
    overflow: hidden;
}

/* Animated border on focus */
.input-wrapper::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: conic-gradient(
        from var(--border-angle),
        transparent 0%, 
        transparent 70%,
        var(--neon-cyan) 75%, 
        var(--neon-cyan-dark) 80%, 
        var(--neon-cyan) 85%,
        transparent 90%, 
        transparent 100%
    );
    border-radius: 18px;
    animation: borderRotate 4s linear infinite;
    z-index: -1;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.input-wrapper:focus-within::before {
    opacity: 0.8;
}

.input-wrapper:focus-within {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 20px var(--neon-glow);
}

.input-toolbar {
    display: flex;
    align-items: center;
    padding: var(--space-2) var(--space-3);
    gap: var(--space-1);
}

.toolbar-btn {
    padding: var(--space-2);
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.toolbar-btn:hover {
    background: var(--bg-hover);
    color: var(--neon-cyan);
}

.chat-input {
    width: 100%;
    min-height: 52px;
    max-height: 200px;
    padding: 0 var(--space-4);
    padding-bottom: var(--space-2);
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
    line-height: 1.5;
    resize: none;
    overflow-y: auto;
}

.chat-input:focus {
    outline: none;
}

.chat-input::placeholder {
    color: var(--text-muted);
}

.input-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-2) var(--space-3);
}

.input-info {
    font-size: 11px;
    color: var(--text-muted);
}

.input-info kbd {
    padding: 2px 6px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--neon-cyan);
}

.send-btn {
    padding: var(--space-2) var(--space-4);
    background: var(--gradient-cyan);
    border: none;
    border-radius: var(--radius-lg);
    color: #0A0A0A;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 600;
    font-size: 13px;
    transition: all var(--transition-normal);
    box-shadow: 0 0 15px var(--neon-glow);
}

.send-btn:hover:not(:disabled) {
    box-shadow: 0 0 25px var(--neon-glow-strong);
    transform: translateY(-1px);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.send-btn.stop-btn {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.4);
}

.send-btn.stop-btn:hover {
    box-shadow: 0 0 25px rgba(239, 68, 68, 0.6);
}

/* File preview */
.file-preview {
    display: none;
    flex-wrap: wrap;
    gap: var(--space-2);
    padding: var(--space-3);
    border-bottom: 1px solid var(--glass-border);
}

.file-preview.show {
    display: flex;
}

.file-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    font-size: 13px;
}

.file-item img {
    width: 32px;
    height: 32px;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

.file-item-name {
    max-width: 120px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-secondary);
}

.file-remove-btn {
    padding: 2px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
    transition: color var(--transition-fast);
}

.file-remove-btn:hover {
    color: #ef4444;
}

/* ═══════════════════════════════════════════════════════════════════════════
   MODALS
   ═══════════════════════════════════════════════════════════════════════════ */

.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-overlay.show {
    display: flex;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--neon-cyan);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 420px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 0 40px var(--neon-glow-strong);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--glass-border);
}

.modal-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--neon-cyan);
}

.modal-close {
    padding: var(--space-1);
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    color: var(--neon-cyan);
    background: var(--bg-hover);
}

.modal-body {
    padding: var(--space-5);
}

/* Settings */
.setting-group {
    margin-bottom: var(--space-5);
}

.setting-group:last-child {
    margin-bottom: 0;
}

.setting-label {
    display: block;
    font-weight: 500;
    font-size: 14px;
    margin-bottom: var(--space-1);
}

.setting-desc {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: var(--space-2);
}

.setting-input {
    width: 100%;
    padding: var(--space-3);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 13px;
    transition: all var(--transition-fast);
}

.setting-input:focus {
    outline: none;
    border-color: var(--neon-cyan);
    box-shadow: 0 0 15px var(--neon-glow);
}

.setting-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
}

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

.toggle-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    transition: all var(--transition-fast);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    left: 2px;
    bottom: 2px;
    background: var(--text-muted);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--neon-cyan);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 10px var(--neon-glow);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(20px);
    background: #0A0A0A;
}

/* ═══════════════════════════════════════════════════════════════════════════
   SCROLLBAR
   ═══════════════════════════════════════════════════════════════════════════ */

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 255, 255, 0.2);
    box-shadow: 0 0 8px var(--neon-glow);
}

/* ═══════════════════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════════════════ */

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: 100;
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .mobile-menu-btn {
        display: flex;
    }

    .suggestions {
        grid-template-columns: 1fr;
    }
    
    .messages {
        padding: var(--space-3);
    }
    
    .input-area {
        padding: var(--space-3);
    }
}

/* ═══════════════════════════════════════════════════════════════════════════
   IMPROVED MESSAGE CARDS (Claude-style)
   ═══════════════════════════════════════════════════════════════════════════ */

/* Better text readability */
.message-body {
    font-size: 15px;
    line-height: 1.8;
    color: #E8E8E8;
    letter-spacing: 0.01em;
}

.message-body p {
    margin-bottom: var(--space-4);
}

/* Assistant messages as cards */
.message.assistant {
    background: rgba(0, 255, 255, 0.03);
    border: 1px solid rgba(0, 255, 255, 0.12);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    margin: var(--space-3) 0;
}

.message.assistant + .message.assistant {
    border-top: none;
    margin-top: calc(var(--space-3) * -1);
    border-top-left-radius: 0;
    border-top-right-radius: 0;
}

/* User messages - cleaner look */
.message.user {
    background: transparent;
    border: none;
    padding: var(--space-4) 0;
}

.message.user .message-body {
    color: #FFFFFF;
    font-weight: 400;
}

/* Steps indicator for assistant */
.message.assistant .message-header::after {
    content: '';
    flex: 1;
}

/* Card header with subtle separator */
.message.assistant .message-header {
    padding-bottom: var(--space-2);
    margin-bottom: var(--space-3);
    border-bottom: 1px solid rgba(0, 255, 255, 0.08);
}

/* Collapsible sections styling */
.message-section {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(0, 255, 255, 0.1);
    border-radius: var(--radius-md);
    margin: var(--space-3) 0;
    overflow: hidden;
}

.message-section-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3);
    cursor: pointer;
    transition: background var(--transition-fast);
    color: var(--text-secondary);
    font-size: 13px;
}

.message-section-header:hover {
    background: rgba(0, 255, 255, 0.05);
}

.message-section-header svg {
    width: 16px;
    height: 16px;
    color: var(--neon-cyan);
    transition: transform var(--transition-fast);
}

.message-section.expanded .message-section-header svg {
    transform: rotate(180deg);
}

.message-section-content {
    padding: 0 var(--space-3) var(--space-3);
    display: none;
}

.message-section.expanded .message-section-content {
    display: block;
}

/* Thought process / Steps indicator */
.steps-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    background: rgba(0, 255, 255, 0.08);
    border: 1px solid rgba(0, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: 12px;
    color: var(--neon-cyan);
    margin-bottom: var(--space-3);
}

.steps-indicator svg {
    width: 14px;
    height: 14px;
}

/* Tool calls styling */
.tool-call {
    background: rgba(10, 10, 10, 0.8);
    border: 1px solid rgba(0, 255, 255, 0.15);
    border-radius: var(--radius-md);
    margin: var(--space-3) 0;
    overflow: hidden;
}

.tool-call-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: rgba(0, 255, 255, 0.05);
    border-bottom: 1px solid rgba(0, 255, 255, 0.1);
    font-size: 13px;
    font-family: var(--font-mono);
    color: var(--neon-cyan);
}

.tool-call-header .tool-icon {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--neon-cyan);
    color: #0A0A0A;
    border-radius: 4px;
    font-size: 10px;
    font-weight: bold;
}

.tool-call-body {
    padding: var(--space-3);
}

.tool-call-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-1);
}

.tool-call-content {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    overflow-x: auto;
}

/* Improved code blocks */
.code-block {
    background: #050505;
    border: 1px solid rgba(0, 255, 255, 0.15);
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.code-header {
    background: rgba(0, 255, 255, 0.05);
    border-bottom: 1px solid rgba(0, 255, 255, 0.1);
}

.code-block code {
    color: #E8E8E8;
}

/* Better inline code */
.message-body code:not(pre code) {
    padding: 3px 8px;
    background: rgba(0, 255, 255, 0.12);
    border: 1px solid rgba(0, 255, 255, 0.2);
    color: #7FFFD4;
    font-size: 13px;
}

/* Lists styling */
.message-body ul, .message-body ol {
    margin: var(--space-4) 0;
    padding-left: var(--space-6);
}

.message-body li {
    margin-bottom: var(--space-2);
    color: #E0E0E0;
}

.message-body li::marker {
    color: var(--neon-cyan);
}

/* Blockquotes */
.message-body blockquote {
    border-left: 3px solid var(--neon-cyan);
    padding-left: var(--space-4);
    margin: var(--space-4) 0;
    color: var(--text-secondary);
    font-style: italic;
}

/* Headers in messages */
.message-body h1, .message-body h2, .message-body h3 {
    color: #FFFFFF;
    margin-top: var(--space-5);
    margin-bottom: var(--space-3);
}

.message-body h1 { font-size: 1.5em; }
.message-body h2 { font-size: 1.3em; }
.message-body h3 { font-size: 1.1em; }

/* Links */
.message-body a {
    color: var(--neon-cyan);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all var(--transition-fast);
}

.message-body a:hover {
    border-bottom-color: var(--neon-cyan);
    text-shadow: 0 0 8px var(--neon-glow);
}

/* Tables */
.message-body table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-4) 0;
}

.message-body th, .message-body td {
    padding: var(--space-2) var(--space-3);
    border: 1px solid rgba(0, 255, 255, 0.15);
    text-align: left;
}

.message-body th {
    background: rgba(0, 255, 255, 0.08);
    color: var(--neon-cyan);
    font-weight: 600;
}

.message-body tr:hover {
    background: rgba(0, 255, 255, 0.03);
}

/* Typing with cursor */
.typing-cursor::after {
    content: '▊';
    animation: blink 1s infinite;
    color: var(--neon-cyan);
    text-shadow: 0 0 8px var(--neon-cyan);
    margin-left: 2px;
}

@keyframes blink {
    0%, 49% { opacity: 1; }
    50%, 100% { opacity: 0; }
}

/* Message timestamp */
.message-time {
    font-size: 11px;
    color: var(--text-muted);
    margin-left: auto;
}

/* Divider between conversations */
.message-divider {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin: var(--space-6) 0;
    color: var(--text-muted);
    font-size: 12px;
}

.message-divider::before,
.message-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 255, 255, 0.2), transparent);
}

/* ═══════════════════════════════════════════════════════════════════════════
   STREAMING CODE STYLES
   ═══════════════════════════════════════════════════════════════════════════ */

/* Streaming code block */
.code-block.streaming {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 15px var(--neon-glow);
}

.code-block.streaming .code-header {
    background: rgba(0, 255, 255, 0.1);
}

.streaming-indicator {
    font-size: 11px;
    color: var(--neon-cyan);
    animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Typing cursor */
.typing-cursor {
    display: inline-block;
    width: 2px;
    height: 1em;
    background: var(--neon-cyan);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: blink 0.8s step-end infinite;
    box-shadow: 0 0 8px var(--neon-cyan);
}

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

/* Cursor in code block */
.code-block .typing-cursor {
    display: inline;
    background: var(--neon-cyan);
    box-shadow: 0 0 5px var(--neon-cyan);
}

/* Smooth streaming animation */
.message-body {
    transition: none;
}

/* Code text during streaming - ensure visibility */
.code-block.streaming code {
    white-space: pre-wrap;
    word-break: break-all;
}

/* ═══════════════════════════════════════════════════════════════════════════
   IMAGE SUPPORT STYLES
   ═══════════════════════════════════════════════════════════════════════════ */

/* Image preview in file area */
.image-preview-item {
    position: relative;
}

.image-preview-item img {
    width: 48px;
    height: 48px;
    object-fit: cover;
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
}

/* Message images */
.message-images {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.message-image {
    max-width: 300px;
    max-height: 200px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    transition: all var(--transition-fast);
    object-fit: cover;
}

.message-image:hover {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 15px var(--neon-glow);
    transform: scale(1.02);
}

/* Image modal (fullscreen view) */
.image-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(8px);
}

.image-modal-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    border-radius: var(--radius-lg);
    box-shadow: 0 0 40px var(--neon-glow-strong);
    z-index: 1;
}

.image-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-size: 20px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 2;
    transition: all var(--transition-fast);
}

.image-modal-close:hover {
    background: var(--neon-cyan);
    color: #0A0A0A;
    border-color: var(--neon-cyan);
}

/* Drag and drop styling */
.input-wrapper.drag-over {
    border-color: var(--neon-cyan) !important;
    background: rgba(0, 255, 255, 0.05) !important;
    box-shadow: 0 0 30px var(--neon-glow) !important;
}

.input-wrapper.drag-over::after {
    content: '📷 Drop image here';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 255, 255, 0.1);
    color: var(--neon-cyan);
    font-size: 16px;
    font-weight: 600;
    border-radius: inherit;
    pointer-events: none;
}

/* File preview container */
.file-preview {
    display: none;
    flex-wrap: wrap;
    gap: var(--space-2);
    padding: var(--space-3);
    border-bottom: 1px solid var(--glass-border);
    background: rgba(0, 255, 255, 0.03);
}

.file-preview.show {
    display: flex;
}

.file-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    font-size: 13px;
}

.file-item-name {
    max-width: 100px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-secondary);
}

.file-remove-btn {
    padding: 2px 6px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
    transition: color var(--transition-fast);
    border-radius: 4px;
}

.file-remove-btn:hover {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

/* Attachment button styling */
#attachBtn {
    position: relative;
}

#attachBtn::after {
    content: '📷';
    position: absolute;
    top: -2px;
    right: -2px;
    font-size: 8px;
}

/* Hide file input */
#fileInput {
    display: none;
}

/* Accept only images hint */
.input-toolbar .toolbar-btn[title*="image"]::before {
    content: 'Images';
    font-size: 10px;
    position: absolute;
    bottom: -14px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-muted);
    white-space: nowrap;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.input-toolbar .toolbar-btn[title*="image"]:hover::before {
    opacity: 1;
}

/* ═══════════════════════════════════════════════════════════════════════════
   VOICE INPUT STYLES
   ═══════════════════════════════════════════════════════════════════════════ */

#voiceBtn.recording {
    background: rgba(255, 0, 0, 0.2) !important;
    border-color: #ff4444 !important;
    color: #ff4444 !important;
    animation: voicePulse 1s ease-in-out infinite;
}

#voiceBtn.recording svg {
    fill: #ff4444;
}

@keyframes voicePulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(255, 68, 68, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(255, 68, 68, 0);
    }
}

/* Voice indicator in input */
.voice-indicator {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: rgba(255, 68, 68, 0.1);
    border: 1px solid rgba(255, 68, 68, 0.3);
    border-radius: 20px;
    color: #ff4444;
    font-size: 12px;
    animation: voicePulse 1s ease-in-out infinite;
}

.voice-indicator::before {
    content: '';
    width: 8px;
    height: 8px;
    background: #ff4444;
    border-radius: 50%;
    animation: blink 0.5s ease-in-out infinite;
}