/* iMessage-style Chat UI */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --imessage-blue: #007AFF;
    --imessage-gray: #E9E9EB;
    --imessage-text-dark: #000000;
    --imessage-text-light: #ffffff;
    --imessage-time: #8E8E93;
    --imessage-bg: #ffffff;
    --imessage-input-bg: #F2F2F7;
    --imessage-border: #C6C6C8;
    --success-color: #34C759;
    --warning-color: #FF9500;
    --error-color: #FF3B30;
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Helvetica Neue', sans-serif;
    font-size: 16px;
    line-height: 1.4;
    color: var(--imessage-text-dark);
    background: var(--imessage-input-bg);
    -webkit-font-smoothing: antialiased;
    /* Prevent overscroll bounce */
    overscroll-behavior: none;
    /* Disable text selection for app-like feel */
    -webkit-user-select: none;
    user-select: none;
    /* Disable tap highlight */
    -webkit-tap-highlight-color: transparent;
}

/* Chat Container - Full width responsive */
.chat-container {
    display: flex;
    flex-direction: column;
    /* Use fixed positioning to fill entire viewport */
    position: fixed;
    inset: 0;
    background: var(--imessage-bg);
}

/* Header - compact iMessage style */
.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    padding-top: calc(8px + env(safe-area-inset-top));
    background: var(--imessage-input-bg);
    border-bottom: 0.5px solid var(--imessage-border);
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 6px;
}

.logo-icon {
    font-size: 20px;
    line-height: 1;
}

.logo-text {
    font-size: 15px;
    font-weight: 600;
    color: var(--imessage-text-dark);
}

.status {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--imessage-time);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--warning-color);
    transition: background 0.3s;
}

.status.connected .status-dot {
    background: var(--success-color);
}

.status.error .status-dot {
    background: var(--error-color);
}

/* Messages Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 8px 12px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    background: var(--imessage-bg);
}

/* Message Bubbles - iMessage style */
.message {
    display: flex;
    flex-direction: column;
    max-width: min(70%, 600px);
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

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

.message-content {
    padding: 8px 12px;
    border-radius: 18px;
    word-wrap: break-word;
    white-space: pre-wrap;
    font-size: 16px;
    line-height: 1.4;
}

/* User messages - blue bubble */
.message.user .message-content {
    background: var(--imessage-blue);
    color: var(--imessage-text-light);
    border-bottom-right-radius: 4px;
}

/* Assistant messages - gray bubble */
.message.assistant .message-content {
    background: var(--imessage-gray);
    color: var(--imessage-text-dark);
    border-bottom-left-radius: 4px;
}

/* System messages - subtle gray bubble */
.message.system {
    align-self: flex-start;
}

.message.system .message-content {
    background: var(--imessage-gray);
    color: var(--imessage-time);
    font-size: 14px;
    border-bottom-left-radius: 4px;
}

.message-time {
    font-size: 11px;
    color: var(--imessage-time);
    margin-top: 2px;
    padding: 0 8px;
}

.message.user .message-time {
    text-align: right;
}

/* Typing Indicator - iMessage dots */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 10px 14px;
    background: var(--imessage-gray);
    border-radius: 18px;
    border-bottom-left-radius: 4px;
    width: fit-content;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: #8E8E93;
    border-radius: 50%;
    animation: typingBounce 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.15s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.3s;
}

@keyframes typingBounce {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.4;
    }
    30% {
        transform: translateY(-4px);
        opacity: 1;
    }
}

/* Input Area - iMessage style */
.chat-input-area {
    padding: 6px 8px;
    padding-bottom: calc(6px + env(safe-area-inset-bottom));
    background: var(--imessage-input-bg);
    border-top: 0.5px solid var(--imessage-border);
    flex-shrink: 0;
}

.input-container {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--imessage-bg);
    border: 1px solid var(--imessage-border);
    border-radius: 18px;
    padding: 2px 2px 2px 12px;
    max-width: 800px;
    margin: 0 auto;
}

.send-btn {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border: none;
    background: var(--imessage-blue);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: white;
    padding: 0;
    transition: opacity 0.2s;
}

.send-btn svg {
    width: 16px;
    height: 16px;
}

.send-btn:hover {
    opacity: 0.85;
}

.send-btn:disabled {
    background: var(--imessage-border);
    cursor: not-allowed;
}

#message-input {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--imessage-text-dark);
    /* 16px minimum prevents iOS zoom on focus */
    font-size: 16px;
    resize: none;
    max-height: 100px;
    line-height: 1.3;
    padding: 4px 0;
    font-family: inherit;
    /* Prevent zoom on double-tap */
    touch-action: manipulation;
}

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

#message-input::placeholder {
    color: var(--imessage-time);
}

/* System Messages */
.system-message {
    text-align: center;
    padding: 8px 16px;
    font-size: 12px;
    color: var(--imessage-time);
}

/* Allow text selection in messages (for copying) */
.message-content {
    -webkit-user-select: text;
    user-select: text;
}

/* Smooth scrolling for messages */
.chat-messages {
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
}

/* Prevent pull-to-refresh in standalone mode */
@media all and (display-mode: standalone) {
    body {
        overscroll-behavior-y: contain;
    }
}

/* Dark mode - iMessage dark style */
@media (prefers-color-scheme: dark) {
    :root {
        --imessage-bg: #1C1C1E;
        --imessage-gray: #3A3A3C;
        --imessage-text-dark: #ffffff;
        --imessage-input-bg: #000000;
        --imessage-border: #38383A;
        --imessage-time: #8E8E93;
    }

    .message.assistant .message-content {
        color: var(--imessage-text-light);
    }

    .input-container {
        background: #2C2C2E;
        border-color: #48484A;
    }
}