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

:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --bg-dark: #0f0f1e;
    --bg-light: #1a1a2e;
    --bg-chat: #16213e;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b8;
    --bot-message-bg: #2d3561;
    --user-message-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --input-bg: #1e2749;
    --border-color: #2d3561;
    --success-color: #4ade80;
    --error-color: #f87171;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.1) 0%, transparent 50%);
}

.chat-container {
    width: 100%;
    max-width: 600px;
    height: 700px;
    background: var(--bg-light);
    border-radius: 24px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.05);
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chat-header {
    background: var(--primary-gradient);
    padding: 24px;
    padding-top: calc(24px + env(safe-area-inset-top));
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 100%);
    pointer-events: none;
}

.header-content {
    display: flex;
    align-items: center;
    gap: 16px;
    position: relative;
}

.restaurant-avatar {
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.header-text h1 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 4px;
}

.status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.9);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.6;
        transform: scale(0.95);
    }
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    background: var(--bg-chat);
    scroll-behavior: smooth;
    min-height: 0;
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

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

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.message {
    margin-bottom: 20px;
    animation: messageSlide 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes messageSlide {
    from {
        opacity: 0;
        transform: translateY(15px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-content {
    max-width: 80%;
    padding: 14px 18px;
    border-radius: 18px;
    line-height: 1.5;
    font-size: 15px;
    word-wrap: break-word;
}

.message.bot .message-content {
    background: var(--bot-message-bg);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.message.user .message-content {
    background: var(--user-message-bg);
    color: white;
    margin-left: auto;
    border-bottom-right-radius: 4px;
    box-shadow: 0 2px 12px rgba(102, 126, 234, 0.3);
}

.typing-indicator {
    display: flex;
    gap: 6px;
    padding: 14px 18px;
    background: var(--bot-message-bg);
    border-radius: 18px;
    border-bottom-left-radius: 4px;
    max-width: fit-content;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--text-secondary);
    border-radius: 50%;
    animation: typingBounce 1.4s infinite;
}

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

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

@keyframes typingBounce {

    0%,
    60%,
    100% {
        transform: translateY(0);
        opacity: 0.7;
    }

    30% {
        transform: translateY(-8px);
        opacity: 1;
    }
}

.chat-input-area {
    padding: 20px 24px;
    background: var(--bg-light);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

.privacy-footer {
    flex-shrink: 0;
    padding-bottom: calc(10px + env(safe-area-inset-bottom));
    background: var(--bg-light);
    width: 100%;
}

.input-wrapper {
    display: flex;
    gap: 12px;
    align-items: center;
}

.chat-input {
    flex: 1;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 14px 18px;
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    outline: none;
    transition: all 0.3s ease;
}

.chat-input:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

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

.send-button {
    width: 48px;
    height: 48px;
    background: var(--primary-gradient);
    border: none;
    border-radius: 14px;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.send-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
}

.send-button:active {
    transform: translateY(0);
}

.send-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Quick reply buttons */
.quick-replies {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.quick-reply-btn {
    padding: 10px 16px;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.quick-reply-btn:hover {
    background: var(--bot-message-bg);
    border-color: #667eea;
    transform: translateY(-1px);
}

/* Success message */
.success-message {
    text-align: center;
    padding: 32px 24px;
}

.success-icon {
    font-size: 64px;
    margin-bottom: 16px;
    animation: successPop 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes successPop {
    0% {
        transform: scale(0);
        opacity: 0;
    }

    50% {
        transform: scale(1.1);
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.success-message h3 {
    font-size: 22px;
    margin-bottom: 8px;
    color: var(--success-color);
}

.success-message p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

/* Responsive design */
@media (max-width: 640px) {

    html,
    body {
        height: 100dvh;
        min-height: 100dvh;
        width: 100%;
        overflow: hidden;
        padding: 0;
        align-items: flex-start;
    }

    .chat-container {
        height: 100%;
        width: 100%;
        max-width: 100%;
        border-radius: 0;
    }

    .chat-header {
        padding: 20px;
    }

    .restaurant-avatar {
        width: 48px;
        height: 48px;
        font-size: 24px;
    }

    .header-text h1 {
        font-size: 18px;
    }

    .message-content {
        max-width: 85%;
        font-size: 14px;
    }
}