/* Design System */
:root {
    --primary-color: #C85A3A;
    --primary-hover: #B04830;
    --primary-light: #E8725A;
    --background: #FFF9F7;
    --surface: #FFFFFF;
    --text-primary: #2C2C2C;
    --text-secondary: #666666;
    --border-color: #E5E5E5;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(200, 90, 58, 0.15);
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 1200px;
    margin: 0 auto;
}

/* Status Banner */
.status-banner {
    background: linear-gradient(135deg, #f44336 0%, #d32f2f 100%);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transition: all 0.3s ease;
}

.status-banner.hidden {
    display: none;
}

.status-content {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.95rem;
    font-weight: 500;
}

.status-icon {
    font-size: 1.2rem;
}

.status-message {
    flex: 1;
}

/* Header */
.app-header {
    background: var(--surface);
    border-bottom: 2px solid var(--primary-color);
    padding: var(--spacing-lg) var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.header-content {
    max-width: 800px;
    margin: 0 auto;
}

.app-title {
    font-family: 'Outfit', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.app-subtitle {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Chat Container */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Messages Container */
.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg) 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.messages-container::-webkit-scrollbar {
    width: 8px;
}

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

.messages-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.messages-container::-webkit-scrollbar-thumb:hover {
    background: #CCCCCC;
}

/* Welcome Message */
.welcome-message {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-lg);
}

.welcome-message h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.welcome-message p {
    font-size: 1rem;
    opacity: 0.95;
    line-height: 1.5;
}

/* Message Bubbles */
.message {
    display: flex;
    margin-bottom: var(--spacing-md);
    animation: slideIn 0.3s ease-out;
}

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

.message.user {
    justify-content: flex-start;
}

.message.assistant {
    justify-content: flex-end;
}

.message-bubble {
    max-width: 75%;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    word-wrap: break-word;
    box-shadow: var(--shadow-sm);
}

.message.user .message-bubble {
    background: var(--surface);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
}

.message.assistant .message-bubble {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    border-bottom-right-radius: 4px;
}

.message-content {
    font-size: 0.95rem;
    line-height: 1.5;
}

.message-time {
    font-size: 0.75rem;
    opacity: 0.6;
    margin-top: var(--spacing-xs);
}

/* Input Container */
.input-container {
    background: var(--surface);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.message-form {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-end;
}

.message-input {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: 'Poppins', sans-serif;
    font-size: 0.95rem;
    resize: none;
    max-height: 120px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.message-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(200, 90, 58, 0.1);
}

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

.send-button {
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease, transform 0.1s ease;
    min-width: 48px;
    min-height: 48px;
}

.send-button:hover {
    background: var(--primary-hover);
}

.send-button:active {
    transform: scale(0.95);
}

.send-button:disabled {
    background: var(--border-color);
    cursor: not-allowed;
    opacity: 0.5;
}

.send-button svg {
    width: 20px;
    height: 20px;
}

/* Loading Indicator */
.loading-indicator {
    position: fixed;
    bottom: 120px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--surface);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.loading-dots {
    display: flex;
    gap: 6px;
}

.loading-dots span {
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
}

.loading-dots span:nth-child(1) {
    animation-delay: -0.32s;
}

.loading-dots span:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-header {
        padding: var(--spacing-md) var(--spacing-lg);
    }

    .app-title {
        font-size: 1.5rem;
    }

    .app-subtitle {
        font-size: 0.85rem;
    }

    .chat-container {
        padding: 0 var(--spacing-sm);
    }

    .message-bubble {
        max-width: 85%;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .welcome-message {
        padding: var(--spacing-lg);
    }

    .welcome-message h2 {
        font-size: 1.5rem;
    }

    .input-container {
        padding: var(--spacing-md);
    }

    .message-input {
        font-size: 16px; /* Prevents zoom on iOS */
    }
}

@media (max-width: 480px) {
    .app-title {
        font-size: 1.25rem;
    }

    .message-bubble {
        max-width: 90%;
    }
}