/**
 * Utrition Plugin Styles - ChatGPT-Style Interface
 * Beautiful conversational UI for nutrition intake
 */

:root {
    --utrition-primary: #64748b;
    --utrition-primary-dark: #475569;
    --utrition-success: #10b981;
    --utrition-error: #ef4444;
    --utrition-text: #1f2937;
    --utrition-text-light: #6b7280;
    --utrition-border: #e2e8f0;
    --utrition-bg: #f8fafc;
    --utrition-white: #ffffff;
    --utrition-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --utrition-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Container - Full Page */
.utrition-container {
    width: 100%;
    min-height: 100vh;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--utrition-bg);
}

/* Card - Full Page */
.utrition-card {
    background: var(--utrition-white);
    border-radius: 0;
    box-shadow: none;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header - Minimal modern with navigation */
.utrition-header {
    background: linear-gradient(135deg, var(--utrition-primary) 0%, var(--utrition-primary-dark) 100%);
    color: var(--utrition-white);
    padding: 1rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

.utrition-header h2 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.utrition-header h2 a {
    color: var(--utrition-white);
    text-decoration: none;
    background: none;
    -webkit-background-clip: unset;
    -webkit-text-fill-color: unset;
    background-clip: unset;
    transition: all 0.2s ease;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
}

.utrition-header h2 a:hover {
    background: rgba(255, 255, 255, 0.1);
    text-decoration: none;
    color: var(--utrition-white);
    transform: translateY(-1px);
}

.header-nav {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    position: absolute;
    right: 0;
}

.nav-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--utrition-white);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.2s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.nav-btn svg {
    opacity: 0.9;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
    text-decoration: none;
    color: var(--utrition-white);
}

.nav-btn-login {
    background: rgba(255, 255, 255, 0.15);
}

.nav-btn-cart {
    background: rgba(255, 255, 255, 0.1);
}

/* Chat Container - Static Full Page */
.chat-container {
    display: flex;
    flex-direction: column;
    flex: 1;
    height: calc(100vh - 120px);
    position: relative;
}

/* Welcome Screen */
.welcome-screen {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    flex: 1;
    padding: 2rem;
    text-align: center;
    position: relative;
}

.welcome-content {
    margin-bottom: 3rem;
}

.welcome-content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--utrition-text);
    margin: 0 0 1rem 0;
    line-height: 1.2;
}

.welcome-content p {
    font-size: 1.125rem;
    color: var(--utrition-text-light);
    margin: 0 0 2rem 0;
    line-height: 1.5;
}

.btn-start {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--utrition-primary) 0%, var(--utrition-primary-dark) 100%);
    color: var(--utrition-white);
    border: none;
    font-size: 1.125rem;
    font-weight: 700;
    border-radius: 16px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 12px rgba(100, 116, 139, 0.4);
    white-space: nowrap;
    letter-spacing: 0.01em;
}

.btn-start:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(100, 116, 139, 0.5);
}

.btn-start:active {
    transform: translateY(0);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
    box-sizing: border-box;
}

/* Chat Messages */
.chat-message {
    display: flex;
    animation: fadeIn 0.3s ease-in;
}

.chat-message-bot {
    justify-content: flex-start;
}

.chat-message-user {
    justify-content: flex-end;
}

.chat-message-error {
    justify-content: center;
}

.chat-bubble {
    max-width: 90%;
    padding: 0.75rem 1rem;
    border-radius: 18px;
    font-size: 0.9375rem;
    line-height: 1.5;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.chat-message-bot .chat-bubble {
    background: #f7f7f8;
    color: var(--utrition-text);
    border: 1px solid #e5e7eb;
    border-bottom-left-radius: 4px;
}

.chat-message-user .chat-bubble {
    background: var(--utrition-primary);
    color: var(--utrition-white);
    border-bottom-right-radius: 4px;
    box-shadow: 0 2px 8px rgba(100, 116, 139, 0.3);
}

.chat-message-error .chat-bubble {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
    font-size: 0.875rem;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

/* Chat Input Area - Static at Bottom */
.chat-input-area {
    display: flex;
    gap: 1rem;
    padding: 1rem 0.5rem;
    border-top: 1px solid var(--utrition-border);
    background: var(--utrition-white);
    width: 100%;
    box-sizing: border-box;
}

/* Welcome input styling */
.chat-input-area.welcome-input {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    border-top: none;
    background: transparent;
    padding: 0;
    max-width: 600px;
    width: calc(100% - 4rem);
    margin: 0;
}

.chat-input-area.welcome-input #chatInput {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

#chatInput {
    flex: 1;
    padding: 1rem 1.5rem;
    border: 2px solid var(--utrition-border);
    border-radius: 16px;
    font-size: 1.125rem;
    color: var(--utrition-text);
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
    background: var(--utrition-white);
}

#chatInput:focus {
    outline: none;
    border-color: var(--utrition-primary);
    box-shadow: 0 0 0 4px rgba(100, 116, 139, 0.1);
}

.btn-send {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--utrition-primary) 0%, var(--utrition-primary-dark) 100%);
    color: var(--utrition-white);
    border: none;
    font-size: 1.125rem;
    font-weight: 700;
    border-radius: 16px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 12px rgba(100, 116, 139, 0.4);
    white-space: nowrap;
    letter-spacing: 0.01em;
}

.btn-send:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(100, 116, 139, 0.5);
}

.btn-send:active:not(:disabled) {
    transform: translateY(0);
}

.btn-send:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Recommendations Section */
.recommendations {
    padding: 2rem;
    animation: fadeIn 0.5s ease-in;
}

.recommendations-header {
    margin-bottom: 1.5rem;
}

.recommendations-header h3 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--utrition-text);
}

.recommendations-content {
    line-height: 1.7;
    color: var(--utrition-text);
}

.recommendations-content p {
    margin: 0 0 1rem 0;
}

.recommendations-content p:last-child {
    margin-bottom: 0;
}

.recommendations-content ul,
.recommendations-content ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.recommendations-content li {
    margin-bottom: 0.5rem;
}

.recommendations-actions {
    margin-top: 2rem;
    text-align: center;
}

.btn-secondary {
    padding: 0.75rem 2rem;
    background: var(--utrition-white);
    color: var(--utrition-primary);
    border: 2px solid var(--utrition-primary);
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}

.btn-secondary:hover {
    background: var(--utrition-primary);
    color: var(--utrition-white);
}

/* Scrollbar Styling */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}

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

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

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--utrition-text-light);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .utrition-container {
        margin: 0;
    }

    .utrition-header {
        padding: 1rem 0.5rem;
    }

    .utrition-header h2 {
        font-size: 1.25rem;
    }

    .header-nav {
        gap: 0.5rem;
    }

    .nav-btn {
        width: 36px;
        height: 36px;
        font-size: 1.1rem;
    }

    .chat-container {
        height: calc(100vh - 80px);
    }

    .welcome-screen {
        padding: 1rem;
    }

    .welcome-content h1 {
        font-size: 2rem;
    }

    .welcome-content p {
        font-size: 1rem;
    }

    .welcome-content {
        margin-bottom: 2rem;
    }

    .btn-start {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }

    .chat-input-area.welcome-input {
        bottom: 1rem;
        width: calc(100% - 2rem);
    }

    .chat-messages {
        padding: 1rem 0.5rem;
        gap: 1rem;
    }

    .chat-bubble {
        max-width: 85%;
        font-size: 0.9375rem;
    }

    .chat-input-area {
        padding: 1rem 0.5rem;
        gap: 0.75rem;
    }

    .chat-input-area.welcome-input {
        padding: 0;
    }

    #chatInput {
        font-size: 16px; /* Prevent zoom on iOS */
        padding: 0.875rem 1.25rem;
    }

    .btn-send {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }

    .recommendations {
        padding: 1.5rem;
    }

    .recommendations-header h3 {
        font-size: 1.25rem;
    }
}

/* Accessibility */
#chatInput:focus-visible,
.btn-send:focus-visible,
.btn-secondary:focus-visible {
    outline: 2px solid var(--utrition-primary);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .utrition-header {
        background: none;
        color: var(--utrition-text);
    }

    .chat-input-area,
    .recommendations-actions {
        display: none;
    }
}