:root {
    /* Professional Color Palette */
    --primary: #1e3a5f;
    --primary-light: #2a4a73;
    --secondary: #ffffff;
    --accent: #0d9488;
    --accent-hover: #0f766e;
    --text-dark: #1f2937;
    --text-muted: #6b7280;
    --bg-light: #f8fafc;
    --bg-muted: #f1f5f9;
    --border: #e2e8f0;
    --shadow: rgba(30, 58, 95, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-light);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 100%;
    max-width: 600px;
    height: 100vh;
    max-height: 800px;
    background: var(--secondary);
    border-radius: 12px;
    box-shadow: 0 4px 24px var(--shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.screen {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.hidden {
    display: none !important;
}

/* Access Screen */
#access-screen {
    justify-content: center;
    align-items: center;
    padding: 2rem;
    text-align: center;
}

#access-screen h1 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

#access-screen p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.access-form {
    display: flex;
    gap: 0.5rem;
    width: 100%;
    max-width: 300px;
}

.access-form input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
}

.access-form input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(13, 148, 136, 0.1);
}

.access-form button {
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: var(--secondary);
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.access-form button:hover {
    background: var(--accent-hover);
}

.error {
    color: #dc3545;
    margin-top: 1rem;
}

/* Professional Header */
#profile-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--secondary);
}

.profile-photo-container {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
}

.profile-photo {
    width: 56px;
    height: 56px;
    max-width: 56px;
    max-height: 56px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.3);
    display: block;
}

.profile-photo-placeholder {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--secondary);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

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

.profile-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.125rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.profile-title {
    font-size: 0.85rem;
    opacity: 0.9;
    margin-bottom: 0.125rem;
}

.profile-company {
    font-size: 0.8rem;
    opacity: 0.75;
}

.profile-links {
    flex-shrink: 0;
    display: flex;
    gap: 0.5rem;
}

.profile-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    color: var(--secondary);
    transition: background-color 0.2s ease;
}

.profile-link:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* CTA Bar */
#cta-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 0.625rem 1rem;
    background: var(--accent);
    color: var(--secondary);
}

.cta-label {
    font-size: 0.85rem;
    font-weight: 500;
}

.cta-buttons {
    display: flex;
    gap: 0.5rem;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    background: var(--secondary);
    color: var(--accent);
    border-radius: 4px;
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.cta-button:hover {
    background: var(--primary);
    color: var(--secondary);
}

.cta-button svg {
    flex-shrink: 0;
}

/* Chat Screen */
#chat-screen {
    height: 100%;
}

#chat-header {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-muted);
}

#chat-header p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

#chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.message {
    max-width: 80%;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    line-height: 1.4;
}

.message.user {
    align-self: flex-end;
    background: var(--primary);
    color: var(--secondary);
    border-bottom-right-radius: 4px;
}

.message.assistant {
    align-self: flex-start;
    background: var(--bg-muted);
    color: var(--text-dark);
    border-bottom-left-radius: 4px;
}

#chat-input-container {
    display: flex;
    gap: 0.5rem;
    padding: 1rem;
    border-top: 1px solid var(--border);
    background: var(--bg-muted);
}

#chat-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 1rem;
    background: var(--secondary);
}

#chat-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(13, 148, 136, 0.1);
}

#chat-send {
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: var(--secondary);
    border: none;
    border-radius: 20px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

#chat-send:hover {
    background: var(--accent-hover);
}

#chat-send:disabled {
    background: var(--border);
    color: var(--text-muted);
    cursor: not-allowed;
}

/* Welcome Container & Quick Reply Chips */
#welcome-container {
    max-width: 90%;
}

.welcome-text {
    margin-bottom: 0.75rem;
    line-height: 1.5;
}

.quick-replies {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.quick-reply-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 0.875rem;
    background: var(--secondary);
    color: var(--primary);
    border: 1px solid var(--border);
    border-radius: 16px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.quick-reply-chip:hover {
    background: var(--primary);
    color: var(--secondary);
    border-color: var(--primary);
}

.quick-reply-chip:active {
    transform: scale(0.98);
}

/* Follow-up Suggestions */
.follow-up-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
}

.follow-up-label {
    width: 100%;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.follow-up-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.375rem 0.75rem;
    background: var(--secondary);
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 14px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.follow-up-chip:hover {
    background: var(--accent);
    color: var(--secondary);
}

.follow-up-chip:active {
    transform: scale(0.98);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0.75rem 1rem;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: #999;
    border-radius: 50%;
    animation: typing-bounce 1.4s infinite ease-in-out both;
}

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

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

.typing-indicator span:nth-child(3) {
    animation-delay: 0s;
}

@keyframes typing-bounce {
    0%, 80%, 100% {
        transform: scale(0.6);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Streaming Cursor */
.message.assistant .markdown-content.streaming {
    white-space: pre-wrap;
}

.message.assistant .markdown-content.streaming::after {
    content: '|';
    animation: blink 0.7s infinite;
    color: var(--accent);
    font-weight: bold;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* Markdown Content Styling */
.message.assistant .markdown-content {
    line-height: 1.6;
}

.message.assistant .markdown-content h1,
.message.assistant .markdown-content h2,
.message.assistant .markdown-content h3 {
    margin-top: 0.75rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #1f2937;
}

.message.assistant .markdown-content h1:first-child,
.message.assistant .markdown-content h2:first-child,
.message.assistant .markdown-content h3:first-child {
    margin-top: 0;
}

.message.assistant .markdown-content h1 {
    font-size: 1.1rem;
}

.message.assistant .markdown-content h2 {
    font-size: 1rem;
}

.message.assistant .markdown-content h3 {
    font-size: 0.95rem;
}

.message.assistant .markdown-content p {
    margin-bottom: 0.5rem;
}

.message.assistant .markdown-content p:last-child {
    margin-bottom: 0;
}

.message.assistant .markdown-content ul,
.message.assistant .markdown-content ol {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.message.assistant .markdown-content li {
    margin-bottom: 0.25rem;
}

.message.assistant .markdown-content strong {
    font-weight: 600;
    color: #1f2937;
}

.message.assistant .markdown-content em {
    font-style: italic;
}

.message.assistant .markdown-content a {
    color: #0d9488;
    text-decoration: none;
}

.message.assistant .markdown-content a:hover {
    text-decoration: underline;
}

.message.assistant .markdown-content code {
    background: #e5e7eb;
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.875rem;
}

.message.assistant .markdown-content blockquote {
    border-left: 3px solid #0d9488;
    padding-left: 0.75rem;
    margin: 0.5rem 0;
    color: #4b5563;
    font-style: italic;
}

.message.assistant .markdown-content hr {
    border: none;
    border-top: 1px solid #d1d5db;
    margin: 0.75rem 0;
}

/* Expandable Cards */
.expandable-card {
    background: var(--secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin: 0.5rem 0;
    overflow: hidden;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.card-header:hover {
    background: var(--bg-muted);
}

.card-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.card-title-section {
    flex: 1;
    min-width: 0;
}

.card-title {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.95rem;
}

.card-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.125rem;
}

.card-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: right;
    flex-shrink: 0;
}

.card-toggle {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.expandable-card.expanded .card-toggle {
    transform: rotate(180deg);
}

.card-content {
    display: none;
    padding: 0 1rem 0.75rem 1rem;
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
    line-height: 1.5;
}

.expandable-card.expanded .card-content {
    display: block;
}

.card-content ul {
    margin: 0.5rem 0;
    padding-left: 1.25rem;
}

.card-content li {
    margin-bottom: 0.25rem;
}

/* Skill Tags */
.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin-top: 0.5rem;
}

.skill-tag {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    background: var(--bg-muted);
    color: var(--text-dark);
    border-radius: 12px;
    font-size: 0.8rem;
}

.skill-tag.primary {
    background: var(--primary);
    color: var(--secondary);
}

.skill-tag.accent {
    background: var(--accent);
    color: var(--secondary);
}

/* Link Buttons & Action Cards */
.link-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--secondary);
    color: var(--primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    margin: 0.25rem 0.25rem 0.25rem 0;
}

.link-button:hover {
    background: var(--primary);
    color: var(--secondary);
    border-color: var(--primary);
    text-decoration: none;
}

.link-button .link-icon {
    font-size: 1rem;
}

/* Action Buttons Container */
.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.action-button {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    background: var(--accent);
    color: var(--secondary);
    border: none;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.action-button:hover {
    background: var(--accent-hover);
    text-decoration: none;
}

.action-button.secondary {
    background: var(--secondary);
    color: var(--primary);
    border: 1px solid var(--border);
}

.action-button.secondary:hover {
    background: var(--bg-muted);
}

/* Contact Card */
.contact-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-muted);
    border-radius: 8px;
    margin: 0.75rem 0;
}

.contact-card .contact-icon {
    font-size: 2rem;
}

.contact-card .contact-info {
    flex: 1;
}

.contact-card .contact-name {
    font-weight: 600;
    color: var(--text-dark);
}

.contact-card .contact-detail {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.contact-card .contact-actions {
    display: flex;
    gap: 0.5rem;
}

/* Error Message */
.error-message {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 8px;
    margin: 0.5rem 0;
}

.error-message .error-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.error-message .error-content {
    flex: 1;
}

.error-message .error-title {
    font-weight: 600;
    color: #991b1b;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.error-message .error-text {
    color: #b91c1c;
    font-size: 0.85rem;
    line-height: 1.4;
}

.error-message .retry-button {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    background: #dc2626;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-top: 0.5rem;
}

.error-message .retry-button:hover {
    background: #b91c1c;
}

/* About Modal */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal.hidden {
    display: none !important;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    background: var(--secondary);
    border-radius: 12px;
    padding: 1.5rem;
    overflow-y: auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    z-index: 1;
}

.modal-close {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: var(--bg-muted);
    color: var(--text-dark);
}

.modal-content h2 {
    margin: 0 0 1rem 0;
    font-size: 1.25rem;
    color: var(--primary);
}

.modal-content h3 {
    margin: 1.25rem 0 0.5rem 0;
    font-size: 1rem;
    color: var(--text-dark);
}

.modal-content h3:first-of-type {
    margin-top: 0.5rem;
}

.modal-content p {
    margin: 0 0 0.75rem 0;
    line-height: 1.6;
    color: var(--text-dark);
    font-size: 0.9rem;
}

.tech-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.tech-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--primary);
    color: var(--secondary);
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 500;
}

.modal-footer {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.modal-note {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
    margin: 0;
}

.modal-note a {
    color: var(--accent);
    text-decoration: none;
}

.modal-note a:hover {
    text-decoration: underline;
}

/* Profile link button style (for info icon) */
button.profile-link {
    border: none;
    cursor: pointer;
}

/* Mobile responsive */
@media (max-width: 640px) {
    .container {
        max-height: none;
        border-radius: 0;
    }

    #profile-header {
        padding: 1rem;
        gap: 0.75rem;
    }

    .profile-photo-placeholder {
        width: 48px;
        height: 48px;
        font-size: 1rem;
    }

    .profile-name {
        font-size: 1rem;
    }

    .profile-title {
        font-size: 0.8rem;
    }

    .profile-company {
        font-size: 0.75rem;
    }
}