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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --border-color: #334155;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

.card h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.hidden {
    display: none !important;
}

.input-group {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

input[type="url"],
textarea {
    width: 100%;
    padding: 14px 18px;
    background: #0f172a;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

input[type="url"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

textarea {
    min-height: 200px;
    resize: vertical;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

.btn {
    padding: 14px 28px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(99, 102, 241, 0.4);
}

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

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.status-message {
    padding: 12px 18px;
    border-radius: 8px;
    margin-top: 15px;
    font-size: 0.95rem;
}

.status-message.success {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.status-message.error {
    background: rgba(239, 68, 68, 0.2);
    color: var(--error-color);
    border: 1px solid var(--error-color);
}

.status-message.info {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    padding: 12px 24px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
    font-family: inherit;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

.description {
    color: var(--text-secondary);
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.results-box {
    margin-top: 25px;
    padding-top: 25px;
    border-top: 2px solid var(--border-color);
}

.results-box h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
}

footer {
    margin-top: 60px;
    padding: 40px 20px;
    text-align: center;
}

.donation-section {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.donation-section h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.donation-section p {
    color: var(--text-secondary);
    margin-bottom: 25px;
    font-size: 1.1rem;
}

.donation-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.btn-donate {
    background: linear-gradient(135deg, var(--secondary-color), #7c3aed);
    color: white;
    text-decoration: none;
    display: inline-block;
}

.btn-donate:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(139, 92, 246, 0.4);
}

.crypto-info {
    margin-top: 25px;
    padding: 20px;
    background: #0f172a;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.crypto-info p {
    margin-bottom: 10px;
    font-size: 0.9rem;
    word-break: break-all;
}

.crypto-info span {
    color: var(--primary-color);
    font-family: 'Courier New', monospace;
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.9rem;
    background: var(--primary-color);
    color: white;
    margin-top: 10px;
}

.founder-section {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    text-align: left;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.founder-section h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: var(--text-primary);
    text-align: center;
}

.founder-title {
    text-align: center;
    color: var(--primary-color);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 30px;
}

.founder-message {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1rem;
}

.founder-message p {
    margin-bottom: 20px;
    text-align: left;
}

.founder-message p:first-child {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.founder-signature {
    text-align: right !important;
    font-style: italic;
    color: var(--text-primary);
    margin-top: 30px !important;
    margin-bottom: 30px !important;
}

.btn-coffee {
    margin-top: 20px;
    display: inline-block;
    text-align: center;
    width: 100%;
    max-width: 300px;
}

.youtube-section {
    margin-top: 30px;
}

.checkbox-group {
    margin: 20px 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.checkbox-label span {
    font-size: 0.95rem;
}

.youtube-results {
    margin-top: 25px;
}

.youtube-results .tabs {
    margin-bottom: 20px;
}

.youtube-results textarea {
    min-height: 300px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* AI Chat Section Styles */
.ai-chat-section {
    margin-top: 30px;
}

.chat-container {
    margin-top: 20px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background: #0f172a;
    overflow: hidden;
}

.chat-messages {
    height: 400px;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    background: linear-gradient(to bottom, #0f172a, #1e293b);
}

.chat-message {
    display: flex;
    flex-direction: column;
    gap: 5px;
    animation: fadeIn 0.3s ease-in;
}

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

.chat-message.user {
    align-items: flex-end;
}

.chat-message.assistant {
    align-items: flex-start;
}

.message-bubble {
    max-width: 75%;
    padding: 12px 16px;
    border-radius: 12px;
    word-wrap: break-word;
    line-height: 1.5;
}

.chat-message.user .message-bubble {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-bottom-right-radius: 4px;
}

.chat-message.assistant .message-bubble {
    background: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 4px;
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
    padding: 0 8px;
}

.chat-message.typing .message-bubble {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 12px 20px;
}

.typing-indicator {
    display: flex;
    gap: 5px;
    align-items: center;
}

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

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

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

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.5;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

.chat-input-container {
    display: flex;
    gap: 10px;
    padding: 15px;
    background: var(--card-bg);
    border-top: 2px solid var(--border-color);
}

.chat-input {
    flex: 1;
    padding: 12px 16px;
    background: #0f172a;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.chat-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.chat-send-btn {
    padding: 12px 24px;
    white-space: nowrap;
}

.chat-send-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Scrollbar styling for chat messages */
.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: #0f172a;
}

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

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
    margin-right: 10px;
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .input-group {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .donation-buttons {
        flex-direction: column;
    }

    .tabs {
        flex-wrap: wrap;
    }
}