/* style_materi.css */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&family=Rajdhani:wght@500;700&display=swap');

:root {
    --bg-dark: #0F0F23;
    --card-bg: rgba(27, 27, 58, 0.6);
    --primary-accent: #4D76FD;
    --secondary-accent: #00F5D4;
    --text-color: #EAEAEA;
    --border-color: rgba(77, 118, 253, 0.3);
    --font-heading: 'Rajdhani', sans-serif;
    --font-body: 'Roboto', sans-serif;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-dark);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    background-image: linear-gradient(45deg, var(--bg-dark) 0%, #1f1f3d 100%);
}

.quiz-container { 
    background-color: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 800px;
    padding: 30px 40px;
}

h1 {
    font-family: var(--font-heading);
    color: var(--secondary-accent);
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 15px;
}

.materi-nav {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 30px;
}

.nav-link-btn {
    background: linear-gradient(135deg, var(--primary-accent), var(--secondary-accent));
    color: white;
    text-decoration: none;
    padding: 0.7rem 1.2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-align: center;
    min-width: 120px;
}

.nav-link-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(77, 118, 253, 0.4);
    text-decoration: none;
    color: white;
}

.nav-btn {
    background-color: var(--primary-accent);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 12px 25px;
    font-size: 1rem;
    font-weight: 700;
    font-family: var(--font-heading);
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

.nav-btn:hover {
    background-color: #3a65e8;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(77, 118, 253, 0.4);
}

/* Gaya khusus Halaman Materi */
.materi-title { font-family: var(--font-heading); color: var(--secondary-accent); text-align: center; font-size: 2.5rem; margin-bottom: 30px; border-bottom: 2px solid var(--border-color); padding-bottom: 15px; }
.materi-section { margin-bottom: 30px; }
.materi-section h3 { font-family: var(--font-heading); font-size: 1.5rem; color: var(--primary-accent); margin-bottom: 15px; }
.materi-section h4 { font-family: var(--font-heading); font-size: 1.2rem; color: var(--secondary-accent); margin-top: 20px; }
.materi-section p, .materi-section li { line-height: 1.7; font-size: 1rem; }
.materi-section ul { padding-left: 20px; }
.contoh-soal { border: 1px solid var(--border-color); border-radius: 10px; padding: 20px; margin-top: 20px; background-color: rgba(0,0,0,0.15); }
.pembahasan { margin-top: 15px; padding-top: 15px; border-top: 1px dashed var(--border-color); }
.pembahasan p { font-family: monospace; background-color: rgba(0,0,0,0.2); padding: 10px; border-radius: 5px; }

/* Chatbot GACORRR */
.chatbot-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

.chatbot-section h2 {
    color: var(--secondary-accent);
    text-align: center;
    margin-bottom: 1rem;
}

.chatbot-section p {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-color);
}

.chat-container {
    background-color: rgba(15, 15, 35, 0.8);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.chat-messages {
    height: 300px;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.user-message, .bot-message {
    display: flex;
    max-width: 80%;
}

.user-message {
    align-self: flex-end;
}

.bot-message {
    align-self: flex-start;
}

.message-content {
    padding: 0.8rem 1rem;
    border-radius: 18px;
    word-wrap: break-word;
}

.user-message .message-content {
    background-color: var(--primary-accent);
    color: white;
    border-bottom-right-radius: 4px;
}

.bot-message .message-content {
    background-color: rgba(77, 118, 253, 0.2);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 4px;
    line-height: 1.6;
}


.message-content .formula {
    font-family: 'Courier New', monospace;
    background-color: rgba(0, 245, 212, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--secondary-accent);
    font-weight: bold;
    font-size: 0.95em;
}

.message-content strong {
    color: var(--secondary-accent);
    font-weight: 600;
}


.message-content sub {
    font-size: 0.75em;
    line-height: 0;
    position: relative;
    vertical-align: sub;
}

.message-content sup {
    font-size: 0.75em;
    line-height: 0;
    position: relative;
    vertical-align: super;
}

.message-content .formula sub,
.message-content .formula sup {
    color: inherit;
    font-weight: inherit;
}

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

.message-content li {
    margin: 0.3rem 0;
}

.message-content p {
    margin: 0.5rem 0;
}

.chat-input-container {
    display: flex;
    padding: 1rem;
    background-color: rgba(27, 27, 58, 0.8);
    gap: 0.5rem;
}

#chatInput {
    flex: 1;
    padding: 0.8rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background-color: rgba(15, 15, 35, 0.9);
    color: var(--text-color);
    font-size: 0.9rem;
}

#chatInput:focus {
    outline: none;
    border-color: var(--primary-accent);
}

#sendButton {
    padding: 0.8rem 1.5rem;
    border-radius: 20px;
    border: none;
    background-color: var(--primary-accent);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

#sendButton:hover {
    background-color: var(--secondary-accent);
    transform: translateY(-1px);
}

#sendButton:disabled {
    background-color: #666;
    cursor: not-allowed;
    transform: none;
}

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-color);
    font-style: italic;
}

.typing-dots {
    display: inline-flex;
    gap: 2px;
}

.typing-dots span {
    width: 4px;
    height: 4px;
    background-color: var(--primary-accent);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out;
}

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

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

@keyframes typing {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}