/* style.css
  Desain Ulang Modern dengan Tema Terang/Gelap Otomatis (CSS-Only)
*/

/* 1. Import Font dan Reset Dasar */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

* {
    box-sizing: border-box;
}

/* 2. Variabel CSS (Tema Terang - Default) */
:root {
    --font-sans: 'Inter', sans-serif;
    
    /* Warna Latar Belakang */
    --bg-page: #f9fafb;      /* bg-gray-50 */
    --bg-container: #ffffff; /* bg-white */
    --bg-header: #2563eb;    /* bg-white */
    --bg-chatbox: #f3f4f6;   /* bg-gray-100 */
    --bg-input: #ffffff;     /* bg-white */
    --bg-input-focused: #ffffff;
    --bg-button-hover: #f3f4f6; /* bg-gray-100 */

    /* Warna Teks */
    --text-primary: #111827;   /* text-gray-900 */
    --text-secondary: #6b7280; /* text-gray-500 */
    --text-header-title: #fff;
    --text-header-subtitle: #fff;

    /* Warna Aksen (Biru) */
    --accent-primary: #2563eb; /* text-blue-600 */
    --accent-primary-rgb: 37, 99, 235;
    --accent-primary-hover: #1d4ed8; /* bg-blue-700 */
    --accent-text: #ffffff;

    /* Warna Pesan */
    --msg-bot-bg: #e5e7eb;   /* bg-gray-200 */
    --msg-bot-text: #1f2937; /* text-gray-800 */
    --msg-user-bg: #1f99eb8c;
    --msg-user-text: #ffffff;

    /* Warna Border & Shadow */
    --border-color: #e5e7eb; /* border-gray-200 */
    --shadow-color: rgba(0, 0, 0, 0.08);
    --shadow: 0 4px 15px var(--shadow-color);
    
    /* Warna Tombol Mic */
    --mic-bg: #ef4444; /* bg-red-500 */
    --mic-bg-hover: #dc2626; /* bg-red-600 */
}

/* 3. Variabel CSS (Tema Gelap - Otomatis) */
@media (prefers-color-scheme: dark) {
    :root {
        /* Warna Latar Belakang */
        --bg-page: #111827;      /* bg-gray-900 */
        --bg-container: #1f2937; /* bg-gray-800 */
        --bg-header: #1f2937;    /* bg-gray-800 */
        --bg-chatbox: #374151;   /* bg-gray-700 */
        --bg-input: #4b5563;     /* bg-gray-600 */
        --bg-input-focused: #374151;
        --bg-button-hover: #4b5563; /* bg-gray-600 */

        /* Warna Teks */
        --text-primary: #f9fafb;   /* text-gray-50 */
        --text-secondary: #9ca3af; /* text-gray-400 */
        --text-header-title: #ffffff;
        --text-header-subtitle: #9ca3af;

        /* Warna Aksen (Biru) */
        --accent-primary: #3b82f6; /* text-blue-500 */
        --accent-primary-rgb: 59, 130, 246;
        --accent-primary-hover: #2563eb; /* bg-blue-600 */

        /* Warna Pesan */
        --msg-bot-bg: #4b5563;   /* bg-gray-600 */
        --msg-bot-text: #f3f4f6; /* text-gray-100 */
        --msg-user-bg: var(--accent-primary);
        --msg-user-text: var(--accent-text);

        /* Warna Border & Shadow */
        --border-color: #4b5563; /* border-gray-600 */
        --shadow-color: rgba(0, 0, 0, 0.2);
        --shadow: 0 4px 15px var(--shadow-color);
        
        /* Warna Tombol Mic */
        --mic-bg: #f87171; /* bg-red-400 */
        --mic-bg-hover: #ef4444; /* bg-red-500 */
    }
}


/* 4. Tampilan Dasar (Body & Container) */
body {
    font-family: var(--font-sans);
    background-color: var(--bg-page);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh; /* Gunakan 100vh untuk Penuh */
    margin: 0;
    padding: 16px;
    transition: background-color 0.3s, color 0.3s;
}

.chat-container {
    background-color: var(--bg-container);
    border-radius: 16px; /* Sudut lebih bulat */
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 100%; /* Batas lebar yang lebih baik */
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 90vh; /* Tinggi yang lebih konsisten */
    max-height: 100%; /* Batas tinggi maksimum */
    min-width: 320px;
    transition: background-color 0.3s;
}

/* 5. Header */
.chat-header {
    background-color: var(--bg-header);
    color: var(--text-primary);
    padding: 16px 20px; /* Padding lebih besar */
    position: sticky;
    top: 0;
    z-index: 10;
    border-bottom: 1px solid var(--border-color); /* Border modern */
    transition: background-color 0.3s, border-color 0.3s;
    
    /* Ini dari <style> inline Anda di HTML, diperlukan untuk layout */
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-content {
    display: flex;
    flex-direction: column;
}

.chat-header h3 {
    margin: 0;
    font-size: 1.5rem; /* 20px */
    font-weight: 700;
    color: var(--text-header-title);
    transition: color 0.3s;
}

.chat-header h3 span { /* Tambahan untuk "UM Pontianak" */
    color: var(--accent-primary);
    transition: color 0.3s;
}

.chat-header p {
    margin: 0;
    font-size: 0.875rem; /* 14px */
    color: var(--text-header-subtitle);
    transition: color 0.3s;
}

.chat-header i {
    font-size: 0.875rem; /* 14px */
    color: var(--text-secondary);
    font-style: italic;
    margin-top: 4px;
}

/* PENTING: 
  Mengganti style #refresh-button dari <style> inline di HTML.
  Kita harus menggunakan !important untuk mengalahkan CSS di <head>
*/
#refresh-button {
    color: var(text-header-title) !important;
    background-color: transparent !important;
    border: none;
    border-radius: 50%;
    padding: 6px !important;
    transition: background-color 0.2s, color 0.2s;
    cursor: pointer;
}

#refresh-button:hover {
    background-color: var(--bg-button-hover) !important;
    color: var(--text-primary) !important;
}

#refresh-button svg {
    width: 20px;
    height: 20px;
}


/* 6. Chat Box & Scrollbar */
.chat-box {
    flex-grow: 1;
    padding: 16px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px; /* Jarak antar pesan */
    background-color: var(--bg-chatbox);
    transition: background-color 0.3s;
}

.chat-box::-webkit-scrollbar {
    width: 8px;
}
.chat-box::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 10px;
}
.chat-box::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 10px;
}
.chat-box::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* 7. Pesan */
.message {
    padding: 10px 14px;
    border-radius: 12px; /* Sudut lebih bulat */
    max-width: 80%;
    word-wrap: break-word;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    line-height: 1.5;
    font-size: 0.9rem;
    transition: background-color 0.3s, color 0.3s;
}

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

.bot-message {
    background-color: var(--msg-bot-bg);
    color: var(--msg-bot-text);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
    opacity: 0;
    transform: translateY(8px);
    animation: fadeInUp 0.3s ease-out forwards;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 8. Input Area */
.chat-input {
    display: flex;
    padding: 12px;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-input);
    align-items: flex-end; /* Ratakan ke bawah */
    position: sticky;
    bottom: 0;
    z-index: 10;
    gap: 8px; /* Jarak antar elemen */
    transition: background-color 0.3s, border-color 0.3s;
}

.chat-input textarea {
    flex-grow: 1;
    border: 1px solid var(--border-color);
    border-radius: 12px; /* Sudut bulat */
    font-size: 0.9rem;
    outline: none;
    resize: none;
    min-height: 44px; /* Tinggi minimum baru */
    max-height: 120px;
    padding: 12px 16px; /* Padding lebih nyaman */
    font-family: var(--font-sans);
    background-color: var(--bg-chatbox); /* Sedikit beda */
    color: var(--text-primary);
    transition: border-color 0.3s, box-shadow 0.3s, background-color 0.3s;
}

.chat-input textarea:focus {
    border-color: var(--accent-primary);
    background-color: var(--bg-input-focused);
    box-shadow: 0 0 0 3px rgba(var(--accent-primary-rgb), 0.2);
}

.chat-input button {
    background-color: var(--accent-primary);
    color: var(--accent-text);
    border: none;
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s, box-shadow 0.3s;
    box-shadow: none; /* Hapus shadow lama */
    flex-shrink: 0; /* Cegah tombol menyusut */
    margin: 0; /* Reset margin */
}

.chat-input button:hover:not(:disabled) {
    background-color: var(--accent-primary-hover);
}

.chat-input button:active:not(:disabled) {
    transform: scale(0.95);
}

.chat-input button:disabled {
    background-color: var(--border-color);
    color: var(--text-secondary);
    cursor: not-allowed;
    box-shadow: none;
}

#mic-button {
    background-color: var(--mic-bg);
}
#mic-button:hover:not(:disabled) {
    background-color: var(--mic-bg-hover);
}
#mic-button.active {
    background-color: var(--mic-bg-hover);
}

.chat-input button svg {
    width: 22px;
    height: 22px;
    fill: currentColor;
}

.send-icon {
    width: 22px;
    height: 22px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

/* 9. Footer */
.chat-footer {
    background-color: #3e82e8;
    color: #ffffff;
    padding: 4px 6px;
    text-align: center;
    /* border-top: 1px solid var(--border-color); */
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}
.chat-footer p {
    margin: 0;
    font-size: 0.75rem; /* 12px */
    opacity: 0.9;
}

/* 10. Loading Dots (Tetap Sama) */
@keyframes blink {
    0% { opacity: 0.2; }
    20% { opacity: 1; }
    100% { opacity: 0.2; }
}
.loading-dots span:nth-child(1) { animation: blink 1.4s infinite; }
.loading-dots span:nth-child(2) { animation: blink 1.4s infinite 0.2s; }
.loading-dots span:nth-child(3) { animation: blink 1.4s infinite 0.4s; }

/* 11. Responsive (Mobile) */
@media (max-width: 600px) {
    body {
        padding: 0;
    }
    .chat-container {
        width: 100%;
        height: 100vh;
        max-height: 100vh;
        border-radius: 0;
        box-shadow: none;
    }
    .chat-input {
        padding: 8px;
        gap: 6px;
    }
    .chat-input textarea {
        padding: 10px 14px;
        min-height: 40px;
    }
    .chat-input button {
        width: 40px;
        height: 40px;
    }
    .chat-input button svg {
        width: 20px;
        height: 20px;
    }
    .send-icon {
        width: 20px;
        height: 20px;
    }
}