:root {
    /* Warna Dasar Dark Eco */
    --eco-neon: #10b981;
    --eco-dark: #064e3b;
    --tech-slate: #1e293b;
    
    /* Background Baru (Menggantikan Putih) */
    --bg-main: #091210; /* Hitam dengan hint hijau gelap */
    --bg-panel: #111d1a; /* Abu-abu kehijauan untuk input/sidebar */
    --border-color: #1e362d;
    --text-light: #e2e8f0;
    --text-muted: #94a3b8;
    
    --bg-page: #dcfce7; /* Background luar tetap hijau muda agar kontras */
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-page);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

/* Container Utama */
.chat-container {
    width: 100%;
    max-width: 950px;
    height: 92vh;
    background-color: var(--bg-main);
    display: flex;
    flex-direction: column;
    border-radius: 24px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    position: relative;
}

/* --- SIDEBAR HISTORI --- */
.sidebar {
    position: absolute;
    top: 0;
    left: -320px;
    width: 300px;
    height: 100%;
    background-color: var(--bg-panel);
    border-right: 1px solid var(--border-color);
    z-index: 1000;
    transition: left 0.3s ease;
    display: flex;
    flex-direction: column;
}

.sidebar.open { left: 0; }

.sidebar-header {
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.1rem;
    color: var(--text-light);
}

.history-list {
    padding: 16px;
    overflow-y: auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.history-item {
    background: rgba(16, 185, 129, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-light);
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.history-item:hover {
    border-color: var(--eco-neon);
    background: rgba(16, 185, 129, 0.1);
}

.overlay {
    position: absolute; inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999; opacity: 0; pointer-events: none;
    transition: opacity 0.3s;
}
.overlay.show { opacity: 1; pointer-events: all; }

.btn-icon {
    background: none; border: none; cursor: pointer;
    color: var(--text-muted); display: flex; align-items: center;
    padding: 8px; border-radius: 8px; transition: 0.2s;
}
.btn-icon:hover { color: var(--eco-neon); background: rgba(255,255,255,0.05); }

/* --- HEADER --- */
.chat-header {
    background: linear-gradient(135deg, var(--tech-slate) 0%, var(--eco-dark) 100%);
    padding: 20px 28px;
    border-bottom: 2px solid var(--eco-neon);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 10;
}

.header-profile { display: flex; align-items: center; gap: 14px; }

.logo-icon {
    width: 44px; height: 44px;
    background: linear-gradient(135deg, var(--eco-neon), #047857);
    border-radius: 14px; display: flex; justify-content: center; align-items: center;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.header-text h1 {
    font-family: 'Outfit', sans-serif; font-size: 1.25rem;
    font-weight: 700; color: #ffffff; letter-spacing: -0.5px;
}
.header-text p { font-size: 0.8rem; color: #a7f3d0; margin-top: 2px; }

.btn-new-chat {
    background: rgba(255, 255, 255, 0.1); color: #ffffff;
    border: 1px solid rgba(16, 185, 129, 0.5); padding: 8px 16px;
    border-radius: 20px; font-size: 0.85rem; font-weight: 600;
    cursor: pointer; display: flex; align-items: center; gap: 6px;
    transition: all 0.3s;
}
.btn-new-chat:hover { background: var(--eco-neon); border-color: var(--eco-neon); }

/* --- AREA CHAT --- */
.chat-messages {
    flex: 1; overflow-y: auto; padding: 30px;
    display: flex; flex-direction: column; gap: 20px;
    background-color: var(--bg-main);
}

.message { display: flex; gap: 14px; max-width: 85%; animation: slideUp 0.3s ease; }
@keyframes slideUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.bot-message { align-self: flex-start; }
.user-message { align-self: flex-end; flex-direction: row-reverse; }

.message-avatar {
    width: 38px; height: 38px; border-radius: 12px;
    background-color: var(--bg-panel); color: var(--eco-neon);
    display: flex; justify-content: center; align-items: center; flex-shrink: 0;
    border: 1px solid var(--border-color);
}

.message-content {
    padding: 16px 20px; border-radius: 18px;
    font-size: 0.95rem; line-height: 1.6; word-wrap: break-word;
}

/* Jawaban Bot */
.bot-message .message-content {
    background: linear-gradient(135deg, var(--tech-slate) 0%, #022c22 100%);
    color: var(--text-light);
    border: 1px solid var(--eco-neon);
    border-top-left-radius: 4px;
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.1);
}
.bot-message .message-content p { margin-bottom: 10px; }
.bot-message .message-content p:last-child { margin-bottom: 0; }
.bot-message .message-content h1, .bot-message .message-content h2, .bot-message .message-content h3 {
    color: #34d399; margin-top: 16px; margin-bottom: 8px; font-family: 'Outfit', sans-serif;
}
.bot-message .message-content strong { color: #6ee7b7; font-weight: 600; }
.bot-message .message-content ul { margin-left: 20px; margin-bottom: 12px; }

/* Jawaban User */
.user-message .message-content {
    background-color: var(--bg-panel);
    color: var(--text-light);
    border: 1px solid var(--border-color);
    border-top-right-radius: 4px;
}

/* --- INPUT AREA --- */
.chat-input-area {
    padding: 20px 30px; background-color: var(--bg-panel);
    border-top: 1px solid var(--border-color);
}

.input-wrapper {
    display: flex; align-items: center; gap: 12px;
    background-color: var(--bg-main); border-radius: 30px;
    padding: 10px 14px 10px 24px; border: 1px solid var(--border-color);
    transition: border-color 0.3s;
}
.input-wrapper:focus-within { border-color: var(--eco-neon); }

textarea {
    flex: 1; border: none; background: transparent;
    font-family: 'Inter', sans-serif; font-size: 1rem; color: var(--text-light);
    resize: none; height: 24px; max-height: 120px; outline: none; padding: 2px 0;
}
textarea::placeholder { color: var(--text-muted); }

.btn-send {
    background: linear-gradient(135deg, var(--eco-neon), var(--eco-dark));
    color: #fff; border: none; width: 44px; height: 44px; border-radius: 50%;
    display: flex; justify-content: center; align-items: center; cursor: pointer;
    transition: all 0.3s; flex-shrink: 0;
}
.btn-send:hover { transform: scale(1.05); }

/* Shortcut Chips */
.shortcuts-container {
    padding: 16px 30px; display: flex; gap: 12px; overflow-x: auto;
    background-color: var(--bg-panel); scrollbar-width: none;
    border-top: 1px solid var(--border-color);
}
.shortcuts-container::-webkit-scrollbar { display: none; }

.shortcut-chip {
    background-color: var(--bg-main); color: var(--text-light);
    border: 1px solid var(--border-color); padding: 8px 16px;
    border-radius: 20px; font-size: 0.85rem; white-space: nowrap;
    cursor: pointer; transition: all 0.2s;
}
.shortcut-chip:hover { border-color: var(--eco-neon); color: var(--eco-neon); }

/* Typing Indicator */
.typing-indicator {
    display: none; align-items: center; gap: 4px; padding: 12px 18px;
    background: linear-gradient(135deg, var(--tech-slate) 0%, #022c22 100%);
    border: 1px solid var(--eco-neon); border-radius: 20px; border-top-left-radius: 4px;
    width: fit-content; margin-bottom: 20px;
}
.typing-indicator span {
    width: 6px; height: 6px; background-color: var(--eco-neon); border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out;
}
.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@media (max-width: 600px) {
    .chat-container { height: 100vh; border-radius: 0; }
    .hide-mobile { display: none; }
}