/* --- Basic Setup & Variables --- */
:root {
    --primary-color: #4a4e69;
    --secondary-color: #9a8c98;
    --background-color: #f2e9e4;
    --card-background: #ffffff;
    --correct-color: #4CAF50;
    --incorrect-color: #F44336;
    --almost-color: #FF9800;
    --recording-color: #db4437;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--primary-color);
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    box-sizing: border-box;
}

/* --- Main App Layout & General Helpers --- */
.app-container {
    width: 100%;
    max-width: 600px;
    text-align: center;
}
h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}
.hidden {
    display: none !important;
}

/* --- Main Mode Selection Buttons --- */
.mode-selection {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 2px solid #ddd;
    padding-bottom: 15px;
}
.mode-btn {
    background-color: transparent;
    border: 2px solid var(--secondary-color);
    color: var(--secondary-color);
    padding: 8px 15px;
    border-radius: 20px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease;
}
.mode-btn:hover {
    background-color: var(--secondary-color);
    color: white;
}
.mode-btn.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* --- Flashcard Mode --- */
.category-selector { margin-bottom: 25px; }
.category-selector label { display: block; margin-bottom: 8px; font-weight: 500; color: var(--secondary-color); }
.category-selector select { width: 100%; max-width: 350px; padding: 10px; font-size: 1rem; border: 2px solid var(--secondary-color); border-radius: 8px; background-color: #fff; cursor: pointer; }
.phrase-card { background-color: var(--card-background); border-radius: 12px; padding: 30px 20px; box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1); margin-bottom: 25px; }
.phrase-japanese { font-size: 2.8rem; font-weight: bold; margin: 0 0 10px 0; color: #22223b; }
.phrase-romaji { font-size: 1.5rem; font-style: italic; color: var(--secondary-color); margin: 10px 0; }
.phrase-english { font-size: 1.2rem; color: var(--secondary-color); margin: 0; }
.feedback-container { min-height: 60px; display: flex; justify-content: center; align-items: center; padding: 10px; border-radius: 8px; margin-bottom: 25px; background-color: rgba(0,0,0,0.03); }
.feedback-text { font-size: 1.3rem; font-weight: 500; }
.feedback-text.correct { color: var(--correct-color); }
.feedback-text.incorrect { color: var(--incorrect-color); }
.feedback-text.almost { color: var(--almost-color); }

/* --- Conversation Mode --- */
.conversation-actions { margin-bottom: 15px; }
#chat-container { background-color: var(--card-background); border-radius: 12px; box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1); height: 40vh; padding: 15px; overflow-y: auto; display: flex; flex-direction: column; margin-bottom: 20px; }
.chat-message { max-width: 80%; padding: 10px 15px; border-radius: 18px; margin-bottom: 10px; line-height: 1.4; text-align: left; }
.chat-message.user { background-color: #007bff; color: white; align-self: flex-end; border-bottom-right-radius: 4px; }
.chat-message.ai { background-color: #e9e9eb; color: #333; align-self: flex-start; border-bottom-left-radius: 4px; }
.chat-message.ai.typing { font-style: italic; color: #666; }
#chat-feedback-container { margin-top: 10px; padding: 15px; background-color: #fffaf0; border-radius: 8px; border-left: 5px solid var(--almost-color); text-align: left; }
#chat-feedback-container h3 { margin-top: 0; color: var(--primary-color); font-size: 1.1rem; }
#chat-feedback-container p { margin: 0.5em 0; }
#chat-feedback-container .correction { font-weight: bold; color: var(--correct-color); }

/* --- Reading Mode --- */
.reading-nav { display: flex; justify-content: center; gap: 10px; margin-bottom: 20px; }
.sub-mode-btn { background-color: transparent; border: 1px solid var(--secondary-color); color: var(--secondary-color); padding: 8px 15px; border-radius: 8px; font-weight: bold; cursor: pointer; transition: all 0.2s ease; }
.sub-mode-btn:hover { background-color: var(--secondary-color); color: white; }
.sub-mode-btn.active { background-color: var(--primary-color); border-color: var(--primary-color); color: white; }
.reading-plan-container { background-color: var(--card-background); border-radius: 12px; padding: 20px 30px; text-align: left; line-height: 1.6; }
.reading-plan-container h2 { color: var(--primary-color); text-align: center; }
.reading-plan-container p { color: var(--secondary-color); text-align: center; margin-bottom: 20px; }
.reading-level { border: 1px solid #ddd; border-radius: 8px; margin-bottom: 10px; overflow: hidden; }
.reading-level summary { font-size: 1.2rem; font-weight: bold; padding: 15px; cursor: pointer; outline: none; list-style-position: inside; }
.reading-level[open] summary { border-bottom: 1px solid #ddd; }
.level-content { padding: 0 20px 20px 20px; text-align: left; }
.level-content h3 { color: #22223b; border-bottom: 1px solid #eee; padding-bottom: 5px; margin-top: 10px; }
.level-content ul { padding-left: 20px; list-style-type: '✓ '; }
.level-content li { margin-bottom: 10px; }
.level-content strong { color: var(--primary-color); }
.kana-container { background-color: var(--card-background); border-radius: 12px; padding: 20px; }
.kana-section { margin-bottom: 2em; }
.kana-section h3 { text-align: center; color: var(--primary-color); margin-bottom: 1em; border-bottom: 1px solid #eee; padding-bottom: 0.5em; }
.kana-grid { display: grid; gap: 8px; }
.kana-grid.basic { grid-template-columns: repeat(5, 1fr); }
.kana-grid.dakuten { grid-template-columns: repeat(5, 1fr); }
.kana-grid.combination { grid-template-columns: repeat(3, 1fr); }
.kana-item { background-color: #f8f9fa; border: 1px solid #dee2e6; border-radius: 8px; padding: 5px; display: flex; flex-direction: column; justify-content: center; align-items: center; cursor: pointer; transition: transform 0.2s ease, box-shadow 0.2s ease; min-height: 60px; }
.kana-item:hover { transform: translateY(-3px); box-shadow: 0 4px 10px rgba(0,0,0,0.1); }
.kana-romaji-top { font-size: 0.8rem; color: var(--secondary-color); }
.kana-char-big { font-size: 2.2rem; color: #22223b; }

/* --- Shared Controls & Buttons --- */
.controls { display: flex; justify-content: center; gap: 20px; margin-top: 25px; }
.control-btn { background-color: var(--card-background); border: 2px solid var(--secondary-color); border-radius: 50%; width: 80px; height: 80px; cursor: pointer; display: flex; justify-content: center; align-items: center; transition: all 0.2s ease-in-out; }
.control-btn img { width: 40px; height: 40px; }
.control-btn:hover { transform: translateY(-3px); box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15); }
#speak-btn.recording { background-color: var(--recording-color); border-color: var(--recording-color); animation: pulse 1.5s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(219, 68, 55, 0.7); } 70% { box-shadow: 0 0 0 20px rgba(219, 68, 55, 0); } 100% { box-shadow: 0 0 0 0 rgba(219, 68, 55, 0); } }
.nav-btn { background-color: var(--primary-color); color: white; border: none; border-radius: 8px; padding: 12px 25px; font-size: 1rem; font-weight: bold; cursor: pointer; transition: background-color 0.2s; text-transform: uppercase; }
.nav-btn:hover { background-color: #22223b; }
.nav-btn.secondary { background-color: var(--secondary-color); }
.nav-btn.secondary:hover { background-color: #6d616d; }
.nav-btn:disabled { background-color: #c8c8c8; cursor: not-allowed; opacity: 0.6; }
.deck-nav { display: flex; justify-content: center; align-items: center; gap: 20px; margin-bottom: 15px; }
#phrase-position-indicator { font-size: 1.2rem; font-weight: 500; color: var(--secondary-color); min-width: 60px; text-align: center; }
.app-actions { display: flex; justify-content: center; gap: 15px; flex-wrap: wrap; }

/* --- Progress Modal Styling --- */
.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.6); display: flex; justify-content: center; align-items: center; z-index: 1000; opacity: 1; transition: opacity 0.3s ease; }
.modal-overlay.hidden { opacity: 0; pointer-events: none; }
.modal-content { background-color: var(--background-color); padding: 30px; border-radius: 12px; width: 90%; max-width: 800px; max-height: 80vh; overflow-y: auto; position: relative; box-shadow: 0 5px 20px rgba(0,0,0,0.2); }
.modal-content h2 { margin-top: 0; text-align: center; color: var(--primary-color); }
.close-btn { position: absolute; top: 10px; right: 15px; background: none; border: none; font-size: 2.5rem; color: var(--secondary-color); cursor: pointer; line-height: 1; }
table { width: 100%; border-collapse: collapse; margin-top: 20px; }
th, td { padding: 12px 10px; text-align: left; border-bottom: 1px solid #ddd; }
th { background-color: #e2d8d3; font-weight: bold; color: var(--primary-color); }
td:nth-child(1) { font-weight: 500; font-size: 1.2rem; }

/* --- Responsive Design --- */
@media (max-width: 768px) {
    body { padding: 15px; }
    .app-container { max-width: 100%; }
    h1 { font-size: 2rem; }
    .mode-selection { justify-content: center; flex-wrap: wrap;}
    .phrase-japanese { font-size: 2.2rem; }
    .phrase-romaji { font-size: 1.3rem; }
    .phrase-english { font-size: 1.1rem; }
    .control-btn { width: 70px; height: 70px; }
    .control-btn img { width: 35px; height: 35px; }
    .deck-nav, .app-actions { flex-direction: column; gap: 10px; }
    .modal-content { width: 95%; max-height: 85vh; padding: 20px; }
    .modal-content h2 { font-size: 1.5rem; }
    th, td { font-size: 0.9rem; padding: 8px 5px; }
    .kana-char-big { font-size: 1.8rem; }
    .kana-item { min-height: 50px; }
}

/* --- [THE FIX IS HERE] - Logout Button Styling --- */
.logout-container {
    position: absolute;
    top: 20px;
    right: 20px;
}

.logout-btn {
    background-color: var(--secondary-color);
    color: white;
    padding: 8px 15px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: bold;
    transition: background-color 0.2s ease;
}

.logout-btn:hover {
    background-color: var(--primary-color);
}
/* --- End of Logout Button Styling --- */
/* --- Login Page Styling --- */
.login-container {
    background-color: var(--card-background);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    text-align: center;
    width: 100%;
    max-width: 400px;
    margin: 20px;
    box-sizing: border-box;
}
.login-container h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}
.login-container p {
    margin-top: 0;
    margin-bottom: 30px;
    color: var(--secondary-color);
}
.login-container input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 8px;
    box-sizing: border-box;
    font-size: 1rem;
}
.login-container .nav-btn {
    width: 100%;
}
#error-message {
    color: var(--incorrect-color);
    margin-top: 15px;
    min-height: 20px;
    font-weight: 500;
}


/* --- Logout Button Styling --- */
.logout-container {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 10; /* Ensure it's above other content */
}

.logout-btn {
    background-color: var(--secondary-color);
    color: white;
    padding: 8px 15px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: bold;
    transition: background-color 0.2s ease;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.logout-btn:hover {
    background-color: var(--primary-color);
}


/* --- [THE FIX IS HERE] - Responsive Login & Logout --- */
@media (max-width: 768px) {
    /* Make login card less padded on mobile */
    .login-container {
        padding: 30px 25px;
        margin: 15px;
    }
    .login-container h1 {
        font-size: 2rem;
    }

    /* Make logout button smaller and closer to the corner on mobile */
    .logout-container {
        top: 10px;
        right: 10px;
    }
    .logout-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
}