@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* --- Theme Variables --- */
:root {
    --bg-color: #f8fafc;
    --header-bg: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --accent-color: #3b82f6;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    --tung-text: #dc2626;
}

body.theme-default-dark {
    --bg-color: #0f172a;
    --header-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent-color: #38bdf8;
    --card-bg: #1e293b;
    --border-color: #334155;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    --tung-text: #f87171;
}

body.theme-neon {
    --bg-color: #121212;
    --header-bg: #1E1E1E;
    --text-primary: #ffffff;
    --text-secondary: #00FFD1;
    --accent-color: #00FFD1;
    --card-bg: #1E1E1E;
    --border-color: #00FFD144;
    --shadow: 0 0 15px rgba(0, 255, 209, 0.2);
    --tung-text: #00FFD1;
}

body.theme-crimson {
    --bg-color: #1a0a0a;
    --header-bg: #2d0f0f;
    --text-primary: #fecaca;
    --text-secondary: #ef4444;
    --accent-color: #b91c1c;
    --card-bg: #2d0f0f;
    --border-color: #451a1a;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    --tung-text: #ff4d4d;
}

/* --- Global Styles --- */
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    transition: background-color 0.3s ease;
}

.container {
    width: 100%;
    max-width: 550px;
    padding: 80px 20px 60px 20px;
}

/* --- Tabs --- */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    background: var(--header-bg);
    padding: 6px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 10px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9em;
}

.tab-btn.active {
    background: var(--accent-color);
    color: #fff;
}

.tab-content {
    display: none;
}

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

/* --- Settings --- */
.settings-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 100;
}

.settings-btn {
    background: var(--header-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: transform 0.2s;
}

.settings-btn:hover {
    transform: rotate(45deg);
}

.settings-dropdown {
    position: absolute;
    top: 50px;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 15px;
    display: none;
    flex-direction: column;
    gap: 8px;
    min-width: 150px;
    box-shadow: var(--shadow);
}

.settings-dropdown.active {
    display: flex;
}

.settings-dropdown h3 {
    margin: 0 0 10px 0;
    font-size: 0.9em;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.settings-dropdown button {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    text-align: left;
    font-size: 0.9em;
}

.settings-dropdown button:hover {
    background: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

/* --- Header Section --- */
.header-area {
    text-align: center;
    margin-bottom: 40px;
}

.main-icon {
    width: 28px;
    height: 28px;
    color: var(--accent-color);
    margin-bottom: 10px;
}

h1 {
    color: var(--text-primary);
    font-size: 2.2em;
    font-weight: 700;
    margin: 0 0 8px 0;
}

.subtitle {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.95em;
}

.section-title {
    font-size: 0.85em;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 15px;
}

/* --- Search Bar --- */
.search-wrapper {
    position: relative;
    margin-bottom: 35px;
}

.search-icon {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--text-secondary);
    pointer-events: none;
}

input, textarea {
    width: 100%;
    padding: 16px 20px 16px 50px;
    font-size: 16px;
    font-family: 'Inter', sans-serif;
    border-radius: 14px;
    border: 1px solid var(--border-color);
    outline: none;
    background-color: var(--card-bg);
    color: var(--text-primary);
    transition: all 0.2s ease;
    box-sizing: border-box;
    box-shadow: var(--shadow);
}

textarea {
    padding: 16px;
    min-height: 100px;
    resize: vertical;
}

input:focus, textarea:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
}

/* --- Translator --- */
.translator-output-wrapper {
    margin-top: 20px;
    background: var(--card-bg);
    padding: 24px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.translated-text {
    font-size: 1.25em;
    font-weight: 600;
    color: var(--tung-text);
    margin-bottom: 20px;
    line-height: 1.5;
}

.translator-actions {
    display: flex;
    gap: 10px;
}

.action-btn {
    background: var(--header-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9em;
    cursor: pointer;
    transition: all 0.2s;
}

.action-btn:hover {
    background: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

.action-btn.correct:hover { background: #22c55e; border-color: #22c55e; }
.action-btn.wrong:hover { background: #ef4444; border-color: #ef4444; }

/* --- tng-shsh Styles --- */
.cipher-controls {
    margin-bottom: 25px;
    padding: 20px;
    background: var(--header-bg);
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.input-group label {
    display: block;
    font-size: 0.9em;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.cipher-box {
    margin-bottom: 30px;
}

.cipher-box h3 {
    font-size: 1em;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.cipher-output-wrapper {
    margin-top: 15px;
    background: var(--header-bg);
    padding: 20px;
    border-radius: 14px;
    border: 1px solid var(--border-color);
}

.cipher-text {
    font-size: 1.1em;
    font-weight: 600;
    color: var(--tung-text);
    margin-bottom: 15px;
    word-break: break-all;
    min-height: 1.5em;
}

/* --- Flashcard --- */
.flashcard-container {
    perspective: 1000px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.score-board {
    font-weight: 700;
    color: var(--accent-color);
}

.flashcard {
    width: 100%;
    height: 200px;
    cursor: pointer;
}

.flashcard-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
    box-shadow: var(--shadow);
    border-radius: 16px;
}

.flashcard.flipped .flashcard-inner {
    transform: rotateY(180deg);
}

.flashcard-front, .flashcard-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    box-sizing: border-box;
}

.flashcard-back {
    transform: rotateY(180deg);
}

.flashcard .word {
    font-size: 1.8em;
    font-weight: 700;
}

.quiz-controls {
    display: flex;
    gap: 15px;
    width: 100%;
}

.quiz-controls .action-btn { flex: 1; text-align: center; }

/* --- Results Area --- */
#results {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.loading-text, .ready-text, .no-results {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.95em;
}

.divider-large {
    height: 1px;
    background: var(--border-color);
    margin: 40px 0;
}

/* --- App Cards & Badges --- */
.card {
    background: var(--card-bg);
    padding: 24px;
    border-radius: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.word-row {
    display: flex;
    align-items: center;
    gap: 14px;
}

.badge {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 8px;
    border-radius: 6px;
    letter-spacing: 0.5px;
    margin-bottom: 10px;
}

.english-badge {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--accent-color);
}

.tung-badge {
    background-color: rgba(220, 38, 38, 0.1);
    color: var(--tung-text);
}

.english-word {
    font-weight: 600;
    font-size: 1.25em;
    color: var(--text-primary);
}

.tunginised-word {
    font-weight: 600;
    font-size: 1.25em;
    color: var(--tung-text);
}

.divider {
    height: 1px;
    background-color: var(--border-color);
    margin: 14px 0;
}

@media (max-width: 600px) {
    .container {
        padding: 60px 15px 40px 15px;
    }
    h1 {
        font-size: 1.8em;
    }
}