/* ==========================================================================
   COSYlanguages Standalone App Stylesheet — Sage & Cream Aesthetic
   ========================================================================== */

:root {
    --sage-primary: var(--sage);
    --sage-dark: var(--sage-dark);
    --sage-light: var(--sage-light);
    --cream-bg: var(--paper-bg);
    --cream-card: var(--surface-color);
    --ink-text: var(--ink);
    --ink-muted: var(--ink-soft);
    --terracotta: var(--coral);
    --ending-highlight: var(--ire-col);
    --accent-gold: var(--honey);
    --border-color: var(--border);
    --shadow-soft: 0 4px 15px rgba(27, 67, 50, 0.06);
    --shadow-hover: 0 8px 25px rgba(27, 67, 50, 0.12);
    --radius-card: 16px;
    --radius-pill: 30px;
    --space-xs: 0.3rem;
    --space-sm: 0.5rem;
    --space-md: 0.8rem;
    --space-lg: 1rem;
    --space-xl: 1.5rem;
    --space-2xl: 2rem;
    --font-main: var(--font-sans);
}

/* Base Body Setup */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 700;
}

body {
    background: var(--paper-gradient, var(--cream-bg));
    background-attachment: fixed;
    color: var(--ink-text);
    font-family: var(--font-main);
    line-height: 1.6;
    padding: 0;
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 1.5rem;
    width: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo-badge {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.brand-icon {
    font-size: 2.2rem;
    background-color: var(--cream-card);
    padding: 0.6rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.brand-text h1 {
    font-size: 1.6rem;
    color: var(--sage-primary);
    font-weight: 700;
    letter-spacing: -0.5px;
}

.brand-text .tagline {
    font-size: 0.9rem;
    color: var(--ink-muted);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.mode-toggle-btn {
    background-color: var(--cream-card);
    border: 2px solid var(--sage-primary);
    color: var(--sage-primary);
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-pill);
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
}

.mode-toggle-btn:hover {
    background-color: var(--sage-primary);
    color: var(--warm-white);
}

.install-pwa-btn {
    background-color: var(--sage-primary);
    color: var(--warm-white);
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-pill);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.install-pwa-btn:hover {
    background-color: var(--sage-light);
    transform: translateY(-1px);
}

/* Search Bar Section */
.search-section {
    position: relative;
    margin-bottom: 2rem;
}

.search-box {
    display: flex;
    align-items: center;
    background-color: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-pill);
    padding: 0.5rem 1.2rem;
    box-shadow: var(--shadow-soft);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-box:focus-within {
    border-color: var(--sage-primary);
    box-shadow: 0 0 0 4px rgba(27, 67, 50, 0.15);
}

.search-icon {
    font-size: 1.2rem;
    margin-right: 0.8rem;
    color: var(--ink-muted);
}

.search-box input {
    border: none;
    outline: none;
    width: 100%;
    font-size: 1.1rem;
    color: var(--ink-text);
    background: transparent;
}

.clear-btn {
    background: none;
    border: none;
    font-size: 1.4rem;
    color: var(--ink-muted);
    cursor: pointer;
    display: none;
    padding: 0 0.4rem;
}

.clear-btn:hover {
    color: var(--terracotta);
}

.suggestions-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-top: 0.5rem;
    box-shadow: var(--shadow-hover);
    z-index: 10;
    max-height: 200px;
    overflow-y: auto;
    display: none;
}

.suggestion-item {
    padding: 0.75rem 1.2rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    transition: background-color 0.15s ease;
}

.suggestion-item:hover {
    background-color: var(--cream-card);
}

/* Practice Game Card */
.game-card {
    background: var(--surface-color);
    border: 2px solid var(--accent-gold);
    border-radius: var(--radius-card);
    padding: 2rem;
    box-shadow: var(--shadow-hover);
    margin-bottom: 2rem;
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.game-title h2 {
    color: var(--sage-primary);
    font-size: 1.6rem;
}

.game-title p {
    color: var(--ink-muted);
    font-size: 0.9rem;
}

.score-badge {
    background-color: var(--cream-card);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border-color);
    display: flex;
    gap: 1rem;
    font-size: 0.95rem;
}

.streak {
    color: var(--terracotta);
}

.game-prompt-box {
    text-align: center;
    background-color: var(--cream-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.prompt-label {
    font-size: 0.9rem;
    color: var(--ink-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.game-prompt-box h3 {
    font-size: 2.2rem;
    color: var(--sage-primary);
    margin: 0.3rem 0;
}

.prompt-details {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.8rem;
    margin-top: 0.5rem;
}

.prompt-pronoun {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--terracotta);
}

.game-input-group {
    display: flex;
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.game-input-group input {
    flex: 1;
    padding: 0.8rem 1.2rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-pill);
    font-size: 1.1rem;
    outline: none;
}

.game-input-group input:focus {
    border-color: var(--sage-primary);
}

.game-btn {
    background-color: var(--sage-primary);
    color: var(--warm-white);
    border: none;
    padding: 0.8rem 1.8rem;
    border-radius: var(--radius-pill);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.game-btn:hover {
    background-color: var(--sage-light);
}

.secondary-btn {
    background-color: var(--cream-card);
    color: var(--sage-dark);
    border: 1px solid var(--border-color);
    width: 100%;
}

.secondary-btn:hover {
    background-color: var(--accent-gold);
    color: var(--warm-white);
}

.feedback-card {
    padding: 1rem;
    border-radius: 12px;
    margin-bottom: 1rem;
    font-weight: 600;
    text-align: center;
}

.feedback-card.correct {
    background-color: var(--green-light);
    color: var(--sage-dark);
    border: 1px solid var(--border);
}

.feedback-card.wrong {
    background-color: var(--rose-light);
    color: var(--rose);
    border: 1px solid var(--border);
}

/* Verb Result Display Card */
.verb-result-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-card);
    padding: 2rem;
    box-shadow: var(--shadow-soft);
    margin-bottom: 2rem;
}

.verb-header {
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;
}

.verb-title-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.2rem;
}

.verb-title-group h2 {
    font-size: 2.2rem;
    color: var(--sage-primary);
    font-weight: 800;
}

.badge {
    background-color: var(--cream-card);
    color: var(--sage-dark);
    padding: 0.35rem 0.8rem;
    border-radius: var(--radius-pill);
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
}

.aux-badge {
    background-color: var(--sage-light);
    color: var(--sage-primary);
    border-color: var(--border);
}

.tts-btn {
    background-color: var(--cream-card);
    border: 1px solid var(--border-color);
    color: var(--ink-text);
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius-pill);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.2s ease;
}

.tts-btn:hover {
    background-color: var(--sage-primary);
    color: var(--warm-white);
}

/* Lexical Enrichment Box */
.lexical-box {
    background-color: var(--cream-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.lexical-label {
    font-weight: 700;
    color: var(--sage-primary);
    margin-right: 0.5rem;
    font-size: 0.95rem;
}

.def-text {
    font-style: italic;
    color: var(--ink-text);
}

.usage-block {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    flex-wrap: wrap;
    background-color: var(--sage-mist);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    border-left: 3px solid var(--sage-primary);
}

.usage-text {
    font-weight: 600;
    color: var(--sage-primary);
}

.grammar-rule-block {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    flex-wrap: wrap;
    background-color: var(--honey-pale);
    padding: 0.45rem 0.85rem;
    border-radius: 8px;
    border-left: 3px solid var(--terracotta);
}

.rule-text {
    font-weight: 600;
    color: var(--ink-text);
}

.antonyms-block {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.pills-list {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.antonym-pill {
    background-color: var(--surface-color);
    border: 1px solid var(--accent-gold);
    color: var(--sage-dark);
    padding: 0.2rem 0.7rem;
    border-radius: var(--radius-pill);
    font-size: 0.85rem;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.15s ease;
}

.antonym-pill:hover {
    background-color: var(--accent-gold);
    color: var(--warm-white);
}

/* Pattern Recognition: Color-Coded Stem & Ending */
.stem {
    color: var(--sage-dark);
}

.ending {
    color: var(--terracotta);
    font-weight: 800;
}

/* Tense Grid Setup */
.tense-grid-layout {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.mode-section h3 {
    font-size: 1.3rem;
    color: var(--sage-primary);
    margin-bottom: 1rem;
    border-left: 4px solid var(--sage-primary);
    padding-left: 0.6rem;
}

.tense-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.2rem;
}

.tense-card {
    background-color: var(--cream-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
}

.tense-card h4 {
    font-size: 0.95rem;
    color: var(--terracotta);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.4rem;
}

.conjugation-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    font-size: 0.95rem;
}

.conjugation-list li {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    white-space: nowrap;
    gap: 0.5rem;
}

.conjugation-list .pronoun {
    color: var(--ink-muted);
    white-space: nowrap;
}

.conjugation-list .verb-form {
    font-weight: 700;
    white-space: nowrap;
}

/* Empty State */
.empty-state-box {
    background: var(--surface-color);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-card);
    padding: 3rem 2rem;
    text-align: center;
    margin-bottom: 2rem;
}

.empty-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
}

.empty-state-box h3 {
    color: var(--sage-primary);
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

.empty-state-box p {
    color: var(--ink-muted);
    max-width: 600px;
    margin: 0 auto 1.5rem auto;
}

.quick-tags {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: var(--ink-muted);
}

.tag-btn {
    background-color: var(--cream-card);
    border: 1px solid var(--border-color);
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-pill);
    cursor: pointer;
    font-weight: 600;
    color: var(--sage-primary);
    transition: all 0.15s ease;
}

.tag-btn:hover {
    background-color: var(--sage-primary);
    color: var(--warm-white);
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border-color);
    color: var(--ink-muted);
    font-size: 0.85rem;
    margin-top: auto;
}

/* ==========================================================================
   Responsive Adaptations & Mobile Touch Optimizations
   ========================================================================== */
@media (max-width: 768px) {
    .app-container {
        padding: 1rem 0.8rem;
    }

    .app-header {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
        gap: 0.8rem;
        margin-bottom: 1.2rem;
        padding-bottom: 1rem;
    }

    .logo-badge {
        justify-content: center;
    }

    .header-actions {
        justify-content: center;
        width: 100%;
        gap: 0.5rem;
    }

    .mode-toggle-btn, .install-pwa-btn, .tag-btn, .choice-btn, .game-btn, .tts-btn {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .mode-toggle-btn {
        width: 100%;
    }

    .verb-result-card, .game-card, .noun-result-card, .empty-state-box {
        padding: 1.25rem 1rem;
    }

    .verb-title-group {
        justify-content: center;
        text-align: center;
    }

    .game-input-group {
        flex-direction: column;
    }

    .game-input-group input {
        width: 100%;
        min-height: 44px;
    }

    .game-btn {
        width: 100%;
    }

    .tense-cards {
        grid-template-columns: 1fr;
    }

    .table-wrap {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin-top: 0.5rem;
        border-radius: 12px;
        width: 100%;
    }
}

/* Multiple Choice Options Grid */
.mc-options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin: 16px 0;
}
.mc-option-btn {
    background: var(--cream-card, var(--surface-color));
    border: 2px solid var(--sage-light, var(--border));
    border-radius: 8px;
    padding: 0.75rem 0.875rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--ink-main, var(--ink));
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
}
.mc-option-btn:hover {
    border-color: var(--terracotta, var(--coral));
    background: var(--surface-color);
    transform: translateY(-2px);
}
.active-mode {
    background: var(--terracotta, var(--coral)) !important;
    color: var(--warm-white) !important;
    cursor: pointer;
}