/* =====================================================================
   RhymeCraft - Geometric Balance Stylesheet
   ===================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&family=Space+Grotesk:wght@500;700&display=swap');

:root {
    --bg-primary: #f8fafc; /* Slate-50 */
    --bg-surface: #ffffff;
    --border-color: #e2e8f0; /* Slate-200 */
    --text-main: #0f172a; /* Slate-900 */
    --text-muted: #64748b; /* Slate-500 */
    --accent: #4f46e5; /* Indigo-600 */
    --accent-hover: #4338ca;
    --accent-light: #e0e7ff;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-display: 'Space Grotesk', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius: 8px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    padding: 2rem 1rem;
}

.app-container {
    max-width: 1100px;
    margin: 0 auto;
}

/* Header & Branding */
header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.brand-wrapper {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.brand-icon {
    width: 2.5rem;
    height: 2.5rem;
    background-color: var(--accent);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    font-size: 1.25rem;
    font-weight: bold;
}

h1 {
    font-family: var(--font-display);
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-main);
}

.tagline {
    color: var(--text-muted);
    font-size: 0.95rem;
    max-width: 600px;
    margin: 0.25rem auto 0;
}

/* Search Dashboard */
.search-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
}

.search-form {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1rem;
}

@media (max-width: 640px) {
    .search-form {
        grid-template-columns: 1fr;
    }
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
    font-size: 1.1rem;
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.75rem;
    font-size: 1rem;
    font-family: var(--font-sans);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-primary);
    color: var(--text-main);
    transition: all 0.2s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent);
    background-color: var(--bg-surface);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.btn-primary {
    background-color: var(--accent);
    color: white;
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

.btn-primary:active {
    transform: scale(0.98);
}

/* Filters Grid */
.filters-toggle-btn {
    background: none;
    border: none;
    color: var(--accent);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    margin-top: 1rem;
}

.filters-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--border-color);
}

@media (max-width: 640px) {
    .filters-panel {
        grid-template-columns: 1fr;
    }
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.filter-group label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.filter-select, .filter-input {
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-primary);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--text-main);
    transition: all 0.2s ease;
}

.filter-select:focus, .filter-input:focus {
    outline: none;
    border-color: var(--accent);
    background-color: var(--bg-surface);
}

/* Dashboard Body & Layout */
.results-grid {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .results-grid {
        grid-template-columns: 1fr;
    }
}

/* Left Column: Word details */
.word-details-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    align-self: start;
    position: sticky;
    top: 1.5rem;
}

.word-meta-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

.pronunciation-tag {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    background-color: var(--accent-light);
    color: var(--accent);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    display: inline-block;
    margin-bottom: 1rem;
}

.word-meta-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid #f1f5f9;
    font-size: 0.9rem;
}

.word-meta-item:last-child {
    border-bottom: none;
}

.word-meta-label {
    color: var(--text-muted);
    font-weight: 500;
}

.word-meta-val {
    font-weight: 600;
}

.word-definition {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.word-definition strong {
    color: var(--text-main);
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
}

/* Right Column: Tabbed Lists */
.rhyme-tabs {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.tabs-header {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    background-color: #f8fafc;
    overflow-x: auto;
}

.tab-btn {
    background: none;
    border: none;
    padding: 1rem 1.25rem;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.tab-btn:hover {
    color: var(--text-main);
    background-color: #f1f5f9;
}

.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
    background-color: var(--bg-surface);
    font-weight: 600;
}

.tab-count {
    background-color: #e2e8f0;
    color: var(--text-main);
    font-size: 0.75rem;
    padding: 0.1rem 0.4rem;
    border-radius: 9999px;
    font-weight: bold;
}

.tab-btn.active .tab-count {
    background-color: var(--accent-light);
    color: var(--accent);
}

/* Results Content */
.tab-content {
    padding: 1.5rem;
}

.tab-panel {
    display: none;
}

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

.word-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
}

.word-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1rem;
    transition: all 0.2s ease;
    position: relative;
    cursor: help;
}

.word-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
}

.word-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.25rem;
}

.word-card-title {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-main);
}

.word-card-score {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: bold;
    color: var(--accent);
    background-color: var(--accent-light);
    padding: 0.1rem 0.35rem;
    border-radius: 4px;
}

.word-card-ipa {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.word-card-syllables {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.word-card-definition {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    border-top: 1px dashed var(--border-color);
    padding-top: 0.5rem;
    line-height: 1.3;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #cbd5e1;
}

.empty-state p {
    max-width: 320px;
    margin: 0.5rem auto 0;
    font-size: 0.9rem;
}

/* Status States */
.loading-overlay {
    display: none;
    text-align: center;
    padding: 4rem;
}

.spinner {
    width: 2.5rem;
    height: 2.5rem;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s infinite linear;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Footer info */
footer {
    text-align: center;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.8rem;
}