/* =============================================================
   WRONGS & UNATTEMPTED LIBRARY STYLES — ULTRA PREMIUM DESIGN
   Dark-mode-first with [data-theme="dark"] support
   ============================================================= */

/* ===== Theme Variables ===== */
:root {
    --bg: #f0f2f5;
    --card-bg: #ffffff;
    --text: #1a1a2e;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --wr-accent: #ff5252;
    --wr-accent-hover: #ff3333;
    --wr-accent-light: rgba(255, 82, 82, 0.12);
    --green: #27ae60;
    --green-light: rgba(39, 174, 96, 0.1);
    --blue: #3498db;
    --orange: #ff9f43;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
    --radius: 12px;
    --radius-lg: 16px;
    --folder-bg: rgba(255, 82, 82, 0.04);
    --slot-hover: rgba(255, 82, 82, 0.06);
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.4);
}

[data-theme="dark"] {
    --bg: #0f172a;
    --card-bg: #1e293b;
    --text: #f8fafc;
    --text-secondary: #94a3b8;
    --border: #334155;
    --wr-accent: #ff7675;
    --wr-accent-hover: #ff9e9e;
    --wr-accent-light: rgba(255, 118, 117, 0.15);
    --green: #2ecc71;
    --green-light: rgba(46, 204, 113, 0.15);
    --blue: #5dade2;
    --orange: #ffb142;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 10px 35px rgba(0, 0, 0, 0.55);
    --folder-bg: rgba(255, 118, 117, 0.06);
    --slot-hover: rgba(255, 118, 117, 0.08);
    --glass-bg: rgba(30, 41, 59, 0.75);
    --glass-border: rgba(255, 255, 255, 0.08);
}

/* ===== Reset & Base ===== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    transition: background 0.3s, color 0.3s;
    overflow-x: hidden;
}

/* ===== Background Glows ===== */
.wr-bg-glows {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    z-index: -1;
    pointer-events: none;
}

.wr-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.35;
    animation: wrFloat 20s ease-in-out infinite alternate;
}

[data-theme="dark"] .wr-glow {
    opacity: 0.15;
}

.wr-glow-1 {
    width: 450px;
    height: 450px;
    background: #ff6b6b;
    top: -100px;
    right: -100px;
}

.wr-glow-2 {
    width: 500px;
    height: 500px;
    background: #feca57;
    bottom: -150px;
    left: -150px;
    animation-delay: -10s;
}

@keyframes wrFloat {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-30px, 40px) scale(1.1); }
    100% { transform: translate(30px, -20px) scale(0.95); }
}

/* ===== Header ===== */
.wr-header {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 14px 24px;
    box-shadow: var(--shadow);
    transition: background 0.3s, border-color 0.3s;
}

.wr-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.wr-header h1 {
    font-size: 22px;
    font-weight: 800;
    color: var(--wr-accent);
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: -0.5px;
}

.wr-nav-links {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

.wr-nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13.5px;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 20px;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.wr-nav-links a:hover {
    color: var(--text);
    background: rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] .wr-nav-links a:hover {
    background: rgba(255, 255, 255, 0.06);
}

.wr-nav-links a.active {
    color: var(--wr-accent);
    background: var(--wr-accent-light);
    border-color: rgba(255, 82, 82, 0.3);
}

.wr-dark-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    cursor: pointer;
    transition: transform 0.3s, border-color 0.2s;
    color: var(--text);
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.wr-dark-toggle:hover {
    transform: rotate(30deg) scale(1.05);
    border-color: var(--wr-accent);
}

/* ===== Analytics & Stat Cards ===== */
.wr-analytics {
    max-width: 1200px;
    margin: 24px auto 0;
    padding: 0 24px;
}

.wr-stat-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

@media (max-width: 900px) {
    .wr-stat-cards { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 500px) {
    .wr-stat-cards { grid-template-columns: 1fr; }
}

.wr-stat-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    box-shadow: var(--shadow);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    position: relative;
    overflow: hidden;
}

.wr-stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--wr-accent), var(--orange));
    opacity: 0.8;
    transition: opacity 0.3s;
}

.wr-stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.wr-stat-icon {
    font-size: 22px;
    margin-bottom: 4px;
}

.wr-stat-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.5px;
}

.wr-stat-card:nth-child(1) .wr-stat-value { color: var(--wr-accent); }
.wr-stat-card:nth-child(2) .wr-stat-value { color: var(--orange); }
.wr-stat-card:nth-child(3) .wr-stat-value { color: var(--blue); }
.wr-stat-card:nth-child(4) .wr-stat-value { color: var(--green); font-size: 20px; margin-top: 6px; }

.wr-stat-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

/* ===== 3-Button Segmented Category Bar ===== */
.wr-category-tabs {
    max-width: 1200px;
    margin: 0 auto 24px;
    padding: 0 24px;
}

.wr-tabs-inner {
    display: flex;
    gap: 12px;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    padding: 8px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    flex-wrap: wrap;
}

.wr-tab-btn {
    flex: 1;
    min-width: 220px;
    padding: 14px 20px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    background: transparent;
    color: var(--text-secondary);
    font-size: 14.5px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.wr-tab-btn:hover {
    background: var(--folder-bg);
    color: var(--wr-accent);
}

.wr-tab-btn.active {
    background: var(--card-bg);
    color: var(--wr-accent);
    border-color: rgba(255, 82, 82, 0.3);
    box-shadow: 0 4px 15px rgba(255, 82, 82, 0.15);
    font-weight: 700;
    transform: scale(1.01);
}

.wr-tab-count {
    font-size: 12px;
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-secondary);
    padding: 3px 10px;
    border-radius: 20px;
    font-weight: 700;
    transition: all 0.2s;
}

[data-theme="dark"] .wr-tab-count {
    background: rgba(255, 255, 255, 0.08);
}

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

/* ===== Action Controls Bar ===== */
.wr-controls {
    max-width: 1200px;
    margin: 0 auto 24px;
    padding: 0 24px;
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.wr-search {
    flex: 1;
    min-width: 260px;
    padding: 12px 18px 12px 42px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    background: var(--card-bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23999' viewBox='0 0 16 16'%3E%3Cpath d='M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85zm-5.242.656a5 5 0 1 1 0-10 5 5 0 0 1 0 10z'/%3E%3C/svg%3E") 16px center no-repeat;
    color: var(--text);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.wr-search:focus {
    border-color: var(--wr-accent);
    box-shadow: 0 0 0 3px var(--wr-accent-light);
}

.btn-generate-wrongs {
    background: linear-gradient(135deg, #00b894, #00cec9);
    color: white !important;
    border: none;
    padding: 11px 20px;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 15px rgba(0, 184, 148, 0.25);
    white-space: nowrap;
}

.btn-generate-wrongs:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 184, 148, 0.4);
}

.btn-clear-wrongs {
    background: rgba(231, 76, 60, 0.1);
    color: #e74c3c !important;
    border: 1px solid rgba(231, 76, 60, 0.3);
    padding: 10px 18px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.btn-clear-wrongs:hover {
    background: #e74c3c;
    color: white !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

/* ===== Export Banner ===== */
.wr-banner-container {
    max-width: 1200px;
    margin: 0 auto 24px;
    padding: 0 24px;
}

.wr-export-banner {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--wr-accent-light);
    border-radius: var(--radius-lg);
    padding: 18px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    box-shadow: var(--shadow);
    border-left: 5px solid var(--wr-accent);
}

.wr-banner-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 10px;
}

.wr-banner-sub {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ===== Main Content Area ===== */
.wr-content {
    max-width: 1200px;
    margin: 0 auto 50px;
    padding: 0 24px;
}

/* Tree Structure (Folders & Slots) */
.wr-tree-folder {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: box-shadow 0.25s, transform 0.2s;
}

.wr-tree-folder:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.wr-folder-header {
    padding: 18px 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    user-select: none;
    transition: background 0.15s;
}

.wr-folder-header:hover {
    background: var(--folder-bg);
}

.wr-folder-chevron {
    font-size: 12px;
    transition: transform 0.25s ease;
    color: var(--text-secondary);
    width: 16px;
    display: inline-block;
}

.wr-tree-folder.open > .wr-folder-header .wr-folder-chevron {
    transform: rotate(90deg);
}

.wr-folder-icon {
    font-size: 22px;
}

.wr-folder-badge {
    font-size: 12px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 12px;
    background: var(--wr-accent-light);
    color: var(--wr-accent);
    margin-left: auto;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.wr-folder-children {
    display: none;
    background: var(--bg);
    border-top: 1px solid var(--border);
    padding: 10px 0;
}

.wr-tree-folder.open > .wr-folder-children {
    display: block;
}

/* Slot Item Row */
.wr-slot-item {
    display: flex;
    align-items: center;
    padding: 14px 24px 14px 40px;
    gap: 14px;
    cursor: pointer;
    transition: background 0.15s, padding-left 0.15s;
    border-bottom: 1px solid var(--border);
    background: var(--card-bg);
    margin: 0 10px;
    border-radius: 8px;
    margin-bottom: 6px;
}

.wr-slot-item:last-child {
    margin-bottom: 0;
    border-bottom: none;
}

.wr-slot-item:hover {
    background: var(--slot-hover);
    padding-left: 44px;
}

.wr-slot-icon {
    font-size: 18px;
}

.wr-slot-name {
    flex: 1;
    font-size: 14.5px;
    font-weight: 600;
    color: var(--text);
}

.wr-slot-meta {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-left: auto;
}

.wr-slot-tag {
    font-size: 12px;
    color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.05);
    padding: 4px 10px;
    border-radius: 6px;
    font-weight: 600;
}

[data-theme="dark"] .wr-slot-tag {
    background: rgba(255, 255, 255, 0.08);
}

.wr-start-btn {
    padding: 8px 18px;
    background: linear-gradient(135deg, var(--wr-accent), #ff3838);
    color: white !important;
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    box-shadow: 0 4px 12px rgba(255, 82, 82, 0.35);
    display: flex;
    align-items: center;
    gap: 6px;
}

.wr-start-btn:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 18px rgba(255, 82, 82, 0.5);
}

/* ===== Empty State ===== */
.wr-empty-state {
    text-align: center;
    padding: 80px 20px;
    background: var(--card-bg);
    border: 1px dashed var(--border);
    border-radius: var(--radius-lg);
    max-width: 800px;
    margin: 40px auto;
    box-shadow: var(--shadow);
}

.wr-empty-icon {
    font-size: 64px;
    margin-bottom: 20px;
    animation: wrFloat 6s ease-in-out infinite alternate;
}

.wr-empty-state h2 {
    font-size: 24px;
    color: var(--text);
    margin-bottom: 12px;
    font-weight: 700;
}

.wr-empty-state p {
    font-size: 15px;
    color: var(--text-secondary);
    max-width: 550px;
    margin: 0 auto 24px;
    line-height: 1.6;
}