/*
================================================
SMART CLASSROOM - INTERACTIVE SIMULATORS STYLES
Modern Flexbox Grid, Category Filters, Responsive Lab Cards
================================================
*/

/* --- Hero Section & Header --- */
.simulators-main {
    padding-top: 1rem;
    padding-bottom: 4rem;
}

.simulators-hero {
    text-align: center;
    max-width: 960px;
    margin: 0 auto 1.5rem;
    opacity: 1 !important;
    transform: none !important;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(79, 70, 229, 0.2);
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    letter-spacing: 0.02em;
}

.simulators-hero h1 {
    font-size: 2.1rem;
    font-weight: 800;
    margin-bottom: 0.4rem;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.hero-subtext {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 1.25rem;
}

/* --- Search Box Elevated --- */
.search-filter-wrapper {
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
}

.search-box-elevated {
    position: relative;
    width: 100%;
    max-width: 640px;
    display: flex;
    align-items: center;
}

.search-box-elevated .search-icon {
    position: absolute;
    left: 16px;
    color: var(--text-muted);
    font-size: 1rem;
    pointer-events: none;
}

.search-box-elevated input {
    width: 100%;
    padding: 11px 42px 11px 44px;
    font-size: 0.95rem;
    font-family: var(--font-body);
    color: var(--text-main);
    background: var(--bg-surface);
    border: 2px solid var(--border-color);
    border-radius: 9999px;
    outline: none;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.search-box-elevated input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15), 0 4px 12px rgba(0, 0, 0, 0.05);
}

.search-clear {
    position: absolute;
    right: 12px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--bg-subtle);
    border: none;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.8rem;
    transition: var(--transition);
}

.search-clear:hover {
    background: var(--border-color);
    color: var(--text-main);
}

/* --- Filter Controls --- */
.filter-controls-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 0.9rem 1.25rem;
    margin-bottom: 0.9rem;
    box-shadow: var(--shadow-sm);
}

.filter-group {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.filter-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-main);
    display: inline-flex;
    align-items: center;
    gap: 5px;
    min-width: 85px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.filter-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    flex: 1;
}

/* Main Category Filter Pills */
.filter-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 0.84rem;
    font-weight: 600;
    font-family: var(--font-body);
    color: var(--text-muted);
    background: var(--bg-subtle);
    border: 1px solid transparent;
    border-radius: 9999px;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.filter-pill:hover {
    color: var(--text-main);
    background: var(--border-color);
    transform: translateY(-1px);
}

.filter-pill.active {
    background: var(--primary-color);
    color: #ffffff;
    border-color: var(--primary-color);
    box-shadow: 0 3px 8px rgba(79, 70, 229, 0.25);
}

.filter-pill .pill-count {
    display: inline-block;
    padding: 1px 6px;
    border-radius: 9999px;
    font-size: 0.72rem;
    background: rgba(0, 0, 0, 0.08);
    font-weight: 700;
}

.filter-pill.active .pill-count {
    background: rgba(255, 255, 255, 0.25);
    color: #ffffff;
}

/* Secondary Source Pills */
.filter-pill-sm {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    font-size: 0.78rem;
    font-weight: 500;
    font-family: var(--font-body);
    color: var(--text-muted);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.filter-pill-sm:hover {
    border-color: var(--primary-color);
    color: var(--text-main);
}

.filter-pill-sm.active {
    background: var(--bg-subtle);
    border-color: var(--primary-color);
    color: var(--primary-color);
    font-weight: 700;
}

/* --- Results Summary Bar --- */
.results-meta-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.25rem 0.25rem 0.6rem;
    font-size: 0.88rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.25rem;
}

.results-count-text span {
    font-weight: 700;
    color: var(--text-main);
}

.reset-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 9px;
    font-size: 0.78rem;
    font-weight: 600;
    color: #ef4444;
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.reset-btn:hover {
    background: rgba(239, 68, 68, 0.16);
}

/* Container Guarantee */
.simulators-flex-container {
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
    transform: none !important;
}

/* --- Category Sections --- */
.category-section {
    margin-bottom: 3.5rem;
}

.category-header-wrap {
    margin-bottom: 1.5rem;
}

.category-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    position: relative;
    padding-bottom: 0.5rem;
}

.category-title i {
    color: var(--primary-color);
}

.category-count {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
}

/* --- Responsive Flexbox Simulator Grid --- */
.simulators-flex-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin: 0 -12px;
}

/* Simulator Card */
.simulator-card {
    flex: 1 1 calc(33.333% - 24px);
    min-width: 320px;
    max-width: 100%;
    margin: 0;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    box-sizing: border-box;
}

.simulator-card:hover {
    transform: translateY(-4px);
    border-color: rgba(79, 70, 229, 0.4);
    box-shadow: 0 12px 24px -4px rgba(0, 0, 0, 0.08), 0 4px 8px -2px rgba(0, 0, 0, 0.04);
}

/* Card Header */
.card-header {
    padding: 1rem 1.25rem 0.75rem;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
}

.card-header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.source-badge {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 2px 8px;
    border-radius: 4px;
}

.source-phet {
    background: rgba(14, 165, 233, 0.12);
    color: #0284c7;
    border: 1px solid rgba(14, 165, 233, 0.25);
}

.source-geogebra {
    background: rgba(16, 185, 129, 0.12);
    color: #059669;
    border: 1px solid rgba(16, 185, 129, 0.25);
}

.source-concord {
    background: rgba(245, 158, 11, 0.12);
    color: #d97706;
    border: 1px solid rgba(245, 158, 11, 0.25);
}

.source-custom {
    background: rgba(139, 92, 246, 0.12);
    color: #7c3aed;
    border: 1px solid rgba(139, 92, 246, 0.25);
}

.card-controls {
    display: flex;
    align-items: center;
    gap: 6px;
}

.card-action-btn {
    background: var(--bg-subtle);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    width: 30px;
    height: 30px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.85rem;
    transition: var(--transition);
    text-decoration: none;
}

.card-action-btn:hover {
    color: var(--primary-color);
    background: rgba(79, 70, 229, 0.1);
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.card-title {
    font-size: 1.08rem;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.35;
    margin: 0;
}

/* Simulation Viewport Container */
.sim-container {
    width: 100%;
    height: 260px;
    background: #0f172a;
    position: relative;
    overflow: hidden;
}

.sim-container iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
    background: #ffffff;
}

/* Loading Indicator */
.loading-indicator {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #0f172a;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: #94a3b8;
    font-size: 0.85rem;
    z-index: 10;
}

.spinner-ring-small {
    width: 28px;
    height: 28px;
    border: 3px solid rgba(255, 255, 255, 0.15);
    border-top-color: #6366f1;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Card Body & Tags */
.card-body {
    padding: 1rem 1.25rem 1.25rem;
    display: flex;
    flex-direction: column;
    flex: 1;
    justify-content: space-between;
    background: var(--bg-surface);
}

.card-description {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin: 0 0 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.sim-tag {
    font-size: 0.74rem;
    padding: 2px 7px;
    background: var(--bg-subtle);
    color: var(--text-muted);
    border-radius: 4px;
    font-weight: 500;
}

/* Fullscreen Mode (Native) */
.sim-container:fullscreen,
.sim-container:-webkit-full-screen {
    width: 100vw !important;
    height: 100vh !important;
    background: #000000;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2147483647;
}

.close-fs-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(15, 23, 42, 0.85);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    z-index: 2147483647;
    display: none;
    backdrop-filter: blur(8px);
    transition: var(--transition);
}

.close-fs-btn:hover {
    background: #ef4444;
    border-color: #ef4444;
}

.sim-container:fullscreen .close-fs-btn,
.sim-container:-webkit-full-screen .close-fs-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* Empty State */
.empty-results-box {
    text-align: center;
    padding: 4rem 1.5rem;
    background: var(--bg-surface);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    margin: 2rem 0;
}

.empty-icon {
    font-size: 3rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    opacity: 0.6;
}

.empty-results-box h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.empty-results-box p {
    color: var(--text-muted);
    max-width: 480px;
    margin: 0 auto 1.5rem;
}

/* Page Loader State */
.sim-loading-state {
    text-align: center;
    padding: 5rem 1rem;
    color: var(--text-muted);
}

.spinner-ring {
    width: 44px;
    height: 44px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    margin: 0 auto 1.25rem;
    animation: spin 0.8s linear infinite;
}

/* --- Dark Theme Specific Tweaks --- */
body.dark-theme .search-box-elevated input {
    background: var(--bg-surface);
    border-color: var(--border-color);
    color: var(--text-main);
}

body.dark-theme .filter-controls-container {
    background: var(--bg-surface);
    border-color: var(--border-color);
}

body.dark-theme .filter-pill {
    background: var(--bg-subtle);
    color: var(--text-muted);
}

body.dark-theme .filter-pill.active {
    background: var(--primary-color);
    color: #ffffff;
}

body.dark-theme .simulator-card {
    background: var(--bg-surface);
    border-color: var(--border-color);
}

body.dark-theme .simulator-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
}

body.dark-theme .card-header,
body.dark-theme .card-body {
    background: var(--bg-surface);
}

body.dark-theme .source-phet {
    background: rgba(14, 165, 233, 0.2);
    color: #38bdf8;
    border-color: rgba(56, 189, 248, 0.3);
}

body.dark-theme .source-geogebra {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
    border-color: rgba(52, 211, 153, 0.3);
}

body.dark-theme .source-concord {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
    border-color: rgba(251, 191, 36, 0.3);
}

body.dark-theme .source-custom {
    background: rgba(139, 92, 246, 0.2);
    color: #a78bfa;
    border-color: rgba(167, 139, 250, 0.3);
}

/* --- Media Queries / Responsive Breakpoints --- */
@media (max-width: 1100px) {
    .simulator-card {
        flex: 1 1 calc(50% - 24px);
    }
}

@media (max-width: 768px) {
    .simulators-hero h1 {
        font-size: 1.85rem;
    }

    .hero-subtext {
        font-size: 0.95rem;
    }

    .filter-controls-container {
        padding: 1rem;
    }

    .filter-group {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .filter-label {
        min-width: unset;
    }

    .simulators-flex-grid {
        margin: 0;
        gap: 20px;
    }

    .simulator-card {
        flex: 1 1 100%;
        min-width: 100%;
    }

    .sim-container {
        height: 240px;
    }
}