:root {
    --bg-color: #0b0f19;
    --text-primary: #f0f4f8;
    --text-secondary: #a0aec0;
    --accent-color: #00e5ff;
    --cat-core: #22d3ee;
    --cat-productivity: #a78bfa;
    --cat-micro: #2dd4bf;
    --cat-visual: #f59e0b;
    --cat-lab: #ec4899;
    --category-color: var(--accent-color);
    --category-bg: rgba(0, 229, 255, 0.1);
    --category-border: rgba(0, 229, 255, 0.28);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-hover: rgba(255, 255, 255, 0.1);
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

* {
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
}

.faq-top-link {
    position: fixed;
    top: 24px;
    right: 24px;
    left: auto;
    z-index: 1000;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-height: 46px;
    padding: 12px 18px;
    border: 1px solid rgba(0, 229, 255, 0.55);
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(0, 229, 255, 0.22), rgba(138, 43, 226, 0.22));
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 800;
    box-shadow: 0 14px 34px rgba(0, 0, 0, 0.34), 0 0 22px rgba(0, 229, 255, 0.14);
    transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.faq-top-link i {
    color: var(--accent-color);
}

.faq-top-link:hover {
    transform: translateY(-2px);
    border-color: var(--accent-color);
    background: linear-gradient(135deg, rgba(0, 229, 255, 0.32), rgba(138, 43, 226, 0.3));
}

.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background: radial-gradient(circle at 50% 50%, #1a1f2e 0%, #0b0f19 100%);
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
    animation: move 20s infinite alternate;
}

.blob-1 {
    width: 500px;
    height: 500px;
    background: var(--accent-color);
    top: -100px;
    right: -100px;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: #8a2be2;
    bottom: -100px;
    left: -100px;
    animation-delay: -5s;
}

@keyframes move {
    from { transform: translate(0, 0) scale(1); }
    to { transform: translate(50px, 50px) scale(1.1); }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 20px;
}

header {
    text-align: center;
    margin-bottom: 80px;
}

.logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 10px;
}

.logo-icon {
    font-size: 3rem;
    color: var(--accent-color);
    filter: drop-shadow(0 0 10px rgba(0, 229, 255, 0.5));
}

header h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 3.5rem;
    margin: 0;
    font-weight: 800;
    letter-spacing: -1px;
}

.highlight {
    background: linear-gradient(to right, #00e5ff, #8a2be2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
    font-weight: 300;
}

.module-group {
    margin-bottom: 60px;
    --category-color: var(--accent-color);
    --category-bg: rgba(0, 229, 255, 0.1);
    --category-border: rgba(0, 229, 255, 0.28);
}

.cat-core {
    --category-color: var(--cat-core);
    --category-bg: rgba(34, 211, 238, 0.11);
    --category-border: rgba(34, 211, 238, 0.34);
}

.cat-productivity {
    --category-color: var(--cat-productivity);
    --category-bg: rgba(167, 139, 250, 0.12);
    --category-border: rgba(167, 139, 250, 0.34);
}

.cat-micro {
    --category-color: var(--cat-micro);
    --category-bg: rgba(45, 212, 191, 0.11);
    --category-border: rgba(45, 212, 191, 0.32);
}

.cat-visual {
    --category-color: var(--cat-visual);
    --category-bg: rgba(245, 158, 11, 0.12);
    --category-border: rgba(245, 158, 11, 0.34);
}

.cat-lab {
    --category-color: var(--cat-lab);
    --category-bg: rgba(236, 72, 153, 0.12);
    --category-border: rgba(236, 72, 153, 0.34);
}

.section-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 12px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.section-title i {
    color: var(--category-color);
    filter: drop-shadow(0 0 10px color-mix(in srgb, var(--category-color) 35%, transparent));
}

.grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 25px;
}

.secondary-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

.card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 30px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.card:hover {
    transform: translateY(-8px);
    background: var(--glass-hover);
    border-color: var(--category-color);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.card-icon {
    font-size: 2.5rem;
    color: var(--category-color);
    background: var(--category-bg);
    border: 1px solid var(--category-border);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
}

.mini-card {
    flex-direction: row;
    align-items: center;
    padding: 20px;
    gap: 15px;
}

.mini-card .card-icon {
    width: 45px;
    height: 45px;
    font-size: 1.5rem;
}

.card-content h3 {
    margin: 0;
    font-family: 'Outfit', sans-serif;
    font-size: 1.4rem;
    margin-bottom: 8px;
}

.mini-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0;
}

.card-content p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.module-tag {
    display: inline-flex;
    width: fit-content;
    margin-top: 14px;
    padding: 6px 10px;
    border: 1px solid rgba(0, 229, 255, 0.28);
    border-color: var(--category-border);
    border-radius: 999px;
    background: rgba(0, 229, 255, 0.08);
    background: var(--category-bg);
    color: var(--category-color);
    font-size: 0.78rem;
    font-weight: 700;
    line-height: 1;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

footer {
    text-align: center;
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .faq-top-link {
        top: 14px;
        right: 14px;
        min-height: 38px;
        padding: 8px 12px;
    }

    header h1 { font-size: 2.5rem; }
    .grid-layout { grid-template-columns: 1fr; }
}