:root {
    --primary: #00f2ff;
    --secondary: #7000ff;
    --bg: #0a0b0d;
    --text: #ffffff;
    --card-bg: rgba(255, 255, 255, 0.05);
    --border: rgba(255, 255, 255, 0.12);
}

body {
    margin: 0;
    font-family: 'Outfit', 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 100vh;
}

.blob {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--secondary), transparent 70%);
    filter: blur(100px);
    opacity: 0.15;
    z-index: -1;
    top: -200px;
}

.container {
    width: 92%;
    max-width: 840px;
    padding: 48px 24px;
    position: relative;
    z-index: 1;
}

.back-link {
    display: inline-block;
    color: var(--primary);
    text-decoration: none;
    margin-bottom: 24px;
    font-weight: 600;
}

.back-link:hover {
    text-decoration: underline;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 10px;
    text-align: center;
    background: linear-gradient(135deg, #fff 30%, var(--primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    text-align: center;
    color: #94a3b8;
    margin-top: 0;
    margin-bottom: 34px;
    font-size: 1.08rem;
    line-height: 1.5;
}

.app-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 36px;
    border-radius: 22px;
    display: flex;
    flex-direction: column;
    gap: 26px;
}

.action-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #000;
    font-weight: 700;
    border: none;
    padding: 16px 20px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    transition: transform 0.2s, box-shadow 0.2s;
    font-family: inherit;
    text-decoration: none;
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 242, 255, 0.4);
    color: #000;
}

.action-btn.secondary {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border: 1px solid var(--border);
}

.action-btn.secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 5px 20px rgba(255, 255, 255, 0.1);
    color: #fff;
}

.action-btn.disabled-btn {
    background: rgba(255, 255, 255, 0.04);
    color: #94a3b8;
    border: 1px dashed rgba(255, 255, 255, 0.2);
    cursor: default;
}

.action-btn.disabled-btn:hover {
    transform: none;
    box-shadow: none;
    color: #94a3b8;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
    margin: 12px 0;
}

.feature-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 24px 26px;
    border-radius: 16px;
}

.feature-item h3 {
    margin-top: 0;
    margin-bottom: 14px;
    font-size: 1.12rem;
    color: var(--primary);
    line-height: 1.35;
}

.feature-item p {
    margin: 0;
    font-size: 0.94rem;
    color: #cbd5e1;
    line-height: 1.65;
}

.help-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.help-list li {
    font-size: 0.95rem;
    color: #cbd5e1;
    line-height: 1.65;
    padding-left: 16px;
    border-left: 2px solid rgba(0, 242, 255, 0.35);
}

.guide-step {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 14px;
    background: rgba(255, 255, 255, 0.02);
    padding: 16px 20px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.step-num {
    background: var(--primary);
    color: #000;
    font-weight: 800;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.85rem;
}

.step-text {
    font-size: 0.95rem;
    color: #e2e8f0;
    line-height: 1.6;
}

.step-text code,
.help-list code {
    background: rgba(0, 0, 0, 0.45);
    padding: 2px 7px;
    border-radius: 5px;
    color: var(--primary);
    font-size: 0.86rem;
}

.credits-box {
    background: rgba(255, 255, 255, 0.025);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 24px 26px;
    font-size: 0.88rem;
    color: #94a3b8;
    line-height: 1.65;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.credits-box strong {
    color: #e2e8f0;
}