/* Silent H app card – site theme with own identity */
.silent-h-app {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 40px;
    max-width: 520px;
    margin: 0 auto 60px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}
.silent-h-app .app-header {
    text-align: center;
    margin-bottom: 32px;
}
.silent-h-app .app-logo {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 6px;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.silent-h-app .app-subtitle {
    font-size: 0.9375rem;
    color: #b8b8b8;
    font-weight: 400;
}
.silent-h-app .field-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: #b8b8b8;
    margin-bottom: 8px;
    display: block;
}
.silent-h-app .input-wrap {
    margin-bottom: 16px;
}
.silent-h-app input[type="text"] {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    font-size: 1rem;
    font-family: 'Nunito', sans-serif;
    color: #ffffff;
    background: rgba(255, 255, 255, 0.05);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}
.silent-h-app input[type="text"]::placeholder {
    color: #888;
}
.silent-h-app input[type="text"]:focus {
    border-color: #4ecdc4;
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 20px rgba(78, 205, 196, 0.3);
}
.silent-h-app .output-wrap {
    margin-bottom: 24px;
}
.silent-h-app .output-box {
    background: rgba(78, 205, 196, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 16px 18px;
    min-height: 56px;
    display: flex;
    align-items: center;
}
.silent-h-app .output-text {
    font-size: 1rem;
    color: #ffffff;
    font-weight: 500;
    word-break: break-word;
    line-height: 1.45;
}
.silent-h-app .output-text.placeholder {
    color: #888;
    font-weight: 400;
}
.silent-h-app .output-text.error {
    color: #ff6b6b;
    font-weight: 500;
}
.silent-h-app .actions {
    display: flex;
    gap: 10px;
    margin-bottom: 32px;
}
.silent-h-app .btn-primary {
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    color: #ffffff;
    border: none;
    box-shadow: none;
    padding: 12px 20px;
    border-radius: 10px;
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: 'Nunito', sans-serif;
    cursor: pointer;
    transition: all 0.3s ease;
}
.silent-h-app .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
}
.silent-h-app .btn-primary:active {
    transform: scale(0.98);
}
.silent-h-app .btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: #b8b8b8;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 12px 20px;
    border-radius: 10px;
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: 'Nunito', sans-serif;
    cursor: pointer;
    transition: all 0.3s ease;
}
.silent-h-app .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    border-color: rgba(78, 205, 196, 0.5);
}
.silent-h-app .examples-section,
.silent-h-app .about-section {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
}
.silent-h-app .about-section {
    margin-top: 24px;
}
.silent-h-app .examples-title,
.silent-h-app .about-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: #b8b8b8;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 14px;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.silent-h-app .example-row {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 12px;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9375rem;
}
.silent-h-app .example-row:last-child {
    border-bottom: none;
}
.silent-h-app .example-original {
    color: #b8b8b8;
    word-break: break-word;
}
.silent-h-app .example-arrow {
    color: rgba(255, 255, 255, 0.3);
    font-weight: 500;
    font-size: 0.875rem;
}
.silent-h-app .example-result {
    color: #ffffff;
    font-weight: 500;
    word-break: break-word;
    text-align: right;
}
.silent-h-app .about-text {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: #b8b8b8;
}
@media (max-width: 560px) {
    .silent-h-app {
        padding: 24px;
    }
    .silent-h-app .example-row {
        grid-template-columns: 1fr;
        gap: 4px;
        padding: 14px 0;
    }
    .silent-h-app .example-result {
        text-align: left;
    }
    .silent-h-app .example-arrow {
        display: none;
    }
}