/* Global Main CSS */
body {
    font-family: var(--font-main);
    color: var(--text-main);
    background-color: var(--bg-light);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Prevent flashing i18n keys before translations load */
html.i18n-loading [data-i18n],
html.i18n-loading [data-i18n-html] {
    visibility: hidden;
}

body.no-scroll {
    overflow: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-main);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: var(--container-padding);
}

@media (max-width: 768px) {
    .container {
        padding: var(--container-padding-mobile);
    }
    
    .section {
        padding: var(--section-padding-mobile) !important;
    }

    .btn {
        width: 100%;
        margin-left: 0 !important;
        margin-right: 0 !important;
    }

    .btn + .btn {
        margin-top: 15px;
    }

    /* Fix for button groups that should stack */
    .gs-hero-actions, .instrument-actions, .calc-btns {
        flex-direction: column;
        gap: 15px;
    }

    h1 { font-size: 32px !important; }
    h2 { font-size: 28px !important; }
    h3 { font-size: 22px !important; }
}

/* Helper for responsive tables and widgets */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-top: 20px;
}

#header-placeholder {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    width: 100%;
    background-color: #000; /* Prevent transparency before load */
}

.section {
    padding: var(--section-padding);
}

.text-center { text-align: center; }
.mb-20 { margin-bottom: 20px; }
.mb-40 { margin-bottom: 40px; }
.mt-40 { margin-top: 40px; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 16px 32px;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 14px;
    border-radius: 4px;
    transition: var(--transition-fast);
    cursor: pointer;
    text-align: center;
    border: none;
    letter-spacing: 0.05em;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #000;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}