/*
 * USS Survey Theme - Responsive Styles
 * 移动端响应式样式
 */

/* ========== Large Tablets and Small Desktops (<= 1024px) ========== */
@media (max-width: 1024px) {
    .outerframe {
        max-width: 95%;
        padding: 0 20px;
    }
}

/* ========== Tablets (<= 768px) ========== */
@media (max-width: 768px) {
    body {
        padding-top: 52px;
    }

    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.35rem; }
    h3 { font-size: 1.15rem; }

    /* Navigation */
    #survey-nav {
        height: 52px;
        min-height: 52px;
    }

    #survey-nav .col-xl-8 {
        min-height: 52px;
    }

    #survey-nav .logo {
        max-height: 32px;
        max-width: 110px;
    }

    #survey-nav .site-title {
        font-size: 1rem;
    }

    #survey-nav .logo-link {
        gap: 8px;
    }

    .language-changer-inline {
        margin-right: 8px;
    }

    .language-changer-inline a,
    .language-changer-inline .btn {
        padding: 3px 8px;
        font-size: 0.8rem;
    }

    /* Question cards */
    .question-container {
        padding: 1.25rem;
        margin-bottom: 1rem;
    }

    .question-text {
        font-size: 1rem;
    }

    /* Navigator buttons */
    .navigator {
        padding: 1rem 0;
    }

    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 0.95rem;
    }

    /* Welcome page */
    .firstpage {
        padding: 1.5rem;
    }

    .firstpage .survey-title {
        font-size: 1.5rem;
    }

    /* Submit page */
    .submit {
        padding: 2rem 1.5rem;
    }

    /* Register form */
    .register-form {
        padding: 30px 0 !important;
    }

    /* Tables - horizontal scroll */
    .table-responsive {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

/* ========== Mobile (<= 576px) ========== */
@media (max-width: 576px) {
    body {
        line-height: 1.5;
        padding-top: 48px;
    }

    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1.1rem; }

    /* Navigation */
    #survey-nav {
        height: 48px;
        min-height: 48px;
    }

    #survey-nav .col-xl-8 {
        padding: 0 0.75rem;
        min-height: 48px;
    }

    #survey-nav .logo {
        max-height: 28px;
        max-width: 100px;
    }

    #survey-nav .site-title {
        font-size: 0.9rem;
    }

    #survey-nav .logo-link {
        gap: 6px;
    }

    #survey-nav .logo-container {
        padding: 0;
        margin: 0;
    }

    .language-changer-inline {
        margin-right: 6px;
        gap: 3px;
    }

    .language-changer-inline a,
    .language-changer-inline .btn {
        padding: 2px 6px;
        font-size: 0.75rem;
    }

    /* Main content */
    .outerframe {
        max-width: 100%;
        padding: 0 20px;
    }

    #outerframeContainer {
        padding-left: 20px !important;
        padding-right: 20px !important;
    }

    /* Question cards */
    .question-container {
        padding: 1rem;
        margin-bottom: 0.75rem;
        border-radius: var(--uss-radius-md);
    }

    .question-code {
        font-size: 0.7rem;
        padding: 0.2rem 0.5rem;
    }

    .question-text {
        font-size: 0.95rem;
    }

    /* Answer items */
    .answer-item {
        padding: 0.625rem 0.75rem;
        margin-bottom: 0.375rem;
    }

    .answer-item input[type="radio"],
    .answer-item input[type="checkbox"] {
        width: 16px;
        height: 16px;
        margin-right: 0.625rem;
    }

    /* Form inputs */
    input[type="text"],
    input[type="email"],
    input[type="number"],
    input[type="url"],
    input[type="tel"],
    textarea,
    select {
        padding: 0.625rem 0.75rem;
        font-size: 16px; /* Prevents zoom on iOS */
    }

    /* Navigator - full width buttons */
    .navigator {
        flex-direction: column;
        gap: 0.75rem;
    }

    .navigator > div {
        width: 100%;
        text-align: center !important;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .btn-lg {
        padding: 0.875rem 1rem;
    }

    /* Welcome page */
    .firstpage {
        padding: 1.25rem;
    }

    .firstpage .survey-title {
        font-size: 1.35rem;
    }

    .firstpage .survey-description,
    .firstpage .survey-welcome {
        font-size: 0.9rem;
    }

    /* Submit page */
    .submit {
        padding: 1.5rem 1rem;
    }

    /* Register form */
    .register-form {
        padding: 30px 0 !important;
    }

    /* Group title */
    .group-name h2 {
        font-size: 1.25rem;
        padding-bottom: 0.5rem;
    }

    .group-description {
        font-size: 0.875rem;
    }

    /* Progress bar */
    .topcontainer {
        padding: 0.75rem 0;
        margin-bottom: 0.75rem;
    }

    /* Language changer */
    .language-changer {
        flex-wrap: wrap;
    }

    .language-changer a {
        padding: 0.2rem 0.5rem;
        font-size: 0.8rem;
    }

    /* Footer */
    .footer {
        padding: 1rem 0;
        font-size: 0.8rem;
    }

    /* Table cells */
    table th,
    table td {
        padding: 0.5rem 0.625rem;
        font-size: 0.85rem;
    }

    /* Alerts */
    .alert {
        padding: 0.75rem;
        font-size: 0.85rem;
    }
}

/* ========== Very Small Screens (<= 360px) ========== */
@media (max-width: 360px) {
    .question-container {
        padding: 0.75rem;
    }

    .answer-item {
        padding: 0.5rem 0.625rem;
    }

    .btn-lg {
        padding: 0.75rem 0.875rem;
        font-size: 0.9rem;
    }
}

/* ========== Landscape Mobile ========== */
@media (max-height: 500px) and (orientation: landscape) {
    #survey-nav {
        height: 48px;
        min-height: 48px;
    }

    body {
        padding-top: 48px;
    }

    .question-container {
        padding: 1rem;
    }

    .navigator {
        padding: 0.75rem 0;
    }
}

/* ========== Print Styles ========== */
@media print {
    #survey-nav,
    .navigator,
    .footer,
    .topcontainer,
    .ls-progress-container {
        display: none !important;
    }

    body {
        background: white;
        color: black;
        font-size: 12pt;
    }

    .question-container {
        box-shadow: none;
        border: 1px solid #ccc;
        page-break-inside: avoid;
        margin-bottom: 1rem;
    }

    a {
        color: black;
        text-decoration: none;
    }
}