@media (max-width: 1024px) {
    :root {
        --container-width: 100%;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem 2.5rem;
    }
    .footer-col:first-child {
        grid-column: 1 / -1;
    }
    .how-steps {
        gap: 1rem;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 64px;
    }
    .container {
        padding: 0 1.1rem;
    }
    .header-inner {
        gap: 0.75rem;
    }
    .nav-toggle {
        display: inline-flex;
    }
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        padding: 0.75rem;
        box-shadow: var(--shadow-lg);
        transform: translateY(-120%);
        opacity: 0;
        pointer-events: none;
        transition: transform var(--transition-base), opacity var(--transition-base);
        z-index: 99;
        max-height: calc(100vh - var(--header-height));
        overflow-y: auto;
    }
    .nav-menu.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    .nav-menu li {
        width: 100%;
    }
    .nav-menu a {
        display: block;
        padding: 0.85rem 1rem;
        width: 100%;
        border-radius: var(--radius-md);
        font-size: 1rem;
    }
    .nav-toggle[aria-expanded='true'] span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    .nav-toggle[aria-expanded='true'] span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle[aria-expanded='true'] span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
    .hero {
        padding: 2rem 0 0.5rem;
    }
    .hero-features {
        gap: 0.5rem;
    }
    .feature-chip {
        font-size: 0.82rem;
        padding: 0.45rem 0.8rem;
    }

    .how-steps {
        grid-template-columns: 1fr;
    }
    .how-step {
        display: grid;
        grid-template-columns: auto 1fr;
        gap: 1rem;
        align-items: flex-start;
    }
    .step-number {
        margin-bottom: 0;
    }

    .converter-card {
        border-radius: var(--radius-lg);
        padding: 1rem;
    }
    .upload-zone {
        padding: 2rem 1rem;
        border-radius: var(--radius-md);
    }
    .upload-icon {
        width: 60px;
        height: 60px;
    }
    .upload-title {
        font-size: 1.05rem;
    }
    .btn-lg {
        width: 100%;
        padding: 0.85rem 1.25rem;
    }
    .convert-btn {
        min-width: unset;
    }

    .url-input-group {
        flex-direction: column;
    }
    .url-input-wrapper input {
        padding: 0.8rem 0;
    }
    #addUrlBtn {
        width: 100%;
    }

    .file-card {
        grid-template-columns: 64px 1fr auto;
        gap: 0.7rem;
        padding: 0.65rem;
    }
    .file-thumb {
        width: 64px;
        height: 64px;
    }
    .file-meta {
        font-size: 0.78rem;
        gap: 0.35rem;
    }
    .file-info {
        gap: 0.3rem;
    }
    .queue-header {
        align-items: flex-start;
    }
    .add-more-btn {
        width: 100%;
    }
    .global-output {
        flex-direction: column;
        align-items: flex-start;
    }
    .global-output .select-wrapper {
        width: 100%;
    }
    .global-output .select-wrapper select {
        width: 100%;
    }

    .converter-footer {
        align-items: stretch;
    }

    .formats-section,
    .how-section {
        padding: 2.5rem 0;
    }
    .section-head {
        margin-bottom: 1.75rem;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1.5rem;
    }
    .footer-col h3 {
        font-size: 0.82rem;
        margin-bottom: 0.75rem;
    }
    .footer-col a {
        font-size: 0.85rem;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        padding-top: 1.25rem;
    }
}

@media (max-width: 560px) {
    .formats-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.6rem;
    }
    .format-badge {
        padding: 0.8rem 0.9rem;
    }
    .hero-title {
        letter-spacing: -0.02em;
    }
    .file-card {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
    }
    .file-thumb {
        width: 100%;
        height: 160px;
        border-radius: var(--radius-sm);
    }
    .thumb-image {
        object-fit: contain;
    }
    .file-name-row {
        flex-direction: row;
    }
    .converter-footer {
        padding-top: 1rem;
    }
    .terms-label {
        font-size: 0.85rem;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }
    .footer-col {
        text-align: left;
    }
}

@media (max-width: 380px) {
    .btn {
        padding: 0.6rem 0.95rem;
        font-size: 0.9rem;
    }
    .upload-zone {
        padding: 1.75rem 0.85rem;
    }
    .feature-chip svg {
        display: none;
    }
}

@media (hover: none) and (pointer: coarse) {
    .btn:hover:not(:disabled) {
        transform: none;
    }
    .how-step:hover {
        transform: none;
        box-shadow: var(--shadow-md);
    }
    .file-card:hover {
        transform: none;
    }
    input[type='checkbox'] {
        min-height: 24px;
        min-width: 24px;
    }
    button,
    .btn,
    .btn-icon {
        min-height: 44px;
    }
    .btn-icon {
        min-width: 44px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .file-card,
    .url-import,
    .file-queue-section {
        animation: none !important;
    }
}