:root {
    color-scheme: light dark;
    --color-bg: #0f172a;
    --color-surface: rgba(15, 23, 42, 0.9);
    --color-surface-alt: rgba(56, 189, 248, 0.08);
    --color-text: #e2e8f0;
    --color-muted: #94a3b8;
    --color-accent: #38bdf8;
    --color-accent-strong: #0ea5e9;
    --color-success: #22c55e;
    --color-error: #f87171;
    --font-base: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-base);
    background: radial-gradient(circle at top, rgba(56, 189, 248, 0.12), transparent 65%), var(--color-bg);
    color: var(--color-text);
}

.page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding: 2rem 1.5rem;
    max-width: 960px;
    margin: 0 auto;
}

.page__header {
    text-align: center;
    margin-bottom: 2rem;
}

.page__header h1 {
    font-size: clamp(1.8rem, 2.5vw, 2.5rem);
    margin-bottom: 0.5rem;
}

.page__header p {
    color: var(--color-muted);
    margin: 0;
    font-size: 1rem;
}

.page__content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-form {
    width: min(100%, 540px);
}

.files-section {
    margin-top: 3rem;
    padding: 2rem 1.75rem;
    background: var(--color-surface);
    border-radius: 18px;
    box-shadow: 0 10px 40px rgba(15, 23, 42, 0.35);
    backdrop-filter: blur(8px);
}

.files-section__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.files-section__header h2 {
    margin: 0;
    font-size: 1.3rem;
}

.link-button {
    background: transparent;
    border: none;
    color: var(--color-accent);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 8px;
    transition: color 0.2s ease, background 0.2s ease;
}

.link-button:hover,
.link-button:focus-visible {
    color: var(--color-accent-strong);
    background: rgba(56, 189, 248, 0.12);
    outline: none;
}

.files-table-wrapper {
    position: relative;
    overflow-x: auto;
}

.files-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 100%;
}

.files-table thead {
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    color: var(--color-muted);
}

.files-table th,
.files-table td {
    text-align: left;
    padding: 0.9rem 0.75rem;
    border-bottom: 1px solid rgba(148, 163, 184, 0.16);
}

.files-table__actions-col,
.files-table td:last-child {
    text-align: right;
    width: 1%;
    white-space: nowrap;
}

.files-actions {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
}

.files-table tbody tr:hover {
    background: rgba(148, 163, 184, 0.08);
}

.files-empty {
    margin: 1.5rem 0 0;
    text-align: center;
    color: var(--color-muted);
    font-size: 0.95rem;
}

.copy-button {
    background: transparent;
    border: 1px solid rgba(148, 163, 184, 0.4);
    border-radius: 999px;
    color: var(--color-accent);
    padding: 0.35rem 0.9rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.copy-button:hover,
.copy-button:focus-visible {
    border-color: var(--color-accent-strong);
    color: var(--color-accent-strong);
    outline: none;
    transform: translateY(-1px);
}

.copy-button--copied {
    border-color: var(--color-success);
    color: var(--color-success);
}

.delete-button {
    background: transparent;
    border: 1px solid rgba(248, 113, 113, 0.5);
    border-radius: 999px;
    color: var(--color-error);
    padding: 0.35rem 0.9rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.delete-button:hover,
.delete-button:focus-visible {
    border-color: rgba(248, 113, 113, 0.9);
    color: rgba(248, 113, 113, 0.95);
    outline: none;
    transform: translateY(-1px);
}

.not-found {
    max-width: 520px;
    margin: 0 auto;
    text-align: center;
    padding: 2.5rem 2rem;
    background: var(--color-surface);
    border-radius: 18px;
    box-shadow: 0 14px 50px rgba(15, 23, 42, 0.45);
}

.not-found h1 {
    margin-top: 0;
    font-size: clamp(1.8rem, 2.5vw, 2.6rem);
}

.not-found p {
    color: var(--color-muted);
    font-size: 1rem;
}

.drop-zone {
    position: relative;
    border: 2px dashed rgba(148, 163, 184, 0.5);
    border-radius: 18px;
    padding: 3rem 2rem;
    background: var(--color-surface);
    backdrop-filter: blur(10px);
    text-align: center;
    transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
    cursor: pointer;
}

.drop-zone svg {
    fill: var(--color-accent);
    margin-bottom: 1rem;
}

.drop-zone__title {
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
}

.drop-zone__subtitle {
    margin: 0.25rem 0 1.5rem;
    color: var(--color-muted);
}

.drop-zone__hint {
    margin-top: 1rem;
    color: var(--color-muted);
    font-size: 0.95rem;
}

.drop-zone--active {
    border-color: var(--color-accent-strong);
    background: var(--color-surface-alt);
    transform: translateY(-2px);
}

.button {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-strong));
    border: none;
    border-radius: 999px;
    padding: 0.75rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    color: #0f172a;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
}

.button:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 30px rgba(14, 165, 233, 0.25);
}

progress {
    width: 100%;
    height: 12px;
    border-radius: 999px;
    margin-top: 1.5rem;
    appearance: none;
    color: var(--color-accent);
    background-color: rgba(148, 163, 184, 0.2);
    overflow: hidden;
}

progress::-webkit-progress-bar {
    background-color: rgba(148, 163, 184, 0.2);
    border-radius: 999px;
}

progress::-webkit-progress-value {
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-strong));
    border-radius: 999px;
}

progress::-moz-progress-bar {
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-strong));
    border-radius: 999px;
}

.status {
    margin-top: 1rem;
    min-height: 1.5rem;
    font-size: 0.95rem;
}

.status--success {
    color: var(--color-success);
}

.status--error {
    color: var(--color-error);
}

.page__footer {
    text-align: center;
    margin-top: 2rem;
    color: var(--color-muted);
    font-size: 0.85rem;
}

@media (max-width: 600px) {
    .page {
        padding: 1.5rem 1rem;
    }

    .drop-zone {
        padding: 2.5rem 1.5rem;
    }

    .files-section {
        padding: 1.5rem 1.25rem;
    }
}