:root {
    color-scheme: dark;
    --bg: #020b1a;
    --bg-alt: #04142d;
    --panel: rgba(10, 27, 56, 0.85);
    --panel-border: rgba(148, 163, 184, 0.12);
    --accent: #f472b6;
    --accent-strong: #ec4899;
    --text: #f8fafc;
    --muted: #94a3b8;
    --highlight: rgba(236, 72, 153, 0.15);
    --radius: 22px;
    --shadow: 0 35px 60px -15px rgba(15, 23, 42, 0.45);
}

* {
    box-sizing: border-box;
    font-family: 'Montserrat', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body {
    margin: 0;
    padding: 2rem;
    min-height: 100vh;
    background: linear-gradient(135deg, #050b1a 0%, #0f1b34 100%);
    color: var(--text);
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        radial-gradient(1px 1px at 10px 15px, rgba(244, 114, 182, 0.32), transparent),
        radial-gradient(1px 1px at 120px 140px, rgba(125, 211, 252, 0.28), transparent),
        radial-gradient(2px 2px at 90px 210px, rgba(148, 163, 184, 0.22), transparent);
    background-size: 180px 180px, 240px 240px, 260px 260px;
    opacity: 0.32;
    pointer-events: none;
    z-index: -1;
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    background: radial-gradient(circle at 15% 25%, rgba(236, 72, 153, 0.08), transparent 55%),
        radial-gradient(circle at 85% 35%, rgba(59, 130, 246, 0.08), transparent 55%);
    opacity: 0.75;
    pointer-events: none;
    z-index: -2;
}
.hidden {
    display: none !important;
}

.app {
    max-width: 1440px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.app__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    background: linear-gradient(120deg, rgba(236, 72, 153, 0.2), rgba(59, 130, 246, 0.18));
    border: 1px solid rgba(236, 72, 153, 0.3);
    padding: 2.2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.header-content {
    flex: 1 1 360px;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.header-eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: rgba(244, 114, 182, 0.7);
}

.app__header h1 {
    margin: 0 0 0.45rem 0;
    font-size: 1.9rem;
}

.subtitle {
    margin: 0;
    color: var(--muted);
    font-size: 0.98rem;
    max-width: 620px;
}

.header-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.meta-chip {
    padding: 0.45rem 0.85rem;
    border-radius: 999px;
    border: 1px solid rgba(236, 72, 153, 0.35);
    background: rgba(236, 72, 153, 0.12);
    display: flex;
    gap: 0.4rem;
    align-items: baseline;
}

.meta-chip__label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(248, 187, 208, 0.75);
}

.meta-chip__value {
    font-weight: 600;
    color: var(--text);
}

.header-actions {
    display: flex;
    flex-wrap: wrap;
}

.link-back {
    color: var(--text);
    text-decoration: none;
    padding: 0.65rem 1.25rem;
    border-radius: calc(var(--radius) / 1.6);
    border: 1px solid rgba(148, 163, 184, 0.35);
    transition: all 0.2s ease;
}

.link-back:hover {
    background: rgba(148, 163, 184, 0.15);
}

.header-visual {
    flex: 1 1 240px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.orbit {
    position: relative;
    width: 240px;
    height: 240px;
}

.orbit__planet {
    position: absolute;
    inset: 50%;
    width: 34px;
    height: 34px;
    background: linear-gradient(135deg, #f472b6, #ec4899);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 22px rgba(236, 72, 153, 0.6);
}

.orbit__ring {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 1px dashed rgba(244, 114, 182, 0.35);
}

.orbit__ring--one {
    transform: rotate(10deg);
}

.orbit__ring--two {
    transform: scale(0.62) rotate(-16deg);
}

.info-strip {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.4rem;
}

.info-strip--compact {
    margin-top: 0.5rem;
}

.info-card {
    background: rgba(10, 24, 48, 0.82);
    border-radius: var(--radius);
    padding: 1.4rem;
    border: 1px solid rgba(148, 163, 184, 0.18);
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.info-card__eyebrow {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: rgba(244, 114, 182, 0.7);
}

.info-card__title {
    margin: 0;
    font-size: 1.2rem;
}

.info-card__copy {
    margin: 0;
    color: rgba(203, 213, 225, 0.85);
    line-height: 1.6;
}

.info-card__link {
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
}

.info-card__link:hover {
    text-decoration: underline;
}

.layout {
    display: grid;
    grid-template-columns: minmax(280px, 320px) 1fr minmax(260px, 320px);
    gap: 1.5rem;
}

.panel {
    background: var(--panel);
    border-radius: var(--radius);
    padding: 1.5rem;
    border: 1px solid var(--panel-border);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.panel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.panel__header h2 {
    margin: 0;
    font-size: 1.35rem;
}

.btn {
    border: none;
    border-radius: calc(var(--radius) / 1.8);
    padding: 0.65rem 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn--primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #0f172a;
    box-shadow: 0 20px 35px rgba(236, 72, 153, 0.35);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 25px 40px rgba(236, 72, 153, 0.45);
}

.btn--ghost {
    background: rgba(148, 163, 184, 0.08);
    color: var(--text);
    border: 1px solid rgba(148, 163, 184, 0.28);
}

.btn--ghost:hover {
    background: rgba(148, 163, 184, 0.18);
}

.btn--ghost.is-active {
    background: rgba(244, 114, 182, 0.2);
    border-color: rgba(244, 114, 182, 0.45);
    color: #ffe4f3;
}

.btn--favorite {
    width: 100%;
    margin-top: 1rem;
    background: rgba(236, 72, 153, 0.15);
    border: 1px solid rgba(236, 72, 153, 0.35);
    color: var(--text);
    padding: 0.75rem 1.1rem;
}

.btn--favorite:hover {
    background: rgba(236, 72, 153, 0.25);
}

.btn--favorite.is-active {
    background: rgba(248, 113, 113, 0.2);
    border-color: rgba(248, 113, 113, 0.5);
    color: #fee2e2;
}

.btn--link {
    align-self: flex-start;
    background: none;
    color: var(--accent);
    padding: 0;
    border: none;
    text-decoration: none;
}

.btn--link:hover {
    text-decoration: underline;
}

.btn--link[aria-disabled="true"] {
    pointer-events: none;
    opacity: 0.5;
}

.filters-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.filters-columns {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.filters-column {
    flex: 1 1 320px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.field-inline {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.filters-panel__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.filters-panel__eyebrow {
    display: inline-block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: rgba(244, 114, 182, 0.7);
}

.filters-panel__header h2 {
    margin: 0.25rem 0;
}

.filters-panel__description {
    margin: 0;
    color: rgba(200, 210, 230, 0.82);
}

.filters-panel__actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.filters-panel__actions {
    display: flex;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.field span {
    font-weight: 600;
    font-size: 0.95rem;
}

.field input,
.field select {
    padding: 0.65rem 0.75rem;
    border-radius: calc(var(--radius) / 2);
    border: 1px solid rgba(148, 163, 184, 0.25);
    background: rgba(15, 23, 42, 0.8);
    color: var(--text);
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field input:focus,
.field select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(236, 72, 153, 0.25);
    outline: none;
}

.range-field {
    display: flex;
    align-items: center;
    gap: 0.9rem;
}

.range-field output {
    min-width: 2.25rem;
    text-align: right;
    color: var(--accent);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.field.full-row {
    grid-column: 1 / -1;
}

.actions {
    display: flex;
    justify-content: flex-end;
}

.filters-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: flex-end;
    margin-top: 0.25rem;
}

.filters-actions button[type="reset"] {
    order: 3;
}

.favorites-count {
    color: var(--muted);
    font-weight: 600;
    margin-right: auto;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin: 0;
}

.stats div {
    background: rgba(148, 163, 184, 0.08);
    border-radius: calc(var(--radius) / 2);
    padding: 0.85rem;
    border: 1px solid rgba(148, 163, 184, 0.2);
}

.stats dt {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    margin-bottom: 0.25rem;
}

.stats dd {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 700;
}

.status {
    min-height: 1.2rem;
    color: var(--muted);
    font-size: 0.95rem;
}

.status--error {
    color: #f87171;
}

.panel--list {
    min-height: 420px;
}

.list-feedback {
    color: var(--muted);
}

.article-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    max-height: 82vh;
    min-height: 55vh;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.article-card {
    position: relative;
    padding: 1rem;
    border-radius: calc(var(--radius) / 1.8);
    border: 1px solid rgba(148, 163, 184, 0.2);
    background: rgba(4, 20, 45, 0.82);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.article-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 22px 35px rgba(15, 23, 42, 0.4);
}

.article-card.is-active {
    border-color: var(--accent);
    background: var(--highlight);
    box-shadow: 0 25px 40px rgba(236, 72, 153, 0.35);
}

.article-card.is-favorite {
    border-color: rgba(248, 113, 113, 0.65);
    box-shadow: 0 28px 45px rgba(248, 113, 113, 0.35);
}

.article-card__thumb {
    width: 100%;
    height: 140px;
    border-radius: calc(var(--radius) / 2);
    background: rgba(4, 20, 45, 0.8);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    margin-bottom: 0.65rem;
    transition: transform 0.2s ease;
}

.article-card:hover .article-card__thumb {
    transform: scale(1.02);
}

.article-card__source {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: rgba(148, 163, 184, 0.1);
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
}

.article-card__summary {
    margin: 0;
    color: rgba(226, 232, 240, 0.85);
    font-size: 0.95rem;
}

.article-card__time {
    font-size: 0.82rem;
    color: rgba(226, 232, 240, 0.65);
}

.article-card__favorite {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 38px;
    height: 38px;
    border-radius: 999px;
    background: rgba(4, 20, 45, 0.85);
    border: 1px solid rgba(148, 163, 184, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease, border-color 0.2s ease;
    z-index: 2;
    pointer-events: auto;
}

.article-card__favorite button {
    all: unset;
    cursor: pointer;
    font-size: 1.1rem;
    color: rgba(248, 250, 252, 0.7);
}

.article-card__favorite:hover {
    transform: scale(1.05);
    border-color: var(--accent);
}

.article-card.is-favorite .article-card__favorite button {
    color: #fecdd3;
}

.article-card__flag {
    align-self: flex-start;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    background: rgba(236, 72, 153, 0.18);
    color: var(--accent);
    font-weight: 700;
    font-size: 0.85rem;
}

.panel--detail {
    position: sticky;
    top: 1.5rem;
    min-height: 420px;
    background: linear-gradient(160deg, rgba(236, 72, 153, 0.08), rgba(59, 130, 246, 0.1));
    border: 1px solid rgba(236, 72, 153, 0.25);
}

.detail__empty {
    margin: 0;
    color: var(--muted);
}

.detail__card {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.detail__card .btn--link {
    margin-top: 0;
}

.detail__card header h3 {
    margin: 0 0 0.25rem;
    font-size: 1.4rem;
}

.detail__meta {
    margin: 0;
    color: var(--muted);
}

.detail__image {
    width: 100%;
    height: 200px;
    border-radius: calc(var(--radius) / 2);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-color: rgba(15, 23, 42, 0.8);
}

.detail__description {
    margin: 0;
    line-height: 1.6;
    color: rgba(241, 245, 249, 0.85);
}

.detail__authors {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin: 0.75rem 0 0;
    padding: 0;
}

.detail__authors li {
    background: rgba(148, 163, 184, 0.12);
    border-radius: 999px;
    padding: 0.3rem 0.7rem;
    font-size: 0.8rem;
}

.detail__facts {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.75rem;
    margin: 0;
    padding: 0;
}

.detail__facts li {
    background: rgba(148, 163, 184, 0.08);
    border-radius: calc(var(--radius) / 2);
    padding: 0.75rem;
}

.detail__facts span {
    display: block;
    color: var(--muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.25rem;
}

.detail__facts strong {
    font-size: 1.1rem;
}

::selection {
    background: rgba(244, 114, 182, 0.35);
    color: #0b1222;
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(4, 20, 45, 0.7);
    border-radius: 999px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, rgba(244, 114, 182, 0.55), rgba(59, 130, 246, 0.65));
    border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, rgba(244, 114, 182, 0.75), rgba(59, 130, 246, 0.85));
}

@media (max-width: 1080px) {
    body {
        padding: 1.5rem;
    }

    .layout {
        grid-template-columns: 1fr;
    }

    .panel--detail {
        position: static;
    }
}

@media (max-width: 640px) {
    .app__header {
        flex-direction: column;
        align-items: flex-start;
    }

    .link-back {
        align-self: stretch;
        text-align: center;
    }

    .filters-columns {
        flex-direction: column;
    }

    .field-inline {
        flex-direction: column;
    }

    .article-grid {
        grid-template-columns: 1fr;
    }
}