:root {
    color-scheme: light;
    --ink: #1d2b3a;
    --muted: #78889a;
    --blue: #477df4;
    --blue-dark: #3264d3;
    --line: rgba(91, 119, 160, 0.13);
    --panel: rgba(255, 255, 255, 0.76);
}

* {
    box-sizing: border-box;
}

html {
    min-width: 320px;
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    margin: 0;
    padding: 22px;
    color: var(--ink);
    font-family: "SF Pro Display", "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: #e7edf7;
    overflow-x: hidden;
}

body::before {
    position: fixed;
    z-index: 0;
    inset: 0;
    content: "";
    background: #e7edf7 url("../assets/bg.webp") center / cover no-repeat;
    filter: blur(5px);
    transform: scale(1.05);
    pointer-events: none;
}

.software-shell {
    position: relative;
    z-index: 1;
    width: min(100%, 1160px);
    margin: 0 auto;
}

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

button,
input {
    font: inherit;
}

.glass-nav {
    position: sticky;
    z-index: 3;
    top: 16px;
    display: flex;
    min-height: 60px;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px 10px 22px;
    border: 1px solid rgba(255, 255, 255, 0.55);
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.48);
    box-shadow: 0 12px 34px rgba(53, 78, 118, 0.1), inset 0 1px rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(18px) saturate(150%);
    -webkit-backdrop-filter: blur(18px) saturate(150%);
}

.brand {
    color: #233750;
    font-size: 0.92rem;
    font-weight: 750;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 7px;
}

.nav-link {
    display: inline-flex;
    min-height: 36px;
    align-items: center;
    padding: 0 15px;
    border: 1px solid transparent;
    border-radius: 13px;
    color: #52657e;
    font-size: 0.84rem;
    transition: background 0.2s ease, color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
    border-color: rgba(71, 125, 244, 0.12);
    color: var(--blue-dark);
    background: rgba(255, 255, 255, 0.68);
}

.nav-link:focus-visible {
    outline: 3px solid rgba(71, 125, 244, 0.38);
    outline-offset: 2px;
}

.hero {
    max-width: 760px;
    margin: clamp(56px, 9vw, 94px) auto 48px;
    text-align: center;
    animation: rise-in 0.65s ease both;
}

.eyebrow,
.panel-label {
    margin: 0;
    color: #6684b1;
    font-size: 0.68rem;
    font-weight: 750;
    letter-spacing: 0.17em;
}

.hero h1 {
    margin: 12px 0 0;
    color: #1e3049;
    font-size: clamp(2.35rem, 7vw, 4.35rem);
    font-weight: 760;
    letter-spacing: -0.065em;
    line-height: 1.08;
}

.title-period {
    color: var(--blue);
}

.hero-description {
    max-width: 560px;
    margin: 17px auto 28px;
    color: #718198;
    font-size: 0.96rem;
    line-height: 1.8;
}

.search-box {
    display: flex;
    width: min(100%, 560px);
    min-height: 58px;
    align-items: center;
    gap: 13px;
    margin: 0 auto;
    padding: 0 16px 0 19px;
    border: 1px solid rgba(255, 255, 255, 0.82);
    border-radius: 17px;
    background: rgba(255, 255, 255, 0.74);
    box-shadow: 0 14px 36px rgba(53, 78, 118, 0.1), inset 0 1px rgba(255, 255, 255, 0.9);
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.search-box:focus-within {
    border-color: rgba(71, 125, 244, 0.46);
    box-shadow: 0 14px 36px rgba(53, 78, 118, 0.12), 0 0 0 4px rgba(71, 125, 244, 0.1);
}

.search-icon {
    color: #7790b3;
    font-size: 1.65rem;
    line-height: 1;
    transform: rotate(-20deg);
}

.search-box input {
    width: 100%;
    min-width: 0;
    border: 0;
    outline: 0;
    color: var(--ink);
    background: transparent;
    font-size: 0.92rem;
}

.search-box input::placeholder {
    color: #99a6b8;
}

.search-box kbd {
    display: grid;
    width: 25px;
    height: 25px;
    flex: 0 0 auto;
    place-items: center;
    border: 1px solid #e3e9f1;
    border-radius: 7px;
    color: #8a9ab0;
    background: rgba(242, 246, 251, 0.8);
    font-size: 0.76rem;
}

.hero-meta {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 16px;
    color: #8290a4;
    font-size: 0.75rem;
}

.hero-meta span:first-child {
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

.meta-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #58bd89;
    box-shadow: 0 0 0 4px rgba(88, 189, 137, 0.13);
}

.catalog {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    align-items: start;
    gap: 20px;
}

.category-panel,
.results-panel {
    border: 1px solid rgba(255, 255, 255, 0.74);
    border-radius: 22px;
    background: var(--panel);
    box-shadow: 0 18px 48px rgba(53, 78, 118, 0.09), inset 0 1px rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(10px) saturate(140%);
    -webkit-backdrop-filter: blur(10px) saturate(140%);
}

.category-panel {
    position: sticky;
    top: 94px;
    padding: 22px 15px 15px;
}

.category-panel h2,
.results-heading h2 {
    margin: 7px 0 0;
    color: #293d57;
    font-size: 1.06rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.category-panel .panel-label,
.results-heading .panel-label {
    font-size: 0.6rem;
}

.category-list {
    display: grid;
    gap: 5px;
    margin-top: 18px;
}

.category-button {
    display: flex;
    min-height: 42px;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 0 11px;
    border: 1px solid transparent;
    border-radius: 11px;
    color: #68798f;
    background: transparent;
    cursor: pointer;
    font-size: 0.8rem;
    text-align: left;
    transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.category-button:hover {
    color: #355b9e;
    background: rgba(238, 244, 253, 0.76);
}

.category-button.active {
    border-color: rgba(71, 125, 244, 0.12);
    color: #3569d4;
    background: rgba(71, 125, 244, 0.09);
    font-weight: 650;
}

.category-count {
    color: #9aa8b9;
    font-size: 0.72rem;
    font-variant-numeric: tabular-nums;
}

.category-button.active .category-count {
    color: #5e83d1;
}

.license-note {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    margin-top: 20px;
    padding: 12px 10px;
    border: 1px solid rgba(93, 164, 129, 0.12);
    border-radius: 12px;
    background: rgba(233, 248, 239, 0.62);
}

.license-icon {
    display: grid;
    width: 18px;
    height: 18px;
    flex: 0 0 auto;
    place-items: center;
    border-radius: 50%;
    color: #fff;
    background: #53b985;
    font-size: 0.66rem;
    font-weight: 700;
}

.license-note p {
    margin: 0;
    color: #6d8d7a;
    font-size: 0.69rem;
    line-height: 1.65;
}

.results-panel {
    min-height: 500px;
    padding: 24px;
}

.results-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 12px;
    margin: 0 0 19px;
}

.results-heading h2 {
    margin-top: 6px;
    font-size: 1.2rem;
}

.sort-label {
    padding: 6px 9px;
    border: 1px solid var(--line);
    border-radius: 9px;
    color: #8190a3;
    font-size: 0.69rem;
    white-space: nowrap;
}

.software-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.software-card {
    display: flex;
    min-height: 205px;
    flex-direction: column;
    padding: 15px;
    border: 1px solid rgba(221, 229, 239, 0.86);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.65);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    animation: rise-in 0.45s ease both;
}

.software-card[hidden],
.empty-state[hidden] {
    display: none;
}

.software-card:hover {
    transform: translateY(-3px);
    border-color: rgba(71, 125, 244, 0.25);
    box-shadow: 0 12px 28px rgba(53, 78, 118, 0.1);
}

.card-top,
.card-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.app-icon {
    display: grid;
    width: 37px;
    height: 37px;
    flex: 0 0 auto;
    place-items: center;
    border: 1px solid rgba(75, 96, 130, 0.08);
    border-radius: 12px;
    color: #fff;
    background: #6882a9;
    box-shadow: inset 0 1px rgba(255, 255, 255, 0.24);
    font-size: 0.85rem;
    font-weight: 750;
    letter-spacing: -0.04em;
}

.icon-blender { background: linear-gradient(145deg, #f29540, #d95123); }
.icon-krita { background: linear-gradient(145deg, #4c5267, #292c3d); }
.icon-gimp { background: linear-gradient(145deg, #8ea158, #53662b); }
.icon-inkscape { background: linear-gradient(145deg, #6583b6, #344c7c); }
.icon-vscode { background: linear-gradient(145deg, #40a5e5, #2875c7); font-size: 0.7rem; }
.icon-python { background: linear-gradient(145deg, #4f87bd, #f2c550); }
.icon-git { background: linear-gradient(145deg, #f06b4d, #ca3e29); font-size: 0.75rem; }
.icon-godot { background: linear-gradient(145deg, #5da3eb, #4164bf); }
.icon-libre { background: linear-gradient(145deg, #4385bd, #28608e); }
.icon-office { background: linear-gradient(145deg, #ed754f, #be3b61); }
.icon-audacity { background: linear-gradient(145deg, #7884dd, #4c55a8); }
.icon-obs { background: linear-gradient(145deg, #47546b, #222b3b); font-size: 0.68rem; }
.icon-zip { background: linear-gradient(145deg, #d3a238, #93691b); }
.icon-jetbrains { background: linear-gradient(145deg, #695de5, #35349e); font-size: 0.72rem; }
.icon-autodesk { background: linear-gradient(145deg, #f06450, #a53034); font-size: 0.72rem; }

.card-category {
    color: #8a98ab;
    font-size: 0.65rem;
}

.software-card h3 {
    margin: 13px 0 5px;
    color: #2e4059;
    font-size: 0.91rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.software-card > p {
    margin: 0 0 14px;
    color: #7d8b9e;
    font-size: 0.74rem;
    line-height: 1.65;
}

.card-bottom {
    margin-top: auto;
    padding-top: 11px;
    border-top: 1px solid rgba(91, 119, 160, 0.1);
}

.license-tag {
    display: inline-flex;
    padding: 5px 7px;
    border-radius: 7px;
    color: #55876f;
    background: rgba(82, 183, 128, 0.1);
    font-size: 0.61rem;
    white-space: nowrap;
}

.education-tag {
    color: #5c76ad;
    background: rgba(89, 128, 213, 0.1);
}

.card-bottom a {
    color: #4977d6;
    font-size: 0.69rem;
    font-weight: 650;
    white-space: nowrap;
}

.card-bottom a:hover {
    color: #2857b3;
}

.empty-state {
    margin: 26px 0 10px;
    padding: 38px 16px;
    border: 1px dashed rgba(91, 119, 160, 0.24);
    border-radius: 14px;
    color: #7f8da0;
    font-size: 0.88rem;
    text-align: center;
}

.page-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 21px 5px 8px;
    color: #8390a2;
    font-size: 0.72rem;
    line-height: 1.6;
}

.page-footer p {
    margin: 0;
}

.page-footer a {
    flex: 0 0 auto;
    color: #597ab4;
    font-weight: 600;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    clip-path: inset(50%);
}

@keyframes rise-in {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 1000px) {
    .software-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 740px) {
    body {
        padding: 14px;
    }

    .glass-nav {
        top: 8px;
        min-height: 54px;
        flex-wrap: wrap;
        gap: 7px;
        padding: 9px 12px;
        border-radius: 18px;
    }

    .nav-links {
        width: 100%;
        overflow-x: auto;
        scrollbar-width: thin;
    }

    .nav-link {
        flex: 0 0 auto;
        min-height: 33px;
        padding: 0 11px;
        font-size: 0.76rem;
    }

    .hero {
        margin: 54px auto 30px;
    }

    .hero-description {
        max-width: 480px;
        font-size: 0.87rem;
    }

    .catalog {
        grid-template-columns: minmax(0, 1fr);
        gap: 13px;
    }

    .category-panel {
        position: static;
        padding: 17px 15px 13px;
    }

    .category-list {
        display: flex;
        gap: 7px;
        margin-top: 13px;
        overflow-x: auto;
        scrollbar-width: thin;
    }

    .category-button {
        min-height: 36px;
        flex: 0 0 auto;
        gap: 9px;
        padding: 0 10px;
        border-color: rgba(91, 119, 160, 0.1);
        background: rgba(255, 255, 255, 0.35);
        font-size: 0.73rem;
    }

    .license-note {
        margin-top: 13px;
        padding: 9px;
    }

    .results-panel {
        min-height: 0;
        padding: 18px 14px;
    }

    .software-grid {
        gap: 9px;
    }

    .software-card {
        min-height: 205px;
        padding: 12px;
    }

    .page-footer {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
    }
}

@media (max-width: 420px) {
    .software-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .software-card {
        min-height: 188px;
        padding: 15px;
    }

    .results-heading h2 {
        font-size: 1.05rem;
    }

    .hero-meta {
        gap: 14px;
        font-size: 0.69rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}