/* Premium interface system */
:root {
    --bg-color: #f5f1e8;
    --bg-soft: #fbfaf6;
    --panel-bg: #fffdf8;
    --panel-elevated: #ffffff;
    --text-color: #1a1d1f;
    --title-color: #101214;
    --muted-text: #687177;
    --line: rgba(27, 31, 35, 0.12);
    --line-strong: rgba(27, 31, 35, 0.18);
    --accent: #0f766e;
    --accent-strong: #0b5f59;
    --accent-warm: #b8832f;
    --accent-wine: #8a3432;
    --accent-ink: #18201f;
    --accent-shadow: rgba(15, 118, 110, 0.18);
    --card-shadow: rgba(22, 24, 27, 0.11);
    --header-height: 168px;
    --sticky-offset: 24px;
}

body.dark {
    --bg-color: #101312;
    --bg-soft: #151918;
    --panel-bg: #171b1a;
    --panel-elevated: #1d2220;
    --text-color: #e6e1d7;
    --title-color: #fbf6eb;
    --muted-text: #aaa598;
    --line: rgba(230, 225, 215, 0.13);
    --line-strong: rgba(230, 225, 215, 0.22);
    --accent: #59b6aa;
    --accent-strong: #7bd1c6;
    --accent-warm: #d8b36d;
    --accent-wine: #d17a73;
    --accent-ink: #0c100f;
    --accent-shadow: rgba(89, 182, 170, 0.18);
    --card-shadow: rgba(0, 0, 0, 0.38);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    color-scheme: light dark;
}

body {
    min-height: 100vh;
    min-height: -webkit-fill-available;
    overflow-x: hidden;
    color: var(--text-color);
    background:
        linear-gradient(180deg, rgba(24, 32, 31, 0.055) 0, rgba(24, 32, 31, 0) 260px),
        linear-gradient(135deg, #f0eadf 0%, #fbfaf6 42%, #edf4f1 100%);
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.55;
    letter-spacing: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-overflow-scrolling: touch;
}

body.dark {
    background:
        linear-gradient(180deg, rgba(216, 179, 109, 0.08) 0, rgba(216, 179, 109, 0) 280px),
        linear-gradient(135deg, #0d100f 0%, #151918 48%, #181512 100%);
}

a {
    color: inherit;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
    background:
        linear-gradient(135deg, #141716 0%, #20302e 54%, #4b3d25 100%);
    color: #f8f2e6;
    box-shadow: 0 18px 54px rgba(16, 18, 20, 0.18);
}

body.dark .header {
    border-bottom-color: rgba(230, 225, 215, 0.12);
    background:
        linear-gradient(135deg, #0c0f0e 0%, #14211f 56%, #2c2418 100%);
    box-shadow: 0 18px 54px rgba(0, 0, 0, 0.4);
}

.header-content {
    position: relative;
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: max(1.15rem, env(safe-area-inset-top)) 0 1rem;
}

.main-title {
    max-width: 760px;
    color: #fff9ec;
    font-size: clamp(1.65rem, 3.4vw, 3.1rem);
    font-weight: 780;
    line-height: 1.04;
    letter-spacing: 0;
}

.main-title,
.category-title,
.app-title {
    overflow-wrap: break-word;
    word-break: normal;
    hyphens: manual;
}

@supports (text-wrap: balance) {
    .main-title,
    .category-title,
    .app-title {
        text-wrap: balance;
    }
}

.subtitle {
    max-width: 640px;
    margin-top: 0.45rem;
    color: rgba(248, 242, 230, 0.78);
    font-size: 0.98rem;
    font-weight: 450;
}

.credits {
    max-width: 680px;
    margin-top: 0.35rem;
    color: rgba(248, 242, 230, 0.62);
    font-size: 0.76rem;
}

.credits a {
    color: #f4d493;
    text-decoration: none;
    border-bottom: 1px solid rgba(244, 212, 147, 0.38);
    transition: color 0.2s ease, border-color 0.2s ease;
}

.credits a:hover {
    color: #fff0c2;
    border-bottom-color: #fff0c2;
}

.language-toggle {
    position: absolute;
    top: max(1rem, env(safe-area-inset-top));
    right: 0;
    min-width: 78px;
    min-height: 36px;
    padding: 0.45rem 0.65rem;
    border: 1px solid rgba(248, 242, 230, 0.28);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.08);
    color: #fff9ec;
    font: inherit;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0;
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease;
}

.language-toggle:hover {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(248, 242, 230, 0.48);
}

.language-toggle:focus-visible {
    outline: 3px solid rgba(216, 179, 109, 0.45);
    outline-offset: 2px;
}

/* Filter Bar */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.45rem;
    margin-top: 1rem;
    padding: 0.45rem;
    border: 1px solid rgba(248, 242, 230, 0.16);
    border-radius: 8px;
    background: rgba(10, 13, 12, 0.24);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.chip {
    min-height: 34px;
    padding: 0.42rem 0.76rem;
    border: 1px solid rgba(248, 242, 230, 0.18);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.055);
    color: rgba(248, 242, 230, 0.84);
    font: inherit;
    font-size: 0.79rem;
    font-weight: 700;
    line-height: 1;
    letter-spacing: 0;
    cursor: pointer;
    transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
    -webkit-tap-highlight-color: transparent;
}

.chip:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(248, 242, 230, 0.32);
    color: #fff9ec;
}

.chip:focus-visible {
    outline: 3px solid rgba(216, 179, 109, 0.45);
    outline-offset: 2px;
}

.chip.active {
    border-color: rgba(255, 232, 181, 0.72);
    background: #f5dfac;
    color: #17130d;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.18);
}

.chip-reset {
    border-color: rgba(244, 212, 147, 0.44);
    color: #f4d493;
}

.hidden {
    display: none !important;
}

.chip.chip-activate {
    box-shadow: 0 0 0 3px rgba(245, 223, 172, 0.18);
}

/* Layout */
.main-content {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 1.35rem 0 2.75rem;
}

.category-section {
    margin-bottom: 2rem;
    scroll-margin-top: calc(var(--header-height) + 1rem);
    opacity: 1;
    max-height: 9000px;
    transition: opacity 0.35s ease, max-height 0.4s ease, margin 0.35s ease, padding 0.35s ease;
}

.category-section.is-hidden {
    max-height: 0;
    margin: 0;
    padding-top: 0;
    padding-bottom: 0;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
}

.category-title {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    margin: 0 0 0.85rem;
    color: var(--title-color);
    font-size: clamp(1.05rem, 2vw, 1.45rem);
    font-weight: 760;
    line-height: 1.2;
    letter-spacing: 0;
    scroll-margin-top: calc(var(--header-height) + 1rem);
}

.category-title::before {
    content: "";
    position: relative;
    display: inline-block;
    width: 34px;
    min-width: 34px;
    height: 28px;
    border: 1px solid var(--line-strong);
    border-radius: 8px;
    background:
        radial-gradient(circle at 72% 28%, color-mix(in srgb, var(--section-accent, var(--accent)) 78%, white) 0 3px, transparent 4px),
        linear-gradient(135deg, color-mix(in srgb, var(--section-accent, var(--accent)) 22%, var(--panel-bg)) 0%, var(--panel-bg) 58%),
        var(--panel-bg);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.82),
        0 6px 18px rgba(22, 24, 27, 0.06);
}

.category-title::after {
    content: "";
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--line-strong), rgba(27, 31, 35, 0));
}

section[data-category="research"] { --section-accent: #0f766e; }
section[data-category="finance"] { --section-accent: #a56f1f; }
section[data-category="governance"] { --section-accent: #445d8c; }
section[data-category="accounting"] { --section-accent: #8a3432; }
section[data-category="econometrics"] { --section-accent: #34615d; }
section[data-category="games"] { --section-accent: #7b4c99; }
section[data-category="other"] { --section-accent: #66705f; }

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
    gap: 1rem;
}

@media (min-width: 760px) {
    .apps-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1160px) {
    .apps-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

/* App Cards */
.app-card {
    position: relative;
    display: flex;
    min-height: 286px;
    flex-direction: column;
    overflow: hidden;
    padding: 1rem;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel-elevated);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0) 46px),
        var(--panel-elevated);
    box-shadow: 0 14px 36px var(--card-shadow);
    container-type: inline-size;
    opacity: 1;
    transition: box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.category-section .app-card {
    --card-accent: var(--section-accent, var(--accent));
}

.app-card::before {
    content: "";
    position: absolute;
    inset: 0 0 auto;
    height: 3px;
    background: var(--card-accent, var(--accent));
    opacity: 0.95;
}

.app-card::after {
    content: "";
    position: absolute;
    inset: 3px 0 auto;
    height: 1px;
    background: rgba(255, 255, 255, 0.75);
    pointer-events: none;
}

body.dark .app-card::after {
    background: rgba(255, 255, 255, 0.06);
}

.app-card:hover {
    border-color: color-mix(in srgb, var(--card-accent, var(--accent)) 42%, var(--line));
    box-shadow: 0 18px 42px rgba(22, 24, 27, 0.15);
}

body.dark .app-card:hover {
    box-shadow: 0 22px 50px rgba(0, 0, 0, 0.46);
}

.app-card:focus-within {
    border-color: color-mix(in srgb, var(--card-accent, var(--accent)) 62%, var(--line));
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--card-accent, var(--accent)) 24%, transparent), 0 20px 48px var(--card-shadow);
}

.app-card.recent-highlight {
    border-color: color-mix(in srgb, var(--accent-warm) 54%, var(--line));
    box-shadow: 0 20px 46px rgba(184, 131, 47, 0.18), 0 14px 36px var(--card-shadow);
}

.app-header {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    margin-bottom: 0.75rem;
}

.app-icon {
    display: grid;
    width: 46px;
    height: 46px;
    flex: 0 0 46px;
    place-items: center;
    border: 1px solid color-mix(in srgb, var(--card-accent, var(--accent)) 35%, var(--line));
    border-radius: 8px;
    background:
        radial-gradient(circle at 74% 24%, color-mix(in srgb, var(--card-accent, var(--accent)) 24%, transparent) 0 7px, transparent 8px),
        linear-gradient(145deg, color-mix(in srgb, var(--card-accent, var(--accent)) 12%, var(--panel-bg)) 0%, var(--panel-bg) 68%);
    color: var(--title-color);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.78),
        0 8px 18px rgba(22, 24, 27, 0.07);
    font-size: 1.22rem;
    line-height: 1;
    filter: saturate(0.82) contrast(1.04);
}

.app-info {
    min-width: 0;
    flex: 1;
}

.app-title {
    display: -webkit-box;
    margin-bottom: 0.38rem;
    overflow: hidden;
    color: var(--title-color);
    font-size: 1rem;
    font-weight: 760;
    line-height: 1.24;
    letter-spacing: 0;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    line-clamp: 2;
}

.app-subtitle {
    margin-bottom: 0.35rem;
    color: var(--muted-text);
    font-size: 0.78rem;
    font-weight: 680;
    line-height: 1.25;
}

.app-date {
    display: inline-flex !important;
    align-items: center;
    width: fit-content;
    max-width: 100%;
    min-height: 24px;
    padding: 0.28rem 0.48rem;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: color-mix(in srgb, var(--card-accent, var(--accent)) 8%, var(--panel-bg));
    color: color-mix(in srgb, var(--card-accent, var(--accent)) 62%, var(--text-color));
    font-size: 0.68rem;
    font-weight: 760;
    line-height: 1;
    visibility: visible;
    opacity: 1;
}

.app-card[data-new="true"] .app-date::before {
    content: "NEW";
    display: inline-flex;
    align-items: center;
    min-height: 18px;
    margin-right: 0.4rem;
    padding: 0.18rem 0.34rem;
    border-radius: 5px;
    background: var(--accent-warm);
    color: #14100a;
    font-size: 0.56rem;
    font-weight: 860;
    line-height: 1;
}

.app-description {
    flex: 1;
    margin-bottom: 0.9rem;
}

.app-desc {
    margin-bottom: 0.62rem;
    color: var(--muted-text);
    font-size: 0.88rem;
    font-weight: 470;
    line-height: 1.48;
}

.feature-list {
    display: grid;
    gap: 0.28rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.feature-list li {
    color: color-mix(in srgb, var(--muted-text) 88%, var(--title-color));
    font-size: 0.78rem;
    line-height: 1.38;
}

.feature-more {
    display: inline-flex;
    margin-top: 0.4rem;
    color: var(--card-accent, var(--accent));
    font-size: 0.76rem;
    font-weight: 760;
}

.app-footer,
.cta-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: auto;
}

.app-actions,
.card-actions {
    display: inline-flex;
    align-items: center;
    gap: 0.42rem;
}

.app-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    max-width: 100%;
    padding: 0.62rem 0.9rem;
    border: 1px solid color-mix(in srgb, var(--card-accent, var(--accent)) 54%, transparent);
    border-radius: 8px;
    background: var(--accent-ink);
    color: #fff9ec;
    box-shadow: 0 9px 22px rgba(16, 18, 20, 0.16);
    font-size: 0.86rem;
    font-weight: 780;
    line-height: 1;
    text-align: center;
    text-decoration: none;
    transition: background 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.app-link:hover {
    border-color: color-mix(in srgb, var(--card-accent, var(--accent)) 72%, transparent);
    background: color-mix(in srgb, var(--card-accent, var(--accent)) 26%, var(--accent-ink));
    box-shadow: 0 12px 28px rgba(16, 18, 20, 0.2);
}

.app-link:active {
    background: color-mix(in srgb, var(--card-accent, var(--accent)) 18%, var(--accent-ink));
}

.app-link:focus-visible,
.icon-btn:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--card-accent, var(--accent)) 24%, transparent);
    outline-offset: 2px;
}

.icon-btn {
    display: inline-grid;
    width: 38px;
    height: 38px;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel-bg);
    color: var(--title-color);
    box-shadow: 0 6px 16px rgba(22, 24, 27, 0.06);
    font: inherit;
    font-size: 0.95rem;
    line-height: 1;
    cursor: pointer;
    transition: background 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.icon-btn:hover {
    border-color: color-mix(in srgb, var(--card-accent, var(--accent)) 36%, var(--line));
    background: color-mix(in srgb, var(--card-accent, var(--accent)) 7%, var(--panel-bg));
    box-shadow: 0 9px 22px rgba(22, 24, 27, 0.09);
}

/* States and utilities */
.will-reveal {
    opacity: 1;
}

.revealed {
    opacity: 1;
}

.card-fade-in {
    opacity: 1;
}

.scroll-top {
    position: fixed;
    right: 1rem;
    bottom: 1rem;
    z-index: 30;
    display: grid;
    width: 44px;
    height: 44px;
    place-items: center;
    border: 1px solid rgba(248, 242, 230, 0.22);
    border-radius: 8px;
    background: #18201f;
    color: #fff9ec;
    box-shadow: 0 14px 34px rgba(16, 18, 20, 0.24);
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
    transition: opacity 0.22s ease, transform 0.22s ease, background 0.22s ease;
}

.scroll-top.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.scroll-top:hover {
    background: #26302e;
}

.tooltip {
    position: absolute;
    z-index: 1001;
    padding: 0.42rem 0.5rem;
    border-radius: 6px;
    background: rgba(16, 18, 20, 0.94);
    color: #fff9ec;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
    font-size: 0.74rem;
    line-height: 1;
    pointer-events: none;
}

.footer {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 0 0 2rem;
    color: var(--muted-text);
    font-size: 0.82rem;
    text-align: center;
}

.footer a {
    color: var(--title-color);
    text-decoration: none;
    border-bottom: 1px solid var(--line-strong);
}

.footer a:hover {
    color: var(--accent-strong);
    border-bottom-color: var(--accent-strong);
}

/* Command Palette */
.cmdk-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: flex-start;
    justify-content: center;
    padding-top: 12vh;
    background: rgba(16, 18, 20, 0.48);
}

.cmdk-overlay.open {
    display: flex;
}

.cmdk {
    width: min(720px, 92vw);
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel-elevated);
    color: var(--text-color);
    box-shadow: 0 28px 80px rgba(0, 0, 0, 0.28);
}

.cmdk-header {
    display: flex;
    gap: 0.5rem;
    padding: 0.82rem 0.95rem;
    border-bottom: 1px solid var(--line);
}

.cmdk-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    color: inherit;
    font: inherit;
    font-size: 0.95rem;
}

.cmdk-hint {
    color: var(--muted-text);
    font-size: 0.82rem;
}

.cmdk-list {
    max-height: 50vh;
    overflow: auto;
    padding: 0.35rem;
}

.cmdk-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 0.65rem;
    border-radius: 7px;
    cursor: pointer;
}

.cmdk-item:hover,
.cmdk-item.selected {
    background: color-mix(in srgb, var(--accent) 10%, transparent);
}

.cmdk-meta {
    margin-left: auto;
    color: var(--muted-text);
    font-size: 0.8rem;
}

/* Optional controls kept compatible with older markup */
.analytics-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0.25rem 0 0.65rem;
    color: var(--muted-text);
    font-size: 0.85rem;
}

.analytics-bar .sort-select,
.sort-select,
.search-input,
.reset-btn {
    min-height: 36px;
    padding: 0.45rem 0.65rem;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel-bg);
    color: var(--text-color);
    font: inherit;
}

.side-loader,
.loader {
    display: none !important;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}

@media (max-width: 900px) {
    :root {
        --header-height: 188px;
    }

    .header-content,
    .main-content,
    .footer {
        width: min(100% - 24px, 1180px);
    }

    .filter-bar {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 0.5rem;
        scrollbar-width: none;
    }

    .filter-bar::-webkit-scrollbar {
        display: none;
    }

    .chip {
        flex: 0 0 auto;
    }
}

@media (max-width: 640px) {
    :root {
        --header-height: 214px;
    }

    .header-content {
        padding-bottom: 0.85rem;
    }

    .language-toggle {
        position: static;
        margin-top: 0.75rem;
    }

    .filter-bar {
        margin-top: 0.8rem;
    }

    .main-content {
        padding-top: 1rem;
    }

    .category-section {
        margin-bottom: 1.55rem;
    }

    .apps-grid {
        grid-template-columns: 1fr;
        gap: 0.82rem;
    }

    .app-card {
        min-height: 0;
        padding: 0.88rem;
    }

    .app-icon {
        width: 38px;
        height: 38px;
        flex-basis: 38px;
        font-size: 1.08rem;
    }

    .app-title {
        font-size: 0.95rem;
    }

    .app-desc {
        font-size: 0.82rem;
    }

    .feature-list li {
        font-size: 0.74rem;
    }

    .app-link {
        width: auto;
        min-height: 36px;
    }

    .icon-btn {
        width: 36px;
        height: 36px;
    }
}