/* Root layout */
:root {
    --rk-bg: #050608;
    --rk-bg-elevated: #101219;
    --rk-bg-elevated-soft: #131624;
    --rk-border-soft: #262a3a;
    --rk-border-strong: #3b425a;

    --rk-text-main: #f5f6fb;
    --rk-text-muted: #9ba1bc;
    --rk-text-soft: #6d7390;

    --rk-accent: #d6453b;        /* Rusty red */
    --rk-accent-soft: rgba(214, 69, 59, 0.15);
    --rk-accent-strong: #ff5b47;

    --rk-chip-bg: #171b2a;
    --rk-chip-border: #2e3548;

    --rk-radius-lg: 18px;
    --rk-radius-md: 12px;
    --rk-radius-sm: 999px;

    --rk-shadow-soft: 0 18px 40px rgba(0, 0, 0, 0.55);
    --rk-shadow-subtle: 0 10px 26px rgba(0, 0, 0, 0.4);

    --rk-transition-fast: 0.16s ease-out;
    --rk-transition-med: 0.24s ease-out;

    --rk-font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    min-height: 100%;
    background: radial-gradient(circle at top, #15182a 0, var(--rk-bg) 55%);
    color: var(--rk-text-main);
    font-family: var(--rk-font-main);
}

.page-root {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 24px 16px 32px;
}

/* Header */

.rk-header {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto 24px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 18px 32px;
    justify-content: space-between;
}

.rk-header-main {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    min-width: 0;
}

.rk-logo {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    font-size: 18px;
}

.rk-logo-rusty {
    color: var(--rk-accent-strong);
}

.rk-logo-kings {
    color: #ffffff;
}

.rk-header-text {
    max-width: 550px;
}

.rk-title {
    margin: 0 0 4px;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #ffffff;
}

.rk-subtitle {
    margin: 0;
    font-size: 13px;
    color: var(--rk-text-soft);
    line-height: 1.5;
}

.rk-header-nav {
    display: flex;
    gap: 10px;
    margin-left: auto;
}

.rk-nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 7px 16px;
    border-radius: var(--rk-radius-sm);
    border: 1px solid transparent;
    font-size: 13px;
    font-weight: 500;
    color: var(--rk-text-main);
    text-decoration: none;
    cursor: pointer;
    white-space: nowrap;
    transition:
        background var(--rk-transition-fast),
        border-color var(--rk-transition-fast),
        transform var(--rk-transition-fast),
        box-shadow var(--rk-transition-fast);
}

.rk-nav-btn-outline {
    border-color: var(--rk-border-soft);
    background: rgba(11, 14, 24, 0.8);
}

.rk-nav-btn-outline:hover {
    border-color: var(--rk-accent-soft);
    background: #151826;
    transform: translateY(-1px);
    box-shadow: var(--rk-shadow-subtle);
}

.rk-nav-btn-primary {
    border-color: var(--rk-accent-soft);
    background: linear-gradient(135deg, var(--rk-accent), var(--rk-accent-strong));
}

.rk-nav-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--rk-shadow-soft);
}

/* Main */

.rk-main {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    flex: 1 0 auto;
}

/* Filters */

.rk-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 18px;
    padding: 14px 16px;
    border-radius: var(--rk-radius-lg);
    background: rgba(10, 13, 23, 0.92);
    border: 1px solid var(--rk-border-soft);
    box-shadow: var(--rk-shadow-subtle);
}

.rk-filter-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 160px;
    flex: 1 1 0;
}

.rk-filter-group label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--rk-text-soft);
}

.rk-filter-group select,
.rk-filter-group input[type="text"] {
    border-radius: var(--rk-radius-md);
    border: 1px solid var(--rk-border-soft);
    background: #050712;
    color: var(--rk-text-main);
    padding: 8px 11px;
    font-size: 13px;
    outline: none;
    transition:
        border-color var(--rk-transition-fast),
        box-shadow var(--rk-transition-fast),
        background var(--rk-transition-fast);
}

.rk-filter-group select:focus,
.rk-filter-group input[type="text"]:focus {
    border-color: var(--rk-accent);
    box-shadow: 0 0 0 1px rgba(214, 69, 59, 0.4);
    background: #070919;
}

.rk-filter-search {
    flex: 2 1 220px;
}

.rk-search-wrapper {
    position: relative;
}

.rk-search-wrapper::before {
    content: "🔎";
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 13px;
    opacity: 0.7;
    pointer-events: none;
}

.rk-search-wrapper input {
    padding-left: 28px;
}

/* Toggle */

.rk-filter-toggle {
    flex: 2 1 260px;
    justify-content: flex-end;
}

.rk-toggle-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
}

.rk-toggle-label input {
    display: none;
}

.rk-toggle-custom {
    width: 36px;
    height: 20px;
    border-radius: 10px;
    background: #181c2a;
    border: 1px solid var(--rk-border-soft);
    position: relative;
    transition:
        background var(--rk-transition-fast),
        border-color var(--rk-transition-fast);
}

.rk-toggle-custom::before {
    content: "";
    position: absolute;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #ffffff;
    top: 2px;
    left: 2px;
    transition:
        transform var(--rk-transition-fast),
        box-shadow var(--rk-transition-fast);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.6);
}

.rk-toggle-label input:checked + .rk-toggle-custom {
    background: var(--rk-accent-soft);
    border-color: var(--rk-accent-strong);
}

.rk-toggle-label input:checked + .rk-toggle-custom::before {
    transform: translateX(14px);
}

.rk-toggle-text {
    font-size: 12px;
    color: var(--rk-text-muted);
}

/* Kits list */

.rk-kits-section {
    margin-bottom: 26px;
}

.rk-status {
    padding: 10px 12px;
    border-radius: var(--rk-radius-md);
    font-size: 12px;
    background: #171a26;
    border: 1px solid var(--rk-border-soft);
    color: var(--rk-text-muted);
    margin-bottom: 14px;
}

.rk-status-error {
    border-color: #ff4b4b;
    color: #ffb8b8;
    background: #3a1418;
}

.rk-status-hidden {
    display: none;
}

.rk-kits-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

/* Kit card */

.kit-card {
    border-radius: var(--rk-radius-lg);
    background: radial-gradient(circle at top left, #202641 0, #0b0d18 48%, #050608 100%);
    border: 1px solid rgba(61, 68, 96, 0.85);
    box-shadow: var(--rk-shadow-soft);
    overflow: hidden;
    transition:
        border-color var(--rk-transition-med),
        box-shadow var(--rk-transition-med),
        transform var(--rk-transition-fast),
        background var(--rk-transition-med);
}

.kit-card.open {
    border-color: var(--rk-accent-strong);
    background: radial-gradient(circle at top left, #262c4b 0, #0b0d18 55%, #050608 100%);
    transform: translateY(-1px);
}

/* Kit header */

.kit-header {
    width: 100%;
    border: none;
    padding: 14px 18px;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    cursor: pointer;
    text-align: left;
    color: inherit;
}

.kit-header-left {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
}

.kit-image-wrapper {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    background: radial-gradient(circle at 30% 0%, rgba(255, 255, 255, 0.28), rgba(255, 255, 255, 0.02));
    border: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    overflow: hidden;
}

.kit-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.kit-header-text-block {
    min-width: 0;
}

.kit-name-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.kit-name {
    font-size: 17px;
    font-weight: 600;
}

.kit-category-chip {
    padding: 2px 7px;
    border-radius: var(--rk-radius-sm);
    border: 1px solid var(--rk-chip-border);
    background: var(--rk-chip-bg);
    font-size: 11px;
    color: var(--rk-text-soft);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.kit-description {
    margin: 4px 0 0;
    font-size: 12px;
    color: var(--rk-text-soft);
}

.kit-header-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
    justify-content: flex-end;
}

.kit-meta-chip {
    padding: 4px 8px;
    border-radius: var(--rk-radius-sm);
    background: rgba(11, 13, 24, 0.9);
    border: 1px solid var(--rk-border-soft);
    font-size: 11px;
    color: var(--rk-text-muted);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.kit-meta-chip strong {
    color: var(--rk-text-main);
}

.kit-toggle-icon {
    width: 26px;
    height: 26px;
    border-radius: 999px;
    border: 1px solid var(--rk-border-soft);
    background: rgba(5, 7, 12, 0.9);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--rk-text-muted);
    transition:
        transform var(--rk-transition-fast),
        border-color var(--rk-transition-fast),
        background var(--rk-transition-fast),
        color var(--rk-transition-fast);
}

.kit-card.open .kit-toggle-icon {
    transform: rotate(90deg);
    border-color: var(--rk-accent-strong);
    background: var(--rk-accent-soft);
    color: var(--rk-text-main);
}

/* Kit body */

.kit-body {
    border-top: 1px solid rgba(65, 72, 104, 0.7);
    padding: 0 18px 14px;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition:
        max-height var(--rk-transition-med),
        opacity var(--rk-transition-med),
        padding-top var(--rk-transition-fast),
        padding-bottom var(--rk-transition-fast);
}

.kit-card.open .kit-body {
    padding-top: 10px;
    padding-bottom: 16px;
    opacity: 1;
    max-height: 700px; /* enough for tallest kit */
}

/* Kit body layout */

.kit-body-inner {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 2.2fr);
    gap: 18px;
}

.kit-body-meta {
    font-size: 12px;
    color: var(--rk-text-soft);
}

.kit-body-meta dl {
    margin: 8px 0 0;
    display: grid;
    grid-template-columns: auto auto;
    gap: 4px 12px;
}

.kit-body-meta dt {
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 10px;
    color: var(--rk-text-soft);
}

.kit-body-meta dd {
    margin: 0;
    font-size: 12px;
    color: var(--rk-text-main);
}

/* Item columns */

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

.kit-items-column {
    background: var(--rk-bg-elevated-soft);
    border-radius: var(--rk-radius-md);
    border: 1px solid var(--rk-border-soft);
    padding: 8px 8px 6px;
    display: flex;
    flex-direction: column;
    min-height: 72px;
}

.kit-items-title-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 4px;
}

.kit-items-title {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--rk-text-soft);
}

.kit-items-count {
    font-size: 10px;
    color: var(--rk-text-muted);
}

.item-list {
    list-style: none;
    padding: 0;
    margin: 2px 0 0;
    display: flex;
    flex-direction: column;
    gap: 3px;
    max-height: 210px;
    overflow-y: auto;
    scrollbar-width: thin;
}

.item-list::-webkit-scrollbar {
    width: 5px;
}

.item-list::-webkit-scrollbar-track {
    background: transparent;
}

.item-list::-webkit-scrollbar-thumb {
    background: rgba(101, 110, 145, 0.5);
    border-radius: 999px;
}

.item-row {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 5px;
    border-radius: 10px;
    background: rgba(10, 12, 21, 0.8);
    border: 1px solid transparent;
    font-size: 11px;
    color: var(--rk-text-main);
}

.item-row:nth-child(2n) {
    background: rgba(12, 14, 24, 0.95);
}

.item-row[data-type="belt"] {
    border-color: rgba(255, 190, 110, 0.25);
}

.item-row[data-type="wear"] {
    border-color: rgba(117, 182, 255, 0.25);
}

.item-icon-wrap {
    width: 24px;
    height: 24px;
    border-radius: 9px;
    background: radial-gradient(circle at 30% 0, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0.02));
    border: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    overflow: hidden;
}

.item-icon {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.item-icon-missing {
    opacity: 0.3;
    filter: grayscale(1);
}

.item-main {
    display: flex;
    flex-direction: column;
    min-width: 0;
    flex: 1 1 auto;
}

.item-name {
    font-size: 11px;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

.item-meta {
    font-size: 10px;
    color: var(--rk-text-muted);
}

.item-amount {
    margin-left: auto;
    font-variant-numeric: tabular-nums;
    font-size: 11px;
}

/* Empty columns */

.kit-items-column-empty {
    opacity: 0.5;
}

/* Footer */

.rk-footer {
    max-width: 1200px;
    margin: 4px auto 0;
    padding-top: 10px;
    border-top: 1px solid rgba(60, 65, 90, 0.6);
    font-size: 11px;
    color: var(--rk-text-soft);
}

/* Responsive */

@media (max-width: 960px) {
    .kit-body-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .kit-items-layout {
        grid-template-columns: minmax(0, 1fr);
    }

    .item-list {
        max-height: none;
    }
}

@media (max-width: 720px) {
    .page-root {
        padding: 16px 10px 24px;
    }

    .rk-header {
        margin-bottom: 16px;
    }

    .rk-header-main {
        flex-direction: row;
        align-items: center;
    }

    .rk-logo {
        font-size: 16px;
    }

    .rk-title {
        font-size: 19px;
    }

    .rk-header-nav {
        width: 100%;
        justify-content: flex-start;
    }

    .kit-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .kit-header-meta {
        justify-content: flex-start;
    }
}

@media (max-width: 480px) {
    .rk-filters {
        padding: 12px 10px;
    }

    .rk-filter-group {
        min-width: 100%;
    }

    .kit-header {
        padding: 12px 12px;
    }

    .kit-body {
        padding: 0 12px 12px;
    }
}