:root {
    color-scheme: light;
    --background: #f3f3f3;
    --paper: #fff;
    --ink: #202020;
    --border: #c4c4c4;
    --selection-background: #fef3c7;
    --selection-border: #a16207;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--background);
    color: var(--ink);
    font-family: system-ui, sans-serif;
    line-height: 1.5;
}

main {
    max-width: 1120px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

h1, h2, h3, .item-name {
    margin: 0;
}

h1 {
    font-size: 1.75rem;
}

h2 {
    margin-bottom: 12px;
    font-size: 1.25rem;
}

form {
    max-width: 560px;
    margin: 24px 0;
}

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
}

.form-controls {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
}

input, button {
    min-height: 36px;
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--paper);
    color: var(--ink);
    font: inherit;
}

input {
    width: 100%;
}

button {
    cursor: pointer;
}

button:hover {
    border-color: var(--ink);
}

input:focus-visible, button:focus-visible {
    outline: 3px solid var(--ink);
    outline-offset: 2px;
}

.items {
    display: flex;
    flex-wrap: wrap;
    align-content: start;
    align-items: start;
    gap: 10px;
    min-height: 100px;
    padding: 12px;
}

.tier {
    display: grid;
    grid-template-columns: 40px minmax(0, 1fr);
    border: 1px solid var(--border);
    background: var(--paper);
}

.tier + .tier {
    border-top: 0;
}

.tier h3 {
    display: grid;
    place-items: center;
    background: var(--tier-color);
    font-size: 1.25rem;
}

[data-tier="S"] { --tier-color: #ffc4bc; }
[data-tier="A"] { --tier-color: #ffddb2; }
[data-tier="B"] { --tier-color: #fff0ad; }
[data-tier="C"] { --tier-color: #d6efbc; }
[data-tier="D"] { --tier-color: #c6e3f7; }

.item {
    position: relative;
    width: 180px;
    max-width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--paper);
    box-shadow: 0 2px 3px #00000014;
}

.item-name {
    min-height: 36px;
    padding-right: 36px;
    margin-bottom: 10px;
    font-weight: 600;
    overflow-wrap: anywhere;
}

.item-controls {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 4px;
}

.item-controls button {
    padding: 4px 8px;
    font-size: 0.875rem;
}

.item > [data-action="delete"] {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 32px;
    padding: 4px;
    border-color: transparent;
}

.item.selected {
    background: var(--selection-background);
    outline: 2px solid var(--selection-border);
}