:root {
    --color-blue: #253573;
    --color-sky: #00a3e0;
    --color-gold: #f2c111;
    --color-green: #3ca35d;
    --color-text: #222222;
    --color-muted: #666666;
    --color-line: #dddddd;
    --color-page: #f5f5f0;
    --color-white: #ffffff;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--color-text);
    background: var(--color-page);
    font-family: Arial, Helvetica, sans-serif;
}

button,
input {
    font: inherit;
}

button {
    cursor: pointer;
}

.app-header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-line);
}

.app-header__content {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
    padding: 16px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand__mark {
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    border-radius: 8px;
    color: var(--color-white);
    background: var(--color-blue);
    font-size: 24px;
    font-weight: 700;
}

.brand__title {
    margin: 0;
    font-size: 22px;
}

.brand__subtitle {
    margin: 2px 0 0;
    color: var(--color-muted);
    font-size: 14px;
}

.top-menu {
    display: flex;
    gap: 8px;
}

.tab-button,
.shape-button,
.action-button,
.small-button,
.icon-button {
    border: 1px solid var(--color-line);
    border-radius: 8px;
    color: var(--color-text);
    background: var(--color-white);
}

.tab-button {
    padding: 10px 14px;
}

.tab-button--active {
    color: var(--color-white);
    border-color: var(--color-blue);
    background: var(--color-blue);
}

.page {
    width: min(1120px, calc(100% - 32px));
    margin: 24px auto;
}

.page-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
    gap: 20px;
}

.tab-panel--hidden {
    display: none;
}

.panel {
    padding: 20px;
    border: 1px solid var(--color-line);
    border-radius: 8px;
    background: var(--color-white);
}

.panel__header {
    margin-bottom: 16px;
}

.panel__title {
    margin: 0;
    font-size: 20px;
}

.icon-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.icon-button {
    min-height: 76px;
    padding: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    text-align: left;
}

.icon-button--active {
    border-color: var(--color-blue);
    background: #eef3ff;
}

.icon-button__image {
    width: 42px;
    height: 42px;
    flex: 0 0 42px;
    display: grid;
    place-items: center;
}

.icon-button__image svg,
.browser-tab__icon svg,
.main-preview svg {
    width: 100%;
    height: 100%;
    display: block;
}

.icon-button__name,
.icon-button__category {
    display: block;
}

.icon-button__name {
    font-weight: 700;
    font-size: 14px;
}

.icon-button__category {
    margin-top: 3px;
    color: var(--color-muted);
    font-size: 12px;
}

.form-area {
    margin-top: 22px;
    padding-top: 18px;
    border-top: 1px solid var(--color-line);
}

.shape-list {
    margin-top: 12px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.shape-button {
    padding: 10px 8px;
}

.shape-button--active {
    color: var(--color-white);
    border-color: var(--color-blue);
    background: var(--color-blue);
}

.field {
    margin-top: 16px;
}

.field--hidden {
    display: none;
}

.field__label {
    display: block;
    margin-bottom: 8px;
    font-weight: 700;
    font-size: 14px;
}

.color-field {
    display: flex;
    align-items: center;
    gap: 12px;
}

.color-field__input {
    width: 46px;
    height: 38px;
    padding: 0;
}

.color-field__value {
    font-family: Consolas, monospace;
    font-size: 14px;
}

.preview-tabs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.browser-tab {
    min-height: 48px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--color-line);
}

.browser-tab--light {
    color: #222222;
    background: #ffffff;
}

.browser-tab--dark {
    color: #ffffff;
    border-color: #333333;
    background: #1f1f1f;
}

.browser-tab__icon {
    width: 24px;
    height: 24px;
    flex: 0 0 24px;
}

.browser-tab__text {
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    font-size: 14px;
}

.main-preview {
    width: 210px;
    height: 210px;
    margin: 28px auto;
    display: grid;
    place-items: center;
    border: 1px dashed var(--color-line);
    border-radius: 8px;
    background: #fafafa;
}

.download-area {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.action-button {
    min-height: 42px;
    padding: 10px;
}

.action-button--main {
    color: var(--color-white);
    border-color: var(--color-green);
    background: var(--color-green);
}

.code-area {
    margin-top: 18px;
}

.code-area__header {
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.code-area__label {
    font-weight: 700;
}

.small-button {
    padding: 8px 10px;
}

.code-box {
    margin: 0;
    padding: 12px;
    overflow-x: auto;
    border: 1px solid var(--color-line);
    border-radius: 8px;
    background: #f7f7f7;
}

.color-list {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.color-card {
    min-height: 76px;
    padding: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    border: 1px solid var(--color-line);
    border-radius: 8px;
}

.color-card strong,
.color-card span {
    display: block;
}

.color-card__sample {
    width: 30px;
    height: 30px;
    flex: 0 0 30px;
    border-radius: 8px;
    border: 1px solid var(--color-line);
}

.color-card__sample--blue {
    background: var(--color-blue);
}

.color-card__sample--sky {
    background: var(--color-sky);
}

.color-card__sample--gold {
    background: var(--color-gold);
}

.color-card__sample--green {
    background: var(--color-green);
}

.app-footer {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    color: var(--color-muted);
    font-size: 14px;
}

.access-counter {
    display: flex;
    align-items: center;
    gap: 8px;
}

.access-counter__value {
    min-width: 34px;
    padding: 5px 8px;
    border-radius: 8px;
    color: var(--color-white);
    background: var(--color-blue);
    text-align: center;
}

.toast {
    position: fixed;
    right: 16px;
    bottom: 16px;
    max-width: 280px;
    padding: 12px 14px;
    border-radius: 8px;
    color: var(--color-white);
    background: var(--color-blue);
    opacity: 0;
    transform: translateY(16px);
    pointer-events: none;
    transition: 0.2s;
}

.toast--visible {
    opacity: 1;
    transform: translateY(0);
}

.hidden-canvas {
    display: none;
}

@media (max-width: 800px) {
    .app-header__content {
        align-items: flex-start;
        flex-direction: column;
    }

    .app-footer {
        align-items: flex-start;
        flex-direction: column;
    }

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

    .icon-list,
    .preview-tabs,
    .color-list {
        grid-template-columns: 1fr;
    }

    .download-area {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .top-menu,
    .shape-list,
    .download-area {
        grid-template-columns: 1fr;
        width: 100%;
        display: grid;
    }

    .main-preview {
        width: 180px;
        height: 180px;
    }
}