* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

/* Game join portal */
body.home-page {
    --page-bg: #f3f5f9;
    --panel: #ffffff;
    --panel-alt: #f9fafc;
    --border: #dfe5ee;
    --text: #1f2937;
    --muted: #596579;
    --primary: #4257d8;
    --primary-dark: #2d3ea9;
    --shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
    --gimkit: #2bb673;
    --kahoot: #ff8a1d;
    --nearpod: #4d5ef1;
    --blooket: #ef476f;

    margin: 0;
    min-height: 100vh;
    padding: 32px 18px 88px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--page-bg);
    color: var(--text);
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

.home-page .app-shell {
    width: min(960px, 100%);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.home-page .hero {
    padding: 28px 28px 22px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: var(--panel);
    box-shadow: var(--shadow);
}

.home-page .eyebrow {
    margin: 0 0 10px;
    color: var(--primary);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.home-page h1 {
    margin: 0;
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    line-height: 1.1;
    letter-spacing: -0.05em;
}

.home-page .subhead {
    max-width: 620px;
    margin: 12px 0 0;
    color: var(--muted);
    font-size: 1rem;
}

.home-page .join-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.home-page .join-card {
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--panel);
    box-shadow: var(--shadow);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.home-page .join-card:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 20px rgba(15, 23, 42, 0.08);
}

.home-page .platform {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.home-page .platform-badge {
    width: 14px;
    height: 14px;
    display: inline-block;
    flex-shrink: 0;
    border-radius: 50%;
}

.home-page .platform-badge.gimkit { background: var(--gimkit); }
.home-page .platform-badge.kahoot { background: var(--kahoot); }
.home-page .platform-badge.nearpod { background: var(--nearpod); }
.home-page .platform-badge.blooket { background: var(--blooket); }

.home-page h2 {
    margin: 0;
    font-size: 1.1rem;
}

.home-page .platform-copy {
    margin: 2px 0 0;
    color: var(--muted);
    font-size: 0.84rem;
}

.home-page .controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.home-page .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.home-page input {
    flex: 1;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--panel-alt);
    color: var(--text);
    font-size: 1rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.home-page input:focus {
    outline: none;
    border-color: rgba(66, 87, 216, 0.8);
    box-shadow: 0 0 0 3px rgba(66, 87, 216, 0.08);
}

.home-page button {
    padding: 12px 16px;
    border: none;
    border-radius: 10px;
    background: var(--primary);
    color: white;
    font-size: 0.94rem;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.15s ease, transform 0.15s ease;
}

.home-page button:hover {
    background: var(--primary-dark);
}

.home-page button:active {
    transform: translateY(0);
}

.home-page footer {
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    padding: 14px 18px;
    background: #111827;
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.92rem;
    letter-spacing: 0.02em;
    text-align: center;
}

/* Learning and game portal */
body.education-page {
    --bg: #f3f7ff;
    --bg-accent: #e9f0ff;
    --panel: rgba(255, 255, 255, 0.9);
    --text: #1c2333;
    --muted: #5f6b85;
    --primary: #4969f5;
    --primary-dark: #2d4ae0;
    --shadow: 0 18px 40px rgba(17, 24, 39, 0.08);
    --border: rgba(92, 112, 148, 0.15);

    min-height: 100vh;
    padding: 32px 18px 72px;
    display: flex;
    justify-content: center;
    margin: 0;
    background: linear-gradient(135deg, var(--bg) 0%, var(--bg-accent) 100%);
    color: var(--text);
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

.education-page .page {
    width: min(1080px, 100%);
}

.education-page footer {
    margin: 28px auto 0;
    color: var(--muted);
    font-size: 0.88rem;
    text-align: center;
}

.education-page .topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
    padding: 18px 22px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.78);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
}

.education-page .brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.education-page .brand-mark {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--primary) 0%, #7c8ff9 100%);
    color: white;
    font-size: 1.2rem;
    box-shadow: 0 12px 18px rgba(73, 105, 245, 0.25);
}

.education-page .topbar-links {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.education-page .feedback-link {
    padding: 10px 16px;
    border: 1px solid rgba(73, 105, 245, 0.2);
    border-radius: 12px;
    background: rgba(73, 105, 245, 0.06);
    color: var(--primary-dark);
    font-weight: 700;
    text-decoration: none;
    transition: all 0.2s ease;
}

.education-page .utopia-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.education-page .utopia-link img {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    object-fit: cover;
}

.education-page .feedback-link:hover {
    transform: translateY(-1px);
    background: rgba(73, 105, 245, 0.12);
}

.education-page .hero {
    margin-bottom: 28px;
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: 28px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(245, 248, 255, 0.95));
    box-shadow: var(--shadow);
}

.education-page .eyebrow {
    margin: 0 0 12px;
    color: var(--primary);
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.education-page h1 {
    margin: 0;
    font-size: clamp(2.2rem, 4vw, 3.4rem);
    line-height: 1.05;
    letter-spacing: -0.05em;
}

.education-page .subtitle {
    max-width: 700px;
    margin: 14px 0 0;
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.6;
}

.education-page .game-grid,
.education-page .launch-settings {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 14px;
}

.education-page .launch-settings {
    margin-bottom: 20px;
}

.education-page .setting-field {
    display: grid;
    gap: 7px;
    color: var(--muted);
    font-size: 0.88rem;
    font-weight: 700;
}

.education-page .setting-field input {
    width: 100%;
    min-height: 48px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--panel);
    color: var(--text);
    font: inherit;
    font-weight: 400;
}

.education-page .setting-field input:focus-visible {
    outline: 3px solid rgba(73, 105, 245, 0.25);
    outline-offset: 2px;
}

.education-page .icon-presets {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.education-page .icon-preset-item {
    position: relative;
    width: 42px;
    height: 42px;
}

.education-page .icon-preset,
.education-page .icon-preset-add,
.education-page .icon-preset-manage {
    width: 42px;
    height: 42px;
    padding: 0;
    display: grid;
    place-items: center;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--panel);
    cursor: pointer;
    transition: border-color 0.15s ease, background-color 0.15s ease, transform 0.15s ease;
}

.education-page .icon-preset img {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

.education-page .icon-preset[aria-pressed="true"] {
    border-color: var(--primary);
    background: rgba(73, 105, 245, 0.12);
    box-shadow: 0 0 0 2px rgba(73, 105, 245, 0.14);
}

.education-page .icon-preset:hover,
.education-page .icon-preset-add:hover,
.education-page .icon-preset-manage:hover {
    transform: translateY(-1px);
    border-color: var(--primary);
}

.education-page .icon-preset:focus-visible,
.education-page .icon-preset-add:focus-visible,
.education-page .icon-preset-manage:focus-visible,
.education-page .icon-preset-edit:focus-visible,
.education-page .icon-preset-delete:focus-visible {
    outline: 3px solid rgba(73, 105, 245, 0.25);
    outline-offset: 2px;
}

.education-page .icon-preset-add,
.education-page .icon-preset-manage {
    color: var(--primary-dark);
    font: inherit;
    font-size: 1.4rem;
    font-weight: 700;
}

.education-page .icon-preset-manage[aria-pressed="true"] {
    border-color: var(--primary);
    background: rgba(73, 105, 245, 0.12);
}

.education-page .icon-preset-actions {
    position: absolute;
    z-index: 1;
    top: -7px;
    right: -7px;
    display: none;
    gap: 2px;
}

.education-page .icon-presets.is-editing .icon-preset-actions {
    display: flex;
}

.education-page .icon-preset-edit,
.education-page .icon-preset-delete {
    width: 22px;
    height: 22px;
    padding: 0;
    display: grid;
    place-items: center;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: white;
    color: var(--text);
    font: inherit;
    font-size: 0.85rem;
    line-height: 1;
    cursor: pointer;
}

.education-page .icon-preset-delete {
    color: #b42318;
}

.education-page .game-tools {
    margin-bottom: 14px;
}

.education-page .game-search {
    display: block;
    max-width: 440px;
}

.education-page .game-search input {
    width: 100%;
    min-height: 48px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--panel);
    color: var(--text);
    font: inherit;
}

.education-page .game-search input:focus-visible {
    outline: 3px solid rgba(73, 105, 245, 0.25);
    outline-offset: 2px;
}

.education-page .game-empty-state {
    margin: 12px 0;
    color: var(--muted);
}

.education-page .game-empty-state[hidden],
.education-page .game-button[hidden] {
    display: none;
}

.education-page .game-section {
    margin-top: 24px;
}

.education-page .game-section h2 {
    margin: 0 0 12px;
    color: var(--text);
    font-size: 1rem;
    font-weight: 800;
}

.education-page .game-context-menu {
    position: fixed;
    z-index: 10;
    min-width: 140px;
    padding: 4px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--panel);
    box-shadow: var(--shadow);
}

.education-page .game-context-menu[hidden] {
    display: none;
}

.education-page .game-context-menu button {
    width: 100%;
    padding: 8px 10px;
    border: 0;
    border-radius: 5px;
    background: transparent;
    color: var(--text);
    font: inherit;
    text-align: left;
    cursor: pointer;
}

.education-page .game-context-menu button:hover,
.education-page .game-context-menu button:focus-visible {
    background: rgba(73, 105, 245, 0.1);
    outline: none;
}

.education-page .icon-editor {
    width: min(440px, calc(100% - 32px));
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--panel);
    color: var(--text);
    box-shadow: var(--shadow);
}

.education-page .icon-editor::backdrop {
    background: rgba(17, 24, 39, 0.42);
}

.education-page .icon-editor form {
    display: grid;
    gap: 12px;
    padding: 22px;
}

.education-page .icon-editor h2 {
    margin: 0;
    font-size: 1.15rem;
}

.education-page .icon-editor label {
    color: var(--muted);
    font-size: 0.88rem;
    font-weight: 700;
}

.education-page .icon-editor input {
    width: 100%;
    min-height: 44px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: white;
    color: var(--text);
    font: inherit;
}

.education-page .icon-editor input:focus-visible {
    outline: 3px solid rgba(73, 105, 245, 0.25);
    outline-offset: 2px;
}

.education-page .icon-editor-error {
    margin: 0;
    color: #b42318;
    font-size: 0.88rem;
}

.education-page .icon-editor-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 4px;
}

.education-page .icon-editor-actions button {
    min-height: 40px;
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: white;
    color: var(--text);
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.education-page .icon-editor-actions .icon-editor-save {
    border-color: var(--primary);
    background: var(--primary);
    color: white;
}

.education-page .icon-editor-actions button:focus-visible {
    outline: 3px solid rgba(73, 105, 245, 0.25);
    outline-offset: 2px;
}

.education-page .game-button {
    appearance: none;
    min-height: 68px;
    padding: 18px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--panel);
    box-shadow: 0 8px 20px rgba(17, 24, 39, 0.05);
    color: var(--text);
    font: inherit;
    font-size: 1rem;
    font-weight: 700;
    text-align: left;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.education-page .game-button::after {
    content: "Open";
    color: var(--primary-dark);
    font-size: 0.82rem;
    font-weight: 700;
}

.education-page .game-button:hover,
.education-page .game-button:focus-visible {
    transform: translateY(-2px);
    border-color: rgba(73, 105, 245, 0.4);
    box-shadow: 0 14px 26px rgba(17, 24, 39, 0.1);
}

.education-page .game-button:focus-visible {
    outline: 3px solid rgba(73, 105, 245, 0.25);
    outline-offset: 2px;
}

@media (max-width: 700px) {
    .home-page .join-list {
        grid-template-columns: 1fr;
    }

    .home-page .controls {
        flex-direction: column;
        align-items: stretch;
    }

    .home-page button {
        width: 100%;
    }
}

@media (max-width: 640px) {
    .education-page {
        padding: 20px 14px 56px;
    }

    .education-page .topbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .education-page .hero {
        padding: 24px 20px;
    }
}