html {
    background:
        radial-gradient(circle at top, rgba(255, 255, 0, 0.75), transparent 25%),
        repeating-linear-gradient(45deg, #0900ff 0 12px, #00d9ff 12px 24px, #ff00d4 24px 36px, #ffe600 36px 48px);
}

body {
    margin: 0;
    font-family: "Comic Sans MS", "Trebuchet MS", cursive;
    color: #fff;
    text-shadow: 1px 1px 0 #000;
}

.page-shell {
    width: min(1100px, calc(100% - 24px));
    margin: 12px auto;
    border: 8px ridge #c0c0c0;
    background:
        linear-gradient(180deg, rgba(0, 0, 80, 0.9), rgba(80, 0, 80, 0.88)),
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160' viewBox='0 0 160 160'%3E%3Crect width='160' height='160' fill='none'/%3E%3Ccircle cx='10' cy='12' r='2' fill='%23fff'/%3E%3Ccircle cx='80' cy='35' r='1.5' fill='%23ff0'/%3E%3Ccircle cx='130' cy='90' r='2' fill='%230ff'/%3E%3Ccircle cx='45' cy='120' r='1.5' fill='%23f0f'/%3E%3C/svg%3E");
    box-shadow: 0 0 0 6px #000, 0 0 30px rgba(255, 255, 0, 0.7);
}

.masthead,
.footer-bar,
.menu-panel,
.hero-panel,
.widget {
    border: 4px outset #d8d8d8;
    background: rgba(0, 0, 0, 0.45);
}

.masthead {
    margin: 14px;
    padding: 16px;
    text-align: center;
    background:
        linear-gradient(90deg, rgba(255, 0, 140, 0.9), rgba(0, 255, 255, 0.9), rgba(255, 255, 0, 0.9));
    color: #12002e;
    text-shadow: none;
}

.masthead h1 {
    margin: 10px 0;
    font-size: clamp(2.5rem, 8vw, 5rem);
    letter-spacing: 4px;
}

.blink-banner {
    margin: 0 0 12px;
    font-weight: 700;
    animation: blink 0.85s steps(2, start) infinite;
}

.tagline {
    font-size: 1.1rem;
    font-weight: 700;
}

.gif-row {
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.top-gifs img {
    max-width: 220px;
}

.content-grid {
    display: grid;
    grid-template-columns: minmax(220px, 280px) 1fr;
    gap: 16px;
    padding: 0 14px 14px;
}

.menu-panel,
.hero-panel {
    padding: 16px;
}

.menu-panel {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 0, 255, 0.28)),
        #000066;
}

.menu-panel h2,
.hero-panel h2,
.widget h3 {
    margin-top: 0;
    color: #fffb00;
}

.panel-note,
.tiny-hint {
    font-size: 0.9rem;
}

.link-menu {
    list-style: none;
    padding: 0;
    margin: 18px 0;
}

.link-menu li + li {
    margin-top: 12px;
}

.link-menu a {
    display: block;
    padding: 10px 12px;
    border: 3px outset #fff;
    background: linear-gradient(180deg, #00f6ff, #0144ff);
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    text-align: center;
    box-shadow: 0 0 12px rgba(255, 255, 0, 0.5);
}

.link-menu a:hover {
    background: linear-gradient(180deg, #ff00aa, #7d00ff);
    transform: scale(1.03) rotate(-1deg);
}

.hero-panel {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(0, 0, 0, 0.32)),
        #001133;
}

.chrome-bar {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 6px 10px;
    border: 3px inset #fff;
    background: linear-gradient(90deg, #cbcbcb, #6b6b6b);
    color: #000;
    font-family: Verdana, sans-serif;
    font-size: 0.85rem;
    text-shadow: none;
}

.intro-box,
.features-table-wrap {
    margin-top: 16px;
    padding: 14px;
    border: 4px dotted #fffb00;
    background: rgba(255, 0, 255, 0.16);
}

.features-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    color: #000;
    text-shadow: none;
    font-family: Verdana, sans-serif;
}

.features-table th,
.features-table td {
    border: 2px solid #0000a8;
    padding: 10px;
}

.features-table th {
    background: #ffeb3b;
}

.widget-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.widget {
    padding: 14px;
    background: rgba(0, 0, 0, 0.5);
}

.guestbook {
    transform: rotate(-1.2deg);
}

.email {
    transform: rotate(1deg);
}

.email-line {
    font-size: 1.15rem;
    color: #00ffff;
}

.footer-bar {
    margin: 0 14px 14px;
    padding: 12px;
    text-align: center;
    background: linear-gradient(90deg, #111, #4d0000, #111);
}

.footer-link {
    color: #fffb00;
    font-weight: 700;
}

marquee {
    display: block;
    margin: 12px 0;
    padding: 8px;
    border: 3px dashed #12002e;
    background: rgba(255, 255, 255, 0.75);
    color: #c30000;
    font-weight: 700;
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

.calculator-masthead {
    background:
        linear-gradient(90deg, rgba(0, 255, 170, 0.92), rgba(255, 245, 0, 0.92), rgba(255, 102, 0, 0.92));
}

.database-masthead {
    background:
        linear-gradient(90deg, rgba(255, 122, 0, 0.92), rgba(255, 238, 0, 0.92), rgba(0, 255, 234, 0.92));
}

.calculator-panel {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(0, 0, 0, 0.25)),
        #1b003a;
}

.database-panel {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(0, 0, 0, 0.3)),
        #09203f;
}

.calculator-shell {
    margin-top: 16px;
    padding: 18px;
    border: 6px ridge #bdbdbd;
    background:
        linear-gradient(180deg, rgba(0, 255, 255, 0.18), rgba(255, 0, 170, 0.22)),
        #1a1a1a;
    box-shadow: inset 0 0 20px rgba(255, 255, 255, 0.15), 0 0 18px rgba(0, 255, 255, 0.35);
}

.calculator-screen-wrap {
    margin-bottom: 16px;
}

.screen-label {
    display: block;
    margin-bottom: 8px;
    color: #fffb00;
    font-weight: 700;
}

.calculator-screen {
    width: 100%;
    box-sizing: border-box;
    padding: 14px 16px;
    border: 4px inset #d2d2d2;
    background: #d9ffd6;
    color: #001400;
    font-family: "Courier New", monospace;
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    text-align: right;
    text-shadow: none;
}

.calculator-buttons {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.calc-btn {
    min-height: 62px;
    border: 4px outset #efefef;
    font-family: "Comic Sans MS", "Trebuchet MS", cursive;
    font-size: 1.35rem;
    font-weight: 700;
    color: #fff;
    cursor: pointer;
    text-shadow: 1px 1px 0 #000;
}

.calc-btn:active {
    border-style: inset;
    transform: translateY(1px);
}

.calc-btn.number {
    background: linear-gradient(180deg, #0066ff, #00bbff);
}

.calc-btn.operator {
    background: linear-gradient(180deg, #ff00a8, #8e00ff);
}

.calc-btn.action {
    background: linear-gradient(180deg, #ff6a00, #ffcf00);
    color: #2b1100;
    text-shadow: none;
}

.calc-btn.equals {
    background: linear-gradient(180deg, #00e676, #00a83e);
}

.calc-btn.wide {
    grid-column: span 2;
}

.calc-btn.tall {
    grid-column: 4;
    grid-row: span 2;
}

.calculator-widgets {
    margin-top: 18px;
}

.database-widget-row {
    margin-top: 18px;
}

.single-panel-layout {
    padding: 0 14px 14px;
}

.login-panel {
    max-width: 720px;
    margin: 0 auto 14px;
    padding: 16px;
}

.tool-widget {
    transform: none;
}

.flash-box {
    margin-top: 16px;
    padding: 12px 14px;
    border: 4px outset #fff;
    font-weight: 700;
}

.flash-success {
    background: linear-gradient(180deg, #00cf70, #009f48);
    color: #fff;
}

.flash-error {
    background: linear-gradient(180deg, #ff5666, #b10024);
    color: #fff;
}

.mono {
    font-family: "Courier New", monospace;
    word-break: break-all;
}

.sql-form {
    display: grid;
    gap: 10px;
}

.sql-editor {
    min-height: 240px;
    width: 100%;
    box-sizing: border-box;
    padding: 12px;
    border: 4px inset #d2d2d2;
    background: #101d12;
    color: #7cff88;
    font-family: "Courier New", monospace;
    font-size: 0.98rem;
    text-shadow: none;
    resize: vertical;
}

.retro-submit {
    padding: 12px 16px;
    border: 4px outset #efefef;
    background: linear-gradient(180deg, #00b7ff, #004cff);
    color: #fff;
    font-family: "Comic Sans MS", "Trebuchet MS", cursive;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    text-shadow: 1px 1px 0 #000;
}

.retro-submit:active {
    border-style: inset;
}

.danger-submit {
    background: linear-gradient(180deg, #ff4c6a, #a1002b);
}

.data-table td,
.data-table th {
    word-break: break-word;
}

.login-form,
.logout-form {
    display: grid;
    gap: 10px;
}

.logout-form {
    margin-top: 16px;
}

.text-input {
    width: 100%;
    box-sizing: border-box;
    padding: 12px;
    border: 4px inset #d2d2d2;
    background: #fff8b0;
    color: #1a0d00;
    font-family: "Courier New", monospace;
    font-size: 1rem;
    text-shadow: none;
}

.checkbox-line {
    display: flex;
    gap: 10px;
    align-items: center;
    font-weight: 700;
}

.user-management-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.user-card,
.user-create-card {
    transform: none;
}

.user-form-grid {
    display: grid;
    gap: 10px;
}

.compact-form {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 2px dashed rgba(255, 255, 255, 0.4);
}

.password-form {
    margin-top: 10px;
}

.delete-user-form {
    margin-top: 12px;
}

@media (max-width: 820px) {
    .content-grid,
    .widget-row,
    .user-management-grid {
        grid-template-columns: 1fr;
    }

    .chrome-bar {
        flex-direction: column;
    }

    .masthead h1 {
        letter-spacing: 1px;
    }

    .calculator-buttons {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .calc-btn {
        min-height: 56px;
        font-size: 1.15rem;
    }
}