/* --- Highlight keys and operators in notes --- */
.note code {
    background: #e3f1ff;
    color: #005fa3;
    font-weight: bold;
    border-radius: 4px;
    padding: 0.1em 0.4em;
    font-size: 1em;
    box-shadow: 0 1px 2px #0001;
}
/* --- General Note --- */
.note {
    margin: 2em auto 0 auto;
    max-width: 700px;
    font-size: 0.98em;
    color: #555;
    background: #f8f8f8;
    padding: 1em 1.5em;
    border-radius: 8px;
}

/* ===== CSS Variables ===== */
:root {
    --color-bg: #f9f9f9;
    --color-fg: #222;
    --color-primary: #0078d7;
    --color-primary-hover: #005fa3;
    --color-danger: #d70022;
    --color-disabled: #aaa;
    --color-container-bg: #fff;
    --color-shadow: #0001;
    --color-border: #ccc;
    --color-result-bg: #f1f1f1;
    --color-placeholder-bg: #e0e0e0;
    --color-placeholder-fg: #888;
    --color-table-th-bg: #eee;
    --color-ctrl-group: #e0f7fa;
    --color-col1-group: #fffde7;
    --color-col2-group: #e8f5e9;
    --color-col3-group: #f3e5f5;
    --color-col4-group: #fce4ec;
    --font-main: Arial, sans-serif;
    --font-mono: monospace;
    --radius: 8px;
    --radius-sm: 4px;
    --padding-main: 2em;
    --padding-sm: 1em;
    --shadow-main: 0 2px 8px var(--color-shadow);
}

/* ===== Site Framework CSS ===== */

/* --- Layout & Container --- */
body {
    font-family: var(--font-main);
    margin: 40px;
    background: var(--color-bg);
    color: var(--color-fg);
}
.container {
    max-width: 700px;
    margin: auto;
    background: var(--color-container-bg);
    padding: var(--padding-main);
    border-radius: var(--radius);
    box-shadow: var(--shadow-main);
}
@media (max-width: 600px) {
    .container { max-width: 98vw; padding: var(--padding-sm); }
    .side-menu { padding: var(--padding-sm); }
}

/* --- Typography & Links --- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    margin-top: 1.5em;
    margin-bottom: 0.5em;
}
p, ul, ol {
    margin-bottom: 1.5em;
}
a {
    color: var(--color-primary);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
    color: var(--color-primary-hover);
}

/* --- Navigation: Hamburger & Side Menu --- */
.hamburger-menu {
    width: 32px;
    height: 32px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    cursor: pointer;
    margin-bottom: 1em;
}
.hamburger-menu span {
    height: 4px;
    background: var(--color-primary);
    margin: 4px 0;
    border-radius: 2px;
    transition: 0.3s;
}
.side-menu {
    display: none;
    position: absolute;
    left: 0;
    top: 0;
    background: var(--color-container-bg);
    box-shadow: 2px 0 8px var(--color-shadow);
    padding: var(--padding-sm) 2em var(--padding-sm) var(--padding-sm);
    border-radius: 0 var(--radius) var(--radius) 0;
    z-index: 100;
}
.side-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.side-menu li {
    margin-bottom: 1em;
}
.side-menu a {
    color: var(--color-primary);
    text-decoration: none;
    font-size: 1.1em;
}

/* --- Buttons & Utility --- */
button, .btn {
    padding: 0.5em 1.5em;
    font-size: 1em;
    border: none;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-sm);
    cursor: pointer;
    margin-top: 1.5em;
}
button:disabled, .btn:disabled {
    background: var(--color-disabled);
    cursor: not-allowed;
}
.clear-btn {
    background: var(--color-danger);
}

/* --- Forms --- */
label {
    display: block;
    margin-top: 1em;
}
input[type="number"], textarea {
    width: 100%;
    padding: 0.5em;
    font-size: 1em;
    margin-top: 0.2em;
    box-sizing: border-box;
}
textarea {
    min-height: 2.5em;
    resize: vertical;
    margin-bottom: 1em;
}

/* --- Components --- */
.result {
    margin-top: 2em;
    background: var(--color-result-bg);
    padding: 1em;
    border-radius: 6px;
    text-align: center;
}
.donate-section {
    margin-top: 2em;
    padding: 1em;
    background: var(--color-result-bg);
    border-radius: 6px;
    text-align: center;
}
.qr-codes {
    display: flex;
    justify-content: center;
    gap: 2em;
    margin-top: 1em;
}
.qr-placeholder {
    width: 120px;
    height: 120px;
    background: var(--color-placeholder-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    color: var(--color-placeholder-fg);
    font-size: 0.9em;
}

/* --- Stopwatch --- */
.stopwatch-time {
    font-size: 2.5em;
    text-align: center;
    margin: 1em 0;
}
.stopwatch-controls {
    text-align: center;
    margin-bottom: 1em;
}
.stopwatch-controls button {
    margin: 0 0.5em;
}
.history {
    margin-top: 2em;
}
.history h3 {
    margin-bottom: 0.5em;
}
.history-list {
    background: #f1f1f1;
    border-radius: 6px;
    padding: 1em;
    min-height: 2em;
}
.history-list li {
    margin-bottom: 0.5em;
}

/* --- ASCII Table --- */
body.ascii-table {
    font-family: var(--font-mono);
}
table.ascii-table {
    border-collapse: collapse;
    margin: 2em auto;
}
table.ascii-table th, table.ascii-table td {
    border: 1px solid var(--color-border);
    padding: 0.5em 1em;
    text-align: center;
}
table.ascii-table th {
    background: var(--color-table-th-bg);
}
.ctrl-group { background: var(--color-ctrl-group); }
.col1-group { background: var(--color-col1-group); }
.col2-group { background: var(--color-col2-group); }
.col3-group { background: var(--color-col3-group); }
.col4-group { background: var(--color-col4-group); }

/* ===== End Site Framework CSS ===== */