@import url('https://fonts.googleapis.com/css?family=Roboto+Mono:wght@300;400;500;700&display=swap');

/* =========================================================== */
/*  Design tokens                                              */
/* =========================================================== */

:root {
    /* Original palette — preserved so canvas pages stay on-brand */
    --color_primary: #f0d800;          /* mustard yellow */
    --color_primary_dark: #2b2700;     /* deep brown bg */
    --color_secondary: #333540;        /* slate (toolbox panels) */
    --color_accent: #ff8878;           /* coral */
    --color_code: #dad1a2;             /* muted parchment */

    /* Extended palette for the redesigned pages */
    --color_card: #38320a;
    --color_card_hover: #4a4214;
    --color_border: rgba(240, 216, 0, 0.18);
    --color_text: #f5ecc6;
    --color_muted: rgba(245, 236, 198, 0.65);

    --radius: 12px;
    --radius_sm: 6px;

    --space_1: 8px;
    --space_2: 16px;
    --space_3: 24px;
    --space_4: 32px;
    --space_5: 48px;
    --space_6: 64px;

    --font_mono: 'Roboto Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, monospace;

    --shadow_md: 0 4px 16px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background-color: var(--color_primary_dark);
    color: var(--color_text);
    font-family: var(--font_mono);
    font-size: 15px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background:
        radial-gradient(circle at 50% -10%, rgba(240, 216, 0, 0.08), transparent 60%),
        var(--color_primary_dark);
    min-height: 100vh;
}

a {
    color: var(--color_accent);
    text-decoration: none;
    transition: color 0.15s ease;
}
a:hover { color: var(--color_primary); }

/* =========================================================== */
/*  Site header                                                */
/* =========================================================== */

.site-header {
    max-width: 980px;
    margin: 0 auto;
    padding: var(--space_6) var(--space_3) var(--space_4);
    text-align: left;
}
.site-header .breadcrumb {
    display: inline-flex;
    align-items: center;
    gap: var(--space_1);
    margin-bottom: var(--space_3);
    font-size: 13px;
    color: var(--color_muted);
}
.site-header .breadcrumb a { color: var(--color_muted); }
.site-header .breadcrumb a:hover { color: var(--color_primary); }
.site-header .breadcrumb .sep { color: rgba(245, 236, 198, 0.3); }

.site-header .eyebrow {
    display: inline-block;
    color: var(--color_primary);
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    margin-bottom: var(--space_2);
    padding: 4px 10px;
    border: 1px solid var(--color_border);
    border-radius: 999px;
    background: rgba(240, 216, 0, 0.04);
}

.site-header h1 {
    font-family: var(--font_mono);
    font-weight: 500;
    font-size: clamp(28px, 4vw, 44px);
    letter-spacing: -0.01em;
    margin: 0 0 var(--space_2);
    color: var(--color_primary);
}
.site-header p {
    margin: 0;
    color: var(--color_muted);
    max-width: 640px;
}

/* =========================================================== */
/*  Card grid (landing)                                        */
/* =========================================================== */

.cards {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 var(--space_3) var(--space_6);
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space_3);
}

.card {
    display: block;
    padding: var(--space_3);
    background: var(--color_card);
    border: 1px solid var(--color_border);
    border-radius: var(--radius);
    color: var(--color_text);
    transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}
.card:hover {
    background: var(--color_card_hover);
    border-color: rgba(240, 216, 0, 0.45);
    transform: translateY(-2px);
}
.card .card-tag {
    display: inline-block;
    color: var(--color_primary);
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    margin-bottom: var(--space_2);
}
.card h3 {
    margin: 0 0 var(--space_1);
    font-size: 18px;
    font-weight: 500;
    color: var(--color_text);
    line-height: 1.3;
}
.card p {
    margin: 0;
    color: var(--color_muted);
    font-size: 13px;
    line-height: 1.5;
}
.card .card-arrow {
    position: absolute;
    bottom: var(--space_3);
    right: var(--space_3);
    color: var(--color_accent);
    font-size: 18px;
    opacity: 0;
    transform: translateX(-4px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}
.card:hover .card-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* Hero card for the Project — spans the full row */
.card--feature {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, #4a4214 0%, #2b2700 100%);
    border-color: rgba(240, 216, 0, 0.35);
    padding: var(--space_4);
}
.card--feature .card-tag { color: var(--color_accent); }
.card--feature h3 {
    font-size: clamp(20px, 2.4vw, 26px);
    margin-bottom: var(--space_2);
}
.card--feature p {
    font-size: 14px;
    max-width: 560px;
}

/* =========================================================== */
/*  Parts list (worksheet pages)                               */
/* =========================================================== */

.parts-list {
    max-width: 720px;
    margin: 0 auto var(--space_6);
    padding: 0 var(--space_3);
    list-style: none;
}
.parts-list li {
    margin: 0;
    border-bottom: 1px solid var(--color_border);
}
.parts-list li:first-child {
    border-top: 1px solid var(--color_border);
}
.parts-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space_2);
    color: var(--color_text);
    transition: background 0.15s ease, padding-left 0.15s ease;
}
.parts-list a:hover {
    background: rgba(240, 216, 0, 0.05);
    padding-left: var(--space_3);
    color: var(--color_primary);
}
.parts-list a .part-num {
    color: var(--color_primary);
    font-size: 12px;
    letter-spacing: 0.15em;
    margin-right: var(--space_2);
}
.parts-list a .part-arrow {
    color: var(--color_accent);
    opacity: 0.55;
}
.parts-list a:hover .part-arrow { opacity: 1; }

/* =========================================================== */
/*  Footer                                                     */
/* =========================================================== */

.site-footer {
    max-width: 980px;
    margin: 0 auto;
    padding: var(--space_4) var(--space_3) var(--space_5);
    color: var(--color_muted);
    font-size: 12px;
    text-align: center;
    border-top: 1px solid var(--color_border);
}
.site-footer a {
    color: var(--color_muted);
    border-bottom: 1px dotted var(--color_border);
}
.site-footer a:hover { color: var(--color_primary); }

@media (max-width: 600px) {
    .site-header { padding: var(--space_4) var(--space_2) var(--space_3); }
    .cards { padding: 0 var(--space_2) var(--space_4); gap: var(--space_2); }
    .parts-list { padding: 0 var(--space_2); }
}

/* =========================================================== */
/*  PRESERVED legacy classes                                   */
/*  These are referenced by the interactive canvas pages       */
/*  (Project/index.html and Worksheet*/partNN/main.html).      */
/*  Keeping them functional so existing demos keep working.    */
/* =========================================================== */

.program-container {
    margin: auto;
    max-width: 1100px;
}

.program-container td {
    padding: 0;
    vertical-align: top;
    height: 100%;
}

.canvas {
    margin: 0 auto;
}

.toolbox {
    width: 220px;
    margin: auto;
    border-collapse: collapse;
    background: var(--color_card);
    border: 1px solid var(--color_border);
    border-radius: var(--radius_sm);
    padding: 8px;
    color: var(--color_text);
}
.toolbox-row {
    border-bottom: 1px solid var(--color_border);
}
.toolbox-row td {
    padding-top: 10px;
    padding-bottom: 10px;
    text-align: left;
}
.toolbox .toolbox-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
}
.toolbox b {
    color: var(--color_primary);
    font-weight: 500;
}

.radio-list {
    width: 150px;
    height: 100px;
    background-color: var(--color_secondary);
    margin: auto;
    overflow: auto;
}

.label {
    margin: 0 auto 8px auto;
    font-weight: bold;
}

.description {
    margin: auto;
    margin-top: 1%;
    margin-bottom: 5%;
    width: 55%;
    min-width: 700px;
    text-align: center;
}

.seperator {
    margin: 1%;
    margin-right: auto;
    margin-left: auto;
    width: 60%;
    border-top: dashed;
    border-width: 1.75px;
    opacity: 0.5;
    border-color: white;
}

button {
    height: 28px;
    font-family: var(--font_mono);
    color: var(--color_primary_dark);
    background-color: var(--color_primary);
    border: none;
    padding: 4px 12px;
    border-radius: var(--radius_sm);
    outline: none;
    font-size: 13px;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.15s ease;
}
button:hover {
    background-color: var(--color_accent);
    color: white;
}
button:active { transform: scale(0.97); }

input[type="range"].slider {
    width: 100%;
    accent-color: var(--color_primary);
}
input[type="color"] {
    border: 1px solid var(--color_border);
    border-radius: var(--radius_sm);
    background: var(--color_card);
    cursor: pointer;
    height: 26px;
    width: 50px;
    padding: 0;
}
input[type="checkbox"] {
    accent-color: var(--color_primary);
}

strong {
    display: block;
    margin: 20px;
    font-weight: normal;
    font-style: italic;
    color: var(--color_code);
}

p.fps-text {
    color: var(--color_primary);
    font-size: 12px;
    letter-spacing: 0.1em;
}