:root {
    /* Base colors */
    --white: #fff;
    --black: #000;
    --gray: #888;

    /* Workout type colors */
    --color-easy: #22c55e;
    --color-long: #3b82f6;
    --color-cross: #f59e0b;
    --color-race: #dc2626;

    /* Derived colors using color-mix */
    --text-dark: color-mix(in srgb, var(--black) 85%, var(--white));
    --text-muted: color-mix(in srgb, var(--black) 40%, var(--white));
    --border-light: color-mix(in srgb, var(--black) 15%, var(--white));
    --bg-muted: color-mix(in srgb, var(--black) 7%, var(--white));
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--white);
    min-height: 100vh;
    color: var(--text-dark);
    line-height: 1.6;
}

header {
    text-align: center;
    padding: 3rem 1rem;
    background: var(--white);
    color: var(--text-dark);
    border-bottom: 1px solid var(--border-light);
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

main {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Legend */
.legend {
    margin-bottom: 2rem;
}

.legend h2 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.legend-items {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.rest { background: var(--gray); }
.dot.easy { background: var(--color-easy); }
.dot.long { background: var(--color-long); }
.dot.cross { background: var(--color-cross); }
.dot.race { background: color-mix(in srgb, var(--color-race) 70%, var(--black)); }

/* Phases */
.phase {
    margin-bottom: 2rem;
}

.phase h2 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-light);
}

/* Weeks */
.week {
    margin-bottom: 1rem;
}

.week h3 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.dates {
    font-weight: 400;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.total {
    margin-left: auto;
    background: var(--bg-muted);
    color: var(--text-dark);
    padding: 0.2rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
}

.day {
    text-align: center;
    padding: 0.75rem 0.25rem;
    border-radius: 8px;
    transition: transform 0.2s;
}

.day:hover {
    transform: scale(1.05);
}

.day .label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
    text-transform: uppercase;
}

.day .workout {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
}

.day.rest {
    background: var(--bg-muted);
    color: var(--gray);
}

.day.easy {
    background: color-mix(in srgb, var(--color-easy) 15%, var(--white));
    color: color-mix(in srgb, var(--color-easy) 70%, var(--black));
}

.day.long {
    background: color-mix(in srgb, var(--color-long) 15%, var(--white));
    color: color-mix(in srgb, var(--color-long) 70%, var(--black));
}

.day.cross {
    background: color-mix(in srgb, var(--color-cross) 15%, var(--white));
    color: color-mix(in srgb, var(--color-cross) 70%, var(--black));
}

.day.race {
    background: color-mix(in srgb, var(--color-race) 20%, var(--white));
    color: color-mix(in srgb, var(--color-race) 70%, var(--black));
    font-weight: 700;
}

.note {
    font-size: 0.85rem;
    color: color-mix(in srgb, var(--color-cross) 70%, var(--black));
    font-style: italic;
    font-weight: 400;
}

.race-note {
    color: color-mix(in srgb, var(--color-race) 70%, var(--black));
    font-weight: 600;
}

.race-week {
    border: none;
}

/* Tips */
.tips {
    margin-top: 2rem;
}

.tips h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.tips ul {
    list-style: none;
}

.tips li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.tips li::before {
    content: ">";
    position: absolute;
    left: 0;
    color: color-mix(in srgb, var(--color-easy) 70%, var(--black));
}

.tips strong {
    color: color-mix(in srgb, var(--color-long) 70%, var(--black));
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 600px) {
    header h1 {
        font-size: 1.75rem;
    }

    .days {
        grid-template-columns: repeat(7, 1fr);
        gap: 0.25rem;
    }

    .day {
        padding: 0.5rem 0.1rem;
    }

    .day .label {
        font-size: 0.6rem;
    }

    .day .workout {
        font-size: 0.75rem;
    }

    .week h3 {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }

    .total {
        margin-left: 0;
    }
}