:root {
    /************ LIGHTMODE FARBEN ************/
    --hintergrund: #f0f4f8;
    --hintergrund-2: #ffffff;
    --text: #1a202c;
    --text-2: #4a5568;
    --akzent: #3182ce;
    --akzent-hover: #2c5282;
    --karte-hintergrund: #ffffff;
    --karte-vorne: #4299e1;
    --schatten: rgba(0, 0, 0, 0.1);
    --border-farbe: #e2e8f0;
}

/************ DARKMODE FARBEN ************/
[data-theme="dark"] {
    --hintergrund: #0f1219;
    --hintergrund-2: #1c2128;
    --text: #f7fafc;
    --text-2: #cbd5e0;
    --akzent: #4299e1;
    --akzent-hover: #63b3ed;
    --karte-hintergrund: #1c2128;
    --karte-vorne: #2b6cb0;
    --schatten: rgba(0, 0, 0, 0.3);
    --border-farbe: #4a5568;
}

/************ RESET ************/
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: "Montserrat", sans-serif;
    font-weight: 400;
    background-color: var(--hintergrund);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    padding: 1rem;
}

/************ FOKUS ************/
*:focus {
    outline: 3px solid var(--akzent);
    outline-offset: 2px;
}

*:focus:not(:focus-visible) {
    outline: none;
}

*:focus-visible {
    outline: 3px solid var(--akzent);
    outline-offset: 2px;
}

/************ HEADER ************/
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
    padding: 1rem 1.25rem;
    background-color: var(--hintergrund-2);
    border-radius: 1rem;
    box-shadow: 0 2px 8px var(--schatten);
}

.header-left h1 {
    font-weight: 600;
    font-size: 1.8rem;
}

.subtitle {
    font-size: 0.95rem;
    color: var(--text-2);
    margin-top: 0.25rem;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Stats */
.stats {
    display: flex;
    gap: 1rem;
    font-size: 0.95rem;
    color: var(--text-2);
}

/* Darkmode Button */
#darkmode-toggle {
    background-color: var(--karte-hintergrund);
    border: 0.5px solid var(--border-farbe);
    border-radius: 999px;
    padding: 0.4rem 0.75rem;
    cursor: pointer;
    font-size: 1.4rem;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

#darkmode-toggle:hover {
    transform: scale(1.08);
    background-color: var(--akzent);
    color: #fff;
}

#darkmode-toggle:active {
    transform: scale(0.95);
}

/************ MAIN ************/
main {
    max-width: 800px;
    margin: 0 auto;
}

.reaction-wrapper {
    background-color: var(--hintergrund-2);
    border-radius: 1rem;
    box-shadow: 0 2px 8px var(--schatten);
    padding: 1.5rem;
}

/************ REACTION CARD ************/
.reaction-card {
    background-color: var(--karte-hintergrund);
    border-radius: 1rem;
    border: 2px solid var(--border-farbe);
    padding: 2rem 1rem;
    text-align: center;
    margin-bottom: 1.5rem;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s, box-shadow 0.2s;
    box-shadow: 0 2px 8px var(--schatten);
}

.reaction-card:focus-visible {
    box-shadow: 0 0 0 3px var(--akzent);
}

.reaction-card.waiting {
    background-color: #fbbf24; /* gelb */
    border-color: #d97706;
}

.reaction-card.ready {
    background-color: #22c55e; /* grün */
    border-color: #15803d;
    box-shadow: 0 0 20px rgba(34, 197, 94, 0.6);
}

.reaction-card.too-soon {
    background-color: #fca5a5;
    border-color: #ef4444;
}

/* Text */
#reaction-message {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

.reaction-time {
    font-size: 2rem;
    font-weight: 600;
    color: var(--akzent);
}

/************ CONTROLS ************/
.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 1.5rem;
}

.btn-primary,
.btn-secondary {
    padding: 0.7rem 1.4rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 999px;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--akzent);
    color: #fff;
}

.btn-primary:hover {
    background-color: var(--akzent-hover);
}

.btn-secondary {
    background-color: var(--hintergrund);
    color: var(--text-2);
    border: 1px solid var(--border-farbe);
}

.btn-secondary:hover {
    background-color: var(--border-farbe);
}

/* Link zurück */
.btn-link {
    text-decoration: none;
    font-size: 0.9rem;
    color: var(--akzent);
}

.btn-link:hover {
    text-decoration: underline;
}

/************ HISTORY ************/
.history h2 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

#history-list {
    list-style: none;
    max-height: 200px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

#history-list li {
    font-size: 0.9rem;
    padding: 0.2rem 0;
    color: var(--text-2);
}

/************ RESPONSIVE ************/
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .header-right {
        width: 100%;
        justify-content: space-between;
    }

    .controls {
        flex-direction: column;
        align-items: flex-start;
    }
}

/************ YAY SCIENCE ************/
.yay-link,
.yay-link:visited,
.yay-link:hover,
.yay-link:active {
    text-decoration: none;
}

.yay-link h2 {
    text-decoration: none;
    text-align: center;
    font-weight: 500;
    font-size: 10px;
    margin-top: 1.5rem;
}