/* Variables */
:root {
    --primary-color: #4a90e2;
    --secondary-color: #f5f5f5;
    --text-color: #333;
    --background-color: #fff;
}

/* Dark theme */
[data-theme="dark"] {
    --primary-color: #64b5f6;
    --secondary-color: #333;
    --text-color: #fff;
    --background-color: #1a1a1a;
}

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

body {
    font-family: Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: all 0.3s ease;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

/* Navigation */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
}

#themeToggle {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-size: 20px;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 10px;
    margin: 20px 0;
}

.tab-btn {
    padding: 10px 20px;
    border: none;
    background-color: var(--secondary-color);
    color: var(--text-color);
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background-color: var(--primary-color);
    color: white;
}

/* Content */
.tab-content {
    display: none;
    padding: 20px;
    background-color: var(--secondary-color);
    border-radius: 10px;
}

.tab-content.active {
    display: block;
}

/* Time displays */
.time {
    font-size: 48px;
    font-weight: bold;
    text-align: center;
    margin: 20px 0;
}

/* Buttons */
.buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin: 20px 0;
}

button {
    padding: 10px 20px;
    border: none;
    background-color: var(--primary-color);
    color: white;
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.3s ease;
}

button:hover {
    opacity: 0.9;
}

/* Inputs */
input {
    width: 60px;
    padding: 5px;
    text-align: center;
    margin: 0 5px;
}

/* Laps */
.laps {
    max-height: 200px;
    overflow-y: auto;
    margin-top: 20px;
}

.lap {
    padding: 10px;
    border-bottom: 1px solid var(--text-color);
}