:root {
    --primary: #25D366;
    --secondary: #128C7E;
    --bg: #f5f5f5;
    --card: #ffffff;
    --text: #333333;
    --border: #dddddd;
    --completed: #4CAF50;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    padding: 20px;
}

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

header {
    text-align: center;
    margin-bottom: 30px;
}

.logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 15px;
}

.site-logo {
    height: 50px;
    width: auto;
}

.panel {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.task-form, .task-list, .settings {
    background: var(--card);
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.task-form {
    flex: 1;
}

.task-list {
    flex: 2;
}

h2 {
    margin-bottom: 15px;
    color: var(--secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.form-group {
    margin-bottom: 15px;
}

input[type="text"],
input[type="time"],
input[type="tel"],
input[type="number"] {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border);
    border-radius: 4px;
}

button {
    background: var(--primary);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 4px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

#taskList {
    list-style: none;
}

#taskList li {
    padding: 10px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
}

.whatsapp-fallback {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
}

.whatsapp-button {
    background: var(--primary);
    color: white;
    padding: 12px 20px;
    border-radius: 50px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

@media (max-width: 768px) {
    .panel {
        flex-direction: column;
    }
}