:root {
    --primary-color: #00ff55;
    --primary-dark: #00cc44;
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --text-muted: #a0a0a0;
    --danger-color: #ff4d4d;
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: var(--primary-color);
}

a:hover {
    color: var(--primary-dark);
}

.container {
    width: 100%;
    max-width: 600px; /* Mobile first focus, but readable on desktop */
    margin: 0 auto;
    padding: 20px;
}

h1, h2, h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-muted);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
input[type="tel"],
select,
textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #333;
    border-radius: 5px;
    background-color: #2a2a2a;
    color: #fff;
    font-size: 16px;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
}

button, .btn {
    display: inline-block;
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color);
    color: #000;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    text-align: center;
    transition: background 0.3s;
    text-transform: uppercase;
}

button:hover, .btn:hover {
    background-color: var(--primary-dark);
}

.btn-small {
    width: auto;
    padding: 5px 10px;
    font-size: 14px;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #cc0000;
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

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

/* Cards */
.card {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    border-left: 4px solid var(--primary-color);
}

.card h3 {
    margin-top: 0;
    color: #fff;
}

/* Motivational Section */
.motivational {
    text-align: center;
    padding: 20px;
    background: linear-gradient(45deg, #000, #1a1a1a);
    border-radius: 8px;
    margin-bottom: 20px;
}

.countdown-timer {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
    margin: 10px 0;
}

/* Checkbox Groups */
.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    background: #2a2a2a;
    padding: 5px 10px;
    border-radius: 4px;
}

.checkbox-item input {
    margin-right: 5px;
}

/* Alert/Message */
.alert {
    padding: 10px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    margin-bottom: 15px;
    text-align: center;
}

.alert-success {
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

.alert-error {
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
}

/* Header/Nav */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 20px;
    border-bottom: 1px solid #333;
    margin-bottom: 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}