:root {
    --primary-color: #3a86ff;
    --accent-color: #4361ee;
    --dark-gray: #343a40;
    --medium-gray: #6c757d;
    --light-gray: #f8f9fa;
    --success-color: #38b000;
    --info-color: #00b4d8;
    --warning-color: #ffbe0b;
    --error-color: #ff006e;
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: #f5f7fa;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h1 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 28px;
    text-align: center;
}

.api-key-container {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

#api-key {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--medium-gray);
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s;
}

#api-key:focus {
    outline: none;
    border-color: var(--accent-color);
}

.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 24px;
    font-size: 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s;
    font-weight: 500;
}

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

.btn-block {
    display: block;
    width: 100%;
}

.stats-container {
    display: flex;
    gap: 15px;
    margin: 25px 0;
    flex-wrap: wrap;
}

.stat-card {
    flex: 1;
    min-width: 120px;
    background-color: white;
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    padding: 16px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.stat-card:nth-child(1) {
    border-top: 4px solid var(--primary-color);
}
.stat-card:nth-child(2) {
    border-top: 4px solid var(--success-color);
}
.stat-card:nth-child(3) {
    border-top: 4px solid var(--warning-color);
}

.stat-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--medium-gray);
    margin-bottom: 8px;
}

.stat-title i {
    font-size: 16px;
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
}

.result-container {
    margin-top: 15px;
    padding: 16px;
    border-radius: 8px;
    background-color: var(--light-gray);
}

.token-container {
    position: relative;
    background: white;
    padding: 12px;
    border-radius: 6px;
    margin: 10px 0;
}

#token-input {
    width: 100%;
    padding: 8px 12px;
    padding-right: 80px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: monospace;
    font-size: 14px;
    letter-spacing: 1px;
}

.token-controls {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    gap: 8px;
}

.token-btn {
    background: var(--light-gray);
    border: none;
    padding: 6px 10px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.2s;
}

.token-btn:hover {
    background: var(--medium-gray);
    color: white;
}

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

.count-animation {
    transition: all 0.5s ease-out;
    display: inline-block;
}

.no-key-result {
    text-align: center;
    padding: 30px 0;
    color: var(--error-color);
    font-weight: 500;
}

@media (max-width: 600px) {
    .container {
        padding: 20px;
    }

    .stat-card {
        min-width: calc(50% - 8px);
    }

    .token-controls {
        flex-direction: column;
        gap: 4px;
    }
}