:root {
    color-scheme: light dark;
    --bg: #f0f0f0;
    --text: #1f1f1f;
    --card: #ffffff;
    --accent: #1a73e8;
    --shadow: rgba(0, 0, 0, 0.12);
}

html[data-theme="dark"] {
    --bg: #121212;
    --text: #f5f5f5;
    --card: #1f1f1f;
    --accent: #8ab4f8;
    --shadow: rgba(0, 0, 0, 0.4);
}

body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--bg);
    color: var(--text);
}

.container {
    text-align: center;
    background: var(--card);
    padding: 30px 32px;
    border-radius: 16px;
    box-shadow: 0 10px 30px var(--shadow);
    width: min(520px, 92vw);
}

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
}

.header h1 {
    margin: 0;
    font-size: 24px;
}

.numbers {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--card);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    color: var(--text);
    border: 1px solid var(--shadow);
}

button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    border: 1px solid var(--shadow);
    border-radius: 10px;
    background: var(--card);
    color: var(--text);
}

button:hover {
    border-color: var(--accent);
}

.theme-toggle {
    padding: 8px 14px;
    font-size: 14px;
}

.inquiry {
    margin-top: 28px;
    text-align: left;
    border-top: 1px solid var(--shadow);
    padding-top: 20px;
}

.inquiry h2 {
    margin: 0 0 12px 0;
    font-size: 18px;
}

.inquiry-form {
    display: grid;
    gap: 10px;
}

.inquiry-form label {
    font-size: 14px;
    font-weight: 600;
}

.inquiry-form input,
.inquiry-form textarea {
    width: 100%;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--shadow);
    background: var(--card);
    color: var(--text);
    font-size: 14px;
    box-sizing: border-box;
}

.inquiry-form input:focus,
.inquiry-form textarea:focus {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

.inquiry-form button {
    margin-top: 6px;
}