/* ログイン画面の最小スタイル。各プロダクトのブランドに合わせる余地を残し、装飾は控えめにする。 */
:root {
    --bg: #f6f7f9;
    --surface: #ffffff;
    --border: #e2e5ea;
    --text: #1a1d21;
    --text-muted: #6b7280;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --error-bg: #fef2f2;
    --error-text: #b91c1c;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #14161a;
        --surface: #1c1f24;
        --border: #2d3238;
        --text: #e8eaed;
        --text-muted: #9aa1ab;
        --accent: #60a5fa;
        --accent-hover: #93c5fd;
        --error-bg: #2a1416;
        --error-text: #fca5a5;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif;
    line-height: 1.6;
}

.card {
    width: 100%;
    max-width: 420px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
}

.card-header {
    margin-bottom: 24px;
}

.brand {
    font-size: 13px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 8px;
}

h1 {
    font-size: 20px;
    margin: 0;
}

label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
}

input[type="email"],
input[type="text"],
select {
    width: 100%;
    padding: 10px 12px;
    font-size: 15px;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
}

input:focus,
select:focus {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

.otp-input {
    letter-spacing: 0.4em;
    text-align: center;
    font-size: 22px;
}

button {
    width: 100%;
    padding: 11px 16px;
    margin-top: 16px;
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    background: var(--accent);
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

button:hover:not(:disabled) {
    background: var(--accent-hover);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

button.secondary {
    color: var(--text);
    background: transparent;
    border: 1px solid var(--border);
}

.social {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 8px;
}

.social a {
    display: block;
    padding: 11px 16px;
    text-align: center;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 24px 0 16px;
    font-size: 13px;
    color: var(--text-muted);
}

.divider::before,
.divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--border);
}

.hint {
    margin-top: 12px;
    font-size: 13px;
    color: var(--text-muted);
}

.error {
    margin-bottom: 16px;
    padding: 10px 12px;
    font-size: 14px;
    color: var(--error-text);
    background: var(--error-bg);
    border-radius: 8px;
}

.hidden {
    display: none;
}

.org-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.org-list button {
    margin-top: 0;
    text-align: left;
    color: var(--text);
    background: transparent;
    border: 1px solid var(--border);
}

.org-list button:hover:not(:disabled) {
    background: var(--bg);
}

.org-slug {
    display: block;
    font-size: 12px;
    font-weight: 400;
    color: var(--text-muted);
}