/* お問い合わせフォーム共通スタイル（ZIKUX） */
:root {
    --bg:     #0b0d12;
    --bg2:    #121620;
    --bg3:    #171c27;
    --accent: #35d8ff;
    --accent-d:#1fb6e0;
    --white:  #ffffff;
    --text:   #d8dde7;
    --dim:    #a6adbb;
    --border: rgba(255,255,255,0.10);
    --err:    #ff4b5c;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background:
        radial-gradient(circle at 75% 0%, rgba(53,216,255,.13), transparent 28%),
        radial-gradient(circle at 18% 18%, rgba(255,75,92,.10), transparent 30%),
        var(--bg);
    color: var(--text);
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.7;
}
a { color: inherit; text-decoration: none; }

/* header */
.c-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    background: rgba(11,13,18,.78);
    backdrop-filter: blur(18px);
}
.c-header .c-logo img { height: 28px; display: block; }
.c-header .c-back {
    font-size: 13px; letter-spacing: 1px; color: var(--dim);
    border: 1px solid var(--border); border-radius: 6px; padding: 8px 14px;
    transition: .2s;
}
.c-header .c-back:hover { color: var(--white); border-color: var(--accent); }

/* main */
.c-main { max-width: 760px; margin: 0 auto; padding: 48px 20px 80px; }
.c-title { text-align: center; margin-bottom: 8px; }
.c-title h1 {
    font-size: 28px; color: var(--white); margin: 0 0 6px;
    letter-spacing: 2px; font-weight: 900;
}
.c-title .en { display: block; font-size: 12px; letter-spacing: 4px; color: var(--accent); }
.c-lead { text-align: center; color: var(--dim); font-size: 14px; margin-bottom: 36px; }

.c-card {
    background: var(--bg2); border: 1px solid var(--border);
    border-radius: 12px; padding: 32px;
}

.c-row { margin-bottom: 22px; }
.c-row label {
    display: block; font-size: 14px; color: var(--white);
    font-weight: 700; margin-bottom: 8px;
}
.c-row label .req {
    display: inline-block; font-size: 11px; color: #04222b; background: var(--accent);
    border-radius: 4px; padding: 1px 7px; margin-left: 8px; vertical-align: middle;
    letter-spacing: 1px; font-weight: 700;
}
.c-row label .opt {
    display: inline-block; font-size: 11px; color: #fff; background: var(--border);
    border-radius: 4px; padding: 1px 7px; margin-left: 8px; vertical-align: middle;
    letter-spacing: 1px; font-weight: 700;
}
.c-row input[type=text],
.c-row input[type=email],
.c-row select,
.c-row textarea {
    width: 100%; padding: 12px 14px; font-size: 15px;
    background: var(--bg3); color: var(--white);
    border: 1px solid var(--border); border-radius: 8px;
    font-family: inherit; outline: none; transition: border-color .2s;
}
.c-row input:focus, .c-row select:focus, .c-row textarea:focus { border-color: var(--accent); }
.c-row textarea { min-height: 140px; resize: vertical; }
.c-row .iserr { border-color: var(--err); background: rgba(255,75,92,0.06); }
.c-err { display: block; color: var(--err); font-size: 12px; margin-top: 6px; }
.c-note { display: block; color: var(--dim); font-size: 12px; margin-top: 6px; }

.c-grid { display: flex; gap: 16px; }
.c-grid .c-row { flex: 1; }
.c-readonly {
    width: 100%; padding: 12px 14px; font-size: 15px; color: var(--white);
    background: var(--bg3); border: 1px solid var(--border); border-radius: 8px;
    min-height: 46px; white-space: pre-wrap; word-break: break-word;
}

.c-btns { display: flex; gap: 14px; justify-content: center; margin-top: 32px; }
.c-btn {
    cursor: pointer; border: none; font-family: inherit;
    font-size: 15px; font-weight: 700; letter-spacing: 1px;
    padding: 14px 36px; border-radius: 8px; transition: .2s;
}
.c-btn-primary { background: linear-gradient(135deg, var(--accent-d), var(--accent)); color: #04222b; }
.c-btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 24px rgba(53,216,255,.25); }
.c-btn-sub { background: transparent; color: var(--text); border: 1px solid var(--border); }
.c-btn-sub:hover { color: var(--white); border-color: var(--accent); }

.c-done { text-align: center; padding: 40px 0; }
.c-done .ico { font-size: 48px; color: var(--accent); margin-bottom: 16px; }
.c-done p { color: var(--text); font-size: 15px; }

/* footer */
.c-footer {
    text-align: center; padding: 28px 20px;
    border-top: 1px solid var(--border); color: var(--dim); font-size: 12px;
}

@media (max-width: 600px) {
    .c-card { padding: 22px; }
    .c-grid { flex-direction: column; gap: 0; }
    .c-btns { flex-direction: column-reverse; }
    .c-btn { width: 100%; }
}