:root {
    --bg: #f4f6f9;
    --card: #ffffff;
    --text: #1f2933;
    --muted: #616e7c;
    --border: #d9dee5;
    --primary: #1d4ed8;
    --primary-dark: #1e40af;
    --error-bg: #fdecec;
    --error-text: #9b1c1c;
    --success: #15803d;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

.wrap { max-width: 560px; margin: 0 auto; padding: 0 16px; }

.site-header { background: var(--primary); color: #fff; padding: 14px 0; margin-bottom: 32px; }
.brand { font-weight: 700; font-size: 1.25rem; letter-spacing: .02em; }

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 28px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .04);
}

h1 { margin: 0 0 6px; font-size: 1.5rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }

form { margin-top: 20px; }
label { display: block; font-weight: 600; margin: 16px 0 6px; }

input[type=text], input[type=email], input[type=tel] {
    width: 100%;
    padding: 10px 12px;
    font-size: 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
}
input:focus { outline: 2px solid var(--primary); outline-offset: 1px; border-color: var(--primary); }

.file-drop {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 400;
    margin: 0 0 4px;
    padding: 14px;
    border: 2px dashed var(--border);
    border-radius: 6px;
    cursor: pointer;
    overflow: hidden;
}
.file-drop:hover { border-color: var(--primary); }
.file-drop input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.file-drop span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-drop:focus-within { border-color: var(--primary); }

.btn {
    display: inline-block;
    margin-top: 24px;
    padding: 12px 22px;
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    background: var(--primary);
    border: 0;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
}
.btn:hover { background: var(--primary-dark); }
.btn:disabled { opacity: .6; cursor: wait; }
form .btn { width: 100%; }

.alert {
    background: var(--error-bg);
    color: var(--error-text);
    border-radius: 6px;
    padding: 12px 16px;
    margin-top: 16px;
}
.alert ul { margin: 0; padding-left: 18px; }
.field-error { color: var(--error-text); margin: 8px 0 0; }

.success { text-align: center; }
.tick {
    width: 56px; height: 56px; margin: 0 auto 12px;
    border-radius: 50%;
    background: var(--success); color: #fff;
    font-size: 28px; line-height: 56px;
}
.ref { margin: 20px 0; }
.ref strong { display: block; font-size: 2rem; color: var(--primary); }

footer { padding: 24px 16px; text-align: center; }