:root {
    --ink: #171410;
    --paper: #efe8db;
    --card: #fbf7ef;
    --line: #d7ccba;
    --muted: #6e6558;
    --accent: #c2410c;
    --accent-dark: #9a3412;
    --danger: #8f1d1d;
    --focus: #0f4c5c;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    min-height: 100%;
    background: var(--paper);
    color: var(--ink);
    font: 15px/1.45 "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
}

a { color: var(--focus); text-decoration: none; }

.guest-body {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: radial-gradient(circle at top, #f7f1e4, var(--paper));
}

.guest-card {
    width: min(26rem, calc(100% - 2rem));
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 1.6rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: .7rem;
    color: inherit;
    text-decoration: none;
}

.brand-center { margin-bottom: 1.1rem; }

.brand-mark {
    display: grid;
    place-items: center;
    width: 2.2rem;
    height: 2.2rem;
    border: 1px solid #e8c07a;
    color: #9a3412;
    font: 700 .72rem/1 ui-monospace, "SF Mono", Menlo, monospace;
    letter-spacing: .08em;
}

.brand-name { font-weight: 650; }
.guest-title { margin: 0 0 .3rem; }
.muted { color: var(--muted); }

.stack { display: grid; gap: .85rem; }
.field { display: grid; gap: .3rem; }
.field span { font-size: .88rem; font-weight: 650; }

input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    border: 1px solid #cbbfaa;
    background: #fff;
    color: var(--ink);
    padding: .55rem .65rem;
    border-radius: 5px;
    font: inherit;
}

.check {
    display: flex;
    gap: .45rem;
    align-items: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #cbbfaa;
    background: #fff;
    color: var(--ink);
    padding: .48rem .8rem;
    border-radius: 5px;
    font: 650 14px/1.2 inherit;
    cursor: pointer;
}

.btn-primary {
    background: var(--accent);
    border-color: var(--accent-dark);
    color: #fff;
}

.flash {
    border-radius: 6px;
    padding: .75rem .9rem;
    margin-bottom: .9rem;
}

.flash ul { margin: 0; padding-left: 1.1rem; }
.flash-err { background: #f8e4e0; color: var(--danger); }