:root {
    /* 3M SIBG Channel Summit — red / black / white palette */
    --ink: #1A1A1A;
    --navy: #D10411;
    --navy-deep: #1A1A1A;
    --gold: #D10411;
    --gold-soft: #FBECEC;
    --bg: #F2F2F4;
    --card: #FFFFFF;
    --line: #D9D9DD;
    --mut: #5F6368;
    --ok: #1E7A5A;
    --ok-soft: #E2F1EA;
    --err: #D10411;
    --err-soft: #FCE8E6;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--ink);
    font-family: "Helvetica Neue", Helvetica, Arial, "Segoe UI", system-ui, sans-serif;
    font-size: 15px;
    line-height: 1.5;
}

.container { max-width: 72rem; margin: 0 auto; padding: 0 1rem; }
.container.narrow { max-width: 36rem; }
.center { text-align: center; }
.py-10 { padding-top: 2.5rem; padding-bottom: 2.5rem; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
.py-16 { padding-top: 4rem; padding-bottom: 4rem; }
.mb-1 { margin-bottom: .25rem; }
.mb-2 { margin-bottom: .5rem; }
.mb-3 { margin-bottom: .75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-5 { margin-bottom: 1.25rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mt-1 { margin-top: .25rem; }
.mt-2 { margin-top: .5rem; }
.text-left { text-align: left; }
.text-xs { font-size: .75rem; }
.mono { font-family: ui-monospace, monospace; }
.muted { color: var(--mut); }
.muted-xs { font-size: .75rem; color: var(--mut); text-transform: uppercase; letter-spacing: .08em; font-weight: 600; }

.site-header { background: #000; border-bottom: 3px solid var(--gold); overflow: visible; }
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    gap: .75rem; padding: .875rem 0;
}
.brand {
    display: flex; align-items: center; gap: .75rem;
    flex: 1 1 auto; min-width: 0; max-width: 100%;
}
.brand-logo {
    display: block; flex: 0 0 auto; width: 2rem; height: auto;
}
.brand-copy {
    display: block !important;
    visibility: visible !important;
    min-width: 0; max-width: 100%; overflow: visible;
}
.brand-title {
    margin: 0; color: #fff; font-weight: 700; letter-spacing: .02em;
    line-height: 1.3; font-size: 1rem;
    overflow-wrap: anywhere; word-break: break-word;
}
.brand-title .brand-3m { color: var(--gold); }
.brand-sub {
    margin: .125rem 0 0; font-size: .75rem; color: #B9B9BE; line-height: 1.4;
    overflow-wrap: anywhere;
}
.header-link {
    color: #D2D2D2; font-size: .75rem; font-weight: 600; text-decoration: underline;
    flex: 0 0 auto; white-space: nowrap;
}
@media (max-width: 639px) {
    .header-inner {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: start;
        column-gap: .75rem;
        row-gap: .5rem;
    }
    .brand { grid-column: 1; grid-row: 1; width: 100%; max-width: 100%; }
    .header-link { grid-column: 2; grid-row: 1; justify-self: end; padding-top: .25rem; }
    .brand-title { font-size: .8125rem; }
    .brand-sub { font-size: .6875rem; }
}

.h2 { margin: 0; color: var(--navy); font-size: 1.5rem; }
.emoji-lg { font-size: 2.5rem; margin-bottom: .75rem; }
.ok-circle {
    width: 3.5rem; height: 3.5rem; border-radius: 50%; margin: 0 auto 1rem;
    background: var(--ok-soft); display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem;
}
.confirm-box { background: var(--navy-deep); border-radius: .5rem; padding: 1.5rem; }
.confirm-label { margin: 0; font-size: .75rem; text-transform: uppercase; letter-spacing: .12em; color: var(--gold); }
.confirm-id { margin: .25rem 0 0; font-size: 1.5rem; font-family: ui-monospace, monospace; font-weight: 700; color: #fff; }
.info-box { background: var(--gold-soft); color: var(--navy); border-radius: .5rem; padding: 1rem; }

.wizard-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 768px) {
    .wizard-grid { grid-template-columns: 16rem 1fr; gap: 2.5rem; }
}

.stepper { display: flex; flex-direction: row; gap: .25rem; overflow-x: auto; padding-bottom: .5rem; }
@media (min-width: 768px) { .stepper { flex-direction: column; overflow: visible; } }
.step-form { margin: 0; }
.step-btn {
    display: flex; align-items: center; gap: .75rem; width: 100%;
    border: none; background: transparent; border-radius: .375rem;
    padding: .5rem .75rem; text-align: left; cursor: pointer; min-width: 11rem;
    font: inherit; color: var(--ink);
}
.step-btn.active { background: var(--ink); color: #fff; }
.step-btn:disabled { opacity: .45; cursor: default; }
.step-dot {
    width: 1.5rem; height: 1.5rem; border-radius: 50%; display: inline-flex;
    align-items: center; justify-content: center; font-size: .75rem; font-weight: 700;
    border: 1px solid var(--line); background: #fff; color: var(--mut); flex-shrink: 0;
}
.step-btn.active .step-dot { background: var(--gold); color: #fff; border: none; }
.step-dot.done { background: var(--ok); color: #fff; border: none; }

.stage-card {
    background: var(--card); border: 1px solid var(--line); border-radius: .5rem;
    padding: 1.25rem 1.5rem;
}
@media (min-width: 768px) { .stage-card { padding: 2rem; } }
.stage-meta { margin: 0 0 .25rem; font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .12em; color: var(--gold); }
.stage-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: .25rem; }
.autosave-status { margin: 0; white-space: nowrap; }
.autosave-status.is-ok { color: var(--ok); }
.autosave-status.is-pending { color: var(--gold); }

.grid-2 { display: grid; grid-template-columns: 1fr; gap: 0 1.5rem; }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: 0 1rem; }
@media (min-width: 768px) {
    .grid-2 { grid-template-columns: 1fr 1fr; }
    .grid-3 { grid-template-columns: 1fr 1fr 1fr; }
}

.field-label { display: block; font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--mut); margin-bottom: .25rem; }
.req { color: var(--err); }
.field-input {
    width: 100%; padding: .625rem .75rem; border: 1px solid var(--line);
    border-radius: .375rem; font-size: .9375rem; color: var(--ink); background: #fff;
}
.field-input.is-error { border-color: var(--err); }
.field-hint { margin: .25rem 0 0; font-size: .75rem; color: var(--mut); }
.field-error { margin: .25rem 0 0; font-size: .75rem; color: var(--err); }

.reg-id-box {
    display: flex; align-items: center; justify-content: space-between;
    background: var(--gold-soft); border-radius: .375rem; padding: .75rem 1rem;
}
.reg-id { font-family: ui-monospace, monospace; font-weight: 700; color: var(--navy); }

.section-label {
    margin: 1.5rem 0 .75rem; font-size: .75rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: .12em; color: var(--gold);
}

.file-row { display: flex; align-items: center; gap: .75rem; flex-wrap: wrap; margin-top: .75rem; }
.file-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
    gap: .75rem;
    margin-bottom: .25rem;
}
.file-preview-card {
    position: relative;
    border: 1px solid var(--line);
    border-radius: .375rem;
    background: #fff;
    overflow: hidden;
}
.file-preview-remove {
    position: absolute;
    top: .35rem;
    right: .35rem;
    z-index: 2;
    width: 1.5rem;
    height: 1.5rem;
    border: none;
    border-radius: 999px;
    background: rgba(17, 24, 39, .82);
    color: #fff;
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}
.file-preview-remove:hover { background: var(--err); }
.file-preview-link {
    display: block;
    text-decoration: none;
    color: inherit;
}
.file-preview-thumb,
.file-preview-frame,
.file-preview-fallback {
    display: block;
    width: 100%;
    height: 132px;
    border: 0;
    background: #FAFAF8;
}
.file-preview-thumb { object-fit: cover; }
.file-preview-fallback {
    display: flex;
    align-items: center;
    justify-content: center;
}
.file-preview-icon { font-size: 2rem; }
.file-preview-card.is-pending { opacity: .75; }
.file-uploading { margin-left: .25rem; }
.file-preview-name {
    margin: 0;
    padding: .45rem .55rem;
    font-size: .7rem;
    line-height: 1.3;
    color: var(--navy);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    border-top: 1px solid var(--line);
    background: #fff;
}

.checkbox-card {
    display: flex; gap: .75rem; padding: 1rem; border-radius: .375rem;
    border: 1px solid var(--line); background: #fff; cursor: pointer;
}
.checkbox-card.checked { background: var(--ok-soft); }
.checkbox-card.has-error { border-color: var(--err); }

.form-actions {
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: .75rem; margin-top: 2rem; padding-top: 1.25rem; border-top: 1px solid var(--line);
}
.btn-group { display: flex; gap: .5rem; flex-wrap: wrap; }

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: .625rem 1.25rem; border-radius: .375rem; border: none;
    font-size: .875rem; font-weight: 600; cursor: pointer; text-decoration: none;
}
.btn-primary { background: var(--navy); color: #fff; }
.btn-gold { background: var(--gold); color: #fff; }
.btn-ghost { background: transparent; color: var(--navy); border: 1px solid var(--line); }
.btn-file { background: var(--gold-soft); color: var(--navy); border: 1px solid var(--gold); cursor: pointer; }
.btn-file input { display: none; }
.btn-sm { padding: .375rem .75rem; font-size: .75rem; }
.btn-danger { background: var(--err); color: #fff; }

.msg-ok { margin-top: .75rem; font-size: .75rem; color: var(--ok); }

.center-actions { display: flex; flex-wrap: wrap; gap: .75rem; justify-content: center; align-items: center; }
.inline-form { display: inline; margin: 0; }

.review-note { padding: .75rem 1rem; border-radius: .375rem; background: var(--gold-soft); color: var(--navy); font-size: .875rem; }
.review-block { border: 1px solid var(--line); border-radius: .375rem; background: #fff; overflow: hidden; }
.review-head {
    display: flex; align-items: center; justify-content: space-between;
    padding: .5rem 1rem; background: #FAFAF8; border-bottom: 1px solid var(--line);
    font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--navy);
}
.review-body { padding: .75rem 1rem; }
.review-row { display: flex; justify-content: space-between; gap: 1rem; padding: .125rem 0; font-size: .875rem; }
.review-val { font-weight: 500; text-align: right; }
.link-gold, a.link-gold { background: none; border: none; color: var(--gold); font-size: .75rem; font-weight: 600; text-decoration: underline; cursor: pointer; }

.site-footer { text-align: center; padding: 1.5rem; font-size: .75rem; color: var(--mut); line-height: 1.6; }

/* Admin */
.admin-wrap { padding: 1.5rem 0 3rem; }
.admin-head { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 1rem; margin-bottom: 1.25rem; }
.tabs { display: flex; gap: .25rem; overflow-x: auto; margin-bottom: 1.5rem; padding-bottom: .25rem; }
.tab {
    padding: .5rem .75rem; border-radius: .375rem; border: 1px solid var(--line);
    background: #fff; color: var(--mut); font-size: .75rem; font-weight: 600;
    text-decoration: none; white-space: nowrap;
}
.tab.active { background: var(--navy); color: #fff; border-color: var(--navy); }

.stats { display: flex; flex-wrap: wrap; gap: .75rem; margin-bottom: 1.25rem; }
.stat-card {
    flex: 1; min-width: 8rem; background: #fff; border: 1px solid var(--line);
    border-radius: .5rem; padding: 1rem;
}
.stat-val { margin: 0; font-size: 1.875rem; font-weight: 700; color: var(--navy); }
.stat-label { margin: .25rem 0 0; font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--mut); }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: .375rem; }
table { width: 100%; border-collapse: collapse; font-size: .875rem; }
thead tr { background: var(--navy-deep); }
th { text-align: left; padding: .5rem .75rem; color: #fff; font-size: .75rem; text-transform: uppercase; letter-spacing: .04em; white-space: nowrap; }
td { padding: .5rem .75rem; border-top: 1px solid var(--line); white-space: nowrap; }
tbody tr:nth-child(even) { background: #FAFAF8; }

.report-head { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: .75rem; margin-bottom: 1rem; }
.day-badge {
    display: inline-flex; align-items: center; padding: .375rem .75rem; border-radius: .375rem;
    background: var(--gold); color: #fff; font-size: .75rem; font-weight: 700; letter-spacing: .04em;
}
.login-box { max-width: 24rem; margin: 4rem auto; padding: 0 1rem; }
.alert { padding: .75rem 1rem; border-radius: .375rem; margin-bottom: 1rem; font-size: .875rem; }
.alert-ok { background: var(--ok-soft); color: var(--ok); }
.alert-err { background: var(--err-soft); color: var(--err); }

.hidden-carry {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}