:root {
    --bg: #f0f4f9;
    --sur: #ffffff;
    --sur2: #f8fafc;
    --bdr: #e2e8f2;
    --h: #0d1526;
    --b: #2d3a4f;
    --m: #607088;
    --l: #94a3b8;
    --teal: #0d7a6e;
    --teal-l: #e6f4f2;
    --teal-d: #0a6259;
    --red: #dc2626;
    --red-l: #fef2f2;
    --green: #059669;
    --green-l: #ecfdf5;
    --amber: #d97706;
    --amber-l: #fffbeb;
    --f: 'DM Sans', sans-serif;
    --fs: 'Instrument Serif', serif;
    --fm: 'JetBrains Mono', monospace;
    --r: 14px;
    --rsm: 8px;
    --s1: 0 1px 3px rgba(13, 21, 38, .06);
    --s2: 0 4px 16px rgba(13, 21, 38, .09);
    --s3: 0 10px 40px rgba(13, 21, 38, .13);
    --s4: 0 24px 64px rgba(13, 21, 38, .18);
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html,
body {
    min-height: 100vh;
    background: var(--bg);
    font-family: var(--f);
}

/* ── Page layout ── */
body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 30px 16px 60px;
}

/* ── Logo / brand ── */
.brand {
    text-align: center;
    margin-bottom: 28px;
}

.brand-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--teal), var(--teal-d));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: #fff;
    margin-bottom: 12px;
    box-shadow: 0 8px 24px rgba(13, 122, 110, .35);
}

.brand h1 {
    font-family: var(--fs);
    font-size: 26px;
    color: var(--h);
    letter-spacing: -.4px;
}

.brand h1 em {
    color: var(--teal);
    font-style: italic;
}

.brand p {
    font-size: 13px;
    color: var(--m);
    margin-top: 4px;
}

/* ── Progress bar ── */
.prog-wrap {
    width: 100%;
    max-width: 700px;
    margin-bottom: 24px;
}

.prog-steps {
    display: flex;
    justify-content: space-between;
    position: relative;
}

.prog-steps::before {
    content: '';
    position: absolute;
    top: 18px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--bdr);
    z-index: 0;
}

.prog-fill {
    position: absolute;
    top: 18px;
    left: 0;
    height: 2px;
    background: var(--teal);
    z-index: 1;
    transition: width .5s ease;
}

.pstep {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    position: relative;
    z-index: 2;
    flex: 1;
}

.pstep-dot {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    border: 2px solid var(--bdr);
    background: var(--sur);
    color: var(--l);
    transition: all .3s;
}

.pstep.active .pstep-dot {
    border-color: var(--teal);
    background: var(--teal);
    color: #fff;
    box-shadow: 0 3px 12px rgba(13, 122, 110, .35);
}

.pstep.done .pstep-dot {
    border-color: var(--teal);
    background: var(--teal-l);
    color: var(--teal);
}

.pstep-lbl {
    font-size: 11px;
    font-weight: 600;
    color: var(--l);
    white-space: nowrap;
    transition: color .3s;
}

.pstep.active .pstep-lbl {
    color: var(--teal);
}

.pstep.done .pstep-lbl {
    color: var(--teal);
}

/* ── Card ── */
.wcard {
    width: 100%;
    max-width: 700px;
    background: var(--sur);
    border-radius: var(--r);
    border: 1px solid var(--bdr);
    box-shadow: var(--s2);
    overflow: hidden;
}

.wcard-hd {
    padding: 24px 28px 18px;
    border-bottom: 1px solid var(--bdr);
    background: var(--sur2);
}

.wcard-hd .step-num {
    font-size: 11px;
    font-weight: 700;
    color: var(--teal);
    letter-spacing: .7px;
    text-transform: uppercase;
    margin-bottom: 5px;
}

.wcard-hd h2 {
    font-family: var(--fs);
    font-size: 22px;
    color: var(--h);
    letter-spacing: -.3px;
}

.wcard-hd h2 em {
    color: var(--teal);
    font-style: italic;
}

.wcard-hd p {
    font-size: 13px;
    color: var(--m);
    margin-top: 5px;
}

.wcard-body {
    padding: 24px 28px;
}

.wcard-ft {
    padding: 16px 28px;
    border-top: 1px solid var(--bdr);
    background: var(--sur2);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ── Panels ── */
.wpanel {
    display: none;
}

.wpanel.active {
    display: block;
}

/* ── System check table ── */
.check-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.check-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-radius: var(--rsm);
    border: 1px solid var(--bdr);
    background: var(--sur2);
    font-size: 13px;
}

.check-row .cl {
    display: flex;
    align-items: center;
    gap: 9px;
    color: var(--b);
    font-weight: 500;
}

.check-row .cv {
    font-family: var(--fm);
    font-size: 12px;
    color: var(--m);
}

.check-ok .ci {
    color: var(--green);
}

.check-fail .ci {
    color: var(--red);
}

.check-fail {
    border-color: #fca5a5;
    background: var(--red-l);
}

/* ── Form fields ── */
.fsec {
    margin-bottom: 20px;
}

.fsec-title {
    font-size: 11px;
    font-weight: 700;
    color: var(--teal);
    letter-spacing: .7px;
    text-transform: uppercase;
    margin-bottom: 12px;
    padding-bottom: 7px;
    border-bottom: 1.5px solid var(--teal-l);
    display: flex;
    align-items: center;
    gap: 6px;
}

.fgrid {
    display: grid;
    gap: 12px;
}

.fg2 {
    grid-template-columns: 1fr 1fr;
}

@media(max-width:560px) {
    .fg2 {
        grid-template-columns: 1fr;
    }
}

.fld {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.fld label {
    font-size: 12px;
    font-weight: 600;
    color: var(--b);
}

.fld label .req {
    color: var(--red);
    margin-left: 2px;
}

.fld input,
.fld select {
    width: 100%;
    height: 38px;
    padding: 0 12px;
    border: 1.5px solid var(--bdr);
    border-radius: var(--rsm);
    font-size: 13px;
    color: var(--b);
    background: var(--sur);
    outline: none;
    transition: border-color .15s, box-shadow .15s;
}

.fld input:focus,
.fld select:focus {
    border-color: var(--teal);
    box-shadow: 0 0 0 3px rgba(13, 122, 110, .08);
}

.fld input.is-invalid,
.fld select.is-invalid {
    border-color: var(--red) !important;
}

.fld .err {
    font-size: 11px;
    color: var(--red);
    margin-top: 2px;
}

.fld .hint {
    font-size: 11px;
    color: var(--l);
    margin-top: 2px;
}

/* pw toggle */
.pw-wrap {
    position: relative;
}

.pw-wrap input {
    padding-right: 40px;
}

.pw-toggle {
    position: absolute;
    right: 11px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--l);
    cursor: pointer;
    font-size: 14px;
}

.pw-toggle:hover {
    color: var(--teal);
}

/* ── Connection test banner ── */
.conn-banner {
    display: none;
    padding: 10px 14px;
    border-radius: var(--rsm);
    font-size: 13px;
    font-weight: 500;
    margin-top: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.conn-ok {
    background: var(--green-l);
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.conn-fail {
    background: var(--red-l);
    color: var(--red);
    border: 1px solid #fca5a5;
}

.conn-banner i {
    font-size: 15px;
}

/* ── Buttons ── */
.ibtn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 20px;
    border-radius: var(--rsm);
    font-size: 13.5px;
    font-weight: 600;
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: all .15s;
    white-space: nowrap;
}

.ibtn-primary {
    background: var(--teal);
    color: #fff;
    border-color: var(--teal);
}

.ibtn-primary:hover {
    background: var(--teal-d);
    color: #fff;
}

.ibtn-primary:disabled {
    opacity: .55;
    cursor: not-allowed;
}

.ibtn-ghost {
    background: var(--sur);
    color: var(--b);
    border-color: var(--bdr);
}

.ibtn-ghost:hover {
    border-color: var(--teal);
    color: var(--teal);
}

.ibtn-sm {
    padding: 6px 14px;
    font-size: 12.5px;
}

/* ── Install log ── */
.ilog {
    background: #0d1526;
    border-radius: var(--rsm);
    padding: 16px;
    font-family: var(--fm);
    font-size: 12px;
    max-height: 280px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.ilog::-webkit-scrollbar {
    width: 4px;
}

.ilog::-webkit-scrollbar-thumb {
    background: #334155;
    border-radius: 10px;
}

.log-row {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #94a3b8;
}

.log-row .lg-ico {
    width: 16px;
    flex-shrink: 0;
}

.log-row.ok .lg-ico {
    color: #4ade80;
}

.log-row.warn .lg-ico {
    color: #fbbf24;
}

.log-row.err .lg-ico {
    color: #f87171;
}

.log-row.spin .lg-ico {
    color: #60a5fa;
    animation: spin .7s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.log-row .lg-txt {
    color: #e2e8f0;
}

/* ── Progress ring ── */
.prog-ring {
    text-align: center;
    padding: 20px 0;
}

.prog-ring-svg {
    transform: rotate(-90deg);
}

.prog-ring-bg {
    fill: none;
    stroke: var(--bdr);
    stroke-width: 6;
}

.prog-ring-fg {
    fill: none;
    stroke: var(--teal);
    stroke-width: 6;
    stroke-linecap: round;
    transition: stroke-dashoffset .4s;
}

.ring-num {
    font-family: var(--fm);
    font-size: 22px;
    font-weight: 700;
    fill: var(--h);
}

.ring-lbl {
    font-size: 11px;
    fill: var(--m);
}

/* ── Complete screen ── */
.complete-wrap {
    text-align: center;
    padding: 10px 0 20px;
}

.complete-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--green-l);
    color: var(--green);
    font-size: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    box-shadow: 0 6px 24px rgba(5, 150, 105, .2);
}

.complete-wrap h3 {
    font-family: var(--fs);
    font-size: 24px;
    color: var(--h);
    margin-bottom: 8px;
}

.complete-wrap p {
    font-size: 13.5px;
    color: var(--m);
    max-width: 420px;
    margin: 0 auto 20px;
}

.info-pills {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 24px;
}

.ipill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    background: var(--teal-l);
    color: var(--teal);
    border: 1px solid var(--teal-l);
}

/* ── Alert box ── */
.alert {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 16px;
    border-radius: var(--rsm);
    font-size: 13px;
    margin-bottom: 16px;
}

.alert i {
    font-size: 15px;
    flex-shrink: 0;
    margin-top: 1px;
}

.alert-info {
    background: var(--teal-l);
    color: var(--teal-d);
    border: 1px solid var(--teal-ml, #9dd8d2);
}

.alert-warn {
    background: var(--amber-l);
    color: var(--amber);
    border: 1px solid #fde68a;
}

.prog-ring-svg {
    transform: rotate(-90deg);
}

.ring-num,
.ring-lbl {
    transform: rotate(90deg);
    transform-origin: 50% 50%;
}