/* iOutlet Trade-In — Apple-inspired, mirrors Quiz palette */
:root {
    --ink:          #1d1d1f;
    --ink-soft:     #6e6e73;
    --bg:           #fbfbfd;
    --soft:         #f5f5f7;
    --line:         #d2d2d7;
    --accent:       #0071e3;
    --accent-hover: #0077ed;
    --green:        #34c759;
    --red:          #ff3b30;
    --radius-l:     18px;
    --radius-m:     12px;
    --radius-s:     8px;
    --space-1:      8px;
    --space-2:      12px;
    --space-3:      16px;
    --space-4:      24px;
    --space-5:      32px;
    --space-6:      48px;
    --space-7:      64px;
    --space-8:      96px;
}

/* Root container */
#io-tradein-app {
    display: block;
    max-width: 720px;
    margin: 0 auto;
    padding: var(--space-8) 20px;
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Pro Display', 'Helvetica Neue', sans-serif;
    background: var(--bg);
    box-sizing: border-box;
}

#io-tradein-app * { box-sizing: border-box; }

/* Landing hero */
.io-tradein-landing {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
}
.io-tradein-landing h1 {
    font-size: 48px;
    line-height: 1.05;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin: 0 0 var(--space-3);
}
@media (max-width: 599px) {
    .io-tradein-landing h1 { font-size: 32px; }
}
.io-tradein-landing .sub {
    font-size: 19px;
    color: var(--ink-soft);
    line-height: 1.5;
    margin: 0 0 var(--space-4);
}
.io-tradein-cta {
    display: inline-block;
    height: 56px;
    line-height: 56px;
    padding: 0 var(--space-5);
    background: var(--accent);
    color: #fff;
    border: 0;
    border-radius: var(--radius-l);
    font-size: 17px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    text-decoration: none;
    transition: background 180ms;
}
.io-tradein-cta:hover { background: var(--accent-hover); }
.io-tradein-cta:disabled { opacity: .6; cursor: default; }
.io-tradein-landing .trust {
    font-size: 13px;
    color: var(--ink-soft);
    margin-top: var(--space-3);
}

/* Progress dots */
.io-tradein-progress {
    display: flex;
    gap: var(--space-1);
    justify-content: center;
    margin-bottom: var(--space-5);
}
.io-tradein-progress .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--line);
    transition: background 180ms;
}
.io-tradein-progress .dot.current { background: var(--accent); }
.io-tradein-progress .dot.done    { background: var(--ink); }

/* Question step */
.io-tradein-question h2 {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: -0.01em;
    text-align: center;
    margin: 0 0 var(--space-5);
    line-height: 1.15;
}
@media (max-width: 599px) {
    .io-tradein-question h2 { font-size: 22px; }
}

/* Brand options grid */
.io-tradein-options.brands {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}
@media (min-width: 768px) {
    .io-tradein-options.brands { grid-template-columns: repeat(4, 1fr); }
}

/* Memory options grid */
.io-tradein-options.mems {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}
@media (min-width: 768px) {
    .io-tradein-options.mems { grid-template-columns: repeat(3, 1fr); }
}

/* Option pill (brand + mem) */
.io-tradein-opt {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    color: var(--ink);
    border: 1px solid var(--line);
    border-radius: var(--radius-m);
    font-size: 17px;
    font-family: inherit;
    cursor: pointer;
    text-align: center;
    transition: transform 180ms, box-shadow 180ms;
}
.io-tradein-opt:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(0,0,0,.06);
}
.io-tradein-opt:active { transform: translateY(0); }

/* Grade options grid */
.io-tradein-options.grades {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}
@media (min-width: 768px) {
    .io-tradein-options.grades { grid-template-columns: 1fr 1fr; }
}
.io-tradein-grade-card {
    text-align: left;
    padding: var(--space-4);
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-m);
    cursor: pointer;
    font-family: inherit;
    transition: transform 180ms, box-shadow 180ms;
}
.io-tradein-grade-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(0,0,0,.06);
}
.io-tradein-grade-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin: 0;
}
.io-tradein-grade-card p {
    font-size: 14px;
    color: var(--ink-soft);
    margin: var(--space-1) 0 0;
}

/* Back button */
.io-tradein-back {
    display: block;
    margin-top: var(--space-4);
    background: transparent;
    color: var(--ink-soft);
    border: 0;
    padding: 10px 0;
    font-size: 15px;
    font-family: inherit;
    cursor: pointer;
}
.io-tradein-back:hover { color: var(--ink); }

/* Model select */
.io-tradein-select {
    display: block;
    width: 100%;
    height: 56px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-m);
    padding: 0 var(--space-3);
    font-size: 17px;
    font-family: inherit;
    color: var(--ink);
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}
.io-tradein-select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0,113,227,.25);
}

/* Estimate card */
.io-tradein-estimate {
    text-align: center;
    background: var(--soft);
    padding: var(--space-6);
    border-radius: var(--radius-l);
}
.io-tradein-estimate .label {
    font-size: 14px;
    color: var(--ink-soft);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.io-tradein-estimate .range {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    margin: var(--space-2) 0;
}
@media (max-width: 599px) {
    .io-tradein-estimate .range { font-size: 32px; }
}
.io-tradein-estimate .dash {
    font-size: 24px;
    font-weight: 400;
    color: var(--ink-soft);
    margin: 0 var(--space-1);
}
.io-tradein-estimate .firm-note {
    font-size: 14px;
    color: var(--ink-soft);
    margin-top: var(--space-2);
}
.io-tradein-estimate .bonus-note {
    font-size: 14px;
    color: var(--green);
    font-weight: 500;
    margin-top: var(--space-1);
}
.io-tradein-estimate .no-match {
    font-size: 16px;
    color: var(--ink-soft);
    font-style: italic;
}

/* Email capture */
.io-tradein-email {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}
.io-tradein-email h3 {
    font-size: 22px;
    font-weight: 600;
    margin: 0;
}
.io-tradein-email input[type="text"],
.io-tradein-email input[type="email"],
.io-tradein-email input[type="tel"] {
    display: block;
    width: 100%;
    height: 56px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-m);
    padding: 0 var(--space-3);
    font-size: 17px;
    font-family: inherit;
    color: var(--ink);
    -webkit-appearance: none;
    appearance: none;
}
.io-tradein-email input[type="text"]:focus,
.io-tradein-email input[type="email"]:focus,
.io-tradein-email input[type="tel"]:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0,113,227,.25);
}
.io-tradein-email label {
    font-size: 14px;
    color: var(--ink-soft);
    cursor: pointer;
}
.io-tradein-email-btn {
    display: block;
    width: 100%;
    height: 56px;
    background: var(--accent);
    color: #fff;
    border: 0;
    border-radius: var(--radius-l);
    font-size: 17px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: background 180ms;
}
.io-tradein-email-btn:hover { background: var(--accent-hover); }
.io-tradein-email-btn:disabled { opacity: .6; cursor: default; }
.io-tradein-email-msg {
    font-size: 14px;
    color: var(--ink-soft);
    min-height: 20px;
}

/* Email gate (required to unlock estimate) */
.io-tradein-gate {
    max-width: 520px;
    margin: 0 auto;
    padding: var(--space-7) var(--space-3);
    text-align: center;
}
.io-tradein-gate-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px; height: 64px;
    border-radius: 50%;
    background: rgba(0,113,227,.08);
    color: var(--accent);
    margin-bottom: var(--space-3);
}
.io-tradein-gate h2 {
    margin: 0 0 var(--space-1);
    font-size: 28px;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--ink);
}
.io-tradein-gate-sub {
    margin: 0 0 var(--space-4);
    color: var(--ink-soft);
    font-size: 16px;
    line-height: 1.5;
}
.io-tradein-coupon-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-l);
    padding: var(--space-4);
    text-align: left;
}
.io-tradein-coupon-form { display: flex; flex-direction: column; gap: var(--space-2); }
.io-tradein-coupon-form input[type="email"] {
    width: 100%;
    height: 52px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-m);
    padding: 0 var(--space-3);
    font-size: 16px;
    font-family: inherit;
    color: var(--ink);
    -webkit-appearance: none;
}
.io-tradein-coupon-form input[type="email"]:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0,113,227,.2);
}
.io-tradein-consent {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 13px;
    color: var(--ink-soft);
    line-height: 1.4;
    cursor: pointer;
}
.io-tradein-consent input { margin-top: 3px; flex-shrink: 0; }
.io-tradein-coupon-btn {
    height: 52px;
    background: var(--accent);
    color: #fff;
    border: 0;
    border-radius: var(--radius-l);
    font-size: 16px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: background 180ms;
}
.io-tradein-coupon-btn:hover { background: var(--accent-hover); }
.io-tradein-coupon-btn:disabled { opacity: .6; cursor: default; }
.io-tradein-coupon-msg {
    margin: 4px 0 0;
    font-size: 13px;
    color: #d11d1d;
    min-height: 18px;
}
@media (prefers-color-scheme: dark) {
    .io-tradein-coupon-card { background: #1c1c1e; }
    .io-tradein-coupon-form input[type="email"] { background: #2a2a2c; color: var(--ink); }
}

/* Loading state */
.io-tradein-loading {
    text-align: center;
    padding: var(--space-8) 20px;
    color: var(--ink-soft);
    font-size: 16px;
}

/* Error state */
.io-tradein-error {
    text-align: center;
    padding: var(--space-6) 20px;
}
.io-tradein-error p {
    color: var(--ink-soft);
    margin-bottom: var(--space-4);
}

/* Accept page (server-rendered) */
.io-tradein-accept {
    max-width: 720px;
    margin: 0 auto;
    padding: var(--space-6) var(--space-3);
}
.io-tradein-accept-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-l);
    padding: var(--space-6);
}
.io-tradein-accept-card h1 {
    font-size: 28px;
    font-weight: 600;
    margin: 0 0 var(--space-1);
}
.io-tradein-accept-card .device {
    font-size: 17px;
    color: var(--ink-soft);
}
.io-tradein-accept-card .quote-label {
    font-size: 13px;
    text-transform: uppercase;
    color: var(--ink-soft);
    letter-spacing: 0.06em;
    margin-top: var(--space-4);
}
.io-tradein-accept-card .quote-amount {
    font-size: 64px;
    font-weight: 700;
    line-height: 1;
    margin-top: var(--space-1);
}

/* Payout fieldset */
.io-tradein-accept-card fieldset.payout {
    border: 0;
    padding: 0;
    margin-top: var(--space-5);
}
.io-tradein-accept-card fieldset.payout legend {
    font-size: 14px;
    color: var(--ink-soft);
}
.io-tradein-accept-card label.payout-credit,
.io-tradein-accept-card label.payout-bank {
    display: block;
    padding: var(--space-3);
    border: 1px solid var(--line);
    border-radius: var(--radius-m);
    margin-top: var(--space-2);
    cursor: pointer;
    transition: border-color 180ms;
}
.io-tradein-accept-card label.payout-credit:has(input:checked),
.io-tradein-accept-card label.payout-bank:has(input:checked) {
    border-color: var(--accent);
}
.io-tradein-accept-card .bonus {
    font-size: 13px;
    color: var(--green);
    font-weight: 500;
}

/* Accept CTA */
.io-tradein-accept-btn {
    display: block;
    width: 100%;
    height: 56px;
    background: var(--accent);
    color: #fff;
    border: 0;
    border-radius: var(--radius-l);
    font-size: 17px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    margin-top: var(--space-4);
    transition: background 180ms;
}
.io-tradein-accept-btn:hover { background: var(--accent-hover); }
.io-tradein-accept-btn:disabled { opacity: .6; cursor: default; }

/* Decline details */
.io-tradein-accept-card details.decline summary {
    text-align: center;
    font-size: 14px;
    color: var(--ink-soft);
    cursor: pointer;
    padding-top: var(--space-4);
    list-style: none;
}
.io-tradein-accept-card details.decline textarea {
    display: block;
    width: 100%;
    height: 80px;
    border: 1px solid var(--line);
    border-radius: var(--radius-m);
    padding: var(--space-2);
    font-size: 15px;
    font-family: inherit;
    resize: vertical;
}
.io-tradein-decline-btn {
    background: transparent;
    border: 0;
    color: var(--red);
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
    padding: var(--space-2) 0;
}

/* Accept error */
.io-tradein-accept-error {
    text-align: center;
    padding: var(--space-8) 20px;
    color: var(--ink-soft);
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    :root {
        --ink:     #f5f5f7;
        --ink-soft:#a1a1a6;
        --bg:      #0a0a0d;
        --soft:    #1c1c1e;
        --line:    #2c2c2e;
    }
    .io-tradein-opt,
    .io-tradein-grade-card,
    .io-tradein-accept-card,
    .io-tradein-select,
    .io-tradein-email input { background: #1c1c1e; color: var(--ink); }
}

/* Footnote disclaimer — Apple-style fine print below SPA */
.io-tradein-note {
    max-width: 640px;
    margin: 8px auto 56px;
    padding: 0 24px;
    display: flex;
    gap: 8px;
    align-items: flex-start;
    color: #86868b;
    font-size: 12px;
    line-height: 1.5;
    letter-spacing: -0.01em;
}
.io-tradein-note p { margin: 0; }
.io-tradein-note-icon {
    flex-shrink: 0;
    margin-top: 2px;
    opacity: 0.7;
}
@media (prefers-color-scheme: dark) {
    .io-tradein-note { color: #98989d; }
}