:root {
    --rd-ink: #0B0F17;
    --rd-ink-soft: #111827;
    --rd-paper: #F4F6F9;
    --rd-paper-raised: #FFFFFF;
    --rd-green: #2454D9;
    --rd-green-deep: #12327A;
    --rd-gold: #4C7BEF;
    --rd-gold-soft: #DCE6FB;
    --rd-text: #12151B;
    --rd-text-muted: #5B6270;
    --rd-line: #E2E5EA;
    --rd-error: #C4331F;
    --rd-body: 'Inter', -apple-system, sans-serif;
    --rd-mono: 'JetBrains Mono', monospace;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--rd-body);
    color: var(--rd-text);
    background: var(--rd-paper);
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

h1,
h2,
h3 {
    margin: 0;
    font-family: var(--rd-body);
    font-weight: 700;
    color: var(--rd-ink);
    letter-spacing: -.01em;
}

p {
    margin: 0;
}

button {
    font-family: inherit;
    cursor: pointer;
}

input {
    font-family: inherit;
}

.rd-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

@media(max-width:960px) {
    .rd-shell {
        grid-template-columns: 1fr;
    }
}

/* ===== Left brand panel ===== */
.rd-panel {
    background: var(--rd-ink);
    color: var(--rd-paper);
    padding: 56px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}

.rd-panel::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 85% 15%, rgba(76, 123, 239, 0.25), transparent 55%),
        radial-gradient(circle at 10% 90%, rgba(36, 84, 217, 0.2), transparent 50%);
    pointer-events: none;
}

@media(max-width:960px) {
    .rd-panel {
        display: none;
    }
}

.rd-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--rd-paper);
    position: relative;
    z-index: 1;
}

.rd-logo__mark {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    background: linear-gradient(155deg, var(--rd-green) 0%, var(--rd-green-deep) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--rd-paper);
    font-size: .9rem;
    font-weight: 700;
    font-family: var(--rd-mono);
    flex-shrink: 0;
}

.rd-panel__body {
    position: relative;
    z-index: 1;
    max-width: 420px;
}

.rd-panel__body h1 {
    color: var(--rd-paper);
    font-size: clamp(1.9rem, 3vw, 2.5rem);
    line-height: 1.15;
    margin-bottom: 18px;
}

.rd-panel__body p {
    color: rgba(244, 246, 249, 0.7);
    font-size: 1.02rem;
    line-height: 1.6;
    margin-bottom: 32px;
}

.rd-benefits {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.rd-benefit {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: .92rem;
    color: rgba(244, 246, 249, 0.85);
}

.rd-benefit__icon {
    width: 22px;
    height: 22px;
    border-radius: 6px;
    background: rgba(76, 123, 239, 0.25);
    color: var(--rd-gold);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 1px;
}

.rd-panel__quote {
    position: relative;
    z-index: 1;
    border-top: 1px solid rgba(244, 246, 249, 0.15);
    padding-top: 24px;
}

.rd-panel__quote blockquote {
    font-size: .95rem;
    font-style: italic;
    line-height: 1.6;
    color: rgba(244, 246, 249, 0.85);
    margin-bottom: 12px;
}

.rd-panel__quote cite {
    font-style: normal;
    font-size: .82rem;
    color: rgba(244, 246, 249, 0.55);
}

/* ===== Right form panel ===== */
.rd-formside {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 56px 24px;
}

.rd-formcard {
    width: 100%;
    max-width: 440px;
}

.rd-logo--mobile {
    display: none;
    margin-bottom: 32px;
}

@media(max-width:960px) {
    .rd-logo--mobile {
        display: flex;
        color: var(--rd-ink);
    }

    .rd-logo--mobile .rd-logo__mark {
        color: var(--rd-paper);
    }
}

.rd-formcard__head {
    margin-bottom: 32px;
}

.rd-formcard__head h2 {
    font-size: 1.7rem;
    margin-bottom: 8px;
}

.rd-formcard__head p {
    color: var(--rd-text-muted);
    font-size: .95rem;
}

.rd-formcard__head p a {
    color: var(--rd-green);
    font-weight: 600;
}

.rd-formcard__head p a:hover {
    text-decoration: underline;
}

.rd-field {
    margin-bottom: 20px;
}

.rd-field label {
    display: block;
    font-size: .85rem;
    font-weight: 600;
    color: var(--rd-ink);
    margin-bottom: 7px;
}

.rd-field__hint {
    font-size: .78rem;
    color: var(--rd-text-muted);
    margin-top: 6px;
}

.rd-field__error {
    font-size: .78rem;
    color: var(--rd-error);
    margin-top: 6px;
    display: none;
}

.rd-field.has-error .rd-field__error {
    display: block;
}

.rd-field.has-error input {
    border-color: var(--rd-error) !important;
}

.rd-input-wrap {
    position: relative;
}

.rd-input {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--rd-line);
    border-radius: 10px;
    font-size: .95rem;
    color: var(--rd-text);
    background: var(--rd-paper-raised);
    transition: border-color .15s ease, box-shadow .15s ease;
}

.rd-input::placeholder {
    color: #A6ACB8;
}

.rd-input:focus {
    outline: none;
    border-color: var(--rd-green);
    box-shadow: 0 0 0 4px rgba(36, 84, 217, 0.12);
}

.rd-input--mono {
    font-family: var(--rd-mono);
    letter-spacing: .02em;
}

.rd-input-wrap .rd-toggle-pass {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    padding: 8px;
    color: var(--rd-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
}

.rd-input-wrap .rd-toggle-pass:hover {
    color: var(--rd-ink);
}

.rd-input-wrap .rd-input {
    padding-right: 44px;
}

.rd-row2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media(max-width:520px) {
    .rd-row2 {
        grid-template-columns: 1fr;
    }
}

.rd-strength {
    display: flex;
    gap: 5px;
    margin-top: 8px;
}

.rd-strength__bar {
    height: 4px;
    flex: 1;
    border-radius: 100px;
    background: var(--rd-line);
    transition: background .2s ease;
}

.rd-strength__label {
    font-size: .78rem;
    color: var(--rd-text-muted);
    margin-top: 6px;
}

.rd-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: .85rem;
    color: var(--rd-text-muted);
    margin-bottom: 24px;
    line-height: 1.5;
}

.rd-checkbox input {
    margin-top: 3px;
    accent-color: var(--rd-green);
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.rd-checkbox a {
    color: var(--rd-green);
    font-weight: 600;
}

.rd-checkbox a:hover {
    text-decoration: underline;
}

.rd-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 22px;
    border-radius: 10px;
    font-weight: 600;
    font-size: .95rem;
    border: 1px solid transparent;
    transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
    width: 100%;
}

.rd-btn--primary {
    background: var(--rd-ink);
    color: var(--rd-paper);
}

.rd-btn--primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(11, 15, 23, 0.25);
}

.rd-divider {
    display: flex;
    align-items: center;
    gap: 14px;
    margin: 28px 0;
    color: var(--rd-text-muted);
    font-size: .8rem;
}

.rd-divider::before,
.rd-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--rd-line);
}

.rd-oauth {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.rd-oauth-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 14px;
    border: 1.5px solid var(--rd-line);
    border-radius: 10px;
    font-size: .88rem;
    font-weight: 600;
    color: var(--rd-ink);
    background: var(--rd-paper-raised);
    transition: border-color .15s ease, background .15s ease;
}

.rd-oauth-btn:hover {
    border-color: var(--rd-green);
    background: var(--rd-gold-soft);
}