.ctf-auth-shell {
    min-height: 100vh;
    margin: 0;
    background:
        radial-gradient(circle at top left, rgba(22, 140, 130, 0.18), transparent 24rem),
        radial-gradient(circle at bottom right, rgba(241, 143, 1, 0.14), transparent 18rem),
        linear-gradient(180deg, var(--ctf-bg-0) 0%, var(--ctf-bg-1) 100%);
    color: var(--ctf-ink);
}

.ctf-auth-stage {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.ctf-auth-frame {
    width: min(1160px, 100%);
    display: grid;
    grid-template-columns: minmax(320px, 1.05fr) minmax(340px, 0.95fr);
    gap: 1.5rem;
    align-items: stretch;
}

.ctf-auth-brand-panel,
.ctf-auth-card {
    border-radius: 28px;
    box-shadow: 0 24px 54px rgba(35, 50, 58, 0.14);
}

.ctf-auth-brand-panel {
    position: relative;
    overflow: hidden;
    padding: 2.35rem;
    background:
        linear-gradient(160deg, rgba(247, 251, 255, 0.98), rgba(232, 242, 247, 0.96));
    border: 1px solid rgba(157, 184, 200, 0.68);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 1rem;
}

.ctf-auth-brand-panel::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at top left, rgba(22, 140, 130, 0.16), transparent 16rem),
        radial-gradient(circle at bottom right, rgba(241, 143, 1, 0.14), transparent 14rem);
    pointer-events: none;
}

.ctf-auth-brand-panel > * {
    position: relative;
    z-index: 1;
}

.ctf-auth-brand-lockup {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
}

.ctf-auth-logo-round {
    width: 112px;
    height: 112px;
    flex: 0 0 auto;
    border-radius: 999px;
    padding: 0.12rem;
    background: rgba(255, 255, 255, 0.98);
    filter: drop-shadow(0 10px 22px rgba(11, 111, 117, 0.16));
}

.ctf-auth-logo-rect {
    width: min(280px, 100%);
    height: auto;
    padding: 0.75rem 0.95rem;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(201, 217, 226, 0.95);
}

.ctf-auth-kicker {
    margin: 0;
    color: var(--ctf-green-deep);
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.78rem;
    font-weight: 800;
}

.ctf-auth-brand-panel h1 {
    margin: 0;
    font-size: clamp(2rem, 3vw, 2.9rem);
    line-height: 1.03;
    color: var(--ctf-ink);
}

.ctf-auth-copy {
    margin: 0;
    max-width: 34rem;
    font-size: 1rem;
    line-height: 1.68;
    color: var(--ctf-ink-soft);
}

.ctf-auth-footnote {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: auto;
    padding-top: 1rem;
    width: 100%;
    text-align: center;
    font-size: 0.92rem;
}

.ctf-auth-powered {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 2.25rem;
    padding: 0.4rem 0.8rem;
    border-radius: 999px;
    background: rgba(35, 50, 58, 0.08);
    border: 1px solid rgba(35, 50, 58, 0.12);
    color: var(--ctf-ink-soft);
    font-weight: 700;
}

.ctf-auth-powered-emphasis {
    color: var(--ctf-red);
}

.ctf-auth-card {
    padding: 2.1rem;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid rgba(157, 184, 200, 0.7);
    display: flex;
    align-items: center;
}

.ctf-auth-content {
    width: 100%;
}

.ctf-auth-page-kicker {
    margin: 0 0 0.7rem;
    color: var(--ctf-red);
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-size: 0.76rem;
    font-weight: 800;
}

.ctf-auth-content h2 {
    margin: 0;
    font-size: 1.8rem;
    color: var(--ctf-ink);
}

.ctf-auth-page-copy {
    margin: 0.8rem 0 1.15rem;
    color: var(--ctf-ink-soft);
    line-height: 1.58;
    font-size: 0.95rem;
}

.ctf-auth-form {
    display: grid;
    gap: 0.85rem;
}

.ctf-auth-field {
    display: grid;
    gap: 0.35rem;
}

.ctf-auth-field label {
    font-weight: 700;
    color: var(--ctf-ink);
    font-size: 0.92rem;
}

.ctf-auth-field input,
.ctf-auth-field select,
.ctf-auth-project-display {
    min-height: 2.65rem;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    border-radius: 12px;
    border: 1px solid rgba(157, 184, 200, 0.9);
    padding: 0.55rem 0.85rem;
    font-size: 0.96rem;
    background: #ffffff;
    color: var(--ctf-ink);
}

.ctf-auth-field input:focus,
.ctf-auth-field select:focus,
.ctf-auth-project-display:focus {
    outline: 2px solid rgba(22, 140, 130, 0.18);
    border-color: var(--ctf-green);
    box-shadow: none;
}

.ctf-auth-select {
    appearance: auto;
}

.ctf-auth-validation,
.ctf-auth-field-error {
    color: #a12b2b;
    font-weight: 600;
}

.ctf-auth-check {
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.ctf-auth-check label {
    color: var(--ctf-ink-soft);
    font-size: 0.9rem;
}

.ctf-auth-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
    margin-top: 0.4rem;
    width: 100%;
    align-items: stretch;
}

.ctf-auth-actions > * {
    min-width: 0;
    box-sizing: border-box;
}

.ctf-auth-submit,
.ctf-auth-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.65rem;
    padding: 0.45rem 0.95rem;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 700;
    border: 1px solid transparent;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    font-size: 0.95rem;
}

.ctf-auth-submit {
    background: linear-gradient(135deg, var(--ctf-green) 0%, var(--ctf-green-deep) 100%);
    color: #ffffff;
    border-color: var(--ctf-green-deep);
}

.ctf-auth-submit:hover {
    color: #ffffff;
    background: linear-gradient(135deg, var(--ctf-green-deep) 0%, #064f55 100%);
}

.ctf-auth-secondary {
    background: transparent;
    color: var(--ctf-red);
    border-color: rgba(241, 143, 1, 0.28);
}

.ctf-auth-secondary:hover {
    color: var(--ctf-red);
    background: rgba(241, 143, 1, 0.08);
}

.ctf-auth-password-wrap {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: stretch;
}

.ctf-auth-password-wrap .btn {
    border-color: rgba(157, 184, 200, 0.9);
    background: #f7fbff;
    min-width: 2.65rem;
    min-height: 2.65rem;
    padding: 0;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 0.45rem;
}

.ctf-auth-password-wrap .btn svg {
    width: 16px;
    height: 16px;
}

@media (max-width: 980px) {
    .ctf-auth-stage {
        padding: 1rem;
    }

    .ctf-auth-frame {
        grid-template-columns: 1fr;
    }

    .ctf-auth-brand-panel,
    .ctf-auth-card {
        padding: 1.5rem;
    }

    .ctf-auth-actions {
        grid-template-columns: 1fr;
    }
}