@import url('https://api.fontshare.com/v2/css?f[]=sentient@400,500,400i,500i&f[]=switzer@400,500,600,700&display=swap');

:root {
    --bg-base: oklch(8% 0.02 280);
    --bg-elev-1: oklch(12% 0.035 285);
    --bg-elev-2: oklch(16% 0.045 290);
    --text-primary: oklch(98% 0.005 280);
    --text-secondary: oklch(78% 0.02 285);
    --text-muted: oklch(58% 0.025 285);
    --accent: oklch(68% 0.22 295);
    --accent-soft: oklch(74% 0.16 295);
    --border: oklch(28% 0.04 285);
    --border-soft: oklch(22% 0.03 285);
    --error: oklch(65% 0.2 25);
    --success: oklch(74% 0.18 145);

    --font-serif: 'Sentient', Georgia, serif;
    --font-sans: 'Switzer', system-ui, -apple-system, sans-serif;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-pill: 999px;
}

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

body {
    font-family: var(--font-sans);
    background:
        radial-gradient(ellipse 70% 60% at 0% 0%, oklch(20% 0.08 295 / 0.45), transparent 60%),
        radial-gradient(ellipse 60% 50% at 100% 100%, oklch(18% 0.06 290 / 0.4), transparent 65%),
        var(--bg-base);
    color: var(--text-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    line-height: 1.55;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

.sa-auth {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
}

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

.sa-auth__brand {
    padding: clamp(2rem, 5vw, 4rem);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border-right: 1px solid var(--border-soft);
    position: relative;
    overflow: hidden;
}

.sa-auth__brand::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 40%, oklch(30% 0.18 295 / 0.18), transparent 60%);
    pointer-events: none;
}

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

.sa-logo {
    display: inline-flex;
    align-items: center;
    color: var(--text-primary);
    position: relative;
}

.sa-logo__img {
    height: 36px;
    width: auto;
    display: block;
    mix-blend-mode: screen;
}

.sa-auth__pitch {
    position: relative;
    max-width: 32rem;
}

.sa-auth__eyebrow {
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent-soft);
    margin-bottom: 1.5rem;
}

.sa-auth__headline {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3.25rem);
    font-weight: 400;
    line-height: 1.05;
    letter-spacing: -0.02em;
    margin-bottom: 1.25rem;
}

.sa-auth__headline em {
    font-style: italic;
    color: var(--accent-soft);
}

.sa-auth__copy {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 2.5rem;
}

.sa-auth__feats {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.sa-auth__feats li {
    display: flex;
    gap: 0.7rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.sa-auth__feats li::before {
    content: '✓';
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: oklch(28% 0.1 145 / 0.4);
    color: var(--success);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
}

.sa-auth__legal {
    color: var(--text-muted);
    font-size: 0.85rem;
    position: relative;
}

.sa-auth__legal a:hover { color: var(--text-primary); }

.sa-auth__form-wrap {
    padding: clamp(2rem, 5vw, 4rem);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sa-form {
    width: 100%;
    max-width: 24rem;
}

.sa-form__back {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--text-muted);
    font-size: 0.88rem;
    margin-bottom: 2rem;
    transition: color 0.2s ease;
}

.sa-form__back:hover { color: var(--text-primary); }

.sa-form__title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 400;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.sa-form__sub {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

.sa-plan-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.85rem;
    border-radius: var(--radius-pill);
    background: oklch(20% 0.08 295 / 0.5);
    border: 1px solid var(--border);
    font-size: 0.82rem;
    color: var(--accent-soft);
    margin-bottom: 1.5rem;
}

.sa-plan-pill__dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent);
}

.sa-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: var(--bg-elev-1);
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    padding: 0.3rem;
    margin-bottom: 2rem;
}

.sa-tab {
    padding: 0.6rem 1rem;
    border-radius: var(--radius-pill);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: background 0.2s ease, color 0.2s ease;
}

.sa-tab[aria-selected="true"] {
    background: var(--accent);
    color: oklch(15% 0.02 280);
}

.sa-field {
    margin-bottom: 1.1rem;
}

.sa-field__label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.sa-field__input,
.sa-field__row input {
    width: 100%;
    padding: 0.85rem 1rem;
    background: var(--bg-elev-1);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.sa-field__input:focus,
.sa-field__row input:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--bg-elev-2);
}

.sa-field__input::placeholder { color: var(--text-muted); }

.sa-field__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.sa-field__hint {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.5rem;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.sa-field__hint a { color: var(--accent-soft); }
.sa-field__hint a:hover { color: var(--text-primary); }

.sa-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    margin-bottom: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    cursor: pointer;
}

.sa-checkbox input {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
    margin-top: 2px;
    flex-shrink: 0;
}

.sa-checkbox a { color: var(--accent-soft); }

.sa-submit {
    display: block;
    width: 100%;
    padding: 0.95rem 1rem;
    background: var(--accent);
    color: oklch(15% 0.02 280);
    border-radius: var(--radius-md);
    font-size: 0.98rem;
    font-weight: 600;
    transition: background 0.2s ease, transform 0.2s ease;
    margin-bottom: 1.5rem;
}

.sa-submit:hover { background: var(--accent-soft); transform: translateY(-1px); }

.sa-divider {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    margin: 1.5rem 0;
}

.sa-divider::before,
.sa-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-soft);
}

.sa-oauth {
    display: grid;
    gap: 0.6rem;
    margin-bottom: 1.5rem;
}

.sa-oauth__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.8rem 1rem;
    background: var(--bg-elev-1);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: background 0.2s ease, border-color 0.2s ease;
}

.sa-oauth__btn:hover { background: var(--bg-elev-2); border-color: var(--accent-soft); }

.sa-oauth__icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.sa-form__alt {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.sa-form__alt a { color: var(--accent-soft); font-weight: 500; }
.sa-form__alt a:hover { color: var(--text-primary); }

[data-mode="signin"] [data-only="signup"],
[data-mode="signup"] [data-only="signin"] { display: none; }