@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --auth-font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --auth-bg: #f5f6f8;
    --auth-card-bg: #ffffff;
    --auth-card-border: rgba(15, 23, 42, 0.08);
    --auth-text: #111827;
    --auth-muted: #4b5563;
    --auth-border: #e5e7eb;
    --auth-primary: #111827;
    --auth-primary-strong: #0b1120;
    --auth-success: #16a34a;
    --auth-danger: #dc2626;
    --auth-surface: #ffffff;
    --auth-blur: 16px;
    --auth-radius-lg: 28px;
    --auth-radius-md: 18px;
    --auth-radius-sm: 12px;
    --auth-transition: 220ms cubic-bezier(0.4, 0, 0.2, 1);
    --auth-shadow-soft: 0 22px 45px rgba(15, 23, 42, 0.08);
    --auth-shadow-hard: 0 20px 60px rgba(17, 24, 39, 0.16);
}

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

html,
body {
    height: 100%;
}

body {
    font-family: var(--auth-font-family);
    font-size: 16px;
    line-height: 1.5;
    color: var(--auth-text);
    background: var(--auth-bg);
    min-height: 100vh;
    padding: clamp(32px, 6vw, 72px) clamp(20px, 5vw, 48px);
}

.auth-shell {
    width: min(1100px, 100%);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 28px;
    align-items: center;
}

.auth-back-link {
    align-self: flex-start;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.94rem;
    font-weight: 500;
    color: rgba(15, 23, 42, 0.72);
    text-decoration: none;
    transition: color var(--auth-transition), transform var(--auth-transition);
    margin-bottom: 4px;
}

.auth-back-link:hover {
    color: var(--auth-primary);
    transform: translateX(-2px);
}

.auth-back-link__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 999px;
    background: rgba(17, 24, 39, 0.08);
    color: var(--auth-primary);
    font-size: 0.85rem;
    transition: background var(--auth-transition), transform var(--auth-transition);
}

.auth-back-link:hover .auth-back-link__icon {
    background: rgba(17, 24, 39, 0.14);
    transform: translateX(-3px);
}

.auth-card {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-radius: var(--auth-radius-lg);
    background: var(--auth-card-bg);
    border: 1px solid var(--auth-card-border);
    box-shadow: var(--auth-shadow-soft);
    overflow: hidden;
    position: relative;
    margin: 0 auto;
    width: 100%;
}

.auth-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    background: linear-gradient(140deg, rgba(79, 70, 229, 0.14), rgba(79, 70, 229, 0) 40%), linear-gradient(320deg, rgba(30, 64, 175, 0.12), rgba(30, 64, 175, 0) 42%);
    opacity: 0.5;
    z-index: -1;
}

.auth-card__aside {
    position: relative;
    padding: clamp(40px, 4vw, 56px);
    background: #171f2a;
    color: #f8fafc;
    display: flex;
}

.auth-card__aside::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(23, 31, 42, 0.02));
    mix-blend-mode: soft-light;
}

.auth-aside {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.auth-aside__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    font-size: 0.8rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    font-weight: 600;
}

.auth-aside__title {
    font-size: clamp(2rem, 2.6vw, 2.4rem);
    font-weight: 700;
    line-height: 1.18;
}

.auth-aside__subtitle {
    font-size: 1rem;
    max-width: 420px;
    color: rgba(241, 245, 249, 0.86);
}

.auth-feature-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.auth-feature {
    display: grid;
    grid-template-columns: 44px 1fr;
    gap: 16px;
    align-items: center;
    padding: 16px 18px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--auth-radius-sm);
    border: 1px solid rgba(248, 250, 252, 0.12);
    transition: transform var(--auth-transition), border-color var(--auth-transition);
}

.auth-feature:hover {
    transform: translateY(-3px);
    border-color: rgba(248, 250, 252, 0.34);
}

.auth-feature__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(248, 250, 252, 0.12);
    color: #f8fafc;
}

.auth-feature__copy h3 {
    font-size: 1rem;
    font-weight: 600;
}

.auth-feature__copy p {
    font-size: 0.88rem;
    margin-top: 4px;
    color: rgba(226, 232, 240, 0.78);
}

.auth-stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-top: auto;
}

.auth-stats__item {
    padding: 18px 20px;
    border-radius: var(--auth-radius-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(248, 250, 252, 0.12);
}

.auth-stats__value {
    display: block;
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.auth-stats__label {
    font-size: 0.82rem;
    color: rgba(226, 232, 240, 0.78);
    margin-top: 6px;
}

.auth-card__content {
    padding: clamp(40px, 4vw, 56px);
    display: flex;
    flex-direction: column;
    gap: 32px;
    background: var(--auth-surface);
}

.auth-card__content--center {
    max-width: 520px;
    width: 100%;
    margin: 0 auto;
}

.auth-card__content--padded {
    padding: clamp(36px, 4vw, 52px);
}

.auth-card-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 14px;
}

.auth-card-header__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    background: rgba(17, 24, 39, 0.06);
    color: rgba(17, 24, 39, 0.7);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.auth-card-header__badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--auth-primary);
    box-shadow: 0 0 0 3px rgba(17, 24, 39, 0.08);
}

.auth-card-header__title {
    font-size: clamp(1.6rem, 2.4vw, 1.9rem);
    font-weight: 700;
    color: var(--auth-text);
    letter-spacing: -0.02em;
}

.auth-card-header__subtitle {
    font-size: 0.98rem;
    color: var(--auth-muted);
    line-height: 1.65;
    max-width: 420px;
}

.auth-card-header__subtitle a {
    font-weight: 600;
}

.auth-card-header--with-icon {
    gap: 16px;
}

.auth-card-header__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 18px;
    background: rgba(17, 24, 39, 0.08);
    color: var(--auth-primary);
    border: 1px solid rgba(17, 24, 39, 0.12);
    box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.4);
}

.auth-card-header__icon svg {
    width: 28px;
    height: 28px;
}

.auth-header {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.auth-header--centered {
    align-items: center;
    text-align: center;
}

.auth-header--centered .auth-header__lead {
    text-align: center;
}

.auth-header__lead {
    font-size: 0.95rem;
    color: var(--auth-muted);
}

.auth-brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.auth-brand--compact {
    align-items: flex-start;
}

.auth-brand--centered {
    justify-content: center;
    text-align: center;
}

.auth-brand--centered .auth-brand__copy {
    text-align: center;
}

.auth-logo {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: rgba(17, 24, 39, 0.08);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--auth-primary);
    font-weight: 700;
    font-size: 1.3rem;
    border: 1px solid rgba(17, 24, 39, 0.12);
}

.auth-brand__title {
    font-size: 1.4rem;
    font-weight: 700;
}

.auth-brand__subtitle {
    font-size: 0.92rem;
    color: var(--auth-muted);
}

.auth-alert {
    border-radius: var(--auth-radius-sm);
    border: 1px solid rgba(17, 24, 39, 0.08);
    padding: 14px 18px;
    font-size: 0.92rem;
    line-height: 1.5;
    color: var(--auth-muted);
    background: rgba(17, 24, 39, 0.04);
    display: flex;
    align-items: flex-start;
    gap: 12px;
    transition: opacity var(--auth-transition);
}

.auth-alert::before {
    content: '';
    width: 6px;
    border-radius: 8px;
    background: linear-gradient(180deg, rgba(17, 24, 39, 0.9), rgba(17, 24, 39, 0.3));
    display: inline-block;
}

.auth-alert[hidden] {
    display: none !important;
}

.auth-alert.is-error {
    border-color: rgba(239, 68, 68, 0.36);
    background: rgba(239, 68, 68, 0.08);
    color: #b91c1c;
}

.auth-alert.is-error::before {
    background: linear-gradient(180deg, rgba(239, 68, 68, 0.85), rgba(239, 68, 68, 0.45));
}

.auth-alert.is-success {
    border-color: rgba(16, 185, 129, 0.36);
    background: rgba(16, 185, 129, 0.08);
    color: #047857;
}

.auth-alert.is-success::before {
    background: linear-gradient(180deg, rgba(16, 185, 129, 0.85), rgba(16, 185, 129, 0.45));
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.auth-form--code {
    gap: 24px;
}

.auth-form__group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.auth-form__group > label {
    font-weight: 600;
    font-size: 0.9rem;
    color: #1e293b;
}

.auth-form__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.auth-input {
    position: relative;
    display: flex;
    align-items: center;
    border-radius: var(--auth-radius-sm);
    border: 1px solid var(--auth-border);
    background: #ffffff;
    transition: border-color var(--auth-transition), box-shadow var(--auth-transition), background var(--auth-transition);
}

.auth-input:focus-within {
    border-color: rgba(17, 24, 39, 0.65);
    box-shadow: 0 0 0 3px rgba(17, 24, 39, 0.12);
}

.auth-input input {
    width: 100%;
    border: none;
    background: transparent;
    padding: 14px 16px;
    font-size: 0.96rem;
    color: var(--auth-text);
    font-family: inherit;
}

.auth-input input::placeholder {
    color: rgba(100, 116, 139, 0.75);
}

.auth-input input:focus {
    outline: none;
}

.auth-input__hint {
    display: block;
    font-size: 0.8rem;
    color: var(--auth-muted);
    padding: 6px 2px 0;
    min-height: 18px;
}

.auth-input--password {
    padding-right: 46px;
}

.auth-input__toggle {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    border: none;
    background: rgba(17, 24, 39, 0.08);
    color: var(--auth-primary);
    font-size: 0.74rem;
    padding: 6px 12px;
    border-radius: 999px;
    cursor: pointer;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: background var(--auth-transition), color var(--auth-transition), box-shadow var(--auth-transition);
}

.auth-input__toggle:hover {
    background: rgba(17, 24, 39, 0.14);
    box-shadow: 0 4px 12px rgba(17, 24, 39, 0.18);
}

.auth-input__toggle.is-active {
    background: rgba(17, 24, 39, 0.18);
    color: var(--auth-primary-strong);
}

.auth-checkbox {
    display: inline-flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.88rem;
    color: var(--auth-muted);
    cursor: pointer;
}

.auth-checkbox input {
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 4px;
    border: 1.5px solid rgba(148, 163, 184, 0.9);
    margin-top: 2px;
    display: grid;
    place-content: center;
    transition: border-color var(--auth-transition), background var(--auth-transition), box-shadow var(--auth-transition);
}

.auth-checkbox input::before {
    content: '';
    width: 10px;
    height: 10px;
    clip-path: polygon(14% 44%, 0% 65%, 50% 100%, 100% 12%, 80% 0%, 43% 62%);
    transform: scale(0);
    transition: transform var(--auth-transition);
    background: white;
}

.auth-checkbox input:checked {
    border-color: var(--auth-primary);
    background: var(--auth-primary);
    box-shadow: 0 6px 12px rgba(17, 24, 39, 0.18);
}

.auth-checkbox input:checked::before {
    transform: scale(1);
}

.auth-checkbox span {
    line-height: 1.4;
}

.auth-link {
    color: var(--auth-primary);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--auth-transition);
}

.auth-link:hover {
    color: rgba(17, 24, 39, 0.8);
}

.auth-link--button {
    border: none;
    background: none;
    padding: 0;
    font: inherit;
    color: var(--auth-primary);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: color var(--auth-transition);
}

.auth-link--button:hover {
    color: var(--auth-primary-strong);
}

.auth-link--muted {
    color: rgba(17, 24, 39, 0.55);
}

.auth-link--muted:hover {
    color: var(--auth-primary);
}

.auth-button {
    appearance: none;
    border: none;
    border-radius: var(--auth-radius-sm);
    background: linear-gradient(135deg, var(--auth-primary) 0%, var(--auth-primary-strong) 100%);
    color: white;
    font-weight: 600;
    font-size: 1rem;
    padding: 15px 20px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    position: relative;
    overflow: hidden;
    transition: transform var(--auth-transition), box-shadow var(--auth-transition), filter var(--auth-transition);
}

.auth-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--auth-shadow-hard);
    filter: brightness(1.02);
}

.auth-button:focus-visible {
    outline: 3px solid rgba(17, 24, 39, 0.2);
    outline-offset: 3px;
}

.auth-button:disabled {
    cursor: not-allowed;
    opacity: 0.72;
    transform: none;
    box-shadow: none;
}

.auth-button__progress {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.32);
    border-top-color: white;
    animation: auth-spin 1s linear infinite;
    display: none;
}

.auth-button.is-loading {
    filter: saturate(0.9);
    pointer-events: none;
}

.auth-button.is-loading .auth-button__progress {
    display: inline-flex;
}

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

.auth-footer--stacked {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
}

.auth-card--narrow {
    max-width: 520px;
    margin-inline: auto;
    grid-template-columns: minmax(0, 1fr);
}

.auth-card--narrow .auth-card__content,
.auth-card--narrow .auth-card__aside {
    padding: clamp(32px, 3.6vw, 44px);
}

.auth-card--narrow .auth-card__aside {
    display: none;
}

.auth-card--split .auth-card__aside {
    display: flex;
}

.auth-card--split .auth-card__content {
    min-height: 560px;
}

.auth-input.is-invalid,
.auth-input[data-invalid="true"] {
    border-color: rgba(220, 38, 38, 0.55);
    background: #fff5f5;
}

.auth-input.is-invalid:focus-within {
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.12);
}

.auth-input__hint.is-error {
    color: #dc2626;
}

.auth-input__hint.is-success {
    color: #047857;
}

.auth-form__two-col {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.auth-code-grid {
    display: grid;
    grid-template-columns: repeat(4, 64px);
    justify-content: center;
    gap: 16px;
}

.auth-form--code .auth-code-grid input {
    width: 64px;
    height: 64px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    border-radius: var(--auth-radius-sm);
    border: 1px solid var(--auth-border);
    background: #ffffff;
    transition: border-color var(--auth-transition), box-shadow var(--auth-transition);
}

.auth-form--code .auth-code-grid input:focus {
    outline: none;
    border-color: rgba(17, 24, 39, 0.6);
    box-shadow: 0 0 0 3px rgba(17, 24, 39, 0.1);
}

.auth-form--code .auth-code-grid input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.auth-quote {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid rgba(148, 163, 184, 0.3);
    color: rgba(255, 255, 255, 0.86);
    font-size: 0.94rem;
}

.auth-quote blockquote {
    font-weight: 500;
    line-height: 1.6;
}

.auth-quote cite {
    display: block;
    margin-top: 12px;
    font-size: 0.82rem;
    color: rgba(226, 232, 240, 0.72);
    font-style: normal;
}

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

@media (max-width: 1100px) {
    .auth-card {
        grid-template-columns: 1fr;
    }

    .auth-card__aside {
        display: none;
    }

    .auth-card__content {
        padding: clamp(32px, 5vw, 44px);
    }

    .auth-back-link {
        position: static;
        margin-bottom: 18px;
    }
}

@media (max-width: 640px) {
    body {
        padding: 18px;
    }

    .auth-code-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 12px;
    }

    .auth-form--code .auth-code-grid input {
        width: 100%;
        height: 56px;
        font-size: 1.3rem;
    }

    .auth-card {
        border-radius: 22px;
    }

    .auth-form__two-col {
        grid-template-columns: 1fr;
    }

    .auth-form__row {
        justify-content: stretch;
    }

    .auth-form__row .auth-link {
        margin-left: auto;
    }

    .auth-button {
        width: 100%;
    }
}