:root {
    color-scheme: dark;
    --bg: #020617;
    --bg-accent: rgba(56, 189, 248, 0.15);
    --surface: rgba(15, 23, 42, 0.9);
    --surface-soft: rgba(15, 23, 42, 0.75);
    --border: rgba(148, 163, 184, 0.35);
    --text: #e5e7eb;
    --muted: #9ca3af;
    --accent: #38bdf8;
    --accent-strong: #0ea5e9;
    --error: #f97373;
    --shadow-lg: 0 30px 80px rgba(15, 23, 42, 0.85);
    --focus: #7dd3fc;
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

body {
    margin: 0;
    min-height: 100vh;
    color: var(--text);
    background:
        radial-gradient(circle at top, rgba(56, 189, 248, 0.18), transparent 55%),
        radial-gradient(circle at bottom, rgba(129, 140, 248, 0.15), transparent 60%),
        var(--bg);
}

:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
}

button:focus-visible,
.button:focus-visible,
input:focus-visible,
a:focus-visible,
select:focus-visible {
    box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.7);
}

/* Login layout */
body.login-body {
    display: flex;
    align-items: stretch;
    justify-content: center;
}

.login-shell {
    flex: 1;
    display: grid;
    place-items: center;
    padding: clamp(1.5rem, 4vw, 2.25rem);
}

.login-card {
    width: 100%;
    max-width: 440px;
    background: linear-gradient(145deg, var(--surface), var(--surface-soft));
    border-radius: 26px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    padding: clamp(1.8rem, 3vw, 2.4rem);
    display: grid;
    gap: 1.5rem;
    backdrop-filter: blur(24px);
}

.login-header {
    display: grid;
    gap: 0.5rem;
}

.login-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.25rem;
}

.login-logo-mark {
    width: 32px;
    height: 32px;
    border-radius: 12px;
    background: radial-gradient(circle at 30% 20%, #bae6fd, transparent 55%),
    radial-gradient(circle at 70% 70%, #38bdf8, transparent 60%),
    #0f172a;
    border: 1px solid rgba(148, 163, 184, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    font-weight: 700;
    color: #e0f2fe;
}

.login-logo-text {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.login-logo-text strong {
    font-size: 0.95rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
}

.login-logo-text span {
    font-size: 0.9rem;
    color: rgba(148, 163, 184, 0.85);
}

.login-header h1 {
    margin: 0;
    font-size: 1.6rem;
    letter-spacing: -0.03em;
}

.login-header p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--muted);
}

.login-header p strong {
    color: #e5e7eb;
    font-weight: 600;
}

form {
    display: grid;
    gap: 1rem;
}

label {
    display: grid;
    gap: 0.35rem;
    font-size: 0.9rem;
    font-weight: 500;
}

label span {
    color: rgba(209, 213, 219, 0.95);
}

input[type="email"],
input[type="password"],
input[type="text"],
input[type="number"] {
    padding: 0.7rem 0.85rem;
    border-radius: 12px;
    border: 1px solid rgba(148, 163, 184, 0.4);
    background: rgba(15, 23, 42, 0.85);
    color: var(--text);
    font: inherit;
    outline: none;
    transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
    min-height: 44px;
}

input::placeholder {
    color: rgba(148, 163, 184, 0.75);
}

input:focus {
    border-color: var(--accent);
    background: rgba(15, 23, 42, 0.95);
}

.field-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
}

.field-extra {
    font-size: 0.85rem;
}

.field-extra a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

.field-extra a:hover,
.field-extra a:focus {
    color: var(--accent-strong);
    text-decoration: underline;
}

.button,
button {
    font: inherit;
    border-radius: 999px;
    padding: 0.65rem 1.2rem;
    border: 1px solid transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: background 0.18s ease, transform 0.12s ease, box-shadow 0.18s ease, border-color 0.18s ease;
    white-space: nowrap;
    min-height: 44px;
    min-width: 44px;
}

.button-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #0f172a;
    font-weight: 600;
    box-shadow: 0 16px 32px rgba(56, 189, 248, 0.45);
    width: 100%;
}

.button-primary:hover,
.button-primary:focus {
    background: linear-gradient(135deg, var(--accent-strong), #22d3ee);
    transform: translateY(-1px);
}

.button-outline {
    width: 100%;
    background: rgba(15, 23, 42, 0.85);
    border-color: rgba(148, 163, 184, 0.5);
    color: var(--text);
    font-weight: 500;
}

.button-outline:hover,
.button-outline:focus {
    border-color: var(--accent);
    background: rgba(15, 23, 42, 0.9);
    box-shadow: 0 16px 36px rgba(15, 23, 42, 0.8);
}

.button[aria-busy="true"] {
    opacity: 0.8;
    cursor: wait;
}

.button[aria-busy="true"]::after {
    content: '';
    width: 16px;
    height: 16px;
    border-radius: 999px;
    border: 2px solid rgba(15, 23, 42, 0.6);
    border-top-color: rgba(15, 23, 42, 1);
    animation: spin 0.8s linear infinite;
}

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

.button-icon {
    font-size: 1.05rem;
}

.login-divider {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.8rem;
    color: var(--muted);
}

.login-divider::before,
.login-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(
        to right,
        transparent,
        rgba(148, 163, 184, 0.4),
        transparent
    );
}

.signup-section {
    border-top: 1px solid rgba(148, 163, 184, 0.4);
    padding-top: 1.25rem;
    display: grid;
    gap: 0.75rem;
}

.signup-section h2 {
    margin: 0;
    font-size: 1.1rem;
    color: #e5e7eb;
}

.signup-grid {
    display: grid;
    gap: 0.65rem;
}

.signup-row {
    display: grid;
    gap: 0.35rem;
}

.option-group {
    border: 1px solid rgba(148, 163, 184, 0.35);
    border-radius: 14px;
    padding: 0.75rem;
    display: grid;
    gap: 0.35rem;
}

.option-group legend {
    font-weight: 600;
    color: var(--text);
}

.option-group label {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

#assurance-tier-options {
    border: 1px dashed rgba(148, 163, 184, 0.45);
    border-radius: 12px;
    padding: 0.6rem 0.75rem;
    color: var(--muted);
    font-size: 0.9rem;
}

.signup-steps {
    display: grid;
    gap: 0.8rem;
    margin-bottom: 0.8rem;
    padding: 0.9rem 1rem;
    border-radius: 14px;
    border: 1px solid rgba(148, 163, 184, 0.25);
    background: rgba(30, 41, 59, 0.75);
}

.signup-steps__title {
    font-size: 0.95rem;
    font-weight: 600;
    color: rgba(226, 232, 240, 0.92);
}

.signup-steps ol {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 0.4rem;
}

.signup-steps li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.88rem;
    color: var(--muted);
}

.signup-steps li::before {
    content: '\25CF';
    font-size: 0.75rem;
    color: rgba(148, 163, 184, 0.7);
}

.signup-steps li[data-status="active"] {
    color: #e2e8f0;
}

.signup-steps li[data-status="active"]::before {
    color: var(--accent);
}

.signup-steps li[data-status="done"]::before {
    content: '✓';
    color: #4ade80;
}

.signup-feedback {
    display: grid;
    gap: 0.5rem;
    margin: 0.5rem 0 0.75rem;
    color: var(--muted);
    font-size: 0.92rem;
}

.signup-feedback strong {
    color: #e2e8f0;
}

.inline-error {
    border: 1px solid rgba(249, 115, 115, 0.45);
    background: rgba(239, 68, 68, 0.1);
    color: #fecdd3;
    padding: 0.6rem 0.75rem;
    border-radius: 12px;
    font-size: 0.9rem;
}

.signup-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.signup-actions small {
    color: var(--muted);
}

.otp-helper {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: var(--muted);
}

.trial-summary {
    margin-top: 0.75rem;
    padding: 0.9rem 1rem;
    border-radius: 12px;
    border: 1px solid rgba(148, 163, 184, 0.25);
    background: rgba(15, 23, 42, 0.6);
    color: var(--muted);
    font-size: 0.9rem;
}

.trial-summary strong {
    color: #e2e8f0;
}

#lifecycle-nudges {
    border-radius: 12px;
    background: rgba(56, 189, 248, 0.08);
    border: 1px solid rgba(56, 189, 248, 0.35);
    padding: 0.65rem 0.75rem;
    color: #bae6fd;
    font-size: 0.9rem;
}

.login-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.85rem;
    color: var(--muted);
}

.login-footer a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

.login-footer a:hover,
.login-footer a:focus {
    color: var(--accent-strong);
    text-decoration: underline;
}

.message-bar {
    border-radius: 14px;
    padding: 0.6rem 0.8rem;
    font-size: 0.85rem;
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid rgba(148, 163, 184, 0.55);
    color: var(--muted);
    display: flex;
    gap: 0.5rem;
    align-items: flex-start;
}

.message-bar[data-tone="error"] {
    border-color: rgba(248, 113, 113, 0.9);
    background: rgba(248, 113, 113, 0.1);
    color: var(--error);
}

.message-bar[data-tone="success"] {
    border-color: rgba(45, 212, 191, 0.9);
    background: rgba(45, 212, 191, 0.12);
    color: #a7f3d0;
}

.message-bar-icon {
    font-size: 1rem;
    line-height: 1;
}

.message-bar-text {
    flex: 1;
}

.language-switcher {
    align-self: flex-start;
    font-size: 0.8rem;
    color: var(--muted);
}

.language-switcher select {
    margin-top: 0.25rem;
    width: 100%;
    padding: 0.45rem 0.75rem;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.4);
    background: rgba(15, 23, 42, 0.9);
    color: var(--text);
    font: inherit;
    min-height: 44px;
}

/* Signup layout */
body.auth-body {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(1.5rem, 4vw, 2.5rem);
}

.auth-wrapper {
    width: 100%;
    display: grid;
    place-items: center;
}

.auth-card {
    width: min(880px, 100%);
    background: linear-gradient(145deg, rgba(15, 23, 42, 0.92), rgba(15, 23, 42, 0.82));
    border: 1px solid rgba(148, 163, 184, 0.35);
    border-radius: 26px;
    box-shadow: var(--shadow-lg);
    padding: clamp(1.8rem, 3vw, 2.6rem);
    display: grid;
    gap: 1.25rem;
    color: var(--text);
}

.auth-header {
    display: grid;
    gap: 0.4rem;
}

.auth-logo {
    width: 138px;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(56, 189, 248, 0.2));
}

.auth-header h1 {
    margin: 0;
    font-size: clamp(1.6rem, 3vw, 2rem);
    letter-spacing: -0.02em;
}

.auth-subtitle {
    margin: 0;
    color: var(--muted);
    font-size: 1rem;
}

.auth-form {
    display: grid;
    gap: 1rem;
}

.auth-two-cols {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
}

.auth-form-row {
    display: grid;
    gap: 0.35rem;
}

.auth-form-row label {
    font-size: 0.95rem;
    color: rgba(226, 232, 240, 0.95);
}

.auth-form-row input[type="text"],
.auth-form-row input[type="email"],
.auth-form-row input[type="password"] {
    width: 100%;
}

.auth-inline {
    align-items: center;
}

.auth-checkbox {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.6rem;
    align-items: start;
    font-size: 0.95rem;
    color: var(--muted);
}

.auth-checkbox input {
    margin-top: 0.15rem;
    min-width: 20px;
    min-height: 20px;
    accent-color: var(--accent);
}

.auth-error {
    border-radius: 12px;
    border: 1px solid rgba(249, 115, 115, 0.5);
    background: rgba(239, 68, 68, 0.12);
    color: #fecdd3;
    padding: 0.7rem 0.85rem;
    font-size: 0.95rem;
}

.auth-primary-btn {
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    border: 1px solid rgba(56, 189, 248, 0.65);
    color: #0f172a;
    font-weight: 700;
    border-radius: 14px;
    padding: 0.85rem 1rem;
    width: 100%;
    cursor: pointer;
    display: inline-flex;
    gap: 0.6rem;
    align-items: center;
    justify-content: center;
    transition: transform 0.12s ease, box-shadow 0.18s ease, background 0.18s ease;
    min-height: 48px;
}

.auth-primary-btn:hover,
.auth-primary-btn:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 16px 36px rgba(56, 189, 248, 0.45);
}

.auth-primary-btn:active {
    transform: translateY(0);
}

.auth-primary-btn:disabled {
    opacity: 0.8;
    cursor: not-allowed;
}

.auth-footer {
    display: flex;
    gap: 0.35rem;
    align-items: center;
    color: var(--muted);
}

.auth-footer a {
    color: var(--accent);
    font-weight: 600;
    text-decoration: none;
}

.auth-footer a:hover,
.auth-footer a:focus-visible {
    color: var(--accent-strong);
    text-decoration: underline;
}

@media (max-width: 680px) {
    body.login-body {
        padding: 1.2rem;
    }

    .field-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .login-card {
        padding: 1.6rem;
    }
}