:root {
    color-scheme: light;

    --gradient-page: linear-gradient(180deg, #e9f0ff 0%, #f8faff 42%, #ffffff 100%);

    --color-surface: #ffffff;
    --color-surface-alt: rgba(255, 255, 255, 0.82);
    --color-border: rgba(16, 32, 67, 0.08);
    --color-shadow: 0 32px 65px rgba(15, 23, 42, 0.12);

    --color-text: #101f3f;
    --color-text-muted: rgba(16, 31, 63, 0.64);
    --color-text-subtle: rgba(16, 31, 63, 0.52);

    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-primary-text: #ffffff;

    --color-secondary-start: #3b82f6;
    --color-secondary-end: #6366f1;

    --color-neutral-surface: rgba(255, 255, 255, 0.92);

    --color-input-bg: rgba(255, 255, 255, 0.96);
    --color-input-border: rgba(16, 32, 67, 0.12);
    --color-input-placeholder: rgba(16, 32, 67, 0.46);

    --color-badge-bg: rgba(37, 99, 235, 0.14);
    --color-badge-text: #1d4ed8;

    --color-alert-error-bg: rgba(239, 68, 68, 0.12);
    --color-alert-error-text: #b91c1c;

    --option-primary-bg: linear-gradient(135deg, #1d4ed8, #1e3a8a);
    --option-primary-text: #f8fafc;
    --option-primary-subtext: rgba(248, 250, 252, 0.88);
    --option-primary-shadow: 0 18px 38px rgba(29, 78, 216, 0.35);

    --option-secondary-bg: linear-gradient(135deg, #7c3aed, #6366f1);
    --option-secondary-text: #f8fafc;
    --option-secondary-subtext: rgba(248, 250, 252, 0.9);
    --option-secondary-shadow: 0 20px 40px rgba(94, 59, 231, 0.32);

    --option-neutral-bg: rgba(255, 255, 255, 0.95);
    --option-neutral-text: #0f172a;
    --option-neutral-subtext: rgba(15, 23, 42, 0.62);
    --option-neutral-border: rgba(15, 23, 42, 0.12);
    --option-neutral-shadow: 0 16px 32px rgba(15, 23, 42, 0.1);

    --radius-card: 24px;
    --radius-pane: 20px;

    --transition-fast: 0.2s ease;
}

[data-theme="dark"] {
    color-scheme: dark;

    --gradient-page: linear-gradient(180deg, #0b1324 0%, #101a33 100%);

    --color-surface: rgba(19, 28, 45, 0.92);
    --color-surface-alt: rgba(26, 38, 59, 0.88);
    --color-border: rgba(148, 163, 184, 0.22);
    --color-shadow: 0 30px 70px rgba(0, 0, 0, 0.45);

    --color-text: #f4f6ff;
    --color-text-muted: rgba(219, 234, 254, 0.82);
    --color-text-subtle: rgba(203, 213, 225, 0.7);

    --color-primary: #38bdf8;
    --color-primary-hover: #0ea5e9;
    --color-primary-text: #0f172a;

    --color-secondary-start: #5b21b6;
    --color-secondary-end: #2563eb;

    --color-neutral-surface: rgba(30, 41, 59, 0.92);

    --color-input-bg: rgba(15, 23, 42, 0.85);
    --color-input-border: rgba(148, 163, 184, 0.4);
    --color-input-placeholder: rgba(203, 213, 225, 0.65);

    --color-badge-bg: rgba(56, 189, 248, 0.22);
    --color-badge-text: #38bdf8;

    --color-alert-error-bg: rgba(248, 113, 113, 0.18);
    --color-alert-error-text: #fca5a5;

    --option-primary-bg: linear-gradient(135deg, #2563eb, #1d4ed8);
    --option-primary-text: #f8fafc;
    --option-primary-subtext: rgba(241, 245, 249, 0.88);
    --option-primary-shadow: 0 22px 44px rgba(29, 78, 216, 0.5);

    --option-secondary-bg: linear-gradient(135deg, #8b5cf6, #6366f1);
    --option-secondary-text: #f8fafc;
    --option-secondary-subtext: rgba(236, 252, 255, 0.85);
    --option-secondary-shadow: 0 22px 44px rgba(99, 102, 241, 0.48);

    --option-neutral-bg: rgba(30, 41, 59, 0.92);
    --option-neutral-text: #e2e8f0;
    --option-neutral-subtext: rgba(226, 232, 240, 0.7);
    --option-neutral-border: rgba(94, 115, 148, 0.4);
    --option-neutral-shadow: 0 18px 36px rgba(8, 15, 33, 0.65);
}

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

.public-body {
    min-height: 100vh;
    margin: 0;
    background: var(--gradient-page);
    color: var(--color-text);
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
    font-weight: 500;
    display: flex;
    justify-content: center;
    padding: clamp(2.5rem, 4vw, 4rem) clamp(1rem, 3vw, 2rem) clamp(3rem, 5vw, 4.5rem);
    transition: background 0.35s ease, color 0.35s ease;
}

.page-shell {
    width: min(960px, 100%);
    display: grid;
    gap: clamp(1.5rem, 3vw, 2.75rem);
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-text-muted);
}

.page-header__actions {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
}

.page-header__brand {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--color-text);
    text-decoration: none;
}

.page-header__brand:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.theme-switch {
    position: relative;
    border: 1px solid var(--color-border);
    background: var(--color-neutral-surface);
    color: var(--color-text);
    border-radius: 999px;
    padding: 0.35rem 0.6rem;
    font-size: 1.05rem;
    cursor: pointer;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast), border var(--transition-fast);
}

.theme-switch[data-theme="dark"] {
    border-color: rgba(148, 163, 184, 0.35);
}

.theme-switch__icon {
    display: none;
}

.theme-switch[data-theme="light"] .theme-switch__icon--moon,
.theme-switch:not([data-theme]) .theme-switch__icon--moon {
    display: block;
}

.theme-switch[data-theme="dark"] .theme-switch__icon--sun {
    display: block;
}

.embed-notice {
    display: none;
    margin: clamp(0.75rem, 2vw, 1.25rem) 0 0;
    padding: 0.9rem 1.05rem;
    border-radius: 16px;
    border: 1px solid rgba(37, 99, 235, 0.18);
    background: rgba(37, 99, 235, 0.08);
    color: var(--color-text);
    align-items: center;
    gap: clamp(0.75rem, 2vw, 1.25rem);
    box-shadow: 0 14px 28px rgba(37, 99, 235, 0.12);
}

.embed-notice--visible {
    display: flex;
    animation: embed-notice-in 220ms ease-out;
}

.embed-notice--dismissed {
    animation: embed-notice-out 180ms ease-in forwards;
}

.embed-notice__icon {
    width: 2.5rem;
    height: 2.5rem;
    display: grid;
    place-items: center;
    border-radius: 12px;
    background: var(--color-primary);
    color: var(--color-primary-text);
    font-size: 1.1rem;
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.25);
}

.embed-notice__content {
    flex: 1 1 auto;
    display: grid;
    gap: 0.25rem;
}

.embed-notice__title {
    margin: 0;
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
}

.embed-notice__message {
    margin: 0;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.embed-notice__actions {
    display: inline-flex;
    gap: 0.6rem;
    align-items: center;
    flex-wrap: wrap;
}

.embed-notice__button {
    appearance: none;
    border: none;
    border-radius: 999px;
    padding: 0.45rem 1.05rem;
    font-weight: 600;
    background: var(--color-primary);
    color: var(--color-primary-text);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.25);
}

.embed-notice__button:hover,
.embed-notice__button:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 16px 30px rgba(37, 99, 235, 0.32);
    outline: none;
}

.embed-notice__link {
    appearance: none;
    border: none;
    background: transparent;
    color: var(--color-primary);
    font-weight: 600;
    cursor: pointer;
    padding: 0.3rem 0.45rem;
    border-radius: 0.75rem;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.embed-notice__link:hover,
.embed-notice__link:focus-visible {
    background: rgba(37, 99, 235, 0.18);
    color: var(--color-primary-hover);
    outline: none;
}

@keyframes embed-notice-in {
    from {
        transform: translateY(-6px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes embed-notice-out {
    to {
        transform: translateY(-6px);
        opacity: 0;
    }
}

.language-picker {
    position: relative;
    display: inline-flex;
}

.language-picker__button {
    align-items: center;
    background: var(--color-neutral-surface);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    color: var(--color-text);
    cursor: pointer;
    display: inline-flex;
    font-size: 0.92rem;
    font-weight: 600;
    gap: 0.45rem;
    padding: 0.35rem 0.9rem;
    transition: border var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}

.language-picker__button:hover,
.language-picker__button:focus-visible {
    border-color: rgba(37, 99, 235, 0.3);
    outline: none;
}

.language-picker__chevron {
    font-size: 0.7rem;
}

.language-picker__menu {
    position: absolute;
    top: calc(100% + 0.4rem);
    right: 0;
    display: grid;
    gap: 0.25rem;
    background: var(--color-surface);
    border-radius: 14px;
    border: 1px solid var(--color-border);
    box-shadow: 0 18px 34px rgba(15, 23, 42, 0.14);
    padding: 0.45rem;
    min-width: 160px;
    z-index: 20;
}

.language-picker__menu[hidden] {
    display: none !important;
}

.language-picker__option {
    background: transparent;
    border: none;
    border-radius: 10px;
    color: var(--color-text);
    cursor: pointer;
    font-size: 0.92rem;
    font-weight: 600;
    padding: 0.45rem 0.6rem;
    text-align: left;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.language-picker__option:hover,
.language-picker__option:focus-visible {
    background: rgba(37, 99, 235, 0.12);
    color: var(--color-primary);
    outline: none;
}

.language-picker__option[aria-current="true"] {
    background: rgba(37, 99, 235, 0.22);
    color: var(--color-primary);
}

.language-picker__menu[hidden] {
    display: none !important;
}

.page-main {
    width: 100%;
}

.card {
    background: var(--color-surface);
    border-radius: var(--radius-card);
    padding: clamp(2.2rem, 5vw, 3rem);
    box-shadow: var(--color-shadow);
    border: 1px solid var(--color-border);
    display: grid;
    gap: clamp(1.4rem, 3vw, 2rem);
}

.card--hero {
    gap: clamp(1.6rem, 3.2vw, 2.3rem);
}

.card--loading {
    min-height: 220px;
    justify-items: center;
    text-align: center;
}

.session-check {
    display: grid;
    gap: 0.75rem;
    justify-items: center;
    align-items: center;
}

.session-check__spinner {
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 999px;
    border: 3px solid rgba(37, 99, 235, 0.25);
    border-top-color: var(--color-primary);
    animation: session-spinner 0.9s linear infinite;
}

.session-check__title {
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0;
    color: var(--color-text);
}

.session-check__message {
    margin: 0;
    font-size: 0.94rem;
    color: var(--color-text-muted);
    max-width: 26rem;
    text-wrap: balance;
}

@keyframes session-spinner {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@media (prefers-reduced-motion: reduce) {
    .session-check__spinner {
        animation: none;
    }
    .embed-notice__button,
    .embed-notice__link {
        transition: none;
    }
    .embed-notice--visible,
    .embed-notice--dismissed {
        animation: none;
    }
}

.card--narrow {
    max-width: 640px;
    margin: 0 auto;
}

.card__header {
    display: grid;
    gap: 0.75rem;
}

.card__title {
    font-size: clamp(1.8rem, 4vw, 2.2rem);
    letter-spacing: -0.015em;
    margin: 0;
}

.card__description {
    margin: 0;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.card__footer {
    font-size: 0.95rem;
    color: var(--color-text-subtle);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--color-badge-bg);
    color: var(--color-badge-text);
    padding: 0.3rem 0.8rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.option-list {
    display: grid;
    gap: 1rem;
    grid-auto-rows: 1fr;
}

@media (min-width: 760px) {
    .option-list {
        grid-template-columns: repeat(3, minmax(240px, 1fr));
        gap: 1.5rem;
    }
}

.option-tile {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    padding: 1.1rem 1.35rem;
    border-radius: 18px;
    border: 1px solid var(--option-neutral-border);
    background: var(--option-neutral-bg);
    text-decoration: none;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border var(--transition-fast);
    box-shadow: var(--option-neutral-shadow);
    color: var(--option-neutral-text);
}

.option-tile:hover {
    transform: translateY(-3px);
    box-shadow: 0 18px 34px rgba(15, 23, 42, 0.18);
    border-color: rgba(37, 99, 235, 0.25);
}

.option-tile__content {
    display: grid;
    gap: 0.25rem;
}

.option-tile__title {
    font-size: 1.05rem;
    font-weight: 700;
    color: inherit;
}

.option-tile__description {
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--option-neutral-subtext);
}

.option-tile__arrow {
    font-size: 1.2rem;
    color: inherit;
}

.option-tile--primary {
    border-color: transparent;
    background: var(--option-primary-bg);
    color: var(--option-primary-text);
    box-shadow: var(--option-primary-shadow);
}

.option-tile--primary .option-tile__description {
    color: var(--option-primary-subtext);
}

.option-tile--primary:hover {
    box-shadow: 0 24px 48px rgba(29, 78, 216, 0.45);
}

.option-tile--secondary {
    border-color: transparent;
    color: var(--option-secondary-text);
    background: var(--option-secondary-bg);
    box-shadow: var(--option-secondary-shadow);
}

.option-tile--secondary .option-tile__description {
    color: var(--option-secondary-subtext);
}

.option-tile--neutral {
    background: var(--option-neutral-bg);
    color: var(--option-neutral-text);
}

.form-panel {
    display: grid;
    gap: 1.25rem;
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pane);
    padding: clamp(1.4rem, 3vw, 2rem);
    box-shadow: 0 20px 45px rgba(15, 23, 42, 0.12);
}

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

.form-group {
    display: grid;
    gap: 0.5rem;
}

.form-field {
    display: grid;
    gap: 0.45rem;
}

.field-label {
    display: flex;
    align-items: baseline;
    gap: 0.35rem;
    font-weight: 600;
    color: var(--color-text);
}

.field-required {
    color: var(--color-primary);
    font-weight: 700;
    font-size: 0.9em;
}

.field-input,
select.field-input,
textarea.field-input {
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--color-input-border);
    background: var(--color-input-bg);
    color: var(--color-text);
    padding: 0.85rem 1rem;
    font-size: 0.96rem;
    transition: border var(--transition-fast), box-shadow var(--transition-fast);
}

.field-input:focus-visible,
select.field-input:focus-visible,
textarea.field-input:focus-visible {
    outline: none;
    border-color: rgba(37, 99, 235, 0.6);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.field-input::placeholder {
    color: var(--color-input-placeholder);
}

.button {
    border: none;
    border-radius: 12px;
    font-weight: 700;
    font-size: 0.98rem;
    padding: 0.9rem 1.2rem;
    cursor: pointer;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 0.6rem;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}

.button--primary {
    background: var(--color-primary);
    color: var(--color-primary-text);
    box-shadow: 0 16px 30px rgba(37, 99, 235, 0.35);
}

.button--primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
}

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

.button--wide {
    width: min(420px, 100%);
}

.form-tip {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.alert {
    padding: 1rem 1.2rem;
    border-radius: 16px;
    font-weight: 600;
    border: 1px solid transparent;
}

.alert--error {
    background: var(--color-alert-error-bg);
    color: var(--color-alert-error-text);
}

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

.link:hover {
    text-decoration: underline;
}

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

.form-grid--auto {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.form-grid--split {
    grid-template-columns: minmax(140px, 180px) 1fr;
    align-items: end;
    gap: 1rem;
}

.form-fieldset {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pane);
    padding: 1.2rem 1.4rem;
    display: grid;
    gap: 0.85rem;
    background: var(--color-surface-alt);
}

.form-fieldset legend {
    font-weight: 700;
    color: var(--color-text);
    padding: 0 0.3rem;
    margin-left: -0.3rem;
}

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    line-height: 1.45;
    color: var(--color-text-muted);
    font-weight: 600;
}

.form-checkbox input {
    margin-top: 0.25rem;
}

.helper-text {
    font-size: 0.85rem;
    color: var(--color-text-subtle);
    margin: 0;
}

.helper-text strong {
    color: var(--color-text);
}

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

.text-small {
    font-size: 0.88rem;
}

@media (max-width: 640px) {
    .page-header {
        flex-direction: row-reverse;
        gap: 1rem;
    }

    .page-header__actions {
        gap: 0.6rem;
    }

    .theme-switch {
        font-size: 1rem;
    }

    .language-picker__menu {
        left: 0;
        right: auto;
    }

    .form-grid--split {
        grid-template-columns: 1fr;
    }
}