@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;600;700&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
    --bg: #f0f9ff;
    --bg-strong: #dff3ff;
    --ink: #082f49;
    --text: #0c4a6e;
    --muted: #47687b;
    --card: rgba(255, 255, 255, .92);
    --card-solid: #ffffff;
    --line: #c7e4f3;
    --line-strong: #86ccef;
    --primary: #0369a1;
    --primary-2: #0ea5e9;
    --success: #16a34a;
    --success-2: #22c55e;
    --warning: #d97706;
    --danger: #b42318;
    --shadow: 0 24px 70px rgba(7, 89, 133, .14);
    --radius-xl: 30px;
    --radius-lg: 22px;
    --radius-md: 16px;
    --focus: 0 0 0 4px rgba(14, 165, 233, .24);
}

* {
    box-sizing: border-box;
}

html {
    min-width: 320px;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    font-family: "Plus Jakarta Sans", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    font-size: 15px;
    line-height: 1.55;
    background:
            radial-gradient(circle at 10% 4%, rgba(34, 197, 94, .22), transparent 22rem),
            radial-gradient(circle at 88% 0%, rgba(14, 165, 233, .28), transparent 28rem),
            linear-gradient(135deg, #f8fcff 0%, var(--bg) 46%, #e6f8ee 100%);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: .42;
    background-image:
            linear-gradient(rgba(3, 105, 161, .08) 1px, transparent 1px),
            linear-gradient(90deg, rgba(3, 105, 161, .08) 1px, transparent 1px);
    background-size: 34px 34px;
    mask-image: linear-gradient(to bottom, #000 0%, transparent 76%);
}

a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 700;
    transition: color .2s ease, background-color .2s ease, border-color .2s ease, box-shadow .2s ease;
}

a:hover {
    color: #075985;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 0;
    box-shadow: var(--focus);
}

[x-cloak] {
    display: none !important;
}

header {
    position: sticky;
    top: 1rem;
    z-index: 10;
    width: min(1180px, calc(100% - 2rem));
    margin: 1rem auto 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: .85rem;
    border: 1px solid rgba(134, 204, 239, .72);
    border-radius: 999px;
    background: rgba(255, 255, 255, .82);
    backdrop-filter: blur(18px);
    box-shadow: 0 16px 48px rgba(8, 47, 73, .08);
}

.app-header {
    padding: .7rem;
}

main {
    position: relative;
    z-index: 1;
    width: min(1180px, calc(100% - 2rem));
    margin: 2rem auto 4rem;
}

h1, h2, h3, p {
    margin-top: 0;
}

h1 {
    max-width: 920px;
    margin-bottom: .75rem;
    font-size: clamp(2rem, 3.6vw, 3.45rem);
    line-height: 1.04;
    letter-spacing: -.045em;
}

h2 {
    margin-bottom: .75rem;
    font-size: clamp(1.15rem, 1.5vw, 1.55rem);
    letter-spacing: -.025em;
}

p {
    line-height: 1.65;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: .7rem;
    color: var(--ink);
    font-weight: 800;
    font-size: .98rem;
    letter-spacing: -.04em;
}

.brand::before {
    content: "AP";
    display: inline-grid;
    place-items: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 14px;
    color: #fff;
    font-family: "JetBrains Mono", monospace;
    font-size: .82rem;
    letter-spacing: -.08em;
    background: linear-gradient(135deg, var(--primary), var(--success));
    box-shadow: 0 12px 30px rgba(3, 105, 161, .25);
}

.nav-toggle {
    display: none;
}

.nav {
    display: flex;
    flex-wrap: nowrap;
    gap: .45rem;
    align-items: center;
    justify-content: flex-end;
}

.nav a,
.nav button,
.nav-dropdown-trigger {
    min-height: 2.6rem;
    padding: .68rem .9rem;
    border-radius: 999px;
    color: var(--text);
    background: transparent;
    box-shadow: none;
    white-space: nowrap;
    font-size: .9rem;
}

.nav a:hover,
.nav button:hover,
.nav a.active,
.nav-dropdown-trigger:hover,
.nav-dropdown-menu a.active {
    background: #e0f2fe;
    color: #075985;
    transform: none;
    box-shadow: none;
}

.nav a,
.nav button,
.nav-dropdown-trigger {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
}

.nav svg,
.nav-toggle svg {
    width: 1rem;
    height: 1rem;
    flex: 0 0 auto;
}

.nav-dropdown {
    position: relative;
}

.nav-dropdown-trigger .chevron {
    width: .88rem;
    height: .88rem;
}

.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + .65rem);
    right: 0;
    z-index: 20;
    display: grid;
    gap: .25rem;
    width: min(18rem, calc(100vw - 2rem));
    padding: .55rem;
    border: 1px solid rgba(134, 204, 239, .72);
    border-radius: 22px;
    background: rgba(255, 255, 255, .96);
    box-shadow: 0 22px 58px rgba(8, 47, 73, .14);
    backdrop-filter: blur(18px);
}

.nav-dropdown-menu a {
    justify-content: flex-start;
    min-height: 2.55rem;
    border-radius: 16px;
}

.nav-logout {
    margin: 0;
}

.nav-logout input[type="hidden"] {
    display: none;
}

.hero,
.card,
.auth-panel {
    border: 1px solid rgba(134, 204, 239, .74);
    border-radius: var(--radius-xl);
    background: var(--card);
    box-shadow: var(--shadow);
}

.hero {
    position: relative;
    overflow: hidden;
    display: grid;
    gap: 1rem;
    min-height: 260px;
    margin-bottom: 1.25rem;
    padding: clamp(1.4rem, 4vw, 3rem);
}

.hero::after {
    content: "";
    position: absolute;
    right: clamp(1rem, 5vw, 4rem);
    bottom: clamp(1rem, 4vw, 3rem);
    width: min(34vw, 320px);
    aspect-ratio: 1;
    border: 1px solid rgba(14, 165, 233, .36);
    border-radius: 42px;
    background:
            linear-gradient(135deg, rgba(3, 105, 161, .92), rgba(34, 197, 94, .84)),
            radial-gradient(circle at 70% 20%, rgba(255,255,255,.4), transparent 28%);
    clip-path: polygon(14% 0, 100% 0, 86% 100%, 0 100%);
    opacity: .16;
}

.card {
    padding: clamp(1.1rem, 3vw, 2rem);
}

.card + .card,
.hero + .card,
.grid + .card {
    margin-top: 1rem;
}

.auth-shell {
    width: min(980px, calc(100% - 2rem));
    min-height: 100vh;
    margin: 0 auto;
    display: grid;
    place-items: center;
    padding: 2rem 0;
}

.auth-panel {
    width: min(100%, 860px);
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
    overflow: hidden;
}

.auth-copy {
    padding: clamp(1.5rem, 4vw, 3rem);
    color: #fff;
    background:
            linear-gradient(135deg, rgba(3, 105, 161, .96), rgba(8, 47, 73, .92)),
            radial-gradient(circle at top right, rgba(34,197,94,.45), transparent 24rem);
}

.auth-copy .brand {
    color: #fff;
}

.auth-copy .brand::before {
    background: rgba(255, 255, 255, .18);
    border: 1px solid rgba(255,255,255,.25);
}

.auth-form {
    display: grid;
    gap: 1rem;
    padding: clamp(1.5rem, 4vw, 3rem);
    background: rgba(255, 255, 255, .94);
}

.eyebrow {
    display: inline-flex;
    width: fit-content;
    align-items: center;
    gap: .45rem;
    padding: .38rem .68rem;
    border: 1px solid rgba(14, 165, 233, .32);
    border-radius: 999px;
    color: var(--primary);
    background: #e0f2fe;
    font-size: .72rem;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
}

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

.mono {
    font-family: "JetBrains Mono", monospace;
    font-size: .84rem;
}

.breakable {
    overflow-wrap: anywhere;
    word-break: break-word;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.grid.compact {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.actions,
.inline-actions {
    display: flex;
    flex-wrap: wrap;
    gap: .7rem;
    align-items: center;
}

.steps {
    display: flex;
    flex-wrap: wrap;
    gap: .55rem;
    margin: 0 0 1.25rem;
}

.step {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: 2.25rem;
    padding: .46rem .78rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--muted);
    background: #fff;
    font-weight: 800;
    font-size: .82rem;
}

.step.active {
    color: #fff;
    border-color: var(--primary);
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
}

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

form.inline,
.table-actions form {
    display: inline-flex;
    flex-wrap: wrap;
    gap: .55rem;
    align-items: center;
}

form.inline label:not(.checkbox-inline),
.table-actions form label:not(.checkbox-inline) {
    width: min(12rem, 100%);
}

.captcha-image {
    width: 9.4rem;
    height: 3rem;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fff;
    object-fit: cover;
}

.checkbox-inline {
    display: inline-flex;
    width: auto;
    min-height: 2.3rem;
    align-items: center;
    gap: .45rem;
    padding: .35rem .55rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: #f8fcff;
    font-size: .82rem;
}

.checkbox-inline input {
    flex: 0 0 auto;
}

label,
.field {
    display: grid;
    gap: .45rem;
    color: var(--text);
    font-weight: 800;
    font-size: .92rem;
}

input,
select,
textarea,
button {
    font: inherit;
}

input,
select,
textarea {
    width: 100%;
    min-height: 2.85rem;
    padding: .78rem .9rem;
    border: 1px solid var(--line);
    border-radius: 15px;
    color: var(--ink);
    background: #fbfdff;
    font-size: .95rem;
    transition: border-color .2s ease, box-shadow .2s ease, background-color .2s ease;
}

input:hover,
select:hover,
textarea:hover {
    border-color: var(--line-strong);
}

textarea {
    min-height: 8rem;
    resize: vertical;
}

input[type="radio"],
input[type="checkbox"] {
    width: 1.05rem;
    min-height: 1.05rem;
    accent-color: var(--primary);
}

button,
.button {
    border: 0;
    border-radius: 16px;
    min-height: 2.85rem;
    padding: .82rem 1rem;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
    cursor: pointer;
    font-weight: 900;
    font-size: .92rem;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: .5rem;
    box-shadow: 0 14px 32px rgba(3, 105, 161, .18);
    transition: transform .2s ease, box-shadow .2s ease, background-color .2s ease;
}

button:hover,
.button:hover {
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 18px 40px rgba(3, 105, 161, .24);
}

.button.secondary,
button.secondary {
    color: var(--ink);
    background: #e0f2fe;
    box-shadow: none;
}

.button.warn,
button.warn {
    background: linear-gradient(135deg, var(--warning), #f59e0b);
}

.button.danger,
button.danger {
    background: linear-gradient(135deg, var(--danger), #dc2626);
}

.message,
.error,
.notice {
    padding: .9rem 1rem;
    border-radius: 18px;
    font-weight: 700;
    font-size: .92rem;
}

.message {
    background: rgba(34, 197, 94, .1);
    border: 1px solid rgba(34, 197, 94, .28);
    color: #166534;
}

.notice {
    background: rgba(14, 165, 233, .12);
    border: 1px solid rgba(14, 165, 233, .28);
    color: var(--text);
}

.error {
    background: rgba(180, 35, 24, .09);
    border: 1px solid rgba(180, 35, 24, .22);
    color: var(--danger);
}

.table-wrap,
.class-list {
    width: 100%;
    overflow: auto;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: #fff;
}

.class-list {
    max-height: 58vh;
}

table {
    width: 100%;
    min-width: 760px;
    border-collapse: collapse;
    font-size: .9rem;
}

th,
td {
    padding: .9rem;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

th {
    color: var(--muted);
    background: #f4fbff;
    font-size: .72rem;
    text-transform: uppercase;
    letter-spacing: .08em;
}

tbody tr:hover {
    background: #f8fcff;
}

tbody tr:last-child td {
    border-bottom: 0;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: .8rem;
    margin: 1rem 0;
}

.info-grid > div,
.metric,
.method-card,
.feature-card {
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: #fff;
}

.info-grid > div,
.metric {
    display: grid;
    gap: .28rem;
    padding: 1rem;
}

.metric strong,
.info-grid strong {
    font-size: 1.05rem;
}

.pill {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: .34rem .64rem;
    border-radius: 999px;
    background: #e0f2fe;
    color: var(--primary);
    font-size: .74rem;
    font-weight: 900;
}

.pill.success {
    color: #166534;
    background: #dcfce7;
}

.pill.danger {
    color: var(--danger);
    background: #fee2e2;
}

.method-card,
.feature-card {
    position: relative;
    display: grid;
    gap: .7rem;
    padding: 1rem;
    transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

label.method-card {
    cursor: pointer;
}

.option-row {
    display: flex;
    align-items: flex-start;
    gap: .75rem;
    margin: 1rem 0;
    padding: 1rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: #fff;
}

.option-row > span {
    display: grid;
    gap: .28rem;
}

.protection-options {
    display: grid;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: #fff;
}

.protection-options[hidden] {
    display: none !important;
}

.protection-options h2 {
    margin-bottom: 0;
}

.method-card:hover,
.feature-card:hover {
    border-color: var(--line-strong);
    box-shadow: 0 16px 34px rgba(3, 105, 161, .1);
}

.method-card:has(input:checked) {
    border-color: var(--success);
    box-shadow: 0 16px 34px rgba(22, 163, 74, .14);
}

.method-card > span:first-child {
    display: flex;
    align-items: center;
    gap: .65rem;
    cursor: pointer;
}

.feature-card strong,
.method-card strong {
    font-size: .96rem;
}

.code-block {
    padding: .8rem;
    border-radius: 15px;
    background: #082f49;
    color: #e0f2fe;
    overflow: auto;
}

.empty-state {
    display: grid;
    place-items: center;
    gap: .6rem;
    min-height: 180px;
    padding: 2rem;
    text-align: center;
}

@media (max-width: 820px) {
    header {
        position: static;
        display: grid;
        border-radius: 24px;
    }

    .app-header {
        grid-template-columns: minmax(0, 1fr) auto;
    }

    .nav-toggle {
        display: inline-flex;
        min-height: 2.6rem;
        padding: .68rem .9rem;
        border-radius: 999px;
        box-shadow: none;
    }

    .nav {
        grid-column: 1 / -1;
        display: none;
        width: 100%;
        padding-top: .55rem;
        justify-content: flex-start;
        flex-wrap: wrap;
    }

    .nav.is-open {
        display: flex;
    }

    .nav-dropdown {
        width: auto;
    }

    .nav-dropdown-menu {
        position: static;
        width: min(100%, 25rem);
        margin-top: .45rem;
        box-shadow: none;
        background: #f8fcff;
    }

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

    .hero {
        min-height: auto;
    }

    .hero::after {
        display: none;
    }
}

@media (max-width: 560px) {
    main,
    header,
    .auth-shell {
        width: min(100% - 1rem, 1180px);
    }

    .nav,
    .actions,
    .inline-actions,
    form.inline,
    .table-actions form,
    .checkbox-inline {
        display: grid;
        width: 100%;
        grid-template-columns: 1fr;
    }

    .app-header {
        align-items: stretch;
    }

    .brand {
        min-height: 2.9rem;
    }

    .nav-dropdown,
    .nav-dropdown-trigger,
    .nav-logout {
        width: 100%;
    }

    .nav-dropdown-menu {
        width: 100%;
    }

    .nav a,
    .nav button,
    .nav-dropdown-trigger,
    button,
    .button {
        width: 100%;
    }

    .nav a,
    .nav button,
    .nav-dropdown-trigger {
        justify-content: flex-start;
    }

    table {
        min-width: 680px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: .001ms !important;
        animation-duration: .001ms !important;
        animation-iteration-count: 1 !important;
    }
}