/* ===================================================================
   auth.css — login / register / forgot / reset / verify
   Split layout: brand panel (deep navy + glow) + form card.
   Colors come only from tokens.css variables.
   =================================================================== */

:root {
    --auth-ink: color-mix(in srgb, var(--foreground) 88%, var(--primary));
    --auth-ink-fg: var(--background);
    --auth-ink-muted: color-mix(in srgb, var(--background) 70%, transparent);
    --auth-ink-line: color-mix(in srgb, var(--background) 14%, transparent);
}
.dark {
    --auth-ink: color-mix(in srgb, var(--card) 72%, var(--accent));
    --auth-ink-fg: var(--foreground);
    --auth-ink-muted: var(--muted-foreground);
    --auth-ink-line: color-mix(in srgb, var(--foreground) 10%, transparent);
}

/* ---------- Shell ---------- */
.auth-shell {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    max-width: 1040px;
    margin: clamp(24px, 5vw, 56px) auto clamp(32px, 6vw, 72px);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: calc(var(--radius) + 8px);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

/* ---------- Brand panel ---------- */
.auth-brand {
    position: relative;
    isolation: isolate;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 36px;
    padding: clamp(32px, 4.5vw, 52px);
    background:
        radial-gradient(70% 55% at 0% 0%, color-mix(in srgb, var(--primary) 42%, transparent), transparent 70%),
        radial-gradient(55% 45% at 100% 100%, color-mix(in srgb, var(--brand-gold) 26%, transparent), transparent 70%),
        radial-gradient(40% 35% at 85% 20%, color-mix(in srgb, var(--brand-cyan) 18%, transparent), transparent 70%),
        var(--auth-ink);
    color: var(--auth-ink-fg);
    overflow: hidden;
}
/* subtle grid texture */
.auth-brand::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background-image:
        linear-gradient(var(--auth-ink-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--auth-ink-line) 1px, transparent 1px);
    background-size: 36px 36px;
    -webkit-mask-image: radial-gradient(80% 70% at 30% 20%, #000 0%, transparent 75%);
    mask-image: radial-gradient(80% 70% at 30% 20%, #000 0%, transparent 75%);
    opacity: 0.55;
}
/* dragon watermark */
.auth-brand::after {
    content: "";
    position: absolute;
    right: -70px;
    bottom: -70px;
    z-index: -1;
    width: 300px;
    height: 300px;
    background: url("../img/logo-mark.png") center / contain no-repeat;
    opacity: 0.1;
    transform: rotate(-12deg);
    pointer-events: none;
}

.auth-brand__logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 6px 14px 6px 6px;
    margin-bottom: 26px;
    border: 1px solid var(--auth-ink-line);
    border-radius: var(--radius-pill);
    background: color-mix(in srgb, var(--auth-ink-fg) 6%, transparent);
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: var(--tracking-kicker);
    text-transform: uppercase;
    color: var(--auth-ink-fg);
}
.auth-brand__logo img {
    width: 30px;
    height: 30px;
    border-radius: 50%;
}

.auth-brand__headline {
    font-family: var(--font-serif);
    font-size: clamp(1.75rem, 3.2vw, 2.45rem);
    font-weight: 600;
    line-height: 1.12;
    color: var(--auth-ink-fg);
    margin: 0 0 14px;
    text-wrap: balance;
}
.auth-brand__sub {
    color: var(--auth-ink-muted);
    font-size: 1.02rem;
    max-width: 40ch;
    margin: 0 0 30px;
}

.auth-features {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 18px;
}
.auth-features li {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}
.auth-features li > span:last-child {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}
.auth-features b {
    font-weight: 600;
    font-size: 0.98rem;
    color: var(--auth-ink-fg);
}
.auth-features li > span:last-child > span {
    color: var(--auth-ink-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}
.auth-features__icon {
    flex: none;
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--brand-cyan);
    background:
        linear-gradient(var(--auth-ink), var(--auth-ink)) padding-box,
        var(--brand-gradient) border-box;
    border: 1px solid transparent;
    box-shadow: 0 6px 18px -8px color-mix(in srgb, var(--primary) 70%, transparent);
}
.auth-features__icon svg { width: 16px; height: 16px; }

.auth-brand__foot {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
    padding-top: 22px;
    border-top: 1px solid var(--auth-ink-line);
    color: var(--auth-ink-muted);
    font-size: 0.86rem;
}
.auth-brand__foot svg {
    flex: none;
    width: 18px;
    height: 18px;
    padding: 2px;
    border-radius: 50%;
    color: var(--success);
    background: color-mix(in srgb, var(--success) 16%, transparent);
}

/* ---------- Form pane ---------- */
.auth-pane {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: clamp(28px, 4.5vw, 56px);
    min-width: 0;
}
.auth-pane > h1,
.auth > h1 {
    font-family: var(--font-serif);
    font-size: clamp(1.7rem, 3vw, 2.1rem);
    font-weight: 600;
    margin: 0 0 22px;
}
.auth-pane__lead {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin: -8px 0 20px;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid color-mix(in srgb, var(--brand-gold) 38%, var(--border));
    background: color-mix(in srgb, var(--brand-gold) 9%, var(--card));
    color: var(--foreground);
    font-size: 0.92rem;
    line-height: 1.5;
}
.auth-pane__lead::before {
    content: "";
    flex: none;
    width: 8px;
    height: 8px;
    margin-top: 7px;
    border-radius: 50%;
    background: var(--brand-gold);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand-gold) 22%, transparent);
}

.auth-pane .form,
.auth .form { gap: 16px; }
.auth-pane .form label,
.auth .form label { font-weight: 600; font-size: 0.88rem; }
.auth-pane .form input,
.auth .form input {
    background: var(--background);
    border-radius: var(--radius-sm);
    min-height: 46px;
}
.auth-pane .form input:hover,
.auth .form input:hover { border-color: color-mix(in srgb, var(--primary) 35%, var(--input)); }
.auth-pane .form input.is-invalid { border-color: var(--destructive); }
.auth-pane .form input.is-invalid:focus { box-shadow: 0 0 0 3px color-mix(in srgb, var(--destructive) 22%, transparent); }
.auth-pane .form input.is-valid { border-color: color-mix(in srgb, var(--success) 70%, var(--input)); }

/* Submit buttons: login/register/verify use a bare .btn */
.auth-pane .form button[type="submit"],
.auth .form button[type="submit"] {
    width: 100%;
    min-height: 48px;
    margin-top: 6px;
    color: var(--primary-foreground);
    background: linear-gradient(135deg, var(--primary) 0%, color-mix(in srgb, var(--primary) 72%, var(--brand-cyan)) 100%);
    border: 1px solid color-mix(in srgb, var(--primary) 60%, transparent);
    box-shadow: 0 10px 24px -12px color-mix(in srgb, var(--primary) 80%, transparent), var(--shadow-sm);
}
.auth-pane .form button[type="submit"]:hover,
.auth .form button[type="submit"]:hover {
    color: var(--primary-foreground);
    filter: brightness(1.06);
    box-shadow: 0 14px 30px -12px color-mix(in srgb, var(--primary) 85%, transparent), var(--shadow-md);
}
.auth-pane .form button[type="submit"]:disabled,
.auth .form button[type="submit"]:disabled { cursor: progress; opacity: 0.85; transform: none; }
.auth-pane .form button[data-loading="true"]::before {
    content: "";
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid color-mix(in srgb, var(--primary-foreground) 35%, transparent);
    border-top-color: var(--primary-foreground);
    animation: auth-spin 0.7s linear infinite;
}
@keyframes auth-spin { to { transform: rotate(360deg); } }

/* ---------- Password field ---------- */
.field-pw {
    position: relative;
    display: block;
}
.field-pw input { padding-right: 52px; }
.pw-toggle {
    position: absolute;
    top: 50%;
    right: 5px;
    transform: translateY(-50%);
    width: 40px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 0;
    border-radius: var(--radius-xs);
    background: transparent;
    color: var(--muted-foreground);
    cursor: pointer;
    transition: color 0.15s var(--ease), background 0.15s var(--ease);
}
.pw-toggle:hover { color: var(--foreground); background: var(--secondary); }
.pw-toggle:focus-visible { outline: 2px solid var(--ring); outline-offset: 0; }
.pw-toggle svg, .pw-eye { width: 18px; height: 18px; }
.pw-toggle[aria-label] { line-height: 0; }

/* ---------- Strength meter ---------- */
.pw-strength {
    display: flex;
    align-items: center;
    gap: 10px;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.2s var(--ease), opacity 0.2s var(--ease), margin 0.2s var(--ease);
    --pw-color: var(--muted-foreground);
    --pw-width: 0%;
}
.pw-strength.is-active {
    max-height: 24px;
    opacity: 1;
    margin-top: 2px;
}
.pw-strength[data-score="1"] { --pw-color: var(--destructive); --pw-width: 25%; }
.pw-strength[data-score="2"] { --pw-color: var(--warning); --pw-width: 50%; }
.pw-strength[data-score="3"] { --pw-color: var(--chart-2); --pw-width: 75%; }
.pw-strength[data-score="4"] { --pw-color: var(--success); --pw-width: 100%; }
.pw-strength__bar {
    position: relative;
    flex: 1 1 auto;
    height: 6px;
    border-radius: var(--radius-pill);
    background: var(--muted);
    overflow: hidden;
}
/* four segment ticks */
.pw-strength__bar::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg,
        transparent calc(25% - 1px), var(--card) calc(25% - 1px), var(--card) 25%,
        transparent 25%, transparent calc(50% - 1px), var(--card) calc(50% - 1px), var(--card) 50%,
        transparent 50%, transparent calc(75% - 1px), var(--card) calc(75% - 1px), var(--card) 75%,
        transparent 75%);
}
.pw-strength__fill {
    display: block;
    height: 100%;
    width: var(--pw-width);
    background: var(--pw-color);
    border-radius: inherit;
    transition: width 0.25s var(--ease), background 0.25s var(--ease);
}
.pw-strength__label {
    flex: none;
    min-width: 4.5em;
    text-align: right;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--pw-color);
}

/* ---------- Inline messages ---------- */
.field-msg {
    display: block;
    min-height: 0;
    font-size: 0.8rem;
    font-weight: 500;
    line-height: 1.4;
    color: var(--muted-foreground);
}
.field-msg:empty { display: none; }
.field-msg.is-error { color: var(--destructive); }
.field-msg.is-ok { color: var(--success); }
.field-msg.is-error::before { content: "! "; font-weight: 700; }
.field-msg.is-ok::before { content: "\2713  "; font-weight: 700; }

.auth-pane .form .hint,
.auth .form .hint {
    text-align: left;
    margin: 0;
    font-size: 0.8rem;
    font-weight: 400;
}
.auth-pane > .hint,
.auth > .hint {
    text-align: center;
    margin: 16px 0 0;
    font-size: 0.9rem;
}
.auth-pane > .hint + .hint { margin-top: 8px; }
.auth-pane > .hint a,
.auth > .hint a { font-weight: 600; }

.auth-pane .alert,
.auth .alert { border-radius: var(--radius-sm); }

/* Turnstile widget */
.cf-turnstile {
    display: flex;
    justify-content: center;
    min-height: 65px;
}

/* ---------- Single-card variant (forgot / reset / verify) ---------- */
.auth {
    position: relative;
    max-width: 440px;
    margin: clamp(32px, 7vw, 80px) auto;
    padding: clamp(28px, 5vw, 40px);
    border-radius: calc(var(--radius) + 6px);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    isolation: isolate;
}
.auth::before {
    content: "";
    position: absolute;
    inset: 0 0 auto;
    height: 3px;
    background: var(--brand-gradient);
}
.auth::after {
    content: "";
    position: absolute;
    top: -120px;
    left: 50%;
    z-index: -1;
    width: 360px;
    height: 240px;
    transform: translateX(-50%);
    background: radial-gradient(closest-side, color-mix(in srgb, var(--primary) 16%, transparent), transparent);
    pointer-events: none;
}
.auth > h1 { text-align: center; }
.auth > .hint:first-of-type { margin-top: 0; }
.auth > .btn {
    display: flex;
    width: 100%;
    margin-top: 12px;
}
.auth > .form + .btn { margin-top: 12px; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
    .auth-shell {
        grid-template-columns: 1fr;
        max-width: 520px;
    }
    .auth-pane { order: -1; }
    .auth-brand {
        gap: 24px;
        padding: 28px 26px;
    }
    .auth-brand__logo { margin-bottom: 18px; }
    .auth-brand__sub { margin-bottom: 22px; }
    .auth-brand::after { width: 200px; height: 200px; right: -50px; bottom: -50px; }
}

@media (max-width: 560px) {
    .auth-shell {
        margin: 16px auto 32px;
        border-radius: var(--radius);
    }
    .auth-pane { padding: 26px 20px 28px; }
    .auth-brand { padding: 26px 20px; }
    .auth-brand__headline { font-size: 1.55rem; }
    .auth { padding: 28px 20px; border-radius: var(--radius); }
}

@media (prefers-reduced-motion: reduce) {
    .pw-strength,
    .pw-strength__fill { transition: none; }
    .auth-pane .form button[data-loading="true"]::before { animation: none; }
}