:root {
    color-scheme: dark;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: #f6f8fc;
    background: #09101d;
    font-synthesis: none;
}

* { box-sizing: border-box; }

body {
    min-width: 320px;
    min-height: 100vh;
    margin: 0;
    background:
        radial-gradient(circle at 15% 10%, rgba(58, 132, 255, .2), transparent 32rem),
        radial-gradient(circle at 90% 85%, rgba(44, 210, 170, .13), transparent 28rem),
        #09101d;
}

button, input { font: inherit; }
a { color: #91bdff; }
a:hover { color: #bfdaff; }

.auth-shell {
    display: grid;
    min-height: 100vh;
    place-items: center;
    padding: 2rem 1rem;
}

.auth-panel {
    width: min(100%, 29rem);
    padding: clamp(1.5rem, 5vw, 2.5rem);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: 1.5rem;
    background: rgba(17, 28, 47, .9);
    box-shadow: 0 2rem 5rem rgba(0,0,0,.35);
    backdrop-filter: blur(18px);
}

.auth-brand {
    display: flex;
    align-items: center;
    gap: .7rem;
    margin-bottom: 2.25rem;
    color: #dce8fb;
    font-size: .9rem;
    font-weight: 750;
    letter-spacing: .12em;
    text-transform: uppercase;
}

.auth-brand__mark {
    width: 2rem;
    height: 2rem;
    padding: .32rem;
    border-radius: .65rem;
    background: linear-gradient(135deg, #73a9ff, #4ce1b5);
    box-shadow: 0 .5rem 1.5rem rgba(76, 180, 255, .2);
    fill: none;
    stroke: #08111f;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 3;
}

h1 { margin: 0; font-size: clamp(1.75rem, 6vw, 2.25rem); line-height: 1.1; letter-spacing: -.035em; }
.auth-intro { margin: .8rem 0 2rem; color: #aab7ca; line-height: 1.55; }
.auth-intro--lead { margin-bottom: .55rem; color: #d5deeb; font-size: 1.08rem; }
.auth-kicker { margin: 0 0 .65rem; color: #70d9bb; font-size: .76rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.onboarding-copy { margin: 0 0 2rem; color: #9ba9bd; line-height: 1.6; }
.onboarding-page[hidden] { display: none; }
.onboarding-page > .auth-button { width: 100%; }

.auth-form { display: grid; gap: 1.1rem; }
.field { display: grid; gap: .45rem; }
.field label { color: #dbe4f2; font-size: .88rem; font-weight: 650; }
.field input {
    width: 100%;
    min-height: 3.2rem;
    padding: .8rem .95rem;
    border: 1px solid #35435a;
    border-radius: .8rem;
    outline: none;
    color: #f7f9fc;
    background: #0d1728;
    transition: border-color .15s, box-shadow .15s;
}
.field input::placeholder { color: #718097; }
.field input:focus { border-color: #69a4ff; box-shadow: 0 0 0 3px rgba(105,164,255,.16); }
.field-help { margin: -.1rem 0 0; color: #8998ae; font-size: .78rem; line-height: 1.45; }
.password-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .85rem; }
.password-requirements { padding: 1rem; border: 1px solid rgba(118,172,255,.2); border-radius: .8rem; color: #aebbd0; background: rgba(73,120,184,.09); font-size: .8rem; line-height: 1.5; }
.password-requirements strong { display: block; margin-bottom: .35rem; color: #dce7f7; font-size: .86rem; }
.password-requirements ul { display: grid; gap: .2rem; margin: .25rem 0 0; padding-left: 1.2rem; }

.auth-button {
    min-height: 3.2rem;
    margin-top: .35rem;
    border: 0;
    border-radius: .8rem;
    color: #07121f;
    background: linear-gradient(135deg, #76acff, #4ce1b5);
    box-shadow: 0 .7rem 1.8rem rgba(57, 160, 213, .2);
    cursor: pointer;
    font-weight: 800;
}
.auth-button:hover { filter: brightness(1.07); }
.auth-button:focus-visible { outline: 3px solid rgba(145,189,255,.55); outline-offset: 3px; }

.auth-alert, .errorlist {
    margin: 0 0 1.2rem;
    padding: .8rem .95rem;
    border: 1px solid rgba(255,255,255,.1);
    border-radius: .75rem;
    font-size: .87rem;
    line-height: 1.45;
    list-style-position: inside;
}
.auth-alert--success { color: #baf5dd; background: rgba(40,175,130,.13); }
.auth-alert--error, .errorlist { color: #ffc8ce; background: rgba(229,80,98,.12); }
.field .errorlist { margin: 0; padding: .6rem .75rem; }

.auth-switch { margin: 1.8rem 0 0; color: #9ba9bd; text-align: center; font-size: .9rem; }
.auth-switch a { font-weight: 700; }

.profile-list { display: grid; gap: .75rem; margin: 0 0 1.75rem; }
.profile-row { display: flex; justify-content: space-between; gap: 1rem; padding: .85rem 0; border-bottom: 1px solid rgba(255,255,255,.08); }
.profile-row dt { color: #8f9db1; }
.profile-row dd { margin: 0; font-weight: 650; text-align: right; overflow-wrap: anywhere; }
.app-grid { display: grid; gap: .75rem; }
.app-link { display: flex; align-items: center; justify-content: space-between; min-height: 3.25rem; padding: .8rem 1rem; border: 1px solid #34425a; border-radius: .8rem; color: #eaf1fb; background: #101c2f; font-weight: 700; text-decoration: none; }
.app-link::after { content: "\2192"; color: #76acff; font-size: 1.2rem; }
.app-link:hover { border-color: #58769f; color: #fff; background: #15233a; }
.app-link--logout { margin-top: .25rem; color: #ffbcc4; }
.app-link--logout::after { color: #ff9ba7; }

@media (max-width: 420px) {
    .auth-shell { padding: 0; }
    .auth-panel { min-height: 100vh; border: 0; border-radius: 0; }
    .password-grid { grid-template-columns: 1fr 1fr; gap: .6rem; }
}

@media (prefers-reduced-motion: reduce) {
    * { scroll-behavior: auto !important; transition: none !important; }
}