:root {
    --brand-primary: #196cf3;
    --brand-primary-strong: #0c3dae;
    --brand-accent: #56f9e0;
    --brand-accent-soft: #78fcdc;
    --brand-surface: #060b14;
    --brand-ink: #f1f5f9;
    --brand-muted: #cbd5e1;
    --blue-950: var(--brand-surface);
    --blue-900: var(--brand-primary-strong);
    --blue-700: var(--brand-primary);
    --aqua-400: var(--brand-accent);
    --aqua-300: var(--brand-accent-soft);
    --ink: var(--brand-ink);
    --muted: var(--brand-muted);
    --line: rgb(120 252 220 / 22%);
    --panel: rgb(15 23 42 / 78%);
    --panel-strong: rgb(6 11 20 / 88%);
    --danger: #ffb4ab;
    --radius: 16px;
    --shadow: 0 20px 50px rgb(6 11 20 / 30%);
    color-scheme: dark;
    font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
    min-width: 320px;
    margin: 0;
    min-height: 100dvh;
    background: linear-gradient(160deg, #196cf3 0%, #0c3dae 44%, #1253d0 100%);
    color: var(--ink);
}

a { color: inherit; }

.wordmark {
    width: fit-content;
    color: var(--ink);
    font-size: 1.15rem;
    font-weight: 780;
    letter-spacing: .08em;
    text-decoration: none;
}

.brand-logo { display: block; max-width: 11rem; max-height: 2.25rem; object-fit: contain; }

.wordmark span { color: var(--aqua-400); }

.eyebrow {
    margin: 0 0 .65rem;
    color: var(--aqua-300);
    font-size: .72rem;
    font-weight: 760;
    letter-spacing: .09em;
    text-transform: uppercase;
}

.auth-page {
    display: grid;
    min-height: 100dvh;
    grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
}

.auth-intro {
    display: flex;
    min-height: 100%;
    flex-direction: column;
    justify-content: space-between;
    padding: clamp(2rem, 7vw, 6rem);
    background: linear-gradient(145deg, rgb(6 11 20 / 24%), transparent 65%);
}

.auth-intro-copy { max-width: 39rem; }
.auth-intro h1 { max-width: 13ch; margin: 0; font-size: clamp(2.6rem, 5.2vw, 5rem); letter-spacing: -.065em; line-height: .98; }
.auth-intro-copy > p:last-child { max-width: 33rem; margin: 1.5rem 0 0; color: var(--muted); font-size: 1.1rem; line-height: 1.65; }
.auth-notice { max-width: 29rem; margin: 3rem 0 0; color: var(--muted); font-size: .9rem; line-height: 1.5; }

.auth-panel { display: grid; place-items: center; padding: 2rem; background: rgb(6 11 20 / 18%); }
.login-card { width: min(100%, 29rem); padding: clamp(1.75rem, 4vw, 3rem); border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); box-shadow: var(--shadow); backdrop-filter: blur(12px); }
.login-heading h2, .section-heading h2 { margin: 0; letter-spacing: -.035em; }
.login-heading h2 { font-size: 2rem; }
.login-heading > p:last-child { margin: .85rem 0 0; color: var(--muted); line-height: 1.55; }
.login-form { display: grid; gap: 1.2rem; margin-top: 2rem; }
.field-group { display: grid; gap: .55rem; }
.field-group label { color: var(--ink); font-size: .9rem; font-weight: 680; }
.field-group input { width: 100%; min-height: 3rem; padding: .75rem .85rem; border: 1px solid var(--line); border-radius: 10px; outline: none; background: rgb(6 11 20 / 65%); color: var(--ink); font: inherit; }
.field-group input:focus { border-color: var(--aqua-400); box-shadow: 0 0 0 3px rgb(86 249 224 / 22%); }
.field-error { margin: 0; color: var(--danger); font-size: .84rem; }

.button-primary, .button-secondary, .button-quiet {
    display: inline-flex;
    min-height: 2.85rem;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    font: inherit;
    font-weight: 760;
    text-decoration: none;
    transition: transform .18s ease, background .18s ease, border-color .18s ease;
}

.button-primary { width: 100%; border: 0; background: var(--aqua-400); color: var(--blue-900); cursor: pointer; }
.button-primary:hover { background: var(--aqua-300); }
.button-secondary { padding: 0 1.1rem; border: 1px solid var(--line); background: rgb(15 23 42 / 56%); color: var(--ink); }
.button-quiet { width: 100%; border: 0; background: transparent; color: var(--muted); cursor: pointer; }
.button-primary:active, .button-secondary:active, .button-quiet:active { transform: translateY(1px); }
.button-quiet:hover { color: var(--aqua-300); }

.app-shell { display: grid; min-height: 100dvh; grid-template-columns: 16.25rem minmax(0, 1fr); }
.sidebar { display: flex; flex-direction: column; padding: 2rem 1.15rem 1.15rem; border-right: 1px solid var(--line); background: rgb(6 11 20 / 82%); }
.sidebar .wordmark { margin: 0 .85rem 3rem; }
.sidebar-nav { display: grid; gap: .35rem; }
.nav-item { padding: .8rem .85rem; border-left: 3px solid transparent; border-radius: 0 9px 9px 0; color: var(--muted); font-size: .94rem; font-weight: 660; text-decoration: none; }
.nav-item:hover { background: rgb(86 249 224 / 11%); color: var(--ink); }
.nav-item.is-active { border-left-color: var(--aqua-400); background: rgb(86 249 224 / 13%); color: var(--aqua-300); }
.logout-form { margin-top: auto; }
.workspace { width: min(100%, 1400px); padding: clamp(1.5rem, 4vw, 3.5rem); }
.page-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: 2.5rem; }
.page-header h1 { margin: 0; font-size: clamp(2rem, 4vw, 3.25rem); letter-spacing: -.055em; line-height: 1; }
.page-header p:not(.eyebrow) { margin: .85rem 0 0; color: var(--muted); line-height: 1.5; }
.secure-session { flex: 0 0 auto; padding: .55rem .8rem; border: 1px solid var(--line); border-radius: 999px; color: var(--aqua-300); font-size: .78rem; font-weight: 720; }

.balance-panel { display: flex; align-items: flex-end; justify-content: space-between; gap: 2rem; min-height: 16rem; padding: clamp(1.5rem, 4vw, 3rem); border: 1px solid rgb(86 249 224 / 28%); border-radius: var(--radius); background: linear-gradient(135deg, rgb(6 11 20 / 68%), rgb(15 23 42 / 55%)); box-shadow: var(--shadow); }
.balance-panel h2 { margin: 0; font-size: clamp(2.6rem, 5vw, 4.7rem); letter-spacing: -.065em; line-height: 1; }
.balance-panel p:last-child { margin: 1.1rem 0 0; color: var(--muted); }
.content-section { margin-top: 3rem; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 1rem; margin-bottom: 1.25rem; }
.section-heading h2 { font-size: 1.45rem; }
.text-link { color: var(--aqua-300); font-size: .9rem; font-weight: 720; text-decoration: none; }
.text-link:hover { color: var(--aqua-400); text-decoration: underline; }
.transaction-list { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.transaction-item { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.25rem 1.35rem; }
.transaction-item + .transaction-item { border-top: 1px solid var(--line); }
.transaction-item h3 { margin: 0; font-size: 1rem; }
.transaction-item p { margin: .3rem 0 0; color: var(--muted); font-size: .85rem; }
.transaction-item strong { color: var(--aqua-300); white-space: nowrap; }
.empty-state { padding: 2.25rem; border: 1px solid var(--line); border-radius: var(--radius); background: rgb(15 23 42 / 52%); }
.empty-state h3 { margin: 0; font-size: 1.1rem; }
.empty-state p { max-width: 40rem; margin: .65rem 0 0; color: var(--muted); line-height: 1.55; }

@media (max-width: 800px) {
    .auth-page, .app-shell { grid-template-columns: 1fr; }
    .auth-intro { min-height: 18rem; padding: 2rem 1.5rem; }
    .auth-intro h1 { font-size: clamp(2.25rem, 11vw, 3.4rem); }
    .auth-notice { display: none; }
    .auth-panel { padding: 1.5rem; }
    .sidebar { min-height: auto; flex-direction: row; align-items: center; gap: 1rem; padding: 1rem 1.25rem; border-right: 0; border-bottom: 1px solid var(--line); }
    .sidebar .wordmark { margin: 0 auto 0 0; }
    .sidebar-nav { display: flex; gap: .2rem; }
    .nav-item { padding: .5rem; border-left: 0; border-bottom: 2px solid transparent; border-radius: 0; font-size: .8rem; }
    .nav-item.is-active { border-left-color: transparent; border-bottom-color: var(--aqua-400); background: transparent; }
    .logout-form { width: auto; margin: 0; }
    .button-quiet { min-height: 2.25rem; padding: 0 .5rem; font-size: .8rem; }
    .workspace { padding: 1.5rem 1rem 2.5rem; }
    .page-header, .balance-panel, .section-heading { align-items: flex-start; flex-direction: column; }
    .secure-session { display: none; }
    .balance-panel { min-height: 0; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}