:root {
    --ink: #14213d;
    --ink-soft: rgba(20, 33, 61, 0.76);
    --paper: #f6f2e8;
    --panel: rgba(255, 255, 255, 0.88);
    --accent: #d6682d;
    --accent-dark: #9f461d;
    --accent-soft: #f3c6a5;
    --mint: #2a7f62;
    --rose: #9f3f48;
    --line: rgba(20, 33, 61, 0.14);
    --shadow: 0 28px 70px rgba(20, 33, 61, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    font-family: "Trebuchet MS", "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at 0% 0%, rgba(214, 104, 45, 0.18), transparent 26%),
        radial-gradient(circle at 100% 15%, rgba(42, 127, 98, 0.14), transparent 20%),
        linear-gradient(180deg, #fffaf2 0%, var(--paper) 100%);
}

a {
    color: var(--accent-dark);
}

code,
pre {
    font-family: Consolas, "Courier New", monospace;
}

.page-shell {
    width: min(1200px, calc(100% - 32px));
    margin: 0 auto;
    padding: 24px 0 40px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 22px;
    margin-bottom: 28px;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(14px);
    box-shadow: var(--shadow);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
    color: inherit;
}

.brand strong,
.brand small {
    display: block;
}

.brand small {
    color: var(--ink-soft);
}

.brand-mark {
    width: 52px;
    height: 52px;
    display: grid;
    place-items: center;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--accent), var(--accent-soft));
    color: #fff;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.content-shell {
    display: grid;
    gap: 20px;
}

.panel,
.hero-card {
    border: 1px solid var(--line);
    border-radius: 28px;
    background: var(--panel);
    box-shadow: var(--shadow);
}

.panel {
    padding: 24px;
}

.panel-compact {
    width: min(560px, 100%);
    margin: 0 auto;
}

.hero-card {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    padding: 28px;
}

.hero-card-tight {
    align-items: center;
}

.hero-actions,
.hero-actions-stack {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.hero-actions-stack {
    flex-direction: column;
    align-items: flex-end;
}

.eyebrow {
    font-size: 0.78rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent-dark);
    margin-bottom: 8px;
}

h1,
h2 {
    margin: 0 0 10px;
    line-height: 0.98;
}

h1 {
    font-size: clamp(2.2rem, 5vw, 3.7rem);
}

h2 {
    font-size: clamp(1.4rem, 3vw, 2rem);
}

.panel-copy {
    margin: 0;
    color: var(--ink-soft);
    line-height: 1.65;
}

.stack-form {
    display: grid;
    gap: 16px;
    margin-top: 20px;
}

.stack-form label,
.stack-form .checkbox-row {
    display: grid;
    gap: 8px;
}

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

input {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid rgba(20, 33, 61, 0.18);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.92);
    color: var(--ink);
}

input:focus {
    outline: 2px solid rgba(214, 104, 45, 0.24);
    border-color: rgba(214, 104, 45, 0.38);
}

.checkbox-row {
    grid-template-columns: auto 1fr;
    align-items: center;
}

.checkbox-row input {
    width: auto;
}

.primary-button,
.ghost-button,
.ghost-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 999px;
    padding: 13px 18px;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}

.primary-button {
    border: 0;
    background: linear-gradient(135deg, var(--accent), #b64d1d);
    color: #fff;
}

.primary-button.secondary-tone {
    background: linear-gradient(135deg, #255f7a, #11203d);
}

.ghost-button,
.ghost-link {
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.68);
    color: var(--ink);
}

.flash {
    padding: 16px 18px;
    border-radius: 18px;
    border: 1px solid transparent;
    font-weight: 700;
}

.flash-error {
    background: rgba(159, 63, 72, 0.12);
    border-color: rgba(159, 63, 72, 0.18);
    color: var(--rose);
}

.flash-success {
    background: rgba(42, 127, 98, 0.12);
    border-color: rgba(42, 127, 98, 0.18);
    color: var(--mint);
}

.warning-panel {
    border-style: dashed;
}

.empty-panel {
    text-align: center;
    padding: 44px 24px;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 18px;
}

.assignment-card {
    display: grid;
    gap: 18px;
}

.assignment-card-head,
.section-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin: 0;
}

.stats-grid dt,
.token-list dt {
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-soft);
    margin-bottom: 4px;
}

.stats-grid dd,
.token-list dd {
    margin: 0;
    font-weight: 700;
}

.badge-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.pill {
    display: inline-flex;
    align-items: center;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(20, 33, 61, 0.08);
    color: var(--ink);
    font-size: 0.92rem;
}

.card-actions {
    display: flex;
    justify-content: flex-start;
}

.two-column-layout {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.token-list {
    display: grid;
    gap: 14px;
    margin: 20px 0 0;
}

.callout-card {
    margin-top: 20px;
    padding: 18px;
    border-radius: 20px;
    background: rgba(20, 33, 61, 0.06);
}

.callout-card pre {
    margin: 14px 0 0;
    padding: 14px;
    overflow-x: auto;
    border-radius: 16px;
    background: #0f1b33;
    color: #f6f2e8;
}

.callout-warning {
    background: rgba(214, 104, 45, 0.1);
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    text-align: left;
    vertical-align: top;
    padding: 14px 12px;
    border-bottom: 1px solid var(--line);
}

th {
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-soft);
}

.inline-form {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
}

.gateway-shell {
    width: min(720px, 100%);
}

.gateway-status,
.gateway-context {
    margin-top: 18px;
    padding: 14px 16px;
    border-radius: 16px;
    background: rgba(20, 33, 61, 0.06);
}

.gateway-status[data-mode="success"] {
    background: rgba(42, 127, 98, 0.12);
    color: var(--mint);
}

.gateway-status[data-mode="error"] {
    background: rgba(159, 63, 72, 0.12);
    color: var(--rose);
}

.gateway-status[data-mode="info"] {
    color: var(--ink);
}

.auth-panel {
    margin-top: 6vh;
}

@media (max-width: 860px) {
    .topbar,
    .hero-card,
    .section-heading,
    .assignment-card-head {
        flex-direction: column;
    }

    .hero-actions-stack {
        align-items: stretch;
    }

    .two-column-layout,
    .form-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .page-shell {
        width: min(100% - 20px, 100%);
    }

    .topbar-actions {
        width: 100%;
        justify-content: flex-start;
        flex-wrap: wrap;
    }

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

    .stats-grid {
        grid-template-columns: 1fr;
    }
}