:root {
    --ink: #101827;
    --muted: #657083;
    --line: #d9e0ea;
    --paper: #ffffff;
    --soft: #f5f7fb;
    --primary: #0d9488;
    --primary-dark: #0f766e;
    --danger: #dc2626;
    --danger-dark: #b91c1c;
    --amber: #f59e0b;
    --violet: #6d5dfc;
    --shadow: 0 24px 70px rgba(16, 24, 39, .16);
}

* {
    box-sizing: border-box;
}

html,
body {
    min-height: 100%;
}

body {
    margin: 0;
    color: var(--ink);
    font: 16px/1.5 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    background:
        radial-gradient(circle at 20% 20%, rgba(13, 148, 136, .16), transparent 30%),
        radial-gradient(circle at 80% 10%, rgba(245, 158, 11, .18), transparent 26%),
        linear-gradient(135deg, #eff6ff 0%, #f8fafc 45%, #ecfdf5 100%);
}

button,
input,
select {
    font: inherit;
}

.page-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.panel {
    position: relative;
    width: min(100%, 620px);
    overflow: hidden;
    padding: 28px;
    border: 1px solid rgba(255, 255, 255, .72);
    border-radius: 8px;
    background: rgba(255, 255, 255, .88);
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
}

.panel::before {
    content: "";
    position: absolute;
    inset: 0 0 auto;
    height: 7px;
    background: linear-gradient(90deg, var(--primary), var(--amber), var(--violet));
}

.brand-row {
    display: flex;
    gap: 14px;
    align-items: center;
    margin-bottom: 18px;
}

.brand-mark {
    display: grid;
    place-items: center;
    flex: 0 0 54px;
    width: 54px;
    height: 54px;
    border-radius: 8px;
    color: #fff;
    font-weight: 900;
    letter-spacing: 0;
    background: linear-gradient(135deg, #111827, #0d9488);
    box-shadow: 0 14px 30px rgba(13, 148, 136, .28);
}

.eyebrow {
    margin: 0 0 4px;
    color: var(--primary-dark);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
}

h1,
h2 {
    margin: 0;
    letter-spacing: 0;
    line-height: 1.15;
}

h1 {
    font-size: clamp(28px, 6vw, 42px);
}

h2 {
    font-size: 24px;
}

.console-art {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin: 20px 0 24px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: linear-gradient(135deg, #111827, #1f2937);
}

.console-art span {
    min-height: 64px;
    border-radius: 6px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, .18), transparent),
        var(--tile, #0d9488);
}

.console-art span:nth-child(2) {
    --tile: #f59e0b;
}

.console-art span:nth-child(3) {
    --tile: #6d5dfc;
}

.console-art span:nth-child(4) {
    --tile: #ef4444;
}

.form {
    display: grid;
    gap: 10px;
}

label {
    color: #263244;
    font-weight: 800;
}

.input-row {
    display: flex;
    align-items: center;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--paper);
    transition: border-color .18s ease, box-shadow .18s ease;
}

.input-row:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(13, 148, 136, .16);
}

.prefix {
    align-self: stretch;
    display: grid;
    place-items: center;
    min-width: 58px;
    color: var(--primary-dark);
    font-weight: 900;
    background: #ccfbf1;
    border-right: 1px solid #99f6e4;
}

input,
input {
    width: 100%;
    min-height: 52px;
    border: 0;
    border-radius: 8px;
    color: var(--ink);
    background: var(--paper);
    outline: 0;
    padding: 0 14px;
}

.hint {
    margin: -2px 0 8px;
    color: var(--muted);
    font-size: 13px;
}

.operator-pill {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-height: 48px;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--soft);
}

.operator-pill span {
    color: var(--muted);
    font-size: 13px;
    font-weight: 800;
}

.operator-pill strong {
    color: var(--primary-dark);
    font-weight: 900;
}

.operator-pill strong.is-empty {
    color: var(--muted);
}

.primary-btn,
.danger-btn,
.ghost-btn {
    min-height: 50px;
    border: 0;
    border-radius: 8px;
    padding: 0 18px;
    font-weight: 900;
    cursor: pointer;
}

.primary-btn {
    margin-top: 8px;
    color: #fff;
    background: var(--primary);
}

.primary-btn:hover {
    background: var(--primary-dark);
}

.primary-btn:disabled,
.danger-btn:disabled {
    opacity: .55;
    cursor: wait;
}

.message {
    min-height: 24px;
    margin: 4px 0 0;
    color: var(--muted);
    font-weight: 700;
}

.message.is-error {
    color: var(--danger);
}

.message.is-success {
    color: var(--primary-dark);
}

.modal {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 20px;
    background: rgba(15, 23, 42, .62);
}

.modal[hidden] {
    display: none;
}

.modal-dialog {
    width: min(100%, 460px);
    padding: 24px;
    border-radius: 8px;
    background: #fff;
    box-shadow: var(--shadow);
}

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

.check-row {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--soft);
    font-weight: 700;
}

.check-row input {
    flex: 0 0 auto;
    width: 18px;
    min-height: 18px;
    margin-top: 3px;
}

.modal-actions {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 10px;
    margin-top: 18px;
}

.ghost-btn {
    color: #334155;
    background: #e2e8f0;
}

.danger-btn {
    color: #fff;
    background: var(--danger);
}

.danger-btn:not(:disabled):hover {
    background: var(--danger-dark);
}

@media (max-width: 520px) {
    .page-shell {
        padding: 12px;
        place-items: stretch;
    }

    .panel {
        padding: 22px 16px;
    }

    .brand-row,
    .modal-actions {
        grid-template-columns: 1fr;
    }

    .console-art {
        grid-template-columns: repeat(2, 1fr);
    }
}