/* BuxePay design system — see design-system/buxepay/MASTER.md */

:root {
    --color-primary: #1D4ED8;
    --color-primary-hover: #1E40AF;
    --color-on-primary: #FFFFFF;
    --color-primary-soft: #DBEAFE;
    --color-primary-text: #1D4ED8;

    --color-background: #F8FAFC;
    --color-card: #FFFFFF;
    --color-foreground: #0F172A;
    --color-muted: #EEF2F7;
    --color-muted-foreground: #475569;
    --color-border: #E2E8F0;
    --color-border-strong: #CBD5E1;
    --color-ring: #1D4ED8;
    --color-frame: #0B1220;

    --color-success: #15803D;
    --color-success-bg: #DCFCE7;
    --color-success-border: #86EFAC;
    --color-warning: #B45309;
    --color-warning-bg: #FEF3C7;
    --color-danger: #B91C1C;
    --color-danger-bg: #FEE2E2;

    --bubble-me: #DBEAFE;
    --bubble-me-text: #0F172A;
    --bubble-me-meta: #475569;
    --bubble-them: #FFFFFF;
    --bubble-them-text: #0F172A;
    --bubble-meta: #64748B;
    --bubble-shadow: 0 1px 0.5px rgba(15, 23, 42, 0.13);
    --chat-wall: #E7EDF5;
    --chat-dot: rgba(29, 78, 216, 0.07);
    --sys-chip: #FFFFFF;

    --font-sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
    --text-xs: 12px;
    --text-sm: 14px;
    --text-base: 16px;
    --text-lg: 20px;
    --text-xl: 24px;
    --text-2xl: 32px;

    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-6: 24px;
    --space-8: 32px;
    --space-12: 48px;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-pill: 999px;
    --shadow-1: 0 1px 3px rgba(15, 23, 42, 0.08);
    --shadow-sheet: 0 -8px 24px rgba(15, 23, 42, 0.12);

    --duration-fast: 150ms;
    --duration-base: 250ms;
    --ease-out: cubic-bezier(0.2, 0, 0, 1);

    color-scheme: light;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-primary: #2563EB;
        --color-primary-hover: #1D4ED8;
        --color-primary-soft: #172554;
        --color-primary-text: #93C5FD;
        --color-background: #0F172A;
        --color-card: #182235;
        --color-foreground: #F1F5F9;
        --color-muted: #1E293B;
        --color-muted-foreground: #94A3B8;
        --color-border: #243147;
        --color-border-strong: #334155;
        --color-ring: #93C5FD;
        --color-frame: #020617;
        --color-success: #4ADE80;
        --color-success-bg: #052E16;
        --color-success-border: #166534;
        --color-warning: #FBBF24;
        --color-warning-bg: #422006;
        --color-danger: #F87171;
        --color-danger-bg: #450A0A;
        --shadow-1: 0 1px 3px rgba(0, 0, 0, 0.4);
        --shadow-sheet: 0 -8px 24px rgba(0, 0, 0, 0.5);
        --bubble-me: #1E3A8A;
        --bubble-me-text: #F1F5F9;
        --bubble-me-meta: #BFDBFE;
        --bubble-them: #1E293B;
        --bubble-them-text: #F1F5F9;
        --bubble-meta: #94A3B8;
        --bubble-shadow: 0 1px 0.5px rgba(0, 0, 0, 0.4);
        --chat-wall: #0B1220;
        --chat-dot: rgba(147, 197, 253, 0.06);
        --sys-chip: #1E293B;
        color-scheme: dark;
    }
}

:root[data-theme="dark"] {
    --color-primary: #2563EB;
    --color-primary-hover: #1D4ED8;
    --color-primary-soft: #172554;
    --color-primary-text: #93C5FD;
    --color-background: #0F172A;
    --color-card: #182235;
    --color-foreground: #F1F5F9;
    --color-muted: #1E293B;
    --color-muted-foreground: #94A3B8;
    --color-border: #243147;
    --color-border-strong: #334155;
    --color-ring: #93C5FD;
    --color-frame: #020617;
    --color-success: #4ADE80;
    --color-success-bg: #052E16;
    --color-success-border: #166534;
    --color-warning: #FBBF24;
    --color-warning-bg: #422006;
    --color-danger: #F87171;
    --color-danger-bg: #450A0A;
    --shadow-1: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-sheet: 0 -8px 24px rgba(0, 0, 0, 0.5);
    --bubble-me: #1E3A8A;
    --bubble-me-text: #F1F5F9;
    --bubble-me-meta: #BFDBFE;
    --bubble-them: #1E293B;
    --bubble-them-text: #F1F5F9;
    --bubble-meta: #94A3B8;
    --bubble-shadow: 0 1px 0.5px rgba(0, 0, 0, 0.4);
    --chat-wall: #0B1220;
    --chat-dot: rgba(147, 197, 253, 0.06);
    --sys-chip: #1E293B;
    color-scheme: dark;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--color-foreground);
    background-color: var(--color-frame);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    min-height: 100dvh;
    -webkit-font-smoothing: antialiased;
}

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

[hidden] { display: none !important; }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.icon-sm { width: 16px; height: 16px; }

/* ---------- Frame ---------- */
.app-container {
    width: 100%;
    max-width: 412px;
    height: 100vh;
    height: 100dvh;
    max-height: 892px;
    background-color: var(--color-background);
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.app {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    animation: fadeIn var(--duration-base) var(--ease-out);
}

.scroll {
    flex: 1;
    overflow-y: auto;
    min-height: 0;
}

/* ---------- Top bar ---------- */
.topbar {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    min-height: 56px;
    padding: var(--space-2) var(--space-2) var(--space-2) var(--space-4);
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border);
}

.topbar.has-back { padding-left: var(--space-1); }

.brand {
    font-weight: 700;
    font-size: var(--text-lg);
    color: var(--color-primary-text);
    letter-spacing: -0.01em;
    text-decoration: none;
}

.topbar-title {
    flex: 1;
    min-width: 0;
}

.topbar-title h1 {
    font-size: var(--text-base);
    font-weight: 600;
    line-height: 1.3;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.topbar-title p {
    font-size: var(--text-xs);
    color: var(--color-muted-foreground);
}

.spacer { flex: 1; }

.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: none;
    border-radius: var(--radius-pill);
    background: transparent;
    color: var(--color-muted-foreground);
    cursor: pointer;
    transition: background-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
}

.icon-btn:hover { background: var(--color-muted); color: var(--color-foreground); }

.get-app {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    min-height: 36px;
    padding: 0 var(--space-3);
    margin: 4px 0;
    border: none;
    border-radius: var(--radius-pill);
    background: var(--color-primary-soft);
    color: var(--color-primary-text);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--duration-fast) var(--ease-out);
}

.get-app:hover { background: color-mix(in srgb, var(--color-primary-soft) 80%, var(--color-primary)); }
.get-app:focus-visible { outline: 2px solid var(--color-ring); outline-offset: 2px; }

.steps {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.steps li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    font-size: var(--text-base);
}

.step-num {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-pill);
    background: var(--color-primary-soft);
    color: var(--color-primary-text);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-sm);
    font-weight: 700;
}

.icon.inline {
    display: inline-block;
    vertical-align: -3px;
    color: var(--color-primary-text);
}

/* ---------- Promo strip ---------- */
.promo-strip {
    background: var(--color-primary);
    color: var(--color-on-primary);
    text-align: center;
    font-size: var(--text-sm);
    font-weight: 600;
    padding: var(--space-2) var(--space-4);
}

.promo-pill {
    display: inline-flex;
    align-items: center;
    padding: 2px var(--space-3);
    border-radius: var(--radius-pill);
    background: var(--color-primary-soft);
    color: var(--color-primary-text);
    font-size: var(--text-xs);
    font-weight: 600;
}

/* ---------- Landing ---------- */
.landing {
    padding: var(--space-12) var(--space-4) var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.landing h2 {
    font-size: var(--text-2xl);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    text-wrap: balance;
}

.landing .lede {
    margin-top: var(--space-3);
    color: var(--color-muted-foreground);
}

.role-label {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-muted-foreground);
    margin-bottom: var(--space-3);
}

.role-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
}

.role-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
    min-height: 120px;
    padding: var(--space-4);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    background: var(--color-card);
    text-align: left;
    cursor: pointer;
    transition: border-color var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
}

.role-card:hover { border-color: var(--color-primary); }
.role-card:active { transform: scale(0.98); }

.role-card .icon-wrap {
    display: inline-flex;
    padding: var(--space-2);
    border-radius: var(--radius-sm);
    background: var(--color-primary-soft);
    color: var(--color-primary-text);
}

.role-card strong { font-size: var(--text-base); font-weight: 600; }
.role-card span { font-size: var(--text-sm); color: var(--color-muted-foreground); }

/* ---------- Forms ---------- */
.form {
    padding: var(--space-6) var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.form-intro h2 {
    font-size: var(--text-xl);
    font-weight: 600;
    line-height: 1.25;
}

.form-intro p {
    margin-top: var(--space-2);
    color: var(--color-muted-foreground);
}

.field label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    margin-bottom: var(--space-2);
}

.field .hint {
    font-size: var(--text-xs);
    color: var(--color-muted-foreground);
    margin-top: var(--space-1);
}

.field .error {
    font-size: var(--text-sm);
    color: var(--color-danger);
    margin-top: var(--space-1);
}

.input,
select.input {
    width: 100%;
    min-height: 48px;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    font-size: var(--text-base);
    background: var(--color-card);
    transition: border-color var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out);
}

.input::placeholder { color: var(--color-muted-foreground); opacity: 0.8; }

.input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 25%, transparent);
}

.input[aria-invalid="true"] { border-color: var(--color-danger); }

.input-prefix {
    position: relative;
}

.input-prefix span {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-muted-foreground);
    font-weight: 500;
    pointer-events: none;
}

.input-prefix .input { padding-left: 36px; font-variant-numeric: tabular-nums; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    width: 100%;
    min-height: 48px;
    padding: var(--space-3) var(--space-4);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    touch-action: manipulation;
    transition: background-color var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
}

.btn:active:not(:disabled) { transform: scale(0.98); }

.btn:focus-visible,
.icon-btn:focus-visible,
.role-card:focus-visible,
.inbox-card:focus-visible,
.text-btn:focus-visible,
.demo summary:focus-visible,
.demo button:focus-visible {
    outline: 2px solid var(--color-ring);
    outline-offset: 2px;
}

.btn-primary { background: var(--color-primary); color: var(--color-on-primary); }
.btn-primary:hover:not(:disabled) { background: var(--color-primary-hover); }

.btn-secondary {
    background: var(--color-card);
    color: var(--color-foreground);
    border-color: var(--color-border-strong);
}
.btn-secondary:hover:not(:disabled) { background: var(--color-muted); }

.btn:disabled {
    background: var(--color-muted);
    color: var(--color-muted-foreground);
    border-color: transparent;
    cursor: not-allowed;
}

.btn-done:disabled {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.text-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 var(--space-3);
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--color-muted-foreground);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
}

.text-btn:hover { color: var(--color-foreground); background: var(--color-muted); }
.text-btn.danger { color: var(--color-danger); }

/* ---------- Email sent ---------- */
.notice {
    padding: var(--space-12) var(--space-4);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-4);
}

.notice .icon-circle {
    display: inline-flex;
    padding: var(--space-4);
    border-radius: var(--radius-pill);
    background: var(--color-primary-soft);
    color: var(--color-primary-text);
}

.notice .icon-circle .icon { width: 28px; height: 28px; }

.notice h2 { font-size: var(--text-xl); font-weight: 600; }
.notice p { color: var(--color-muted-foreground); max-width: 32ch; }
.notice .btn { margin-top: var(--space-4); }

/* ---------- Deal room ---------- */
.pill-bar {
    display: flex;
    justify-content: center;
    padding: var(--space-2) var(--space-4);
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border);
}

.secured-pill {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-pill);
    background: var(--color-success-bg);
    color: var(--color-success);
    font-size: var(--text-sm);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.scroll.chat {
    background-color: var(--chat-wall);
    background-image: radial-gradient(circle, var(--chat-dot) 1.2px, transparent 1.6px);
    background-size: 18px 18px;
}

.messages {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: var(--space-3) var(--space-4) var(--space-4);
}

.messages > * + * { margin-top: var(--space-2); }
.messages > .bubble + .bubble:not(.first) { margin-top: 2px; }

.topbar .avatar { width: 36px; height: 36px; font-size: var(--text-xs); }

.intro {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    box-shadow: var(--shadow-1);
}

.intro-head {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-primary-text);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.intro p {
    font-size: var(--text-sm);
    color: var(--color-foreground);
}

.intro p + p { margin-top: var(--space-2); }
.intro .muted { color: var(--color-muted-foreground); }
.intro .promo-pill { margin-top: var(--space-3); }

.amount { font-weight: 700; font-variant-numeric: tabular-nums; }

.nudge {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-primary-soft);
    padding: var(--space-3) var(--space-4);
}

.nudge p {
    display: flex;
    gap: var(--space-2);
    align-items: flex-start;
    font-size: var(--text-sm);
    color: var(--color-foreground);
}

.nudge p .icon { margin-top: 2px; color: var(--color-primary-text); }

.nudge-actions {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-2);
}

.btn-compact {
    width: auto;
    min-height: 44px;
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
}

.sys {
    align-self: center;
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    max-width: 90%;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    background: var(--sys-chip);
    color: var(--color-muted-foreground);
    box-shadow: var(--bubble-shadow);
    font-size: var(--text-xs);
    text-align: center;
}

.sys.lock {
    border-radius: var(--radius-sm);
    background: var(--color-primary-soft);
    color: var(--color-primary-text);
    padding: var(--space-2) var(--space-3);
}

.sys.closing {
    display: block;
    border-radius: var(--radius-sm);
    background: var(--color-warning-bg);
    color: var(--color-warning);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
}

/* Chat bubbles: tail on the first bubble of each run, time tucked bottom-right */
.bubble {
    position: relative;
    max-width: 82%;
    padding: 6px 8px 6px 10px;
    border-radius: 8px;
    font-size: 15px;
    line-height: 1.4;
    box-shadow: var(--bubble-shadow);
    overflow-wrap: anywhere;
}

.bubble.me {
    align-self: flex-end;
    background: var(--bubble-me);
    color: var(--bubble-me-text);
}

.bubble.them {
    align-self: flex-start;
    background: var(--bubble-them);
    color: var(--bubble-them-text);
}

.bubble.me.first { border-top-right-radius: 0; }
.bubble.them.first { border-top-left-radius: 0; }

.bubble.first::after {
    content: "";
    position: absolute;
    top: 0;
    width: 0;
    height: 0;
    border-style: solid;
}

.bubble.me.first::after {
    right: -8px;
    border-width: 0 0 10px 8px;
    border-color: transparent transparent transparent var(--bubble-me);
}

.bubble.them.first::after {
    left: -8px;
    border-width: 0 8px 10px 0;
    border-color: transparent var(--bubble-them) transparent transparent;
}

.bubble.me.first { margin-right: 8px; }
.bubble.them.first { margin-left: 8px; }
.bubble.me:not(.first) { margin-right: 8px; }
.bubble.them:not(.first) { margin-left: 8px; }

.bubble .who {
    display: block;
    margin-bottom: 2px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary-text);
}

.bubble .meta {
    float: right;
    display: inline-flex;
    align-items: center;
    gap: 3px;
    margin: 6px 0 -4px 12px;
    font-size: 11px;
    line-height: 1;
    color: var(--bubble-meta);
    font-variant-numeric: tabular-nums;
}

.bubble.me .meta { color: var(--bubble-me-meta); }
.bubble .meta .icon { width: 14px; height: 14px; }

.actionbar {
    padding: var(--space-3) var(--space-4) 0;
    background: var(--color-card);
    border-top: 1px solid var(--color-border);
}

.action-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2);
}

.action-row.single { grid-template-columns: 1fr; }

.action-hint {
    min-height: 20px;
    margin-top: var(--space-1);
    font-size: var(--text-xs);
    color: var(--color-muted-foreground);
    text-align: center;
    font-variant-numeric: tabular-nums;
}

.action-extra {
    display: flex;
    justify-content: center;
}

.composer {
    display: flex;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4) calc(var(--space-3) + env(safe-area-inset-bottom));
    background: var(--color-card);
}

.composer .input {
    min-height: 44px;
    border-radius: var(--radius-pill);
    padding: var(--space-2) var(--space-4);
    border-color: transparent;
    background: var(--color-muted);
}

.composer .input:focus { background: var(--color-card); }

.send-btn {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    border: none;
    border-radius: var(--radius-pill);
    background: var(--color-primary);
    color: var(--color-on-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.send-btn:disabled { background: var(--color-muted); color: var(--color-muted-foreground); cursor: not-allowed; }
.send-btn:focus-visible { outline: 2px solid var(--color-ring); outline-offset: 2px; }

/* ---------- Seller inbox ---------- */
.inbox-head {
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.inbox-head p { font-size: var(--text-sm); color: var(--color-muted-foreground); }

.inbox-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding: 0 var(--space-4) var(--space-6);
}

.inbox-card {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    min-height: 64px;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-card);
    text-align: left;
    cursor: pointer;
    transition: border-color var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out);
}

.inbox-card:hover { border-color: var(--color-border-strong); }

.inbox-card.secured {
    background: var(--color-success-bg);
    border-color: var(--color-success-border);
}

.avatar {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    border-radius: var(--radius-pill);
    background: var(--color-primary-soft);
    color: var(--color-primary-text);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--text-sm);
}

.inbox-card .meta { flex: 1; min-width: 0; }
.inbox-card strong { display: block; font-size: var(--text-base); font-weight: 600; }

.inbox-card .preview {
    display: block;
    font-size: var(--text-sm);
    color: var(--color-muted-foreground);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.inbox-card .icon { color: var(--color-muted-foreground); }

/* ---------- Closed ---------- */
.closed .icon-circle { background: var(--color-muted); color: var(--color-muted-foreground); }

/* ---------- Sheet ---------- */
.sheet-overlay {
    position: absolute;
    inset: 0;
    background: rgba(2, 6, 23, 0.6);
    display: flex;
    align-items: flex-end;
    z-index: 100;
}

.sheet {
    width: 100%;
    max-height: 90%;
    overflow-y: auto;
    background: var(--color-card);
    border-top-left-radius: var(--radius-lg);
    border-top-right-radius: var(--radius-lg);
    padding: var(--space-4) var(--space-4) calc(var(--space-6) + env(safe-area-inset-bottom));
    box-shadow: var(--shadow-sheet);
    animation: slideUp var(--duration-base) var(--ease-out);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.sheet-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sheet-head h2 { font-size: var(--text-lg); font-weight: 600; }
.sheet-head .icon-btn { margin-right: calc(var(--space-2) * -1); }
.sheet p.sub { font-size: var(--text-sm); color: var(--color-muted-foreground); }

.breakdown {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-1) var(--space-4);
}

.breakdown-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-3) 0;
    font-size: var(--text-sm);
    font-variant-numeric: tabular-nums;
}

.breakdown-row + .breakdown-row { border-top: 1px solid var(--color-border); }
.breakdown-row > span:first-child { color: var(--color-muted-foreground); }
.breakdown-row.total { font-size: var(--text-base); font-weight: 700; }
.breakdown-row.total > span:first-child { color: var(--color-foreground); }

.strike { text-decoration: line-through; color: var(--color-muted-foreground); margin-right: var(--space-2); }
.free { color: var(--color-success); font-weight: 600; }

.copy-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--color-muted);
    border-radius: var(--radius-md);
}

.copy-row small {
    display: block;
    font-size: var(--text-xs);
    color: var(--color-muted-foreground);
}

.copy-row .mono {
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    letter-spacing: 0.04em;
}

.copy-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    min-height: 44px;
    padding: 0 var(--space-3);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    background: var(--color-card);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
}

.copy-btn:focus-visible { outline: 2px solid var(--color-ring); outline-offset: 2px; }

.waiting {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-muted-foreground);
}

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--color-border-strong);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
}

.verified {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-sm);
    background: var(--color-success-bg);
    color: var(--color-success);
    font-size: var(--text-sm);
    font-weight: 600;
}

/* ---------- Toast ---------- */
.toast {
    position: absolute;
    left: 50%;
    bottom: 140px;
    transform: translate(-50%, 8px);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-pill);
    background: var(--color-foreground);
    color: var(--color-background);
    font-size: var(--text-sm);
    font-weight: 500;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
    z-index: 200;
    white-space: nowrap;
}

.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- Demo panel (prototype only) ---------- */
.demo {
    position: fixed;
    right: 16px;
    bottom: 16px;
    width: 248px;
    z-index: 500;
    background: #111827;
    color: #F9FAFB;
    border: 1px solid #374151;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.demo summary {
    min-height: 44px;
    display: flex;
    align-items: center;
    padding: 0 var(--space-4);
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    border-radius: var(--radius-md);
}

.demo summary::-webkit-details-marker { display: none; }
.demo summary::after { content: "▴"; margin-left: auto; opacity: 0.6; }
.demo[open] summary::after { content: "▾"; }

.demo-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding: 0 var(--space-3) var(--space-3);
}

.demo-label {
    font-size: var(--text-xs);
    color: #9CA3AF;
    margin-top: var(--space-1);
}

.demo-seg {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-1);
}

.demo button {
    min-height: 36px;
    padding: 0 var(--space-3);
    border: 1px solid #374151;
    border-radius: var(--radius-sm);
    background: #1F2937;
    color: #F9FAFB;
    font-size: var(--text-sm);
    cursor: pointer;
}

.demo button:hover:not(:disabled) { background: #374151; }
.demo button[aria-pressed="true"] { background: #2563EB; border-color: #2563EB; }
.demo button:disabled { opacity: 0.4; cursor: not-allowed; }

.demo .check {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    min-height: 36px;
    cursor: pointer;
}

.demo .check input { width: 18px; height: 18px; accent-color: #2563EB; }
.demo .clock { font-variant-numeric: tabular-nums; color: #9CA3AF; font-size: var(--text-xs); }

@media (max-width: 720px) {
    .demo { left: 16px; right: 16px; width: auto; bottom: auto; top: 8px; opacity: 0.96; }
}

/* ---------- Motion ---------- */
@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes spin { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* No visible scrollbars (scrolling still works by touch, wheel and keyboard) */
html, body, .scroll, .sheet { scrollbar-width: none; -ms-overflow-style: none; }
html::-webkit-scrollbar, body::-webkit-scrollbar, .scroll::-webkit-scrollbar, .sheet::-webkit-scrollbar { display: none; }

/* Logo in the app's top bar */
.brand { display: inline-flex; align-items: center; min-height: 44px; }
.brand img { display: block; height: 26px; width: auto; }

/* Logo follows the theme: #1D4ED8 on light, #93C5FD on dark */
.logo-dark { display: none !important; }
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .logo-light { display: none !important; }
    :root:not([data-theme="light"]) .logo-dark { display: block !important; }
}
:root[data-theme="dark"] .logo-light { display: none !important; }
:root[data-theme="dark"] .logo-dark { display: block !important; }