/* ===== Professional, Accessible Color System ===== */
:root {
    /* Light theme (default) */
    --surface-1: #ffffff; /* card */
    --surface-2: #f8fafc; /* page bg */
    --text-1: #0f172a; /* primary text */
    --text-2: #475569; /* secondary text */
    --border: #e5e7eb; /* hairlines */
    --shadow: 0 12px 32px rgba(2, 6, 23, .10);
    /* Brand accents */
    --primary-600: #2563eb; /* blue */
    --primary-700: #1d4ed8;
    --success-600: #16a34a; /* green */
    --success-100: #ecfdf5;
    --danger-600: #dc2626; /* red   */
    --danger-100: #fee2e2;
    /* Gradients */
    --header-grad: linear-gradient(90deg, #2563eb 0%, #22c55e 100%);
    --bar-grad: linear-gradient(90deg, #2563eb, #22c55e);
    /* Components */
    --pill-connected-bg: color-mix(in srgb, var(--success-600) 14%, transparent);
    --pill-connected-bd: color-mix(in srgb, var(--success-600) 45%, transparent);
    --pill-connected-fg: #065f46;
    --pill-disconnected-bg: color-mix(in srgb, var(--danger-600) 14%, transparent);
    --pill-disconnected-bd: color-mix(in srgb, var(--danger-600) 45%, transparent);
    --pill-disconnected-fg: #7f1d1d;
}

/* Dark theme */
@media (prefers-color-scheme: dark) {
    :root {
        --surface-1: #0f172a;
        --surface-2: #0b1220;
        --text-1: #e5e7eb;
        --text-2: #94a3b8;
        --border: rgba(255,255,255,.08);
        --shadow: 0 14px 36px rgba(0,0,0,.45);
        --primary-600: #60a5fa;
        --primary-700: #3b82f6;
        --success-600: #34d399;
        --success-100: #06281c;
        --danger-600: #f87171;
        --danger-100: #2a0b0b;
        --header-grad: linear-gradient(90deg, #3b82f6 0%, #34d399 100%);
        --bar-grad: linear-gradient(90deg, #3b82f6, #34d399);
        --pill-connected-bg: color-mix(in srgb, var(--success-600) 22%, transparent);
        --pill-connected-bd: color-mix(in srgb, var(--success-600) 55%, transparent);
        --pill-connected-fg: #d1fae5;
        --pill-disconnected-bg: color-mix(in srgb, var(--danger-600) 22%, transparent);
        --pill-disconnected-bd: color-mix(in srgb, var(--danger-600) 55%, transparent);
        --pill-disconnected-fg: #fee2e2;
    }
}

/* ===== Layout ===== */
* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
    color: var(--text-1);
    background: var(--surface-2);
    font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

.wa-wrap {
    min-height: 100dvh;
    display: grid;
    place-items: center;
    padding: 16px;
}

/* Card */
.wa-card {
    width: 100%;
    max-width: 420px;
    background: var(--surface-1);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

/* Header */
.wa-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: var(--header-grad);
    color: #fff;
}

.wa-title {
    display: flex;
    align-items: center;
    gap: 10px;
}

    .wa-title h1 {
        font-size: 18px;
        margin: 0;
        font-weight: 800;
        letter-spacing: .2px;
    }

.wa-icon {
    width: 18px;
    height: 18px;
    fill: #fff;
    opacity: .9;
}

/* Status pill */
.wa-pill {
    font-weight: 800;
    font-size: 12px;
    padding: 6px 10px;
    border-radius: 999px;
    letter-spacing: .3px;
    backdrop-filter: blur(6px);
}

.wa-pill--connected {
    background: var(--pill-connected-bg);
    border: 1px solid var(--pill-connected-bd);
    color: var(--pill-connected-fg);
}

.wa-pill--disconnected {
    background: var(--pill-disconnected-bg);
    border: 1px solid var(--pill-disconnected-bd);
    color: var(--pill-disconnected-fg);
}

/* Body */
.wa-body {
    padding: 16px;
}

/* QR Area */
.wa-qrwrap {
    width: clamp(200px, 64vw, 260px);
    height: clamp(200px, 64vw, 260px);
    margin: 8px auto 14px;
    border: 1px dashed var(--border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(120% 100% at 50% 0%, color-mix(in srgb, var(--primary-600) 8%, transparent), transparent 60%), radial-gradient(120% 100% at 50% 100%, color-mix(in srgb, var(--success-600) 8%, transparent), transparent 60%), linear-gradient(180deg, color-mix(in srgb, var(--surface-1) 96%, transparent), transparent);
}

.wa-qr-placeholder {
    color: var(--text-2);
    font-size: 13px;
}

/* CTA */
.wa-cta {
    text-align: center;
}

.wa-btn {
    appearance: none;
    border: 1px solid var(--primary-600);
    background: var(--primary-600);
    color: #fff;
    font-weight: 800;
    letter-spacing: .2px;
    padding: 10px 14px;
    border-radius: 10px;
    cursor: pointer;
    min-width: 220px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background .15s ease, transform .05s ease, box-shadow .2s ease, border-color .15s ease;
    box-shadow: 0 6px 18px color-mix(in srgb, var(--primary-600) 30%, transparent);
}

    .wa-btn:hover {
        background: var(--primary-700);
        border-color: var(--primary-700);
    }

    .wa-btn:active {
        transform: translateY(1px);
    }

    .wa-btn:focus-visible {
        outline: none;
        box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-600) 30%, transparent);
    }

    .wa-btn[disabled] {
        opacity: .55;
        cursor: not-allowed;
        box-shadow: none;
    }

.btn-spin {
    display: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,.55);
    border-top-color: #fff;
    animation: spin .7s linear infinite;
}

.wa-btn.busy .btn-spin {
    display: inline-block;
}

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

.wa-hint {
    margin-top: 8px;
    color: var(--text-2);
    font-size: 12px;
}

    .wa-hint em {
        font-style: normal;
        font-weight: 700;
        color: var(--text-1);
    }

/* Expiry / Progress */
.wa-expiry {
    margin-top: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    justify-content: center;
}

.wa-timer {
    font-weight: 900;
    min-width: 2ch;
}

.wa-progress {
    width: 160px;
    height: 6px;
    background: color-mix(in srgb, var(--border) 70%, transparent);
    border-radius: 999px;
    overflow: hidden;
}

.wa-progress-bar {
    height: 100%;
    width: 0%;
    background: var(--bar-grad);
    transition: width .3s ease;
}

/* Responsive */
@media (max-width: 480px) {
    .wa-card {
        border-radius: 12px;
    }

    .wa-btn {
        width: 100%;
        min-width: unset;
    }

    .wa-hint {
        font-size: 12px;
    }
}