/**
 * GiftCodeNgon — PWA Install Popup
 *
 * @version 1.0.0
 */

/* ── Overlay ─────────────────────────────────────────────────── */
.gcn-pwa-popup-overlay {
    position: fixed;
    inset: 0;
    z-index: 99990;
    display: flex;
    align-items: flex-end;          /* slide up từ dưới */
    justify-content: center;
    padding: 0 0 env(safe-area-inset-bottom, 0);
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);

    /* hidden state */
    opacity: 0;
    pointer-events: none;
    transition: opacity 280ms ease;
}

.gcn-pwa-popup-overlay.is-visible {
    opacity: 1;
    pointer-events: auto;
}

/* ── Popup card ──────────────────────────────────────────────── */
.gcn-pwa-popup {
    position: relative;
    width: 100%;
    max-width: 420px;
    margin: 0 12px 12px;
    padding: 28px 24px 24px;
    background: var(--color-card, #1e293b);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-2xl, 24px);
    box-shadow:
        0 -4px 40px rgba(0, 0, 0, 0.45),
        0 0 0 1px rgba(255, 255, 255, 0.04) inset;
    display: grid;
    gap: var(--space-4, 16px);
    text-align: center;

    /* slide-up entrance */
    transform: translateY(32px);
    transition: transform 320ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.gcn-pwa-popup-overlay.is-visible .gcn-pwa-popup {
    transform: translateY(0);
}

/* ── Close button (X) ────────────────────────────────────────── */
.gcn-pwa-popup-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 30px;
    height: 30px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    color: var(--color-text-muted, #64748b);
    font-size: 15px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast, 150ms ease),
                color var(--transition-fast, 150ms ease);
    line-height: 1;
}

.gcn-pwa-popup-close:hover {
    background: rgba(255, 255, 255, 0.16);
    color: var(--color-text-primary, #f8fafc);
}

/* ── App icon ────────────────────────────────────────────────── */
.gcn-pwa-popup-icon {
    display: flex;
    justify-content: center;
}

.gcn-pwa-popup-icon img {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-xl, 16px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}

/* ── Body text ───────────────────────────────────────────────── */
.gcn-pwa-popup-title {
    margin: 0 0 6px;
    font-size: var(--text-lg, 1.125rem);
    font-weight: var(--font-bold, 700);
    color: var(--color-text-primary, #f8fafc);
    line-height: var(--leading-tight, 1.25);
}

.gcn-pwa-popup-desc {
    margin: 0;
    font-size: var(--text-sm, 0.875rem);
    color: var(--color-text-secondary, #94a3b8);
    line-height: var(--leading-relaxed, 1.625);
}

/* ── Countdown SVG ring ──────────────────────────────────────── */
.gcn-pwa-popup-countdown {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    width: 52px;
    height: 52px;
    margin: 0 auto;
}

.gcn-pwa-countdown-svg {
    width: 52px;
    height: 52px;
    transform: rotate(-90deg);   /* start từ đỉnh */
}

.gcn-pwa-countdown-track {
    fill: none;
    stroke: rgba(99, 102, 241, 0.18);
    stroke-width: 3;
}

.gcn-pwa-countdown-ring {
    fill: none;
    stroke: var(--color-primary, #6366f1);
    stroke-width: 3;
    stroke-linecap: round;

    /* circumference = 2πr = 2 × π × 18 ≈ 113.1 */
    --cd-circ: 113.1;
    stroke-dasharray: var(--cd-circ);
    stroke-dashoffset: 0;

    /* animation chạy từ 0 → full circumference trong N giây */
    animation: gcnCdShrink calc(var(--gcn-cd-total, 10) * 1s) linear forwards;
}

@keyframes gcnCdShrink {
    from { stroke-dashoffset: 0; }
    to   { stroke-dashoffset: var(--cd-circ); }
}

/* Paused khi popup chưa visible */
.gcn-pwa-popup-overlay:not(.is-visible) .gcn-pwa-countdown-ring {
    animation-play-state: paused;
}

.gcn-pwa-countdown-num {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-sm, 0.875rem);
    font-weight: var(--font-bold, 700);
    color: var(--color-primary, #6366f1);
    font-variant-numeric: tabular-nums;
}

/* ── Action buttons ──────────────────────────────────────────── */
.gcn-pwa-popup-actions {
    display: grid;
    gap: var(--space-2, 8px);
}

/* Install button */
.gcn-pwa-popup-btn-install {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 12px 20px;
    border: none;
    border-radius: var(--radius-lg, 12px);
    background: linear-gradient(135deg, var(--color-primary, #6366f1), var(--color-primary-hover, #4f46e5));
    color: #fff;
    font-size: var(--text-sm, 0.875rem);
    font-weight: var(--font-semibold, 600);
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.38);
    transition: transform var(--transition-fast, 150ms ease),
                box-shadow var(--transition-fast, 150ms ease),
                opacity var(--transition-fast, 150ms ease);
}

.gcn-pwa-popup-btn-install:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 22px rgba(99, 102, 241, 0.52);
}

.gcn-pwa-popup-btn-install:active {
    transform: translateY(0);
}

.gcn-pwa-popup-btn-install.is-loading {
    opacity: 0.7;
    pointer-events: none;
}

.gcn-pwa-popup-btn-install.is-installed {
    background: linear-gradient(135deg, #16a34a, #15803d);
    box-shadow: 0 4px 16px rgba(22, 163, 74, 0.38);
}

/* Dismiss button */
.gcn-pwa-popup-btn-dismiss {
    display: block;
    width: 100%;
    padding: 9px 20px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg, 12px);
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-muted, #64748b);
    font-size: var(--text-sm, 0.875rem);
    font-weight: var(--font-medium, 500);
    cursor: pointer;
    transition: background var(--transition-fast, 150ms ease),
                color var(--transition-fast, 150ms ease);
}

.gcn-pwa-popup-btn-dismiss:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-secondary, #94a3b8);
}

/* ── Closing animation ───────────────────────────────────────── */
.gcn-pwa-popup-overlay.is-closing {
    opacity: 0;
}

.gcn-pwa-popup-overlay.is-closing .gcn-pwa-popup {
    transform: translateY(24px);
}

/* ── Desktop: center popup thay vì bottom sheet ─────────────── */
@media (min-width: 640px) {
    .gcn-pwa-popup-overlay {
        align-items: center;
        padding: 16px;
    }

    .gcn-pwa-popup {
        margin: 0;
        padding: 32px 28px 28px;
    }

    .gcn-pwa-popup-overlay.is-closing .gcn-pwa-popup {
        transform: translateY(12px) scale(0.96);
    }
}

/* ── Reduce motion ───────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    .gcn-pwa-popup-overlay,
    .gcn-pwa-popup {
        transition: none;
    }

    .gcn-pwa-countdown-ring {
        animation: none;
    }
}