/* ===== OVERLAY ===== */
        .bf-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.78);
            -webkit-backdrop-filter: blur(6px);
            backdrop-filter: blur(6px);
            z-index: 9998;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.5s ease, visibility 0.5s ease;
        }

        .bf-overlay.active {
            opacity: 1;
            visibility: visible;
        }

        /* ===== CONTAINER ===== */
        .bf-banner-container {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%) scale(0.7);
            z-index: 9999;
            width: min(92vw, 720px);
            max-height: 94vh;
            max-height: 94dvh;
            opacity: 0;
            visibility: hidden;
            transition: all 0.6s cubic-bezier(0.68, -0.55, 0.27, 1.55);
            /* Safe area para iPhones com notch */
            padding:
                max(12px, env(safe-area-inset-top))
                max(12px, env(safe-area-inset-right))
                max(12px, env(safe-area-inset-bottom))
                max(12px, env(safe-area-inset-left));
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .bf-banner-container.active {
            opacity: 1;
            visibility: visible;
            transform: translate(-50%, -50%) scale(1);
        }

        /* ===== BANNER ===== */
        .bf-banner {
            position: relative;
            width: 100%;
            background: linear-gradient(135deg, #1a1a1a 0%, #2d0000 50%, #1a1a1a 100%);
            border-radius: var(--bf-radius);
            padding: var(--bf-padding-y) var(--bf-padding-x) calc(var(--bf-padding-y) * 0.85);
            overflow: hidden;
            box-shadow:
                0 0 clamp(40px, 5vw, 80px) rgba(255, 0, 0, 0.5),
                0 0 clamp(80px, 10vw, 160px) rgba(255, 0, 0, 0.2),
                0 25px 50px rgba(0, 0, 0, 0.8);
            border: 2px solid rgba(255, 50, 50, 0.4);
            animation: glowPulse 2s ease-in-out infinite alternate;
        }

        @keyframes glowPulse {
            from {
                box-shadow:
                    0 0 clamp(40px, 5vw, 80px) rgba(255, 0, 0, 0.5),
                    0 0 clamp(80px, 10vw, 160px) rgba(255, 0, 0, 0.2),
                    0 25px 50px rgba(0, 0, 0, 0.8);
            }
            to {
                box-shadow:
                    0 0 clamp(60px, 7vw, 110px) rgba(255, 0, 0, 0.8),
                    0 0 clamp(120px, 14vw, 200px) rgba(255, 0, 0, 0.35),
                    0 25px 50px rgba(0, 0, 0, 0.8);
            }
        }

        .bf-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: conic-gradient(
                from 0deg,
                transparent 0deg,
                rgba(255, 0, 0, 0.15) 60deg,
                transparent 120deg,
                rgba(255, 100, 0, 0.1) 180deg,
                transparent 240deg,
                rgba(255, 0, 0, 0.15) 300deg,
                transparent 360deg
            );
            animation: rotateBg 8s linear infinite;
            z-index: 0;
        }

        @keyframes rotateBg {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }

        /* ===== PARTÍCULAS ===== */
        .bf-particle {
            position: absolute;
            width: clamp(3px, 0.3vw, 6px);
            height: clamp(3px, 0.3vw, 6px);
            background: #ff3c3c;
            border-radius: 50%;
            opacity: 0.6;
            animation: floatParticle linear infinite;
            z-index: 1;
            pointer-events: none;
        }

        @keyframes floatParticle {
            0%   { transform: translateY(100%) scale(1); opacity: 0; }
            10%  { opacity: 0.8; }
            90%  { opacity: 0.8; }
            100% { transform: translateY(-100vh) scale(0.3); opacity: 0; }
        }

        /* ===== CONTEÚDO ===== */
        .bf-content {
            position: relative;
            z-index: 2;
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        /* ===== BADGE ===== */
        .bf-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5em;
            background: linear-gradient(90deg, #ff0000, #ff4d00);
            color: #fff;
            font-size: clamp(0.6rem, 0.55rem + 0.35vw, 0.95rem);
            font-weight: 900;
            letter-spacing: clamp(1.5px, 0.2vw, 4px);
            padding: clamp(6px, 0.6vh, 10px) clamp(16px, 2vw, 28px);
            border-radius: 50px;
            margin-bottom: clamp(12px, 1.8vh, 22px);
            text-transform: uppercase;
            white-space: nowrap;
            animation: badgePulse 1.5s ease-in-out infinite;
            box-shadow: 0 0 20px rgba(255, 50, 0, 0.6);
        }

        @keyframes badgePulse {
            0%, 100% { transform: scale(1); box-shadow: 0 0 20px rgba(255, 50, 0, 0.6); }
            50%      { transform: scale(1.05); box-shadow: 0 0 35px rgba(255, 50, 0, 0.9); }
        }

        /* ===== TÍTULO ===== */
        .bf-title {
            font-size: clamp(1.75rem, 1rem + 3.5vw, 4.5rem);
            font-weight: 900;
            line-height: 1.05;
            margin-bottom: clamp(10px, 1.5vh, 18px);
            text-transform: uppercase;
            color: #fff;
            text-shadow:
                0 0 20px rgba(255, 0, 0, 0.8),
                0 0 40px rgba(255, 0, 0, 0.4);
            letter-spacing: -1px;
            word-wrap: break-word;
            overflow-wrap: break-word;
        }

        .bf-title .highlight {
            display: block;
            background: linear-gradient(135deg, #ff0000, #ff6600, #ffcc00);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-size: clamp(2.2rem, 1.2rem + 4.5vw, 6rem);
            filter: drop-shadow(0 0 25px rgba(255, 100, 0, 0.6));
            animation: textGlow 2s ease-in-out infinite alternate;
            line-height: 1;
        }

        @keyframes textGlow {
            from { filter: drop-shadow(0 0 25px rgba(255, 100, 0, 0.6)); }
            to   { filter: drop-shadow(0 0 45px rgba(255, 60, 0, 0.95)); }
        }

        /* ===== SUBTÍTULO ===== */
        .bf-subtitle {
            font-size: clamp(0.8rem, 0.7rem + 0.55vw, 1.25rem);
            color: #e0e0e0;
            margin-bottom: clamp(18px, 2.4vh, 32px);
            font-weight: 400;
            letter-spacing: 0.5px;
            line-height: 1.45;
            max-width: 60ch;
        }

        .bf-subtitle strong {
            color: #ff4d4d;
            font-weight: 700;
        }

        /* ===== CONTADOR ===== */
        .bf-countdown {
            display: flex;
            justify-content: center;
            gap: clamp(6px, 0.9vw, 16px);
            margin-bottom: clamp(20px, 2.8vh, 34px);
            flex-wrap: wrap;
        }

        .bf-countdown-item {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 50, 50, 0.3);
            border-radius: clamp(8px, 0.8vw, 16px);
            padding: clamp(8px, 1vh, 16px) clamp(10px, 1.2vw, 22px);
            min-width: clamp(56px, 6vw, 96px);
            -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
        }

        .bf-countdown-value {
            font-size: clamp(1.25rem, 1rem + 1.3vw, 2.4rem);
            font-weight: 900;
            color: #fff;
            display: block;
            line-height: 1;
            text-shadow: 0 0 15px rgba(255, 50, 50, 0.7);
            font-variant-numeric: tabular-nums;
        }

        .bf-countdown-label {
            font-size: clamp(0.55rem, 0.45rem + 0.25vw, 0.75rem);
            text-transform: uppercase;
            letter-spacing: clamp(1px, 0.15vw, 2.5px);
            color: #ff9999;
            margin-top: 6px;
            display: block;
            font-weight: 700;
        }

        /* ===== BOTÃO WHATSAPP ===== */
        .bf-btn-whatsapp {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: clamp(8px, 0.8vw, 14px);
            background: linear-gradient(135deg, #25D366, #128C7E);
            color: #fff !important;
            font-weight: 900;
            font-size: clamp(0.85rem, 0.75rem + 0.6vw, 1.25rem);
            text-transform: uppercase;
            letter-spacing: clamp(1px, 0.15vw, 2px);
            padding: clamp(12px, 1.6vh, 20px) clamp(24px, 3vw, 48px);
            border: none;
            border-radius: 60px;
            text-decoration: none;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow:
                0 8px 25px rgba(37, 211, 102, 0.4),
                0 0 40px rgba(37, 211, 102, 0.2);
            position: relative;
            overflow: hidden;
            animation: btnPulse 2s ease-in-out infinite;
            max-width: 100%;
            min-height: 48px;
            -webkit-tap-highlight-color: transparent;
        }

        @keyframes btnPulse {
            0%, 100% { transform: scale(1); }
            50%      { transform: scale(1.03); }
        }

        .bf-btn-whatsapp::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
            transition: left 0.6s ease;
        }

        .bf-btn-whatsapp:hover::before {
            left: 100%;
        }

        .bf-btn-whatsapp:hover {
            transform: scale(1.08) translateY(-3px);
            box-shadow:
                0 12px 35px rgba(37, 211, 102, 0.6),
                0 0 60px rgba(37, 211, 102, 0.4);
            animation: none;
        }

        .bf-btn-whatsapp:focus-visible {
            outline: 3px solid #fff;
            outline-offset: 3px;
        }

        .bf-btn-whatsapp i {
            font-size: clamp(1.1rem, 1rem + 0.7vw, 1.75rem);
            animation: whatsappShake 1s ease-in-out infinite;
            flex-shrink: 0;
        }

        @keyframes whatsappShake {
            0%, 100% { transform: rotate(0deg); }
            25%      { transform: rotate(15deg); }
            75%      { transform: rotate(-15deg); }
        }

        /* ===== BOTÃO FECHAR ===== */
        .bf-close {
            position: absolute;
            top: clamp(10px, 1.2vw, 20px);
            right: clamp(10px, 1.2vw, 20px);
            width: clamp(34px, 3vw, 52px);
            height: clamp(34px, 3vw, 52px);
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-size: clamp(0.85rem, 0.75rem + 0.4vw, 1.4rem);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
            z-index: 10;
            -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
            -webkit-tap-highlight-color: transparent;
        }

        .bf-close:hover,
        .bf-close:focus-visible {
            background: #ff0000;
            border-color: #ff0000;
            transform: rotate(90deg) scale(1.1);
            box-shadow: 0 0 25px rgba(255, 0, 0, 0.7);
            outline: none;
        }

        /* ===== BARRA DE PROGRESSO ===== */
        .bf-progress {
            position: absolute;
            bottom: 0;
            left: 0;
            height: clamp(3px, 0.35vh, 6px);
            width: 100%;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 0 0 var(--bf-radius) var(--bf-radius);
            overflow: hidden;
            z-index: 5;
        }

        .bf-progress-bar {
            height: 100%;
            width: 100%;
            background: linear-gradient(90deg, #ff0000, #ff6600, #ffcc00);
            border-radius: 0 0 var(--bf-radius) var(--bf-radius);
            transition: width 30s linear;
            box-shadow: 0 0 15px rgba(255, 100, 0, 0.8);
        }

        /* =====================================================
           ANIMAÇÕES INTERNAS (cascata)
           ===================================================== */
        .bf-banner-container.active .bf-badge {
            animation: slideDown 0.5s ease 0.2s both, badgePulse 1.5s ease-in-out 0.7s infinite;
        }

        .bf-banner-container.active .bf-title {
            animation: slideUp 0.6s ease 0.3s both;
        }

        .bf-banner-container.active .bf-subtitle {
            animation: slideUp 0.6s ease 0.45s both;
        }

        .bf-banner-container.active .bf-countdown {
            animation: slideUp 0.6s ease 0.55s both;
        }

        .bf-banner-container.active .bf-btn-whatsapp {
            animation: slideUp 0.6s ease 0.65s both, btnPulse 2s ease-in-out 1.2s infinite;
        }

        @keyframes slideDown {
            from { opacity: 0; transform: translateY(-20px); }
            to   { opacity: 1; transform: translateY(0); }
        }

        @keyframes slideUp {
            from { opacity: 0; transform: translateY(25px); }
            to   { opacity: 1; transform: translateY(0); }
        }

        /* =====================================================
           RESPONSIVIDADE PARA TVS (4K / 8K / Full HD)
           ===================================================== */
        @media (min-width: 1920px) {
            :root {
                --bf-radius: 36px;
                --bf-padding-y: 80px;
                --bf-padding-x: 80px;
            }

            .bf-banner-container {
                width: min(75vw, 1400px);
                max-width: 1400px;
            }

            .bf-title {
                font-size: 5rem;
                letter-spacing: -1.5px;
            }

            .bf-title .highlight {
                font-size: 7rem;
            }

            .bf-subtitle {
                font-size: 1.6rem;
                max-width: 75ch;
                line-height: 1.5;
            }

            .bf-badge {
                font-size: 1.15rem;
                padding: 12px 40px;
                letter-spacing: 5px;
            }

            .bf-countdown {
                gap: 26px;
            }

            .bf-countdown-item {
                min-width: 130px;
                padding: 22px 32px;
                border-radius: 22px;
            }

            .bf-countdown-value {
                font-size: 3.4rem;
            }

            .bf-countdown-label {
                font-size: 1rem;
                letter-spacing: 3px;
            }

            .bf-btn-whatsapp {
                font-size: 1.6rem;
                padding: 26px 64px;
                gap: 18px;
                min-height: 80px;
            }

            .bf-btn-whatsapp i {
                font-size: 2.2rem;
            }

            .bf-close {
                width: 60px;
                height: 60px;
                top: 24px;
                right: 24px;
                font-size: 1.6rem;
            }
        }

        /* TV 4K e 8K */
        @media (min-width: 2560px) {
            .bf-banner-container {
                width: min(70vw, 2000px);
                max-width: 2000px;
            }

            .bf-title {
                font-size: 6.5rem;
            }

            .bf-title .highlight {
                font-size: 9rem;
            }

            .bf-subtitle {
                font-size: 2rem;
            }

            .bf-countdown-value {
                font-size: 4.4rem;
            }

            .bf-countdown-item {
                min-width: 170px;
                padding: 28px 40px;
            }

            .bf-btn-whatsapp {
                font-size: 2rem;
                padding: 32px 88px;
            }

            .bf-btn-whatsapp i {
                font-size: 2.8rem;
            }

            .bf-badge {
                font-size: 1.4rem;
            }

            .bf-close {
                width: 72px;
                height: 72px;
                font-size: 2rem;
            }
        }

        /* =====================================================
           NOTEBOOKS (1280px - 1920px)
           ===================================================== */
        @media (min-width: 1200px) and (max-width: 1919px) {
            .bf-banner-container {
                width: min(60vw, 900px);
            }

            .bf-title .highlight {
                font-size: clamp(3rem, 4vw, 5rem);
            }
        }

        /* Notebooks pequenos / tablets grandes em paisagem */
        @media (min-width: 992px) and (max-width: 1199px) {
            .bf-banner-container {
                width: min(80vw, 850px);
            }
        }

        /* =====================================================
           TABLETS (768px - 991px)
           ===================================================== */
        @media (min-width: 768px) and (max-width: 991px) {
            .bf-banner-container {
                width: 90vw;
                max-width: 720px;
            }

            .bf-banner {
                padding: 42px 32px 38px;
            }

            .bf-title .highlight {
                font-size: clamp(2.8rem, 5.5vw, 4rem);
            }

            .bf-btn-whatsapp {
                padding: 16px 36px;
                min-height: 54px;
            }
        }

        /* =====================================================
           CELULARES (até 767px)
           ===================================================== */
        @media (max-width: 767px) {
            .bf-banner-container {
                width: 94vw;
                max-height: 92vh;
                max-height: 92dvh;
            }

            .bf-banner {
                padding: 40px 20px 36px;
                border-radius: 20px;
            }

            .bf-title {
                font-size: clamp(1.6rem, 5.5vw, 2.4rem);
                line-height: 1.1;
            }

            .bf-title .highlight {
                font-size: clamp(2.2rem, 8vw, 3.4rem);
            }

            .bf-subtitle {
                font-size: clamp(0.78rem, 3vw, 1rem);
                line-height: 1.5;
            }

            .bf-subtitle br {
                display: none;
            }

            .bf-countdown {
                gap: 8px;
            }

            .bf-countdown-item {
                min-width: 58px;
                padding: 10px 8px;
                border-radius: 10px;
                flex: 1;
                max-width: 82px;
            }

            .bf-countdown-value {
                font-size: clamp(1.2rem, 5vw, 1.6rem);
            }

            .bf-countdown-label {
                font-size: 0.55rem;
                letter-spacing: 1px;
            }

            .bf-btn-whatsapp {
                width: 100%;
                padding: 16px 20px;
                font-size: clamp(0.85rem, 3.6vw, 1rem);
                min-height: 52px;
                gap: 10px;
            }

            .bf-btn-whatsapp i {
                font-size: 1.4rem;
            }

            .bf-badge {
                font-size: 0.65rem;
                padding: 7px 16px;
                letter-spacing: 2px;
            }

            .bf-close {
                width: 38px;
                height: 38px;
                top: 10px;
                right: 10px;
                font-size: 1rem;
            }
        }

        /* Celulares muito pequenos (≤360px) */
        @media (max-width: 360px) {
            .bf-banner {
                padding: 36px 14px 32px;
                border-radius: 16px;
            }

            .bf-badge {
                font-size: 0.55rem;
                letter-spacing: 1.5px;
                padding: 6px 12px;
            }

            .bf-title {
                font-size: 1.4rem;
            }

            .bf-title .highlight {
                font-size: 2rem;
            }

            .bf-subtitle {
                font-size: 0.72rem;
                margin-bottom: 16px;
            }

            .bf-countdown-item {
                min-width: 48px;
                padding: 8px 4px;
            }

            .bf-countdown-value {
                font-size: 1.1rem;
            }

            .bf-countdown-label {
                font-size: 0.5rem;
            }

            .bf-btn-whatsapp {
                font-size: 0.78rem;
                padding: 14px 14px;
                letter-spacing: 0.5px;
            }

            .bf-close {
                width: 34px;
                height: 34px;
                font-size: 0.9rem;
            }
        }

        /* =====================================================
           ORIENTAÇÃO PAISAGEM (crucial para TVs, notebooks
           baixos e celulares deitados)
           ===================================================== */
        @media (orientation: landscape) and (max-height: 600px) {
            .bf-banner-container {
                max-height: 96dvh;
                width: 95vw;
                max-width: 900px;
            }

            .bf-banner {
                padding: 22px 32px 22px;
                border-radius: 18px;
            }

            .bf-badge {
                font-size: 0.65rem;
                padding: 5px 14px;
                margin-bottom: 8px;
            }

            .bf-title {
                font-size: clamp(1.3rem, 3vw, 2rem);
                margin-bottom: 6px;
            }

            .bf-title .highlight {
                font-size: clamp(1.8rem, 4.5vw, 2.8rem);
                display: inline-block;
                margin-left: 0.25em;
            }

            .bf-subtitle {
                font-size: 0.78rem;
                margin-bottom: 12px;
                line-height: 1.35;
            }

            .bf-subtitle br {
                display: none;
            }

            .bf-countdown {
                margin-bottom: 14px;
                gap: 8px;
            }

            .bf-countdown-item {
                min-width: 56px;
                padding: 8px 10px;
                border-radius: 8px;
            }

            .bf-countdown-value {
                font-size: 1.35rem;
            }

            .bf-countdown-label {
                font-size: 0.55rem;
                margin-top: 3px;
            }

            .bf-btn-whatsapp {
                padding: 12px 28px;
                min-height: 44px;
                font-size: 0.88rem;
            }

            .bf-btn-whatsapp i {
                font-size: 1.2rem;
            }

            .bf-close {
                width: 34px;
                height: 34px;
                top: 8px;
                right: 8px;
                font-size: 0.9rem;
            }
        }

        /* Paisagem EXTREMAMENTE baixa (ex: TVs panorâmicas) */
        @media (orientation: landscape) and (max-height: 420px) {
            .bf-banner {
                padding: 16px 24px 16px;
            }

            .bf-badge {
                margin-bottom: 6px;
                font-size: 0.55rem;
            }

            .bf-title {
                font-size: 1.2rem;
            }

            .bf-title .highlight {
                font-size: 1.7rem;
            }

            .bf-subtitle {
                font-size: 0.7rem;
                margin-bottom: 8px;
            }

            .bf-countdown {
                margin-bottom: 10px;
            }

            .bf-countdown-item {
                padding: 6px 8px;
                min-width: 48px;
            }

            .bf-countdown-value {
                font-size: 1.1rem;
            }

            .bf-btn-whatsapp {
                padding: 10px 24px;
                font-size: 0.8rem;
                min-height: 40px;
            }
        }

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

        @media (prefers-contrast: high) {
            .bf-banner {
                border: 3px solid #fff;
            }

            .bf-btn-whatsapp {
                border: 2px solid #fff;
            }

            .bf-close {
                border: 2px solid #fff;
                background: rgba(0, 0, 0, 0.8);
            }
        }

        /* Fallback para navegadores sem backdrop-filter */
        @supports not (backdrop-filter: blur(6px)) {
            .bf-overlay {
                background: rgba(0, 0, 0, 0.92);
            }

            .bf-countdown-item {
                background: rgba(255, 255, 255, 0.15);
            }
        }

        /* Modo escuro da interface do sistema (já é escuro por padrão) */
        @media (prefers-color-scheme: light) {
            .bf-overlay {
                background: rgba(0, 0, 0, 0.85);
            }
        }