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

:root {
    --primary-color: #DC2626;
    --primary-dark: #B91C1C;
    --primary-light: #EF4444;
    --secondary-color: #991B1B;
    --text-primary: #000000;
    --text-secondary: #4B5563;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --border-color: #E5E7EB;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-red: 0 10px 15px -3px rgba(220, 38, 38, 0.3), 0 4px 6px -2px rgba(220, 38, 38, 0.2);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, #16A34A 0%, #15803D 50%, #166534 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-primary);
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #16A34A 0%, #15803D 50%, #166534 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
    border-bottom: 3px solid rgba(0, 0, 0, 0.1);
}

.logo h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.tagline {
    font-size: 16px;
    opacity: 0.95;
    font-weight: 400;
}

main {
    padding: 40px 30px;
}

.hero-section {
    text-align: center;
    margin-bottom: 40px;
}

.app-icon {
    margin-bottom: 24px;
    display: flex;
    justify-content: center;
}

.app-icon svg {
    filter: drop-shadow(0 10px 20px rgba(220, 38, 38, 0.4));
}

.hero-section h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.description {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.download-section {
    text-align: center;
    margin-bottom: 50px;
    padding: 30px;
    background: var(--bg-secondary);
    border-radius: 16px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 22px 42px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    text-decoration: none;
    border-radius: 12px;
    font-size: 20px;
    font-weight: 700;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-red), 0 0 20px rgba(220, 38, 38, 0.4);
    margin-bottom: 12px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    position: relative;
    animation: pulse-glow 2s ease-in-out infinite, bounce 3s ease-in-out infinite;
    transform: scale(1.05);
}

.download-btn::before {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 12px;
    z-index: -1;
    opacity: 0.5;
    animation: pulse-ring 2s ease-in-out infinite;
}

.download-btn:hover {
    transform: translateY(-4px) scale(1.08);
    box-shadow: var(--shadow-lg), 0 0 35px rgba(220, 38, 38, 0.8);
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    border-color: rgba(255, 255, 255, 0.5);
    animation: none;
}

.download-btn:active {
    transform: translateY(-2px) scale(1.05);
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: var(--shadow-red), 0 0 20px rgba(220, 38, 38, 0.4), 0 0 40px rgba(220, 38, 38, 0.2);
    }
    50% {
        box-shadow: var(--shadow-red), 0 0 30px rgba(220, 38, 38, 0.7), 0 0 60px rgba(220, 38, 38, 0.4);
    }
}

@keyframes pulse-ring {
    0%, 100% {
        opacity: 0.5;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.08);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0) scale(1.05);
    }
    50% {
        transform: translateY(-10px) scale(1.05);
    }
}

.download-btn svg {
    width: 24px;
    height: 24px;
}

.file-info {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 8px;
}

.instructions-section {
    margin-bottom: 50px;
}

.instructions-section h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 30px;
    text-align: center;
}

.troubleshooting-note {
    background: #FEF2F2;
    border: 2px solid var(--primary-color);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
    text-align: center;
}

.troubleshooting-note p {
    color: var(--text-primary);
    font-size: 16px;
    margin: 0;
    line-height: 1.6;
}

.troubleshooting-note strong {
    color: var(--primary-color);
    font-weight: 600;
}

.happy-selling {
    text-align: center;
    margin-top: 40px;
    padding: 24px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 12px;
    color: white;
}

.happy-selling p {
    font-size: 20px;
    font-weight: 600;
    margin: 0;
    color: white;
    letter-spacing: 0.5px;
}

.instructions {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.instruction-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
    transition: transform 0.2s ease;
    border: 1px solid var(--border-color);
}

.instruction-item:hover {
    transform: translateX(4px);
}

.step-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    border: 2px solid rgba(0, 0, 0, 0.1);
}

.step-content h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.step-content p {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.6;
}

.guide-section {
    margin-bottom: 50px;
}

.guide-section h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    text-align: center;
}

.guide-intro {
    text-align: center;
    color: var(--text-secondary);
    font-size: 16px;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.accordion {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.accordion-item {
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all 0.3s ease;
}

.accordion-item:hover {
    box-shadow: var(--shadow);
}

.accordion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    cursor: pointer;
    background: var(--bg-secondary);
    border-left: 4px solid var(--primary-color);
    transition: background 0.3s ease;
}

.accordion-header:hover {
    background: rgba(220, 38, 38, 0.05);
}

.accordion-header h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    flex: 1;
}

.accordion-icon {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    transition: transform 0.3s ease;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(220, 38, 38, 0.1);
    border-radius: 50%;
}

.accordion-item.active .accordion-icon {
    transform: rotate(45deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0 24px;
}

.accordion-item.active .accordion-content {
    max-height: 5000px;
    padding: 24px;
}

.accordion-content h5 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 20px;
    margin-bottom: 12px;
}

.accordion-content h5:first-child {
    margin-top: 0;
}

.accordion-content p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 16px;
}

.accordion-content ul,
.accordion-content ol {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 16px;
    padding-left: 24px;
}

.accordion-content li {
    margin-bottom: 8px;
}

.accordion-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.accordion-content em {
    color: var(--text-secondary);
    font-style: italic;
}

.guide-note {
    background: #FEF2F2;
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
    padding: 16px;
    margin-top: 20px;
    margin-bottom: 16px;
}

.guide-note p {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 8px;
}

.guide-note ul {
    margin: 0;
    padding-left: 20px;
}

.guide-note li {
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.support-section {
    margin-bottom: 40px;
    text-align: center;
    padding: 40px 30px;
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 2px solid var(--primary-color);
}

.support-section h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.support-description {
    color: var(--text-secondary);
    font-size: 16px;
    margin-bottom: 30px;
}

.support-contact {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.support-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.call-btn {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow);
}

.call-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

.whatsapp-btn {
    background: #25D366;
    color: white;
    box-shadow: var(--shadow);
}

.whatsapp-btn:hover {
    background: #20BA5A;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

.support-btn svg {
    width: 20px;
    height: 20px;
}

.support-number {
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 700;
    margin-top: 16px;
    letter-spacing: 1px;
}

footer {
    background: #000000;
    color: white;
    padding: 30px;
    text-align: center;
    border-top: 3px solid var(--primary-color);
}

.footer-content p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    margin-bottom: 8px;
}

.contact-info {
    margin-top: 16px;
}

.contact-email {
    color: var(--primary-light);
    font-weight: 600;
    font-size: 16px;
}

/* Mobile Responsive Styles */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .container {
        border-radius: 16px;
    }

    header {
        padding: 30px 20px;
    }

    .logo h1 {
        font-size: 36px;
    }

    .tagline {
        font-size: 14px;
    }

    main {
        padding: 30px 20px;
    }

    .hero-section h2 {
        font-size: 24px;
    }

    .description {
        font-size: 16px;
    }

    .download-section {
        padding: 20px;
    }

    .download-btn {
        padding: 20px 32px;
        font-size: 18px;
        width: 100%;
        justify-content: center;
        transform: scale(1.02);
    }

    .download-btn:hover {
        transform: translateY(-3px) scale(1.05);
    }

    .instructions-section h3,
    .guide-section h3,
    .support-section h3 {
        font-size: 24px;
    }

    .accordion-header {
        padding: 16px 20px;
    }

    .accordion-header h4 {
        font-size: 16px;
    }

    .accordion-icon {
        width: 28px;
        height: 28px;
        font-size: 20px;
    }

    .accordion-item.active .accordion-content {
        padding: 20px;
    }

    .accordion-content h5 {
        font-size: 16px;
    }

    .accordion-content p,
    .accordion-content ul,
    .accordion-content ol {
        font-size: 14px;
    }

    .guide-note {
        padding: 14px;
    }

    .support-section {
        padding: 30px 20px;
    }

    .support-contact {
        flex-direction: column;
        align-items: stretch;
    }

    .support-btn {
        width: 100%;
        justify-content: center;
    }

    .instruction-item {
        padding: 20px;
        flex-direction: column;
        gap: 16px;
    }

    .step-number {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }

    .step-content h4 {
        font-size: 18px;
    }

    .step-content p {
        font-size: 14px;
    }

    .troubleshooting-note {
        padding: 16px;
        margin-bottom: 24px;
    }

    .troubleshooting-note p {
        font-size: 14px;
    }

    .happy-selling {
        margin-top: 30px;
        padding: 20px;
    }

    .happy-selling p {
        font-size: 18px;
    }

    footer {
        padding: 24px 20px;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 32px;
    }

    .hero-section h2 {
        font-size: 22px;
    }

    .download-btn {
        padding: 18px 28px;
        font-size: 17px;
        transform: scale(1);
    }

    .download-btn:hover {
        transform: translateY(-2px) scale(1.03);
    }

    .instructions-section h3,
    .guide-section h3,
    .support-section h3 {
        font-size: 22px;
    }

    .accordion-header h4 {
        font-size: 15px;
    }

    .happy-selling p {
        font-size: 16px;
    }
}

/* Animation for page load */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-section,
.download-section,
.instructions-section,
.guide-section,
.support-section {
    animation: fadeIn 0.6s ease-out;
}