:root {
    /* Teal Color Palette */
    --teal: #14b8a6;
    --teal-dark: #0d9488;
    --teal-light: #5eead4;
    --cyan: #06b6d4;
    --mint: #10b981;
    
    /* Light Mode Colors */
    --bg-top-light: #f2f7f9;
    --bg-bottom-light: #ffffff;
    --card-bg-light: rgba(255, 255, 255, 0.95);
    --text-primary-light: #000000;
    --text-secondary-light: rgba(0, 0, 0, 0.7);
    --border-light: rgba(20, 184, 166, 0.25);
    
    /* Dark Mode Colors */
    --bg-top-dark: #000000;
    --bg-bottom-dark: #000000;
    --card-bg-dark: rgba(255, 255, 255, 0.06);
    --text-primary-dark: #ffffff;
    --text-secondary-dark: rgba(255, 255, 255, 0.8);
    --border-dark: rgba(20, 184, 166, 0.35);
    
    /* Current Theme (defaults to light) */
    --bg-top: var(--bg-top-light);
    --bg-bottom: var(--bg-bottom-light);
    --card-bg: var(--card-bg-light);
    --text-primary: var(--text-primary-light);
    --text-secondary: var(--text-secondary-light);
    --border: var(--border-light);
}

[data-theme="dark"] {
    --bg-top: var(--bg-top-dark);
    --bg-bottom: var(--bg-bottom-dark);
    --card-bg: var(--card-bg-dark);
    --text-primary: var(--text-primary-dark);
    --text-secondary: var(--text-secondary-dark);
    --border: var(--border-dark);
}

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

html {
    background: var(--bg-top);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background: linear-gradient(to bottom, var(--bg-top), var(--bg-bottom));
    color: var(--text-primary);
    min-height: 100vh;
    transition: background 0.3s ease, color 0.3s ease;
    line-height: 1.6;
    padding-top: 80px;
}

[data-theme="dark"] html {
    background: #000000;
}

[data-theme="dark"] body {
    background: #000000;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    padding: 24px 0;
    margin-bottom: 40px;
}

.fixed-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
    margin-bottom: 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .fixed-header {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.header-spacer {
    width: 60px;
}

.header-center {
    flex: 1;
    justify-content: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 32px;
    filter: drop-shadow(0 4px 8px rgba(20, 184, 166, 0.3));
}

.logo .icon-emoji {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.logo-icon-img {
    width: 48px;
    height: 48px;
    object-fit: contain;
    filter: drop-shadow(0 4px 8px rgba(20, 184, 166, 0.3));
}

.logo h1 {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--teal), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.back-button-header {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--card-bg);
    border: 1.5px solid var(--border);
    color: var(--teal);
    text-decoration: none;
    font-size: 24px;
    font-weight: 600;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.back-button-header:hover {
    background: rgba(20, 184, 166, 0.1);
    transform: scale(1.05);
}

.back-icon {
    line-height: 1;
}


/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 60px;
    padding: 40px 0;
}

.hero-content {
    max-width: 700px;
    margin: 0 auto;
}

.hero-icon {
    margin-bottom: 32px;
}

.icon-circle {
    width: 180px;
    height: 180px;
    margin: 0 auto;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--teal), var(--cyan));
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 40px rgba(20, 184, 166, 0.3);
    position: relative;
}

.icon-circle::before {
    content: '';
    position: absolute;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(20, 184, 166, 0.2), rgba(6, 182, 212, 0.2));
    filter: blur(20px);
    z-index: -1;
}

.icon-emoji {
    font-size: 80px;
}

.hero-logo-img {
    width: 200px;
    height: 200px;
    object-fit: contain;
    margin: 0 auto;
    display: block;
}

.hero-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--teal), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 20px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Section Title */
.section-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 32px;
    text-align: center;
    background: linear-gradient(135deg, var(--teal), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 60px;
}

@media (min-width: 900px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.service-card {
    background: var(--card-bg);
    border: 1.4px solid var(--border);
    border-radius: 26px;
    padding: 32px;
    text-align: center;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .service-card {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}


.service-icon {
    font-size: 48px;
    margin-bottom: 16px;
    display: block;
}

.service-card h4 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-secondary);
    font-size: 16px;
}

/* Zap Preview Card */
.zap-preview {
    margin-bottom: 60px;
}

.zap-card {
    background: rgba(20, 184, 166, 0.05);
    border: 1.4px solid var(--border);
    border-radius: 26px;
    padding: 40px;
    backdrop-filter: blur(10px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    cursor: pointer;
}

.zap-card:hover {
    transform: scale(1.05);
    border-color: var(--teal);
    box-shadow: 0 20px 50px rgba(20, 184, 166, 0.25);
}

[data-theme="dark"] .zap-card {
    background: rgba(20, 184, 166, 0.08);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

[data-theme="dark"] .zap-card:hover {
    border-color: var(--teal);
    box-shadow: 0 20px 50px rgba(20, 184, 166, 0.4);
}

.zap-icon-img {
    width: 120px;
    height: 120px;
    object-fit: contain;
    margin-bottom: 12px;
}

.zap-title-group {
    flex: 1;
}

.zap-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--teal), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.zap-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
}

.zap-description {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.zap-features {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 32px;
}

@media (min-width: 900px) {
    .zap-features {
        grid-template-columns: repeat(4, 1fr);
    }
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-primary);
    font-size: 16px;
}

.feature-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--teal), var(--cyan));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
}

.zap-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    background: linear-gradient(135deg, var(--teal), var(--cyan));
    color: white;
    padding: 18px 32px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px rgba(20, 184, 166, 0.3);
    border: 1.5px solid rgba(255, 255, 255, 0.2);
}

.zap-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(20, 184, 166, 0.4);
}

.button-arrow {
    font-size: 20px;
    transition: transform 0.3s ease;
}

.zap-button:hover .button-arrow {
    transform: translateX(4px);
}

/* Contact Section */
.contact {
    margin-bottom: 60px;
}

.contact-card {
    background: rgba(20, 184, 166, 0.05);
    border: 1.4px solid var(--border);
    border-radius: 26px;
    padding: 40px;
    text-align: center;
    backdrop-filter: blur(10px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
    text-decoration: none;
    color: inherit;
    display: block;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    cursor: pointer;
}

.contact-card:hover {
    transform: scale(1.02);
    border-color: var(--teal);
    box-shadow: 0 20px 50px rgba(20, 184, 166, 0.25);
}

[data-theme="dark"] .contact-card {
    background: rgba(20, 184, 166, 0.08);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

[data-theme="dark"] .contact-card:hover {
    border-color: var(--teal);
    box-shadow: 0 20px 50px rgba(20, 184, 166, 0.4);
}

.contact-card p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.contact-info {
    font-size: 18px;
    color: var(--text-primary);
    margin: 24px 0;
}

.contact-email {
    color: var(--teal);
    font-weight: 600;
}


.contact-note {
    margin-top: 24px;
    font-style: italic;
    color: var(--text-secondary);
}

/* App Header (zap.html) */
.app-header {
    text-align: center;
    margin-bottom: 60px;
    padding: 0 0 40px 0;
}

.app-icon-large {
    margin-bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 150px;
}

.icon-circle-large {
    width: 150px;
    height: 150px;
    margin: 0 auto;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 0;
}


.icon-emoji-large {
    font-size: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.app-logo-img {
    width: 150px;
    height: 150px;
    object-fit: contain;
}

.app-title {
    font-size: 48px;
    font-weight: 700;
    margin-top: 0;
    margin-bottom: 12px;
    padding-top: 0;
    background: linear-gradient(135deg, var(--teal), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.app-tagline {
    font-size: 22px;
    color: var(--text-secondary);
}

/* Description Card */
.description-card {
    background: var(--card-bg);
    border: 1.4px solid var(--border);
    border-radius: 26px;
    padding: 40px;
    margin-bottom: 60px;
    backdrop-filter: blur(10px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .description-card {
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.description-card h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    margin-top: 32px;
    color: var(--text-primary);
}

.description-card h3:first-child {
    margin-top: 0;
}

.description-card p {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.description-card a {
    color: var(--teal);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.description-card a:hover {
    color: var(--cyan);
}

.description-card strong {
    color: var(--text-primary);
}

.description-card em {
    font-style: italic;
    color: var(--text-secondary);
    font-size: 16px;
}

.description-card ul {
    margin: 16px 0;
    padding-left: 24px;
    color: var(--text-secondary);
}

.description-card li {
    margin-bottom: 8px;
    line-height: 1.6;
    font-size: 18px;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

.feature-card {
    background: var(--card-bg);
    border: 1.4px solid var(--border);
    border-radius: 26px;
    padding: 32px;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .feature-card {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}


.feature-icon-wrapper {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--teal), var(--cyan));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    box-shadow: 0 8px 20px rgba(20, 184, 166, 0.3);
}

.feature-icon-large {
    font-size: 32px;
}

.feature-card h4 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Support Section */
.support {
    margin-bottom: 60px;
}

.support-card {
    background: var(--card-bg);
    border: 1.4px solid var(--border);
    border-radius: 26px;
    padding: 40px;
    backdrop-filter: blur(10px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .support-card {
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.support-card > p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    text-align: center;
}

.support-options {
    display: grid;
    gap: 24px;
    margin-bottom: 32px;
}

.support-option {
    padding: 24px;
    background: rgba(20, 184, 166, 0.05);
    border-radius: 20px;
    border: 1px solid var(--border);
    text-decoration: none;
    color: inherit;
    display: block;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    cursor: pointer;
}

.support-option h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.support-option p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.support-option:hover {
    transform: scale(1.02);
    border-color: var(--teal);
    box-shadow: 0 10px 30px rgba(20, 184, 166, 0.25);
}

[data-theme="dark"] .support-option {
    background: rgba(20, 184, 166, 0.08);
}

[data-theme="dark"] .support-option:hover {
    border-color: var(--teal);
    box-shadow: 0 10px 30px rgba(20, 184, 166, 0.4);
}

.support-email {
    color: var(--teal);
    font-weight: 600;
}




/* Footer */
footer {
    text-align: center;
    padding: 40px 0;
    color: var(--text-secondary);
    font-size: 14px;
    border-top: 1px solid var(--border);
    margin-top: 60px;
}

footer p {
    margin-bottom: 24px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.footer-link {
    padding: 10px 20px;
    background: var(--card-bg);
    border: 1.4px solid var(--border);
    border-radius: 16px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    min-width: 120px;
    text-align: center;
    display: inline-block;
}

.footer-link:hover {
    background: rgba(20, 184, 166, 0.1);
    border-color: var(--teal);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(20, 184, 166, 0.2);
    color: var(--teal);
}

[data-theme="dark"] .footer-link {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .footer-link:hover {
    background: rgba(20, 184, 166, 0.15);
    box-shadow: 0 6px 16px rgba(20, 184, 166, 0.3);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    body {
        padding-top: 70px;
    }
    
    .hero {
        margin-bottom: 40px;
        padding: 20px 0;
    }
    
    .hero-title {
        font-size: 28px;
        margin-bottom: 16px;
    }
    
    .hero-description {
        font-size: 16px;
        line-height: 1.6;
    }
    
    .hero-icon {
        margin-bottom: 24px;
    }
    
    .app-title {
        font-size: 32px;
    }
    
    .app-tagline {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 24px;
        margin-bottom: 24px;
    }
    
    .zap-icon-img {
        width: 120px;
        height: 120px;
        margin-bottom: 10px;
    }
    
    .zap-title {
        font-size: 26px;
        margin-bottom: 12px;
    }
    
    .zap-subtitle {
        font-size: 16px;
    }
    
    .zap-description {
        font-size: 16px;
        line-height: 1.6;
        margin-bottom: 20px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        margin-bottom: 40px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        margin-bottom: 40px;
    }
    
    .zap-features {
        grid-template-columns: 1fr;
        gap: 12px;
        margin-bottom: 24px;
    }
    
    /* Reduced padding for all cards on mobile */
    .service-card {
        padding: 20px;
        border-radius: 20px;
    }
    
    .feature-card {
        padding: 20px;
        border-radius: 20px;
    }
    
    .zap-card {
        padding: 24px;
        border-radius: 20px;
    }
    
    .contact-card {
        padding: 24px;
        border-radius: 20px;
    }
    
    .description-card {
        padding: 24px;
        border-radius: 20px;
        margin-bottom: 40px;
    }
    
    .support-card {
        padding: 24px;
        border-radius: 20px;
        margin-bottom: 40px;
    }
    
    .support-option {
        padding: 16px;
    }
    
    .contact {
        margin-bottom: 40px;
    }
    
    .zap-preview {
        margin-bottom: 40px;
    }
    
    .support {
        margin-bottom: 40px;
    }
    
    .icon-circle {
        width: 120px;
        height: 120px;
    }
    
    .icon-circle::before {
        width: 160px;
        height: 160px;
    }
    
    .icon-circle-large {
        width: 100px;
        height: 100px;
    }
    
    .icon-emoji {
        font-size: 50px;
    }
    
    .hero-logo-img {
        width: 150px;
        height: 150px;
    }
    
    .icon-emoji-large {
        font-size: 60px;
    }
    
    .app-logo-img {
        width: 100px;
        height: 100px;
    }
    
    .app-icon-large {
        height: 100px;
    }
    
    .app-header {
        margin-bottom: 40px;
        padding: 0 0 24px 0;
    }
    
    .fixed-header {
        padding: 12px 0;
    }
    
    .header-content {
        padding: 0 16px;
    }
    
    .logo h1 {
        font-size: 24px;
    }
    
    .logo-icon-img {
        width: 40px;
        height: 40px;
    }
    
    .back-button-header {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }
    
    .service-icon {
        font-size: 36px;
        margin-bottom: 12px;
    }
    
    .service-card h4 {
        font-size: 20px;
        margin-bottom: 8px;
    }
    
    .service-card p {
        font-size: 14px;
    }
    
    .feature-icon-wrapper {
        width: 56px;
        height: 56px;
        margin-bottom: 16px;
    }
    
    .feature-icon-large {
        font-size: 28px;
    }
    
    .feature-card h4 {
        font-size: 20px;
        margin-bottom: 10px;
    }
    
    .feature-card p {
        font-size: 14px;
        line-height: 1.6;
    }
    
    .contact-card p {
        font-size: 16px;
        margin-bottom: 12px;
    }
    
    .contact-info {
        font-size: 16px;
        margin: 20px 0;
    }
    
    .support-card > p {
        font-size: 16px;
        margin-bottom: 24px;
    }
    
    .support-option h4 {
        font-size: 18px;
        margin-bottom: 10px;
    }
    
    .support-option p {
        font-size: 14px;
    }
    
    .description-card h3 {
        font-size: 24px;
        margin-bottom: 16px;
    }
    
    .description-card p {
        font-size: 16px;
        line-height: 1.6;
    }
    
    .description-card ul {
        margin: 12px 0;
        padding-left: 20px;
    }
    
    .description-card li {
        font-size: 16px;
        margin-bottom: 6px;
    }
    
    footer {
        padding: 30px 0;
        margin-top: 40px;
    }
    
    .footer-links {
        gap: 12px;
    }
    
    .footer-link {
        padding: 8px 16px;
        font-size: 13px;
        min-width: 100px;
    }
}