:root {
    /* Colors */
    --color-bg: #0f172a;
    /* Dark Navy */
    --color-bg-alt: #1e293b;
    /* Lighter Navy */
    --color-text: #f8fafc;
    /* Off-white */
    --color-text-muted: #94a3b8;
    --color-primary: #38bdf8;
    /* Electric Blue */
    --color-primary-hover: #0ea5e9;
    --color-accent: #2dd4bf;
    /* Teal */
    --color-accent-glow: rgba(45, 212, 191, 0.3);
    --color-border: #334155;

    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing */
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-full: 15px;
}

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

body {
    /* font-family: --font-body; Removed invalid line */
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-family: var(--font-body);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    line-height: 1.2;
    color: var(--color-text);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-padding {
    padding: var(--spacing-xl) 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: var(--color-bg);
    box-shadow: 0 0 20px var(--color-accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px var(--color-accent-glow);
    opacity: 0.9;
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

/* Header */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: var(--spacing-sm) 0;
    background-color: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    z-index: 100;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-link {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 40px;
    width: auto;
}

/* Mobile Button Styles */
.mobile-menu-btn {
    display: none !important;
    /* Force hide on desktop */
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
    /* Ensure above nav overlay */
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #f8fafc;
    /* Explicit white color */
    margin: 5px 0;
    transition: all 0.3s ease;
    border-radius: 3px;
}

/* Hamburger Animation classes */
.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
    background-color: var(--color-primary);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
    background-color: var(--color-primary);
}

.main-nav ul {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.main-nav a:not(.btn) {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

.main-nav a:not(.btn):hover {
    color: var(--color-primary);
}

/* Mobile Menu Styles */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block !important;
    }

    .main-nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        height: 100dvh;
        background-color: rgba(15, 23, 42, 0.98);
        display: flex;
        align-items: center;
        justify-content: center;
        transform: translateX(100%);
        visibility: hidden;
        transition: transform 0.3s ease-in-out, visibility 0.3s ease-in-out;
        z-index: 999;
        padding-top: 80px;
        /* Space for header */
    }

    .main-nav.active {
        transform: translateX(0);
        visibility: visible;
    }

    .main-nav ul {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
        width: 100%;
    }

    .main-nav a:not(.btn) {
        font-size: 1.5rem;
    }

    .logo-link {
        z-index: 101;
    }
}

/* Hero Section */
.hero {
    padding-top: calc(var(--spacing-xl) + 4rem);
    padding-bottom: var(--spacing-xl);
    position: relative;
    overflow: hidden;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.15) 0%, rgba(15, 23, 42, 0) 70%);
    border-radius: 50%;
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.eyebrow {
    display: inline-block;
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    background: rgba(45, 212, 191, 0.1);
    padding: 0.25rem 1rem;
    border-radius: var(--radius-full);
    border: 1px solid rgba(45, 212, 191, 0.2);
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(to bottom right, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    max-width: 650px;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.guarantee-text {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-left: 0.5rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    /* Nav handled in general styles above */
}

/* Solutions Section */
.solutions-section {
    background-color: var(--color-bg);
}

.solutions-tabs {
    max-width: 900px;
    margin: 0 auto;
}

.tabs-nav {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

.tab-btn {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 600;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-text);
}

.tab-btn.active {
    background-color: var(--color-primary);
    color: var(--color-bg);
    border-color: var(--color-primary);
    box-shadow: 0 0 15px var(--color-accent-glow);
}

.tabs-content {
    position: relative;
    min-height: 300px;
    /* Prevent layout shift */
}

.tab-pane {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-pane.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.solution-card {
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.7), rgba(15, 23, 42, 0.7));
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .solution-card {
        grid-template-columns: 1fr 2fr;
    }
}

@media (max-width: 768px) {
    .solution-card {
        padding: 1.5rem;
        gap: var(--spacing-sm);
    }

    .solution-body {
        gap: var(--spacing-sm);
    }
}

.solution-header h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.pain-summary {
    color: var(--color-text-muted);
    font-style: italic;
}

.solution-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.solution-item h4 {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
    color: var(--color-accent);
}

/* Guarantee Section (TVT-A) */
.guarantee-section {
    background-color: var(--color-bg-alt);
}

.tvta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.tvta-card {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    transition: transform 0.3s ease;
}

.tvta-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: var(--color-bg);
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-sm);
    box-shadow: 0 0 15px var(--color-accent-glow);
}

.tvta-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.mechanism {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.benefit {
    font-size: 0.9rem;
    color: var(--color-primary);
    font-weight: 500;
}

.solution-item.highlight {
    background-color: rgba(45, 212, 191, 0.05);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--color-accent);
}

/* CTA Section */
.cta-section {
    background: linear-gradient(to bottom, var(--color-bg), var(--color-bg-alt));
    text-align: center;
}

.cta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.cta-step {
    padding: var(--spacing-md);
    position: relative;
}

.step-number {
    width: 40px;
    height: 40px;
    background-color: var(--color-primary);
    color: var(--color-bg);
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-sm);
    font-size: 1.25rem;
}

.cta-step h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.cta-step p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.cta-final h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

/* Footer */
footer {
    background-color: var(--color-bg);
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}


/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(5px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    visibility: visible;
}

.modal.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.modal-content {
    background-color: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    width: 90%;
    max-width: 500px;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: translateY(0);
    transition: transform 0.3s ease;
    max-height: 90vh;
    overflow-y: auto;
}

.modal.hidden .modal-content {
    transform: translateY(20px);
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 2rem;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: color 0.3s ease;
    line-height: 1;
}

.close-modal:hover {
    color: var(--color-primary);
}

.modal-header {
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.modal-header h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.modal-header p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.95rem;
}

.form-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
    background-color: rgba(255, 255, 255, 0.1);
}

.btn-full {
    width: 100%;
    margin-top: var(--spacing-sm);
}

/* Hero Text Animation */
.word-span {
    opacity: 0;
    transition: opacity 0.5s ease;
    display: inline-block;
    /* Keeps words together */
    margin-right: 0.25em;
    /* Spacing between words */
}

.word-visible {
    opacity: 1;
}