/* ========================================
   TELLBILL PROFESSIONAL LANDING PAGE
   White & Gold Enterprise Design
   ======================================== */

:root {
    --color-white: #FFFFFF;
    --color-white-off: #F8F8F8;
    --color-gold: #FFD700;
    --color-gold-accent: #FFCC00;
    --color-charcoal: #1C1C1C;
    --color-gray-light: #F0F0F0;
    --color-gray-medium: #666666;
    --color-gray-dark: #333333;
    
    --font-serif: 'Playfair Display', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    --transition: all 0.3s ease;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--color-charcoal);
    background-color: var(--color-white);
    line-height: 1.6;
}

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

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-charcoal);
}

h1 {
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-gray-medium);
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    font-family: var(--font-sans);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    text-transform: none;
    transition: var(--transition);
    display: inline-block;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-gold);
    color: var(--color-charcoal);
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
}

.btn-primary:hover {
    background-color: var(--color-gold-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-charcoal);
    border: 2px solid var(--color-charcoal);
    padding: 0.7rem 1.4rem;
    font-size: 0.95rem;
}

.btn-secondary:hover {
    background-color: var(--color-gray-light);
    border-color: var(--color-gold);
    color: var(--color-gold);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
    width: 100%;
    max-width: 300px;
}

.btn-cta {
    background: var(--color-charcoal);
    color: var(--color-white);
    padding: 1rem 3rem;
    font-size: 1.05rem;
    margin-bottom: var(--spacing-md);
}

.btn-cta:hover {
    background: var(--color-gold);
    color: var(--color-charcoal);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   NAVIGATION
   ======================================== */

.navbar {
    background-color: var(--color-white);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-gray-light);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-charcoal);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    flex: 1;
}

.nav-link {
    font-size: 0.95rem;
    color: var(--color-charcoal);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-gold);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-white-off) 100%);
}

.hero-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero h1 {
    font-size: 3rem;
    line-height: 1.15;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.hero-desc {
    font-size: 1rem;
    color: var(--color-gray-medium);
    margin-bottom: var(--spacing-lg);
}

.hero-ctas {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.hero-footnote {
    font-size: 0.85rem;
    color: var(--color-gray-medium);
}

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 600px;
}

/* ========================================
   IMAGE GALLERY - SIDE BY SIDE
   ======================================== */
.image-gallery {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    width: 100%;
    max-width: 1400px;
    padding: 0 20px;
}

.gallery-image {
    width: 100%;
    height: 100%;
    max-height: 500px;
    object-fit: contain;
    border-radius: 16px;
    box-shadow: 
        0 25px 60px rgba(0, 0, 0, 0.15), 
        0 0 0 1px rgba(255, 215, 0, 0.2),
        0 8px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                box-shadow 0.3s ease;
}

.gallery-image:hover {
    transform: translateY(-8px);
    box-shadow: 
        0 35px 80px rgba(0, 0, 0, 0.2), 
        0 0 0 1px rgba(255, 215, 0, 0.3),
        0 12px 24px rgba(0, 0, 0, 0.1);
}

/* Responsive */
@media (max-width: 1024px) {
    .image-gallery {
        gap: 24px;
    }
    
    .gallery-image {
        max-height: 450px;
    }
}

@media (max-width: 768px) {
    .hero-visual {
        height: auto;
        padding: 30px 0;
    }
    
    .image-gallery {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 16px;
    }
    
    .gallery-image {
        max-height: 350px;
    }
}

@media (max-width: 600px) {
    .hero-visual {
        padding: 24px 0;
    }
    
    .image-gallery {
        gap: 16px;
        padding: 0 14px;
    }
    
    .gallery-image {
        max-height: 280px;
    }
}

@media (max-width: 480px) {
    .hero-visual {
        padding: 20px 0;
    }
    
    .image-gallery {
        gap: 12px;
        padding: 0 10px;
    }
    
    .gallery-image {
        max-height: 240px;
    }
}

@media (max-width: 360px) {
    .gallery-image {
        max-height: 200px;
    }
}

@media (max-width: 768px) {
    .hero-wrapper {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-ctas {
        flex-direction: column;
    }
    
    .btn-large {
        max-width: 100%;
    }
}

/* ========================================
   WHY TELLBILL SECTION
   ======================================== */

.why-tellbill {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-white-off);
}

.why-tellbill h2 {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.why-card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: 10px;
    border-left: 4px solid var(--color-gold);
    transition: var(--transition);
}

.why-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.why-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

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

.why-card p {
    font-size: 0.95rem;
    color: var(--color-gray-medium);
    margin: 0;
}

/* ========================================
   FEATURES SECTION
   ======================================== */

.features {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-white);
}

.features h2 {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    font-size: 2rem;
}

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

.feature-card {
    background: var(--color-white-off);
    padding: var(--spacing-lg);
    border-radius: 10px;
    border-top: 3px solid var(--color-gold);
    transition: var(--transition);
}

.feature-card:hover {
    box-shadow: var(--shadow-md);
}

.feature-header h3 {
    color: var(--color-charcoal);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card > p {
    font-size: 0.95rem;
    color: var(--color-gray-medium);
    margin-bottom: var(--spacing-md);
}

.feature-list {
    list-style: none;
}

.feature-list li {
    font-size: 0.9rem;
    color: var(--color-gray-medium);
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
}

.feature-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-gold);
    font-weight: 700;
}

/* ========================================
   DEMO SECTION
   ======================================== */

.demo {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-accent) 100%);
    text-align: center;
}

.demo-content h2 {
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-md);
}

.demo-content p {
    color: var(--color-charcoal);
    font-size: 1.05rem;
    margin-bottom: var(--spacing-lg);
}

.demo-footnote {
    font-size: 0.9rem;
    color: var(--color-charcoal);
}

/* ========================================
   TESTIMONIALS SECTION
   ======================================== */

.testimonials {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-white);
}

.testimonials h2 {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.testimonial {
    background: var(--color-white-off);
    padding: var(--spacing-lg);
    border-radius: 8px;
    border-left: 4px solid var(--color-gold);
}

.stars {
    color: var(--color-gold);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.testimonial p {
    font-size: 1rem;
    font-style: italic;
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

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

.avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-gold);
    color: var(--color-charcoal);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
    flex-shrink: 0;
}

.name {
    font-weight: 600;
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.role {
    font-size: 0.85rem;
    color: var(--color-gray-medium);
}

/* ========================================
   PRICING SECTION
   ======================================== */

.pricing {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-white-off);
}

.pricing-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.pricing-header h2 {
    margin-bottom: var(--spacing-md);
}

.pricing-header p {
    font-size: 1.05rem;
    color: var(--color-gray-medium);
    max-width: 600px;
    margin: 0 auto;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1100px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--color-gray-light);
    position: relative;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.pricing-card:hover {
    border-color: var(--color-gold);
    box-shadow: var(--shadow-md);
}

.pricing-featured {
    border: 2px solid var(--color-gold);
    transform: scale(1.03);
}

.badge {
    position: absolute;
    top: -12px;
    right: var(--spacing-lg);
    background: var(--color-gold);
    color: var(--color-charcoal);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

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

.price {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
    margin-bottom: var(--spacing-sm);
}

.amount {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-gold);
    font-family: var(--font-serif);
}

.period {
    font-size: 1rem;
    color: var(--color-gray-medium);
}

.price-alt {
    font-size: 0.95rem;
    color: var(--color-gray-medium);
    margin-bottom: var(--spacing-md);
}

.save {
    background: var(--color-gold);
    color: var(--color-charcoal);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-left: 0.5rem;
}

.plan-desc {
    font-size: 0.95rem;
    color: var(--color-gray-medium);
    margin-bottom: var(--spacing-lg);
    flex-grow: 1;
}

.pricing-card .btn {
    margin-bottom: var(--spacing-lg);
}

.features {
    list-style: none;
}

.features .feature {
    font-size: 0.9rem;
    color: var(--color-gray-medium);
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
}

.features .feature:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-gold);
    font-weight: 700;
}

/* ========================================
   FAQ SECTION
   ======================================== */

.faq {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-white);
}

.faq h2 {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 0;
    max-width: 1000px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--color-gray-light);
    padding: var(--spacing-lg) 0;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    background: none;
    border: none;
    padding: 0;
    width: 100%;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-charcoal);
    transition: var(--transition);
    font-family: var(--font-sans);
}

.faq-question:hover {
    color: var(--color-gold);
}

.faq-question svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    transition: var(--transition);
    transform: rotate(-90deg);
    stroke: var(--color-gold);
}

.faq-question.active svg {
    transform: rotate(0deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer.active {
    max-height: 300px;
}

.faq-answer p {
    font-size: 0.95rem;
    color: var(--color-gray-medium);
    margin-top: var(--spacing-md);
}

/* ========================================
   FINAL CTA SECTION
   ======================================== */

.final-cta {
    padding: var(--spacing-2xl) 0;
    background: var(--color-charcoal);
    color: var(--color-white);
    text-align: center;
}

.final-cta h2 {
    color: var(--color-white);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.final-cta p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.05rem;
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cta-footnote {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
    background-color: var(--color-white-off);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--color-gray-light);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    gap: var(--spacing-lg);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-charcoal);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--color-gray-medium);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--color-gold);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-light);
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--color-gray-medium);
    margin: 0;
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 768px) {
    :root {
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-2xl: 2.5rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .pricing-featured {
        transform: scale(1);
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-ctas {
        flex-direction: column;
    }
    
    .nav-links {
        display: none;
    }
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

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

button:focus,
a:focus {
    outline: 2px solid var(--color-gold);
    outline-offset: 2px;
}

/* ========================================
   MODAL DIALOGS
   ======================================== */

/* Modal overlay - semi-transparent dark background */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    cursor: pointer;
}

/* Modal content container */
.modal-content {
    position: relative;
    background-color: var(--color-white);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    z-index: 1001;
    animation: slideUp 0.4s ease;
}

/* Modal close button (X icon) */
.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--color-charcoal);
    padding: var(--spacing-xs);
    transition: var(--transition);
    z-index: 10;
}

.modal-close:hover {
    color: var(--color-gold);
    transform: scale(1.1);
}

/* Modal header */
.modal-header {
    padding: var(--spacing-2xl) var(--spacing-lg) var(--spacing-lg);
    border-bottom: 1px solid var(--color-gray-light);
}

.modal-header h2 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-charcoal);
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 700;
}

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

/* Modal body content */
.modal-body {
    padding: var(--spacing-lg);
}

/* Modal footer */
.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-light);
    text-align: center;
}

.modal-cta {
    margin-bottom: var(--spacing-md);
    color: var(--color-gray-medium);
    font-size: 0.9rem;
}

/* Form styles within modal */
.modal-form .modal-body {
    padding: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--color-charcoal);
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-gray-light);
    border-radius: 4px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-gold);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* Video container in demo modal */
.modal-body video {
    border-radius: 4px;
    width: 100%;
    object-fit: cover;
}

/* Animation: Fade in modal */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Animation: Slide up modal content */
@keyframes slideUp {
    from {
        transform: translateY(40px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Responsive modal */
@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        max-height: 95vh;
    }
    
    .modal-header {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .modal-header h2 {
        font-size: 1.5rem;
    }
    
    .modal-body {
        padding: var(--spacing-md);
    }
    
    .modal-footer {
        padding: var(--spacing-md);
    }
    
    .modal-close {
        top: var(--spacing-sm);
        right: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .modal-content {
        width: 98%;
    }
    
    .modal-header h2 {
        font-size: 1.25rem;
    }
}