/* ===================================
   Tavix Marketing Website Styles
   Theme: #667eea → #764ba2 gradient
   =================================== */

/* CSS Variables */
:root {
    /* Primary Colors */
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --secondary: #764ba2;
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-hover: linear-gradient(135deg, #5a67d8 0%, #6b3fa0 100%);
    
    /* Accent Colors */
    --blue: #3b82f6;
    --purple: #8b5cf6;
    --pink: #ec4899;
    --cyan: #06b6d4;
    --green: #10b981;
    --yellow: #f59e0b;
    --red: #ef4444;
    
    /* Neutrals */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing */
    --container-max: 1280px;
    --section-padding: 100px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius);
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient);
    color: var(--white);
    box-shadow: 0 4px 14px 0 rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    background: var(--gradient-hover);
    box-shadow: 0 6px 20px 0 rgba(102, 126, 234, 0.5);
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.btn-ghost:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

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

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

/* ===================================
   Navigation
   =================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-100);
    transition: var(--transition);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-900);
}

.nav-logo-icon {
    border-radius: var(--radius-sm);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--gray-600);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    transition: var(--transition);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    z-index: 999;
    padding: 24px;
}

.mobile-menu.active {
    display: block;
}

.mobile-menu-links {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mobile-link {
    font-size: 18px;
    font-weight: 500;
    color: var(--gray-700);
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-100);
}

.mobile-actions {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero-gradient {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 60%);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(102, 126, 234, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(102, 126, 234, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-600);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--green);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    color: var(--gray-900);
    margin-bottom: 24px;
}

.text-gradient {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--gray-600);
    margin-bottom: 32px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.hero-stat {
    display: flex;
    flex-direction: column;
}

.hero-stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--gray-900);
}

.hero-stat-label {
    font-size: 14px;
    color: var(--gray-500);
}

/* Hero Phone Visual */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
}

.hero-phone {
    position: relative;
    width: 320px;
    height: 640px;
    background: var(--gray-900);
    border-radius: 48px;
    padding: 12px;
    box-shadow: var(--shadow-xl);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--white);
    border-radius: 40px;
    overflow: hidden;
}

.phone-header {
    display: flex;
    justify-content: center;
    padding: 12px;
}

.phone-notch {
    width: 120px;
    height: 28px;
    background: var(--gray-900);
    border-radius: 20px;
}

.phone-content {
    padding: 20px;
    height: calc(100% - 52px);
}

.call-ui {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.call-avatar {
    width: 80px;
    height: 80px;
    margin: 0 auto 16px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.call-avatar svg {
    width: 40px;
    height: 40px;
    color: var(--white);
}

.call-info {
    text-align: center;
    margin-bottom: 24px;
}

.call-name {
    display: block;
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.call-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    color: var(--gray-500);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--green);
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

.sound-wave {
    display: flex;
    justify-content: center;
    gap: 4px;
    height: 40px;
    margin-bottom: 24px;
}

.sound-wave span {
    width: 4px;
    background: var(--primary);
    border-radius: 2px;
    animation: soundWave 1s ease-in-out infinite;
    animation-delay: var(--delay);
}

@keyframes soundWave {
    0%, 100% { height: 8px; }
    50% { height: 32px; }
}

.transcript {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
    overflow: hidden;
}

.transcript-message {
    padding: 12px 16px;
    border-radius: 16px;
    font-size: 13px;
    line-height: 1.4;
    max-width: 90%;
}

.transcript-message.ai {
    background: var(--gray-100);
    color: var(--gray-700);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.transcript-message.user {
    background: var(--gradient);
    color: var(--white);
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.typing-dots {
    display: flex;
    gap: 4px;
}

.typing-dots span {
    width: 6px;
    height: 6px;
    background: var(--gray-400);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-4px); }
}

/* ===================================
   Logos Section
   =================================== */
.logos-section {
    padding: 60px 0;
    background: var(--gray-50);
    border-top: 1px solid var(--gray-100);
    border-bottom: 1px solid var(--gray-100);
}

.logos-title {
    text-align: center;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 32px;
}

.logos-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 48px;
    flex-wrap: wrap;
}

.logo-item {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-400);
    padding: 12px 24px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    background: var(--white);
}

/* ===================================
   Section Common Styles
   =================================== */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 64px;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 40px;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--gray-600);
    line-height: 1.7;
}

/* ===================================
   Features Section
   =================================== */
.features {
    padding: var(--section-padding) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    padding: 32px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(var(--color), 0.1) 0%, rgba(var(--color), 0.05) 100%);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: var(--color);
}

.feature-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ===================================
   How It Works Section
   =================================== */
.how-it-works {
    padding: var(--section-padding) 0;
    background: var(--gray-50);
}

.steps {
    max-width: 800px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 24px;
    padding: 32px 0;
    border-bottom: 1px solid var(--gray-200);
}

.step:last-child {
    border-bottom: none;
}

.step-number {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient);
    color: var(--white);
    font-size: 20px;
    font-weight: 700;
    border-radius: 50%;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.step-desc {
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ===================================
   Pricing Section
   =================================== */
.pricing {
    padding: var(--section-padding) 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 1100px;
    margin: 0 auto;
}

.pricing-card {
    position: relative;
    padding: 40px 32px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.pricing-card:hover {
    border-color: var(--gray-300);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
    border-color: var(--primary);
    box-shadow: var(--shadow-xl);
    transform: scale(1.05);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 16px;
    background: var(--gradient);
    color: var(--white);
    font-size: 13px;
    font-weight: 600;
    border-radius: 100px;
}

.pricing-header {
    text-align: center;
    margin-bottom: 24px;
}

.pricing-name {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.pricing-desc {
    font-size: 14px;
    color: var(--gray-500);
}

.pricing-amount {
    text-align: center;
    margin-bottom: 32px;
}

.price {
    font-size: 48px;
    font-weight: 800;
    color: var(--gray-900);
}

.period {
    font-size: 16px;
    color: var(--gray-500);
}

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 15px;
    color: var(--gray-600);
    border-bottom: 1px solid var(--gray-100);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features svg {
    width: 20px;
    height: 20px;
    color: var(--green);
    flex-shrink: 0;
}

/* ===================================
   Testimonials Section
   =================================== */
.testimonials {
    padding: var(--section-padding) 0;
    background: var(--gray-50);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.testimonial-card {
    padding: 32px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.testimonial-stars {
    color: var(--yellow);
    font-size: 18px;
    margin-bottom: 16px;
}

.testimonial-text {
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 24px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient);
    color: var(--white);
    font-size: 16px;
    font-weight: 600;
    border-radius: 50%;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-900);
}

.author-role {
    font-size: 13px;
    color: var(--gray-500);
}

/* ===================================
   FAQ Section
   =================================== */
.faq {
    padding: var(--section-padding) 0;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--gray-200);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    font-size: 17px;
    font-weight: 600;
    color: var(--gray-900);
    text-align: left;
    cursor: pointer;
}

.faq-question svg {
    width: 20px;
    height: 20px;
    color: var(--gray-400);
    transition: var(--transition);
}

.faq-item.active .faq-question svg {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding-bottom: 24px;
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-answer p {
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.7;
}

/* ===================================
   CTA Section
   =================================== */
.cta {
    padding: var(--section-padding) 0;
    background: var(--gradient);
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: 40px;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 16px;
}

.cta-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
}

.cta-actions {
    display: flex;
    justify-content: center;
    margin-bottom: 16px;
}

.cta-note {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

/* ===================================
   Footer
   =================================== */
.footer {
    padding: 80px 0 40px;
    background: var(--gray-900);
    color: var(--gray-400);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(4, 1fr);
    gap: 48px;
    margin-bottom: 48px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.footer-tagline {
    font-size: 15px;
    color: var(--gray-400);
    max-width: 280px;
}

.footer-links h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 20px;
}

.footer-links a {
    display: block;
    font-size: 14px;
    color: var(--gray-400);
    padding: 8px 0;
    transition: var(--transition);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid var(--gray-800);
}

.footer-bottom p {
    font-size: 14px;
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: var(--gray-800);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary);
}

.footer-social svg {
    width: 18px;
    height: 18px;
}

/* ===================================
   Responsive Design
   =================================== */

/* Tablet */
@media (max-width: 1024px) {
    :root {
        --section-padding: 80px;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .features-grid,
    .pricing-grid,
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-brand {
        grid-column: span 3;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .nav-links,
    .nav-actions {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .hero {
        min-height: auto;
        padding: 120px 0 60px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 24px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .step {
        gap: 16px;
    }
    
    .step-number {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-title {
        font-size: 28px;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
    
    .footer-brand {
        grid-column: span 2;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
}