/* 
  BitQT Landing Page Styles
  Main Stylesheet
*/

/* Base Styles & Variables */
:root {
  /* Color system */
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-secondary: #1e293b;
  --color-secondary-light: #334155;
  --color-accent: #3b82f6;
  --color-accent-dark: #1d4ed8;
  --color-success: #3b82f6;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-text: #0f172a;
  --color-text-light: #64748b;
  --color-white: #ffffff;
  --color-background: #f8fafc;
  --color-card: #ffffff;
  --color-input-text: #000000;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, 
    Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 1rem;    /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem;  /* 36px */
  --font-size-5xl: 3rem;     /* 48px */
  
  /* Spacing (8px system) */
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-5: 1.25rem;  /* 20px */
  --space-6: 1.5rem;   /* 24px */
  --space-8: 2rem;     /* 32px */
  --space-10: 2.5rem;  /* 40px */
  --space-12: 3rem;    /* 48px */
  --space-16: 4rem;    /* 64px */
  --space-20: 5rem;    /* 80px */
  --space-24: 6rem;    /* 96px */
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 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-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Border Radius */
  --radius-sm: 0.25rem;  /* 4px */
  --radius-md: 0.375rem; /* 6px */
  --radius-lg: 0.5rem;   /* 8px */
  --radius-xl: 0.75rem;  /* 12px */
  --radius-2xl: 1rem;    /* 16px */
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  /* Container max-width */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-background);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

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

button {
  cursor: pointer;
  font-family: inherit;
}

ul, ol {
  list-style: none;
}

input, textarea, button {
  font-family: inherit;
  font-size: inherit;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-4);
  color: var(--color-secondary);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

p {
  margin-bottom: var(--space-4);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header h2 {
  margin-bottom: var(--space-4);
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
}

.section-header p {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* Buttons */
.btn {
  display: inline-block;
  font-weight: 600;
  text-align: center;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  border: 2px solid transparent;
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--color-white);
}

.btn-secondary:hover {
  background-color: var(--color-secondary-light);
  color: var(--color-white);
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-large {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
}

.cta-buttons {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

/* Forms */
.signup-form {
  margin-top: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-group {
  position: relative;
}

.signup-form input,
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-text-light);
  background-color: var(--color-white);
  color: #000000;
  transition: border-color var(--transition-fast);
}

.signup-form input::placeholder {
  color: var(--color-text-light);
}

.signup-form input:focus,
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(5px);
  box-shadow: var(--shadow-sm);
  z-index: 100;
  transition: background-color var(--transition-normal);
  padding: var(--space-4) 0;
}

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

.logo {
  font-size: var(--font-size-2xl);
  font-weight: 700;
}

.logo-text {
  color: var(--color-secondary);
}

.logo-text .highlight {
  color: var(--color-primary);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  color: var(--color-secondary);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-fast);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 30px;
  height: 3px;
  background-color: var(--color-secondary);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

/* Hero Section */
.hero {
  padding: var(--space-24) 0 var(--space-16);
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-background) 100%);
  overflow: hidden;
  position: relative;
}

.hero .container {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.hero-content {
  flex: 1;
}

.hero h1 {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--space-6);
  color: var(--color-secondary);
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-light);
  margin-bottom: var(--space-8);
}

.hero-image {
  position: relative;
  flex: 1;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.hero-stats {
  display: flex;
  gap: var(--space-8);
  margin-top: var(--space-8);
}

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

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-primary);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

/* Features Section */
.features {
  padding: var(--space-20) 0;
  background-color: var(--color-white);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-6);
}

.feature-card {
  background-color: var(--color-card);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  overflow: hidden;
  height: 100%;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  margin-bottom: var(--space-4);
}

.feature-icon img {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  object-fit: cover;
}

.feature-card h3 {
  margin-bottom: var(--space-3);
  color: var(--color-secondary);
}

.feature-card p {
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* How It Works Section */
.how-it-works {
  padding: var(--space-20) 0;
  background-color: var(--color-background);
}

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

.step {
  display: flex;
  gap: var(--space-6);
  margin-bottom: var(--space-10);
  position: relative;
}

.step:last-child {
  margin-bottom: 0;
}

.step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 60px;
  left: 24px;
  width: 2px;
  height: calc(100% + var(--space-8));
  background-color: var(--color-primary-light);
}

.step-number {
  width: 50px;
  height: 50px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  font-weight: 700;
  flex-shrink: 0;
  position: relative;
  z-index: 2;
}

.step-content h3 {
  margin-bottom: var(--space-2);
}

.step-content p {
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* Testimonials Section */
.testimonials {
  padding: var(--space-20) 0;
  background-color: var(--color-white);
}

.testimonials-slider {
  position: relative;
  width: 100%;
  overflow: hidden;
  margin-bottom: var(--space-8);
}

.testimonial-group {
  display: none;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.testimonial-group.active {
  display: grid;
}

.testimonial-card {
  background-color: var(--color-background);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

.testimonial-card:hover {
  transform: translateY(-5px);
}

.testimonial-content {
  margin-bottom: var(--space-4);
}

.testimonial-content p {
  font-style: italic;
  position: relative;
  padding: 0 var(--space-4);
}

.testimonial-content p::before,
.testimonial-content p::after {
  content: '"';
  font-size: var(--font-size-3xl);
  color: var(--color-primary-light);
  position: absolute;
}

.testimonial-content p::before {
  left: 0;
  top: -10px;
}

.testimonial-content p::after {
  right: 0;
  bottom: -10px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.testimonial-author img {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.author-info h4 {
  margin-bottom: 0;
}

.author-info p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-bottom: 0;
}

.testimonial-nav {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-8);
}

.nav-dot {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-light);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.nav-dot.active,
.nav-dot:hover {
  background-color: var(--color-primary);
  transform: scale(1.2);
}

/* FAQ Section */
.faq {
  padding: var(--space-20) 0;
  background-color: var(--color-background);
}

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

.faq-item {
  margin-bottom: var(--space-4);
  border-radius: var(--radius-lg);
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.faq-question {
  padding: var(--space-4) var(--space-6);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color var(--transition-fast);
}

.faq-question:hover {
  background-color: var(--color-primary-light);
}

.faq-question h3 {
  margin-bottom: 0;
  font-size: var(--font-size-lg);
}

.faq-question .icon {
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

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

.faq-answer {
  padding: 0 var(--space-6);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
}

.faq-item.active .faq-answer {
  padding: 0 var(--space-6) var(--space-6);
  max-height: 300px;
}

/* CTA Section */
.cta {
  padding: var(--space-20) 0;
  background-color: var(--color-primary);
  color: var(--color-white);
}

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

.cta h2 {
  color: var(--color-white);
}

.cta p {
  color: rgba(255, 255, 255, 0.9);
}

.cta .btn {
  margin-top: var(--space-8);
}

/* Contact Section */
.contact {
  padding: var(--space-20) 0;
  background-color: var(--color-white);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-form .form-group {
  margin-bottom: var(--space-4);
}

.contact-form label {
  display: block;
  margin-bottom: var(--space-2);
  font-weight: 500;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-text-light);
  transition: border-color var(--transition-fast);
  color: #000000;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.info-item h3 {
  margin-bottom: var(--space-2);
}

.info-item p {
  margin-bottom: var(--space-4);
  color: var(--color-text-light);
}

/* Footer */
.footer {
  background-color: var(--color-secondary);
  color: var(--color-white);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-12);
}

.footer-logo {
  max-width: 250px;
}

.footer-logo .logo-text {
  font-size: var(--font-size-2xl);
  color: var(--color-white);
  margin-bottom: var(--space-2);
  display: inline-block;
}

.footer-logo p {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
}

.footer-links {
  display: flex;
  gap: var(--space-16);
}

.footer-links-column h3 {
  color: var(--color-white);
  margin-bottom: var(--space-4);
  font-size: var(--font-size-lg);
}

.footer-links-column ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-links-column a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-2);
}

.disclaimer {
  font-style: italic;
}

.phone-group {
  display: flex;
  gap: var(--space-2);
}

.phone-group select {
  flex: 0 0 auto;
  width: 110px;
  padding: var(--space-3) var(--space-2);
  border: 2px solid var(--color-text-light);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  color: var(--color-input-text);
  transition: border-color var(--transition-fast);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  cursor: pointer;
}

.phone-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-primary-light);
}

.phone-group input {
  flex: 1;
}

.nav-link.btn-secondary {
  color: var(--color-white);
}

.nav-link.btn-secondary:hover {
  color: var(--color-white);
}