/* Thiết kế CSS cho DeepnudeVN.pw - Phong cách độc đáo */

/* Biến màu và font */
:root {
  --color-primary: #8A1F4C;
  --color-secondary: #FF416C;
  --color-accent: #FFD166;
  --color-dark: #1A0112;
  --color-light: #FFF0F3;
  --color-background: #FFFAFF;
  --color-text: #2D0C21;
  --font-primary: 'Roboto', sans-serif;
  --font-secondary: 'Oswald', sans-serif;
  --shadow-default: 0 10px 30px rgba(138, 31, 76, 0.15);
  --transition: all 0.3s ease;
}

/* Reset và thiết lập cơ bản */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  color: var(--color-text);
  background-color: var(--color-background);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a:hover {
  color: var(--color-secondary);
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1.5rem;
}

ul {
  list-style: none;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  border-radius: 50px;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 1px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background: linear-gradient(45deg, var(--color-primary), var(--color-secondary));
  color: white;
  box-shadow: 0 4px 15px rgba(255, 65, 108, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(255, 65, 108, 0.6);
  color: white;
}

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

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

.section-padding {
  padding: 5rem 0;
}

.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 1rem;
  color: var(--color-primary);
  position: relative;
  display: inline-block;
  padding-bottom: 1rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(to right, var(--color-secondary), var(--color-primary));
}

.section-subtitle {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3rem;
  font-size: 1.1rem;
}

.text-center {
  text-align: center;
}

/* Header */
header {
  position: fixed;
  width: 100%;
  z-index: 100;
  background-color: rgba(255, 250, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-default);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  font-family: var(--font-secondary);
}

.logo svg {
  width: 35px;
  height: 35px;
  margin-right: 0.5rem;
}

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

.nav-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--color-primary);
  margin: 3px 0;
  transition: var(--transition);
}

.nav-menu {
  display: flex;
  align-items: center;
}

.nav-menu li {
  margin-left: 2rem;
}

.nav-menu a {
  color: var(--color-text);
  font-weight: 500;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(to right, var(--color-secondary), var(--color-primary));
  transition: var(--transition);
}

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

.nav-menu a:hover {
  color: var(--color-secondary);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--color-dark), var(--color-primary));
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 5rem;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100' viewBox='0 0 100 100'%3E%3Cpath fill='%23ffffff' fill-opacity='0.05' d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z'%3E%3C/path%3E%3C/svg%3E");
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
  color: var(--color-light);
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  line-height: 1.1;
  text-transform: uppercase;
  background: linear-gradient(to right, #fff, #FFD166);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.hero-btns {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Features */
.features {
  position: relative;
  overflow: hidden;
  background-color: var(--color-background);
}

.features::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 0;
  width: 100%;
  height: 100px;
  background-color: var(--color-background);
  clip-path: ellipse(50% 50% at 50% 100%);
  z-index: 2;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: white;
  border-radius: 20px;
  padding: 2rem;
  box-shadow: var(--shadow-default);
  transition: var(--transition);
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(to right, var(--color-secondary), var(--color-primary));
  z-index: -1;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(138, 31, 76, 0.2);
}

.feature-icon {
  width: 70px;
  height: 70px;
  border-radius: 20px;
  background: linear-gradient(45deg, var(--color-primary), var(--color-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.feature-icon svg {
  width: 40px;
  height: 40px;
  fill: white;
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--color-primary);
}

.feature-card p {
  color: var(--color-text);
  margin-bottom: 0;
  font-size: 1rem;
}

/* How It Works */
.how-it-works {
  background-color: var(--color-light);
  position: relative;
}

.how-it-works::before,
.how-it-works::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100px;
  background-color: var(--color-light);
  z-index: 1;
}

.how-it-works::before {
  top: -100px;
  clip-path: ellipse(50% 50% at 50% 100%);
}

.steps-container {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
}

.step {
  flex: 1;
  min-width: 250px;
  max-width: 350px;
  background: white;
  border-radius: 20px;
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow-default);
  transition: var(--transition);
  position: relative;
}

.step:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(138, 31, 76, 0.2);
}

.step-number {
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 40px;
  background: linear-gradient(45deg, var(--color-primary), var(--color-secondary));
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
  box-shadow: 0 5px 15px rgba(138, 31, 76, 0.3);
}

.step-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  background: rgba(138, 31, 76, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-icon svg {
  width: 40px;
  height: 40px;
  fill: var(--color-primary);
}

.step h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--color-primary);
}

/* Testimonials */
.testimonials {
  background-color: var(--color-background);
  position: relative;
}

.testimonial-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
  background: white;
  border-radius: 20px;
  box-shadow: var(--shadow-default);
  position: relative;
}

.testimonial-container::before {
  content: '"';
  position: absolute;
  top: -30px;
  left: 20px;
  font-size: 100px;
  font-family: serif;
  color: var(--color-secondary);
  opacity: 0.2;
  line-height: 1;
}

.testimonial-content {
  text-align: center;
}

.testimonial-text {
  font-style: italic;
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}

.testimonial-author {
  font-weight: 600;
  color: var(--color-primary);
}

/* FAQ */
.faq {
  background-color: var(--color-light);
}

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

.faq-item {
  background: white;
  border-radius: 10px;
  margin-bottom: 1rem;
  box-shadow: 0 3px 10px rgba(138, 31, 76, 0.1);
  overflow: hidden;
}

.faq-question {
  padding: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  color: var(--color-primary);
  font-family: var(--font-secondary);
}

.faq-question:hover {
  background: rgba(138, 31, 76, 0.05);
}

.faq-question svg {
  width: 24px;
  height: 24px;
  transition: var(--transition);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease;
  padding: 0 1.5rem;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: 1.5rem;
}

/* CTA */
.cta {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 80 80'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='M0 0h40v40H0V0zm40 40h40v40H40V40zm0-40h2l-2 2V0zm0 4l4-4h2l-6 6V4zm0 4l8-8h2L40 10V8zm0 4L52 0h2L40 14v-2zm0 4L56 0h2L40 18v-2zm0 4L60 0h2L40 22v-2zm0 4L64 0h2L40 26v-2zm0 4L68 0h2L40 30v-2zm0 4L72 0h2L40 34v-2zm0 4L76 0h2L40 38v-2zm0 4L80 0v2L42 40h-2zm4 0L80 4v2L46 40h-2zm4 0L80 8v2L50 40h-2zm4 0l28-28v2L54 40h-2zm4 0l24-24v2L58 40h-2zm4 0l20-20v2L62 40h-2zm4 0l16-16v2L66 40h-2zm4 0l12-12v2L70 40h-2zm4 0l8-8v2l-6 6h-2zm4 0l4-4v2l-2 2h-2z'/%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.3;
}

.cta-content {
  position: relative;
  z-index: 2;
  padding: 4rem 0;
}

.cta h2 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  color: white;
}

.cta p {
  max-width: 600px;
  margin: 0 auto 2rem;
  font-size: 1.1rem;
  opacity: 0.9;
}

.btn-light {
  background: white;
  color: var(--color-primary);
  font-weight: 700;
  box-shadow: 0 5px 15px rgba(255, 255, 255, 0.3);
}

.btn-light:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(255, 255, 255, 0.4);
  color: var(--color-secondary);
}

/* Footer */
footer {
  background-color: var(--color-dark);
  color: var(--color-light);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.footer-about {
  grid-column: span 2;
}

.footer-logo {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
  color: white;
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-secondary);
}

.footer-logo svg {
  width: 30px;
  height: 30px;
  margin-right: 0.5rem;
}

.footer-about p {
  color: rgba(255, 240, 243, 0.7);
  margin-bottom: 1rem;
}

.footer-heading {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  color: white;
}

.footer-links li {
  margin-bottom: 0.8rem;
}

.footer-links a {
  color: rgba(255, 240, 243, 0.7);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--color-accent);
  padding-left: 5px;
}

.copyright {
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 240, 243, 0.1);
  color: rgba(255, 240, 243, 0.6);
  font-size: 0.9rem;
}

/* Animation */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.active {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 {
  transition-delay: 0.2s;
}

.delay-2 {
  transition-delay: 0.4s;
}

.delay-3 {
  transition-delay: 0.6s;
}

/* Responsive Design */
@media screen and (max-width: 992px) {
  html {
    font-size: 14px;
  }
  
  .hero h1 {
    font-size: 3rem;
  }
}

@media screen and (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    right: -100%;
    width: 250px;
    height: 100vh;
    background: white;
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem;
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .nav-menu li {
    margin: 1.5rem 0;
    width: 100%;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .feature-card {
    padding: 1.5rem;
  }
}

@media screen and (max-width: 576px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero-btns {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .feature-icon {
    width: 60px;
    height: 60px;
  }
  
  .feature-icon svg {
    width: 30px;
    height: 30px;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .section-subtitle {
    font-size: 1rem;
  }
  
  .faq-question {
    padding: 1rem;
    font-size: 0.9rem;
  }
}