/*
* FILE: styles.css
* PROJECT: Master the Art of Marketing
* DESCRIPTION: Advanced CSS for a premium multi-page website.
*/

/* ---=== 1. CSS RESET & DEFAULTS ===--- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 100%;
}

body {
  font-family: 'Roboto', 'Open Sans', sans-serif;
  line-height: 1.6;
  background-color: var(--color-background);
  color: var(--color-text);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Roboto', 'Open Sans', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-headings);
  margin-bottom: 1rem;
}

/* ---=== 2. ROOT VARIABLES (THEME) ===--- */
:root {
  /* Colors */
  --color-primary: #0a2463; /* Dark Blue */
  --color-secondary: #3e92cc; /* Rich Blue */
  --color-accent: #d8315b; /* Accent Pink/Orange */
  --color-accent-glow: rgba(216, 49, 91, 0.4);
  --color-headings: #1e1b18;
  --color-text: #4a4a4a;
  --color-background: #f8f9fa;
  --color-light-bg: #ffffff;
  --color-white: #fff;
  --color-dark-bg: #111827;

  /* Typography */
  --font-primary: 'Roboto', 'Open Sans', sans-serif;
  --fs-h1: clamp(2.5rem, 5vw + 1rem, 4.5rem);
  --fs-h2: clamp(2rem, 4vw + 0.5rem, 3rem);
  --fs-h3: clamp(1.5rem, 2vw + 0.5rem, 2rem);
  --fs-body: clamp(1rem, 1vw + 0.5rem, 1.125rem);

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-xxl: 6rem;
  --section-padding: clamp(var(--space-xl), 10vh, var(--space-xxl));

  /* Borders & Shadows */
  --border-radius: 8px;
  --shadow-sm: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Transitions */
  --transition-fast: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

/* ---=== 3. GENERAL LAYOUT & HELPERS ===--- */
.container {
  width: 90%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.section {
  padding: var(--section-padding) 0;
  position: relative;
}

.section--dark {
  background-color: var(--color-dark-bg);
  color: var(--color-white);
}

.section--dark h1, .section--dark h2, .section--dark h3 {
  color: var(--color-white);
}

.text-center { text-align: center; }
.text-accent { color: var(--color-accent); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0; }

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

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

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

/* ---=== 4. HEADER & NAVIGATION ===--- */
.main-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-fast);
}

.main-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
}

.nav-links a {
  font-weight: 500;
  color: var(--color-headings);
  position: relative;
  padding: 0.5rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-fast);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-links a.active {
  color: var(--color-primary);
}

.nav-cta a {
  display: none;
}

.hamburger {
  display: none;
  cursor: pointer;
  z-index: 1001;
  background: none;
  border: none;
}

.hamburger__bar {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px auto;
  transition: all 0.3s ease-in-out;
  background-color: var(--color-primary);
}


/* ---=== 5. HERO SECTION ("GRADIENT FLOW") ===--- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl) var(--space-md);
  position: relative;
  color: var(--color-white);
  text-align: center;
  overflow: hidden;
  background: linear-gradient(-45deg, #0a2463, #3e92cc, #2c7da0, #012a4a);
  background-size: 400% 400%;
  animation: gradientBG 15s ease infinite;
}

@keyframes gradientBG {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
}

.hero h1 {
  font-size: var(--fs-h1);
  font-weight: 900;
  color: var(--color-white);
  text-shadow: 0 2px 4px rgba(0,0,0,0.5);
  margin-bottom: var(--space-md);
}

.hero p {
  font-size: var(--fs-h3);
  font-weight: 300;
  max-width: 700px;
  margin: 0 auto var(--space-lg) auto;
  opacity: 0.9;
}

/* ---=== 6. BUTTONS (Pulsing Gradient CTA) ===--- */
.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  border-radius: 50px;
  font-weight: 700;
  text-align: center;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  border: none;
  cursor: pointer;
}

.btn--primary {
  background-image: linear-gradient(45deg, var(--color-accent) 0%, var(--color-secondary) 100%);
  color: var(--color-white);
  box-shadow: 0 4px 15px 0 rgba(62,146,204, 0.75);
  position: relative;
  z-index: 1;
  overflow: hidden;
  animation: pulse 2s infinite;
}

.btn--primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px 0 rgba(62,146,204, 0.85);
  color: var(--color-white);
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 var(--color-accent-glow); }
  70% { box-shadow: 0 0 0 10px rgba(219, 56, 122, 0); }
  100% { box-shadow: 0 0 0 0 rgba(219, 56, 122, 0); }
}

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

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


/* ---=== 7. WAVE DIVIDERS ===--- */
.wave-divider {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  overflow: hidden;
  line-height: 0;
  transform: rotate(180deg);
}

.wave-divider svg {
  position: relative;
  display: block;
  width: calc(100% + 1.3px);
  height: 120px;
}

.wave-divider .shape-fill {
  fill: var(--color-background);
}

.wave-divider.top {
  top: 0;
  bottom: auto;
  transform: rotate(0);
}

.wave-divider.top .shape-fill {
  fill: var(--color-background);
}

.section--dark + .section > .wave-divider.top .shape-fill {
  fill: var(--color-dark-bg);
}

/* ---=== 8. FEATURES SECTION (Glassmorphism Cards) ===--- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.feature-card {
  background: rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: var(--space-lg);
  text-align: center;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-md);
}

.feature-card__icon {
  font-size: 3rem;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
  background: linear-gradient(45deg, var(--color-accent), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

/* ---=== 9. SERVICES & COURSE CARDS ===--- */
.service-card {
  background: var(--color-light-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.service-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.service-card__content {
  padding: var(--space-lg);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.service-card__content h3 {
  margin-bottom: var(--space-sm);
}

.service-card__content p {
  margin-bottom: var(--space-md);
  flex-grow: 1;
}

/* ---=== 10. TESTIMONIALS (Floating Bubbles) ===--- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.testimonial-card {
  background: var(--color-light-bg);
  padding: var(--space-lg);
  border-radius: var(--border-radius);
  position: relative;
  box-shadow: var(--shadow-md);
  border-top: 4px solid;
  border-image: linear-gradient(to right, var(--color-secondary), var(--color-accent)) 1;
}

.testimonial-card::before {
  content: '“';
  position: absolute;
  top: -10px;
  left: 20px;
  font-size: 5rem;
  font-weight: 900;
  color: var(--color-secondary);
  opacity: 0.1;
  line-height: 1;
}

.testimonial-card__text {
  font-style: italic;
  margin-bottom: var(--space-md);
}

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

.testimonial-card__author img {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  object-fit: cover;
}

.testimonial-card__author-info h4 {
  font-size: 1rem;
  margin: 0;
}

.testimonial-card__author-info span {
  font-size: 0.9rem;
  color: var(--color-text);
}

/* ---=== 11. FAQ SECTION (Accordion) ===--- */
.faq-accordion {
  max-width: 800px;
  margin: var(--space-xl) auto 0;
}

.faq-item {
  border-bottom: 1px solid #e0e0e0;
}

.faq-item__question {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: var(--space-md);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item__question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--color-secondary);
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-item__question::after {
  transform: rotate(45deg);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s cubic-bezier(0, 1, 0, 1), padding 0.5s ease;
  padding: 0 var(--space-md);
}

.faq-item.active .faq-item__answer {
  max-height: 500px; /* Adjust as needed */
  padding: 0 var(--space-md) var(--space-md);
  transition: max-height 1s cubic-bezier(1, 0, 1, 0), padding 0.5s ease;
}

/* ---=== 12. PARTNERS / LOGO GRID ===--- */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-lg);
  align-items: center;
  margin-top: var(--space-xl);
}

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

.partner-logo img {
  max-height: 60px;
  width: auto;
  margin: 0 auto;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: filter var(--transition-fast), opacity var(--transition-fast);
}

.partner-logo:hover img {
  filter: grayscale(0%);
  opacity: 1;
}


/* ---=== 13. FOOTER ===--- */
.main-footer {
  background-color: var(--color-dark-bg);
  color: rgba(255,255,255,0.7);
  padding: var(--space-xl) 0;
  font-size: 0.9rem;
  position: relative;
}

.footer-gradient-line {
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
}

.footer-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-xl);
  padding-bottom: var(--space-lg);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-col h4 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
  font-size: 1.1rem;
}

.footer-col p {
  margin-bottom: var(--space-sm);
}

.footer-nav {
  list-style: none;
}

.footer-nav li {
  margin-bottom: var(--space-xs);
}

.footer-nav a {
  color: rgba(255,255,255,0.7);
}

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

.socials {
  display: flex;
  gap: var(--space-sm);
}

.socials a {
  font-size: 1.5rem;
  color: rgba(255,255,255,0.7);
}

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

/* ---=== 14. CONTACT PAGE ===--- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.contact-form {
  display: flex;
  flex-direction: column;
}

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

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

.form-control {
  width: 100%;
  padding: 0.8rem 1rem;
  border-radius: var(--border-radius);
  border: 1px solid #ccc;
  font-size: 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(62,146,204, 0.2);
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.contact-info-item i {
  font-size: 1.5rem;
  color: var(--color-secondary);
  width: 30px;
}

/* ---=== 15. COOKIE BANNER ===--- */
#cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(17, 24, 39, 0.95);
  color: var(--color-white);
  padding: var(--space-md);
  display: none;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  z-index: 9999;
  flex-wrap: wrap;
}

#cookie-banner p {
  margin: 0;
  text-align: center;
  font-size: 0.9rem;
}

#cookie-banner .cookie-buttons {
  display: flex;
  gap: var(--space-sm);
}

.cookie-btn {
  padding: 0.6rem 1.2rem;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  font-weight: 600;
  transition: background-color var(--transition-fast);
}

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

.cookie-btn.accept:hover {
  background-color: #357cb5;
}

.cookie-btn.decline {
  background-color: #4b5563;
  color: var(--color-white);
}

.cookie-btn.decline:hover {
  background-color: #6b7280;
}

/* ---=== 16. RESPONSIVE DESIGN ===--- */
@media (max-width: 1024px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    height: 100vh;
    width: 60%;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: #ffffff;
    box-shadow: -5px 0 15px rgba(0,0,0,0.1);
    transition: right 0.5s ease-in-out;
  }

  .nav-links.active {
    right: 0;
  }

  .hamburger {
    display: block;
  }

  .hamburger.active .hamburger__bar:nth-child(2) {
    opacity: 0;
  }
  .hamburger.active .hamburger__bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  .hamburger.active .hamburger__bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
  
  .nav-cta a {
    display: block;
  }

  .footer-container {
    text-align: center;
  }
  .socials {
    justify-content: center;
  }

}