/* ============================================
   DL360Tech - Modern Music Software Design
   ============================================ */

/* === CSS Custom Properties === */
:root {
  /* Colors - Dark Mode Palette */
  --color-bg-primary: #0a0a0f;
  --color-bg-secondary: #131318;
  --color-bg-tertiary: #1a1a24;
  --color-bg-glass: rgba(26, 26, 36, 0.7);

  /* Gradient Colors */
  --color-purple: #8b5cf6;
  --color-blue: #3b82f6;
  --color-cyan: #06b6d4;
  --color-pink: #ec4899;

  /* Text Colors */
  --color-text-primary: #ffffff;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #71717a;

  /* Accent Colors */
  --color-accent-primary: var(--color-purple);
  --color-accent-secondary: var(--color-blue);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Typography */
  --font-heading: "Space Grotesk", "Montserrat", sans-serif;
  --font-body: "Inter", sans-serif;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(139, 92, 246, 0.3);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Container */
  --container-max: 1280px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === Typography === */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  background: linear-gradient(135deg, var(--color-purple), var(--color-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 8s ease infinite;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--color-text-primary);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--color-text-primary);
}

p {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

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

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

/* === Container === */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* === Header === */
.main-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(139, 92, 246, 0.1);
  transition: all var(--transition-base);
}

.main-header.scrolled {
  background: rgba(10, 10, 15, 0.95);
  box-shadow: var(--shadow-md);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text-primary);
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.05);
}

.logo span {
  background: linear-gradient(135deg, var(--color-purple), var(--color-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.main-nav ul {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
  align-items: center;
}

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

.main-nav a:not(.btn)::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-purple), var(--color-blue));
  transition: width var(--transition-base);
}

.main-nav a:not(.btn):hover::after,
.main-nav a.active:not(.btn)::after {
  width: 100%;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-text-primary);
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.mobile-toggle .bar {
  width: 28px;
  height: 3px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* === Buttons === */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text-primary);
  background: linear-gradient(135deg, var(--color-purple), var(--color-blue));
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-blue), var(--color-cyan));
  transition: left var(--transition-base);
  z-index: -1;
}

.btn:hover::before {
  left: 0;
}

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

.btn:active {
  transform: translateY(0);
}

.btn-sm {
  padding: 0.625rem 1.5rem;
  font-size: 0.9375rem;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-purple);
  box-shadow: none;
}

.btn-outline::before {
  background: linear-gradient(135deg, var(--color-purple), var(--color-blue));
}

.btn-outline:hover {
  border-color: transparent;
}

/* === Hero Section === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: var(--spacing-3xl) 0;
  margin-top: 80px;
  overflow: hidden;
  background-image: url("../assets/hero-background.png");
  background-size: 110%;
  background-position: center;
  background-repeat: no-repeat;
  animation: heroBackgroundZoom 20s ease-in-out infinite alternate;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    180deg,
    rgba(10, 10, 15, 0.7),
    rgba(10, 10, 15, 0.5)
  );
  z-index: 0;
  animation: overlayPulse 8s ease-in-out infinite alternate;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle at 50% 50%,
    rgba(59, 130, 246, 0.15),
    transparent 50%
  );
  animation: pulse 10s ease-in-out infinite reverse;
  z-index: 0;
}

.hero-content {
  text-align: center;
  position: relative;
  z-index: 1;
  animation: fadeInUp 1s ease;
}

.hero-content h1 {
  margin-bottom: var(--spacing-md);
}

.hero-content p {
  font-size: 1.5rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* === Sections === */
section {
  padding: var(--spacing-3xl) 0;
  position: relative;
}

.page-header {
  padding: var(--spacing-2xl) 0 var(--spacing-xl);
  margin-top: 80px;
  text-align: center;
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.05), transparent);
}

.page-header h1 {
  margin-bottom: var(--spacing-sm);
}

.page-header p {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
}

/* === About Section === */
.about-section {
  background: var(--color-bg-secondary);
}

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

.about-text {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-text p {
  font-size: 1.25rem;
  line-height: 1.8;
}

/* === Workflow Section === */
.workflow-section {
  background: var(--color-bg-primary);
}

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

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

.workflow-card {
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.workflow-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-purple), var(--color-blue));
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.workflow-card:hover::before {
  transform: scaleX(1);
}

.workflow-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: rgba(139, 92, 246, 0.5);
}

.workflow-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  display: block;
}

.workflow-icon-img {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--spacing-md);
  display: block;
  filter: drop-shadow(0 4px 12px rgba(139, 92, 246, 0.3));
  transition: transform var(--transition-base);
}

.workflow-card:hover .workflow-icon-img {
  transform: scale(1.1);
}

.workflow-card h3 {
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.workflow-card p {
  color: var(--color-text-secondary);
  font-size: 1rem;
}

/* === Features Grid === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.feature-card {
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: rgba(139, 92, 246, 0.5);
}

.feature-card h3 {
  margin-bottom: var(--spacing-md);
}

/* === Education Grid === */
.education-content {
  padding: var(--spacing-2xl) 0;
}

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

.edu-card {
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
}

.edu-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: rgba(139, 92, 246, 0.5);
}

.edu-card h3 {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

.edu-card p {
  color: var(--color-text-secondary);
}

/* === Podcasts Grid === */
.podcast-content {
  padding: var(--spacing-2xl) 0;
}

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

.podcast-card {
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(236, 72, 153, 0.2);
  /* Pink border */
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  text-align: center;
  /* Center align content */
}

.podcast-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-pink), var(--color-cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.podcast-card:hover::before {
  transform: scaleX(1);
}

.podcast-card:hover {
  transform: translateY(-8px);
  box-shadow:
    var(--shadow-lg),
    0 0 20px rgba(236, 72, 153, 0.2);
  border-color: rgba(236, 72, 153, 0.5);
}

.podcast-card h3 {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

.podcast-card p {
  color: var(--color-text-secondary);
}

/* === Forms === */
.form-section {
  padding: var(--spacing-2xl) 0;
}

.form-container {
  max-width: 600px;
  margin: 0 auto;
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
}

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

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-primary);
  font-weight: 500;
  font-size: 0.9375rem;
}

.form-control {
  width: 100%;
  padding: 0.875rem 1rem;
  background: rgba(26, 26, 36, 0.6);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-base);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-purple);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
  background: rgba(26, 26, 36, 0.8);
}

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

select.form-control {
  cursor: pointer;
}

.form-submit {
  width: 100%;
  margin-top: var(--spacing-md);
}

/* === Footer === */
.main-footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid rgba(139, 92, 246, 0.1);
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.main-footer p {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

/* === Animations === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 1;
  }

  50% {
    transform: scale(1.1);
    opacity: 0.8;
  }
}

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

  50% {
    background-position: 100% 50%;
  }
}

@keyframes heroBackgroundZoom {
  0% {
    background-size: 110%;
    background-position: center center;
  }

  50% {
    background-size: 120%;
    background-position: 48% 52%;
  }

  100% {
    background-size: 110%;
    background-position: center center;
  }
}

@keyframes overlayPulse {
  0% {
    background: linear-gradient(
      180deg,
      rgba(10, 10, 15, 0.7),
      rgba(10, 10, 15, 0.5)
    );
  }

  100% {
    background: linear-gradient(
      180deg,
      rgba(10, 10, 15, 0.6),
      rgba(10, 10, 15, 0.4)
    );
  }
}

.fade-in {
  animation: fadeInUp 0.8s ease;
}

/* === Responsive Design === */
@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(20px);
    transition: left var(--transition-base);
    padding: var(--spacing-xl);
  }

  .main-nav.active {
    left: 0;
  }

  .main-nav ul {
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: flex-start;
  }

  .mobile-toggle {
    display: flex;
  }

  .mobile-toggle.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
  }

  .mobile-toggle.active .bar:nth-child(2) {
    opacity: 0;
  }

  .mobile-toggle.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
  }

  .hero {
    min-height: 80vh;
    margin-top: 80px;
  }

  .hero-content h1 {
    font-size: 2.5rem;
  }

  .hero-content p {
    font-size: 1.125rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .workflow-grid,
  .features-grid,
  .education-grid {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .workflow-grid,
  .features-grid,
  .education-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1440px) {
  .container {
    max-width: 1400px;
  }
}