/* ==========================================================================
   Design System & Global Variables
   Domain: https://spotifypremiumapks.info/
   Font: Helvetica, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif
   ========================================================================== */

:root {
  --color-bg-primary: #0b0f19;
  --color-bg-secondary: #111827;
  --color-bg-card: #161f30;
  --color-bg-card-hover: #1e293b;
  --color-bg-subtle: #1f2937;
  --color-accent: #1db954;
  --color-accent-hover: #1ed760;
  --color-accent-glow: rgba(29, 185, 84, 0.18);
  --color-emerald: #10b981;
  --color-text-primary: #f9fafb;
  --color-text-secondary: #d1d5db;
  --color-text-muted: #9ca3af;
  --color-text-subtle: #6b7280;
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-hover: rgba(29, 185, 84, 0.4);
  --color-danger: #ef4444;
  --color-warning: #f59e0b;
  --color-success: #10b981;
  
  --font-main: "Helvetica Neue", Helvetica, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 28px var(--color-accent-glow);
  
  --container-max: 1200px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

html {
  font-family: var(--font-main);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.65;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

li {
  margin-bottom: 0.5rem;
  color: var(--color-text-secondary);
}

p {
  margin-bottom: 1.25rem;
  color: var(--color-text-secondary);
  font-size: 1.05rem;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-primary);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.85rem; margin-top: 2.2rem; }
h3 { font-size: 1.4rem; margin-top: 1.7rem; }
h4 { font-size: 1.15rem; margin-top: 1.2rem; }

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(11, 15, 25, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-fast);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo img {
  height: 44px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.35rem;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  padding: 0.4rem 0.2rem;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* 6-Language Selector */
.lang-selector-wrapper {
  position: relative;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  padding: 0.45rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.lang-btn:hover {
  border-color: var(--color-accent);
}

.lang-dropdown {
  position: absolute;
  top: 120%;
  right: 0;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  min-width: 150px;
  box-shadow: var(--shadow-md);
  list-style: none;
  padding: 0.4rem 0;
  margin: 0;
  display: none;
  z-index: 1010;
}

.lang-dropdown.show {
  display: block;
}

.lang-item a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1rem;
  color: var(--color-text-secondary);
  font-size: 0.88rem;
}

.lang-item a:hover {
  background: var(--color-bg-subtle);
  color: var(--color-accent);
}

.btn-header-cta {
  background: var(--color-accent);
  color: #000;
  font-weight: 700;
  font-size: 0.88rem;
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}

.btn-header-cta:hover {
  background: var(--color-accent-hover);
  color: #000;
  transform: translateY(-1px);
}

.hamburger-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.4rem;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero-section {
  position: relative;
  padding: 4.5rem 0 3.5rem;
  background: radial-gradient(circle at 75% 20%, rgba(29, 185, 84, 0.12) 0%, rgba(11, 15, 25, 0) 65%);
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(29, 185, 84, 0.12);
  border: 1px solid rgba(29, 185, 84, 0.35);
  color: var(--color-accent);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 2.85rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}

.hero-title span {
  color: var(--color-accent);
}

.hero-description {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 2rem;
  max-width: 620px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--color-accent);
  color: #000 !important;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 20px rgba(29, 185, 84, 0.4);
  transition: all var(--transition-fast);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(29, 185, 84, 0.6);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--color-bg-secondary);
  color: var(--color-text-primary) !important;
  font-weight: 600;
  font-size: 1.05rem;
  padding: 0.85rem 1.8rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background-color: var(--color-bg-subtle);
  border-color: var(--color-text-muted);
  transform: translateY(-2px);
}

.hero-trust-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.trust-item svg {
  color: var(--color-accent);
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-visual img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border: 1px solid var(--color-border);
  width: 100%;
  max-width: 480px;
  object-fit: cover;
}

/* ==========================================================================
   Quick Specifications Table & Cards
   ========================================================================== */

.spec-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  margin: 2.5rem 0;
  box-shadow: var(--shadow-sm);
}

.spec-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.spec-item {
  background: var(--color-bg-secondary);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.spec-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 0.35rem;
}

.spec-value {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.spec-value.highlight {
  color: var(--color-accent);
}

/* ==========================================================================
   Content Sections & Typography Formatting
   ========================================================================== */

.section {
  padding: 3.5rem 0;
}

.section-bg {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-header {
  margin-bottom: 2.5rem;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 700px;
}

/* Feature Cards Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.75rem;
}

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.85rem;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(29, 185, 84, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--color-accent);
}

.feature-icon-wrapper svg {
  width: 26px;
  height: 26px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.feature-text {
  font-size: 0.98rem;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* ==========================================================================
   Comparison Tables
   ========================================================================== */

.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 2rem 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-bg-card);
  text-align: left;
  font-size: 0.98rem;
}

.comparison-table th {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  padding: 1.1rem 1.4rem;
  font-weight: 700;
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}

.comparison-table td {
  padding: 1rem 1.4rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.comparison-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.badge-yes {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--color-accent);
  font-weight: 600;
}

.badge-no {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--color-danger);
  font-weight: 600;
}

.badge-warn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--color-warning);
  font-weight: 600;
}

/* ==========================================================================
   Installation Guides (Tabs & Timeline)
   ========================================================================== */

.guide-step-card {
  display: flex;
  gap: 1.5rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  margin-bottom: 1.25rem;
  align-items: flex-start;
}

.step-number {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #000;
  font-weight: 800;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-content h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
}

.step-content p {
  margin-bottom: 0;
}

/* Pros and Cons Boxes */
.pros-cons-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin: 2.5rem 0;
}

.pros-box, .cons-box {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: 2rem;
  border: 1px solid var(--color-border);
}

.pros-box {
  border-top: 4px solid var(--color-accent);
}

.cons-box {
  border-top: 4px solid var(--color-danger);
}

.pros-box h3, .cons-box h3 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0;
}

.pros-list li::marker {
  color: var(--color-accent);
}

.cons-list li::marker {
  color: var(--color-danger);
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */

.faq-container {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: var(--color-border-hover);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 1.35rem 1.6rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-question:hover {
  color: var(--color-accent);
}

.faq-icon {
  font-size: 1.4rem;
  transition: transform var(--transition-fast);
  color: var(--color-accent);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  padding: 0 1.6rem;
}

.faq-item.active .faq-answer {
  max-height: 600px;
  padding-bottom: 1.5rem;
  transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Blog Cards & Grid
   ========================================================================== */

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

.blog-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.blog-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-md);
}

.blog-card-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--color-bg-subtle);
  overflow: hidden;
}

.blog-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.blog-card:hover .blog-card-thumb img {
  transform: scale(1.04);
}

.blog-card-content {
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.blog-card-category {
  color: var(--color-accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.blog-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.75rem;
}

.blog-card-title a {
  color: var(--color-text-primary);
}

.blog-card-title a:hover {
  color: var(--color-accent);
}

.blog-card-excerpt {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.blog-card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-accent);
}

.blog-card-link:hover {
  color: var(--color-accent-hover);
}

/* Single Article Layout */
.article-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.article-header {
  margin-bottom: 2.5rem;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.breadcrumbs a {
  color: var(--color-text-muted);
}

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

.breadcrumbs span.separator {
  color: var(--color-text-subtle);
}

.article-title {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.25rem;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  padding: 1rem 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.article-featured-image {
  margin: 2rem 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.article-content {
  font-size: 1.08rem;
  line-height: 1.75;
}

.article-content h2 {
  font-size: 1.85rem;
  margin-top: 2.75rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.5rem;
}

.article-content h3 {
  font-size: 1.35rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.article-author-box {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  margin: 3rem 0;
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.author-avatar {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #000;
  font-weight: 800;
  font-size: 1.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.author-details h4 {
  margin: 0 0 0.35rem 0;
  font-size: 1.15rem;
}

.author-details p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

/* Alert Boxes (Notes, Warnings) */
.alert-box {
  background: var(--color-bg-card);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
  font-size: 0.98rem;
}

.alert-box.warning {
  border-left-color: var(--color-warning);
  background: rgba(245, 158, 11, 0.08);
}

.alert-box.danger {
  border-left-color: var(--color-danger);
  background: rgba(239, 68, 68, 0.08);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background: #070a11;
  border-top: 1px solid var(--color-border);
  padding: 4.5rem 0 2rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  margin-top: 1rem;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--color-text-primary);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 0.65rem;
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  font-size: 0.88rem;
  color: var(--color-text-subtle);
  gap: 1rem;
}

.footer-disclaimer-text {
  font-size: 0.82rem;
  color: var(--color-text-subtle);
  line-height: 1.5;
  margin-bottom: 1rem;
}