* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Modern Color Palette */
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --navy: #0b2851;
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-900: #1e3a8a;

  /* Neutral Colors */
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  /* Semantic Colors */
  --success: #10b981;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --error: #ef4444;
  --error-light: #fee2e2;

  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-accent: #eff6ff;

  /* Text Colors */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #64748b;
  --text-inverse: #ffffff;

  /* Border & Shadow */
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;

  /* Typography */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

/* ===========================================
   BASE STYLES
   =========================================== */

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-secondary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===========================================
   LAYOUT CONTAINER
   =========================================== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 640px) {
  .container {
    padding: 0 var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-8);
  }
}

/* ===========================================
   HEADER - MODERN DESIGN
   =========================================== */

header {
  background: var(--navy);
  border-bottom: 1px solid rgba(255,255,255,0.12);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.header-content {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

@media (min-width: 640px) {
  .header-content {
    padding: 0 var(--space-6);
  }
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--font-size-lg);
  color: var(--text-inverse);
  text-decoration: none;
  transition: var(--transition-fast);
  flex-shrink: 0;
  max-width: 200px;
}

.logo:hover {
  color: var(--primary-400);
  transform: translateY(-1px);
}

.logo img {
  height: 28px;
  width: auto;
  flex-shrink: 0;
  object-fit: contain;
}

.logo span {
  white-space: nowrap;
}

.nav-buttons {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

/* ===========================================
   HERO SECTION
   =========================================== */

.hero {
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
  color: white;
  padding: var(--space-16) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.03"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.03"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.02"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  pointer-events: none;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl));
  font-weight: 800;
  margin-bottom: var(--space-4);
  line-height: 1.1;
  background: linear-gradient(135deg, white 0%, var(--gray-100) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--gray-200);
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
}

@media (min-width: 640px) {
  .hero-actions {
    flex-direction: row;
    justify-content: center;
  }
}

/* ===========================================
   MAIN CONTENT
   =========================================== */

.main-content {
  padding: var(--space-16) 0;
}

.section {
  margin-bottom: var(--space-20);
}

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

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

.section-eyebrow {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--primary-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
  padding: var(--space-1) var(--space-3);
  background: var(--primary-50);
  border-radius: var(--radius-full);
}

.section-title {
  font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-4xl));
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  line-height: 1.2;
}

.section-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ===========================================
   CARDS & COMPONENTS
   =========================================== */

.card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
  overflow: hidden;
}

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

.card-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-light);
}

.card-body {
  padding: var(--space-6);
}

.card-footer {
  padding: var(--space-6);
  border-top: 1px solid var(--border-light);
  background: var(--bg-tertiary);
}

/* ===========================================
   GRID SYSTEMS
   =========================================== */

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-cols-1 {
  grid-template-columns: repeat(1, minmax(0, 1fr));
}

.grid-cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-cols-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (min-width: 640px) {
  .grid-cols-sm-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-cols-sm-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 768px) {
  .grid-cols-md-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-cols-md-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .grid-cols-md-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .grid-cols-lg-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .grid-cols-lg-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ===========================================
   BUTTONS - MODERN DESIGN
   =========================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--primary);
  background: var(--primary);
  color: var(--text-inverse);
  cursor: pointer;
  transition: var(--transition-fast);
  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(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: var(--transition-normal);
}

.btn:hover::before {
  left: 100%;
}

.btn:hover:not(:disabled) {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary,
.btn.btn-primary,
.btn.primary,
.btn-ghost,
.btn.btn-ghost,
.btn.ghost {
  background: var(--primary);
  color: var(--text-inverse);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover,
.btn.btn-primary:hover,
.btn.primary:hover,
.btn-ghost:hover,
.btn.btn-ghost:hover,
.btn.ghost:hover {
  background: var(--primary-dark);
  color: var(--text-inverse);
  border-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

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

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

/* ===========================================
   FORM ELEMENTS
   =========================================== */

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

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  background: var(--bg-primary);
  transition: var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px var(--primary-100);
}

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

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
  background-position: right var(--space-3) center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: var(--space-10);
}

/* ===========================================
   DEVICES SECTION
   =========================================== */

.devices-section {
  background: var(--bg-primary);
}

.devices-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.device-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.device-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-500), var(--primary-600));
  opacity: 0;
  transition: var(--transition-normal);
}

.device-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-200);
}

.device-card:hover::before {
  opacity: 1;
}

.device-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-lg);
  background: var(--primary-50);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.device-icon .material-icons {
  font-size: 1.5rem;
  color: var(--primary-600);
}

.device-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.device-status {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  margin-bottom: var(--space-4);
}

.device-info {
  display: grid;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.device-info-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.device-actions {
  margin-top: var(--space-4);
  display: flex;
  gap: var(--space-3);
}

.devices-toolbar {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* ===========================================
   NEWS SECTION
   =========================================== */

.news-section {
  background: var(--bg-secondary);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
}

.news-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: var(--transition-normal);
}

.news-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-200);
}

.news-date {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  margin-bottom: var(--space-2);
  font-weight: 500;
}

.news-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  line-height: 1.4;
}

.news-content {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.news-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* ===========================================
   SHOP SECTION
   =========================================== */

.shop-section {
  background: var(--bg-primary);
}

.shop-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.shop-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.shop-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--success), var(--primary-500));
  opacity: 0;
  transition: var(--transition-normal);
}

.shop-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-200);
}

.shop-card:hover::before {
  opacity: 1;
}

.shop-card-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-lg);
  background: var(--primary-50);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.shop-card-icon .material-icons {
  font-size: 1.5rem;
  color: var(--primary-600);
}

.shop-card-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}

.shop-card-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-4);
  flex-grow: 1;
}

.shop-card-features {
  margin-bottom: var(--space-6);
}

.shop-card-features span {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  margin-bottom: var(--space-1);
}

.shop-card-features span::before {
  content: '✓';
  color: var(--success);
  margin-right: var(--space-2);
  font-weight: bold;
}

.shop-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-light);
}

.shop-price {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--text-primary);
}

.shop-price-currency {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--text-secondary);
}

/* ===========================================
   CART & CHECKOUT
   =========================================== */

.cart-panel {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
}

.cart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-light);
}

.cart-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
}

.cart-count {
  background: var(--error);
  color: white;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.cart-items {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.cart-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
}

.cart-item-info {
  flex: 1;
}

.cart-item-name {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.cart-item-price {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.cart-item-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.cart-summary {
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-6);
}

.cart-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.checkout-section {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.checkout-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.checkout-form {
  display: grid;
  gap: var(--space-4);
}

.checkout-form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .checkout-form-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.checkout-message {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.checkout-message.success {
  background: var(--success-light);
  color: var(--success);
  border: 1px solid var(--success);
}

.checkout-message.error {
  background: var(--error-light);
  color: var(--error);
  border: 1px solid var(--error);
}

/* ===========================================
   MODALS - MODERN DESIGN
   =========================================== */

.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  z-index: 50;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  animation: modalFadeIn 0.2s ease-out;
}

.modal.open {
  display: flex;
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.modal-content {
  background: var(--bg-primary);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  max-width: 90vw;
  max-height: 90vh;
  overflow: hidden;
  animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-secondary);
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-lg);
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--space-6);
  max-height: calc(90vh - 140px);
  overflow-y: auto;
}

.shop-modal .modal-content {
  max-width: 1000px;
  width: 100%;
}

/* ===========================================
   FOOTER
   =========================================== */

.footer {
  background: var(--navy);
  color: var(--gray-300);
  padding: var(--space-12) 0 var(--space-6);
  border-top: 1px solid rgba(255,255,255,0.12);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .footer-content {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

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

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--font-size-lg);
  color: white;
  text-decoration: none;
  flex-shrink: 0;
  max-width: 200px;
}

.footer-logo img {
  height: 28px;
  width: auto;
  flex-shrink: 0;
  object-fit: contain;
}

.footer-logo span {
  white-space: nowrap;
}

.footer-description {
  color: var(--gray-400);
  line-height: 1.6;
  max-width: 300px;
}

.footer-section h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: white;
  margin-bottom: var(--space-4);
}

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

.footer-link {
  color: var(--gray-400);
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-link:hover {
  color: var(--primary-400);
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-4) 0;
  border-top: 1px solid var(--gray-800);
  text-align: center;
  color: var(--gray-500);
  font-size: var(--font-size-sm);
}

.footer-bottom a {
  color: var(--gray-400);
  text-decoration: none;
}

.footer-bottom a:hover {
  color: var(--primary-400);
}

/* ===========================================
   UTILITIES
   =========================================== */

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

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

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

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

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.hidden {
  display: none !important;
}

.flex {
  display: flex;
}

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

.justify-between {
  justify-content: space-between;
}

.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

/* ===========================================
   ANIMATIONS & EFFECTS
   =========================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ===========================================
   RESPONSIVE DESIGN
   =========================================== */

@media (max-width: 640px) {
  .hero {
    padding: var(--space-12) 0;
  }

  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-lg);
  }

  .section {
    margin-bottom: var(--space-16);
  }

  .modal-body {
    padding: var(--space-4);
  }

  .shop-card-footer {
    flex-direction: column;
    gap: var(--space-3);
    align-items: stretch;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-3);
  }

  .header-content {
    padding: 0 var(--space-3);
  }

  .hero-content {
    padding: 0 var(--space-3);
  }

  .section-header {
    margin-bottom: var(--space-8);
  }

  .grid {
    gap: var(--space-4);
  }

  .btn {
    width: 100%;
  }

  .cart-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .cart-item-actions {
    width: 100%;
    justify-content: space-between;
  }
}

/* ===========================================
   ACCESSIBILITY
   =========================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles */
.btn:focus-visible,
.form-input:focus-visible,
.modal-close:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --border: var(--gray-600);
    --text-secondary: var(--gray-300);
  }
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--primary);
  cursor: pointer;
  transition: var(--transition-fast);
  position: relative;
  overflow: hidden;
  background: var(--primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.nav-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: var(--transition-normal);
}

.nav-btn:hover::before {
  left: 100%;
}

.nav-btn:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

/* Ensure subscribe button is also blue */
#subscribeBtn {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700)) !important;
  color: white !important;
  border-color: var(--primary-600) !important;
}

/* ───────── DEVICE GRID ───────── */
.devices-header {
  display: flex;
  justify-content: space-between;
  align-items: center;

  padding: 20px 20px 12px;
}

.devices-header h2 {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-2);
}

#devices {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;

  padding: 0 20px 20px;
}

.device-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);

  padding: 16px;
  box-shadow: var(--shadow-sm);

  transition: 0.2s ease;
}

.device-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ───────── NEWS ───────── */
.news-section {
  padding: 0 20px 24px;
}

.news-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);

  padding: 14px 16px;
  margin-bottom: 10px;

  box-shadow: var(--shadow-sm);
}

/* ───────── MODAL (FIXED + COMPLETE) ───────── */
.modal {
  display: none;
  position: fixed;
  inset: 0;

  background: rgba(0,0,0,0.8);
  backdrop-filter: blur(8px);

  align-items: center;
  justify-content: center;

  padding: 20px;
  z-index: 999;
}

.modal.open {
  display: flex;
}

.modal-content {
  width: 100%;
  max-width: 420px;

  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);

  overflow: hidden;
}

/* header */
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;

  padding: 14px 16px;
  border-bottom: 1px solid var(--border);

  font-weight: 600;
}

/* body */
.modal-body {
  padding: 16px;
  max-height: 60vh;
  overflow-y: auto;
}

.shop-modal {
  max-width: 940px;
}

.shop-modal .modal-content {
  background: #ffffff !important;
  color: var(--text-primary) !important;
  opacity: 1 !important;
  border: 1px solid rgba(226,232,240,0.95);
  box-shadow: 0 24px 80px rgba(15,23,42,0.16);
}

#shopModal.modal {
  background: rgba(248,250,252,0.92);
}

.hidden {
  display: none !important;
}

.cart-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  margin-left: 6px;
  border-radius: 999px;
  background: #e63946;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
}

.shop-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.shop-cart-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 18px;
}

.cart-item-list {
  display: grid;
  gap: 12px;
  margin-bottom: 18px;
}

.cart-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
}

.cart-item-actions button {
  min-width: 80px;
}

.cart-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  margin-bottom: 16px;
}

.shop-message {
  min-height: 18px;
  margin-bottom: 14px;
  color: var(--success);
  font-size: 0.95rem;
}

.empty-cart {
  color: var(--text-2);
  line-height: 1.6;
}

.shop-header {
  margin-bottom: 20px;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
}

.shop-header h3 {
  margin: 0 0 10px;
  font-size: 1.35rem;
  color: var(--text);
}

.shop-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.shop-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 260px;
}

.shop-card-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--text);
}

.shop-card-top .material-icons {
  font-size: 28px;
  color: var(--primary);
}

.shop-card p {
  margin: 0 0 12px;
  color: var(--text-2);
  line-height: 1.6;
}

.shop-card-features {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.shop-card-features span {
  display: block;
  color: var(--text-3);
}

.shop-card-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.shop-price {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.payment-section {
  border-top: 1px solid var(--border);
  padding-top: 18px;
}

.payment-section h4 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.payment-icons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.payment-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-3);
  font-size: 0.85rem;
}

.payment-note {
  margin: 0;
  color: var(--text-3);
  line-height: 1.6;
}

/* ───────── MOBILE-FIRST RESPONSIVE ───────── */

/* Mobile base styles (up to 767px) */
@media (max-width: 767px) {
  html, body {
    font-size: 14px;
  }

  header {
    height: 48px;
    padding: 0 12px;
  }

  header .left img {
    height: 28px;
  }

  header .center {
    font-size: 0.9rem;
  }

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

  .modal {
    padding: 10px;
  }

  .modal-content {
    max-width: none;
    width: 100%;
    border-radius: var(--radius);
  }

  .modal-body {
    padding: 12px;
    max-height: 70vh;
  }

  .shop-modal {
    max-width: none;
  }

  .shop-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .shop-card {
    min-height: auto;
    padding: 16px;
  }

  .shop-card-bottom {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .shop-card-bottom .btn {
    width: 100%;
  }

  .shop-controls {
    flex-direction: column;
    gap: 8px;
  }

  .shop-cart-panel {
    padding: 16px;
  }

  .cart-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .cart-item-actions {
    align-self: stretch;
    text-align: center;
  }

  .cart-item-actions button {
    width: 100%;
  }

  .payment-icons {
    justify-content: center;
  }

  .devices {
    padding: 0 12px 12px;
  }

  .device-card {
    padding: 12px;
  }

  .news-section {
    padding: 0 12px 16px;
  }

  .news-item {
    padding: 12px 14px;
  }
}

/* Tablet styles (768px and up) */
@media (min-width: 768px) {
  .shop-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }

  .shop-card-bottom {
    flex-direction: row;
    justify-content: space-between;
  }

  .shop-card-bottom .btn {
    width: auto;
  }

  .shop-controls {
    flex-direction: row;
    justify-content: space-between;
  }

  .cart-item {
    flex-direction: row;
    align-items: flex-start;
  }

  .cart-item-actions {
    align-self: auto;
  }

  .cart-item-actions button {
    width: auto;
  }
}

/* Desktop styles (1024px and up) */
@media (min-width: 1024px) {
  .modal-content {
    max-width: 940px;
  }

  .shop-modal {
    max-width: 940px;
  }
}

/* footer */
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;

  padding: 12px 16px;
  border-top: 1px solid var(--border);
  background: var(--surface-2);
}

/* close button */
.modal-close {
  cursor: pointer;
  font-size: 0;
  color: var(--text-2);
  border: none;
  background: transparent;
  padding: 4px;
  border-radius: 4px;
  transition: background 0.15s;
}

.modal-close:hover {
  background: var(--surface-3);
}

.modal-close .material-icons {
  font-size: 20px;
}

/* ───────── FORM ELEMENTS ───────── */
input,
select,
textarea {
  width: 100%;
  padding: 10px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  font-family: inherit;
  font-size: 14px;
  background: var(--bg-primary);
  color: var(--text-primary);
}

textarea {
  min-height: 140px;
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: var(--text-tertiary);
}

/* Honeypot field - hidden from users but visible to bots */
.hp-field {
  position: absolute;
  left: -10000px;
  top: -10000px;
  visibility: hidden;
  opacity: 0;
}

/* ───────── MODAL SECTIONS ───────── */
.modal-section {
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.modal-section:last-child {
  border-bottom: none;
}

.modal-section h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}
.msg-inbox-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.msg-tab {
  flex: 1;
  text-align: center;
  padding: 10px;

  font-size: 0.85rem;
  font-weight: 600;

  cursor: pointer;
  color: var(--text-secondary);
  background: var(--surface);
  transition: color 0.2s, background 0.2s, border-color 0.2s;

  border-bottom: 2px solid transparent;
}

.msg-tab:not(.active):hover {
  color: var(--text-primary);
  background: var(--surface-2);
}

.msg-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  background: var(--bg-primary);
}

.msg-panel {
  display: none;
}

.msg-panel.active {
  display: block;
}

.msg-list {
  max-height: 320px;
  overflow-y: auto;
}

.msg-entry {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  color: var(--text-primary);
  background: var(--bg-primary);
}

.msg-entry:hover {
  background: var(--surface-2);
}

.msg-entry.unread {
  background: var(--primary-50);
}

/* ───────── MESSAGE DETAIL ───────── */
.msg-detail,
.msg-detail-header,
.msg-detail-body {
  color: var(--text-primary);
}

.msg-detail {
  display: none;
}

.msg-detail.open {
  display: block;
}

.msg-detail-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}

.msg-detail-body {
  padding: 16px;
  line-height: 1.6;
}

/* ───────── SETUP TOGGLE ───────── */
.unit-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.unit-toggle input {
  display: none;
}

.unit-toggle label {
  flex: 1;
  padding: 10px;
  text-align: center;
  cursor: pointer;

  background: var(--surface-3);
}

.unit-toggle input:checked + label {
  background: var(--primary);
  color: #fff;
}

/* ───────── BADGES ───────── */
.msg-badge,
.device-type-badge {
  display: inline-block;
  min-width: 18px;
  height: 18px;
  padding: 0 6px;
  border-radius: 9px;
  background: var(--danger);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  text-align: center;
  line-height: 18px;
  margin-left: 4px;
}

.device-type-badge {
  background: var(--primary);
  font-size: 0.7rem;
  padding: 2px 6px;
  height: auto;
  min-width: auto;
  line-height: 1;
}

/* ───────── FORM STYLING ───────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
}

.password-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.password-wrap input {
  flex: 1;
  padding-right: 40px;
}

.toggle-password {
  position: absolute;
  right: 12px;
  cursor: pointer;
  color: var(--text-3);
  font-size: 20px;
  user-select: none;
  transition: color 0.2s;
}

.toggle-password:hover {
  color: var(--text);
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  cursor: pointer;
  margin: 12px 0;
}

.checkbox-row input[type="checkbox"] {
  width: auto;
  margin: 0;
  cursor: pointer;
}

.error-msg {
  font-size: 0.8rem;
  color: var(--danger);
  margin-top: 4px;
  min-height: 18px;
}

.form-links-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  font-size: 0.85rem;
}

.form-link {
  color: var(--primary);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.2s;
}

.form-link:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

@media (max-width: 480px) {
  header .center {
    font-size: 0.85rem;
  }

  header .left img {
    height: 28px !important;
  }

  #devices {
    grid-template-columns: 1fr 1fr;
  }
}

/* ───────── SHOPPING CART ───────── */
.shop-cart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.shop-cart-back {
  display: flex;
  align-items: center;
  gap: 4px;
  background: transparent;
  border: none;
  color: var(--primary);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0;
}

.shop-cart-back:hover {
  color: var(--primary-dark);
}

.shop-cart-back .material-icons {
  font-size: 20px;
}

.shop-cart-items {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 16px;
  max-height: 300px;
  overflow-y: auto;
}

.shop-cart-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--surface-2);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.shop-cart-item-info {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}

.shop-cart-item-info .material-icons {
  color: var(--primary);
  font-size: 32px;
}

.shop-cart-item-name {
  font-weight: 600;
  color: var(--text);
}

.shop-cart-item-price {
  font-size: 0.85rem;
  color: var(--text-3);
}

.shop-cart-item-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.qty-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  transition: all 0.2s;
}

.qty-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.qty-value {
  min-width: 20px;
  text-align: center;
  font-weight: 600;
}

.remove-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  color: var(--danger);
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.remove-btn:hover {
  border-color: var(--danger);
  background: rgba(230, 57, 70, 0.1);
}

.remove-btn .material-icons {
  font-size: 18px;
}

.shop-cart-item-total {
  font-weight: 700;
  color: var(--text);
  min-width: 80px;
  text-align: right;
}

.shop-cart-summary {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  background: var(--surface-2);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.shop-cart-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
}

.shop-cart-row.total {
  border-top: 1px solid var(--border);
  padding-top: 8px;
  font-weight: 700;
  font-size: 1rem;
}

.shop-cart-payment {
  margin-bottom: 16px;
}

.shop-cart-payment label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.payment-method-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.payment-method-pills .payment-pill {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-3);
  cursor: pointer;
  transition: all 0.2s;
}

.payment-method-pills .payment-pill:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.payment-method-pills .payment-pill.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.shop-header {
  margin-bottom: 24px;
}

.shop-header .eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-3);
  margin-bottom: 6px;
}

.shop-header h3 {
  margin: 0 0 8px;
  font-size: 1.5rem;
  color: var(--text);
}

.shop-header p {
  margin: 0;
  color: var(--text-2);
  line-height: 1.6;
}

.shop-checkout-section {
  margin: 16px 0;
  padding: 16px;
  background: var(--surface-2);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.shop-checkout-section h4 {
  margin: 0 0 12px;
  font-size: 0.95rem;
  color: var(--text);
}