/* DeathLAB Foundational Stack - Clean Modern Design */

/* ========== VARIABLES ========== */
:root {
  --death-black: #0B0B0C;
  --death-cyan: #6FE4FF;
  --death-cyan-hover: #BFEFFC;
  --death-cyan-dark: #0E2E36;
  --death-white: #FFFFFF;
  --death-gray-1: #1a1a1b;
  --death-gray-2: #2d2d2f;
  --death-gray-3: #3a3a3c;
  --death-gray-4: #BDBDBD;

  /* Legacy compatibility */
  --death-red: var(--death-cyan);
}

/* ========== BASE STYLES ========== */
.foundational-stack-page {
  background: var(--death-black);
  color: var(--death-white);
  min-height: 100vh;
}

.fs-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

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

.fs-cyan {
  color: var(--death-cyan);
}

.fs-red {
  color: var(--death-cyan);
}

/* ========== HERO SECTION ========== */
.fs-hero {
  padding: 80px 0 60px;
  text-align: center;
}

.fs-badge {
  display: inline-block;
  background: var(--death-cyan);
  color: #001015;
  padding: 8px 20px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 20px;
}

.fs-title {
  font-size: 48px;
  font-weight: 900;
  line-height: 1.2;
  margin: 0 0 20px 0;
  text-transform: uppercase;
  letter-spacing: -0.5px;
}

.fs-subtitle {
  font-size: 20px;
  color: var(--death-gray-4);
  margin: 0 auto 30px;
  max-width: 800px;
  font-weight: 300;
  line-height: 1.5;
}

.fs-description {
  max-width: 900px;
  margin: 0 auto 40px;
  color: var(--death-gray-4);
  font-size: 16px;
  line-height: 1.7;
}

.fs-description p {
  margin: 0 0 15px 0;
}

.fs-hero-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 30px;
}

/* ========== BUTTONS ========== */
.fs-btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  text-decoration: none;
  letter-spacing: 0.8px;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.fs-btn-primary {
  background: var(--death-cyan);
  color: #001015;
}

.fs-btn-primary:hover {
  background: var(--death-cyan-hover);
  color: #001015;
  text-decoration: none;
}

.fs-btn-outline {
  background: transparent;
  color: var(--death-white);
  border: 1px solid var(--death-gray-3);
}

.fs-btn-outline:hover {
  background: var(--death-gray-1);
  border-color: var(--death-gray-4);
  color: var(--death-white);
  text-decoration: none;
}

.fs-btn-lg {
  padding: 18px 40px;
  font-size: 16px;
}

/* ========== PRODUCTS SECTION ========== */
.fs-products-section {
  padding: 60px 0;
  background: var(--death-gray-1);
}

.fs-section-header {
  text-align: center;
  margin-bottom: 40px;
}

.fs-section-header h2 {
  font-size: 32px;
  font-weight: 700;
  margin: 0 0 10px 0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.fs-section-header p {
  font-size: 18px;
  color: var(--death-gray-4);
  margin: 0;
}

/* ========== FILTERS ========== */
.fs-filters {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.fs-filter {
  padding: 10px 20px;
  background: var(--death-gray-2);
  color: var(--death-gray-4);
  border: 1px solid var(--death-gray-3);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.fs-filter:hover {
  background: var(--death-gray-3);
  color: var(--death-white);
}

.fs-filter.active {
  background: var(--death-cyan);
  color: #001015;
  border-color: var(--death-cyan);
}

/* ========== PRODUCTS GRID ========== */
.fs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.fs-product {
  background: var(--death-gray-2);
  border: 1px solid var(--death-gray-3);
  padding: 30px;
  position: relative;
  transition: all 0.3s ease;
}

/* CLEAN HOVER - NO RED BACKGROUND */
.fs-product:hover {
  border-color: var(--death-gray-4);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.5);
}

.fs-product.hidden {
  display: none;
}

.fs-product-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--death-cyan);
  color: #001015;
  padding: 5px 12px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.fs-badge-gray {
  background: var(--death-gray-4);
  color: var(--death-black);
}

.fs-product-icon {
  font-size: 50px;
  margin-bottom: 20px;
  text-align: center;
}

.fs-product h3 {
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 8px 0;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.fs-product-type {
  color: var(--death-cyan);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 0 0 15px 0;
}

.fs-product-desc {
  color: var(--death-gray-4);
  font-size: 15px;
  line-height: 1.6;
  margin: 0 0 20px 0;
}

.fs-mechanisms {
  background: var(--death-black);
  border-left: 2px solid var(--death-cyan);
  padding: 15px;
  margin-bottom: 20px;
}

.fs-mech-item {
  color: var(--death-gray-4);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 10px;
}

.fs-mech-item:last-child {
  margin-bottom: 0;
}

.fs-mech-item strong {
  color: var(--death-white);
  font-weight: 600;
}

.fs-outcome {
  background: rgba(111, 228, 255, 0.1);
  border: 1px solid rgba(111, 228, 255, 0.3);
  padding: 12px 15px;
  margin-bottom: 12px;
  font-size: 14px;
  line-height: 1.6;
}

.fs-outcome strong {
  color: var(--death-cyan);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.fs-protocol {
  background: var(--death-black);
  border: 1px solid var(--death-gray-3);
  padding: 12px 15px;
  margin-bottom: 20px;
  font-size: 13px;
  font-family: 'Courier New', monospace;
  color: var(--death-gray-4);
}

.fs-protocol strong {
  color: var(--death-white);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.fs-product-btn {
  display: block;
  width: 100%;
  padding: 14px 24px;
  background: var(--death-cyan);
  color: #001015;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  text-decoration: none;
  letter-spacing: 0.8px;
  transition: all 0.2s ease;
}

.fs-product-btn:hover {
  background: var(--death-cyan-hover);
  color: #001015;
  text-decoration: none;
}

/* ========== DAILY SEQUENCE ========== */
.fs-sequence-section {
  padding: 60px 0;
  background: var(--death-gray-2);
}

.fs-section-title {
  font-size: 36px;
  font-weight: 700;
  text-align: center;
  margin: 0 0 50px 0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.fs-sequence-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  max-width: 900px;
  margin: 0 auto;
}

.fs-sequence-card {
  background: var(--death-black);
  border: 1px solid var(--death-gray-3);
  padding: 30px;
  transition: all 0.3s ease;
}

.fs-sequence-card:hover {
  border-color: var(--death-gray-4);
  transform: translateY(-3px);
}

.fs-seq-icon {
  font-size: 40px;
  margin-bottom: 15px;
}

.fs-sequence-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 20px 0;
  text-transform: uppercase;
}

.fs-sequence-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.fs-sequence-card li {
  padding: 12px 0;
  border-bottom: 1px solid var(--death-gray-3);
  color: var(--death-gray-4);
  font-size: 15px;
}

.fs-sequence-card li:last-child {
  border-bottom: none;
}

.fs-sequence-card strong {
  color: var(--death-white);
  font-weight: 600;
}

/* ========== MECHANISMS ========== */
.fs-mechanisms-section {
  padding: 60px 0;
  background: var(--death-black);
}

.fs-mech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.fs-mech-card {
  background: var(--death-gray-2);
  border: 1px solid var(--death-gray-3);
  padding: 25px;
  text-align: center;
  transition: all 0.3s ease;
}

.fs-mech-card:hover {
  border-color: var(--death-gray-4);
  transform: translateY(-3px);
}

.fs-mech-icon {
  font-size: 36px;
  margin-bottom: 12px;
}

.fs-mech-card h4 {
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 8px 0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.fs-mech-card p {
  color: var(--death-gray-4);
  font-size: 14px;
  line-height: 1.5;
  margin: 0;
}

/* ========== PRINCIPLE ========== */
.fs-principle-section {
  padding: 60px 0;
  background: var(--death-gray-2);
}

.fs-principle-content {
  max-width: 800px;
  margin: 0 auto 40px;
}

.fs-principle-lead {
  font-size: 28px;
  font-weight: 600;
  color: var(--death-cyan);
  margin: 0 0 30px 0;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.fs-principle-content p {
  font-size: 18px;
  line-height: 1.7;
  color: var(--death-gray-4);
  margin: 0 0 20px 0;
}

.fs-principle-content strong {
  color: var(--death-white);
  font-weight: 600;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  .fs-title {
    font-size: 36px;
  }

  .fs-subtitle {
    font-size: 18px;
  }

  .fs-description {
    font-size: 15px;
  }

  .fs-hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .fs-btn {
    width: 100%;
    max-width: 300px;
  }

  .fs-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .fs-filters {
    flex-direction: column;
  }

  .fs-filter {
    width: 100%;
    text-align: center;
  }

  .fs-section-title {
    font-size: 28px;
  }

  .fs-principle-lead {
    font-size: 22px;
  }

  .fs-principle-content p {
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  .fs-hero {
    padding: 50px 0 40px;
  }

  .fs-title {
    font-size: 28px;
  }

  .fs-product {
    padding: 20px;
  }

  .fs-sequence-card {
    padding: 20px;
  }

  .fs-mech-card {
    padding: 20px;
  }
}

/* ========== SMOOTH SCROLL ========== */
html {
  scroll-behavior: smooth;
}