/* ==========================================================================
   ALPHA DELVING — PORTFOLIO PAGE STYLES (TOKEN 8)
   Lumina Light Design System
   ========================================================================== */

/* 1. Portfolio Hero Banner */
.portfolio-hero {
  padding: 8rem 0 3.5rem 0;
  background: linear-gradient(180deg, var(--color-surface-pure) 0%, var(--color-surface-container) 100%);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.portfolio-hero-content {
  max-width: 860px;
  margin: 0 auto;
}

.portfolio-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 4.8vw, 3.8rem);
  font-weight: 900;
  color: var(--color-brand-navy);
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 1rem 0 1.25rem 0;
}

.portfolio-hero p {
  font-size: 17px;
  color: var(--color-brand-neutral);
  line-height: 1.6;
  max-width: 720px;
  margin: 0 auto 2.5rem auto;
}

/* Hero Stats Strip */
.portfolio-stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-top: 1rem;
}

.portfolio-stat-item {
  background: #ffffff;
  border: 1px solid var(--color-border-subtle);
  border-radius: 16px;
  padding: 1.25rem 1rem;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.04);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.portfolio-stat-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px -4px rgba(0, 160, 233, 0.15);
  border-color: rgba(0, 160, 233, 0.35);
}

.portfolio-stat-number {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 2.5vw, 2.25rem);
  font-weight: 900;
  color: var(--color-brand-cyan);
  line-height: 1.1;
  margin-bottom: 0.35rem;
}

.portfolio-stat-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-brand-navy);
}

.portfolio-stat-sub {
  font-size: 11.5px;
  color: var(--color-brand-neutral);
  margin-top: 2px;
}

/* 2. Featured Case Study Spotlight Section (Automotive ₹10K -> 4 Sales) */
.featured-case-section {
  padding: 3.5rem 0 4.5rem 0;
  background-color: var(--color-surface-container);
  position: relative;
}

.featured-case-card {
  background: #ffffff;
  border-radius: 28px;
  border: 1.5px solid rgba(0, 160, 233, 0.25);
  box-shadow: 0 12px 36px -6px rgba(15, 23, 42, 0.08), 0 0 24px rgba(0, 160, 233, 0.06);
  padding: 3rem;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.featured-case-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 160, 233, 0.08);
  border: 1px solid rgba(0, 160, 233, 0.22);
  color: var(--color-brand-cyan);
  font-family: var(--font-display);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 1.25rem;
}

.pulse-dot-cyan {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-brand-cyan);
  box-shadow: 0 0 0 0 rgba(0, 160, 233, 0.6);
  animation: pulseCyan 2s infinite;
}

@keyframes pulseCyan {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 160, 233, 0.6); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(0, 160, 233, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 160, 233, 0); }
}

.featured-case-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 2.8vw, 2.5rem);
  font-weight: 800;
  color: var(--color-brand-navy);
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 1rem;
}

.featured-case-desc {
  font-size: 15px;
  color: var(--color-brand-neutral);
  line-height: 1.65;
  margin-bottom: 1.75rem;
}

.featured-case-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  background: var(--color-surface-container);
  border: 1px solid var(--color-border-subtle);
  border-radius: 16px;
  padding: 1.25rem;
  margin-bottom: 2rem;
}

.featured-metric-item {
  text-align: left;
}

.featured-metric-value {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  color: var(--color-brand-navy);
  line-height: 1.2;
}

.featured-metric-label {
  font-size: 12px;
  color: var(--color-brand-neutral);
  margin-top: 3px;
}

.featured-case-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Featured Case Dashboard Visual */
.featured-case-visual {
  background: linear-gradient(145deg, #0F172A 0%, #1E293B 100%);
  border-radius: 20px;
  padding: 2rem;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.35);
  position: relative;
  overflow: hidden;
}

.case-visual-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 1.5rem;
}

.case-visual-badge {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-brand-cyan);
  background: rgba(0, 160, 233, 0.15);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.case-visual-status {
  font-size: 12px;
  color: #94A3B8;
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-dot-green {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10B981;
}

/* Funnel Stages */
.funnel-steps {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.funnel-step {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 0.85rem 1.15rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.funnel-step:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateX(4px);
}

.funnel-step.highlight {
  background: rgba(0, 160, 233, 0.12);
  border-color: rgba(0, 160, 233, 0.35);
}

.step-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.step-num {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  color: var(--color-brand-cyan);
  background: rgba(0, 160, 233, 0.15);
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-name {
  font-size: 13px;
  font-weight: 600;
  color: #E2E8F0;
}

.step-metric {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-brand-cyan);
}

.case-brands-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.case-brands-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #64748B;
  font-weight: 600;
}

.case-brand-logos {
  display: flex;
  gap: 12px;
  align-items: center;
}

.case-brand-logos img {
  height: 18px;
  width: auto;
  object-fit: contain;
  opacity: 0.75;
  filter: brightness(0) invert(1);
  transition: opacity var(--transition-fast);
}

.case-brand-logos img:hover {
  opacity: 1;
}

/* 3. Portfolio Filter Bar */
.portfolio-filter-section {
  padding: 4.5rem 0 2rem 0;
  background-color: var(--color-surface-pure);
  text-align: center;
}

.portfolio-filter-heading {
  max-width: 650px;
  margin: 0 auto 2rem auto;
}

.portfolio-filter-heading h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  color: var(--color-brand-navy);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.portfolio-filter-heading p {
  font-size: 15px;
  color: var(--color-brand-neutral);
}

.filter-chips-container {
  display: inline-flex;
  background: #ffffff;
  padding: 6px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-subtle);
  box-shadow: 0 4px 18px rgba(15, 23, 42, 0.05);
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
  max-width: 950px;
  margin: 0 auto;
}

.portfolio-chip {
  background: transparent;
  border: none;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-brand-neutral);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  outline: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.portfolio-chip:hover:not(.active) {
  color: var(--color-brand-navy);
  background: rgba(0, 160, 233, 0.06);
}

.portfolio-chip.active {
  background: var(--color-brand-navy);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
}

.chip-count {
  font-size: 11px;
  background: rgba(0, 160, 233, 0.12);
  color: var(--color-brand-cyan);
  padding: 2px 7px;
  border-radius: var(--radius-full);
  font-weight: 700;
}

.portfolio-chip.active .chip-count {
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

/* 4. Projects Grid */
.projects-grid-section {
  padding: 2rem 0 6rem 0;
  background-color: var(--color-surface-pure);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.project-card {
  background: #ffffff;
  border: 1px solid var(--color-border-subtle);
  border-radius: 22px;
  padding: 2rem;
  box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.04);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.35s ease,
              opacity 0.25s ease;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 160, 233, 0.45);
  box-shadow: 0 20px 40px -10px rgba(0, 160, 233, 0.16);
}

.project-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.project-category-badge {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-brand-cyan);
  background: rgba(0, 160, 233, 0.08);
  border: 1px solid rgba(0, 160, 233, 0.2);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.project-partner-logo {
  height: 24px;
  max-width: 60px;
  object-fit: contain;
}

.project-title {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  color: var(--color-brand-navy);
  letter-spacing: -0.01em;
  margin-bottom: 0.6rem;
  line-height: 1.3;
}

.project-desc {
  font-size: 14px;
  color: var(--color-brand-neutral);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

/* Metric Callout Highlight */
.project-metric-box {
  background: var(--color-surface-container);
  border: 1px solid var(--color-border-subtle);
  border-radius: 14px;
  padding: 1rem 1.15rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 12px;
}

.project-metric-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(0, 160, 233, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-brand-cyan);
  flex-shrink: 0;
}

.project-metric-icon svg {
  width: 18px;
  height: 18px;
}

.project-metric-info {
  display: flex;
  flex-direction: column;
}

.project-metric-number {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  color: var(--color-brand-navy);
  line-height: 1.2;
}

.project-metric-label {
  font-size: 11.5px;
  color: var(--color-brand-neutral);
}

/* Deliverable Tech Tags */
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 1.5rem;
}

.project-tag {
  font-size: 11.5px;
  font-weight: 500;
  color: #475569;
  background: #F1F5F9;
  padding: 3px 9px;
  border-radius: 6px;
}

/* Card Action Footer */
.project-card-footer {
  margin-top: auto;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.project-link {
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--color-brand-cyan);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.project-link:hover {
  color: var(--color-brand-sky);
  gap: 9px;
}

/* Empty State Message */
.portfolio-empty-state {
  display: none;
  text-align: center;
  padding: 4rem 1rem;
  grid-column: 1 / -1;
}

.portfolio-empty-state.show {
  display: block;
}

.portfolio-empty-state h3 {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--color-brand-navy);
  margin-bottom: 0.5rem;
}

.portfolio-empty-state p {
  color: var(--color-brand-neutral);
  font-size: 14px;
}

/* 5. Responsive Design */
@media (max-width: 1024px) {
  .portfolio-hero {
    padding: 6.5rem 0 3.5rem 0;
  }

  .portfolio-hero h1 {
    font-size: clamp(2rem, 4vw, 3rem);
  }

  .portfolio-stats-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }

  .featured-case-card {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 2.25rem;
  }

  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

@media (max-width: 767px) {
  .portfolio-hero {
    padding: 5.5rem 0 2rem 0;
  }

  .portfolio-hero h1 {
    font-size: clamp(1.65rem, 6vw, 2.25rem);
    line-height: 1.2;
    margin: 0.75rem 0 1rem 0;
  }

  .portfolio-hero p {
    font-size: 14.5px;
    margin-bottom: 1.5rem;
  }

  .portfolio-stats-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }

  .portfolio-stat-item {
    padding: 1rem 0.85rem;
  }

  .portfolio-stat-number {
    font-size: clamp(1.5rem, 5vw, 1.85rem);
  }

  .portfolio-stat-label {
    font-size: 12px;
  }

  .featured-case-section {
    padding: 2.5rem 0 3.5rem 0;
  }

  .featured-case-card {
    padding: 1.35rem 1.15rem;
    border-radius: var(--radius-xl);
    gap: 1.5rem;
  }

  .featured-case-title {
    font-size: clamp(1.4rem, 5.5vw, 1.85rem);
    margin-bottom: 0.75rem;
  }

  .featured-case-desc {
    font-size: 13.5px;
    margin-bottom: 1.25rem;
  }

  .featured-case-metrics {
    grid-template-columns: 1fr;
    gap: 0.65rem;
    padding: 0.85rem;
    margin-bottom: 1.5rem;
  }

  .featured-case-actions {
    flex-direction: column;
    width: 100%;
  }

  .featured-case-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .featured-case-visual {
    padding: 1.25rem 1rem;
    border-radius: 16px;
  }

  .portfolio-filter-section {
    padding: 2.5rem 0 1.5rem 0;
  }

  .filter-chips-container {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    max-width: 100%;
    justify-content: flex-start;
    padding: 4px;
    gap: 6px;
    scrollbar-width: none;
    border-radius: var(--radius-full);
  }

  .filter-chips-container::-webkit-scrollbar {
    display: none;
  }

  .portfolio-chip {
    padding: 7px 15px;
    font-size: 12px;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .projects-grid-section {
    padding: 1.5rem 0 4rem 0;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .project-card {
    padding: 1.35rem 1.15rem;
    border-radius: 18px;
  }

  .project-title {
    font-size: 17.5px;
  }

  .project-desc {
    font-size: 13.5px;
    margin-bottom: 1.25rem;
  }

  .project-metric-box {
    padding: 0.85rem 1rem;
    margin-bottom: 1.25rem;
  }
}

@media (max-width: 480px) {
  .portfolio-stats-strip {
    grid-template-columns: 1fr;
  }
}