/* ==========================================================================
   SKILL DEEP-DIVE IMMERSIVE MODAL SYSTEM
   High-end interactive technical explanation layer for Syed Hamza Resume
   ========================================================================== */

/* Modal Backdrop Overlay */
.skill-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(12, 16, 23, 0.65);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

.skill-modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

/* Modal Window Container */
.skill-modal-container {
  background: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 24px;
  box-shadow: 
    0 30px 90px -15px rgba(0, 0, 0, 0.35),
    0 10px 30px rgba(0, 0, 0, 0.15),
    inset 0 1px 1px rgba(255, 255, 255, 0.9);
  max-width: 880px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.94) translateY(20px);
  transition: transform 0.32s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
}

.skill-modal-backdrop.active .skill-modal-container {
  transform: scale(1) translateY(0);
}

/* Modal Top Header */
.skill-modal-header {
  padding: 22px 28px 16px;
  background: linear-gradient(180deg, #fbfcfe 0%, #f4f6fa 100%);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-shrink: 0;
  position: relative;
}

.skill-modal-header-left {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.skill-modal-badges-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.skill-category-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--accent-gold-dark);
  background: var(--active-nav-bg);
  border: 1px solid var(--active-nav-border);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}

.skill-depth-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  color: #15803d;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.skill-depth-badge::before {
  content: "●";
  color: #22c55e;
}

.skill-modal-title {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-title);
  letter-spacing: -0.03em;
  line-height: 1.1;
  display: flex;
  align-items: center;
  gap: 10px;
}

.skill-modal-summary {
  font-size: 0.88rem;
  color: var(--text-body);
  font-weight: 500;
}

.skill-modal-close-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  color: var(--text-title);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  transition: all var(--spring-bounce);
  flex-shrink: 0;
}

.skill-modal-close-btn:hover {
  background: var(--surface-dark);
  color: #ffffff;
  transform: rotate(90deg) scale(1.08);
}

/* Modal Scrollable Body */
.skill-modal-body {
  padding: 28px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* Deep Dive Section Block */
.deep-dive-section {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.section-num-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--accent-gold-dark);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-num-tag::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border-subtle);
}

.section-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-title);
  letter-spacing: -0.02em;
}

/* 01. Progressive Disclosure (What is it?) */
.disclosure-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.disclosure-card {
  background: var(--surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all var(--spring-bounce);
}

.disclosure-card:hover {
  background: #ffffff;
  border-color: rgba(194, 149, 56, 0.3);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04);
}

.disclosure-level-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 800;
  color: var(--accent-gold-dark);
  display: flex;
  align-items: center;
  gap: 5px;
}

.disclosure-text {
  font-size: 0.82rem;
  color: var(--text-body);
  line-height: 1.55;
}

/* 02. Interactive How-It-Works Flow & Simulator */
.flow-simulator-box {
  background: #0d1117;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  padding: 20px;
  color: #ffffff;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.flow-sim-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.flow-sim-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: #f1f5f9;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-flow-play {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-gold-grad);
  color: #0f131a;
  border: none;
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-size: 0.76rem;
  font-weight: 800;
  cursor: pointer;
  transition: all var(--spring-bounce);
  box-shadow: 0 2px 10px rgba(194, 149, 56, 0.35);
}

.btn-flow-play:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 16px rgba(194, 149, 56, 0.55);
}

.flow-nodes-track {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 4px 14px;
  scrollbar-width: thin;
}

.flow-node-item {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-width: 120px;
  flex-shrink: 0;
  transition: all 0.3s ease;
  position: relative;
}

.flow-node-item.active {
  background: rgba(194, 149, 56, 0.18);
  border-color: var(--accent-gold);
  box-shadow: 0 0 16px rgba(194, 149, 56, 0.4);
  transform: translateY(-3px) scale(1.04);
}

.flow-node-step {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  color: #94a3b8;
}

.flow-node-name {
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 700;
  color: #ffffff;
  margin-top: 2px;
}

.flow-arrow-sep {
  color: #64748b;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.flow-steps-accordion {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 8px;
}

.flow-step-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 0.78rem;
  color: #cbd5e1;
  line-height: 1.45;
}

.flow-step-card strong {
  color: var(--accent-gold-light);
  display: block;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  margin-bottom: 2px;
}

/* 03. Interactive Code Sandbox */
.code-sandbox-box {
  background: #0f141c;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.code-sandbox-header {
  background: #181f2a;
  padding: 8px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.code-window-dots {
  display: flex;
  gap: 6px;
}

.code-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #22c55e; }

.code-lang-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: #94a3b8;
}

.code-snippet-pre {
  padding: 16px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.5;
  color: #e2e8f0;
  overflow-x: auto;
  background: #0a0d14;
}

.code-interactive-runner {
  background: #141b24;
  padding: 14px 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-code-run {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #22c55e;
  color: #0f172a;
  border: none;
  border-radius: 8px;
  padding: 6px 14px;
  font-size: 0.76rem;
  font-weight: 800;
  cursor: pointer;
  transition: all var(--spring-bounce);
}

.btn-code-run:hover {
  background: #4ade80;
  transform: scale(1.04);
}

.code-sandbox-output {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #38bdf8;
  background: rgba(0, 0, 0, 0.4);
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid rgba(56, 189, 248, 0.2);
}

/* 04. Problem Solved (Before vs After) */
.problem-comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.comparison-card {
  border-radius: 14px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.comparison-card.before {
  background: #fff5f5;
  border: 1px solid #fed7d7;
}

.comparison-card.after {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
}

.comparison-card-head {
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 6px;
}

.comparison-card.before .comparison-card-head { color: #dc2626; }
.comparison-card.after .comparison-card-head { color: #16a34a; }

.comparison-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.80rem;
  color: var(--text-body);
}

.comparison-list li {
  position: relative;
  padding-left: 14px;
}

.comparison-card.before li::before {
  content: "✕";
  position: absolute;
  left: 0;
  color: #dc2626;
  font-weight: bold;
}

.comparison-card.after li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #16a34a;
  font-weight: bold;
}

/* 05. Where I Used It (Project Mapping) */
.project-usage-box {
  background: var(--surface-elevated);
  border: 1px solid var(--border-gold);
  border-radius: 16px;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.proj-usage-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.proj-usage-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-title);
  display: flex;
  align-items: center;
  gap: 8px;
}

.proj-usage-text {
  font-size: 0.86rem;
  color: var(--text-body);
  line-height: 1.55;
}

/* 06. Decisions & Trade-offs */
.tradeoffs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.tradeoff-column {
  background: var(--surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tradeoff-heading {
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--text-title);
  display: flex;
  align-items: center;
  gap: 6px;
}

.tradeoff-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.80rem;
  color: var(--text-body);
}

.tradeoff-list li {
  position: relative;
  padding-left: 14px;
}

.tradeoff-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent-gold-dark);
  font-weight: bold;
}

/* 07. Interview Mode (Interactive Accordion) */
.interview-mode-box {
  background: linear-gradient(135deg, #181e28 0%, #0e1218 100%);
  border: 1px solid rgba(194, 149, 56, 0.3);
  border-radius: 18px;
  padding: 20px;
  color: #ffffff;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.interview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.interview-badge {
  font-family: var(--font-mono);
  font-size: 0.70rem;
  font-weight: 800;
  color: var(--accent-gold-light);
  background: rgba(194, 149, 56, 0.2);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-gold);
}

.interview-questions-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.interview-q-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  overflow: hidden;
  transition: all var(--spring-bounce);
}

.interview-q-trigger {
  width: 100%;
  padding: 12px 14px;
  background: transparent;
  border: none;
  color: #ffffff;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.interview-q-trigger:hover {
  background: rgba(255, 255, 255, 0.04);
}

.interview-q-answer {
  padding: 0 14px 14px;
  font-size: 0.80rem;
  color: #cbd5e1;
  line-height: 1.55;
  display: none;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.interview-q-item.open .interview-q-answer {
  display: block;
  animation: answerReveal 0.2s ease;
}

@keyframes answerReveal {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Related Skills Row */
.related-skills-box {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding-top: 8px;
  border-top: 1px solid var(--border-subtle);
}

.related-skill-chip {
  background: var(--surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  padding: 4px 12px;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--text-title);
  cursor: pointer;
  transition: all var(--spring-bounce);
}

.related-skill-chip:hover {
  background: var(--active-nav-bg);
  border-color: var(--accent-gold);
  color: var(--accent-gold-dark);
  transform: translateY(-2px);
}

/* Modal Bottom Footer */
.skill-modal-footer {
  padding: 16px 28px;
  background: #f8fafc;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
}

/* Pill Sparkle Indicator */
.expertise-chip {
  cursor: pointer;
  position: relative;
  user-select: none;
}

.pill-sparkle-dot {
  font-size: 0.70rem;
  opacity: 0.45;
  margin-left: 2px;
  transition: opacity 0.2s, transform 0.2s;
}

.expertise-chip:hover .pill-sparkle-dot {
  opacity: 1;
  transform: translate(2px, -2px);
  color: var(--accent-gold-dark);
}

/* Mobile Responsive Adjustments */
@media screen and (max-width: 900px) {
  .skill-modal-backdrop {
    padding: 0;
  }

  .skill-modal-container {
    max-width: 100vw;
    width: 100vw;
    max-height: 100vh;
    height: 100vh;
    border-radius: 0;
  }

  .skill-modal-header {
    padding: 16px 18px;
  }

  .skill-modal-title {
    font-size: 1.45rem;
  }

  .skill-modal-body {
    padding: 18px;
    gap: 22px;
  }

  .disclosure-grid,
  .problem-comparison-grid,
  .tradeoffs-grid {
    grid-template-columns: 1fr;
  }
}