/* ==========================================================================
   Sulthana Thazneem E. A. - High-End Developer Portfolio
   Components: Diagrams, Full-Stack Architecture, Projects, Skills, Modal
   ========================================================================== */

/* ==========================================================================
   Hero System Pipeline Diagram
   ========================================================================== */
.system-pipeline-wrapper {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 24px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.pipeline-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-subtle);
}

.pipeline-status {
  display: flex;
  align-items: center;
  gap: 10px;
}

.pulse-indicator {
  width: 8px;
  height: 8px;
  background-color: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: pulseDot 2s infinite;
}

.pipeline-status-text {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-primary);
}

.pipeline-meta {
  display: flex;
  align-items: center;
  gap: 14px;
}

.telemetry-chip {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.telemetry-chip strong {
  color: var(--accent-cyan);
}

.pipeline-canvas-container {
  width: 100%;
  overflow-x: auto;
  padding: 10px 0;
  -webkit-overflow-scrolling: touch;
}

.pipeline-svg {
  width: 100%;
  min-width: 780px;
  height: auto;
  display: block;
}

.pipeline-node {
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.pipeline-node:hover {
  transform: translateY(-3px);
}

.pipeline-node:hover .node-rect {
  stroke: var(--accent-cyan);
}

/* Packet Pulses along connecting buses */
@keyframes packetFlow {
  0% { transform: translateX(0); opacity: 0; }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { transform: translateX(70px); opacity: 0; }
}

.packet-dot.dot-1 {
  animation: packetFlow 2.4s infinite cubic-bezier(0.4, 0, 0.2, 1);
}

.packet-dot.dot-2 {
  animation: packetFlow 2.4s infinite cubic-bezier(0.4, 0, 0.2, 1) 0.8s;
}

.packet-dot.dot-3 {
  animation: packetFlow 2.4s infinite cubic-bezier(0.4, 0, 0.2, 1) 1.6s;
}

.pipeline-legend {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.legend-node {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-cyan);
}

.legend-arrow {
  color: var(--text-faint);
}

/* ==========================================================================
   Full-Stack Development Section
   ========================================================================== */
.fullstack-architecture-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.fs-tier-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 24px;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.fs-tier-card:hover {
  border-color: var(--accent-cyan-border);
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.fs-tier-number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.fs-tier-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.fs-tier-role {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.fs-tier-techs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}

.fs-tier-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 18px;
  flex-grow: 1;
}

.fs-tier-deliverables {
  list-style: none;
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
}

.fs-tier-deliverables li {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.fs-tier-deliverables li::before {
  content: '▸';
  color: var(--accent-cyan);
}

/* Fullstack Statement Callout */
.fullstack-statement-banner {
  background: linear-gradient(180deg, var(--bg-surface-elevated) 0%, var(--bg-surface) 100%);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-cyan);
  border-radius: var(--card-radius);
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.statement-text {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.statement-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
  white-space: nowrap;
  background-color: var(--accent-cyan-dim);
  border: 1px solid var(--accent-cyan-border);
  padding: 6px 14px;
  border-radius: 20px;
}

/* ==========================================================================
   Technical Skills Section
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.skill-category-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 26px;
  transition: all var(--transition-fast);
}

.skill-category-card:hover {
  border-color: var(--border-active);
  transform: translateY(-2px);
}

.skill-card-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  margin-bottom: 8px;
}

.skill-category-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.skill-category-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 20px;
  min-height: 48px;
}

.skill-chips-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-pill {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 5px 11px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: 5px;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.skill-pill:hover {
  border-color: var(--accent-cyan);
  color: var(--text-primary);
  background-color: var(--bg-surface-hover);
}

/* ==========================================================================
   Projects Section
   ========================================================================== */
/* Project Filter Bar */
.projects-filter-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 6px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
}

.filter-btn.active {
  background-color: var(--accent-cyan-dim);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  font-weight: 700;
}

/* Project Cards Grid */
.projects-grid {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.project-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  overflow: hidden;
  transition: all var(--transition-normal);
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
}

.project-card:hover {
  border-color: var(--border-active);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.45);
}

.project-card-main {
  padding: 36px;
  display: flex;
  flex-direction: column;
}

.project-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.project-number {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-cyan);
  letter-spacing: 0.08em;
}

.project-type-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 4px 10px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-secondary);
}

.project-title {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.project-summary {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.project-detail-block {
  margin-bottom: 20px;
}

.detail-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
  display: block;
}

.detail-body {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.project-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
}

.project-card-visual {
  background-color: #0b0e15;
  border-left: 1px solid var(--border-color);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* Diagram Container inside Project Card */
.project-diagram-box {
  width: 100%;
}

.diagram-title-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.diagram-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.diagram-indicator {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 2px 7px;
  border-radius: 4px;
  background-color: var(--accent-cyan-dim);
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan-border);
}

.diagram-svg {
  width: 100%;
  height: auto;
  display: block;
}

.project-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--border-subtle);
}

.project-actions .btn {
  flex: 1;
}

/* ==========================================================================
   Engineering Approach ("How I Build")
   ========================================================================== */
.how-i-build-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.process-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 30px;
  position: relative;
  transition: all var(--transition-fast);
}

.process-card:hover {
  border-color: var(--accent-cyan-border);
  transform: translateY(-3px);
}

.process-step {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 16px;
}

.process-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.process-subtitle {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.process-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   Certifications & Education
   ========================================================================== */
.credentials-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.credential-column-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.certs-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.cert-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 22px;
  transition: border-color var(--transition-fast);
}

.cert-card:hover {
  border-color: var(--border-active);
}

.cert-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 8px;
}

.cert-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.cert-issuer {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
  background-color: var(--accent-cyan-dim);
  padding: 2px 8px;
  border-radius: 4px;
}

.cert-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.education-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 28px;
}

.edu-institution {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.edu-location {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-cyan);
  margin-bottom: 14px;
}

.edu-degree {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.edu-coursework-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.edu-course-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.course-item {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 8px 12px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 5px;
  color: var(--text-secondary);
}

/* ==========================================================================
   GitHub / Code Section ("Code, Not Just Screenshots.")
   ========================================================================== */
.code-section-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  overflow: hidden;
}

.terminal-header {
  background-color: #0b0e14;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.terminal-dots {
  display: flex;
  align-items: center;
  gap: 6px;
}

.t-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.t-dot.red { background-color: #ef4444; opacity: 0.8; }
.t-dot.yellow { background-color: #f59e0b; opacity: 0.8; }
.t-dot.green { background-color: #10b981; opacity: 0.8; }

.terminal-tab {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.terminal-body {
  padding: 36px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.code-pitch-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.code-pitch-text {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
}

.terminal-code-snippet {
  background-color: #06070a;
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.code-comment { color: var(--text-faint); }
.code-cmd { color: var(--accent-cyan); font-weight: 600; }
.code-val { color: #f8fafc; }

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info-panel {
  display: flex;
  flex-direction: column;
}

.contact-direct-cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 24px;
}

.direct-contact-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

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

.contact-item-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.contact-item-icon {
  width: 20px;
  height: 20px;
  fill: var(--accent-cyan);
}

.contact-item-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.contact-item-val {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.btn-copy-email {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 6px 12px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.btn-copy-email:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

/* Contact Form */
.contact-form-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 32px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-cyan);
}

.form-textarea {
  resize: vertical;
  min-height: 110px;
}

/* ==========================================================================
   Project Details Modal
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(4, 5, 8, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 24px;
}

.modal-overlay.is-active {
  display: flex;
}

.modal-container {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  position: relative;
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: 24px 30px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  background-color: var(--bg-surface);
  z-index: 10;
}

.modal-close-btn {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.modal-body {
  padding: 30px;
}

/* Toast notification */
.toast-notice {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: #0b101b;
  border: 1px solid var(--accent-cyan);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 12px 20px;
  border-radius: 6px;
  box-shadow: 0 8px 25px rgba(0, 229, 255, 0.2);
  z-index: 3000;
  display: none;
  align-items: center;
  gap: 10px;
}

.toast-notice.is-visible {
  display: flex;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  padding: 40px 0;
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-brand {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

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

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

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 1024px) {
  .fullstack-architecture-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .how-i-build-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .project-card {
    grid-template-columns: 1fr;
  }

  .project-card-visual {
    border-left: none;
    border-top: 1px solid var(--border-color);
  }

  .credentials-layout {
    grid-template-columns: 1fr;
  }

  .terminal-body {
    grid-template-columns: 1fr;
  }

  .contact-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .fullstack-architecture-grid {
    grid-template-columns: 1fr;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .how-i-build-grid {
    grid-template-columns: 1fr;
  }

  .edu-course-grid {
    grid-template-columns: 1fr;
  }

  .fullstack-statement-banner {
    flex-direction: column;
    align-items: flex-start;
  }

  .project-card-main {
    padding: 24px;
  }

  .project-card-visual {
    padding: 20px;
  }

  .footer-content {
    flex-direction: column;
    align-items: flex-start;
  }
}