/* ==========================================================================
   BELS-APP - Premium Glassmorphic Design System & Stylesheet
   Business Analyst Portfolio Showcase
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties / Color Palette (Dark Default + Light Theme)
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette - Dark Mode (Default) */
  --bg-main: #0b0f19;
  --bg-surface: rgba(18, 24, 38, 0.75);
  --bg-surface-hover: rgba(28, 36, 56, 0.85);
  --bg-card: rgba(22, 30, 46, 0.65);
  --bg-card-solid: #131b2e;
  --bg-glass-modal: rgba(11, 15, 25, 0.88);
  
  --border-color: rgba(255, 255, 255, 0.1);
  --border-highlight: rgba(16, 185, 129, 0.35);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-emerald: #10b981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.25);
  --accent-teal: #14b8a6;
  --accent-selfridges: #FFC600;
  --accent-indigo: #6366f1;
  --accent-indigo-glow: rgba(99, 102, 241, 0.25);
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;

  --gradient-primary: linear-gradient(135deg, #10b981 0%, #3b82f6 100%);
  --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
  --gradient-hero: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.18) 0%, rgba(16, 185, 129, 0.1) 45%, transparent 70%);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(16, 185, 129, 0.25);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --font-family: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-main: #f1f5f9;
  --bg-surface: rgba(255, 255, 255, 0.85);
  --bg-surface-hover: rgba(248, 250, 252, 0.95);
  --bg-card: rgba(255, 255, 255, 0.75);
  --bg-card-solid: #ffffff;
  --bg-glass-modal: rgba(255, 255, 255, 0.92);

  --border-color: rgba(0, 0, 0, 0.08);
  --border-highlight: rgba(16, 185, 129, 0.5);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 25px rgba(16, 185, 129, 0.15);

  --gradient-hero: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.08) 0%, rgba(16, 185, 129, 0.05) 45%, transparent 70%);
}

/* --------------------------------------------------------------------------
   2. Reset & Base Typography
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  background-image: var(--gradient-hero);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.25);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-emerald);
}

/* Container */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --------------------------------------------------------------------------
   3. Glassmorphic Navigation Bar
   -------------------------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-normal), border var(--transition-normal);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.5px;
}

.logo-badge {
  width: 38px;
  height: 38px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 800;
  box-shadow: 0 4px 14px var(--accent-emerald-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-selfridges);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  border-color: var(--accent-emerald);
  color: var(--accent-emerald);
  transform: rotate(15deg);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-emerald);
}

.status-pulse {
  width: 8px;
  height: 8px;
  background: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* --------------------------------------------------------------------------
   4. Hero & Executive Summary Section
   -------------------------------------------------------------------------- */
.hero-section {
  padding: 140px 0 70px 0;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.subtitle-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-indigo);
  width: fit-content;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-bio {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 26px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-normal);
}

.btn-primary {
  background: var(--accent-emerald);
  color: #0b0f19;
  box-shadow: 0 4px 20px var(--accent-emerald-glow);
}

.btn-primary:hover {
  background: var(--accent-teal);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-emerald-glow);
}

.btn-outline {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-outline:hover {
  border-color: var(--accent-emerald);
  background: var(--bg-surface-hover);
  transform: translateY(-2px);
}

/* Executive Card / Profile Widget */
.profile-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.2rem;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.profile-widget::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
}

.widget-header {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 1.8rem;
}

.avatar-container {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #1e293b, #0f172a);
  border: 2px solid var(--accent-emerald);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-emerald);
  box-shadow: var(--shadow-glow);
}

.widget-meta h3 {
  font-size: 1.35rem;
  font-weight: 700;
}

.widget-meta p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.widget-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.widget-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  font-size: 0.9rem;
}

.widget-item-label {
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.widget-item-val {
  font-weight: 700;
  color: var(--accent-emerald);
}

/* KPI Highlights Grid */
.kpi-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 4rem;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
  position: relative;
}

.kpi-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-md);
}

.kpi-value {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  line-height: 1.1;
  margin-bottom: 0.4rem;
}

.kpi-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.kpi-subtext {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   5. Section Header Component
   -------------------------------------------------------------------------- */
.section {
  padding: 90px 0;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3.5rem auto;
}

.section-tag {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent-emerald);
  margin-bottom: 0.6rem;
  display: block;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 0.8rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   6. Core Competencies & Skills Matrix Section
   -------------------------------------------------------------------------- */
.skills-tabs-container {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.skills-tab-btn {
  padding: 10px 22px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.skills-tab-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent-emerald);
}

.skills-tab-btn.active {
  background: var(--gradient-primary);
  color: #0b0f19;
  border-color: transparent;
  font-weight: 700;
  box-shadow: 0 4px 16px var(--accent-emerald-glow);
}

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

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  backdrop-filter: blur(12px);
}

.skill-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.skill-name {
  font-weight: 600;
  font-size: 1rem;
}

.skill-percent {
  font-weight: 700;
  color: var(--accent-emerald);
  font-size: 0.9rem;
}

.skill-bar-track {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  overflow: hidden;
}

.skill-bar-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 4px;
  transition: width 1s ease-out;
}

/* Tooling Stack Badges */
.tools-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 3rem;
}

.tool-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.tool-badge:hover {
  transform: translateY(-2px);
  border-color: var(--accent-indigo);
  box-shadow: 0 4px 16px var(--accent-indigo-glow);
}

.tool-badge i {
  color: var(--accent-teal);
  font-size: 1.1rem;
}

/* --------------------------------------------------------------------------
   7. Portfolio Projects Showcase Section
   -------------------------------------------------------------------------- */
.project-filters {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 10px 22px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  color: var(--text-primary);
  border-color: var(--accent-emerald);
  background: var(--bg-surface-hover);
}

.filter-btn.active {
  background: rgba(16, 185, 129, 0.15);
  border-color: var(--accent-emerald);
  color: var(--accent-emerald);
}

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

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  backdrop-filter: blur(14px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-lg);
}

.project-card-top {
  margin-bottom: 1.25rem;
}

.project-category-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-indigo);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 1rem;
}

.project-title {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.75rem;
  transition: color var(--transition-fast);
}

.project-card:hover .project-title {
  color: var(--accent-emerald);
}

.project-summary {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.25rem;
}

.project-kpi-badge {
  padding: 8px 14px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px dashed rgba(16, 185, 129, 0.4);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-emerald);
  margin-bottom: 1.25rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 1.5rem;
}

.tag-item {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}

.project-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.project-meta-info {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.view-details-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-emerald);
  transition: gap var(--transition-fast);
}

.view-details-btn:hover {
  gap: 10px;
}

/* --------------------------------------------------------------------------
   8. Deep Dive Modal System
   -------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  background: var(--bg-card-solid);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  max-width: 960px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  position: relative;
  transform: scale(0.95) translateY(20px);
  transition: transform var(--transition-bounce);
}

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

.modal-header {
  padding: 2rem 2.2rem 1.5rem 2.2rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  position: sticky;
  top: 0;
  background: var(--bg-card-solid);
  z-index: 10;
}

.modal-close-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  background: rgba(239, 68, 68, 0.2);
  color: #ef4444;
  border-color: #ef4444;
}

.modal-body {
  padding: 2.2rem;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* Modal Internal Layouts */
.modal-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.8rem;
}

.modal-section-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--accent-emerald);
}

.modal-card-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.4rem;
}

/* RACI Table */
.raci-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.raci-table th, .raci-table td {
  padding: 8px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.raci-table th {
  color: var(--text-muted);
  font-weight: 600;
}

.raci-status-pill {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-indigo);
}

/* Process Comparison Steps */
.process-flow-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.process-step-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.02);
  border-left: 3px solid var(--accent-emerald);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.9rem;
}

.step-number {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-emerald);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.75rem;
}

/* Code Snippet Box */
.code-container {
  position: relative;
  background: #090d16;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  font-family: 'Fira Code', 'Monaco', monospace;
  font-size: 0.82rem;
  color: #38bdf8;
  overflow-x: auto;
}

.code-copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 0.75rem;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
}

/* Chart Canvas Wrapper */
.chart-wrapper {
  position: relative;
  height: 280px;
  width: 100%;
  margin-top: 1rem;
}

/* --------------------------------------------------------------------------
   9. Interactive BA Impact / ROI Calculator Section
   -------------------------------------------------------------------------- */
.calculator-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
}

.calculator-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.slider-group {
  margin-bottom: 1.5rem;
}

.slider-label-row {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.slider-val-badge {
  color: var(--accent-emerald);
  font-weight: 700;
}

.custom-slider {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  -webkit-appearance: none;
}

.custom-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent-emerald);
  cursor: pointer;
  box-shadow: 0 0 10px var(--accent-emerald-glow);
  transition: transform var(--transition-fast);
}

.custom-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.calc-results-box {
  background: rgba(16, 185, 129, 0.05);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-md);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  text-align: center;
}

.res-item-big {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--accent-emerald);
  line-height: 1.1;
}

.res-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.res-secondary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1.25rem;
}

/* --------------------------------------------------------------------------
   10. Career Journey Timeline Component
   -------------------------------------------------------------------------- */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 28px;
  width: 4px;
  background: linear-gradient(180deg, var(--accent-emerald) 0%, var(--accent-indigo) 50%, rgba(255, 255, 255, 0.1) 100%);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
  padding-left: 70px;
}

.timeline-dot {
  position: absolute;
  left: 10px;
  top: 4px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-card-solid);
  border: 2px solid var(--accent-emerald);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-emerald);
  font-size: 1rem;
  box-shadow: 0 0 15px var(--accent-emerald-glow);
  z-index: 2;
  transition: all var(--transition-normal);
}

.timeline-item.current .timeline-dot {
  background: var(--accent-emerald);
  color: #0b0f19;
  border-color: #ffffff;
  box-shadow: 0 0 20px var(--accent-emerald);
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  backdrop-filter: blur(14px);
  transition: all var(--transition-normal);
}

.timeline-content:hover {
  transform: translateX(6px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-md);
}

.timeline-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.timeline-company {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.timeline-role {
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent-emerald);
}

.timeline-dates {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
}

.timeline-location {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

.timeline-summary {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.timeline-highlights {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.timeline-highlights li {
  font-size: 0.88rem;
  color: var(--text-primary);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.timeline-highlights li i {
  color: var(--accent-emerald);
  margin-top: 4px;
  font-size: 0.8rem;
}

/* --------------------------------------------------------------------------
   11. Contact & Footer Section
   -------------------------------------------------------------------------- */
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem;
  backdrop-filter: blur(16px);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--accent-emerald);
}

.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   11. Responsive Breakpoints
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-grid, .calculator-grid, .contact-grid {
    grid-template-columns: 1fr;
  }
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .kpi-bar {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none; /* Can be toggled via mobile menu if needed */
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .projects-grid {
    grid-template-columns: 1fr;
  }
  .skills-content-grid {
    grid-template-columns: 1fr;
  }
  .kpi-bar {
    grid-template-columns: 1fr;
  }
  .modal-grid-2 {
    grid-template-columns: 1fr;
  }
}