/* ==========================================================================
   Brand Design Tokens & Root Variables
   Brand Colors: #191970 (Navy), #fff (White), #639 (Purple), #232425 (Dark)
   ========================================================================== */
:root {
  --color-navy: #191970;
  --color-purple: #663399; /* #639 */
  --color-purple-light: rgba(102, 51, 153, 0.1);
  --color-dark: #232425;
  --color-dark-surface: #1a1b1c;
  --color-white: #ffffff;
  --color-light-bg: #f8f9fc;
  --color-gray-100: #f1f3f7;
  --color-gray-200: #e2e8f0;
  --color-text-muted: #64748b;
  --color-text-dark: #232425;

  --font-main:
    "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: "Space Grotesk", var(--font-main);

  --gradient-brand: linear-gradient(135deg, #191970 0%, #663399 100%);
  --gradient-dark: linear-gradient(135deg, #232425 0%, #191970 100%);
  --gradient-subtle: linear-gradient(
    135deg,
    rgba(25, 25, 112, 0.04) 0%,
    rgba(102, 51, 153, 0.04) 100%
  );

  --shadow-sm: 0 2px 8px rgba(35, 36, 37, 0.05);
  --shadow-md: 0 8px 24px rgba(25, 25, 112, 0.08);
  --shadow-lg: 0 16px 32px rgba(25, 25, 112, 0.12);

  --border-radius-sm: 8px;
  --border-radius-md: 14px;
  --border-radius-lg: 24px;
  --transition-fast: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Resets */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--color-light-bg);
  color: var(--color-text-dark);
  line-height: 1.6;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

/* Typography Helpers */
h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  color: var(--color-dark);
  line-height: 1.2;
}

.gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Section Shells */
.section {
  padding: 6rem 0;
}

.section-header {
  margin-bottom: 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-purple);
  margin-bottom: 0.5rem;
}

.section-tag.light {
  color: rgba(255, 255, 255, 0.8);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.8rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--border-radius-sm);
  transition: var(--transition-fast);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--gradient-brand);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(25, 25, 112, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 51, 153, 0.35);
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-navy);
  border: 1.5px solid var(--color-navy);
}

.btn-secondary:hover {
  background-color: var(--color-navy);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

/* Badge Pill */
.badge-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 1.1rem;
  background-color: var(--color-purple-light);
  color: var(--color-purple);
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: 50px;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(102, 51, 153, 0.2);
}

/* Header & Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-gray-200);
  transition: var(--transition-fast);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-navy);
}

.logo-dot {
  color: var(--color-purple);
}

.logo-image {
  height: 80px;
  width: auto;
  object-fit: contain;
}

.logo-content {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-dark);
  transition: var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-purple);
}

.btn-nav {
  padding: 0.5rem 1.2rem;
  background: var(--gradient-brand);
  color: var(--color-white) !important;
  border-radius: var(--border-radius-sm);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-dark);
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  padding: 10rem 0 6rem 0;
  background: var(--gradient-subtle);
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: 820px;
}

.hero-title {
  font-size: 3.8rem;
  font-weight: 800;
  letter-spacing: -1.5px;
  margin-bottom: 0.75rem;
}

.hero-subtitle {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: 1.5rem;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
  max-width: 740px;
}

.hero-cta-group {
  display: flex;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.hero-socials {
  display: flex;
  gap: 1.8rem;
  flex-wrap: wrap;
  align-items: center;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-dark);
  transition: var(--transition-fast);
}

.social-link:hover {
  color: var(--color-purple);
}

/* About / Summary Section */
.about-section {
  background-color: var(--color-white);
}

.about-card {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  padding: 2.5rem;
  background-color: var(--color-light-bg);
  border-radius: var(--border-radius-md);
  border-left: 5px solid var(--color-purple);
  box-shadow: var(--shadow-sm);
  margin-bottom: 3rem;
}

.about-icon {
  font-size: 2.5rem;
  color: var(--color-navy);
  flex-shrink: 0;
}

.about-text p {
  font-size: 1.2rem;
  color: var(--color-text-dark);
  line-height: 1.8;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.stat-card {
  padding: 1.8rem;
  background-color: var(--color-light-bg);
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--color-gray-200);
  text-align: center;
  transition: var(--transition-fast);
}

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

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--color-navy);
  margin-bottom: 0.3rem;
}

.stat-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

/* Pillars Section */
.pillars-section {
  background-color: var(--color-light-bg);
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.8rem;
}

.pillar-card {
  background-color: var(--color-white);
  padding: 2.2rem;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: var(--transition-fast);
}

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

.pillar-num {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  color: rgba(25, 25, 112, 0.1);
}

.pillar-header {
  margin-bottom: 1.5rem;
}

.pillar-header i {
  font-size: 2rem;
  color: var(--color-purple);
  margin-bottom: 1rem;
  display: block;
}

.pillar-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-navy);
}

.pillar-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.95rem;
  color: var(--color-text-dark);
  margin-bottom: 0.8rem;
}

.pillar-list i {
  color: var(--color-purple);
  margin-top: 0.2rem;
  font-size: 0.85rem;
}

/* Technology Portfolio Section */
.portfolio-section {
  background-color: var(--color-white);
}

.portfolio-filter-bar {
  display: flex;
  gap: 0.8rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.6rem 1.4rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 50px;
  background-color: var(--color-light-bg);
  border: 1px solid var(--color-gray-200);
  color: var(--color-dark);
  cursor: pointer;
  transition: var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--gradient-brand);
  color: var(--color-white);
  border-color: transparent;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

.portfolio-card {
  background-color: var(--color-light-bg);
  padding: 2rem;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--color-gray-200);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-fast);
}

.portfolio-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-purple);
}

.card-badge {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-navy);
  background-color: rgba(25, 25, 112, 0.08);
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
  margin-bottom: 1.2rem;
}

.card-title {
  font-size: 1.3rem;
  margin-bottom: 0.8rem;
  color: var(--color-dark);
}

.card-desc {
  font-size: 0.98rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
}

.card-tags span {
  font-size: 0.8rem;
  font-weight: 600;
  background-color: var(--color-white);
  color: var(--color-purple);
  padding: 0.25rem 0.7rem;
  border-radius: 4px;
  border: 1px solid var(--color-gray-200);
}

/* Skills Section */
.skills-section {
  background-color: var(--color-light-bg);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.8rem;
}

.skill-card {
  background-color: var(--color-white);
  padding: 2rem;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
}

.skill-category-header {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--color-gray-100);
}

.skill-category-header i {
  font-size: 1.4rem;
  color: var(--color-purple);
}

.skill-category-header h3 {
  font-size: 1.15rem;
  color: var(--color-navy);
}

.skill-list li {
  font-size: 0.95rem;
  color: var(--color-text-dark);
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--color-gray-200);
}

.skill-list li:last-child {
  border-bottom: none;
}

/* Contact Section */
.contact-section {
  background: var(--color-dark);
  color: var(--color-white);
}

.contact-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.contact-title {
  color: var(--color-white);
  font-size: 2.4rem;
  margin-bottom: 1.2rem;
}

.contact-text {
  color: rgba(255, 255, 255, 0.75);
  font-size: 1.05rem;
  margin-bottom: 2.5rem;
}

.contact-direct {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  padding: 1rem;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition-fast);
}

.contact-item:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--color-purple);
}

.contact-item i {
  font-size: 1.5rem;
  color: var(--color-purple);
}

.item-label {
  display: block;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
  text-transform: uppercase;
}

.item-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-white);
}

/* Form Styles */
.contact-form-wrapper {
  background-color: var(--color-white);
  padding: 2.5rem;
  border-radius: var(--border-radius-md);
  color: var(--color-dark);
}

.contact-form h3 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--color-navy);
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: var(--color-dark);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  font-family: var(--font-main);
  font-size: 0.95rem;
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--border-radius-sm);
  outline: none;
  transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-purple);
  box-shadow: 0 0 0 3px rgba(102, 51, 153, 0.15);
}

.form-feedback {
  margin-top: 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
}

.form-feedback.success {
  color: #10b981;
}

.form-feedback.error {
  color: #ef4444;
}

/* Footer */
.site-footer {
  background-color: #1a1b1c;
  color: rgba(255, 255, 255, 0.6);
  padding: 2rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.9rem;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-white);
  font-weight: 600;
  transition: var(--transition-fast);
}

.back-to-top:hover {
  color: var(--color-purple);
}

/* Media Queries */
@media (max-width: 992px) {
  .hero-title {
    font-size: 3rem;
  }

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

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background-color: var(--color-white);
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-lg);
  }

  .nav-menu.open {
    left: 0;
  }

  .nav-toggle {
    display: block;
  }

  .hero-title {
    font-size: 2.4rem;
  }

  .about-card {
    flex-direction: column;
    gap: 1rem;
  }

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

  .footer-container {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}