/* Willem Grasso Portfolio - Premium Apple-Inspired Design */
/* Ultra-minimal, clean, professional black/white aesthetic */

/* ===== CSS VARIABLES ===== */
:root {
  --color-black: #000;
  --color-dark: #111;
  --color-gray-900: #1a1a1a;
  --color-gray-800: #2a2a2a;
  --color-gray-700: #3a3a3a;
  --color-gray-600: #555;
  --color-gray-500: #888;
  --color-gray-400: #aaa;
  --color-gray-300: #ccc;
  --color-gray-200: #e5e5e5;
  --color-gray-100: #f5f5f5;
  --color-white: #fff;
  
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', sans-serif;
  
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 5rem;
  --spacing-3xl: 8rem;
}

/* ===== RESET & BASE ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 17.6px;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-white);
  color: var(--color-black);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.text-hero {
  font-size: clamp(3rem, 15vw, 14rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 0.9;
}

.text-display {
  font-size: clamp(2.5rem, 8vw, 6rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.text-title {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 500;
  letter-spacing: -0.02em;
}

.text-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--color-gray-600);
}

.text-body {
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.7;
}

.text-small {
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.text-micro {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ===== NAVIGATION ===== */
.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-lg) var(--spacing-xl);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  background: transparent;
  transition: var(--transition-smooth);
}

.nav-header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.nav-brand {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-brand-text {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-black);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.nav-brand-text:hover {
  opacity: 0.6;
}

.nav-links {
  display: flex;
  gap: 3rem;
}

.nav-link {
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--color-black);
  text-decoration: none;
  transition: opacity 0.2s ease;
  opacity: 0.6;
}

.nav-link:hover {
  opacity: 1;
}

.nav-link.active {
  opacity: 1;
}

/* Mobile Navigation */
.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-mobile-toggle span {
  display: block;
  width: 18px;
  height: 1px;
  background: var(--color-black);
  margin: 4px 0;
  transition: var(--transition-fast);
}

.nav-mobile {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-white);
  z-index: 999;
  padding: var(--spacing-3xl) var(--spacing-xl);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-mobile.active {
  display: flex;
}

.nav-mobile .nav-link {
  font-size: 1.5rem;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .nav-mobile-toggle {
    display: block;
  }
  
  .nav-header {
    padding: var(--spacing-md) var(--spacing-lg);
    align-items: center;
  }
}

/* ===== HERO SECTION ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3xl) var(--spacing-xl);
  position: relative;
}

.hero-content {
  text-align: center;
  transform: translateY(-5%);
}

.hero-content-split {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 1200px;
  text-align: center;
  gap: var(--spacing-xl);
}

.hero-left {
  width: 100%;
}

.hero-title-small {
  font-size: clamp(3rem, 10vw, 8rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 0.95;
  opacity: 0;
  transform: translateY(40px);
  animation: fadeUp 1.2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  animation-delay: 0.3s;
}

.hero-right {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-nav {
  display: flex;
  flex-direction: row;
  gap: var(--spacing-xl);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 1s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  animation-delay: 0.6s;
}

.hero-nav-link {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-gray-500);
  text-decoration: none;
  transition: color 0.2s ease;
  padding: 0.25rem 0;
}

.hero-nav-link:hover {
  color: var(--color-black);
}

@media (max-width: 768px) {
  .hero-content-split {
    gap: var(--spacing-lg);
  }
  
  .hero-nav {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .hero-title-small {
    font-size: clamp(2.5rem, 12vw, 5rem);
  }
}

.hero-title {
  opacity: 0;
  transform: translateY(40px);
  animation: fadeUp 1.2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  animation-delay: 0.3s;
}

.hero-subtitle {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 1s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  animation-delay: 0.8s;
  margin-top: var(--spacing-lg);
  color: var(--color-gray-500);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  animation: fadeUp 1s ease forwards;
  animation-delay: 1.5s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.scroll-indicator span {
  color: var(--color-gray-400);
}

.scroll-indicator svg {
  animation: bounce 2s ease infinite;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(6px); }
  60% { transform: translateY(3px); }
}

/* ===== SECTIONS ===== */
.section {
  padding: var(--spacing-3xl) 0;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

/* ===== PILLARS SECTION ===== */
.pillars-section {
  background: var(--color-gray-100);
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-3xl);
}

.pillar {
  opacity: 1;
}

.pillar-number {
  display: block;
  margin-bottom: 1rem;
  color: var(--color-gray-500);
}

.pillar h3 {
  margin-bottom: 1rem;
}

.pillar p {
  color: var(--color-gray-600);
}

@media (max-width: 1024px) {
  .pillars-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

/* ===== STATEMENT SECTION ===== */
.statement-section {
  padding: var(--spacing-3xl) 0;
}

.statement-section .container {
  max-width: 1000px;
}

.statement {
  text-align: center;
  opacity: 0;
  transform: translateY(30px);
}

.statement.visible {
  animation: fadeUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.statement .accent {
  color: var(--color-gray-400);
}

/* ===== PROJECTS SECTION ===== */
.projects-section {
  background: var(--color-white);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
  margin-bottom: var(--spacing-sm);
}

.section-header p {
  color: var(--color-gray-500);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.project-card {
  background: var(--color-gray-100);
  border: 1px solid var(--color-gray-200);
  padding: var(--spacing-xl);
  transition: var(--transition-smooth);
  text-decoration: none;
  color: inherit;
  display: block;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.project-card:hover {
  border-color: var(--color-gray-400);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.project-preview {
  width: 100%;
  height: 200px;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-preview-placeholder {
  color: var(--color-gray-400);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.project-type {
  display: inline-block;
  margin-bottom: var(--spacing-xs);
  color: var(--color-gray-500);
  padding: 0.25rem 0.5rem;
  background: var(--color-gray-100);
}

.project-type-humanitarian {
  background: var(--color-gray-200);
  color: var(--color-gray-700);
}

.project-type-app {
  background: var(--color-black);
  color: var(--color-white);
}

.project-card h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 1.25rem;
}

.project-card p {
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-lg);
  font-size: 0.9rem;
  line-height: 1.6;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-black);
  transition: var(--transition-fast);
}

.project-link:hover {
  gap: 0.75rem;
}

.project-link svg {
  transition: var(--transition-fast);
}

@media (max-width: 768px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== VOLUNTEERING SECTION ===== */
.volunteering-section {
  background: var(--color-gray-100);
}

.volunteering-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

@media (max-width: 768px) {
  .volunteering-grid {
    grid-template-columns: 1fr;
  }
}

.volunteering-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  padding: var(--spacing-xl);
  transition: var(--transition-smooth);
}

.volunteering-card:hover {
  border-color: var(--color-gray-400);
}

.volunteering-location {
  display: inline-block;
  margin-bottom: var(--spacing-sm);
  color: var(--color-gray-500);
  padding: 0.25rem 0.5rem;
  background: var(--color-gray-100);
}

.volunteering-card h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 1.25rem;
}

.volunteering-card p {
  color: var(--color-gray-600);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ===== CONTACT CTA SECTION ===== */
.contact-section {
  background: var(--color-black);
  color: var(--color-white);
}

.contact-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-content h2 {
  margin-bottom: var(--spacing-lg);
  opacity: 0;
  transform: translateY(30px);
}

.contact-content h2.visible {
  animation: fadeUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.contact-content p {
  color: var(--color-gray-400);
  margin-bottom: var(--spacing-xl);
  opacity: 0;
  transform: translateY(30px);
}

.contact-content p.visible {
  animation: fadeUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  animation-delay: 0.1s;
}

.contact-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
  opacity: 0;
  transform: translateY(30px);
}

.contact-buttons.visible {
  animation: fadeUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  animation-delay: 0.2s;
}

.social-links {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  opacity: 0;
  transform: translateY(30px);
}

.social-links.visible {
  animation: fadeUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  animation-delay: 0.3s;
}

.social-link {
  color: var(--color-gray-400);
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: var(--transition-fast);
}

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

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.btn-primary {
  background: var(--color-white);
  color: var(--color-black);
}

.btn-primary:hover {
  background: var(--color-gray-200);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-white);
  border: 1px solid var(--color-gray-600);
}

.btn-secondary:hover {
  border-color: var(--color-white);
}

/* ===== FOOTER ===== */
.footer {
  padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-lg);
  border-top: 1px solid var(--color-gray-200);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-link {
  font-size: 0.6875rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--color-gray-500);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: var(--color-black);
}

.footer-copyright {
  font-size: 0.6875rem;
  color: var(--color-gray-400);
}

@media (max-width: 640px) {
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gray-300);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-400);
}

/* ===== SELECTION ===== */
::selection {
  background: var(--color-black);
  color: var(--color-white);
}

/* ===== PROJECT DETAIL PAGES ===== */
.project-hero {
  padding: calc(var(--spacing-3xl) + 80px) 0 var(--spacing-2xl);
  border-bottom: 1px solid var(--color-gray-200);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-gray-500);
  text-decoration: none;
  margin-bottom: var(--spacing-lg);
  transition: var(--transition-fast);
}

.back-link:hover {
  color: var(--color-black);
}

.project-title {
  margin-bottom: var(--spacing-sm);
}

.project-location {
  color: var(--color-gray-500);
}

.project-hero-image {
  padding: var(--spacing-xl) 0;
  background: var(--color-gray-100);
}

.project-image-placeholder {
  width: 100%;
  height: 400px;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-400);
}

.project-overview {
  padding: var(--spacing-2xl) 0;
}

.project-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--spacing-xl);
}

@media (max-width: 768px) {
  .project-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
}

.project-sidebar {
  position: relative;
}

.project-content {
  max-width: 700px;
}

.project-intro {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--color-gray-700);
}

.project-details-section {
  background: var(--color-gray-100);
}

.project-gallery-section {
  padding: var(--spacing-2xl) 0;
}

.project-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

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

.gallery-item .project-image-placeholder {
  height: 250px;
}

.project-impact-section {
  background: var(--color-gray-100);
}

.impact-stats {
  display: flex;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
}

.impact-stat {
  flex: 1;
  min-width: 150px;
}

.impact-number {
  display: block;
  font-size: 3rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.impact-label {
  font-size: 0.875rem;
  color: var(--color-gray-600);
}

.project-tech-section {
  background: var(--color-gray-100);
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.tech-tag {
  background: var(--color-white);
  border: 1px solid var(--color-gray-300);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  color: var(--color-gray-700);
}

.project-cta-section {
  background: var(--color-black);
  color: var(--color-white);
}

.project-cta {
  text-align: center;
  padding: var(--spacing-xl) 0;
}

.project-cta p {
  color: var(--color-gray-400);
  margin-top: var(--spacing-sm);
}

.next-project-section {
  border-top: 1px solid var(--color-gray-200);
  padding: var(--spacing-2xl) 0;
}

.next-project-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-decoration: none;
  color: inherit;
  padding: var(--spacing-lg);
  background: var(--color-gray-100);
  transition: var(--transition-smooth);
}

.next-project-link:hover {
  background: var(--color-gray-200);
}

.next-project-link .text-micro {
  color: var(--color-gray-500);
  display: block;
  margin-bottom: var(--spacing-xs);
}

.next-project-link svg {
  color: var(--color-gray-400);
  transition: var(--transition-fast);
}

.next-project-link:hover svg {
  color: var(--color-black);
  transform: translateX(4px);
}

/* ===== ABOUT PAGE ===== */
.about-hero {
  padding: calc(var(--spacing-3xl) + 80px) 0 var(--spacing-2xl);
  border-bottom: 1px solid var(--color-gray-200);
}

.about-hero-content {
  max-width: 800px;
}

.about-label {
  display: block;
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-md);
}

.about-title {
  margin-bottom: 0;
}

.about-section {
  padding: var(--spacing-2xl) 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--spacing-3xl);
}

@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
}

.about-photo-placeholder {
  width: 100%;
  aspect-ratio: 1;
  background: var(--color-gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-400);
}

.about-intro {
  font-size: 1.25rem;
  line-height: 1.7;
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-xl);
}

.about-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.about-detail-item {
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-gray-200);
}

.about-detail-label {
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-xs);
}

.about-story-section {
  background: var(--color-gray-100);
}

.about-story-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--spacing-xl);
}

@media (max-width: 768px) {
  .about-story-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
}

.about-story-sidebar {
  position: relative;
}

.about-story-content {
  max-width: 700px;
}

.about-story-content p {
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
}

.about-story-content p:last-child {
  margin-bottom: 0;
}

/* ===== RESUME PAGE ===== */
.resume-hero {
  padding: calc(var(--spacing-3xl) + 80px) 0 var(--spacing-3xl);
  border-bottom: 1px solid var(--color-gray-200);
}

.resume-hero-content {
  max-width: 800px;
}

.resume-label {
  display: block;
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-md);
}

.resume-title {
  margin-bottom: var(--spacing-sm);
}

.resume-tagline {
  color: var(--color-black);
  margin-bottom: var(--spacing-xs);
}

.resume-target {
  color: var(--color-gray-500);
}

.resume-section {
  padding: var(--spacing-2xl) 0;
}

.resume-section-alt {
  background: var(--color-gray-100);
}

.resume-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--spacing-xl);
}

@media (max-width: 768px) {
  .resume-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
}

.resume-sidebar {
  position: relative;
}

.section-label {
  color: var(--color-gray-500);
  position: sticky;
  top: 100px;
}

.resume-content {
  max-width: 700px;
}

.profile-text {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--color-gray-700);
}

.resume-item {
  margin-bottom: var(--spacing-xl);
}

.resume-item:last-child {
  margin-bottom: 0;
}

.resume-item-title {
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
}

.resume-item-org {
  font-size: 0.9rem;
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-sm);
}

.resume-item-desc {
  color: var(--color-gray-600);
  line-height: 1.7;
}

/* Coursework */
.resume-coursework {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-gray-300);
}

.coursework-label {
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-md);
}

.coursework-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.coursework-list li {
  background: var(--color-white);
  border: 1px solid var(--color-gray-300);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  color: var(--color-gray-700);
}

/* Skills Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

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

.skill-category {
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-gray-200);
}

.skill-category-title {
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-xs);
}

.skill-category p {
  color: var(--color-gray-700);
  font-size: 0.95rem;
}

/* Experience List */
.experience-list {
  list-style: none;
  margin-top: var(--spacing-sm);
}

.experience-list li {
  position: relative;
  padding-left: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  color: var(--color-gray-600);
  line-height: 1.7;
}

.experience-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 4px;
  height: 4px;
  background: var(--color-gray-400);
  border-radius: 50%;
}

/* Project Items */
.project-item {
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-gray-200);
}

.project-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

/* Interests Tags */
.interests-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.interest-tag {
  background: var(--color-white);
  border: 1px solid var(--color-gray-300);
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  color: var(--color-gray-700);
  transition: var(--transition-fast);
}

.interest-tag:hover {
  border-color: var(--color-black);
  color: var(--color-black);
}

/* ===== LOGIN OVERLAY ===== */
.login-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-white);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.login-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.login-container {
  text-align: center;
  padding: var(--spacing-xl);
  max-width: 400px;
  width: 100%;
}

.login-title {
  margin-bottom: var(--spacing-sm);
}

.login-subtitle {
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-xl);
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.login-input {
  width: 100%;
  padding: 1rem 1.25rem;
  border: 1px solid var(--color-gray-300);
  font-family: var(--font-primary);
  font-size: 1rem;
  text-align: center;
  transition: border-color 0.2s ease;
  background: var(--color-white);
}

.login-input:focus {
  outline: none;
  border-color: var(--color-black);
}

.login-input::placeholder {
  color: var(--color-gray-400);
}

.btn-login {
  background: var(--color-black);
  color: var(--color-white);
  width: 100%;
  padding: 1rem;
  font-family: var(--font-primary);
}

.btn-login:hover {
  background: var(--color-gray-800);
}

.login-error {
  color: #dc2626;
  font-size: 0.875rem;
  margin-top: var(--spacing-sm);
  min-height: 1.5rem;
}

/* ===== MOBILE RESPONSIVE ENHANCEMENTS ===== */
@media (max-width: 768px) {
  /* Base adjustments */
  html {
    font-size: 16px;
  }
  
  /* Reduce section padding on mobile */
  .section {
    padding: var(--spacing-2xl) 0;
  }
  
  .container {
    padding: 0 var(--spacing-lg);
  }
  
  /* Hero adjustments */
  .hero {
    min-height: 100vh;
    min-height: 100dvh; /* Dynamic viewport height for mobile browsers */
    padding: var(--spacing-2xl) var(--spacing-lg);
  }
  
  .hero-content-split {
    gap: var(--spacing-lg);
  }
  
  .hero-nav {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
  }
  
  .hero-nav-link {
    font-size: 0.9rem;
    padding: 0.5rem;
  }
  
  /* Scroll indicator - smaller on mobile */
  .scroll-indicator {
    bottom: 2rem;
  }
  
  /* Section headers */
  .section-header {
    margin-bottom: var(--spacing-xl);
  }
  
  /* Pillars */
  .pillars-grid {
    gap: var(--spacing-xl);
  }
  
  .pillar h3 {
    font-size: 1.25rem;
  }
  
  /* Project cards */
  .project-card {
    padding: var(--spacing-lg);
  }
  
  .project-preview {
    height: 160px;
    margin-bottom: var(--spacing-md);
  }
  
  .project-card h3 {
    font-size: 1.1rem;
  }
  
  .project-card p {
    font-size: 0.85rem;
    margin-bottom: var(--spacing-md);
  }
  
  /* Volunteering cards */
  .volunteering-card {
    padding: var(--spacing-lg);
  }
  
  .volunteering-card h3 {
    font-size: 1.1rem;
  }
  
  .volunteering-card p {
    font-size: 0.85rem;
  }
  
  /* Footer */
  .footer {
    padding: var(--spacing-lg);
  }
  
  .footer-links {
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
  }
  
  /* Login overlay */
  .login-container {
    padding: var(--spacing-lg);
  }
  
  .login-title {
    font-size: 1.5rem;
  }
  
  .login-input {
    padding: 0.875rem 1rem;
    font-size: 16px; /* Prevents zoom on iOS */
  }
  
  .btn-login {
    padding: 0.875rem;
  }
  
  /* Project detail pages */
  .project-hero {
    padding: calc(var(--spacing-2xl) + 60px) 0 var(--spacing-xl);
  }
  
  .project-image-placeholder {
    height: 250px;
  }
  
  .gallery-item .project-image-placeholder {
    height: 180px;
  }
  
  .impact-number {
    font-size: 2.5rem;
  }
  
  .impact-stats {
    gap: var(--spacing-lg);
  }
  
  /* Resume page */
  .resume-hero {
    padding: calc(var(--spacing-2xl) + 60px) 0 var(--spacing-xl);
  }
  
  .profile-text {
    font-size: 1rem;
  }
  
  .resume-item-title {
    font-size: 1.1rem;
  }
  
  .coursework-list li {
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
  }
  
  /* About page */
  .about-hero {
    padding: calc(var(--spacing-2xl) + 60px) 0 var(--spacing-xl);
  }
  
  .about-intro {
    font-size: 1.1rem;
  }
  
  .about-photo-placeholder {
    max-width: 250px;
    margin: 0 auto;
  }
}

/* Extra small devices */
@media (max-width: 400px) {
  html {
    font-size: 15px;
  }
  
  .hero-title-small {
    font-size: clamp(2rem, 14vw, 4rem);
  }
  
  .hero-nav {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .project-card,
  .volunteering-card {
    padding: var(--spacing-md);
  }
  
  .footer-links {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
}

/* Ensure touch targets are large enough */
@media (hover: none) and (pointer: coarse) {
  .nav-link,
  .hero-nav-link,
  .footer-link,
  .project-link,
  .back-link {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
  
  .nav-mobile .nav-link {
    min-height: 48px;
  }
  
  /* Disable hover effects on touch */
  .project-card:hover {
    transform: none;
  }
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}