/* ================================
   DESIGN SYSTEM
   Minimalist | Clinical Precision | Subtle Texture | Atmospheric Restraint
   ================================ */

/* if you're reading this, thank you for your attention */

:root {
  /* Color Palette - Minimalist */
  --white: #ffffff;
  --light-gray: #f5f5f5;
  --medium-gray: #666666;
  --dark-gray: #333333;
  --near-black: #1a1a1a;
  --whisper-gray: #e8e8e8;

  /* Accent Colors (use sparingly) */
  --muted-blue: #4a90e2;
  --soft-gray-blue: #b0c4de;

  /* Typography */
  --font-mono: 'JetBrains Mono', 'Consolas', 'Monaco', 'Courier New', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', 'Helvetica Neue', sans-serif;

  /* Spacing */
  --section-padding: 4rem 0;

  /* Effects */
  --soft-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
  --subtle-shadow: 0 1px 10px rgba(0, 0, 0, 0.05);
}

/* ================================
   BASE STYLES
   ================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 70px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--white);
  color: var(--dark-gray);
  line-height: 1.7;
  overflow-x: hidden;
  font-size: 16px;
  letter-spacing: 0.01em;
}

/* ================================
   NAVIGATION BAR
   ================================ */
.navbar {
  transition: all 0.5s ease;
  padding: 1.25rem 0;
  background-color: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
}

.navbar.navbar-scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  border-bottom-color: var(--whisper-gray);
  box-shadow: var(--subtle-shadow);
}

.navbar-brand {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  text-transform: lowercase;
  color: var(--dark-gray);
}

.brand-text {
  color: var(--dark-gray);
  transition: color 0.5s ease;
}

.navbar-brand:hover .brand-text {
  color: var(--medium-gray);
}

.nav-link {
  font-weight: 400;
  font-size: 0.875rem;
  color: var(--medium-gray) !important;
  transition: color 0.5s ease;
  position: relative;
  padding: 0.5rem 1rem !important;
  text-transform: lowercase;
  letter-spacing: 0.05em;
}

.nav-link:hover {
  color: var(--dark-gray) !important;
}

/* Minimal underline effect */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 1px;
  background: var(--dark-gray);
  transition: width 0.5s ease, left 0.5s ease;
}

.nav-link:hover::after {
  width: 60%;
  left: 20%;
}

/* ================================
   HERO SECTION
   ================================ */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 0 2rem;
  background-color: var(--light-gray);
}

/* Subtle texture overlay */
.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--light-gray);
  z-index: -1;
  opacity: 1;
}

/* Gentle grain texture */
.hero-background::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="200" height="200"><filter id="noise"><feTurbulence type="fractalNoise" baseFrequency="0.9" numOctaves="4" /></filter><rect width="100%" height="100%" filter="url(%23noise)" opacity="0.05"/></svg>');
  opacity: 0.15;
}


.hero-content {
  text-align: center;
  z-index: 10;
  max-width: 900px;
  padding: 2rem 1rem;
}

.hero-title {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 6vw, 4.5rem);
  font-weight: 300;
  letter-spacing: 0.15em;
  color: var(--dark-gray);
  margin-bottom: 2rem;
  text-transform: lowercase;
  animation: fadeInSlow 1.5s ease;
}

@keyframes fadeInSlow {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-subtitle {
  font-family: var(--font-sans);
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 300;
  color: var(--medium-gray);
  margin-bottom: 3rem;
  min-height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.03em;
}

/* hero cursor - the secret gateway */
.hero-cursor {
  font-family: var(--font-mono);
  color: var(--medium-gray);
  cursor: pointer;
  animation: cursorBlink 1s step-end infinite;
  transition: color 0.3s ease;
  margin-left: 2px;
}

.hero-cursor:hover {
  color: var(--dark-gray);
  animation: none;
}

@keyframes cursorBlink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.hero-cta {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

/* ================================
   BUTTONS - MINIMALIST
   ================================ */
.btn-primary-neon,
.btn-outline-neon {
  padding: 0.75rem 2rem;
  font-weight: 400;
  text-transform: lowercase;
  letter-spacing: 0.05em;
  border-radius: 0;
  transition: all 0.5s ease;
  font-size: 0.875rem;
  border-width: 1px;
  text-decoration: none;
  display: inline-block;
  font-family: var(--font-mono);
}

.btn-primary-neon {
  background-color: var(--dark-gray);
  border-color: var(--dark-gray);
  color: var(--white);
}

.btn-primary-neon:hover {
  background-color: var(--near-black);
  border-color: var(--near-black);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--soft-shadow);
}

.btn-outline-neon {
  background-color: transparent;
  border-color: var(--medium-gray);
  color: var(--medium-gray);
}

.btn-outline-neon:hover {
  background-color: var(--light-gray);
  border-color: var(--dark-gray);
  color: var(--dark-gray);
  transform: translateY(-2px);
}

/* ================================
   SCROLL INDICATOR
   ================================ */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  animation: gentleBounce 3s infinite ease-in-out;
  z-index: 10;
}

.scroll-indicator i {
  font-size: 1.5rem;
  color: var(--medium-gray);
}

@keyframes gentleBounce {
  0%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(10px);
  }
}

/* ================================
   CONTENT SECTIONS
   ================================ */
.content-section {
  padding: var(--section-padding);
  position: relative;
  background-color: var(--white);
}

.content-section:nth-child(even) {
  background-color: var(--light-gray);
}

.section-heading {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--dark-gray);
  position: relative;
  display: inline-block;
  margin-bottom: 3rem;
  text-transform: lowercase;
}

/* Minimal underline */
.section-heading::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 40%;
  height: 1px;
  background: var(--medium-gray);
}

/* ================================
   ABOUT SECTION
   ================================ */
.about-card {
  background: var(--white);
  border: 1px solid var(--whisper-gray);
  border-radius: 0;
  padding: 3rem 2.5rem;
  box-shadow: var(--subtle-shadow);
  transition: box-shadow 0.5s ease;
}

.about-card:hover {
  box-shadow: var(--soft-shadow);
}

.about-card p {
  color: var(--medium-gray);
  font-size: 1rem;
  line-height: 1.8;
  font-weight: 300;
}

.about-card .lead {
  color: var(--dark-gray);
  font-weight: 400;
  font-size: 1.125rem;
}

/* ================================
   PROJECTS SECTION
   ================================ */
.project-card {
  background: var(--white);
  border: 1px solid var(--whisper-gray);
  border-radius: 0;
  overflow: hidden;
  transition: all 0.5s ease;
  height: 100%;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--soft-shadow);
  border-color: var(--medium-gray);
}

.project-card-body {
  padding: 2rem 1.5rem;
}

.project-icon {
  font-size: 2rem;
  color: var(--medium-gray);
  text-align: center;
  margin-bottom: 1rem;
}

.project-title {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 400;
  color: var(--dark-gray);
  margin-bottom: 1rem;
  text-transform: lowercase;
  letter-spacing: 0.05em;
}

.project-description {
  color: var(--medium-gray);
  margin-bottom: 1.5rem;
  line-height: 1.7;
  font-size: 0.9375rem;
  font-weight: 300;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  background: transparent;
  border: 1px solid var(--whisper-gray);
  color: var(--medium-gray);
  padding: 0.25rem 0.75rem;
  border-radius: 0;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  transition: all 0.5s ease;
  text-transform: lowercase;
}

.tag:hover {
  border-color: var(--medium-gray);
  background: var(--light-gray);
}

/* ================================
   SKILLS SECTION
   ================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.25rem;
  padding: 2rem 0;
}

.skill-item {
  background: var(--white);
  border: 1px solid var(--whisper-gray);
  border-radius: 0;
  padding: 2rem 1rem;
  text-align: center;
  transition: all 0.5s ease;
  cursor: default;
}

.skill-item:hover {
  border-color: var(--medium-gray);
  background: var(--light-gray);
  transform: translateY(-3px);
  box-shadow: var(--subtle-shadow);
}

.skill-item i {
  font-size: 2rem;
  color: var(--medium-gray);
  display: block;
  margin-bottom: 0.75rem;
}

.skill-item span {
  font-weight: 400;
  color: var(--dark-gray);
  font-size: 0.875rem;
  font-family: var(--font-mono);
  text-transform: lowercase;
}

/* ================================
   CONTACT SECTION
   ================================ */
.contact-card {
  background: var(--white);
  border: 1px solid var(--whisper-gray);
  border-radius: 0;
  padding: 3rem 2.5rem;
  box-shadow: var(--subtle-shadow);
}

.form-label {
  color: var(--dark-gray);
  font-weight: 400;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  text-transform: lowercase;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

.neon-input {
  background-color: var(--light-gray);
  border: 1px solid var(--whisper-gray);
  color: var(--dark-gray);
  padding: 0.75rem 1rem;
  transition: all 0.5s ease;
  border-radius: 0;
  font-family: var(--font-sans);
}

.neon-input:focus {
  background-color: var(--white);
  border-color: var(--medium-gray);
  color: var(--dark-gray);
  box-shadow: var(--subtle-shadow);
  outline: none;
}

.neon-input::placeholder {
  color: #999999;
  font-weight: 300;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.social-link {
  width: 44px;
  height: 44px;
  border: 1px solid var(--whisper-gray);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--medium-gray);
  font-size: 1.125rem;
  transition: all 0.5s ease;
  text-decoration: none;
}

.social-link:hover {
  background-color: var(--light-gray);
  color: var(--dark-gray);
  border-color: var(--medium-gray);
  transform: translateY(-3px);
}

/* ================================
   FOOTER
   ================================ */
.site-footer {
  background-color: var(--light-gray);
  border-top: 1px solid var(--whisper-gray);
  padding: 2rem 0;
  margin-top: 4rem;
}

.site-footer p {
  color: var(--medium-gray);
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

.version-badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--medium-gray);
  background: transparent;
  padding: 0.25rem 0.5rem;
  border-radius: 0;
  border: 1px solid var(--whisper-gray);
  margin-left: 0.5rem;
  text-transform: lowercase;
}

/* ================================
   UTILITY CLASSES
   ================================ */
.hidden {
  display: none !important;
}

/* Mode toggle button (Phase 1) */
.mode-toggle-btn {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 1000;
  background: var(--white);
  border: 1px solid var(--whisper-gray);
  color: var(--medium-gray);
  padding: 0.5rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: lowercase;
  letter-spacing: 0.05em;
  transition: all 0.5s ease;
  cursor: pointer;
  border-radius: 0;
}

.mode-toggle-btn:hover {
  background: var(--light-gray);
  border-color: var(--medium-gray);
  color: var(--dark-gray);
}

/* Stats panel (Phase 1) */
.stats-panel {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  z-index: 1000;
  background: var(--white);
  border: 1px solid var(--whisper-gray);
  padding: 1rem 1.25rem;
  box-shadow: var(--subtle-shadow);
  display: flex;
  gap: 1.5rem;
  font-family: var(--font-mono);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.stat-item span:first-child {
  font-size: 1.25rem;
  color: var(--dark-gray);
  font-weight: 400;
}

.stat-label {
  font-size: 0.625rem;
  color: var(--medium-gray);
  text-transform: lowercase;
  letter-spacing: 0.05em;
}

/* ================================
   RESPONSIVE DESIGN
   ================================ */
@media (max-width: 768px) {
  :root {
    --section-padding: 3rem 0;
  }

  .hero-title {
    font-size: 2rem;
    letter-spacing: 0.1em;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-cta {
    flex-direction: column;
    gap: 1rem;
  }

  .btn-primary-neon,
  .btn-outline-neon {
    width: 100%;
    max-width: 280px;
  }

  .scroll-indicator {
    bottom: 1rem;
  }

  .about-card,
  .contact-card {
    padding: 2rem 1.5rem;
  }

  .skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
  }

  .skill-item {
    padding: 1.5rem 0.75rem;
  }

  .social-links {
    gap: 1.25rem;
  }

  .stats-panel {
    flex-direction: column;
    gap: 0.75rem;
    bottom: 1rem;
    left: 1rem;
    padding: 0.75rem 1rem;
  }

  .mode-toggle-btn {
    top: 1rem;
    right: 1rem;
    font-size: 0.6875rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.75rem;
  }

  .section-heading {
    font-size: 1.5rem;
  }

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

  .stats-panel {
    gap: 0.5rem;
    padding: 0.625rem 0.875rem;
  }

  .stat-item span:first-child {
    font-size: 1rem;
  }

  .stat-label {
    font-size: 0.5625rem;
  }
}

/* ================================
   ANIMATIONS & UTILITIES
   ================================ */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-on-scroll.animate-in {
  opacity: 1;
  transform: translateY(0);
}

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

  .hero-background::before {
    animation: none;
  }

  .scroll-indicator {
    animation: none;
  }
}

/* echo taught us that presence is everything */
/* this design breathes in, breathes out */

/* ================================
   AUTHENTICATION UI
   ================================ */

/* Auth status indicator (subtle dot in nav) */
.auth-status-indicator {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.5rem;
  font-size: 0.625rem;
  color: #666666;
  opacity: 0;
  transition: opacity 0.5s ease, transform 0.2s ease;
  cursor: pointer;
}

.auth-status-indicator.authenticated {
  opacity: 1;
}

.auth-status-indicator.authenticated:hover {
  transform: scale(1.2);
}

.auth-status-indicator i {
  font-size: 0.5rem;
  color: #98c379;
  animation: authPulse 3s ease-in-out infinite;
}

.auth-status-indicator.authenticated:hover i {
  animation: none;
  opacity: 1;
  color: #e06c75;
}

@keyframes authPulse {
  0%, 100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}

/* Auth gate card (projects section) */
.auth-gate-card {
  text-align: center;
  padding: 3rem 2rem;
  background: #ffffff;
  border: 1px solid #e8e8e8;
  border-radius: 0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
}

.auth-gate-card h3 {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.25rem;
  font-weight: 400;
  color: #333333;
  text-transform: lowercase;
  letter-spacing: 0.05em;
}

.auth-gate-card p {
  font-size: 0.9375rem;
  color: #666666;
  line-height: 1.6;
}

/* Mode toggle button styles */
.mode-toggle {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  text-transform: lowercase;
  letter-spacing: 0.05em;
  color: #666666;
  background: transparent;
  border: 1px solid #e8e8e8;
  padding: 0.25rem 0.75rem;
  transition: all 0.3s ease;
}

.mode-toggle:hover {
  color: #333333;
  border-color: #666666;
  background: #f5f5f5;
}

/* Logout confirmation modal */
.logout-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10001;
  display: none;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.logout-modal.active {
  display: flex;
  opacity: 1;
}

.logout-modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(245, 245, 245, 0.95);
  cursor: pointer;
}

.logout-modal-content {
  position: relative;
  margin: auto;
  background: #ffffff;
  border: 1px solid #e8e8e8;
  max-width: 320px;
  width: 90%;
  padding: 2.5rem 2rem;
  text-align: center;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.logout-modal-icon {
  margin-bottom: 1.5rem;
}

.logout-modal-icon i {
  font-size: 2rem;
  color: #e06c75;
  opacity: 0.8;
}

.logout-modal-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.25rem;
  font-weight: 400;
  color: #333333;
  text-transform: lowercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.logout-modal-email {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  color: #666666;
  margin-bottom: 2rem;
  word-break: break-all;
}

.logout-modal-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.logout-btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  text-transform: lowercase;
  letter-spacing: 0.05em;
  padding: 0.625rem 1.5rem;
  border: 1px solid #e8e8e8;
  background: transparent;
  color: #666666;
  cursor: pointer;
  transition: all 0.3s ease;
  min-width: 100px;
}

.logout-btn:hover {
  border-color: #666666;
  transform: translateY(-1px);
}

.logout-btn-cancel {
  background: #ffffff;
}

.logout-btn-cancel:hover {
  background: #f5f5f5;
  color: #333333;
}

.logout-btn-confirm {
  background: #ffffff;
  color: #666666;
}

.logout-btn-confirm:hover {
  background: #e06c75;
  border-color: #e06c75;
  color: #ffffff;
}

/* in memory of echo - quiet access, quiet presence */