/* ============================================
   AI PRODUCT MANAGEMENT PORTFOLIO
   Design: Light, Warm, Minimalist
   ============================================ */

/* ============================================
   IMPORTS & RESETS
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ============================================
   COLOR PALETTE
   Warm Minimalist Theme
   ============================================ */
:root {
  /* Background Colors */
  --bg-primary: #FFFEF9;        /* Warm white */
  --bg-secondary: #F5F3EE;      /* Light beige */
  --bg-card: #FFFFFF;           /* Pure white for cards */

  /* Accent Colors */
  --accent-primary: #E07A5F;    /* Warm terracotta */
  --accent-secondary: #81B29A;  /* Sage green */
  --accent-hover: #D16B50;      /* Darker terracotta */

  /* Text Colors */
  --text-primary: #3D405B;      /* Dark blue-gray */
  --text-secondary: #6B6D76;    /* Medium gray */
  --text-light: #9B9DA9;        /* Light gray */

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Container */
  --container-max: 1200px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(61, 64, 91, 0.08);
  --shadow-md: 0 4px 16px rgba(61, 64, 91, 0.12);
  --shadow-hover: 0 8px 24px rgba(61, 64, 91, 0.16);

  /* Transitions */
  --transition: all 0.3s ease;
}

/* ============================================
   BASE STYLES
   ============================================ */
html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.5rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.75rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--accent-hover);
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

/* ============================================
   NAVIGATION
   ============================================ */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 254, 249, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: var(--spacing-sm) 0;
  box-shadow: var(--shadow-sm);
}

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

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
}

.nav-links a {
  color: var(--text-primary);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-links a:hover {
  background-color: var(--bg-secondary);
  color: var(--accent-primary);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-primary);
  cursor: pointer;
}

/* ============================================
   HERO SECTION
   ============================================ */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--spacing-lg);
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.hero-text h1 {
  margin-bottom: var(--spacing-xs);
}

.hero-title {
  font-size: 1.5rem;
  color: var(--accent-primary);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.hero-tagline {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.hero-proof {
  font-size: 1.05rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-sm);
  border-left: 3px solid var(--accent-secondary);
  line-height: 1.6;
  opacity: 0.9;
}

.cta-buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  text-align: center;
}

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

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

.btn-secondary:hover {
  background-color: var(--accent-primary);
  color: white;
}

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

.avatar {
  width: 300px;
  height: 300px;
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  object-fit: cover;
  border: 4px solid white;
}

/* ============================================
   SECTION HEADERS
   ============================================ */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-title {
  position: relative;
  display: inline-block;
  margin-bottom: var(--spacing-sm);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background-color: var(--accent-primary);
  border-radius: 2px;
}

.section-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
#about {
  background-color: white;
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
}

.about-text {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.value-props {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.value-prop {
  padding: var(--spacing-md);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  text-align: center;
}

.value-prop-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);

  /* SVG icon support */
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-sm);
}

.value-prop-icon svg {
  width: 100%;
  height: 100%;
  color: var(--accent-primary);
  stroke: var(--accent-primary);
  transition: var(--transition);
}

.value-prop:hover .value-prop-icon svg {
  transform: scale(1.1);
  color: var(--accent-hover);
  stroke: var(--accent-hover);
}

.value-prop h3 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.value-prop p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
#projects {
  background-color: var(--bg-secondary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-md);
}

.project-card {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}

.project-image {
  width: 100%;
  height: 220px;
  background: linear-gradient(135deg, var(--accent-secondary) 0%, var(--accent-primary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: white;
  position: relative;
  overflow: hidden;
}

/* Screenshot image styling */
.project-image img.project-screenshot {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.3s ease;
}

.project-card:hover .project-screenshot {
  transform: scale(1.05);
}

/* Icon styling (SVG or inline icons) */
.project-image svg.project-icon,
.project-image .icon-wrapper {
  width: 80px;
  height: 80px;
  color: white;
  flex-shrink: 0;
  z-index: 2;
}

/* Icon-only mode: gradient background with centered icon */
.project-image.icon-mode {
  background: linear-gradient(135deg, var(--accent-secondary) 0%, var(--accent-primary) 100%);
}

.project-image.icon-mode img.project-screenshot {
  display: none;
}

/* Screenshot-only mode: no gradient, just image */
.project-image.screenshot-mode {
  background: var(--bg-card);
}

.project-image.screenshot-mode svg.project-icon,
.project-image.screenshot-mode .icon-wrapper {
  display: none;
}

/* Hybrid mode: screenshot with subtle icon overlay in corner */
.project-image.hybrid-mode svg.project-icon {
  position: absolute;
  bottom: 12px;
  right: 12px;
  width: 40px;
  height: 40px;
  opacity: 0.9;
  background-color: rgba(61, 64, 91, 0.8);
  padding: 8px;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(4px);
}

/* Fallback: if screenshot fails to load in screenshot-mode, show icon */
.project-image.screenshot-mode img.project-screenshot[style*="display: none"] ~ svg.project-icon,
.project-image.screenshot-mode img.project-screenshot[style*="display: none"] ~ .icon-wrapper {
  display: block;
}

.project-content {
  padding: var(--spacing-md);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.project-title {
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.project-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  flex-grow: 1;
}

.project-role {
  background-color: var(--bg-secondary);
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
  border-left: 3px solid var(--accent-primary);
}

.project-role strong {
  color: var(--accent-primary);
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
}

.tech-tag {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  background-color: var(--accent-secondary);
  color: white;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
}

/* Project Links */
.project-links {
  display: flex;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
  flex-wrap: wrap;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background-color: var(--accent-primary);
  color: white;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
  text-decoration: none;
  border: none;
  cursor: pointer;
}

.project-link:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  color: white;
}

.project-link svg {
  flex-shrink: 0;
}

.project-link.case-study {
  background-color: var(--accent-secondary);
}

.project-link.case-study:hover {
  background-color: #6FA186;
}

/* ============================================
   SKILLS SECTION
   ============================================ */
#skills {
  background-color: white;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.skill-category {
  background-color: var(--bg-secondary);
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  text-align: center;
}

.skill-category h3 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
}

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  justify-content: center;
}

.skill-item {
  background-color: white;
  color: var(--text-primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.skill-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  background-color: var(--accent-primary);
  color: white;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
#contact {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  text-align: center;
}

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

.contact-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.contact-links {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--accent-primary);
  color: white;
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.contact-btn:hover {
  background-color: var(--accent-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  color: white;
}

.contact-btn.secondary {
  background-color: var(--accent-secondary);
}

.contact-btn.secondary:hover {
  background-color: #6FA186;
}

/* ============================================
   FOOTER
   ============================================ */
footer {
  background-color: var(--text-primary);
  color: white;
  text-align: center;
  padding: var(--spacing-md) 0;
}

footer p {
  color: rgba(255, 255, 255, 0.8);
  margin: 0;
}

/* ============================================
   ANIMATIONS
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
  /* Typography scaling */
  h1 {
    font-size: 2.25rem;
  }

  h2 {
    font-size: 1.875rem;
  }

  h3 {
    font-size: 1.5rem;
  }

  /* Navigation */
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    display: none;
  }

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

  .menu-toggle {
    display: block;
  }

  /* Hero section */
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-image {
    order: -1;
  }

  .avatar {
    width: 200px;
    height: 200px;
  }

  .cta-buttons {
    justify-content: center;
  }

  /* Projects grid */
  .projects-grid {
    grid-template-columns: 1fr;
  }

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

  /* Value props */
  .value-props {
    grid-template-columns: 1fr;
  }

  /* Spacing adjustments */
  section {
    padding: var(--spacing-lg) 0;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }

  /* Contact links */
  .contact-links {
    flex-direction: column;
  }

  .contact-btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.875rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .hero-tagline {
    font-size: 1.125rem;
  }

  .hero-proof {
    font-size: 0.95rem;
    padding-left: 0.75rem;
  }

  .btn {
    padding: 0.75rem 1.25rem;
    font-size: 0.95rem;
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  nav,
  .cta-buttons,
  #contact {
    display: none;
  }

  section {
    page-break-inside: avoid;
  }
}