/* ================================================================
   Portfolio Hub - Main Styles
   Color Scheme: Blue/Teal Palette
   ================================================================ */

/* ================================================================
   CSS Custom Properties (Variables)
   ================================================================ */

:root {
  /* Color Palette */
  --mint-green: #bee9e8ff;
  --moonstone: #62b6cbff;
  --indigo-dye: #1b4965ff;
  --columbia-blue: #cae9ffff;
  --picton-blue: #5fa8d3ff;
  --dark-slate: #2a5a7aff;                   /* New color: slightly lighter than indigo-dye */
  
  /* Semantic Color Usage - Dark Theme with Subtle Background Lightening */
  --color-primary: var(--mint-green);        /* Light teal for headers/text */
  --color-secondary: var(--columbia-blue);   /* Light blue for secondary text */
  --color-accent: var(--picton-blue);        /* Medium blue for highlights/buttons */
  --color-background: var(--indigo-dye);     /* Dark indigo for sections */
  --color-interactive: var(--moonstone);     /* Medium blue-green for links/hover */
  --color-text-light: #ffffff;               /* Pure white for high contrast text */
  --color-background-dark: var(--dark-slate); /* Slightly lighter dark background */
  
  /* Typography */
  --font-family-primary: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --font-family-display: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  
  /* Font Sizes */
  --font-size-xs: 0.75rem;     /* 12px */
  --font-size-sm: 0.875rem;    /* 14px */
  --font-size-base: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;    /* 18px */
  --font-size-xl: 1.25rem;     /* 20px */
  --font-size-2xl: 1.5rem;     /* 24px */
  --font-size-3xl: 1.875rem;   /* 30px */
  --font-size-4xl: 2.25rem;    /* 36px */
  --font-size-5xl: 3rem;       /* 48px */
  --font-size-6xl: 3.75rem;    /* 60px */
  
  /* Spacing */
  --spacing-xs: 0.25rem;   /* 4px */
  --spacing-sm: 0.5rem;    /* 8px */
  --spacing-md: 1rem;      /* 16px */
  --spacing-lg: 1.5rem;    /* 24px */
  --spacing-xl: 2rem;      /* 32px */
  --spacing-2xl: 3rem;     /* 48px */
  --spacing-3xl: 4rem;     /* 64px */
  --spacing-4xl: 6rem;     /* 96px */
  
  /* Layout */
  --max-width-content: 1200px;
  --max-width-text: 65ch;
  
  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-base: 0.3s ease-out;
  --transition-slow: 0.5s ease-out;
  
  /* Shadows - Dark Theme */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
}

/* ================================================================
   Reset & Base Styles
   ================================================================ */

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

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

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-primary);
  background-color: var(--color-background-dark);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ================================================================
   Typography
   ================================================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-display);
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
  margin-bottom: var(--spacing-md);
  max-width: var(--max-width-text);
}

a {
  color: var(--color-interactive);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* ================================================================
   Layout Utilities
   ================================================================ */

.container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-4xl) 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

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

/* ================================================================
   Header & Navigation
   ================================================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(13, 27, 42, 0);
  backdrop-filter: blur(0px);
  border-bottom: 1px solid rgba(190, 233, 232, 0);
  z-index: 1000;
  transition: all var(--transition-slow);
}

.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  max-width: var(--max-width-content);
  margin: 0 auto;
}

.header__logo {
  font-size: var(--font-size-2xl);
  font-weight: 700;
}

.header__logo a {
  color: var(--color-primary);
  text-decoration: none;
  text-shadow: 
    0 0 0 1px var(--columbia-blue),
    0 1px 2px rgba(27, 73, 101, 0.3);
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.header__logo-line1 {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.header__logo-line2 {
  font-size: var(--font-size-base);
  font-weight: 400;
  opacity: 0.9;
}

.header__nav ul {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
}

.header__nav a {
  font-size: var(--font-size-xl);
  font-weight: 500;
  color: var(--color-primary);
  transition: color var(--transition-fast);
  position: relative;
  padding: var(--spacing-sm) 0;
}

.header__nav a:hover,
.header__nav a.active {
  color: var(--color-interactive);
}

.header__nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-interactive);
  transition: width var(--transition-base);
}

.header__nav a:hover::after,
.header__nav a.active::after {
  width: 100%;
}

/* Mobile menu toggle (hidden by default) */
.header__menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.header__menu-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--color-primary);
  margin: 3px 0;
  transition: var(--transition-base);
}

/* Mobile menu animations */
.header__menu-toggle.active span:nth-child(1) {
  transform: rotate(-45deg) translate(-6px, 6px);
}

.header__menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.header__menu-toggle.active span:nth-child(3) {
  transform: rotate(45deg) translate(-6px, -6px);
}

/* Header scroll effect */
.header.scrolled {
  background-color: rgba(27, 73, 101, 0.95);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid rgba(190, 233, 232, 0.2);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* ================================================================
   Hero Section
   ================================================================ */

.hero {
  position: relative;
  height: 120vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: url('../images/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  background-attachment: scroll;
  overflow: visible;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, rgba(42, 90, 122, 0.1) 0%, rgba(42, 90, 122, 0.2) 40%, rgba(42, 90, 122, 0.4) 70%, rgba(42, 90, 122, 0.6) 90%, var(--color-background-dark) 100%);
  z-index: 1;
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 1200px;
  padding: var(--spacing-xl);
  animation: fadeInUp 1s ease-out;
  transition: all var(--transition-slow);
  transform: translateY(-15vh);
}

.hero__title {
  font-size: var(--font-size-6xl);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-light);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  white-space: nowrap;
  overflow: visible;
}

.hero__subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  margin-bottom: var(--spacing-2xl);
  opacity: 0.95;
  font-weight: 400;
}

/* ================================================================
   Hero Projects (Overlapping Cards)
   ================================================================ */

.hero__projects {
  position: absolute;
  bottom: -200px;
  left: 0;
  right: 0;
  z-index: 3;
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-2xl);
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.project-card {
  position: relative;
  background: var(--color-background-dark);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  transition: all var(--transition-slow);
  cursor: pointer;
  min-height: 350px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--color-accent);
  opacity: 0;
  transform: translateY(120px);
  visibility: hidden;
}

.project-card.animate-in {
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
}

.project-card:hover {
  transform: translateY(-10px) scale(1.08);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  border-color: var(--color-primary);
}

.project-card__placeholder {
  text-align: center;
  color: var(--color-primary);
  opacity: 0.8;
}

.project-card__placeholder h3 {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-sm);
}

/* Specific Project Card Backgrounds */
#portfolio-crafter-card {
  background-image: linear-gradient(
    rgba(27, 73, 101, 0.6), 
    rgba(27, 73, 101, 0.7)
  ), url('../images/projects/PortCrafter-BG.webp');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border: 2px solid var(--color-accent);
}

#portfolio-crafter-card .project-card__placeholder {
  background-color: rgba(27, 73, 101, 0.85);
  padding: var(--spacing-xl);
  border-radius: 12px;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(190, 233, 232, 0.3);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* ================================================================
   About & Resume Sections (Placeholders)
   ================================================================ */

.about {
  background-color: var(--color-background-dark);
  padding-top: calc(var(--spacing-4xl) + 275px);
}

.resume {
  background-color: var(--color-background-dark);
  padding-top: var(--spacing-lg);
}

.about:first-of-type {
  margin-top: 0;
}

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

.section__title {
  font-size: var(--font-size-4xl);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
}

.section__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  opacity: 0.9;
}

.section__content {
  max-width: var(--max-width-content);
  width: calc(100% + var(--spacing-xl));
  margin: 0 auto;
  text-align: left;
  padding: var(--spacing-2xl) var(--spacing-sm) var(--spacing-2xl) var(--spacing-2xl);
  background: rgba(98, 182, 203, 0.2);
  border-radius: 12px;
  border: 2px dashed var(--color-accent);
  color: var(--color-text-light);
  box-sizing: border-box;
}

.section__content h3 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.section__content p {
  color: var(--color-secondary);
  opacity: 0.9;
  font-size: var(--font-size-xl);
  line-height: 1.7;
}

/* ================================================================
   LinkedIn Footer Bar
   ================================================================ */

.linkedin-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40px;
  background-color: var(--indigo-dye);
  border-top: 2px solid var(--color-accent);
  z-index: 999;
  transform: translateY(100%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.linkedin-footer.visible {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.linkedin-footer__container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-lg);
}

.linkedin-footer__email {
  color: var(--color-accent);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.linkedin-footer__email:hover {
  color: var(--color-text-light);
  text-decoration: underline;
}

.linkedin-footer__link {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm);
  transition: transform var(--transition-fast);
  border-radius: 4px;
}

.linkedin-footer__link:hover {
  transform: scale(1.1);
}

.linkedin-footer__icon {
  width: 24px;
  height: 24px;
  display: block;
  transition: all var(--transition-fast);
  filter: brightness(0) invert(1); /* Make SVG white */
}

.linkedin-footer__link:hover .linkedin-footer__icon {
  transform: scale(1.05);
  filter: brightness(0) invert(1) drop-shadow(0 0 2px rgba(255, 255, 255, 0.3));
}

/* ================================================================
   Animations
   ================================================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(calc(-15vh + 50px));
  }
  to {
    opacity: 1;
    transform: translateY(-15vh);
  }
}

/* ================================================================
   Responsive Design
   ================================================================ */

@media (max-width: 768px) {
  :root {
    --font-size-6xl: 2.5rem;
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --spacing-4xl: 3rem;
  }
  
  .header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: rgba(27, 73, 101, 0.98);
    backdrop-filter: blur(15px);
    border-top: 1px solid rgba(190, 233, 232, 0.2);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }
  
  .header__nav.mobile-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .header__nav ul {
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
  }
  
  .header__nav a {
    padding: var(--spacing-md);
    display: block;
    text-align: center;
    border-bottom: 1px solid rgba(190, 233, 232, 0.1);
  }
  
  .header__menu-toggle {
    display: flex;
  }
  
  .hero__title {
    font-size: var(--font-size-5xl);
  }
  
  .hero__content {
    padding: var(--spacing-md);
    max-width: 95vw;
    transform: translateY(-12vh);
  }
  
  .hero__title {
    white-space: normal;
  }
  
  .hero {
    height: 120vh;
  }
  
  .hero__projects {
    bottom: -160px;
  }
  
  .projects__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .project-card {
    transform: translateY(100px);
    min-height: 280px;
    opacity: 0;
    visibility: hidden;
  }
  
  .project-card.animate-in {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .project-card:hover {
    transform: translateY(-8px) scale(1.05);
  }
  
  .about {
    padding-top: calc(var(--spacing-3xl) + 220px);
  }
  
  .resume {
    padding-top: var(--spacing-md);
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }
}

@media (max-width: 768px) {
  .hero__title {
    font-size: var(--font-size-4xl);
  }
  
  .hero__subtitle {
    font-size: var(--font-size-lg);
  }
  
  .hero__content {
    padding: var(--spacing-sm);
  }
  
  @keyframes fadeInUp {
    from {
      opacity: 0;
      transform: translateY(calc(-12vh + 40px));
    }
    to {
      opacity: 1;
      transform: translateY(-12vh);
    }
  }
}