/* IsaacPCodes Brand System CSS */

/* ===== CSS Variables ===== */
:root {
  --bg: #0B0F1A;
  --text: #E6E8EB;
  --accent: #5EEAD4;
  --text-muted: #9CA3AF;
  
  /* Spacing scale (8px base) */
  --space-xs: 0.5rem;    /* 8px */
  --space-sm: 1rem;      /* 16px */
  --space-md: 1.5rem;    /* 24px */
  --space-lg: 2rem;      /* 32px */
  --space-xl: 3rem;      /* 48px */
  --space-2xl: 4rem;     /* 64px */
  --space-3xl: 6rem;     /* 96px */
  
  /* Border radius */
  --radius-sm: 12px;
  --radius-md: 16px;
  
  /* Typography */
  --font-main: Inter, "Space Grotesk", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ===== Global Reset & Base ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  line-height: 1.3;
  margin-bottom: var(--space-md);
}

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

h2 {
  font-size: 2.25rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.75rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--space-sm);
  line-height: 1.7;
}

a {
  color: var(--text);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

a:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== Layout Containers ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-3xl) 0;
}

/* ===== Header & Navigation ===== */
header {
  background-color: var(--bg);
  border-bottom: 1px solid rgba(94, 234, 212, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(8px);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) 0;
  position: relative;
}

.logo {
  height: 40px;
  display: block;
}

.logo-link {
  z-index: 1001;
  position: relative;
}

/* Hide mobile menu toggle by default */
.menu-toggle {
  display: none;
}

.menu-icon {
  display: none;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
  align-items: center;
}

.nav-menu a {
  font-weight: 500;
  font-size: 0.95rem;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.nav-menu a:hover {
  background-color: rgba(94, 234, 212, 0.05);
}

/* ===== Hero Section ===== */
.hero {
  text-align: center;
  padding: var(--space-3xl) 0 var(--space-2xl);
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.hero-wordmark {
  max-width: 600px;
  width: 100%;
  margin-bottom: var(--space-lg);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
  line-height: 1.6;
}

.cta-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 1rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

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

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

.btn-secondary {
  background-color: transparent;
  color: var(--text);
  border-color: rgba(94, 234, 212, 0.3);
}

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

/* ===== Section Headers ===== */
.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

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

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent);
}

/* ===== About Section ===== */
.about-content {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.about-content p {
  margin-bottom: var(--space-md);
}

/* ===== Projects Section ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.project-card {
  background-color: rgba(94, 234, 212, 0.02);
  border: 1px solid rgba(94, 234, 212, 0.1);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: all 0.3s ease;
}

.project-card:hover {
  border-color: rgba(94, 234, 212, 0.3);
  transform: translateY(-4px);
}

.project-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  color: var(--text);
}

.project-description {
  color: var(--text-muted);
  margin-bottom: var(--space-md);
  line-height: 1.7;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.tag {
  font-size: 0.875rem;
  padding: 0.25rem 0.75rem;
  background-color: rgba(94, 234, 212, 0.1);
  color: var(--accent);
  border-radius: 6px;
  border: 1px solid rgba(94, 234, 212, 0.2);
}

.project-links {
  display: flex;
  gap: var(--space-md);
}

.project-links a {
  font-size: 0.95rem;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.project-links a:hover {
  border-bottom-color: var(--accent);
}

/* ===== Skills Section ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.skill-category {
  background-color: rgba(94, 234, 212, 0.02);
  border: 1px solid rgba(94, 234, 212, 0.1);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.skill-category h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
  color: var(--accent);
}

.skill-list {
  list-style: none;
}

.skill-list li {
  padding: var(--space-xs) 0;
  color: var(--text-muted);
  line-height: 1.6;
}

.skill-list li::before {
  content: '▹';
  color: var(--accent);
  margin-right: var(--space-xs);
  font-size: 1.2em;
}

/* ===== Contact Section ===== */
.contact-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-email {
  font-size: 1.5rem;
  color: var(--accent);
  margin: var(--space-lg) 0;
  display: inline-block;
}

.contact-links {
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
  margin-top: var(--space-xl);
}

.contact-links a {
  color: var(--text-muted);
  font-size: 1.1rem;
  transition: color 0.2s ease;
}

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

/* ===== Footer ===== */
footer {
  border-top: 1px solid rgba(94, 234, 212, 0.1);
  padding: var(--space-xl) 0;
  text-align: center;
}

.footer-content {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-md);
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
  /* Increase container padding on mobile */
  .container {
    padding: 0 var(--space-lg);
  }
  
  h1 {
    font-size: 2.25rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  /* Mobile Navigation - Hamburger Menu */
  .logo {
    height: 36px;
  }
  
  nav {
    padding: var(--space-md) 0;
  }
  
  /* Show hamburger icon */
  .menu-icon {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 28px;
    height: 24px;
    cursor: pointer;
    z-index: 1001;
    position: relative;
  }
  
  .menu-icon span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--accent);
    border-radius: 2px;
    transition: all 0.3s ease;
  }
  
  /* Hide menu by default on mobile */
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    max-width: 300px;
    height: 100vh;
    background-color: rgba(11, 15, 26, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-xl);
    transition: right 0.3s ease;
    border-left: 1px solid rgba(94, 234, 212, 0.2);
  }
  
  .nav-menu li {
    opacity: 0;
    transform: translateX(20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }
  
  .nav-menu a {
    font-size: 1.25rem;
    padding: var(--space-sm) var(--space-lg);
    display: block;
  }
  
  /* Show menu when checkbox is checked */
  .menu-toggle:checked ~ .nav-menu {
    right: 0;
  }
  
  .menu-toggle:checked ~ .nav-menu li {
    opacity: 1;
    transform: translateX(0);
  }
  
  .menu-toggle:checked ~ .nav-menu li:nth-child(1) {
    transition-delay: 0.1s;
  }
  
  .menu-toggle:checked ~ .nav-menu li:nth-child(2) {
    transition-delay: 0.15s;
  }
  
  .menu-toggle:checked ~ .nav-menu li:nth-child(3) {
    transition-delay: 0.2s;
  }
  
  .menu-toggle:checked ~ .nav-menu li:nth-child(4) {
    transition-delay: 0.25s;
  }
  
  .menu-toggle:checked ~ .nav-menu li:nth-child(5) {
    transition-delay: 0.3s;
  }
  
  /* Animate hamburger to X when open */
  .menu-toggle:checked ~ .menu-icon span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
  }
  
  .menu-toggle:checked ~ .menu-icon span:nth-child(2) {
    opacity: 0;
  }
  
  .menu-toggle:checked ~ .menu-icon span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
  }
  
  /* Hero adjustments for better mobile spacing */
  .hero {
    padding: var(--space-xl) 0 var(--space-2xl);
    min-height: auto;
  }
  
  .hero-wordmark {
    margin-bottom: var(--space-xl);
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
    margin-bottom: var(--space-xl);
  }
  
  /* Consistent section spacing */
  .section {
    padding: var(--space-xl) 0;
  }
  
  .section-header {
    margin-bottom: var(--space-xl);
  }
  
  /* CTA buttons with better spacing */
  .cta-buttons {
    flex-direction: column;
    width: 100%;
    gap: var(--space-md);
  }
  
  .btn {
    width: 100%;
  }
  
  /* Projects grid with proper spacing */
  .projects-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .project-card {
    padding: var(--space-md);
  }
  
  /* Skills grid with better spacing */
  .skills-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .skill-category {
    padding: var(--space-md);
  }
  
  /* Contact section spacing */
  .contact-links {
    margin-top: var(--space-lg);
    gap: var(--space-md);
  }
}

@media (max-width: 480px) {
  /* Even more padding on very small screens */
  .container {
    padding: 0 var(--space-md);
  }
  
  .logo {
    height: 32px;
  }
  
  nav {
    padding: var(--space-sm) 0;
  }
  
  .menu-icon {
    width: 26px;
    height: 22px;
  }
  
  .menu-icon span {
    height: 2.5px;
  }
  
  .nav-menu {
    width: 80%;
  }
  
  .nav-menu a {
    font-size: 1.1rem;
  }
  
  h1 {
    font-size: 1.75rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  /* Hero adjustments for tiny screens */
  .hero {
    padding: var(--space-lg) 0 var(--space-xl);
  }
  
  .hero-wordmark {
    margin-bottom: var(--space-lg);
  }
  
  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: var(--space-lg);
  }
  
  /* Tighter sections on small screens */
  .section {
    padding: var(--space-lg) 0;
  }
  
  .section-header {
    margin-bottom: var(--space-lg);
  }
  
  /* Project and skill cards */
  .projects-grid {
    gap: var(--space-lg);
  }
  
  .skills-grid {
    gap: var(--space-lg);
  }
  
  .contact-email {
    font-size: 1.1rem;
    word-break: break-all;
  }
  
  .contact-links {
    flex-direction: column;
    gap: var(--space-sm);
  }
}

/* ===== Utility Classes ===== */
.text-center {
  text-align: center;
}

.text-muted {
  color: var(--text-muted);
}

.mt-xl {
  margin-top: var(--space-xl);
}

.mb-xl {
  margin-bottom: var(--space-xl);
}