/**
 * J. SADEG - Graphic Design Portfolio
 * Homepage Layout Styles
 */

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

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family-base);
  font-weight: var(--font-weight-regular);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: var(--line-height-normal);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */

.page-wrapper {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--content-padding-x);
  padding-right: var(--content-padding-x);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

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

.site-header {
  width: 100%;
  padding-top: clamp(1rem, 2vw, 1.75rem);
  padding-bottom: clamp(1rem, 2vw, 1.75rem);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

.brand-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  transition: opacity var(--transition-base);
}

.brand-link:hover {
  opacity: 0.85;
}

.brand-link:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
  border-radius: var(--radius-tag);
}

.brand-logo {
  height: clamp(42px, 4vw, 56px);
  width: auto;
}

/* Burger button: hidden on desktop */
.burger-btn {
  display: none;
}

.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 3.5vw, 3.5rem);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-family: var(--font-family-base);
  font-size: var(--font-size-nav);
  color: var(--color-dark);
  text-decoration: none;
  position: relative;
  padding: 6px 2px;
  transition: color var(--transition-base);
  white-space: nowrap;
}

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

/* Active navigation state: using pink secondary color (#C859B0) */
.nav-link.active,
.nav-link[aria-current="page"] {
  color: var(--color-active);
  font-weight: 500;
}

.nav-link.active::after,
.nav-link[aria-current="page"]::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-active);
  border-radius: 2px;
}

.nav-link:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
  border-radius: var(--radius-tag);
}

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

.hero-section {
  padding-top: clamp(2rem, 4vw, 3.5rem);
  padding-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.hero-content {
  max-width: 820px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: clamp(1.5rem, 2.8vw, 2.375rem); /* ~38px gap in Figma */
}

.hero-title {
  margin: 0;
  font-family: var(--font-family-base);
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-tight);
  color: var(--color-dark);
  letter-spacing: -0.02em;
}

.hero-subtitle {
  margin: 0;
  font-family: var(--font-family-base);
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-regular);
  line-height: 1.35;
  color: var(--color-dark);
}

.hero-cta {
  margin-top: clamp(0.5rem, 1vw, 1rem);
}

/* ==========================================================================
   Transition Band & Capabilities (Options B & C)
   ========================================================================== */

.transition-band {
  padding-top: clamp(1.5rem, 3vw, 2.75rem);
  padding-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.capabilities-strip {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: clamp(1.25rem, 2vw, 2rem);
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
}

.section-title {
  margin: 0;
  font-family: var(--font-family-base);
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-regular);
  color: var(--color-dark);
  letter-spacing: -0.01em;
}

/* ==========================================================================
   Projects Section
   ========================================================================== */

.projects-section {
  padding-bottom: clamp(3rem, 6vw, 6rem);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1rem, 2vw, 1.75rem);
}

.projects-grid .project-card {
  width: 100%;
}

/* ==========================================================================
   Site Footer
   ========================================================================== */

.site-footer {
  margin-top: auto;
  padding-top: clamp(2rem, 3vw, 3rem);
  padding-bottom: clamp(1.5rem, 2vw, 2.5rem);
  border-top: 1px solid var(--color-dark);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--color-dark);
  opacity: 0.85;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-link {
  text-decoration: none;
  transition: color var(--transition-base);
}

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

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

/* Tablet (landscape & small desktop) */
@media (max-width: 1024px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .projects-grid .project-card:last-child {
    grid-column: span 2;
  }
}

/* Mobile & Small Tablet */
@media (max-width: 768px) {
  .nav-container {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    position: relative;
    width: 100%;
    gap: var(--spacing-md);
  }

  /* Progressive enhancement: burger button active when JS is ready */
  .site-header.js-nav-ready .burger-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    padding: 0;
    margin: 0;
    background-color: var(--color-bg);
    color: var(--color-dark);
    border: 1px solid var(--color-dark);
    border-radius: var(--radius-btn);
    cursor: pointer;
    transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
  }

  .site-header.js-nav-ready .burger-btn:hover {
    background-color: var(--color-dark);
    color: var(--color-bg);
  }

  .site-header.js-nav-ready .burger-btn:focus-visible {
    outline: var(--focus-ring);
    outline-offset: var(--focus-offset);
  }

  .burger-icon {
    display: block;
  }

  .burger-icon-close {
    display: none;
  }

  .burger-btn[aria-expanded="true"] .burger-icon-open {
    display: none;
  }

  .burger-btn[aria-expanded="true"] .burger-icon-close {
    display: block;
  }

  /* Full-width panel directly under the header with rounded corners and shadow */
  .site-header.js-nav-ready .site-nav {
    display: none;
    position: absolute;
    top: calc(100% + var(--spacing-sm));
    left: 0;
    width: 100%;
    height: auto;
    background-color: var(--color-bg);
    border: 1px solid var(--color-dark);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    z-index: 100;
    overflow: hidden;
  }

  .site-header.js-nav-ready .site-nav.is-open {
    display: block;
  }

  /* Fallback without JavaScript: nav stays visible as a normal stacked list */
  .site-header:not(.js-nav-ready) .burger-btn {
    display: none;
  }

  .site-header:not(.js-nav-ready) .nav-container {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-header:not(.js-nav-ready) .site-nav {
    display: block;
    width: 100%;
    height: auto;
    margin-top: var(--spacing-md);
  }

  /* Stacked nav items */
  .nav-list {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 0;
    margin: 0;
    padding: 0;
    list-style: none;
    background-color: var(--color-bg);
  }

  .nav-list li {
    width: 100%;
    display: flex;
    border-bottom: 1px solid rgba(57, 18, 36, 0.12);
  }

  .nav-list li:last-child {
    border-bottom: none;
  }

  .nav-link {
    display: flex;
    align-items: center;
    width: 100%;
    min-height: 48px;
    padding: 14px 20px;
    font-size: var(--font-size-nav);
    color: var(--color-dark);
    text-decoration: none;
    background-color: var(--color-bg);
    border-radius: 0;
    transition: color var(--transition-base), background-color var(--transition-base);
  }

  .nav-link:hover {
    color: var(--color-hover);
    background-color: rgba(62, 98, 190, 0.06);
  }

  .nav-link.active,
  .nav-link[aria-current="page"] {
    color: var(--color-active);
    font-weight: 500;
  }

  .nav-link.active::after,
  .nav-link[aria-current="page"]::after {
    display: none;
  }

  .nav-link:focus-visible {
    outline: var(--focus-ring);
    outline-offset: -2px;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .projects-grid .project-card:last-child {
    grid-column: auto;
  }

  .btn {
    width: 100%;
    max-width: 320px;
  }

  .footer-content {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  .hero-content {
    gap: 1.25rem;
  }

  .tag-list {
    gap: 8px;
  }

  .tag-item {
    font-size: 0.85rem;
    padding: 6px 12px;
  }
}