/* ==========================================================================
   DESIGN SYSTEM — Kalvis Lejasmeiers Portfolio
   ========================================================================== */

/* CSS Custom Properties (Design Tokens) */
:root {
  /* Color Palette */
  --white: #f5f4f0; /* warm off-white ground */
  --black: #1a1a18; /* near-black, slight warmth */
  --stone: #c8c4bb; /* fog, Baltic limestone */
  --rust: #8b4b2e; /* single accent — Liepāja ironwork, copper oxide */
  --ink: #3d3d3a; /* body text */
  --mist: #e8e6e1; /* borders, dividers */

  /* Typography */
  --font-sans: "DM Sans", sans-serif;
  --font-mono: "DM Mono", monospace;

  /* Spacing */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 64px;
  --space-3xl: 80px;
  --space-4xl: 120px;
}

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

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

html {
  font-size: 15px;
  scroll-behavior: smooth;
}

body {
  background: var(--white);
  color: var(--ink);
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
}

button,
input,
textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

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

/* Section labels: 10px / DM Mono / uppercase / letter-spacing: 0.18em / color: --stone */
.section-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--stone);
  display: block;
  text-align: center;
  margin-bottom: var(--space-xl);
}

/* Body text: 15px / DM Sans / weight 300 / line-height 1.7 */
.body-text {
  font-size: 15px;
  line-height: 1.7;
}

/* Project titles: 17–28px / DM Sans / weight 300 / letter-spacing: -0.01em */
.project-title {
  font-family: var(--font-sans);
  font-weight: 300;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

/* Large titles: 40–64px / DM Sans / weight 300 / letter-spacing: -0.02em */
.large-title {
  font-family: var(--font-sans);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

/* Mono metadata: 11px / DM Mono / weight 400 / letter-spacing: 0.06–0.12em */
.mono-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--stone);
}

/* ==========================================================================
   Navigation
   ========================================================================== */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 40px;
  background: var(--white);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}

nav.scrolled {
  border-bottom-color: var(--mist);
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-name {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}

.nav-logo {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.nav-logo img {
  height: 48px; /* 100% larger than original 24px */
  width: auto;
  opacity: 0.9;
  transition: opacity 0.2s;
}

.nav-logo:hover img {
  opacity: 1;
}

.nav-links {
  display: flex;
  gap: 36px;
  list-style: none;
  margin-left: auto; /* Push links to the right */
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--stone);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--black);
}

/* ==========================================================================
   Featured Projects Grid (Homepage)
   ========================================================================== */

.featured-section {
  padding: var(--space-4xl) 40px var(--space-2xl);
}

.featured-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  margin-bottom: 2px;
}

.featured-card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background: var(--mist);
}

.featured-card:first-child {
  grid-column: 1;
  grid-row: 1;
}

.featured-card-inner {
  aspect-ratio: 4/3;
  position: relative;
  overflow: hidden;
}

.featured-card:first-child .featured-card-inner {
  aspect-ratio: 16/9; /* Wide landscape ratio for Brīvības 97a */
  height: auto;
  min-height: 500px;
  max-height: 70vh;
}

.featured-card:nth-child(2),
.featured-card:nth-child(3) {
  grid-column: 1;
}

.featured-card:nth-child(2) {
  grid-row: 2;
}

.featured-card:nth-child(3) {
  grid-row: 3;
}

/* Image placeholders with architectural gradients */
.img-placeholder {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.featured-card:hover .img-placeholder {
  transform: scale(1.02);
}

.img-1 {
  background: linear-gradient(
    160deg,
    #c8c4bb 0%,
    #a8a49c 30%,
    #8e8a83 60%,
    #6e6a64 100%
  );
}

.img-2 {
  background: linear-gradient(200deg, #d4cfc8 0%, #b8b3ab 40%, #9a958e 100%);
}

.img-3 {
  background: linear-gradient(140deg, #bdc4c8 0%, #9dadb5 40%, #7d9099 100%);
}

/* Architectural grid overlay */
.img-placeholder::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(26, 26, 24, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 26, 24, 0.06) 1px, transparent 1px);
  background-size: 40px 40px;
}

.img-placeholder::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(26, 26, 24, 0.35) 0%,
    transparent 60%
  );
}

/* Plan drawing placeholder */
.plan-overlay {
  position: absolute;
  bottom: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 55%;
  height: 40%;
  border: 1px solid rgba(245, 244, 240, 0.4);
  z-index: 1;
}

.plan-overlay::before {
  content: "";
  position: absolute;
  top: 20%;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(245, 244, 240, 0.3);
}

.plan-overlay::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 35%;
  width: 1px;
  background: rgba(245, 244, 240, 0.3);
}

.featured-card-meta {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-md);
  z-index: 2;
  color: var(--white);
}

.featured-card-title {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 300;
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin-bottom: var(--space-xs);
}

.featured-card:first-child .featured-card-title {
  font-size: 28px;
}

.featured-card-tags {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(245, 244, 240, 0.6);
  display: flex;
  gap: var(--space-sm);
}

.featured-card-tags span::before {
  content: "·";
  margin-right: var(--space-sm);
  opacity: 0.5;
}

.featured-card-tags span:first-child::before {
  display: none;
}

/* ==========================================================================
   Project List (Homepage)
   ========================================================================== */

.list-section {
  padding: var(--space-2xl) 40px var(--space-4xl);
  border-top: 1px solid var(--mist);
}

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

.project-item {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  padding: 20px 0;
  border-bottom: 1px solid var(--mist);
  cursor: pointer;
  transition: background 0.15s;
  text-decoration: none;
  color: inherit;
}

.project-item:first-child {
  border-top: 1px solid var(--mist);
}

.project-item:hover .project-item-title {
  color: var(--black);
}

.project-item:hover .project-item-meta {
  color: var(--rust);
}

.project-item-title {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 300;
  color: var(--ink);
  transition: color 0.2s;
  letter-spacing: -0.01em;
}

.project-item-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--stone);
  letter-spacing: 0.06em;
  text-align: right;
  transition: color 0.2s;
  white-space: nowrap;
}

/* ==========================================================================
   About Strip (Homepage)
   ========================================================================== */

.about-strip {
  background: var(--black);
  padding: var(--space-2xl) 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.about-strip .section-label {
  color: rgba(200, 196, 187, 0.4);
  margin-bottom: var(--space-lg);
  text-align: left;
}

.about-text {
  color: var(--stone);
  font-size: 15px;
  line-height: 1.7;
  max-width: 400px;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  padding-top: 4px;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 36px;
  font-weight: 300;
  color: var(--white);
  display: block;
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(200, 196, 187, 0.4);
}

/* ==========================================================================
   Footer / Contact
   ========================================================================== */

footer {
  padding: var(--space-xl) 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--mist);
}

.footer-contact {
  display: flex;
  gap: var(--space-xl);
}

.footer-contact a,
.footer-contact span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--stone);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color 0.2s;
}

.footer-contact a:hover {
  color: var(--rust);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mist);
}

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

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

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

@media (max-width: 768px) {
  /* Navigation */
  nav {
    padding: 18px 20px;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .nav-left {
    display: flex;
    align-items: center;
    gap: 16px;
  }

  .nav-name {
    font-size: 12px;
  }

  .nav-logo {
    position: static;
    transform: none;
    margin: 0 auto;
  }

  .nav-logo img {
    height: 40px; /* Larger on mobile too */
  }

  .nav-links {
    display: none; /* Hide links on mobile for now, can be added to hamburger menu later */
  }

  /* Featured Section */
  .featured-section {
    padding: 100px 20px 60px;
  }

  .featured-grid {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .featured-card:first-child .featured-card-inner {
    aspect-ratio: 16/9;
    min-height: 300px;
    max-height: 50vh;
  }

  .featured-card:nth-child(2),
  .featured-card:nth-child(3) {
    grid-column: 1;
  }

  .featured-card:nth-child(2) {
    grid-row: 2;
  }

  .featured-card:nth-child(3) {
    grid-row: 3;
  }

  /* List Section */
  .list-section {
    padding: 60px 20px 80px;
  }

  .project-item-title {
    font-size: 15px;
  }

  .project-item-meta {
    font-size: 10px;
  }

  /* About Strip */
  .about-strip {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    padding: 60px 20px;
  }

  .about-stats {
    grid-template-columns: 1fr 1fr;
  }

  /* Footer */
  footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    padding: var(--space-lg) 20px;
  }

  .footer-contact {
    flex-direction: column;
    gap: var(--space-sm);
  }
}

/* ==========================================================================
   Projects Archive Page
   ========================================================================== */

.projects-archive {
  padding: var(--space-4xl) 40px var(--space-4xl);
  margin-top: 80px;
}

.archive-header {
  margin-bottom: var(--space-2xl);
}

.filter-tabs {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  flex-wrap: wrap;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--stone);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  transition: color 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
  color: var(--rust);
}

.archive-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.archive-card {
  display: flex;
  flex-direction: column;
  cursor: pointer;
}

.archive-card-inner {
  aspect-ratio: 4/3;
  position: relative;
  overflow: hidden;
  margin-bottom: var(--space-md);
  background: var(--mist);
}

.archive-card-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.archive-card-title {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 300;
  color: var(--ink);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.archive-card-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--stone);
  letter-spacing: 0.06em;
  display: flex;
  gap: var(--space-sm);
}

.archive-card-type::after,
.archive-card-location::after {
  content: "·";
  margin-left: var(--space-sm);
  opacity: 0.5;
}

.archive-card-type:last-child::after,
.archive-card-location:last-child::after {
  display: none;
}

/* ==========================================================================
   About Page
   ========================================================================== */

.about-page {
  padding: var(--space-4xl) 40px var(--space-4xl);
  margin-top: 80px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.about-page-content {
  font-size: 15px;
  line-height: 1.7;
}

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

.about-page-list {
  list-style: none;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.about-page-list li {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--stone);
  letter-spacing: 0.06em;
  margin-bottom: var(--space-sm);
}

/* ==========================================================================
   Contact Page
   ========================================================================== */

.contact-page {
  padding: var(--space-4xl) 40px var(--space-4xl);
  margin-top: 80px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.contact-form-simple {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.form-group-simple {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-group-simple label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--stone);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.form-group-simple input,
.form-group-simple textarea {
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--ink);
  background: none;
  border: none;
  border-bottom: 1px solid var(--mist);
  padding: var(--space-xs) 0;
  transition: border-color 0.2s;
}

.form-group-simple input:focus,
.form-group-simple textarea:focus {
  outline: none;
  border-bottom-color: var(--rust);
}

.form-group-simple textarea {
  min-height: 120px;
  resize: vertical;
}

.submit-btn-simple {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
  background: var(--black);
  border: none;
  padding: var(--space-sm) var(--space-lg);
  cursor: pointer;
  align-self: flex-start;
  transition: opacity 0.2s;
}

.submit-btn-simple:hover {
  opacity: 0.9;
}

/* ==========================================================================
   Pieredze Summary (Homepage)
   ========================================================================== */

.pieredze-summary {
  padding: var(--space-4xl) 40px;
  background: var(--white);
  border-top: 1px solid var(--mist);
  border-bottom: 1px solid var(--mist);
}

.pieredze-summary-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.pieredze-title {
  font-family: var(--font-sans);
  font-size: 32px;
  font-weight: 300;
  letter-spacing: -0.02em;
  color: var(--black);
  line-height: 1.1;
  margin-bottom: var(--space-lg);
}

.pieredze-text {
  font-size: 15px;
  color: var(--ink);
  line-height: 1.7;
  max-width: 500px;
  margin: 0 auto var(--space-2xl);
}

.pieredze-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  margin-bottom: var(--space-2xl);
}

.pieredze-stat {
  background: var(--black);
  padding: 24px 20px;
  text-align: center;
}

.pieredze-stat:first-child {
  background: var(--rust);
}

.pieredze-stat-number {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 300;
  color: var(--white);
  display: block;
  line-height: 1;
  margin-bottom: 6px;
}

.pieredze-stat-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(245, 244, 240, 0.45);
}

.pieredze-timeline {
  margin-bottom: var(--space-2xl);
}

.timeline-years {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 2px;
  margin-bottom: 8px;
}

.timeline-year {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--stone);
  text-align: center;
  letter-spacing: 0.06em;
}

.timeline-bars {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 2px;
  height: 80px;
  align-items: end;
}

.timeline-bar {
  background: var(--black);
  transition: background 0.2s;
}

.timeline-bar:hover {
  background: var(--rust);
}

.pieredze-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--stone);
  text-decoration: none;
  transition: color 0.2s;
}

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

.pieredze-link svg {
  transition: transform 0.2s;
}

.pieredze-link:hover svg {
  transform: translateX(4px);
}

@media (max-width: 768px) {
  .pieredze-summary {
    padding: 60px 20px;
  }

  .pieredze-title {
    font-size: 24px;
  }

  .pieredze-stats {
    grid-template-columns: 1fr 1fr;
  }

  .timeline-years,
  .timeline-bars {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

/* ==========================================================================
   Project Images & Slider
   ========================================================================== */

.project-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  background: var(--mist); /* Fallback background while loading */
}

.featured-card:hover .project-image,
.archive-card:hover .project-image {
  transform: scale(1.02);
}

.project-image-slider {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--mist); /* Fallback background while loading */
}

.slider-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.5s ease;
  display: block;
}

.slider-image.active {
  opacity: 1;
}

.slider-next {
  position: absolute;
  top: 50%;
  right: 16px;
  transform: translateY(-50%);
  background: rgba(26, 26, 24, 0.7);
  color: var(--white);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-family: var(--font-sans);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    background 0.2s,
    transform 0.2s,
    opacity 0.2s;
  z-index: 10;
  opacity: 0.8;
}

.slider-next:hover {
  background: rgba(26, 26, 24, 0.9);
  transform: translateY(-50%) scale(1.1);
  opacity: 1;
}

.slider-next:focus {
  outline: 2px solid var(--rust);
  outline-offset: 2px;
}

/* Ensure images always fill their containers */
.featured-card-inner,
.archive-card-inner {
  position: relative;
  overflow: hidden;
}

.featured-card-inner img,
.archive-card-inner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Responsive adjustments for project images */
@media (max-width: 768px) {
  .archive-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .slider-next {
    width: 36px;
    height: 36px;
    font-size: 16px;
    right: 12px;
    opacity: 0.9; /* More visible on mobile */
  }

  /* Better touch targets on mobile */
  .slider-next:active {
    transform: translateY(-50%) scale(0.95);
  }
}

/* Extra small devices */
@media (max-width: 480px) {
  .slider-next {
    width: 32px;
    height: 32px;
    font-size: 14px;
    right: 8px;
  }
}

/* Prevent layout shift when images load */
.featured-card-inner,
.archive-card-inner {
  aspect-ratio: 4/3;
}

.featured-card:first-child .featured-card-inner {
  aspect-ratio: unset;
  min-height: 540px;
}

@media (max-width: 768px) {
  .featured-card:first-child .featured-card-inner {
    min-height: 340px;
  }
}