/*
Theme Name: Project 2
Theme URI: https://dgl233.omedvedev.imgd.ca/project-2
Author: Oleg Medvedev
Author URI: https://github.com/olegmedv
Description: A classic WordPress portfolio theme for DGL-233 Project 2. Clean, modern design with Inter font and blue color palette.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.9
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: project2
Tags: portfolio, custom-logo, custom-menu, featured-images, theme-options
*/

/* ============================================
   CSS RESET (Josh W. Comeau)
   ============================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

body {
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

input,
button,
textarea,
select {
  font: inherit;
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
  overflow-wrap: break-word;
}

/* ============================================
   CUSTOM PROPERTIES
   ============================================ */
:root {
  --color-primary: #1a365d;
  --color-secondary: #2b6cb0;
  --color-accent: #4299e1;
  --color-contrast: #1a202c;
  --color-muted: #718096;
  --color-white: #ffffff;
  --color-light: #f7fafc;
  --color-card: #edf2f7;
  --color-dark: #1a202c;
  --color-border: #e2e8f0;
  --color-footer-text: #a0aec0;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;

  --container-max: 984px;
  --container-pad: 1.25rem;
  --section-pad: 4rem 0;
  --gap: 1.5rem;

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

/* ============================================
   BASE
   ============================================ */
body {
  font-family: var(--font-family);
  font-weight: var(--fw-regular);
  color: var(--color-contrast);
  background-color: var(--color-white);
  font-size: 1rem;
  line-height: 1.6;
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--fw-bold);
  color: var(--color-primary);
  line-height: 1.2;
}

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

.section {
  padding: var(--section-pad);
}

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

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

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

.section__title {
  font-size: 1.75rem;
  text-align: center;
  margin-bottom: 2.5rem;
}

.section__title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background-color: var(--color-secondary);
  border-radius: 2px;
  margin: 0.75rem auto 0;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: var(--fw-medium);
  font-size: 0.9375rem;
  text-align: center;
  cursor: pointer;
  border: none;
  transition: background-color 0.2s ease, transform 0.1s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

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

.btn--primary:hover {
  background-color: #2a4a7f;
  color: var(--color-white);
}

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

.btn--secondary:hover {
  background-color: #3b7cc0;
  color: var(--color-white);
}

/* ============================================
   SCREEN READER TEXT (a11y)
   ============================================ */
.screen-reader-text {
  clip: rect(1px, 1px, 1px, 1px);
  position: absolute !important;
  height: 1px;
  width: 1px;
  overflow: hidden;
  word-wrap: normal !important;
}

.screen-reader-text:focus {
  background-color: var(--color-light);
  border-radius: 3px;
  box-shadow: 0 0 2px 2px rgba(0, 0, 0, 0.6);
  clip: auto !important;
  color: var(--color-primary);
  display: block;
  font-size: 0.875rem;
  font-weight: var(--fw-bold);
  height: auto;
  left: 5px;
  line-height: normal;
  padding: 15px 23px 14px;
  text-decoration: none;
  top: 5px;
  width: auto;
  z-index: 100000;
}

/* ============================================
   HEADER (mobile-first: stacked)
   ============================================ */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.site-header__logo a {
  font-size: 1.25rem;
  font-weight: var(--fw-bold);
  color: var(--color-primary);
}

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

.site-header__logo img {
  max-height: 40px;
  width: auto;
}

/* Mobile nav: hidden by default */
.site-header__nav {
  display: none;
  position: absolute;
  top: 70px;
  left: 0;
  right: 0;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem var(--container-pad);
}

.site-header__nav.is-open {
  display: block;
}

.site-header__nav .menu {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.site-header__nav .menu li a {
  display: block;
  font-weight: var(--fw-medium);
  color: var(--color-contrast);
  font-size: 1rem;
  padding: 0.75rem 0;
}

.site-header__nav .menu li a:hover,
.site-header__nav .menu li.current-menu-item a,
.site-header__nav .menu li.current_page_item a {
  color: var(--color-secondary);
}

/* Hamburger toggle */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-contrast);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* ============================================
   HERO (mobile-first: stacked)
   ============================================ */
.hero {
  background-color: var(--color-light);
  padding: 3rem 0;
}

.hero__image {
  max-width: 280px;
  margin: 0 auto 2rem;
}

.hero__image img {
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-border);
  width: 100%;
  height: auto;
}

.hero__title {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.hero__subtitle {
  font-size: 1.25rem;
  font-weight: var(--fw-semibold);
  color: var(--color-secondary);
  margin-bottom: 1.25rem;
}

.hero__description {
  color: var(--color-muted);
  font-size: 1rem;
  margin-bottom: 1.5rem;
}

.hero__buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ============================================
   ABOUT (mobile-first: stacked)
   ============================================ */
.about {
  padding: var(--section-pad);
}

.about__text {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-contrast);
  margin-bottom: 2rem;
}

.about__facts {
  background-color: var(--color-light);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.about__facts h3 {
  font-size: 0.9375rem;
  font-weight: var(--fw-semibold);
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.about__facts ul {
  list-style: none;
  padding: 0;
}

.about__facts li {
  font-size: 0.875rem;
  color: var(--color-contrast);
  padding: 0.35rem 0;
}

/* ============================================
   SKILLS (mobile-first: 1-col grid)
   ============================================ */
.skills {
  background-color: var(--color-light);
  padding: var(--section-pad);
}

.skills__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.skill-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.skill-card--primary::before { background-color: var(--color-primary); }
.skill-card--secondary::before { background-color: var(--color-secondary); }
.skill-card--accent::before { background-color: var(--color-accent); }

.skill-card h3 {
  font-size: 1.0625rem;
  font-weight: var(--fw-semibold);
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 1rem;
  padding-top: 0.5rem;
}

.skill-card ul {
  list-style: none;
  padding: 0;
}

.skill-card li {
  font-size: 0.875rem;
  color: var(--color-contrast);
  padding: 0.25rem 0;
}

/* ============================================
   EXPERIENCE
   ============================================ */
.experience {
  padding: var(--section-pad);
}

.experience__list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.experience-card {
  background-color: var(--color-light);
  padding: 1.25rem 1.5rem;
  border-left: 4px solid var(--color-primary);
}

.experience-card h3 {
  font-size: 1rem;
  font-weight: var(--fw-semibold);
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.experience-card__meta {
  font-size: 0.8125rem;
  color: var(--color-muted);
  margin-bottom: 0.25rem;
}

.experience-card__desc {
  font-size: 0.8125rem;
  color: var(--color-contrast);
}

/* ============================================
   EDUCATION (mobile-first: 1-col grid)
   ============================================ */
.education {
  background-color: var(--color-light);
  padding: var(--section-pad);
}

.education__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.education-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
}

.education-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.education-card--accent::before { background-color: var(--color-accent); }
.education-card--primary::before { background-color: var(--color-primary); }

.education-card h3 {
  font-size: 1.0625rem;
  font-weight: var(--fw-semibold);
  color: var(--color-primary);
  padding-top: 0.25rem;
}

.education-card__program {
  font-size: 0.875rem;
  color: var(--color-contrast);
  margin-top: 0.25rem;
}

.education-card__meta {
  font-size: 0.8125rem;
  color: var(--color-muted);
  margin-top: 0.25rem;
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta {
  background-color: var(--color-primary);
  padding: 4rem 0;
  text-align: center;
}

.cta h2 {
  color: var(--color-white);
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.cta p {
  color: var(--color-footer-text);
  font-size: 1.0625rem;
  margin-bottom: 2rem;
}

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

.cta .btn:hover {
  background-color: var(--color-light);
  color: var(--color-primary);
}

/* ============================================
   CONTACT PAGE (mobile-first: stacked)
   ============================================ */
.contact-hero {
  background-color: var(--color-light);
  padding: 3rem 0;
  text-align: center;
}

.contact-hero h1 {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.contact-hero p {
  color: var(--color-muted);
  font-size: 1.0625rem;
}

.contact-content {
  padding: var(--section-pad);
}

.contact-info {
  margin-bottom: 2rem;
}

.contact-info h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.contact-info ul {
  list-style: none;
  padding: 0;
}

.contact-info li {
  padding: 0.5rem 0;
  font-size: 0.9375rem;
  color: var(--color-contrast);
}

.contact-form .wpcf7-form label,
.contact-form label {
  display: block;
  font-size: 0.875rem;
  font-weight: var(--fw-medium);
  color: var(--color-contrast);
  margin-bottom: 0.25rem;
}

.contact-form .wpcf7-form input[type="text"],
.contact-form .wpcf7-form input[type="email"],
.contact-form .wpcf7-form textarea,
.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-light);
  font-family: var(--font-family);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.15);
}

.contact-form input[type="submit"],
.contact-form .wpcf7-submit {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 0.75rem 2rem;
  border: none;
  border-radius: var(--radius-sm);
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.contact-form input[type="submit"]:hover,
.contact-form .wpcf7-submit:hover {
  background-color: #2a4a7f;
}

/* ============================================
   PROJECT ARCHIVE (mobile-first: 1-col grid)
   ============================================ */
.archive-hero {
  background-color: var(--color-light);
  padding: 3rem 0;
  text-align: center;
}

.archive-hero h1 {
  font-size: 2rem;
  color: var(--color-primary);
}

.projects-section {
  padding: var(--section-pad);
}

.project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.project-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.project-card__image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

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

.project-card__content {
  padding: 1.25rem;
}

.project-card__title {
  font-size: 1.125rem;
  font-weight: var(--fw-semibold);
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.project-card__title a {
  color: inherit;
}

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

.project-card__excerpt {
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* ============================================
   SINGLE PROJECT
   ============================================ */
.project-hero {
  background-color: var(--color-light);
  padding: 3rem 0;
}

.project-hero img {
  border-radius: var(--radius-lg);
  width: 100%;
  height: auto;
}

.project-content {
  padding: var(--section-pad);
}

.project-content h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.project-meta {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.project-meta__item {
  font-size: 0.875rem;
}

.project-meta__label {
  font-weight: var(--fw-semibold);
  color: var(--color-primary);
}

.project-meta__value {
  color: var(--color-muted);
}

.project-body {
  font-size: 1rem;
  line-height: 1.8;
}

.project-body img {
  border-radius: var(--radius-md);
  margin: 1.5rem 0;
}

.post-nav {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
  margin-top: 3rem;
}

.post-nav a {
  font-weight: var(--fw-medium);
  font-size: 0.9375rem;
}

.post-nav__label {
  font-size: 0.75rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================
   404 PAGE
   ============================================ */
.error-404 {
  background-color: var(--color-light);
  padding: 4rem 0;
  text-align: center;
  min-height: 60vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.error-404__bg {
  position: absolute;
  font-size: 10rem;
  font-weight: 900;
  color: var(--color-border);
  opacity: 0.4;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 0;
  user-select: none;
  font-family: var(--font-family);
}

.error-404 .container {
  position: relative;
  z-index: 1;
}

.error-404__code {
  font-size: 5rem;
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.error-404__title {
  font-size: 1.75rem;
  color: var(--color-contrast);
  margin-bottom: 1rem;
}

.error-404__desc {
  color: var(--color-muted);
  font-size: 1.0625rem;
  max-width: 500px;
  margin: 0 auto 2rem;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background-color: var(--color-dark);
  color: var(--color-white);
  padding: 2.5rem 0 1.5rem;
}

.site-footer__top {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.site-footer__brand h3 {
  font-size: 1.25rem;
  font-weight: var(--fw-semibold);
  color: var(--color-white);
  margin-bottom: 0.25rem;
}

.site-footer__brand p {
  font-size: 0.875rem;
  color: var(--color-footer-text);
}

.site-footer__social {
  display: flex;
  gap: 1.5rem;
}

.site-footer__social a {
  font-size: 0.875rem;
  font-weight: var(--fw-medium);
  color: var(--color-footer-text);
}

.site-footer__social a:hover {
  color: var(--color-white);
}

.site-footer__nav .menu {
  list-style: none;
  padding: 0;
  display: flex;
  gap: 1.5rem;
}

.site-footer__nav .menu li a {
  font-size: 0.875rem;
  color: var(--color-footer-text);
}

.site-footer__nav .menu li a:hover {
  color: var(--color-white);
}

.site-footer__copyright {
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-muted);
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* WP Admin Bar offset */
body.admin-bar .site-header {
  top: 32px;
}

/* ============================================
   MEDIA QUERIES (min-width = mobile-first)
   ============================================ */

/* --- Tablet: 768px --- */
@media (min-width: 768px) {
  :root {
    --container-pad: 2rem;
  }

  .section__title {
    font-size: 2rem;
  }

  .site-header .container {
    height: 80px;
  }

  .site-header__logo a {
    font-size: 1.5rem;
  }

  .hero {
    padding: 4rem 0;
  }

  .hero__title {
    font-size: 2.5rem;
  }

  .hero__subtitle {
    font-size: 1.5rem;
  }

  .skills__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .education__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .post-nav {
    flex-direction: row;
    justify-content: space-between;
  }

  .error-404__bg {
    font-size: 14rem;
  }

  .error-404__code {
    font-size: 6rem;
  }

  .contact-hero h1,
  .archive-hero h1,
  .project-content h1 {
    font-size: 2.5rem;
  }
}

/* --- Desktop: 1024px --- */
@media (min-width: 1024px) {
  /* Header: show nav inline, hide toggle */
  .site-header__nav {
    display: block;
    position: static;
    border-bottom: none;
    padding: 0;
    background: none;
  }

  .site-header__nav .menu {
    flex-direction: row;
    gap: 2rem;
  }

  .site-header__nav .menu li a {
    padding: 0.5rem 0;
  }

  .nav-toggle {
    display: none;
  }

  /* Hero: side by side */
  .hero .container {
    display: flex;
    align-items: center;
    gap: 3rem;
  }

  .hero__content {
    flex: 1;
  }

  .hero__image {
    flex: 0 0 312px;
    margin: 0;
    max-width: none;
  }

  .hero__title {
    font-size: 3.25rem;
  }

  .hero__description {
    font-size: 1.0625rem;
  }

  /* About: side by side */
  .about .container {
    display: flex;
    gap: 3rem;
    align-items: flex-start;
  }

  .about__text {
    flex: 1;
    margin-bottom: 0;
  }

  .about__facts {
    flex: 0 0 380px;
  }

  /* Skills: 4 columns */
  .skills__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  /* Projects: 3 columns */
  .project-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Contact: side by side */
  .contact-content .container {
    display: flex;
    gap: 3rem;
  }

  .contact-info {
    flex: 0 0 300px;
    margin-bottom: 0;
  }

  .contact-form {
    flex: 1;
  }

  /* Footer: side by side */
  .site-footer__top {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }

  .error-404__bg {
    font-size: 18rem;
  }

  .error-404__code {
    font-size: 7.5rem;
  }

  .cta h2 {
    font-size: 2rem;
  }
}

@media screen and (max-width: 782px) {
  body.admin-bar .site-header {
    top: 46px;
  }
}