/*==================== PROFESSIONAL EMBEDDED ENGINEER PORTFOLIO ====================*/
:root {
  --header-height: 3.5rem;

  /* Primary Palette - Deep Blue Tech */
  --hue-color: 215;
  --primary-color: #3B82F6;
  --primary-color-alt: #2563EB;
  --primary-color-light: #60A5FA;
  --primary-color-rgb: 59, 130, 246;
  --accent-color: #06B6D4;
  --accent-rgb: 6, 182, 212;

  /* Neutral Colors - Light Mode */
  --title-color: #0F172A;
  --text-color: #475569;
  --text-color-light: #94A3B8;
  --input-color: #F1F5F9;
  --card-color: #FFFFFF;
  --card-border: rgba(59, 130, 246, 0.08);
  --body-color: #F8FAFC;
  --container-color: #FFFFFF;
  --shadow-color: rgba(15, 23, 42, 0.06);
  --shadow-strong: rgba(15, 23, 42, 0.12);
  --divider: rgba(15, 23, 42, 0.06);

  /* Typography */
  --body-font: 'Barlow', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono-font: 'Roboto Mono', 'Fira Code', monospace;
  --h1-font-size: 2.25rem;
  --h2-font-size: 1.5rem;
  --h3-font-size: 1.25rem;
  --normal-font-size: 1rem;
  --small-font-size: 0.875rem;
  --smaller-font-size: 0.8rem;

  /* Font weight */
  --font-medium: 500;
  --font-semi-bold: 600;
  --font-bold: 700;

  /* Margins */
  --mb-0-25: 0.25rem;
  --mb-0-5: 0.5rem;
  --mb-0-75: 0.75rem;
  --mb-1: 1rem;
  --mb-1-5: 1.5rem;
  --mb-2: 2rem;
  --mb-2-5: 2.5rem;
  --mb-3: 3rem;

  /* z-index */
  --z-tooltip: 10;
  --z-fixed: 100;
  --z-modal: 1000;

  /* Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-smooth: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ==================== DARK THEME ==================== */
.dark-theme {
  --primary-color: #60A5FA;
  --primary-color-alt: #3B82F6;
  --primary-color-light: #93C5FD;
  --primary-color-rgb: 96, 165, 250;
  --accent-color: #22D3EE;
  --accent-rgb: 34, 211, 238;

  --title-color: #F1F5F9;
  --text-color: #CBD5E1;
  --text-color-light: #64748B;
  --input-color: #1E293B;
  --card-color: #1E293B;
  --card-border: rgba(96, 165, 250, 0.15);
  --body-color: #0F172A;
  --container-color: #1E293B;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --shadow-strong: rgba(0, 0, 0, 0.5);
  --divider: rgba(248, 250, 252, 0.06);
}

.change-theme {
  font-size: 1.25rem;
  color: var(--text-color);
  margin-right: var(--mb-1);
  cursor: pointer;
  transition: var(--transition-base);
  padding: 0.25rem;
  border-radius: 50%;
}

.change-theme:hover {
  color: var(--primary-color);
  transform: rotate(15deg);
}

/* Font size for large devices */
@media screen and (min-width: 968px) {
  :root {
    --h1-font-size: 2.75rem;
    --h2-font-size: 1.75rem;
    --h3-font-size: 1.25rem;
    --normal-font-size: 1.0625rem;
    --small-font-size: 0.9375rem;
    --smaller-font-size: 0.8125rem;
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0 0 var(--header-height) 0;
  font-family: var(--body-font);
  font-size: var(--normal-font-size);
  background-color: var(--body-color);
  color: var(--text-color);
  line-height: 1.7;
  transition: background-color var(--transition-base), color var(--transition-base);
}

h1, h2, h3, h4 {
  color: var(--title-color);
  font-weight: var(--font-bold);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

ul {
  list-style: none;
}

a {
  text-decoration: none;
  color: var(--primary-color);
  transition: var(--transition-base);
}

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

button, input, textarea {
  font-family: var(--body-font);
  font-size: var(--normal-font-size);
}

button {
  cursor: pointer;
  border: none;
  outline: none;
}

/* ==================== REUSABLE CSS ==================== */
.section {
  padding: 5rem 0 3rem;
}

.section__title {
  font-size: var(--h1-font-size);
  color: var(--title-color);
  margin-bottom: var(--mb-0-5);
  text-align: center;
  position: relative;
}

.section__subtitle {
  display: block;
  font-size: var(--small-font-size);
  margin-bottom: var(--mb-3);
  color: var(--text-color-light);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: var(--font-medium);
}

.container {
  max-width: 1024px;
  margin-left: var(--mb-1-5);
  margin-right: var(--mb-1-5);
}

.grid {
  display: grid;
  gap: 1.5rem;
}

/* ==================== HEADER ==================== */
.header {
  width: 100%;
  position: fixed;
  bottom: 0;
  left: 0;
  z-index: var(--z-fixed);
  background-color: var(--body-color);
  box-shadow: 0 -1px 12px var(--shadow-color);
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav {
  max-width: 1024px;
  height: var(--header-height);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__logo {
  color: var(--title-color);
  font-weight: var(--font-bold);
  font-size: 1.125rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  letter-spacing: -0.01em;
  transition: var(--transition-base);
}

.nav__logo:hover {
  color: var(--primary-color);
}

.nav__logo i {
  color: var(--primary-color);
  font-size: 1.35rem;
}

.nav__toggle {
  color: var(--title-color);
  font-weight: var(--font-medium);
  font-size: 1.15rem;
  cursor: pointer;
  transition: var(--transition-base);
}

.nav__toggle:hover {
  color: var(--primary-color);
}

.nav__list {
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.nav__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: var(--smaller-font-size);
  color: var(--text-color);
  font-weight: var(--font-medium);
  transition: var(--transition-base);
}

.nav__link:hover {
  color: var(--primary-color);
}

.nav__icon {
  font-size: 1.2rem;
}

.nav__close {
  position: absolute;
  right: 1.3rem;
  bottom: 0.5rem;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--title-color);
  transition: var(--transition-base);
}

.nav__close:hover {
  color: var(--primary-color);
}

/* Mobile nav menu */
@media screen and (max-width: 767px) {
  .nav__menu {
    position: fixed;
    bottom: -100%;
    left: 0;
    width: 100%;
    background-color: var(--body-color);
    padding: 2rem 1.5rem 4rem;
    box-shadow: 0 -1px 16px var(--shadow-strong);
    border-radius: 1.5rem 1.5rem 0 0;
    transition: var(--transition-smooth);
    z-index: var(--z-fixed);
  }
}

/* Show menu */
.show-menu {
  bottom: 0;
}

/* Active link */
.active-link {
  color: var(--primary-color);
}

/* Change background header */
.scroll-header {
  box-shadow: 0 -1px 16px var(--shadow-strong);
}

/* ==================== HOME ==================== */
.home__container {
  gap: 1.5rem;
}

.home__content {
  grid-template-columns: 0.5fr 3fr;
  padding-top: 3.5rem;
  align-items: center;
}

.home__social {
  display: grid;
  grid-template-columns: max-content;
  row-gap: 1rem;
}

.home__social-icon {
  font-size: 1.25rem;
  color: var(--text-color-light);
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--divider);
  background-color: var(--container-color);
}

.home__social-icon:hover {
  color: var(--primary-color);
  border-color: var(--primary-color);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(var(--primary-color-rgb), 0.15);
}

.home__data {
  grid-column: 1/3;
}

.home__title {
  font-size: var(--h1-font-size);
  margin-bottom: var(--mb-0-5);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.home__subtitle {
  font-size: var(--h3-font-size);
  color: var(--primary-color);
  font-weight: var(--font-medium);
  margin-bottom: var(--mb-1);
  font-family: var(--mono-font);
  font-size: var(--small-font-size);
}

.home__description {
  margin-bottom: var(--mb-2-5);
  color: var(--text-color);
  max-width: 540px;
  line-height: 1.8;
}

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

.home__scroll {
  display: none;
}

.home__scroll-button {
  color: var(--primary-color);
  transition: var(--transition-base);
}

.home__scroll-button:hover {
  transform: translateY(0.25rem);
}

.home__scroll-mouse {
  font-size: 2rem;
}

.home__scroll-name {
  font-size: var(--small-font-size);
  color: var(--text-color);
  font-weight: var(--font-medium);
  margin-right: var(--mb-0-25);
}

.home__scroll-arrow {
  font-size: 1.25rem;
}

/* Typewriter cursor */
#typewriter {
  border-right: 2px solid var(--primary-color);
  padding-right: 4px;
  animation: cursorBlink 0.7s step-end infinite;
  min-height: 1.5em;
}

@keyframes cursorBlink {
  0%, 100% { border-right-color: var(--primary-color); }
  50% { border-right-color: transparent; }
}

/* ==================== BUTTONS ==================== */
.button {
  display: inline-flex;
  align-items: center;
  background-color: var(--primary-color);
  color: #FFFFFF;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-sm);
  font-weight: var(--font-semi-bold);
  font-size: var(--small-font-size);
  transition: var(--transition-smooth);
  letter-spacing: 0.01em;
}

.button:hover {
  background-color: var(--primary-color-alt);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(var(--primary-color-rgb), 0.3);
}

.button__icon {
  font-size: 1.15rem;
  margin-left: var(--mb-0-5);
  transition: var(--transition-base);
}

.button:hover .button__icon {
  transform: translateX(3px);
}

.button--flex {
  display: inline-flex;
  align-items: center;
}

.button--outline {
  background-color: transparent;
  border: 1.5px solid var(--primary-color);
  color: var(--primary-color);
}

.button--outline:hover {
  background-color: var(--primary-color);
  color: #FFFFFF;
}

/* ==================== ABOUT ==================== */
.about__container {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.about__description {
  color: var(--text-color);
  line-height: 1.9;
  font-size: var(--normal-font-size);
}

.about__info {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-top: 2.5rem;
}

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

.about__info-title {
  font-size: var(--h1-font-size);
  font-weight: var(--font-bold);
  color: var(--primary-color);
  display: block;
  line-height: 1;
}

.about__info-name {
  font-size: var(--smaller-font-size);
  color: var(--text-color-light);
  display: block;
  margin-top: 0.35rem;
  line-height: 1.4;
}

/* ==================== EXPERIENCE ==================== */
.experience__container {
  max-width: 800px;
  margin: 0 auto;
}

.experience__timeline {
  position: relative;
  padding-left: 2rem;
}

.experience__timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary-color), var(--divider));
}

.experience__item {
  position: relative;
  margin-bottom: 2rem;
}

.experience__marker {
  position: absolute;
  left: -2rem;
  top: 1.5rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background-color: var(--body-color);
  border: 2px solid var(--text-color-light);
  z-index: 1;
}

.experience__marker--active {
  border-color: var(--primary-color);
  background-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(var(--primary-color-rgb), 0.2);
}

.experience__card {
  background-color: var(--card-color);
  border: 1px solid var(--divider);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: 0 1px 3px var(--shadow-color);
}

.experience__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.experience__title {
  font-size: 1.05rem;
  font-weight: var(--font-semi-bold);
  color: var(--title-color);
  margin-bottom: 0.15rem;
}

.experience__company {
  font-size: var(--small-font-size);
  color: var(--primary-color);
  font-weight: var(--font-medium);
}

.experience__date {
  font-size: var(--smaller-font-size);
  color: var(--text-color-light);
  font-family: var(--mono-font);
  white-space: nowrap;
}

.experience__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.experience__list li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.5rem;
  font-size: var(--small-font-size);
  color: var(--text-color);
  line-height: 1.6;
}

.experience__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--primary-color);
  opacity: 0.6;
}

/* Education */
.experience__education {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--divider);
}

.experience__section-title {
  font-size: 1.1rem;
  color: var(--title-color);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.experience__section-title i {
  color: var(--primary-color);
}

.experience__edu-item {
  margin-bottom: 1.25rem;
  padding-left: 1rem;
  border-left: 2px solid var(--divider);
}

.experience__edu-degree {
  font-size: var(--normal-font-size);
  font-weight: var(--font-semi-bold);
  color: var(--title-color);
  margin-bottom: 0.15rem;
}

.experience__edu-school {
  font-size: var(--small-font-size);
  color: var(--text-color);
  display: block;
  margin-bottom: 0.15rem;
}

.experience__edu-date {
  font-size: var(--smaller-font-size);
  color: var(--text-color-light);
  font-family: var(--mono-font);
}

/* ==================== SKILLS ==================== */
.skills__container {
  position: relative;
}

.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.skills__card {
  background-color: var(--card-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: 0 1px 3px var(--shadow-color);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--divider);
}

.skills__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px var(--shadow-strong);
  border-color: rgba(var(--primary-color-rgb), 0.2);
}

.skills__card-header {
  display: flex;
  align-items: center;
  margin-bottom: 1.25rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--divider);
}

.skills__card .skills__icon {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-right: 0.75rem;
  transition: var(--transition-base);
  flex-shrink: 0;
}

.skills__card:hover .skills__icon {
  transform: scale(1.1);
}

.skills__card .skills__title {
  font-size: 1rem;
  font-weight: var(--font-semi-bold);
  color: var(--title-color);
  line-height: 1.3;
}

.skills__card-content {
  flex: 1;
}

.tech-data {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.tech-data-item {
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: var(--transition-base);
  background-color: transparent;
  border-left: 2px solid transparent;
}

.tech-data-item:hover {
  background-color: rgba(var(--primary-color-rgb), 0.04);
  border-left-color: var(--primary-color);
}

.tech-data-label {
  font-family: var(--mono-font);
  font-size: var(--smaller-font-size);
  color: var(--primary-color);
  margin-bottom: 0.2rem;
  display: block;
  font-weight: var(--font-medium);
}

.tech-data-label i {
  margin-right: 0.35rem;
  font-size: 0.85em;
}

.tech-data-value {
  font-size: var(--smaller-font-size);
  color: var(--text-color);
  line-height: 1.5;
}

/* Card-item base for hover effects */
.card-item {
  transition: var(--transition-smooth);
}

.card-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px var(--shadow-strong);
}

/* ==================== PROJECTS GRID ==================== */
.projects__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 2.5rem;
}

.filter__btn {
  padding: 0.45rem 1rem;
  border-radius: 2rem;
  border: 1px solid var(--divider);
  background: var(--card-color);
  color: var(--text-color);
  font-family: var(--body-font);
  font-size: var(--smaller-font-size);
  cursor: pointer;
  transition: var(--transition-base);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.filter__btn:hover,
.filter__btn.active-filter {
  background-color: var(--primary-color);
  color: #fff;
  border-color: var(--primary-color);
}

.filter__count {
  font-size: 0.65rem;
  background: rgba(255,255,255,0.2);
  border-radius: 1rem;
  padding: 0.05rem 0.4rem;
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.project__card {
  background-color: var(--card-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 1px solid var(--divider);
  box-shadow: 0 2px 8px var(--shadow-color);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.project__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px var(--shadow-strong);
  border-color: rgba(var(--primary-color-rgb), 0.2);
}

.project__card[style*="display: none"] {
  display: none !important;
}

.project__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.project__badge {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.65rem;
  border-radius: 1rem;
}

.badge--medical  { background: rgba(239,68,68,0.12);  color: #ef4444; }
.badge--iot      { background: rgba(34,197,94,0.12);  color: #22c55e; }
.badge--industrial { background: rgba(251,191,36,0.12); color: #f59e0b; }
.badge--wearable { background: rgba(129,140,248,0.12); color: #818cf8; }
.badge--personal { background: rgba(249,115,22,0.12); color: #f97316; }
.badge--rl       { background: rgba(6,182,212,0.12);  color: #06b6d4; }

.project__icon {
  font-size: 1.5rem;
  color: var(--primary-color);
  opacity: 0.6;
}

.project__title {
  font-size: 1rem;
  font-weight: var(--font-semi-bold);
  color: var(--title-color);
  line-height: 1.3;
}

.project__desc {
  font-size: var(--smaller-font-size);
  color: var(--text-color);
  line-height: 1.7;
  flex: 1;
}

.project__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.25rem;
}

.project__tags span {
  font-size: 0.65rem;
  font-family: var(--mono-font);
  background-color: var(--container-color);
  color: var(--primary-color);
  border: 1px solid var(--divider);
  border-radius: 0.25rem;
  padding: 0.15rem 0.5rem;
}

/* ==================== BLOG ==================== */
.blog__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.blog__card {
  background-color: var(--card-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  border: 1px solid var(--divider);
  box-shadow: 0 2px 8px var(--shadow-color);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.blog__card:hover {
  border-color: rgba(var(--primary-color-rgb), 0.2);
  box-shadow: 0 8px 24px var(--shadow-strong);
}

.blog__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.blog__tag {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.65rem;
  border-radius: 1rem;
}

.tag--rtos     { background: rgba(34,197,94,0.12);  color: #22c55e; }
.tag--ble      { background: rgba(129,140,248,0.12); color: #818cf8; }
.tag--medical  { background: rgba(239,68,68,0.12);  color: #ef4444; }
.tag--iot      { background: rgba(6,182,212,0.12);  color: #06b6d4; }
.tag--hardware { background: rgba(251,191,36,0.12); color: #f59e0b; }
.tag--tools    { background: rgba(168,85,247,0.12);  color: #a855f7; }

.blog__read-time {
  font-size: 0.7rem;
  color: var(--text-color-light);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.blog__title {
  font-size: 1.05rem;
  font-weight: var(--font-semi-bold);
  color: var(--title-color);
  line-height: 1.4;
}

.blog__excerpt {
  font-size: var(--smaller-font-size);
  color: var(--text-color);
  line-height: 1.75;
}

.blog__content {
  display: none;
}

.blog__content p {
  margin-bottom: 0.75rem;
}

.blog__content ul {
  padding-left: 1.25rem;
  margin-bottom: 0.75rem;
}

.blog__content li {
  margin-bottom: 0.5rem;
}

.blog__content strong {
  color: var(--title-color);
}

.blog__content code {
  font-family: var(--mono-font);
  font-size: 0.78rem;
  background: var(--container-color);
  border: 1px solid var(--divider);
  padding: 0.1rem 0.35rem;
  border-radius: 0.25rem;
  color: var(--primary-color);
}

/* ==================== CONTACT ==================== */
.contact__container {
  grid-template-columns: 1fr;
  row-gap: 2.5rem;
  padding: 2rem;
  border-radius: var(--radius-lg);
  background-color: var(--container-color);
  box-shadow: 0 2px 12px var(--shadow-color);
  border: 1px solid var(--divider);
}

.contact__information {
  display: flex;
  align-items: center;
  margin-bottom: var(--mb-1-5);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  background-color: var(--body-color);
  border: 1px solid var(--divider);
  transition: var(--transition-base);
}

.contact__information:hover {
  border-color: rgba(var(--primary-color-rgb), 0.2);
  box-shadow: 0 4px 12px var(--shadow-color);
}

.contact__icon {
  font-size: 1.25rem;
  color: var(--primary-color);
  margin-right: var(--mb-0-75);
  flex-shrink: 0;
}

.contact__title {
  font-size: var(--normal-font-size);
  font-weight: var(--font-semi-bold);
  color: var(--title-color);
  margin-bottom: 0.15rem;
}

.contact__subtitle {
  font-size: var(--small-font-size);
  color: var(--text-color);
}

.contact__subtitle a {
  color: var(--text-color);
  transition: var(--transition-base);
}

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

/* Contact form */
.contact__form {
  background-color: transparent;
}

.contact__inputs {
  display: grid;
  gap: 1.25rem;
}

.contact__content {
  position: relative;
  margin-bottom: 1rem;
}

.content__label {
  position: absolute;
  top: -0.65rem;
  left: 1rem;
  padding: 0 0.5rem;
  background-color: var(--container-color);
  color: var(--primary-color);
  font-size: var(--smaller-font-size);
  font-weight: var(--font-medium);
  z-index: 10;
  border-radius: 4px;
}

.contact__input {
  width: 100%;
  background-color: var(--body-color);
  color: var(--text-color);
  font-family: var(--body-font);
  font-size: var(--normal-font-size);
  border: 1.5px solid var(--divider);
  outline: none;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}

.contact__input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(var(--primary-color-rgb), 0.1);
}

.contact__input::placeholder {
  color: var(--text-color-light);
}

textarea.contact__input {
  resize: vertical;
  min-height: 130px;
}

/* Form actions */
.form__actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 0.5rem;
}

.form__actions button {
  margin-bottom: 1rem;
  min-width: 200px;
  justify-content: center;
}

/* Alert box */
.alert-box {
  padding: 0.85rem 1.25rem;
  margin-top: 0.75rem;
  border-radius: var(--radius-sm);
  text-align: center;
  font-size: var(--small-font-size);
  font-weight: var(--font-medium);
  animation: alertSlideIn 0.3s ease forwards;
}

@keyframes alertSlideIn {
  from { transform: translateY(8px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.alert-success {
  background-color: rgba(34, 197, 94, 0.1);
  color: #16A34A;
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.alert-error {
  background-color: rgba(239, 68, 68, 0.1);
  color: #DC2626;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* ==================== FOOTER ==================== */
.footer {
  padding-top: 2rem;
}

.footer__container {
  row-gap: 2.5rem;
}

.footer__bg {
  background-color: var(--container-color);
  padding: 2.5rem 0 2rem;
  border-top: 1px solid var(--divider);
}

.footer__title {
  font-size: var(--h2-font-size);
  margin-bottom: 0.25rem;
  color: var(--title-color);
}

.footer__subtitle {
  font-size: var(--smaller-font-size);
  color: var(--text-color-light);
  margin-bottom: 0.5rem;
  display: block;
  font-family: var(--mono-font);
}

.footer__links {
  display: flex;
  flex-direction: column;
  row-gap: 1.25rem;
}

.footer__link {
  color: var(--text-color);
  font-weight: var(--font-medium);
  font-size: var(--small-font-size);
  transition: var(--transition-base);
}

.footer__link:hover {
  color: var(--primary-color);
}

.footer__socials {
  font-size: 1.25rem;
  display: flex;
  column-gap: 1rem;
}

.footer__social {
  color: var(--text-color-light);
  transition: var(--transition-base);
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--divider);
}

.footer__social:hover {
  color: var(--primary-color);
  border-color: var(--primary-color);
  transform: translateY(-2px);
}

.footer__copy {
  font-size: var(--smaller-font-size);
  text-align: center;
  color: var(--text-color-light);
  margin-top: 2.5rem;
}

/* ==================== SCROLL UP ==================== */
.scrollup {
  position: fixed;
  right: 1.25rem;
  bottom: 5rem;
  background-color: var(--primary-color);
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius-sm);
  z-index: var(--z-tooltip);
  transition: var(--transition-smooth);
  opacity: 0;
  visibility: hidden;
}

.show-scroll {
  bottom: 5rem;
  opacity: 0.9;
  visibility: visible;
}

.scrollup:hover {
  background-color: var(--primary-color-alt);
  opacity: 1;
  transform: translateY(-3px);
}

.scrollup__icon {
  font-size: 1.35rem;
  color: #FFFFFF;
}

/* ==================== SCROLLBAR ==================== */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--body-color);
}

::-webkit-scrollbar-thumb {
  background: var(--text-color-light);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-color);
}

/* ==================== MEDIA QUERIES ==================== */

/* Small devices */
@media screen and (max-width: 350px) {
  .container {
    margin-left: var(--mb-1);
    margin-right: var(--mb-1);
  }

  .nav__menu {
    padding: 2rem 0.25rem 4rem;
  }

  .nav__list {
    column-gap: 0;
  }

  .home__content {
    grid-template-columns: 0.25fr 3fr;
  }

  .home__buttons {
    flex-direction: column;
  }

  .about__info {
    flex-direction: column;
    gap: 1.5rem;
  }

  .skills__grid {
    grid-template-columns: 1fr;
  }
}

/* Medium devices */
@media screen and (min-width: 568px) {
  .home__content {
    grid-template-columns: max-content 1fr 1fr;
  }

  .home__data {
    grid-column: initial;
  }

  .about__info {
    gap: 4rem;
  }

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

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

/* Large devices */
@media screen and (min-width: 768px) {
  .container {
    margin-left: auto;
    margin-right: auto;
  }

  body {
    margin: 0;
  }

  .section {
    padding: 6rem 0 3rem;
  }

  .section__subtitle {
    margin-bottom: var(--mb-3);
  }

  .header {
    top: 0;
    bottom: initial;
    background-color: rgba(248, 250, 252, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }

  .dark-theme .header {
    background-color: rgba(15, 23, 42, 0.85);
  }

  .header,
  .main,
  .footer__container {
    padding: 0 1rem;
  }

  .nav {
    height: calc(var(--header-height) + 1rem);
    column-gap: 1rem;
  }

  .nav__icon,
  .nav__close,
  .nav__toggle {
    display: none;
  }

  .nav__list {
    display: flex;
    column-gap: 2.5rem;
  }

  .nav__menu {
    margin-left: auto;
  }

  .home__scroll {
    display: block;
  }

  .home__container {
    row-gap: 5rem;
  }

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

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

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

  .contact__container {
    grid-template-columns: 5fr 7fr;
    column-gap: 2rem;
  }

  .footer__container {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer__bg {
    padding: 3rem 0 2.5rem;
  }

  .footer__links {
    flex-direction: row;
    column-gap: 2rem;
  }

  .footer__socials {
    justify-self: flex-end;
  }

  .footer__copy {
    margin-top: 3rem;
  }
}

/* Extra large devices */
@media screen and (min-width: 1024px) {
  .container {
    max-width: 1024px;
  }

  .home__social {
    transform: translateX(-3rem);
  }

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

  .projects__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .blog__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ==================== SELECTION ==================== */
::selection {
  background-color: rgba(var(--primary-color-rgb), 0.15);
  color: var(--primary-color);
}

/* ==================== FOCUS VISIBLE ==================== */
:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  border-radius: 2px;
}