/* === GOOGLE FONTS === */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* === CSS VARIABLES === */
:root {
  /* Colors */
  --bg-color-light: #F7F9FC;
  --bg-color-dark: #1A1A1A;
  --card-color-light: #FFFFFF;
  --card-color-dark: #2C2C2C;
  --text-color-light: #1A1A1A;
  --text-color-dark: #F0F0F0;
  --primary-color: #007BFF;
  --primary-hover-color: #0056b3;
  --border-color-light: #E0E0E0;
  --border-color-dark: #444444;
  --badge-bg-light: #E9ECEF;
  --badge-text-light: #495057;
  --badge-bg-dark: #3A3A3A;
  --badge-text-dark: #E0E0E0;

  /* Typography */
  --font-family: 'Inter', sans-serif;
  --h1-size: 2.5rem;
  --h2-size: 1.75rem;
  --h3-size: 1.25rem;
  --normal-size: 1rem;
  --small-size: 0.875rem;

  /* Transitions & Shadows */
  --transition-speed: 0.3s ease;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  --shadow-dark: 0 4px 12px rgba(0, 0, 0, 0.2);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--normal-size);
  background-color: var(--bg-color-light);
  color: var(--text-color-light);
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

body.dark-mode {
  background-color: var(--bg-color-dark);
  color: var(--text-color-dark);
}

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

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

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

h1, h2, h3 {
  font-weight: 700;
}

.container {
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 1.5rem;
}

.section {
  padding: 6rem 0 2rem;
}

.section__title {
  font-size: var(--h2-size);
  text-align: center;
  margin-bottom: 3rem;
}

/* === HEADER & NAVBAR === */
.header {
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
  border-bottom: 1px solid var(--border-color-light);
}

body.dark-mode .header {
  background-color: rgba(26, 26, 26, 0.8);
  border-bottom: 1px solid var(--border-color-dark);
}

.nav {
  height: 4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-color-light);
}

body.dark-mode .nav__logo {
  color: var(--text-color-dark);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav__link {
  font-weight: 500;
  color: var(--text-color-light);
  position: relative;
  padding: 0.5rem 0;
}

body.dark-mode .nav__link {
  color: var(--text-color-dark);
}

.nav__link.active {
  font-weight: 700;
  color: var(--primary-color);
}

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

.nav__actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.theme-toggle,
.nav__toggle,
.nav__close {
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-color-light);
    transition: color var(--transition-speed);
}

body.dark-mode .theme-toggle,
body.dark-mode .nav__toggle,
body.dark-mode .nav__close {
    color: var(--text-color-dark);
}

.nav__toggle {
    display: none; /* Hidden on desktop */
}

/* === HERO SECTION === */
.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 100vh;
}

.hero__content {
    max-width: 700px;
}

.hero__title {
  font-size: var(--h1-size);
  margin-bottom: 0.5rem;
}

.hero__role {
  font-size: var(--h3-size);
  font-weight: 500;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.hero__slogan {
  font-size: var(--normal-size);
  margin-bottom: 2rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.hero__buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

/* === BUTTONS === */
.button {
  display: inline-block;
  padding: 0.8rem 1.8rem;
  border-radius: 8px;
  font-weight: 500;
  border: 2px solid transparent;
  transition: var(--transition-speed);
}

.button--primary {
  background-color: var(--primary-color);
  color: #fff;
}

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

.button--secondary {
  background-color: transparent;
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.button--secondary:hover {
  background-color: var(--primary-color);
  color: #fff;
}

/* === SKILLS & BADGES === */
.skills__container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.badge {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: var(--small-size);
    font-weight: 500;
    background-color: var(--badge-bg-light);
    color: var(--badge-text-light);
}

body.dark-mode .badge {
    background-color: var(--badge-bg-dark);
    color: var(--badge-text-dark);
}

/* === STATS SECTION === */
.stats__container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background-color: var(--card-color-light);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color-light);
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

body.dark-mode .stat-card {
    background-color: var(--card-color-dark);
    border-color: var(--border-color-dark);
    box-shadow: var(--shadow-dark);
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-card__number {
    font-size: var(--h1-size);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-card__label {
    font-size: var(--normal-size);
    font-weight: 500;
}

/* === ABOUT PAGE === */
.about__container {
    display: grid;
    gap: 4rem;
}

.about__text p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

.tech-group {
    margin-bottom: 2rem;
}

.tech-group__title {
    font-size: var(--h3-size);
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
    display: inline-block;
}

.tech-group .skills__container {
    justify-content: flex-start;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 3px;
    background-color: var(--border-color-light);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -1.5px;
}

body.dark-mode .timeline::after {
    background-color: var(--border-color-dark);
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    width: 50%;
}

.timeline-item:nth-child(odd) {
    left: 0;
}

.timeline-item:nth-child(even) {
    left: 50%;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    right: -10px;
    background-color: var(--bg-color-light);
    border: 4px solid var(--primary-color);
    top: 20px;
    border-radius: 50%;
    z-index: 1;
}

body.dark-mode .timeline-item::after {
    background-color: var(--bg-color-dark);
}

.timeline-item:nth-child(even)::after {
    left: -10px;
}

.timeline-content {
    padding: 1.5rem;
    background-color: var(--card-color-light);
    border: 1px solid var(--border-color-light);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

body.dark-mode .timeline-content {
    background-color: var(--card-color-dark);
    border-color: var(--border-color-dark);
    box-shadow: var(--shadow-dark);
}

.timeline-year {
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* === PROJECTS PAGE === */
.projects__container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--card-color-light);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color-light);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    transition: var(--transition-speed);
}

body.dark-mode .project-card {
    background-color: var(--card-color-dark);
    border-color: var(--border-color-dark);
    box-shadow: var(--shadow-dark);
}

.project-card:hover {
    transform: translateY(-5px);
}

.project-card__content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-card__title {
    font-size: var(--h3-size);
    margin-bottom: 0.5rem;
}

.project-card__description {
    margin-bottom: 1.5rem;
    flex-grow: 1;
    line-height: 1.6;
}

.project-card__tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.project-card__button {
    margin-top: auto;
    align-self: flex-start;
}

/* === FOOTER === */
.footer {
    padding: 4rem 0 2rem;
    text-align: center;
}

.footer__container {
    border-top: 1px solid var(--border-color-light);
    padding-top: 2rem;
}

body.dark-mode .footer__container {
    border-top-color: var(--border-color-dark);
}

.footer__social {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.footer__social-link {
    font-size: 1.5rem;
    color: var(--text-color-light);
}

body.dark-mode .footer__social-link {
    color: var(--text-color-dark);
}

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

.footer__copy {
    font-size: var(--small-size);
}

/* === RESPONSIVE DESIGN === */
@media screen and (max-width: 768px) {
    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100%;
        background-color: var(--bg-color-light);
        transition: right var(--transition-speed);
        padding: 4rem 2rem 2rem;
        box-shadow: -4px 0 8px rgba(0,0,0,0.1);
        z-index: 110;
        backdrop-filter: blur(10px);
        background-color: rgba(247, 249, 252, 0.9);
    }
    
    body.dark-mode .nav__menu {
        background-color: rgba(26, 26, 26, 0.9);
        box-shadow: -4px 0 8px rgba(0,0,0,0.2);
    }

    /* Class to show the menu */
    .show-menu {
        right: 0;
    }
    
    .nav__list {
        flex-direction: column;
        align-items: flex-start;
        gap: 2.5rem;
    }

    .nav__close {
        position: absolute;
        top: 1rem;
        right: 1.5rem;
        font-size: 1.5rem;
    }

    .nav__toggle {
        display: block; /* Shown on mobile */
    }
    
    .hero__title {
        font-size: 2rem;
    }

    .hero__role {
        font-size: 1.15rem;
    }

    .timeline::after {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 60px;
        padding-right: 15px;
    }

    .timeline-item:nth-child(odd), .timeline-item:nth-child(even) {
        left: 0;
    }

    .timeline-item::after {
        left: 10px;
    }
}