/* ==========================================================================
   Cristián Torres Castro — Personal Landing Page Stylesheet
   Based on Design.md reference & Enhanced with Modern Clean Aesthetic
   ========================================================================== */

@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap");

/* --- ROOT VARIABLES & COLOR SYSTEM --- */
:root {
  /* Light Theme (Default / Reference Match) */
  --bg-main: #ffffff;
  --bg-secondary: #fafafa;
  --bg-card: #ffffff;
  --bg-card-alt: #f8f9fa;
  --bg-badge: #f1f3f5;
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-muted: #6b7280;
  --border-color: #e5e7eb;
  --border-strong: #374151;
  --border-card: rgb(163, 163, 163);
  --btn-primary-bg: rgb(53, 53, 53);
  --btn-primary-text: #ffffff;
  --btn-primary-hover-bg: #000000;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08);
  --accent-color: #0f172a;
  --status-green: #10b981;
  --transition-speed: 300ms;
}

[data-theme="dark"] {
  /* Dark Theme Support */
  --bg-main: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: #161e2e;
  --bg-card-alt: #1f293d;
  --bg-badge: #232f48;
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-muted: #9ca3af;
  --border-color: #374151;
  --border-strong: #6b7280;
  --border-card: #374151;
  --btn-primary-bg: #f9fafb;
  --btn-primary-text: #0b0f19;
  --btn-primary-hover-bg: #e5e7eb;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
  --accent-color: #38bdf8;
  --status-green: #34d399;
}

/* --- RESET & BASE --- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: "Poppins", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

p {
  color: var(--text-secondary);
}

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

a:hover {
  color: var(--text-muted);
}

button {
  font-family: inherit;
  cursor: pointer;
}

/* --- NAVIGATION BAR --- */
#header {
  position: sticky;
  top: 0;
  background: var(--bg-main);
  backdrop-filter: blur(8px);
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-speed) ease;
}

#desktop-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.25rem 2rem;
  height: 80px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-badge {
  font-size: 0.75rem;
  background: var(--bg-badge);
  color: var(--text-secondary);
  padding: 0.15rem 0.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  font-size: 1.05rem;
  font-weight: 500;
}

.nav-links a {
  position: relative;
  padding: 0.25rem 0;
}

.nav-links a:hover {
  color: var(--text-primary);
  text-decoration: underline;
  text-underline-offset: 0.75rem;
  text-decoration-color: var(--border-card);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-speed) ease;
}

.theme-btn:hover {
  background: var(--bg-badge);
}

[data-theme="dark"] .sun-icon {
  display: block;
}
[data-theme="dark"] .moon-icon {
  display: none;
}
:root:not([data-theme="dark"]) .sun-icon {
  display: none;
}
:root:not([data-theme="dark"]) .moon-icon {
  display: block;
}

.btn-nav {
  padding: 0.5rem 1.25rem !important;
  font-size: 0.9rem !important;
  background: var(--btn-primary-bg) !important;
  color: var(--btn-primary-text) !important;
  border-radius: 2rem !important;
  font-weight: 600;
}

.btn-nav:hover {
  background: var(--btn-primary-hover-bg) !important;
  color: #fff !important;
}

/* HAMBURGER MENU (MOBILE) */
#hamburger-nav {
  display: none;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  height: 70px;
}

.hamburger-menu {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.hamburger-icon {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 22px;
  width: 28px;
  cursor: pointer;
  z-index: 1001;
}

.hamburger-icon span {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  transition: all 0.3s ease-in-out;
  border-radius: 2px;
}

.menu-links {
  position: absolute;
  top: 50px;
  right: 0;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  border-radius: 1rem;
  width: 220px;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s ease-in-out;
  list-style: none;
  z-index: 1000;
}

.menu-links.open {
  max-height: 380px;
  padding: 1rem 0;
}

.menu-links a {
  display: block;
  padding: 0.75rem 1.5rem;
  font-size: 1.1rem;
  color: var(--text-primary);
  font-weight: 500;
  transition: all 0.2s ease-in-out;
}

.menu-links a:hover {
  background-color: var(--bg-badge);
}

.hamburger-icon.open span:first-child {
  transform: rotate(45deg) translate(7px, 6px);
}
.hamburger-icon.open span:nth-child(2) {
  opacity: 0;
}
.hamburger-icon.open span:last-child {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* --- MAIN SECTIONS LAYOUT --- */
section {
  padding: 5rem 2rem;
  max-width: 1150px;
  margin: 0 auto;
  box-sizing: border-box;
}

.title {
  font-size: 2.75rem;
  text-align: center;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2rem;
  letter-spacing: -0.5px;
}

.section__text__p1 {
  text-align: center;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 0.25rem;
}

.section-subtitle-center {
  text-align: center;
  max-width: 680px;
  margin: -1rem auto 2.5rem auto;
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* --- HERO / PROFILE SECTION --- */
#profile {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4.5rem;
  min-height: 75vh;
  padding-top: 3rem;
  padding-bottom: 4rem;
}

.section__pic-container {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-shrink: 0;
}

.profile-avatar-wrapper {
  position: relative;
}

.avatar-card {
  width: 320px;
  height: 320px;
  background: linear-gradient(145deg, var(--bg-card), var(--bg-secondary));
  border: 2px solid var(--border-color);
  border-radius: 2.5rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  padding: 2rem;
  text-align: center;
  transition: transform 0.3s ease;
}

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

.avatar-initials {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  background: var(--text-primary);
  color: var(--bg-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: 2px;
  box-shadow: var(--shadow-md);
}

.avatar-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-badge);
  padding: 0.4rem 0.9rem;
  border-radius: 2rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--status-green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--status-green);
}

.experience-badge-floating {
  position: absolute;
  bottom: -15px;
  right: -15px;
  background: var(--bg-main);
  border: 1.5px solid var(--border-color);
  box-shadow: var(--shadow-md);
  padding: 0.75rem 1.25rem;
  border-radius: 1.25rem;
  text-align: center;
  display: flex;
  flex-direction: column;
}

.badge-number {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.badge-text {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
}

.section__text {
  max-width: 540px;
}

.section__text .title {
  text-align: left;
  font-size: 2.75rem;
  margin-bottom: 0.5rem;
  line-height: 1.15;
}

.section__text__p1 {
  text-align: left;
}

.section__text__p2 {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.section__text__tagline {
  font-size: 1.05rem;
  margin-bottom: 1.75rem;
  line-height: 1.6;
}

.section__text__tagline strong {
  color: var(--text-primary);
}

/* BUTTONS */
.btn-container {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.btn {
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition-speed) ease;
  padding: 0.9rem 1.75rem;
  border-radius: 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.btn-color-1 {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  border: 1.5px solid var(--btn-primary-bg);
}

.btn-color-1:hover {
  background: var(--btn-primary-hover-bg);
  border-color: var(--btn-primary-hover-bg);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-color-2 {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border-strong);
}

.btn-color-2:hover {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-large {
  padding: 1.1rem 2.5rem;
  font-size: 1.1rem;
}

/* SOCIALS */
#socials-container {
  display: flex;
  gap: 1.25rem;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--bg-badge);
  border: 1px solid var(--border-color);
  border-radius: 2rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-speed) ease;
}

.social-link:hover {
  background: var(--text-primary);
  color: var(--bg-main);
  transform: translateY(-2px);
}

.social-link .icon {
  width: 18px;
  height: 18px;
}

/* --- STATS SECTION --- */
.stats-section {
  padding: 2.5rem 2rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1.5rem;
  padding: 1.75rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-title {
  display: block;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.stat-desc {
  font-size: 0.82rem;
  line-height: 1.4;
}

/* --- ABOUT SECTION --- */
.about-containers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.details-container {
  padding: 2rem 1.5rem;
  background: var(--bg-card);
  border-radius: 1.75rem;
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: all 0.3s ease;
}

.details-container:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.card-icon-wrapper {
  width: 56px;
  height: 56px;
  margin: 0 auto 1.25rem;
  background: var(--bg-badge);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
}

.details-container h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.details-container p {
  font-size: 0.95rem;
  line-height: 1.5;
}

.text-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2.25rem;
  border-radius: 1.75rem;
  box-shadow: var(--shadow-sm);
}

.text-container p {
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
}

.quote-box {
  background: var(--bg-secondary);
  border-left: 4px solid var(--text-primary);
  padding: 1.25rem 1.5rem;
  border-radius: 0 1rem 1rem 0;
  margin-top: 1rem;
  font-size: 1rem;
  color: var(--text-primary);
}

/* ARROW NAVIGATION */
.arrow-container {
  display: flex;
  justify-content: center;
  margin-top: 3rem;
}

.arrow {
  cursor: pointer;
  color: var(--text-muted);
  animation: bounce 2s infinite;
  transition: color 0.2s ease;
}

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

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-8px); }
  60% { transform: translateY(-4px); }
}

/* --- EXPERIENCE (TIMELINE) --- */
.timeline-container {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  margin-top: 1rem;
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 1.75rem;
  padding: 2.25rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.timeline-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  background: var(--bg-badge);
  color: var(--text-secondary);
  padding: 0.3rem 0.75rem;
  border-radius: 1rem;
  display: inline-block;
  margin-bottom: 0.5rem;
}

.timeline-tag.current {
  background: #dcfce7;
  color: #15803d;
}

[data-theme="dark"] .timeline-tag.current {
  background: #064e3b;
  color: #6ee7b7;
}

.timeline-role {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.timeline-company {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-muted);
}

.timeline-date {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-badge);
  padding: 0.4rem 1rem;
  border-radius: 2rem;
}

.timeline-body ul {
  padding-left: 1.5rem;
  color: var(--text-secondary);
}

.timeline-body li {
  margin-bottom: 0.65rem;
  font-size: 1rem;
}

.timeline-body strong {
  color: var(--text-primary);
}

/* --- SKILLS SECTION --- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.experience-sub-title {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.4rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.article-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  text-align: left;
}

article {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.icon-check {
  color: var(--text-primary);
  flex-shrink: 0;
  margin-top: 0.2rem;
}

article h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
}

article p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- PROJECTS SECTION --- */
.projects-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 2rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 2.25rem 1.75rem;
  background: var(--bg-card);
  text-align: left;
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.project-badge {
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-badge);
  color: var(--text-secondary);
  padding: 0.35rem 0.8rem;
  border-radius: 1rem;
}

.project-icon-badge {
  color: var(--text-primary);
}

.project-title {
  text-align: left;
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.project-description {
  font-size: 0.95rem;
  line-height: 1.55;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
}

.project-tags span {
  font-size: 0.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.25rem 0.6rem;
  border-radius: 0.5rem;
  font-weight: 500;
}

.project-btn {
  width: 100%;
}

/* --- CLIENTS SECTION --- */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1.5rem;
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.client-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.client-card.highlight-client {
  border: 2px solid var(--border-strong);
  background: linear-gradient(145deg, var(--bg-card), var(--bg-secondary));
}

.client-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.client-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.client-card p {
  font-size: 0.9rem;
  line-height: 1.45;
}

/* --- CONTACT SECTION --- */
#contact {
  text-align: center;
}

.contact-info-upper-container {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin: 2.5rem auto;
  max-width: 900px;
}

.contact-info-container {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 1.5rem;
  padding: 1.25rem 1.75rem;
  flex: 1;
  min-width: 250px;
  text-align: left;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.contact-info-container:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}

.contact-icon-circle {
  width: 48px;
  height: 48px;
  background: var(--bg-badge);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  flex-shrink: 0;
}

.contact-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.contact-value {
  display: block;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.direct-cta-wrapper {
  margin-top: 2rem;
}

/* --- FOOTER --- */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 4rem 2rem 2rem;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1150px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-color);
}

.footer-brand h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.footer-brand p {
  font-size: 0.9rem;
}

.footer-nav .nav-links {
  font-size: 0.95rem;
  gap: 1.5rem;
}

.footer-bottom {
  max-width: 1150px;
  margin: 2rem auto 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- ANIMATIONS (FADE IN) --- */
.fade-in-section {
  opacity: 0;
  transform: translateY(20px);
  visibility: hidden;
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
  will-change: opacity, visibility;
}

.fade-in-section.is-visible {
  opacity: 1;
  transform: none;
  visibility: visible;
}