/* ============================================
   GABRIEL CRESPO — Personal Website
   styles.css
   ============================================ */

/* === DESIGN TOKENS === */
:root {
  /* Colors */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F5F5F0;
  --bg-dark: #111111;
  --text-primary: #1A1A1A;
  --text-secondary: #6B6B6B;
  --text-light: #999999;
  --text-on-dark: #F5F5F0;
  --accent: #2563EB;
  --accent-hover: #1D4ED8;
  --border: #E5E5E0;
  --card-bg: #FFFFFF;
  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.06);
  --card-shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.06), 0 12px 32px rgba(0, 0, 0, 0.1);

  /* Typography */
  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing */
  --section-pad: clamp(80px, 10vw, 120px);
  --container-max: 1200px;
  --gap: 32px;

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration: 0.3s;

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 100px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button {
  font: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

/* === ACCESSIBILITY === */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  padding: 12px 24px;
  background: var(--accent);
  color: white;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 1000;
  transition: top var(--duration) var(--ease);
}

.skip-link:focus {
  top: 16px;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 4px;
}

/* === LAYOUT === */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-pad) 0;
}

.section--alt {
  background-color: var(--bg-secondary);
}

.section__header {
  margin-bottom: 56px;
}

.section__tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 16px;
}

.section__tag--light {
  color: var(--accent);
}

.section__title {
  font-family: var(--font-sans);
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-primary);
}

.serif-italic {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--duration) var(--ease);
  white-space: nowrap;
}

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

.btn--primary:hover {
  background-color: #333;
  transform: translateY(-1px);
}

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

.btn--outline:hover {
  border-color: var(--text-primary);
  transform: translateY(-1px);
}

.btn__arrow {
  transition: transform var(--duration) var(--ease);
}

.btn:hover .btn__arrow {
  transform: translateX(3px);
}

/* === TAGS === */
.tag {
  display: inline-block;
  padding: 5px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-full);
}

/* === NAVIGATION === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: all var(--duration) var(--ease);
}

.navbar--scrolled {
  padding: 12px 0;
  box-shadow: 0 1px 0 var(--border);
}

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

.navbar__logo {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.navbar__link {
  padding: 8px 20px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  transition: all var(--duration) var(--ease);
}

.navbar__link:hover,
.navbar__link--active {
  color: var(--text-primary);
  background-color: var(--bg-secondary);
}

.navbar__link--cta {
  background-color: var(--text-primary);
  color: var(--bg-primary) !important;
  font-weight: 600;
}

.navbar__link--cta:hover {
  background-color: #333;
}

/* Hamburger */
.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.navbar__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: all var(--duration) var(--ease);
}

.navbar__toggle--active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar__toggle--active span:nth-child(2) {
  opacity: 0;
}

.navbar__toggle--active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* === HERO === */
.hero {
  padding-top: 140px;
  padding-bottom: 0;
  overflow: hidden;
}

.hero__content {
  max-width: 100%;
}

.hero__label {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 24px;
}

.hero__title {
  font-family: var(--font-sans);
  font-size: clamp(40px, 7vw, 70px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.hero__title-serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
}

.hero__subtitle {
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 40px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__stats {
  display: flex;
  gap: 48px;
  padding: 48px 0;
  border-top: 1px solid var(--border);
  margin-top: 24px;
}

.hero__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hero__stat-number {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
}

.hero__stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 64px;
}

.hero__image img {
  width: 100%;
  aspect-ratio: 4 / 5;
  max-height: 560px;
  object-fit: cover;
  border-radius: 20px;
}

/* Marquee */
.marquee {
  margin-top: 48px;
  padding: 20px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.marquee__track {
  display: flex;
  gap: 48px;
  animation: marquee 30s linear infinite;
  width: max-content;
}

.marquee__track span {
  font-size: 14px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-light);
  white-space: nowrap;
  position: relative;
}

.marquee__track span::after {
  content: '·';
  margin-left: 48px;
  color: var(--border);
}

@keyframes marquee {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

/* === ABOUT === */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-areas:
    "image heading"
    "image body";
  gap: 32px 64px;
  margin-bottom: 80px;
}

.about__heading { grid-area: heading; }
.about__image   { grid-area: image; }
.about__body    { grid-area: body; }

.about__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  border-radius: 20px;
}

.about__title {
  font-family: var(--font-sans);
  font-size: clamp(40px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.about__body p {
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.about__body p:last-child {
  margin-bottom: 0;
}

.skills__heading {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-light);
  margin-bottom: 32px;
}

.skills__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.skill-card {
  padding: 32px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--duration) var(--ease);
}

.skill-card:hover {
  box-shadow: var(--card-shadow);
  transform: translateY(-2px);
}

.skill-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-secondary);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  margin-bottom: 20px;
}

.skill-card__title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.skill-card__desc {
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-secondary);
}

/* === PROJECTS === */
.project-featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 48px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 32px;
}

.project-featured__tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 16px;
}

.project-featured__title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.project-featured__desc {
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.6;
}

.project-featured__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

/* Mockup visual */
.project-featured__mockup {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
}

.mockup__bar {
  display: flex;
  gap: 6px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.mockup__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border);
}

.mockup__content {
  padding: 24px;
}

.mockup__line {
  height: 10px;
  background: var(--border);
  border-radius: 4px;
  margin-bottom: 16px;
}

.mockup__line--title {
  width: 60%;
  height: 14px;
  margin-bottom: 24px;
}

.mockup__line--short {
  width: 40%;
}

.mockup__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.mockup__block {
  height: 60px;
  background: var(--border);
  border-radius: 6px;
}

.mockup__block--accent {
  background: var(--accent);
  opacity: 0.3;
}

/* Project cards */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-card {
  padding: 32px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--duration) var(--ease);
  display: flex;
  flex-direction: column;
}

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

.project-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  color: var(--text-secondary);
}

.project-card__link {
  color: var(--text-light);
  transition: color var(--duration) var(--ease);
}

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

.project-card__link--disabled {
  opacity: 0.3;
  pointer-events: none;
}

.project-card__title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.project-card__desc {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 24px;
  flex: 1;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* === BLOG === */
.blog__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.blog-card {
  padding: 40px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--duration) var(--ease);
  display: flex;
  flex-direction: column;
}

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

.blog-card__meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.blog-card__pub {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.blog-card__date {
  font-size: 13px;
  color: var(--text-light);
}

.blog-card__title {
  font-size: clamp(22px, 2.5vw, 28px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}

.blog-card__excerpt {
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 24px;
  flex: 1;
}

.blog-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  transition: gap var(--duration) var(--ease);
}

.blog-card__link:hover {
  gap: 10px;
}

/* === FOOTER === */
.footer {
  background-color: var(--bg-dark);
  color: var(--text-on-dark);
  padding: var(--section-pad) 0 48px;
}

.footer__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-bottom: 80px;
}

.footer__title {
  font-family: var(--font-sans);
  font-size: clamp(40px, 5vw, 60px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.footer__subtitle {
  font-size: 18px;
  color: #999;
  max-width: 400px;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 20px;
  justify-content: center;
}

.footer__link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 17px;
  color: #999;
  transition: color var(--duration) var(--ease);
}

.footer__link:hover {
  color: var(--text-on-dark);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__location,
.footer__copy {
  font-size: 14px;
  color: #666;
}

/* === SCROLL ANIMATIONS === */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.reveal-stagger--visible > *:nth-child(1) { transition-delay: 0s; }
.reveal-stagger--visible > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-stagger--visible > *:nth-child(3) { transition-delay: 0.2s; }
.reveal-stagger--visible > *:nth-child(4) { transition-delay: 0.3s; }
.reveal-stagger--visible > *:nth-child(5) { transition-delay: 0.4s; }
.reveal-stagger--visible > *:nth-child(6) { transition-delay: 0.5s; }

.reveal-stagger--visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* === RESPONSIVE === */

/* Tablet */
@media (max-width: 1024px) {

.about__grid {
  grid-template-columns: 1fr;
  grid-template-areas:
    "heading"
    "image"
    "body";
}

  .about__title {
    position: static;
  }

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

  .project-featured {
    grid-template-columns: 1fr;
    padding: 32px;
  }

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

  .footer__content {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

/* Mobile */
@media (max-width: 768px) {
  body {
    font-size: 16px;
  }

  .container {
    padding: 0 20px;
  }

  /* Nav */
  .navbar__nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background-color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: right var(--duration) var(--ease);
    z-index: 99;
  }

  .navbar__nav--open {
    right: 0;
  }

  .navbar__links {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .navbar__link {
    font-size: 24px;
    padding: 12px 32px;
  }

  .navbar__toggle {
    display: flex;
    z-index: 101;
  }

  /* Hero */
  .hero {
    padding-top: 120px;
  }

  .hero__stats {
    flex-direction: column;
    gap: 24px;
  }

  .hero__stat {
    flex-direction: row;
    align-items: baseline;
    gap: 12px;
  }

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

  .hero__image {
  display: none;
  }

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

  /* Projects */
  .project-featured {
    padding: 24px;
  }

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

  /* Blog */
  .blog__grid {
    grid-template-columns: 1fr;
  }

  /* Footer */
  .footer__bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

/* === REDUCED MOTION === */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

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

  .reveal-stagger > * {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .marquee__track {
    animation: none;
  }

  .btn:hover {
    transform: none;
  }

  .skill-card:hover,
  .project-card:hover,
  .blog-card:hover {
    transform: none;
  }
}