/* ============================================================
   JAUME FIGUERAS — Dark Premium Redesign
   Inspirado en Linear / Vercel. Atmósfera mate y profesional.
   ============================================================ */

/* --- Variables -------------------------------------------- */
:root {
  --bg-body:          #121214;
  --bg-surface:       #1c1c1e;
  --bg-surface-2:     #242426;
  --border:           #2c2c2e;
  --border-hover:     #38bdf8;
  --text-primary:     #f5f5f7;
  --text-secondary:   #86868b;
  --accent:           #38bdf8;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display',
          'Helvetica Neue', Arial, sans-serif;
  --radius:           12px;
  --radius-sm:        8px;
  --transition:       all 0.3s ease;
}

/* --- Reset & Base ----------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg-body);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}
a:hover { color: #7dd3fc; text-decoration: none; }

::selection { background: var(--accent); color: #000; }

/* --- Scrollbar (sutil) ------------------------------------ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-body); }
::-webkit-scrollbar-thumb { background: #3a3a3c; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ============================================================
   NAVBAR
   ============================================================ */
.jf-navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 64px;
  display: flex;
  align-items: center;
  padding: 0 2rem;
  background: rgba(18, 18, 20, 0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.jf-navbar__logo {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--text-primary);
  text-transform: uppercase;
  white-space: nowrap;
  margin-right: auto;
  text-decoration: none;
}
.jf-navbar__logo:hover { color: var(--accent); }

.jf-navbar__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.jf-navbar__links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.jf-navbar__links a:hover {
  color: var(--text-primary);
  background: var(--bg-surface);
}

/* Hamburger */
.jf-navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
  background: none;
  border: none;
}
.jf-navbar__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: var(--transition);
}

/* Mobile nav */
.jf-navbar__mobile {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: rgba(18, 18, 20, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 1rem 2rem;
  z-index: 999;
}
.jf-navbar__mobile.open { display: block; }
.jf-navbar__mobile a {
  display: block;
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.jf-navbar__mobile a:last-child { border-bottom: none; }
.jf-navbar__mobile a:hover { color: var(--text-primary); }

@media (max-width: 767px) {
  .jf-navbar__links { display: none; }
  .jf-navbar__toggle { display: flex; }
}

/* ============================================================
   HERO
   ============================================================ */
.jf-hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 4rem;
  padding: 8rem 4rem 6rem;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

/* Subtle dot grid background for entire body top area */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(56, 189, 248, 0.06) 1px, transparent 1px);
  background-size: 36px 36px;
  pointer-events: none;
  z-index: 0;
}

.jf-hero__content {
  position: relative;
  z-index: 1;
}

.jf-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}
.jf-hero__eyebrow::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.jf-hero__name {
  font-size: clamp(2.4rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 1.75rem;
}

.jf-hero__bio {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-secondary);
  max-width: 520px;
}

.jf-hero__bio strong {
  color: var(--text-primary);
  font-weight: 500;
}

.jf-hero__cta {
  display: flex;
  gap: 0.75rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

.jf-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
}
.jf-btn--primary {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}
.jf-btn--primary:hover {
  background: #7dd3fc;
  border-color: #7dd3fc;
  color: #000;
}
.jf-btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.jf-btn--ghost:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

/* --- Foto hero -------------------------------------------- */
.jf-hero__photo-wrap {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.jf-hero__photo-inner {
  position: relative;
  width: 100%;
  max-width: 420px;
}

/* Decoration ring */
.jf-hero__photo-inner::before {
  content: '';
  position: absolute;
  inset: -12px;
  border: 1px solid rgba(56, 189, 248, 0.18);
  border-radius: calc(var(--radius) + 12px);
  pointer-events: none;
}
.jf-hero__photo-inner::after {
  content: '';
  position: absolute;
  inset: -24px;
  border: 1px solid rgba(56, 189, 248, 0.07);
  border-radius: calc(var(--radius) + 24px);
  pointer-events: none;
}

.jf-hero__photo {
  width: 100%;
  border-radius: var(--radius);
  display: block;
  filter: grayscale(15%) contrast(1.04);
  box-shadow:
    0 0 0 1px var(--border),
    0 32px 80px rgba(0,0,0,0.6),
    0 0 60px rgba(56,189,248,0.06);
}

/* Gradient overlay at bottom of photo */
.jf-hero__photo-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 45%;
  background: linear-gradient(to top, var(--bg-body) 0%, transparent 100%);
  border-radius: 0 0 var(--radius) var(--radius);
  pointer-events: none;
}

/* Glow spot */
.jf-hero__glow {
  position: absolute;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: -1;
}

@media (max-width: 991px) {
  .jf-hero {
    grid-template-columns: 1fr;
    gap: 3rem;
    padding: 7rem 2rem 4rem;
    text-align: center;
  }
  .jf-hero__content { order: 2; }
  .jf-hero__photo-wrap { order: 1; }
  .jf-hero__bio { margin: 0 auto; }
  .jf-hero__eyebrow { justify-content: center; }
  .jf-hero__cta { justify-content: center; }
  .jf-hero__photo-inner { max-width: 280px; }
}

/* ============================================================
   BENTO GRID — 4 PATAS
   ============================================================ */
.jf-bento {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 4rem 6rem;
  position: relative;
  z-index: 1;
}

.jf-bento__header {
  margin-bottom: 2rem;
}

.jf-bento__label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}
.jf-bento__label::before {
  content: '';
  display: inline-block;
  width: 16px;
  height: 1px;
  background: var(--border-hover);
}

.jf-bento__title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.jf-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.jf-card {
  background: var(--bg-surface);
  padding: 2rem 2rem 2.25rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  cursor: default;
}

.jf-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(56,189,248,0.04), transparent 60%);
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
}

.jf-card:hover {
  background: var(--bg-surface-2);
}
.jf-card:hover::before { opacity: 1; }

/* Top accent line on hover */
.jf-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}
.jf-card:hover::after { transform: scaleX(1); }

.jf-card__icon {
  font-size: 1.75rem;
  margin-bottom: 1rem;
  display: block;
  line-height: 1;
}

.jf-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.jf-card__text {
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

.jf-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 1.25rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(4px);
  transition: var(--transition);
}
.jf-card:hover .jf-card__link {
  opacity: 1;
  transform: translateY(0);
}
.jf-card__link::after { content: '→'; }

@media (max-width: 767px) {
  .jf-bento { padding: 0 1.5rem 4rem; }
  .jf-grid { grid-template-columns: 1fr; }
  .jf-card { padding: 1.5rem; }
}

/* ============================================================
   LIBROS SECTION
   ============================================================ */
.jf-books {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 5rem 0;
  position: relative;
  z-index: 1;
}

.jf-books .container { max-width: 1200px; margin: 0 auto; padding: 0 4rem; }

.jf-section-header {
  text-align: center;
  margin-bottom: 3rem;
}
.jf-section-header h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

/* Filtros de libros */
.filters { text-align: center; margin-bottom: 2.5rem; }
.filters ul { list-style: none; display: inline-flex; gap: 0.5rem; flex-wrap: wrap; justify-content: center; }
.filters ul li {
  padding: 0.4rem 1rem;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: var(--transition);
  background: transparent;
}
.filters ul li:hover,
.filters ul li.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(56,189,248,0.06);
}

/* Tarjetas de libros */
.single-portfolio {
  margin-bottom: 2rem;
}
.single-portfolio .thumb {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-sm);
}
.single-portfolio img {
  width: 100% !important;
  height: auto !important;
  border-radius: var(--radius-sm);
  display: block;
  transition: transform 0.4s ease;
}
.single-portfolio .thumb:hover img { transform: scale(1.03); }
.single-portfolio .overlay-bg {
  position: absolute;
  inset: 0;
  background: rgba(56, 189, 248, 0.12);
  opacity: 0;
  transition: var(--transition);
  border-radius: var(--radius-sm);
  z-index: 1;
}
.single-portfolio .thumb:hover .overlay-bg { opacity: 1; }

/* Botones de libros */
.btn-comprar,
.btn-descargar {
  display: inline-block;
  padding: 0.5rem 1.4rem;
  border-radius: 100px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: var(--transition);
  text-align: center;
  font-size: 0.75rem;
  font-family: var(--font);
}
.btn-comprar {
  color: var(--accent);
  border: 1px solid var(--accent);
  background: transparent;
}
.btn-comprar:hover {
  background: var(--accent);
  color: #000;
}
.btn-descargar {
  color: var(--text-secondary);
  border: 1px solid var(--border);
  background: transparent;
}
.btn-descargar:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

@media (max-width: 767px) {
  .jf-books .container { padding: 0 1.5rem; }
}

/* ============================================================
   SOBRE MÍ
   ============================================================ */
.jf-about {
  max-width: 1200px;
  margin: 0 auto;
  padding: 5rem 4rem;
  position: relative;
  z-index: 1;
}

.jf-about__inner {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 4rem;
  align-items: center;
}

.jf-about__img {
  width: 100%;
  border-radius: var(--radius);
  display: block;
  filter: grayscale(10%);
  box-shadow: 0 0 0 1px var(--border), 0 24px 60px rgba(0,0,0,0.5);
}

.jf-about__label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.jf-about__label::before {
  content: '';
  display: inline-block;
  width: 16px;
  height: 1px;
  background: var(--accent);
}

.jf-about__title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

.jf-about__text {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-secondary);
}
.jf-about__text p { margin-bottom: 1rem; }

@media (max-width: 991px) {
  .jf-about { padding: 4rem 1.5rem; }
  .jf-about__inner { grid-template-columns: 1fr; gap: 2rem; }
}

/* ============================================================
   FOOTER
   ============================================================ */
.jf-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  position: relative;
  z-index: 1;
}

.jf-footer__copy {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.jf-footer__social {
  display: flex;
  gap: 1rem;
}
.jf-footer__social a {
  color: var(--text-secondary);
  font-size: 1.2rem;
  transition: var(--transition);
  line-height: 1;
}
.jf-footer__social a:hover { color: var(--accent); }

@media (max-width: 767px) {
  .jf-footer { padding: 2rem 1.5rem; justify-content: center; text-align: center; }
}

/* ============================================================
   BACK TO TOP
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 40px;
  height: 40px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  z-index: 999;
  transition: var(--transition);
  text-decoration: none;
}
.back-to-top:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(56,189,248,0.08);
}

/* ============================================================
   MODALS (Bootstrap 4 override)
   ============================================================ */
.modal-content {
  background: var(--bg-surface) !important;
  border: 1px solid var(--border) !important;
  border-radius: var(--radius) !important;
  color: var(--text-primary) !important;
  box-shadow: 0 24px 80px rgba(0,0,0,0.7) !important;
}
.modal-header { border-bottom: 1px solid var(--border) !important; }
.modal-footer { border-top: 1px solid var(--border) !important; }
.modal-title { font-size: 1rem; font-weight: 700; color: var(--text-primary); }
.modal-body { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.8; }
.close { color: var(--text-secondary) !important; opacity: 1 !important; }
.close:hover { color: var(--text-primary) !important; }
.btn-outline-light {
  color: var(--text-secondary) !important;
  border-color: var(--border) !important;
}
.btn-outline-light:hover {
  background: var(--bg-surface-2) !important;
  border-color: var(--text-secondary) !important;
  color: var(--text-primary) !important;
}