/* =========================================================================
   Sheldon Mendoza — Personal Corporate Site
   Design system: deep navy / royal blue / black / white, editorial type
   ========================================================================= */

:root {
  /* Palette */
  --navy-950: #05070d;
  --navy-900: #070b16;
  --navy-800: #0b1120;
  --navy-700: #10182c;
  --navy-600: #182238;
  --blue-600: #1f3fd6;
  --blue-500: #2f56ff;
  --blue-400: #5b7bff;
  --blue-glow: rgba(47, 86, 255, 0.35);
  --white: #f7f8fb;
  --white-dim: #c9cedb;
  --gray-400: #8992a8;
  --gray-500: #6b7488;
  --gray-700: #3a4256;
  --black: #000000;
  --border-soft: rgba(255, 255, 255, 0.09);
  --border-softer: rgba(255, 255, 255, 0.06);

  /* Type */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;

  /* Spacing scale */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;
  --space-7: 9rem;

  /* Layout */
  --container-max: 1180px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--navy-950);
  color: var(--white);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3, h4, p {
  margin: 0;
}

button {
  font-family: inherit;
}

::selection {
  background: var(--blue-500);
  color: var(--white);
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ---------- Accessibility ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--blue-500);
  color: var(--white);
  padding: 0.75rem 1.25rem;
  z-index: 1000;
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  left: var(--space-2);
  top: var(--space-2);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--blue-400);
  outline-offset: 3px;
  border-radius: 4px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.section {
  padding: var(--space-6) 0;
}

.section--tight {
  padding: var(--space-5) 0;
}

.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--blue-400);
  margin-bottom: var(--space-2);
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--white);
}

.eyebrow-divider {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.eyebrow-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border-soft);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.95rem 2rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.35s var(--ease), background 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), color 0.3s var(--ease);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
  color: var(--white);
  box-shadow: 0 8px 24px -8px var(--blue-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px -8px var(--blue-glow);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: var(--border-soft);
}

.btn-outline:hover {
  border-color: var(--blue-400);
  background: rgba(47, 86, 255, 0.08);
  transform: translateY(-2px);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--white);
  border-bottom: 1px solid var(--border-soft);
  padding-bottom: 2px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), gap 0.25s var(--ease);
}

.text-link:hover {
  color: var(--blue-400);
  border-color: var(--blue-400);
  gap: 0.65em;
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 500;
  background: rgba(5, 7, 13, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border-softer);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
}

.brand span {
  color: var(--blue-400);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-links {
  display: flex;
  gap: var(--space-3);
}

.nav-links a {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white-dim);
  position: relative;
  padding: 0.4rem 0;
  transition: color 0.25s var(--ease);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--blue-400);
  transition: width 0.3s var(--ease);
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--white);
}

.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after {
  width: 100%;
}

.nav-social {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-social a {
  color: var(--gray-400);
  transition: color 0.25s var(--ease);
}

.nav-social a:hover {
  color: var(--blue-400);
}

.nav-social svg {
  width: 16px;
  height: 16px;
  display: block;
}

/* Monogram social badges (used in header + footer) */
.icon-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--gray-400);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.icon-badge:hover {
  color: var(--white);
  border-color: var(--blue-400);
  background: rgba(47, 86, 255, 0.1);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.nav-toggle .bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  position: relative;
  transition: background 0.2s var(--ease);
}

.nav-toggle .bar::before,
.nav-toggle .bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: var(--white);
  transition: transform 0.3s var(--ease), top 0.3s var(--ease);
}

.nav-toggle .bar::before { top: -7px; }
.nav-toggle .bar::after { top: 7px; }

.nav-toggle[aria-expanded="true"] .bar {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .bar::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .bar::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-top: calc(76px + var(--space-6));
  padding-bottom: var(--space-6);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 80% 0%, rgba(47, 86, 255, 0.16), transparent 60%),
    radial-gradient(ellipse 50% 40% at 0% 100%, rgba(31, 63, 214, 0.12), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--space-6);
  align-items: center;
}

.hero-copy .section-label {
  margin-bottom: var(--space-3);
}

.hero-name {
  font-size: clamp(2.4rem, 5.2vw, 4.1rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.03;
  color: var(--white);
}

.hero-titles {
  margin-top: var(--space-2);
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  color: var(--blue-400);
  font-weight: 600;
  line-height: 1.5;
}

.hero-titles .divider-dot {
  color: var(--gray-500);
  margin: 0 0.5em;
}

.hero-disciplines {
  margin-top: 0.65rem;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--gray-400);
  line-height: 1.6;
}

.hero-disciplines .divider-dot {
  color: var(--gray-500);
  margin: 0 0.45em;
}

.hero-intro {
  margin-top: var(--space-3);
  max-width: 46ch;
  font-size: 1.05rem;
  color: var(--white-dim);
  line-height: 1.7;
}

.hero-actions {
  margin-top: var(--space-4);
}

.hero-portrait {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 2 / 3;
  background: var(--navy-800);
  box-shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.7);
}

.hero-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-portrait::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(5, 7, 13, 0.55) 100%);
  pointer-events: none;
}

/* ---------- Who I Am / generic split section ---------- */
.split-section .container {
  display: grid;
  grid-template-columns: 0.4fr 0.6fr;
  gap: var(--space-5);
}

.split-section .split-body p + p {
  margin-top: var(--space-2);
}

.split-body p {
  color: var(--white-dim);
  font-size: 1.05rem;
  line-height: 1.75;
  max-width: 62ch;
}

.split-section .cta-row {
  margin-top: var(--space-3);
}

/* ---------- What I Do (home teaser + full page) ---------- */
.discipline-grid {
  margin-top: var(--space-4);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.discipline {
  background: var(--navy-950);
  padding: var(--space-4);
  transition: background 0.3s var(--ease);
}

.discipline:hover {
  background: var(--navy-900);
}

.discipline-index {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--blue-400);
}

.discipline h3 {
  margin-top: var(--space-1);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}

.discipline p {
  margin-top: 0.6rem;
  color: var(--white-dim);
  font-size: 0.95rem;
  line-height: 1.65;
}

.section-cta {
  margin-top: var(--space-4);
}

/* ---------- Books ---------- */
.books-grid {
  margin-top: var(--space-4);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}

.book-card {
  display: flex;
  flex-direction: column;
}

.book-cover {
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 2 / 3;
  background: var(--navy-800);
  box-shadow: 0 18px 40px -18px rgba(0, 0, 0, 0.6);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.book-card:hover .book-cover {
  transform: translateY(-4px);
  box-shadow: 0 24px 50px -18px rgba(0, 0, 0, 0.7);
}

.book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-card h3 {
  margin-top: var(--space-2);
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.35;
}

.book-card p {
  margin-top: 0.4rem;
  font-size: 0.88rem;
  color: var(--white-dim);
  line-height: 1.6;
}

.book-card .text-link {
  margin-top: var(--space-2);
  font-size: 0.85rem;
}

.books-cta {
  margin-top: var(--space-5);
  text-align: center;
}

/* ---------- My Work directory ---------- */
.work-links {
  margin-top: var(--space-4);
  border-top: 1px solid var(--border-soft);
}

.work-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border-soft);
  transition: padding-left 0.3s var(--ease), color 0.3s var(--ease);
}

.work-link:hover {
  padding-left: var(--space-2);
  color: var(--blue-400);
}

.work-link .label {
  font-size: clamp(1.1rem, 2.4vw, 1.6rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.work-link .arrow {
  font-size: 1.4rem;
  transition: transform 0.3s var(--ease);
}

.work-link:hover .arrow {
  transform: translateX(6px);
}

.work-link .desc {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.9rem;
  color: var(--gray-400);
  font-weight: 400;
}

/* ---------- Contact ---------- */
.contact-section {
  text-align: center;
  position: relative;
}

.contact-section .container {
  max-width: 720px;
}

.contact-section p {
  margin: var(--space-2) auto 0;
  color: var(--white-dim);
  font-size: 1.05rem;
  max-width: 52ch;
}

.contact-section .hero-actions {
  justify-content: center;
  margin-top: var(--space-4);
}

.contact-email {
  margin-top: var(--space-3);
  font-size: 0.95rem;
  color: var(--gray-400);
}

.contact-email a {
  color: var(--white);
  border-bottom: 1px solid var(--border-soft);
}

.contact-email a:hover {
  color: var(--blue-400);
  border-color: var(--blue-400);
}

/* Dedicated contact page */
.contact-page .contact-methods {
  margin-top: var(--space-5);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  text-align: left;
}

.contact-method {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}

.contact-method h3 {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue-400);
}

.contact-method .value {
  display: block;
  margin-top: var(--space-1);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--white);
}

.contact-method .value:hover {
  color: var(--blue-400);
}

.social-grid {
  margin-top: var(--space-5);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
}

.social-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.65rem 1.1rem;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--white-dim);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.social-pill:hover {
  color: var(--white);
  border-color: var(--blue-400);
}

.social-pill svg {
  width: 15px;
  height: 15px;
}

/* ---------- Page hero (interior pages) ---------- */
.page-hero {
  padding-top: calc(76px + var(--space-5));
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-softer);
}

.page-hero .section-label {
  margin-bottom: var(--space-2);
}

.page-hero h1 {
  font-size: clamp(2.1rem, 4.4vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.page-hero .lede {
  margin-top: var(--space-3);
  max-width: 58ch;
  color: var(--white-dim);
  font-size: 1.1rem;
  line-height: 1.7;
}

/* ---------- About page ---------- */
.about-layout {
  display: grid;
  grid-template-columns: 0.36fr 0.64fr;
  gap: var(--space-6);
  align-items: start;
}

.about-portrait {
  position: sticky;
  top: calc(76px + var(--space-3));
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.7);
}

.about-portrait img {
  width: 100%;
  display: block;
}

.bio-block {
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--border-softer);
}

.bio-block:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.bio-block + .bio-block {
  margin-top: var(--space-5);
}

.bio-block h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}

.bio-block .kicker {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-400);
  margin-bottom: 0.5rem;
}

.bio-block p {
  margin-top: var(--space-2);
  color: var(--white-dim);
  font-size: 1.03rem;
  line-height: 1.8;
}

.bio-block p:first-of-type {
  margin-top: var(--space-3);
}

/* ---------- What I Do full page ---------- */
.services-list {
  margin-top: var(--space-5);
  display: grid;
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.service-row {
  background: var(--navy-950);
  padding: var(--space-4);
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: var(--space-3);
  align-items: baseline;
  transition: background 0.3s var(--ease);
}

.service-row:hover {
  background: var(--navy-900);
}

.service-num {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--blue-600);
  letter-spacing: -0.02em;
}

.service-row h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--white);
}

.service-row p {
  margin-top: 0.6rem;
  color: var(--white-dim);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 60ch;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border-softer);
  padding: var(--space-5) 0 var(--space-3);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
}

.footer-brand .brand {
  display: block;
}

.footer-brand .tagline {
  margin-top: var(--space-1);
  color: var(--gray-400);
  font-size: 0.9rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.footer-nav a {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white-dim);
  transition: color 0.25s var(--ease);
}

.footer-nav a:hover {
  color: var(--blue-400);
}

.footer-social {
  display: flex;
  gap: var(--space-2);
}

.footer-social a {
  color: var(--gray-400);
  transition: color 0.25s var(--ease);
}

.footer-social a:hover {
  color: var(--blue-400);
}

.footer-social svg {
  width: 16px;
  height: 16px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-softer);
  font-size: 0.8rem;
  color: var(--gray-500);
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

/* ---------- 404 ---------- */
.not-found {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-6) var(--space-3);
}

.not-found .code {
  font-size: 5rem;
  font-weight: 800;
  color: var(--blue-500);
  line-height: 1;
}

.not-found p {
  margin-top: var(--space-2);
  color: var(--white-dim);
}

.not-found .btn {
  margin-top: var(--space-4);
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .hero-portrait {
    max-width: 440px;
    margin: 0 auto;
    order: -1;
  }

  .split-section .container {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

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

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

  .about-layout {
    grid-template-columns: 1fr;
  }

  .about-portrait {
    position: static;
    max-width: 420px;
    margin: 0 auto;
  }

  .service-row {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }

  .contact-page .contact-methods {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .main-nav {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--navy-950);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: var(--space-4) var(--space-3);
    gap: var(--space-4);
    transform: translateX(100%);
    transition: transform 0.4s var(--ease);
    overflow-y: auto;
  }

  .main-nav.is-open {
    transform: translateX(0);
  }

  .nav-links {
    flex-direction: column;
    gap: var(--space-3);
    width: 100%;
  }

  .nav-links a {
    font-size: 1.1rem;
    display: block;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .books-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
  }

  .footer-top {
    flex-direction: column;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .books-grid {
    grid-template-columns: 1fr 1fr;
  }

  .section {
    padding: var(--space-5) 0;
  }
}