/* ============================================
   Portfolio — Luis Felipe Lozano
   Theme system + tech aesthetic
   ============================================ */

:root {
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --header-h: 72px;
}

/* Dark theme (default) */
[data-theme="dark"] {
  --bg: #0a0e17;
  --bg-elevated: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(22, 32, 52, 0.85);
  --border: rgba(99, 179, 237, 0.12);
  --border-strong: rgba(99, 179, 237, 0.25);
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent: #38bdf8;
  --accent-2: #818cf8;
  --accent-glow: rgba(56, 189, 248, 0.35);
  --gradient: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
  --grid-color: rgba(56, 189, 248, 0.04);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --terminal-bg: #0d1117;
  --success: #34d399;
  --header-bg: rgba(10, 14, 23, 0.85);
}

/* Light theme */
[data-theme="light"] {
  --bg: #f0f4f8;
  --bg-elevated: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --border: rgba(15, 23, 42, 0.08);
  --border-strong: rgba(15, 23, 42, 0.15);
  --text: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;
  --accent: #0284c7;
  --accent-2: #4f46e5;
  --accent-glow: rgba(2, 132, 199, 0.2);
  --gradient: linear-gradient(135deg, #0284c7 0%, #4f46e5 50%, #7c3aed 100%);
  --grid-color: rgba(2, 132, 199, 0.06);
  --shadow: 0 8px 32px rgba(15, 23, 42, 0.08);
  --terminal-bg: #1e293b;
  --success: #059669;
  --header-bg: rgba(240, 244, 248, 0.9);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

.container {
  width: min(1120px, 92vw);
  margin-inline: auto;
}

/* Background effects */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
  transition: opacity var(--transition);
}

.bg-glow--1 {
  width: 500px;
  height: 500px;
  background: var(--accent);
  top: -200px;
  right: -100px;
  opacity: 0.15;
}

.bg-glow--2 {
  width: 400px;
  height: 400px;
  background: var(--accent-2);
  bottom: 10%;
  left: -150px;
  opacity: 0.12;
}

[data-theme="light"] .bg-glow--1,
[data-theme="light"] .bg-glow--2 {
  opacity: 0.08;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  transition: background var(--transition), border-color var(--transition);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav__logo {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav__logo-bracket {
  color: var(--accent);
}

.nav__links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav__links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}

.nav__links a:hover {
  color: var(--accent);
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav__links a:hover::after {
  width: 100%;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  transition: all var(--transition);
}

.theme-toggle:hover {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}

.theme-toggle .icon {
  width: 20px;
  height: 20px;
}

[data-theme="dark"] .icon--sun { display: block; }
[data-theme="dark"] .icon--moon { display: none; }
[data-theme="light"] .icon--sun { display: none; }
[data-theme="light"] .icon--moon { display: block; }

.nav__menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  cursor: pointer;
  padding: 10px;
}

.nav__menu-btn span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition);
}

.nav__menu-btn[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__menu-btn[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav__menu-btn[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  min-height: 100vh;
  padding-top: var(--header-h);
  padding-bottom: 4rem;
}

.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-card);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero__title {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__role {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.hero__desc {
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 2rem;
  font-size: 1.05rem;
}

.hero__desc--tagline {
  font-size: 0.95rem;
  line-height: 1.85;
}

.hero__chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.15rem 0.45rem;
  margin: 0 0.15rem;
  border-radius: 4px;
  border: 1px solid var(--border-strong);
  color: var(--accent);
  background: rgba(56, 189, 248, 0.08);
  vertical-align: middle;
}

.hero__cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn--primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
}

.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Terminal */
.hero__terminal {
  width: 100%;
  min-width: 0;
}

.terminal {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow), 0 0 60px var(--accent-glow);
  background: var(--terminal-bg);
  width: 100%;
}

.terminal__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0.5rem 0.75rem;
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid var(--border);
}

.terminal__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.terminal__dot--red { background: #ff5f57; }
.terminal__dot--yellow { background: #febc2e; }
.terminal__dot--green { background: #28c840; }

.terminal__title {
  margin-left: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.terminal__body {
  padding: 0.65rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.55;
  overflow-x: auto;
}

.terminal__body code {
  color: #c9d1d9;
}

.t-prompt { color: var(--accent); }
.t-out { color: #8b949e; }

.t-json {
  display: block;
  margin-top: 0.15rem;
  color: #8b949e;
  white-space: pre-wrap;
}

.t-passion {
  color: #a5d6ff;
  display: block;
  margin-top: 0.15rem;
  min-height: 1.4em;
  transition: opacity 0.3s ease;
}

.t-passion.is-fading { opacity: 0; }

.t-cursor {
  animation: blink 1s step-end infinite;
  color: var(--accent);
}

@keyframes blink {
  50% { opacity: 0; }
}

/* Sections */
.section {
  position: relative;
  z-index: 1;
  padding: 5rem 0;
}

.section__header {
  margin-bottom: 2.5rem;
}

.section__tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  display: block;
  margin-bottom: 0.5rem;
}

.section__title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section__subtitle {
  color: var(--text-muted);
  margin-top: 0.5rem;
  font-size: 0.95rem;
}

/* Cards */
.card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.card--glass {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
}

.card--glass:hover {
  border-color: var(--border-strong);
}

.card__title {
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
  color: var(--accent);
}

.profile-card p {
  color: var(--text-muted);
  margin-bottom: 1rem;
}

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

.profile-card__highlight {
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--accent);
  background: rgba(56, 189, 248, 0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text) !important;
}

[data-theme="light"] .profile-card__highlight {
  background: rgba(2, 132, 199, 0.06);
}

/* Experience accordion */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.exp-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.exp-item:hover {
  border-color: var(--border-strong);
}

.exp-item[data-expanded="true"] {
  border-color: var(--accent);
  box-shadow: 0 0 30px var(--accent-glow);
}

.exp-item__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1.5rem 1.75rem;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  color: var(--text);
  font-family: inherit;
  gap: 1rem;
  transition: background var(--transition);
}

.exp-item__logo {
  width: 52px;
  height: 52px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 4px;
  flex-shrink: 0;
  border: 1px solid var(--border);
}

.exp-item__logoW {
  width: 45px;
  height: 45px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 4px;
  flex-shrink: 0;
  border: 1px solid var(--border);
}

.exp-item__meta {
  flex: 1;
  min-width: 0;
}

.exp-item__meta--no-logo {
  padding-left: 0;
}

.exp-item__header:hover {
  background: var(--bg-card-hover);
}

.exp-item__period {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  display: block;
  margin-bottom: 0.35rem;
}

.exp-item__role {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.exp-item__company {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.exp-item__chevron {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border: 1px solid var(--border);
  border-radius: 50%;
  position: relative;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.exp-item__chevron::before,
.exp-item__chevron::after {
  content: '';
  position: absolute;
  background: var(--text-muted);
  border-radius: 1px;
  transition: background var(--transition);
}

.exp-item__chevron::before {
  width: 8px;
  height: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.exp-item__chevron::after {
  width: 2px;
  height: 8px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: transform var(--transition), opacity var(--transition);
}

.exp-item[data-expanded="true"] .exp-item__chevron {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.1);
  transform: rotate(180deg);
}

.exp-item[data-expanded="true"] .exp-item__chevron::after {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0);
}

.exp-item__body {
  display: none;
  overflow: hidden;
}

.exp-item[data-expanded="true"] .exp-item__body {
  display: block;
  animation: expReveal 0.35s ease;
}

@keyframes expReveal {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.exp-item__body-inner {
  overflow: hidden;
}

.exp-item__list {
  padding: 0.75rem 1.75rem 1.5rem 3rem;
  list-style: none;
}

.exp-item__list li {
  position: relative;
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 0.6rem;
  padding-left: 0.25rem;
}

.exp-item__list li::before {
  content: '▸';
  position: absolute;
  left: -1.25rem;
  color: var(--accent);
  font-size: 0.75rem;
}

.exp-item__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0 1.75rem 1.25rem;
}

.exp-item[data-expanded="true"] .exp-item__tags {
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.25rem;
}

.exp-item__tags span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--accent);
  background: rgba(56, 189, 248, 0.06);
}

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.skill-group--wide {
  grid-column: 1 / -1;
}

.skill-group__title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.skill-group__icon {
  color: var(--accent);
  font-family: var(--font-mono);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tags span {
  font-size: 0.82rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: all var(--transition);
}

.skill-tags span:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

/* Formation */
.formation-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.courses-section {
  margin-top: 0.5rem;
}

.courses-section__title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.formation-grid--courses {
  margin-bottom: 0;
}

.formation-list {
  list-style: none;
}

.formation-list li {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
}

.formation-list li:last-child {
  border-bottom: none;
}

.formation-list strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
}

.formation-list span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Certifications accordion */
.certs {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.cert-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  overflow: hidden;
}

.cert-item__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1rem 1.25rem;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  text-align: left;
  transition: background var(--transition);
}

.cert-item__header:hover {
  background: var(--bg-card-hover);
}

.cert-item__count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
}

.cert-item__body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s ease;
}

.cert-item[data-expanded="true"] .cert-item__body {
  grid-template-rows: 1fr;
}

.cert-item__body > ul {
  overflow: hidden;
  list-style: none;
  padding: 0 1.25rem 1rem 2rem;
}

.cert-item__body li {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  position: relative;
}

.cert-item__body li::before {
  content: '·';
  position: absolute;
  left: -0.85rem;
  color: var(--accent);
  font-weight: bold;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition), box-shadow var(--transition);
}

a.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--accent);
}

.contact-card__icon {
  font-size: 1.5rem;
}

.contact-card__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-card__value {
  font-size: 0.95rem;
  color: var(--text-muted);
  word-break: break-all;
}

/* Footer */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 2rem;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer p {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.footer__mono {
  font-family: var(--font-mono);
}

/* Mobile nav */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: calc(var(--header-h) + 2rem);
    min-height: auto;
  }

  .hero__terminal {
    order: -1;
  }

  .nav__links {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--header-bg);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition), opacity var(--transition);
  }

  .nav__links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav__links li {
    padding: 0.75rem 1.5rem;
  }

  .nav__menu-btn {
    display: flex;
  }
}

@media (max-width: 600px) {
  .exp-item__header {
    padding: 1.25rem;
  }

  .exp-item__list {
    padding-left: 2.5rem;
    padding-right: 1.25rem;
  }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .exp-item[data-expanded="true"] .exp-item__body {
    animation: none;
  }
}