/*
Theme Name: RafaLibs Portfolio
Theme URI: https://filgs.com.br
Description: Tema minimalista para portfólio pessoal baseado no design system Autonomous Kinetic Minimal
Author: Rafael Filgueiras
Author URI: https://filgs.com.br
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: rafalibs
Tags: minimal, dark, portfolio, blog
*/

/* ========================================
   CSS Variables - Design System Colors
   ======================================== */
:root {
  /* Surface Colors */
  --surface-dim: #121318;
  --surface: #121318;
  --surface-container-lowest: #0d0e13;
  --surface-container-low: #1a1b21;
  --surface-container: #1e1f25;
  --surface-container-high: #292a2f;
  --surface-container-highest: #34343a;
  --surface-bright: #38393f;

  /* Text Colors */
  --on-surface: #e3e1e9;
  --on-surface-variant: #bac9cc;
  --outline: #849396;
  --outline-variant: #3b494c;

  /* Primary - Neural Cyan */
  --primary: #c3f5ff;
  --primary-container: #00e5ff;
  --on-primary: #00363d;
  --on-primary-container: #00626e;
  --primary-fixed: #9cf0ff;
  --primary-fixed-dim: #00daf3;

  /* Secondary - Synthetic Violet */
  --secondary: #d0bcff;
  --secondary-container: #571bc1;
  --on-secondary: #3c0091;
  --on-secondary-container: #c4abff;
  --secondary-fixed: #e9ddff;
  --secondary-fixed-dim: #d0bcff;

  /* Tertiary - Telemetry Emerald */
  --tertiary: #a8ffd2;
  --tertiary-container: #5be9ad;
  --on-tertiary: #003824;
  --on-tertiary-container: #006645;
  --tertiary-fixed: #6ffbbe;
  --tertiary-fixed-dim: #4edea3;

  /* Error */
  --error: #ffb4ab;
  --error-container: #93000a;
  --on-error: #690005;
  --on-error-container: #ffdad6;

  /* Background */
  --background: #121318;
  --on-background: #e3e1e9;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --margin: 3rem;
  --margin-mobile: 1.25rem;
  --gutter: 1.5rem;
  --gutter-mobile: 1rem;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Radius */
  --radius-sm: 0.125rem;
  --radius: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
}

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

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

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  color: var(--on-surface);
  background-color: var(--background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background-color: var(--primary-container);
  color: var(--on-primary-container);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--primary-fixed);
}

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

/* ========================================
   Typography
   ======================================== */
.font-display-hero {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.font-headline-lg {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.font-headline-md {
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.015em;
}

.font-body-lg {
  font-size: 1.125rem;
  line-height: 1.75;
  letter-spacing: -0.01em;
}

.font-body-md {
  font-size: 0.9375rem;
  line-height: 1.6;
  letter-spacing: -0.005em;
}

.font-label-mono-sm {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  line-height: 1.45;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.font-label-mono-md {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

/* ========================================
   Layout
   ======================================== */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 var(--margin-mobile);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--margin);
  }
}

/* ========================================
   Header
   ======================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(18, 19, 24, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  height: 64px;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 var(--margin-mobile);
}

@media (min-width: 768px) {
  .header-inner {
    padding: 0 var(--margin);
  }
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.logo-text {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--primary);
  letter-spacing: 0.1em;
}

.logo-divider {
  color: var(--outline);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
}

.logo-slug {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--on-surface-variant);
  transition: color 0.2s ease;
}

.logo:hover .logo-slug {
  color: var(--on-surface);
}

.status-badge {
  display: none;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.25rem 0.5rem;
  background: var(--surface-container-lowest);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

@media (min-width: 640px) {
  .status-badge {
    display: flex;
  }
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--tertiary);
  animation: pulse 2s infinite;
}

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

.status-text {
  color: var(--tertiary);
}

.nav-menu {
  display: none;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 768px) {
  .nav-menu {
    display: flex;
  }
}

.nav-link {
  padding: 0.25rem 0.5rem;
  color: var(--on-surface-variant);
  font-size: 0.9375rem;
  border-radius: var(--radius-lg);
  transition: all 0.2s ease;
}

.nav-link:hover {
  color: var(--on-surface);
  background: var(--surface-container);
}

.nav-link.active {
  color: var(--primary);
  background: var(--surface-container-high);
  font-weight: 500;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.nav-center {
  display: none;
}

@media (min-width: 768px) {
  .nav-center {
    display: flex;
    align-items: center;
    gap: var(--space-md);
  }
}

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

.social-link {
  padding: 0.25rem 0.5rem;
  background: var(--surface-container-lowest);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--on-surface-variant);
  transition: all 0.2s ease;
  white-space: nowrap;
}

.social-link:hover {
  background: var(--surface-container);
  color: var(--on-surface);
}

/* ========================================
   Main Content
   ======================================== */
.site-main {
  padding-top: 2em;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  position: relative;
  padding: 3em, 0, 0, 0;
  overflow: hidden;
}

.hero-bg-glow {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 840px;
  height: 320px;
  background: rgba(0, 229, 255, 0.03);
  filter: blur(120px);
  pointer-events: none;
  border-radius: 50%;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 1024px) {
  .hero-grid {
    /* grid-template-columns: 8fr 4fr; */
  }
}

.availability-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.25rem 0.75rem;
  background: var(--surface-container-high);
  border-radius: 9999px;
  color: var(--tertiary);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.availability-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--tertiary);
  animation: pulse 2s infinite;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--on-surface);
  margin: 0 0 var(--space-md) 0;
}

.hero-title-highlight {
  color: var(--primary);
}

.hero-bio {
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--on-surface-variant);
  max-width: 48rem;
  margin: 0 0 var(--space-sm) 0;
  font-weight: normal;
}

.hero-bio strong {
  color: var(--on-surface);
  font-weight: 600;
}

.hero-bio-secondary {
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--on-surface-variant);
  max-width: 48rem;
  margin: 0 0 var(--space-lg) 0;
  font-weight: normal;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-xl);
  font-size: 0.8375rem !important;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary-container);
  color: var(--on-primary-container);
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 24px rgba(0, 229, 255, 0.25);
  color: var(--on-primary-container);
}

.btn-secondary {
  background: var(--surface-container-high);
  color: var(--on-surface);
}

.btn-secondary:hover {
  background: var(--surface-bright);
  color: var(--on-surface);
}

.btn-ghost {
  background: var(--surface-container-low);
  color: var(--on-surface-variant);
}

.btn-ghost:hover {
  background: var(--surface-container);
  color: var(--on-surface);
}

.btn-error {
  background: var(--error);
  color: var(--on-error);
}

.btn-error:hover {
  background: var(--error-container);
  color: var(--on-error-container);
}

/* ========================================
   Section Styles
   ======================================== */
.section {
  padding: var(--space-xl) 0;
}

.section-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

@media (min-width: 768px) {
  .section-header {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }
}

.section-label {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
}

.section-divider {
  color: var(--outline);
}

.section-tag {
  color: var(--on-surface-variant);
}

.section-tag.live {
  color: var(--error);
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-weight: 700;
}

.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--error);
  animation: ping 1.5s infinite;
}

@keyframes ping {
  0% { transform: scale(1); opacity: 1; }
  75%, 100% { transform: scale(2); opacity: 0; }
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.025em;
  color: var(--on-surface);
  margin: var(--space-xs) 0 0 0;
}

.section-description {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--on-surface-variant);
  max-width: 48rem;
  margin: var(--space-sm) 0 0 0;
}

/* ========================================
   Bento Grid
   ======================================== */
.bento-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .bento-grid {
    grid-template-columns: 2fr;
  }
}

@media (min-width: 1024px) {
  .bento-grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
  .bento-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ========================================
   Cards
   ======================================== */
.card {
  background: var(--surface-container);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.card-image {
  position: relative;
  height: 180px;
  overflow: hidden;
  background: var(--surface-container-highest);
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.card:hover .card-image img {
  transform: scale(1.05);
}

.card-image-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--surface-container), transparent 60%);
}

.card-badge {
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  padding: 0.125rem 0.5rem;
  background: rgba(13, 14, 19, 0.9);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card-badge.ai { color: var(--primary); }
.card-badge.mobile { color: var(--tertiary); }
.card-badge.obs { color: var(--secondary-fixed); }
.card-badge.rag { color: var(--primary); }

.card-badge-type {
  position: absolute;
  bottom: 0.5rem;
  right: 0.5rem;
  padding: 0.125rem 0.5rem;
  background: var(--surface-container-lowest);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--on-surface);
}

.card-content {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.card-series {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--outline-variant);
  letter-spacing: 0.03em;
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--on-surface);
  transition: color 0.2s ease;
}

.card:hover .card-title {
  color: var(--primary);
}

.card-excerpt {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--on-surface-variant);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--on-surface-variant);
}

.card-link {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--tertiary);
}

.card-link:hover {
  color: var(--tertiary-fixed);
}

/* ========================================
   Pillar Cards (Specialties)
   ======================================== */
.pillar-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .pillar-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.pillar-card {
  background: var(--surface-container-low);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

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

.pillar-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  background: var(--surface-container-high);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.pillar-icon.primary { color: var(--primary); }
.pillar-icon.secondary { color: var(--secondary-fixed); }
.pillar-icon.tertiary { color: var(--tertiary); }

.pillar-domain {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius);
}

.pillar-domain.primary { background: var(--surface-container); color: var(--primary); }
.pillar-domain.secondary { background: var(--surface-container); color: var(--secondary-fixed); }
.pillar-domain.tertiary { background: var(--surface-container); color: var(--tertiary); }

.pillar-title {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--on-surface);
  margin: 0;
}

.pillar-description {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--on-surface-variant);
  margin: 0;
}

.pillar-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  padding-top: var(--space-sm);
}

.tag {
  padding: 0.25rem 0.5rem;
  background: var(--surface-container-high);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--on-surface);
}

.tag.primary { color: var(--primary); }
.tag.secondary { color: var(--secondary-fixed); }
.tag.tertiary { color: var(--tertiary); }
.tag.outline { color: var(--outline); }

/* ========================================
   Qualification Cards
   ======================================== */
.qualification-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .qualification-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .qualification-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.qualification-card {
  background: var(--surface-container);
  border-radius: var(--radius-xl);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.qualification-header {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.qualification-icon {
  font-size: 1.375rem;
}

.qualification-icon.primary { color: var(--primary); }
.qualification-icon.tertiary { color: var(--tertiary); }
.qualification-icon.secondary { color: var(--secondary-fixed); }

.qualification-type {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.qualification-type.primary { color: var(--primary); }
.qualification-type.tertiary { color: var(--tertiary); }
.qualification-type.secondary { color: var(--secondary-fixed); }

.qualification-title {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--on-surface);
  margin: 0;
  line-height: 1.3;
}

.qualification-description {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--on-surface-variant);
  margin: 0;
}

.qualification-card.span-2 {
  grid-column: span 1;
}

@media (min-width: 768px) {
  .qualification-card.span-2 {
    grid-column: span 2;
  }
}

/* ========================================
   Contact Section
   ======================================== */
.contact-section {
  position: relative;
  background: var(--surface-container-low);
  border-radius: var(--radius-2xl, 1rem);
  padding: var(--space-lg);
  overflow: hidden;
  margin-bottom: var(--space-lg);
}

@media (min-width: 768px) {
  .contact-section {
    padding: var(--space-xl);
  }
}

.contact-glow {
  position: absolute;
  right: -4rem;
  bottom: -4rem;
  width: 24rem;
  height: 24rem;
  background: rgba(0, 229, 255, 0.03);
  filter: blur(90px);
  pointer-events: none;
  border-radius: 50%;
}

.contact-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 1024px) {
  .contact-grid {
    grid-template-columns: 5fr 7fr;
  }
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.contact-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  background: var(--surface-container);
  border-radius: var(--radius-lg);
  transition: background 0.2s ease;
}

.contact-link:hover {
  background: var(--surface-container-high);
}

.contact-link-icon {
  font-size: 1.25rem;
}

.contact-link-icon.primary { color: var(--primary); }
.contact-link-icon.tertiary { color: var(--tertiary); }
.contact-link-icon.error { color: var(--error); }

.contact-link-content {
  display: flex;
  flex-direction: column;
}

.contact-link-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--outline-variant);
  letter-spacing: 0.03em;
}

.contact-link-value {
  font-size: 0.875rem;
  color: var(--on-surface);
  font-weight: 500;
}

/* ========================================
   Contact Form
   ======================================== */
.contact-form {
  background: var(--surface-container);
  border-radius: var(--radius-xl);
  padding: var(--space-md);
}

@media (min-width: 768px) {
  .contact-form {
    padding: var(--space-lg);
  }
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

@media (min-width: 640px) {
  .form-grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--on-surface-variant);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.5rem 0.75rem;
  background: var(--surface-container-lowest);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  color: var(--on-surface);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  transition: all 0.2s ease;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--outline-variant);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary);
}

.form-textarea {
  resize: none;
  min-height: 100px;
}

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23849396' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.5rem;
}

.form-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-xs);
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.form-note {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--outline);
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.5rem 1rem;
  background: var(--primary-container);
  color: var(--on-primary-container);
  border: none;
  border-radius: var(--radius-xl);
  font-size: 0.8375rem !important;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-submit:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
  width: 100%;
  background: var(--surface-container-lowest);
  padding: var(--space-xl) 0;
  margin-top: var(--space-xl);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.footer-logo-text {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--primary);
}

.footer-logo-divider {
  color: var(--outline-variant);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
}

.footer-role {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--on-surface-variant);
}

.footer-tagline {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--outline);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
}

.footer-link {
  color: var(--on-surface-variant);
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: var(--primary);
}

.footer-divider {
  color: var(--outline-variant);
}

.footer-copyright {
  color: var(--outline);
}

/* ========================================
   Blog / Articles
   ======================================== */
.posts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .posts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .posts-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.post-card {
  background: var(--surface-container);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all 0.3s ease;
}

.post-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.post-card-image {
  height: 200px;
  overflow: hidden;
  background: var(--surface-container-highest);
}

.post-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.post-card:hover .post-card-image img {
  transform: scale(1.05);
}

.post-card-content {
  padding: var(--space-md);
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--outline);
}

.post-card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--on-surface);
  margin: 0 0 var(--space-sm) 0;
  line-height: 1.3;
  transition: color 0.2s ease;
}

.post-card:hover .post-card-title {
  color: var(--primary);
}

.post-card-excerpt {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--on-surface-variant);
  margin: 0;
}

.post-card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  margin-top: var(--space-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--primary);
}

/* ========================================
   Single Post
   ======================================== */
.single-post {
  max-width: 48rem;
  margin: 0 auto;
  padding: var(--space-xl) var(--margin-mobile);
}

.single-post-header {
  margin-bottom: var(--space-xl);
}

.single-post-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.025em;
  color: var(--on-surface);
  margin: var(--space-md) 0;
}

.single-post-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--outline);
}

.single-post-content {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--on-surface);
}

.single-post-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--on-surface);
  margin: var(--space-xl) 0 var(--space-md) 0;
}

.single-post-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--on-surface);
  margin: var(--space-lg) 0 var(--space-sm) 0;
}

.single-post-content p {
  margin: 0 0 var(--space-md) 0;
}

.single-post-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.single-post-content a:hover {
  color: var(--primary-fixed);
}

.single-post-content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--surface-container);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius);
}

.single-post-content pre {
  background: var(--surface-container-lowest);
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  margin: var(--space-md) 0;
}

.single-post-content pre code {
  background: none;
  padding: 0;
}

.single-post-content ul,
.single-post-content ol {
  margin: 0 0 var(--space-md) 0;
  padding-left: var(--space-lg);
}

.single-post-content li {
  margin-bottom: var(--space-xs);
}

.single-post-content blockquote {
  border-left: 3px solid var(--primary);
  padding-left: var(--space-md);
  margin: var(--space-md) 0;
  color: var(--on-surface-variant);
  font-style: italic;
}

/* ========================================
   Page Template
   ======================================== */
.page-template {
  max-width: 48rem;
  margin: 0 auto;
  padding: var(--space-xl) var(--margin-mobile);
}

.page-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--on-surface);
  margin: 0 0 var(--space-lg) 0;
}

.page-content {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--on-surface);
}

/* ========================================
   Utilities
   ======================================== */
.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-tertiary { color: var(--tertiary); }
.text-error { color: var(--error); }
.text-outline { color: var(--outline); }
.text-on-surface { color: var(--on-surface); }
.text-on-surface-variant { color: var(--on-surface-variant); }

.bg-surface { background-color: var(--surface); }
.bg-surface-container { background-color: var(--surface-container); }
.bg-surface-container-low { background-color: var(--surface-container-low); }
.bg-surface-container-lowest { background-color: var(--surface-container-lowest); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.5s ease forwards;
}

/* ========================================
   Responsive Helpers
   ======================================== */
@media (max-width: 767px) {
  .hide-mobile {
    display: none !important;
  }
}

@media (min-width: 768px) {
  .hide-desktop {
    display: none !important;
  }
}