/* ============================================================
   styles.css — Prabu AI Engineer Portfolio
  Theme: white background, blue/purple accents, dark text, clean tech
   ============================================================ */

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

:root {
  --color-bg:         #ffffff;
  --color-surface:    #f8f9fd;
  --color-border:     #dfe3ef;
  --color-text:       #15182b;
  --color-text-muted: #5e6478;
  --color-accent:     #3659d9;
  --color-accent-hover: #2845b8;
  --color-secondary:  #7655c7;
  --color-tag-bg:     #eef2ff;
  --color-tag-text:   #3346a8;
  --font:             'Inter', 'Roboto', 'Segoe UI', sans-serif;
  --font-mono:        'Inter', 'Roboto', 'Segoe UI', sans-serif;
  --max-width:        1100px;
  --radius:           0.5rem;
  --shadow:           0 8px 24px rgba(33, 43, 91, 0.07);
  --transition:       0.2s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-hover); text-decoration: underline; }
ul { list-style: none; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: 0;
}
h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1rem; }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

.text-accent { color: var(--color-accent); font-weight: 600; }
.text-accent-2 { color: #0f766e; font-weight: 600; }
.text-accent-3 { color: #7c3aed; font-weight: 600; }

/* ---------- Layout helpers ---------- */
.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.section {
  padding-block: 4.5rem;
}

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

.section__header {
  text-align: center;
  margin-bottom: 3rem;
}
.section__header p {
  color: var(--color-text-muted);
  max-width: 540px;
  margin-inline: auto;
  margin-top: 0.5rem;
}

/* ---------- Navigation ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
}

.nav {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  column-gap: 1.5rem;
  height: 128px;
}

.nav__brand {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  flex-shrink: 0;
  color: var(--color-text);
}
.nav__brand:hover { color: var(--color-accent); text-decoration: none; }
.nav__brand-badge {
  display: block;
  position: relative;
  width: 258px;
  height: 84px;
  overflow: hidden;
  flex-shrink: 0;
}
/* Source PNG has large transparent margins around the wordmark; zoom-crop to it. */
.nav__brand-badge img {
  position: absolute;
  max-width: none;
  width: 200.5%;
  height: 411.2%;
  left: -43.2%;
  top: -149.4%;
  object-fit: contain;
}

.nav__links {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  gap: 1.5rem;
  align-items: center;
  justify-self: start;
}

.nav__links a {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav__links a:hover,
.nav__links a.active { color: var(--color-accent); text-decoration: none; }

.nav__admin {
  display: flex;
  align-items: center;
}
.nav__admin .btn {
  padding: 0.35rem 0.8rem;
  font-size: 0.84rem;
}
.nav__admin-link {
  grid-column: 3;
  grid-row: 1;
  justify-self: end;
  flex-shrink: 0;
}
.nav__back-link {
  grid-column: 3;
  grid-row: 1;
  justify-self: end;
  flex-shrink: 0;
  white-space: nowrap;
}

/* Hamburger */
.nav__toggle {
  grid-column: 1;
  grid-row: 1;
  justify-self: start;
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 6px;
  border-radius: var(--radius);
}
.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 900px) {
  .nav { column-gap: 0.75rem; height: 110px; }
  .nav__brand { gap: 0.6rem; }
  .nav__brand-badge { width: 197px; height: 64px; }
  .nav__toggle { display: flex; }
  .nav__admin-link {
    padding: 0.4rem 0.65rem;
    font-size: 0.78rem;
  }

  .nav__links {
    display: none;
    position: absolute;
    top: 110px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 1.25rem;
    gap: 1rem;
    align-items: flex-start;
  }
  .nav__links.is-open { display: flex; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  line-height: 1.4;
}
.btn--primary {
  background: var(--color-accent);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  text-decoration: none;
  color: #fff;
  box-shadow: 0 4px 12px rgba(37,99,235,.3);
}
.btn--outline {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn--outline:hover {
  background: var(--color-accent);
  color: #fff;
  text-decoration: none;
}
.btn--sm { padding: 0.4rem 0.9rem; font-size: 0.875rem; }

@media (max-width: 640px) {
  .nav__admin-link,
  .nav__back-link { padding: 0.4rem 0.5rem; font-size: 0.75rem; }
}

@media (max-width: 400px) {
  .nav__brand { gap: 0; }
}

/* ---------- Admin panel ---------- */
.admin-panel {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.blog-toolbar {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.blog-toolbar__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.blog-toolbar__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
@media (max-width: 640px) {
  .blog-toolbar__content {
    align-items: flex-start;
    flex-direction: column;
  }
  .blog-toolbar__actions {
    justify-content: space-between;
    width: 100%;
  }
}
[hidden] {
  display: none !important;
  visibility: hidden !important;
}

.modal[hidden] {
  display: none !important;
  visibility: hidden !important;
}

.admin-panel__status {
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.95rem;
}
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 1rem;
}
.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(17, 24, 39, 0.55);
  backdrop-filter: blur(3px);
}
.modal__card {
  position: relative;
  width: min(100%, 440px);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  box-shadow: var(--shadow);
  padding: 1.5rem;
}
.modal__close {
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  border: none;
  background: transparent;
  font-size: 1.5rem;
  color: var(--color-text-muted);
  cursor: pointer;
}
.modal__actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  margin-top: 1rem;
}
.form__error {
  margin-top: 0.75rem;
  color: #b91c1c;
  font-size: 0.95rem;
}

/* ---------- Admin login ---------- */
.login-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    linear-gradient(rgba(0,127,139,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,127,139,.055) 1px, transparent 1px),
    var(--color-surface);
  background-size: 32px 32px;
}
.login-layout {
  flex: 1;
  display: grid;
  place-items: center;
  padding: 2rem 1.25rem;
}
.login-panel {
  width: min(100%, 430px);
  padding: 2rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-accent);
  border-radius: var(--radius);
  box-shadow: 0 18px 55px rgba(17, 24, 39, 0.12);
}
.login-panel h1 { font-size: 2rem; }
.login-panel__eyebrow {
  margin-bottom: 0.5rem;
  color: var(--color-accent);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
}
.login-panel__intro {
  margin: 0.75rem 0 1.5rem;
  color: var(--color-text-muted);
}
.login-panel__label-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}
.login-panel__label-row a { font-size: 0.875rem; }
.login-panel__submit { width: 100%; margin-top: 0.5rem; }
.login-panel__submit:disabled { cursor: wait; opacity: 0.7; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  padding-block: 6rem 5rem;
  text-align: left;
  overflow: hidden;
  isolation: isolate;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: linear-gradient(rgba(54,89,217,.055) 1px, transparent 1px), linear-gradient(90deg, rgba(118,85,199,.05) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(to bottom, black, transparent 92%);
  pointer-events: none;
}
.hero__particles {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero__particles canvas {
  display: block;
  width: 100%;
  height: 100%;
}
.hero-shell {
  position: relative;
  z-index: 1;
  max-width: 780px;
  padding: 1rem 0;
}
.hero__eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0;
  font-family: var(--font);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
  background: var(--color-tag-bg);
  padding: 0.25rem 0.75rem;
  border-radius: 3px;
}
.hero h1 {
  margin-bottom: 1rem;
  color: var(--color-text);
  font-family: var(--font);
  font-size: clamp(3.5rem, 9vw, 6.75rem);
  font-weight: 600;
}
.hero__brand {
  display: flex;
  align-items: center;
  gap: 0.18em;
}
.hero__leaf-mark {
  position: relative;
  display: inline-block;
  width: 0.52em;
  height: 0.72em;
  flex: 0 0 auto;
  border-radius: 90% 8% 90% 8%;
  border: 0.035em solid #1f744b;
  background: #67b77d;
  box-shadow: inset -0.07em -0.06em 0 rgba(0, 95, 77, 0.24), 0 0.04em 0.12em rgba(16, 80, 55, 0.14);
  transform: rotate(28deg);
}
.hero__leaf-mark::after {
  content: '';
  position: absolute;
  left: 48%;
  bottom: -0.12em;
  width: 0.035em;
  height: 0.65em;
  border-radius: 999px;
  background: #287a50;
  transform: rotate(18deg);
  transform-origin: bottom;
}
.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-inline: 0;
  margin-bottom: 2rem;
}
.hero__actions {
  display: flex;
  gap: 1rem;
  justify-content: flex-start;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}
.hero__highlights {
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.hero__highlights span {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.8rem;
  border-radius: 3px;
  border: 1px solid rgba(54,89,217,.18);
  background: rgba(54,89,217,.07);
  color: var(--color-accent);
  font-size: 0.875rem;
  font-weight: 600;
}
@media (max-width: 640px) {
  .hero {
    min-height: 560px;
  }
}

/* ---------- Skills strip ---------- */
.skills-strip {
  padding-block: 2rem;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}
.skills-strip__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  justify-content: center;
}
.skills-strip__item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-weight: 500;
}
.skills-strip__item .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}

/* ---------- Cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.project-showcase {
  display: grid;
  grid-template-columns: 1.5fr 0.9fr;
  gap: 1.5rem;
  align-items: stretch;
}
.project-showcase__main {
  min-height: 100%;
}
.project-showcase__eyebrow {
  display: inline-flex;
  align-self: flex-start;
  margin-bottom: 0.6rem;
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  background: rgba(37,99,235,.08);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.project-showcase__side {
  display: grid;
  gap: 1rem;
}
.project-showcase__mini {
  min-height: 0;
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--color-accent);
}
.card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,.12);
  transform: translateY(-2px);
}

.card__title { margin-bottom: 0.5rem; }
.card__desc { color: var(--color-text-muted); font-size: 0.9375rem; flex: 1; }
.card__footer {
  margin-top: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.card__links { display: flex; gap: 0.5rem; }

/* ---------- Tags ---------- */
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.75rem; }
.tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
}

/* ---------- Tech stack pill ---------- */
.tech-stack { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.5rem; }
.tech-pill {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ---------- Blog list ---------- */
.blog-list { display: flex; flex-direction: column; gap: 1.5rem; }
.blog-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
}
.blog-card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,.12);
  transform: translateY(-2px);
}
.blog-card__meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}
.blog-card__title { font-size: 1.2rem; }
.blog-card__excerpt { color: var(--color-text-muted); font-size: 0.9375rem; }
.blog-card__read-more { font-size: 0.875rem; font-weight: 600; }

/* ---------- Blog post page ---------- */
.post-layout {
  max-width: 720px;
  margin-inline: auto;
  padding-block: 3rem;
}
.post-header { margin-bottom: 2.5rem; }
.post-header h1 { margin-bottom: 0.75rem; }
.post-meta {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.post-body h2 { margin: 2rem 0 1rem; }
.post-body h3 { margin: 1.5rem 0 0.75rem; }
.post-body p  { margin-bottom: 1.25rem; }
.post-body ul { list-style: disc; padding-left: 1.5rem; margin-bottom: 1.25rem; }
.post-body li { margin-bottom: 0.4rem; }
.post-body pre {
  background: #f1f5f9;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  overflow-x: auto;
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
}
.post-body code {
  font-family: 'Fira Code', 'Menlo', monospace;
  font-size: 0.875em;
  background: #f1f5f9;
  padding: 0.15em 0.4em;
  border-radius: 3px;
}
.post-body pre code { background: none; padding: 0; }
.post-body blockquote {
  border-left: 4px solid var(--color-accent);
  margin: 1.5rem 0;
  padding: 0.75rem 1.25rem;
  background: var(--color-tag-bg);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--color-text-muted);
}
.comments-section {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}
.comments-section h2 { margin-bottom: 1rem; }
.comments-section h3 { font-size: 1rem; margin-bottom: 0.75rem; }
.comment {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}
.comment__meta {
  display: flex;
  gap: 0.75rem;
  align-items: baseline;
  margin-bottom: 0.35rem;
}
.comment__meta time { color: var(--color-text-muted); font-size: 0.8125rem; }
.comment p { margin-bottom: 0.65rem; white-space: normal; overflow-wrap: anywhere; }

/* ---------- Admin visitor details ---------- */
.visitor-details { margin: 1rem 0; }
.visitor-details__title { font-size: 1rem; margin-bottom: 0.65rem; }
.visitor-details__table-wrap { overflow-x: auto; border: 1px solid var(--color-border); border-radius: var(--radius); }
.visitor-details__table { width: 100%; border-collapse: collapse; font-size: 0.78rem; min-width: 680px; }
.visitor-details__table th,
.visitor-details__table td { padding: 0.6rem 0.7rem; border-bottom: 1px solid var(--color-border); text-align: left; vertical-align: top; }
.visitor-details__table th { background: var(--color-surface); color: var(--color-text-muted); font-weight: 600; }
.visitor-details__table tr:last-child td { border-bottom: 0; }
.visitor-details__note { color: var(--color-text-muted); font-size: 0.75rem; margin-top: 0.5rem; }

/* ---------- About page ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  align-items: start;
}
@media (max-width: 700px) {
  .about-grid { grid-template-columns: 1fr; }
  .project-showcase { grid-template-columns: 1fr; }
}
.about-avatar {
  width: 100%;
  max-width: 220px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--color-surface);
  border: 3px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  margin-inline: auto;
}
.skill-list { display: flex; flex-direction: column; gap: 0.75rem; }
.skill-item { display: flex; flex-direction: column; gap: 0.3rem; }
.skill-item__label {
  font-size: 0.875rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
}
.skill-bar {
  height: 6px;
  background: var(--color-border);
  border-radius: 999px;
  overflow: hidden;
}
.skill-bar__fill {
  height: 100%;
  background: var(--color-accent);
  border-radius: 999px;
  transition: width 0.8s ease;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
}
.service-card {
  padding: 1.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.service-card__icon { font-size: 2rem; margin-bottom: 0.75rem; }
.service-card h3 { margin-bottom: 0.4rem; }
.service-card p { font-size: 0.9rem; color: var(--color-text-muted); }

/* ---------- Embeddings explainer ---------- */
.embeddings-section { border-left: 4px solid var(--color-accent); padding-left: 1.5rem; }

/* ---------- Contact page ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  align-items: start;
}
@media (max-width: 720px) {
  .contact-grid { grid-template-columns: 1fr; }
}
.contact-info h2 { margin-bottom: 1rem; }
.contact-info p { color: var(--color-text-muted); margin-bottom: 1.5rem; }
.contact-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  font-size: 0.9375rem;
}
.contact-item__icon { font-size: 1.25rem; }

/* Form */
.form { display: flex; flex-direction: column; gap: 1.25rem; }
.form__group { display: flex; flex-direction: column; gap: 0.35rem; }
.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
@media (max-width: 540px) {
  .form__row { grid-template-columns: 1fr; }
}
.form__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}
.form__input,
.form__textarea,
.form__select {
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.9375rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}
.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,.15);
}
.form__input.error,
.form__textarea.error { border-color: #ef4444; }
.form__textarea { resize: vertical; min-height: 140px; }
.form__error {
  font-size: 0.8125rem;
  color: #ef4444;
  display: none;
}
.form__error.visible { display: block; }
.form__status {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  display: none;
}
.form__status.success { background: #dcfce7; color: #166534; display: block; }
.form__status.error-msg { background: #fee2e2; color: #991b1b; display: block; }

/* ---------- Feature strip (home) ---------- */
.feature-strip {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
}
.feature {
  text-align: center;
  padding: 1.75rem 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  box-shadow: var(--shadow);
}
.feature:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}
.feature__icon { font-size: 2.25rem; margin-bottom: 0.75rem; }
.feature h3 { font-size: 1rem; margin-bottom: 0.4rem; }
.feature p { font-size: 0.875rem; color: var(--color-text-muted); margin: 0; }

/* ---------- Process / how I work (home) ---------- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}
.process-step {
  position: relative;
  padding: 1.75rem 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  transition: transform var(--transition), box-shadow var(--transition);
}
.process-step:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.process-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 3px;
  font-family: var(--font-mono);
  background: var(--color-tag-bg);
  color: var(--color-accent);
  font-weight: 700;
  font-size: 0.875rem;
  margin-bottom: 0.9rem;
}
.process-step h3 { font-size: 1rem; margin-bottom: 0.4rem; }
.process-step p { font-size: 0.875rem; color: var(--color-text-muted); margin: 0; }

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Pagination (blog) ---------- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}
.page-btn {
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
}
.page-btn:hover, .page-btn.active {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ---------- Filter bar (projects / blog) ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}
.filter-btn {
  padding: 0.4rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition);
}
.filter-btn:hover, .filter-btn.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: 2.5rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}
.site-footer a { color: var(--color-text-muted); }
.site-footer a:hover { color: var(--color-accent); }
.footer-brand {
  display: inline-flex;
  align-items: center;
  margin-bottom: 1.25rem;
}
.footer-brand:hover { opacity: 0.85; }
.footer-brand img { width: 42px; height: 42px; object-fit: contain; }
.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

/* ---------- Badge / stats strip ---------- */
.stats-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
  padding-block: 3rem;
}
.stat {
  text-align: center;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius);
  transition: transform var(--transition);
}
.stat:hover { transform: translateY(-2px); }
.stat__number {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-accent);
  font-family: var(--font-mono);
  line-height: 1;
  margin-bottom: 0.25rem;
}
.stat__label { font-size: 0.875rem; color: var(--color-text-muted); }

/* ---------- CTA banner ---------- */
.cta-banner {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-accent), #1d4ed8);
  color: #fff;
  text-align: center;
}
.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 15% 20%, rgba(255,255,255,.14), transparent 45%),
              radial-gradient(circle at 85% 80%, rgba(255,255,255,.10), transparent 45%);
  pointer-events: none;
}
.cta-banner__content { position: relative; z-index: 1; }
.cta-banner h2 { color: #fff; margin-bottom: 0.5rem; }
.cta-banner p { color: rgba(255,255,255,.85); margin-bottom: 1.5rem; }
.cta-banner .btn { background: #fff; color: var(--color-accent); }
.cta-banner .btn:hover { background: #f3f4f6; }

/* ---------- Back-to-top ---------- */
#back-to-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  border: none;
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(37,99,235,.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}
#back-to-top.visible { opacity: 1; pointer-events: auto; }