/* =====================================================
   DESIGN TOKENS
   ===================================================== */
:root {
  --color-primary:      #0b1d30;
  --color-accent:       #9e4c1a;
  --color-accent-light: #c87840;
  --color-bg:           #e5e0d8;
  --color-surface:      #eee9e2;
  --color-text:         #0e1824;
  --color-muted:        #4d5e6e;
  --color-border:       #cac3ba;

  --font-body:    'Inter', system-ui, sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;

  --radius:    12px;
  --radius-sm: 6px;
  --shadow:       0 4px 24px rgba(30, 58, 95, 0.07);
  --shadow-hover: 0 8px 32px rgba(30, 58, 95, 0.13);

  --container:   1100px;
  --section-gap: 5.5rem;
}

/* =====================================================
   RESET & BASE
   ===================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 1rem;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* =====================================================
   LAYOUT
   ===================================================== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.section     { padding: var(--section-gap) 0; }
.section-alt { background: var(--color-surface); }

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.3rem);
  color: var(--color-primary);
  margin-bottom: 2.5rem;
  position: relative;
  padding-bottom: 0.75rem;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 3rem; height: 3px;
  background: var(--color-accent);
  border-radius: 2px;
}
.section-sub {
  color: var(--color-muted);
  font-size: 1.05rem;
  margin-bottom: 2rem;
  max-width: 560px;
}

/* =====================================================
   HEADER & NAV
   ===================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  height: 64px;
  position: relative;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.04em;
  margin-right: auto;
}
.nav-links {
  display: flex;
  gap: 2rem;
}
.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-muted);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--color-primary); }

.lang-toggle {
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s;
  font-family: var(--font-body);
  letter-spacing: 0.05em;
}
.lang-toggle:hover { background: var(--color-accent); }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}

/* =====================================================
   HERO
   ===================================================== */
.hero {
  padding: 5rem 0 4rem;
  background: linear-gradient(140deg, #0b1d30 0%, #152e4c 60%, #0b2236 100%);
}
.hero-inner {
  display: flex;
  align-items: center;
  gap: 4rem;
}

/* Photo */
.hero-photo { flex-shrink: 0; }
.hero-img {
  width: 210px; height: 210px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.35);
  border: 4px solid rgba(255, 255, 255, 0.15);
}
.photo-placeholder {
  width: 210px; height: 210px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent) 0%, #c87840 100%);
  color: #fff;
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.35);
  border: 4px solid rgba(255, 255, 255, 0.15);
  user-select: none;
}

/* Text */
.hero-text { flex: 1; min-width: 0; }
.hero-greeting {
  font-size: 0.88rem;
  color: var(--color-accent-light);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}
.hero-name {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  color: #ffffff;
  line-height: 1.1;
  margin-bottom: 0.4rem;
}
.hero-title {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.6);
  font-weight: 500;
  margin-bottom: 1rem;
}
.hero-sub {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.72);
  max-width: 520px;
  margin-bottom: 2rem;
  line-height: 1.75;
}
.hero-actions {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-bottom: 1.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.6rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, transform 0.15s, box-shadow 0.2s;
  border: 2px solid transparent;
  font-family: var(--font-body);
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn-primary:hover {
  background: #b05a22;
  border-color: #b05a22;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(200, 105, 42, 0.3);
}
.btn-outline {
  background: transparent;
  color: rgba(255, 255, 255, 0.88);
  border-color: rgba(255, 255, 255, 0.4);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.65);
  transform: translateY(-2px);
}
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* Social links */
.hero-links { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.5);
  transition: color 0.2s;
}
.social-link:hover { color: var(--color-accent-light); }

/* =====================================================
   ABOUT
   ===================================================== */
.about-grid {
  max-width: 720px;
}
.about-text p {
  color: #4a5568;
  font-size: 1.02rem;
  margin-bottom: 1.1rem;
}
.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.highlight-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem 1rem;
  text-align: center;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s, transform 0.2s;
}
.highlight-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.highlight-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 0.4rem;
}
.highlight-label {
  font-size: 0.82rem;
  color: var(--color-muted);
  font-weight: 500;
  line-height: 1.3;
}

/* =====================================================
   EXPERIENCE TIMELINE
   ===================================================== */
.timeline {
  position: relative;
  padding-left: 2rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0.5rem; bottom: 0.5rem;
  width: 2px;
  background: var(--color-border);
}
.timeline-item {
  position: relative;
  margin-bottom: 2rem;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-2rem - 5px);
  top: 0.5rem;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-surface);
  box-shadow: 0 0 0 2px var(--color-accent);
}
.timeline-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s, transform 0.2s;
}
.timeline-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateX(4px);
}
.timeline-dates {
  font-size: 0.78rem;
  color: var(--color-accent);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.3rem;
}
.timeline-role {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.2rem;
}
.timeline-company {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 1rem;
}
.timeline-bullets { padding: 0; }
.timeline-bullets li {
  position: relative;
  padding-left: 1.1rem;
  color: #4a5568;
  font-size: 0.94rem;
  margin-bottom: 0.4rem;
  line-height: 1.6;
}
.timeline-bullets li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
  line-height: 1.6;
}

/* =====================================================
   SKILLS
   ===================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.skills-sub {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}
.section-sub-heading {
  margin-top: 3rem;
  margin-bottom: 1.25rem;
}
.tags { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.tag {
  background: #eef2f8;
  color: var(--color-primary);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  border: 1px solid #d8e2f0;
  transition: background 0.15s;
}
.tag:hover { background: #dde7f5; }

/* Certifications */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}
.cert-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s, transform 0.2s;
}
.cert-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.cert-icon {
  width: 46px; height: 46px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary) 0%, #2d5a9e 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #fff;
  font-weight: 800;
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  font-family: var(--font-body);
}
.cert-name {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.35;
}
.cert-issuer {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-top: 0.15rem;
}

/* Education */
.edu-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.3rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.1rem;
  box-shadow: var(--shadow);
  max-width: 600px;
}
.edu-icon {
  width: 46px; height: 46px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-accent) 0%, #e8894a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #fff;
}
.edu-degree {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}
.edu-school {
  font-size: 0.87rem;
  color: var(--color-muted);
  margin-top: 0.15rem;
}
.edu-note {
  font-size: 0.82rem;
  color: var(--color-accent);
  margin-top: 0.2rem;
  font-style: italic;
}

/* =====================================================
   CONTACT FORM
   ===================================================== */
.contact-container { max-width: 680px; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}
.form-row .form-group { margin-bottom: 0; }
.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
}
.form-group input,
.form-group textarea {
  padding: 0.65rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}
.form-group textarea {
  resize: vertical;
  min-height: 130px;
}
.cf-turnstile { margin: 1rem 0 1.25rem; }
#submitBtn { margin-top: 0.25rem; }
.form-status {
  margin-top: 1rem;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  display: none;
}
.form-status.success { background: #d1fae5; color: #065f46; display: block; }
.form-status.error   { background: #fee2e2; color: #991b1b; display: block; }

/* =====================================================
   FOOTER
   ===================================================== */
.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
  padding: 2rem 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-copy { font-size: 0.88rem; }
.footer-links { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.footer-links a {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.65);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--color-accent-light); }

/* =====================================================
   MODE TOGGLE (Human / Agentic)
   ===================================================== */
.mode-toggle {
  display: flex;
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
}
.mode-btn {
  padding: 0.28rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border: none;
  background: transparent;
  color: var(--color-muted);
  cursor: pointer;
  font-family: var(--font-body);
  transition: background 0.15s, color 0.15s;
  line-height: 1;
}
.mode-btn.mode-active {
  background: var(--color-primary);
  color: #fff;
}
.mode-btn:not(.mode-active):hover {
  background: rgba(11, 29, 48, 0.08);
  color: var(--color-primary);
}

/* =====================================================
   AGENT VIEW
   ===================================================== */
.agent-view {
  display: none;
  position: fixed;
  top: 64px; left: 0; right: 0; bottom: 0;
  background: #07101a;
  z-index: 90;
  overflow-y: auto;
}
body.agent-mode .agent-view  { display: block; }
body.agent-mode .hero,
body.agent-mode #about,
body.agent-mode #experience,
body.agent-mode #skills,
body.agent-mode #contact,
body.agent-mode .footer       { display: none; }

.av-bar {
  position: sticky;
  top: 0;
  background: #0d1e2e;
  border-bottom: 1px solid #1a3a54;
  padding: 0.55rem 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  z-index: 10;
}
.av-badge {
  font-family: 'Consolas', 'Cascadia Code', 'Fira Code', monospace;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #4fc3f7;
  background: rgba(79, 195, 247, 0.1);
  border: 1px solid rgba(79, 195, 247, 0.25);
  padding: 0.18rem 0.55rem;
  border-radius: 4px;
}
.av-desc {
  font-size: 0.78rem;
  color: #3d5a6e;
  font-family: monospace;
  flex: 1;
}
.av-copy {
  font-size: 0.75rem;
  font-weight: 600;
  font-family: monospace;
  background: rgba(79, 195, 247, 0.08);
  color: #4fc3f7;
  border: 1px solid rgba(79, 195, 247, 0.25);
  border-radius: 4px;
  padding: 0.22rem 0.7rem;
  cursor: pointer;
  transition: background 0.15s;
}
.av-copy:hover { background: rgba(79, 195, 247, 0.18); }

.av-content {
  max-width: 860px;
  margin: 0 auto;
  padding: 2rem 2rem 4rem;
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', 'Courier New', monospace;
  font-size: 0.83rem;
  line-height: 1.8;
  color: #7a8fa3;
  white-space: pre-wrap;
  word-break: break-word;
}
.av-sep      { color: #14304a; display: block; }
.av-heading  { color: #4fc3f7; font-weight: bold; }
.av-section  { color: #4fc3f7; font-weight: bold; display: block; }
.av-key      { color: #80cbc4; }
.av-val      { color: #c3e88d; }
.av-num      { color: #f78c6c; }
.av-bullet   { color: #ffcb6b; }
.av-dim      { color: #2a4a60; }
.av-white    { color: #dde6ef; }
.av-check    { color: #c3e88d; }
.av-link     { color: #82aaff; text-decoration: none; }
.av-link:hover { text-decoration: underline; }

/* =====================================================
   RESPONSIVE — Tablet
   ===================================================== */
@media (max-width: 860px) {
  .about-grid    { grid-template-columns: 1fr; gap: 2.5rem; }
  .skills-grid   { grid-template-columns: 1fr 1fr; }
}

/* =====================================================
   RESPONSIVE — Mobile
   ===================================================== */
@media (max-width: 640px) {
  :root { --section-gap: 4rem; }

  /* Nav mobile */
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: var(--color-surface);
    padding: 1rem 1.5rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
    gap: 1rem;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  }
  .nav-hamburger { display: flex; }

  /* Hero mobile */
  .hero-inner {
    flex-direction: column;
    text-align: center;
    gap: 2rem;
  }
  .hero-actions, .hero-links { justify-content: center; }
  .hero-sub { margin: 0 auto 2rem; }

  /* Grids */
  .skills-grid { grid-template-columns: 1fr; }
  .form-row    { grid-template-columns: 1fr; }

  /* Footer */
  .footer-inner  { flex-direction: column; text-align: center; }
  .footer-links  { justify-content: center; }

  /* Timeline */
  .timeline { padding-left: 1.5rem; }
  .timeline-item::before { left: calc(-1.5rem - 5px); }
}

@media (max-width: 420px) {
  .about-highlights { grid-template-columns: 1fr 1fr; }
  .hero-actions { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; }
}