/* =====================================================
   S M Sanaullah Portfolio — style.css
   Minimal Hacker Aesthetic | JetBrains Mono
   System Dark/Light Mode Support
   ===================================================== */

/* ---------- CSS Variables / Theme ---------- */
:root {
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  /* Light Mode Defaults */
  --bg:        #f8f8f6;
  --bg-alt:    #f0f0ec;
  --bg-card:   #ffffff;
  --border:    #d8d8d2;
  --text:      #1a1a1a;
  --text-muted:#6b6b6b;
  --accent:    #0a6640;
  --accent-hl: #0d8050;
  --prompt:    #0a6640;
  --comment:   #888880;
  --val:       #2563eb;
  --key:       #c2410c;
  --fn:        #7c3aed;
  --shadow:    rgba(0,0,0,0.08);
  --glow:      rgba(10,102,64,0.15);
  --nav-bg:    rgba(248,248,246,0.92);
  --terminal-bg:#1e2027;
  --terminal-text:#d4d4d4;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #0d0f0e;
    --bg-alt:    #141614;
    --bg-card:   #181b19;
    --border:    #2a2e2a;
    --text:      #e8e8e0;
    --text-muted:#7a7a72;
    --accent:    #22c55e;
    --accent-hl: #4ade80;
    --prompt:    #22c55e;
    --comment:   #6a9955;
    --val:       #79b8ff;
    --key:       #f97583;
    --fn:        #b392f0;
    --shadow:    rgba(0,0,0,0.4);
    --glow:      rgba(34,197,94,0.12);
    --nav-bg:    rgba(13,15,14,0.94);
    --terminal-bg:#0d1117;
    --terminal-text:#c9d1d9;
  }
}

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

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

body {
  font-family: var(--font-mono);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

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

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

img { max-width: 100%; }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ---------- Utilities ---------- */
.prompt { color: var(--prompt); font-weight: 700; }
.blink {
  animation: blink 1.2s step-end infinite;
  color: var(--accent);
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- Navigation ---------- */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav-logo {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  white-space: nowrap;
}

.nav-logo:hover { color: var(--accent); }

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.25rem;
  align-items: center;
}

.nav-link {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.4rem 0.75rem;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
  letter-spacing: 0.02em;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent);
  background: var(--glow);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Sections ---------- */
section {
  padding: 6rem 2rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

#home { padding-top: 5rem; }

.section-container {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.section-num {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 700;
  white-space: nowrap;
}

.section-header h2 {
  font-size: 1.6rem;
  font-weight: 700;
  white-space: nowrap;
  letter-spacing: -0.02em;
}

.section-line {
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ---------- Home Section ---------- */
.home-container {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.home-greeting {
  font-size: 0.85rem;
  color: var(--comment);
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
}

.home-name {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.home-title {
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
  min-height: 1.5em;
  font-weight: 500;
}

.typed::after {
  content: '|';
  animation: blink 1s step-end infinite;
  color: var(--accent);
}

.home-intro {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 2rem;
  max-width: 480px;
}

.home-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 0.65rem 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--accent);
  color: var(--bg);
  border-radius: 4px;
  border: 1px solid var(--accent);
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
  letter-spacing: 0.02em;
}

.btn-primary:hover {
  background: var(--accent-hl);
  color: var(--bg);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--glow);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 0.65rem 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  background: transparent;
  color: var(--accent);
  border-radius: 4px;
  border: 1px solid var(--accent);
  transition: background 0.2s, transform 0.2s;
  letter-spacing: 0.02em;
}

.btn-secondary:hover {
  background: var(--glow);
  color: var(--accent-hl);
  transform: translateY(-2px);
}

.home-meta {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.meta-item svg { flex-shrink: 0; color: var(--accent); }

/* ---------- Terminal Widget ---------- */
.home-terminal {
  background: var(--terminal-bg);
  border-radius: 8px;
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: 0 20px 60px var(--shadow);
  font-size: 0.82rem;
  line-height: 1.7;
  animation: fadeInRight 0.8s ease 0.2s both;
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(30px); }
  to   { opacity: 1; transform: translateX(0); }
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1rem;
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.07);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot.red    { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green  { background: #27c93f; }

.terminal-title {
  margin-left: auto;
  font-size: 0.72rem;
  color: rgba(255,255,255,0.3);
  font-family: var(--font-mono);
}

.terminal-body {
  padding: 1.2rem 1.4rem;
  color: var(--terminal-text);
  font-family: var(--font-mono);
}

.terminal-body p { white-space: pre-wrap; }

.t-comment { color: #6a9955; }
.t-key     { color: #9cdcfe; }
.t-val     { color: #ce9178; }
.t-fn      { color: #dcdcaa; }
.t-cursor  { margin-top: 0.25rem; }

/* ---------- About Section ---------- */
#about { background: var(--bg-alt); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.1rem;
  line-height: 1.85;
}

.about-text p:last-child { margin-bottom: 0; }

.about-text strong { color: var(--text); font-weight: 600; }

.detail-block { margin-bottom: 2.5rem; }
.detail-block:last-child { margin-bottom: 0; }

.detail-heading {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 1.25rem;
  letter-spacing: 0.05em;
}

.detail-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.detail-list li {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
}

.detail-icon {
  font-size: 0.7rem;
  color: var(--accent);
  margin-top: 0.3rem;
  flex-shrink: 0;
}

.detail-list li strong {
  display: block;
  font-size: 0.88rem;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.detail-list li p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.6;
}

.position-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.25rem;
  border-left: 3px solid var(--accent);
}

.pos-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.3rem;
}

.pos-org {
  font-size: 0.82rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.pos-loc {
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.pos-loc svg { flex-shrink: 0; margin-top: 2px; color: var(--accent); }

/* ---------- Contact Section ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 4rem;
  align-items: start;
}

.contact-intro {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 2.5rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: border-color 0.2s, background 0.2s;
  line-height: 1.5;
}

.contact-item:not(.no-link):hover {
  border-color: var(--accent);
  background: var(--glow);
  color: var(--text);
}

.ci-icon {
  flex-shrink: 0;
  color: var(--accent);
  margin-top: 1px;
}

.social-heading {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.social-icons {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
  transition: border-color 0.2s, color 0.2s, background 0.2s, transform 0.2s;
}

.social-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--glow);
  transform: translateY(-2px);
}

/* ---------- Contact Form ---------- */
.contact-form-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 24px var(--shadow);
}

.form-header {
  padding: 0.75rem 1.25rem;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

form {
  padding: 1.5rem 1.25rem;
}

/* Honeypot: visually hidden */
.honeypot {
  position: absolute;
  left: -9999px;
  top: -9999px;
  opacity: 0;
  pointer-events: none;
  tab-index: -1;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.form-input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.65rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  -webkit-appearance: none;
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--glow);
}

.form-input::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
}

.form-input.error {
  border-color: #ef4444;
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-error {
  display: block;
  font-size: 0.72rem;
  color: #ef4444;
  margin-top: 0.3rem;
  min-height: 1em;
}

.recaptcha-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Force reCAPTCHA to respect width */
.g-recaptcha {
  transform-origin: left top;
}

.btn-submit {
  width: 100%;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
  letter-spacing: 0.03em;
  position: relative;
  overflow: hidden;
}

.btn-submit:hover:not(:disabled) {
  background: var(--accent-hl);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px var(--glow);
}

.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-loading { display: none; align-items: center; justify-content: center; gap: 0.5rem; }
.btn-submit.loading .btn-text    { display: none; }
.btn-submit.loading .btn-loading { display: flex; }

.spinner {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.form-message {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 4px;
  font-size: 0.8rem;
  line-height: 1.6;
  display: none;
}

.form-message.success {
  display: block;
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.3);
  color: #16a34a;
}

.form-message.error {
  display: block;
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.3);
  color: #dc2626;
}

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  background: var(--bg-alt);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.footer-inner a {
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.footer-sub { opacity: 0.7; }

/* ---------- Animations ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .home-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .home-terminal { display: none; }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 640px) {
  section { padding: 4.5rem 1.25rem; }
  #home { padding-top: 4rem; }

  .nav-inner { padding: 0 1.25rem; }

  .nav-toggle { display: flex; }

  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 1rem;
    gap: 0.25rem;
  }

  .nav-links.open { display: flex; }

  .nav-link {
    display: block;
    padding: 0.65rem 1rem;
    width: 100%;
  }

  .home-name { font-size: 2.2rem; }

  .home-actions { flex-direction: column; }

  .btn-primary, .btn-secondary { text-align: center; justify-content: center; }

  .section-header h2 { font-size: 1.3rem; }

  .g-recaptcha {
    transform: scale(0.85);
    transform-origin: left top;
  }
}

@media (max-width: 400px) {
  .g-recaptcha {
    transform: scale(0.75);
    transform-origin: left top;
  }
}