/* ══════════════════════════════════════════════
   BalakrishnanS Portfolio — Stylesheet
   Theme: Dark editorial with amber accents
   ══════════════════════════════════════════════ */

/* ─── CSS Custom Properties ─────────────────── */
:root {
  --accent: #e8a020;
  --accent-dim: #b87a10;
  --accent-glow: rgba(232, 160, 32, 0.18);
  --radius: 12px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'DM Mono', monospace;
}

/* Dark theme (default) */
[data-theme="dark"] {
  --bg: #0c0c0e;
  --bg-alt: #111114;
  --surface: #18181c;
  --surface-2: #222228;
  --border: rgba(255, 255, 255, 0.08);
  --text: #f0ede8;
  --text-secondary: #888;
  --text-dim: #555;
  --header-bg: rgba(12, 12, 14, 0.85);
}

/* Light theme */
[data-theme="light"] {
  --bg: #fafaf8;
  --bg-alt: #f2f0eb;
  --surface: #ffffff;
  --surface-2: #f5f3ee;
  --border: rgba(0, 0, 0, 0.09);
  --text: #1a1a1a;
  --text-secondary: #666;
  --text-dim: #aaa;
  --header-bg: rgba(250, 250, 248, 0.85);
}

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

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

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
  cursor: none;
}

/* ─── Custom Cursor ──────────────────────────── */
.cursor {
  width: 36px; height: 36px;
  border: 1.5px solid var(--accent);
  border-radius: 50%;
  position: fixed;
  top: 0; left: 0;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: transform 0.15s ease, width 0.2s, height 0.2s, opacity 0.2s, border-color 0.2s;
  opacity: 0;
}

.cursor-dot {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  position: fixed;
  top: 0; left: 0;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: transform 0.05s ease;
  opacity: 0;
}

body:hover .cursor,
body:hover .cursor-dot { opacity: 1; }

.cursor.hovering { width: 56px; height: 56px; background: var(--accent-glow); }

/* ─── Typography ─────────────────────────────── */
h1, h2, h3 { font-family: var(--font-display); font-weight: 700; line-height: 1.15; }
h1 { font-size: clamp(3rem, 8vw, 6.5rem); }
h2 { font-size: clamp(2rem, 5vw, 3.2rem); }
h3 { font-size: 1.3rem; }
em { color: var(--accent); font-style: italic; }
p { color: var(--text-secondary); max-width: 60ch; }
a { text-decoration: none; color: inherit; }

/* ─── Layout Utilities ───────────────────────── */
.container { max-width: 1140px; margin: 0 auto; padding: 0 2rem; }

.section { padding: 7rem 0; }
.section-alt { background: var(--bg-alt); }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.section-title {
  margin-bottom: 3rem;
  color: var(--text);
}

/* ─── Scroll Reveal ──────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ─── Buttons ────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.75rem 1.6rem;
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  border: 1.5px solid transparent;
  cursor: none;
  transition: all var(--transition);
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--accent);
  color: #0c0c0e;
  border-color: var(--accent);
}
.btn-primary:hover { background: #ffb830; border-color: #ffb830; transform: translateY(-2px); box-shadow: 0 8px 28px rgba(232,160,32,0.35); }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

.btn-sm { padding: 0.5rem 1.1rem; font-size: 0.82rem; }
.btn-full { width: 100%; justify-content: center; }

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

.header.scrolled { box-shadow: 0 4px 40px rgba(0,0,0,0.15); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--text);
  letter-spacing: -0.02em;
}
.logo span { color: var(--accent); }

.nav { display: flex; gap: 2rem; }

.nav-link {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  position: relative;
  transition: color var(--transition);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1.5px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav-link:hover { color: var(--text); }
.nav-link:hover::after { width: 100%; }

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

.theme-toggle {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--text);
  font-size: 1.1rem;
  cursor: none;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: none;
  padding: 6px;
}
.menu-toggle span {
  display: block;
  width: 22px; height: 1.5px;
  background: var(--text);
  transition: all var(--transition);
}

/* ─── Hero ───────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 8rem 0 4rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.5;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(232,160,32,0.12) 0%, transparent 70%);
  top: -200px; right: -100px;
  animation: orbFloat 12s ease-in-out infinite alternate;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(232,160,32,0.06) 0%, transparent 70%);
  bottom: 0; left: -100px;
  animation: orbFloat 16s ease-in-out infinite alternate-reverse;
}

@keyframes orbFloat {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(30px, 20px) scale(1.08); }
}

.hero-content { position: relative; z-index: 1; }

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  max-width: none;
}

.hero-title {
  color: var(--text);
  margin-bottom: 1.5rem;
  line-height: 1.05;
}

.hero-typing {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: none;
}

.typing-target { color: var(--accent); font-weight: 500; }
.cursor-blink {
  color: var(--accent);
  animation: blink 0.9s step-end infinite;
  font-weight: 300;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

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

.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px; height: 48px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(0.8); }
  50%       { opacity: 1;   transform: scaleY(1); }
}

/* ─── About ──────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 5rem;
  align-items: center;
}

.about-photo { display: flex; flex-direction: column; align-items: center; gap: 1.5rem; }

.photo-frame {
  position: relative;
  width: 260px; height: 260px;
}

.photo-placeholder {
  width: 100%; height: 100%;
  border-radius: 20px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 900;
  color: var(--accent);
  position: relative;
  overflow: hidden;
}

/* Replace photo-placeholder with an <img> if you have a photo:
   .photo-placeholder img { width:100%; height:100%; object-fit:cover; border-radius:20px; } */

.photo-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(232,160,32,0.12), transparent 60%);
}

.photo-ring {
  position: absolute;
  inset: -16px;
  border-radius: 28px;
  border: 1.5px dashed rgba(232,160,32,0.3);
  animation: spin 20s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.about-tag {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.4rem 1rem;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--accent);
}

.about-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 2.5rem;
}

.stat { display: flex; flex-direction: column; gap: 2px; }
.stat-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
}
.stat-label {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

/* ─── Skills ─────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.skill-card:hover { border-color: rgba(232,160,32,0.3); transform: translateY(-4px); box-shadow: 0 16px 48px rgba(0,0,0,0.12); }
.skill-card:hover::before { transform: scaleX(1); }

.skill-card-icon {
  font-size: 1.8rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
  line-height: 1;
}

.skill-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--text);
  margin-bottom: 1rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.skill-tags span {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

.skill-bar-group { display: flex; flex-direction: column; gap: 0.75rem; }

.skill-bar-row {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.skill-bar-row > span { font-size: 0.78rem; color: var(--text-dim); font-family: var(--font-mono); }

.skill-bar {
  height: 4px;
  background: var(--surface-2);
  border-radius: 100px;
  overflow: hidden;
}

.skill-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-dim), var(--accent));
  border-radius: 100px;
  width: 0%;
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Projects ───────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.project-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-dim), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.project-card:hover { border-color: rgba(232,160,32,0.25); transform: translateY(-6px); box-shadow: 0 20px 60px rgba(0,0,0,0.15); }
.project-card:hover::after { transform: scaleX(1); }

.project-num {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--border);
  line-height: 1;
  position: absolute;
  top: 1rem; right: 1.5rem;
}

.project-type {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.project-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--text);
  margin: 0;
}

.project-desc { font-size: 0.9rem; color: var(--text-secondary); flex: 1; }

.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.project-stack span {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.2rem 0.6rem;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
}

.project-links { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 0.5rem; }

/* ─── Contact ────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 5rem;
  align-items: start;
}

.contact-left p {
  margin-bottom: 2.5rem;
}

.contact-links { display: flex; flex-direction: column; gap: 0.75rem; }

.contact-social {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: all var(--transition);
}

.contact-social:hover { border-color: var(--accent); color: var(--text); transform: translateX(6px); }

.social-icon {
  width: 32px; height: 32px;
  background: var(--surface-2);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  flex-shrink: 0;
}

.social-arrow { margin-left: auto; color: var(--text-dim); transition: transform var(--transition); }
.contact-social:hover .social-arrow { transform: translate(4px,-4px); color: var(--accent); }

/* Contact Form */
.contact-form {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group { display: flex; flex-direction: column; gap: 0.5rem; }
.form-group label { font-size: 0.82rem; color: var(--text-secondary); font-family: var(--font-mono); letter-spacing: 0.05em; }

.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-dim); }

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(232,160,32,0.1);
}

.btn-arrow { transition: transform var(--transition); }
.btn-primary:hover .btn-arrow { transform: translateX(5px); }

.form-success {
  display: none;
  background: rgba(34,180,100,0.12);
  border: 1px solid rgba(34,180,100,0.3);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  color: #4ade80;
  text-align: center;
}

/* ─── Footer ─────────────────────────────────── */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-left { display: flex; align-items: center; gap: 1rem; }
.footer-left p { font-size: 0.82rem; color: var(--text-dim); margin: 0; max-width: none; }

.footer-right { display: flex; flex-direction: column; align-items: flex-end; gap: 0.5rem; }

.copyright { font-size: 0.78rem; color: var(--text-dim); max-width: none; }

.footer-socials { display: flex; gap: 1.25rem; }
.footer-socials a {
  font-size: 0.82rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  transition: color var(--transition);
}
.footer-socials a:hover { color: var(--accent); }

/* ─── Back to Top ────────────────────────────── */
.back-top {
  position: fixed;
  bottom: 2rem; right: 2rem;
  width: 44px; height: 44px;
  background: var(--accent);
  color: #0c0c0e;
  border: none;
  border-radius: 50%;
  font-size: 1rem;
  font-weight: 700;
  cursor: none;
  display: flex; align-items: center; justify-content: center;
  z-index: 99;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  pointer-events: none;
}

.back-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-top:hover { box-shadow: 0 6px 24px rgba(232,160,32,0.45); transform: translateY(-3px); }

/* ─── Responsive ─────────────────────────────── */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 3rem; text-align: center; }
  .about-photo { align-items: center; }
  .about-stats { justify-content: center; }
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
  .footer-right { align-items: flex-start; }
}

@media (max-width: 700px) {
  .nav { display: none; position: fixed; top: 64px; left: 0; right: 0; background: var(--header-bg); backdrop-filter: blur(16px); flex-direction: column; align-items: center; padding: 2rem; gap: 1.5rem; border-bottom: 1px solid var(--border); }
  .nav.open { display: flex; }
  .menu-toggle { display: flex; }
  .hero-cta { flex-direction: column; align-items: flex-start; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-right { align-items: flex-start; }
  .section { padding: 5rem 0; }
}

@media (max-width: 480px) {
  .container { padding: 0 1.25rem; }
  .about-stats { gap: 1.5rem; }
  .contact-form { padding: 1.5rem; }
}