/* ===========================
   Dark Data/ML Portfolio Theme
   =========================== */

:root {
  --bg: #020617;
  --bg-soft: #020617;
  --surface: #020617;
  --surface-soft: #02081b;
  --accent-purple: #a855f7;
  --accent-purple-soft: rgba(168, 85, 247, 0.15);
  --accent-red: #f97373;
  --text-main: #e5e7eb;
  --text-soft: #9ca3af;
  --border-subtle: #1f2937;
  --radius-lg: 14px;
  --radius-xl: 22px;
  --shadow-soft: 0 24px 60px rgba(15, 23, 42, 1);
  --shadow-card: 0 18px 45px rgba(15, 23, 42, 1);
}

/* Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.7;
  color: var(--text-main);
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, #1f2937 0, transparent 45%),
    radial-gradient(circle at bottom right, #111827 0, transparent 55%),
    #020617;
}

/* Layout helper */
.container {
  width: min(980px, 100% - 2.5rem);
  margin: 0 auto;
}

/* ===========================
   Header & Navigation
   =========================== */

header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 23, 42, 0.96);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(31, 41, 55, 0.9);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.9);
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0.1rem;
}

/* Logo / name (bigger) */
.logo {
  font-size: 1.4rem; /* bigger name */
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-purple);
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.logo::before {
  content: "HR";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.3rem;
  height: 2.3rem;
  border-radius: 999px;
  background: radial-gradient(circle at 20% 0%, #a855f7, #020617 70%);
  color: #f9fafb;
  font-size: 0.9rem;
  border: 1px solid rgba(148, 163, 184, 0.8);
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.9);
}

/* Nav */
nav {
  display: flex;
  gap: 1rem;
  font-size: 0.9rem;
}

nav a {
  position: relative;
  color: var(--text-soft);
  text-decoration: none;
  padding: 0.25rem 0.1rem;
  transition: color 0.18s ease, transform 0.18s ease;
}

nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.18rem;
  width: 0%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-red), var(--accent-purple));
  box-shadow: 0 0 10px rgba(248, 113, 113, 0.5);
  transition: width 0.2s ease;
}

nav a:hover {
  color: #f9fafb;
  transform: translateY(-1px);
}

nav a:hover::after {
  width: 100%;
}

/* Social icons */
.social-icons {
  display: flex;
  gap: 0.4rem;
}

.social-icons a {
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  background: #020617;
  border: 1px solid var(--border-subtle);
  color: var(--accent-purple);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.8);
  transition: transform 0.18s ease, box-shadow 0.18s ease,
    background 0.18s ease, color 0.18s ease;
}

.social-icons a:hover {
  transform: translateY(-2px) scale(1.04);
  background: linear-gradient(
    135deg,
    var(--accent-purple),
    var(--accent-red)
  );
  color: #ffffff;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 1);
}

/* Simple icon labels */
.social-icons .icon-gh::before {
  content: "GH";
  font-size: 0.7rem;
  font-weight: 600;
}
.social-icons .icon-li::before {
  content: "in";
  font-size: 0.8rem;
  font-weight: 700;
}
.social-icons .icon-mail::before {
  content: "✉";
  font-size: 0.9rem;
}

/* ===========================
   Hero
   =========================== */

.hero {
  padding: 3.3rem 0 2.8rem;
}

.hero .container {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

/* small pill label */
.hero-kicker {
  display: inline-flex;
  align-items: center;
  padding: 0.22rem 0.7rem;
  border-radius: 999px;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-purple);
  background: rgba(24, 24, 27, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.7);
}

/* BIG hero name */
.hero-name {
  font-size: clamp(2.4rem, 3.6vw, 3rem);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #f9fafb;
  text-shadow: 0 20px 40px rgba(0, 0, 0, 1);
}

.hero p {
  max-width: 36rem;
  color: var(--text-soft);
}

/* underline bar */
.hero-underline {
  width: 160px;
  height: 3px;
  margin-top: 1rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-red), var(--accent-purple));
  box-shadow: 0 0 18px rgba(248, 113, 113, 0.7);
}

/* ===========================
   Sections / Headings
   =========================== */

.section {
  padding: 2.6rem 0;
}

.section.alt {
  background: radial-gradient(circle at top left, #020617, #02081b 55%);
}

.section h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--accent-purple);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* offset for anchor scroll */
section[id] {
  scroll-margin-top: 4.5rem;
}

/* ===========================
   Cards / Project Blocks
   =========================== */

.project {
  position: relative;
  background: radial-gradient(circle at top, #020617, #020617 70%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  padding: 1.1rem 1.2rem;
  margin-bottom: 1.1rem;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform 0.18s ease, box-shadow 0.18s ease,
    border-color 0.18s ease, background 0.18s ease;
}

.project::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at top right,
    rgba(248, 113, 113, 0.18),
    transparent 55%
  );
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
}

.project:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 1);
  border-color: rgba(248, 113, 113, 0.7);
  background: radial-gradient(circle at top, #020617, #020617 60%);
}

.project:hover::before {
  opacity: 1;
}

.project h3 {
  margin-bottom: 0.4rem;
  font-size: 1.05rem;
  color: var(--accent-purple);
}

.project p {
  font-size: 0.94rem;
  color: var(--text-soft);
}

.project p + p {
  margin-top: 0.35rem;
}

.project strong {
  color: var(--accent-red);
}

/* ===========================
   Contact Section & Form
   =========================== */

.section-intro {
  margin-bottom: 1rem;
  color: var(--text-soft);
}

.contact-card {
  background: #020617;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-subtle);
  padding: 1.6rem 1.5rem;
  box-shadow: var(--shadow-soft);
  max-width: 640px;
}

/* form layout */
.contact-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem 1rem;
}

.contact-form .full-width {
  grid-column: 1 / -1;
}

.label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-soft);
  margin-bottom: 0.15rem;
  display: inline-block;
}

input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  padding: 0.55rem 0.7rem;
  font-size: 0.92rem;
  font-family: inherit;
  color: var(--text-main);
  background-color: #020617;
  transition: border-color 0.18s ease, box-shadow 0.18s ease,
    transform 0.1s ease, background 0.18s ease;
}

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

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent-purple);
  box-shadow: 0 0 0 2px rgba(168, 85, 247, 0.4);
  transform: translateY(-1px);
  background: #020617;
}

/* submit button */
.contact-submit {
  margin-top: 0.4rem;
  display: flex;
  justify-content: flex-end;
}

button[type="submit"] {
  border: none;
  cursor: pointer;
  padding: 0.55rem 1.4rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
  color: #ffffff;
  background: linear-gradient(
    135deg,
    var(--accent-purple),
    var(--accent-red)
  );
  box-shadow: 0 16px 34px rgba(248, 113, 113, 0.6);
  transition: transform 0.15s ease, box-shadow 0.15s ease,
    filter 0.15s ease;
}

button[type="submit"]:hover {
  transform: translateY(-1px);
  box-shadow: 0 20px 40px rgba(248, 113, 113, 0.7);
  filter: brightness(1.05);
}

button[type="submit"]:active {
  transform: translateY(0);
  box-shadow: 0 10px 22px rgba(248, 113, 113, 0.5);
}

.contact-note {
  margin-top: 0.7rem;
  font-size: 0.78rem;
  color: var(--text-soft);
}

/* ===========================
   Footer
   =========================== */

footer {
  background: #020617;
  border-top: 1px solid var(--border-subtle);
  padding: 1rem 0 1.4rem;
  margin-top: 2.2rem;
}

footer .container {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-soft);
}

/* ===========================
   Animation: fade up
   =========================== */

.hero,
.section {
  animation: fadeUp 0.6s ease-out;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===========================
   Responsive Tweaks
   =========================== */

@media (max-width: 900px) {
  header .container {
    gap: 0.7rem;
  }
}

@media (max-width: 780px) {
  header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  nav {
    flex-wrap: wrap;
  }

  .hero {
    padding-top: 2.9rem;
  }

  .contact-card {
    padding: 1.3rem 1.1rem;
  }

  .contact-form {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .logo {
    font-size: 1.2rem;
  }

  nav {
    font-size: 0.82rem;
  }

  .project {
    padding: 1rem;
  }
}