:root{
  /* Brand palette: Deep Navy + Electric Teal */
  --navy-900:#0B1F3A;
  --navy-800:#132B4C;
  --navy-700:#1C3A63;

  --accent:#1FD1C2;
  --accent-dark:#12B3A5;

  --bg:#F7F9FC;
  --panel:#FFFFFF;

  --text:#0E1726;
  --muted:#5B6B82;

  --border:#E2E8F0;
  --shadow: 0 10px 28px rgba(11,31,58,.12);

  --radius: 14px;
  --max: 1120px;
}

*{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }

body{
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

/* Links */
a{ color: inherit; text-decoration:none; }
a:hover{ color: var(--accent-dark); }

/* Layout container */
.container{
  width:min(var(--max), calc(100% - 2rem));
  margin:0 auto;
}

/* Header */
.site-header{
  background: var(--navy-900);
  color:#fff;
  border-bottom: 3px solid var(--accent);
  position: sticky;
  top:0;
  z-index: 30;
}

.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 1.25rem;
  padding: 1rem 0;
  flex-wrap: wrap;
}

.brand{
  font-weight: 750;
  letter-spacing: -0.4px;
  font-size: 1.15rem;
}

.nav{
  display:flex;
  align-items:center;
  gap: 1rem;
  flex-wrap: wrap;
}

.nav a{
  color: rgba(255,255,255,.88);
  font-weight: 550;
}

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

/* Buttons */
.btn,
.btn-primary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding: .75rem 1.25rem;
  border-radius: 10px;
  border: 1px solid transparent;
  background: var(--accent);
  color: var(--navy-900);
  font-weight: 650;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(31,209,194,.18);
}

.btn:hover,
.btn-primary:hover{
  background: var(--accent-dark);
}

.btn-small{
  padding: .55rem .95rem;
  border-radius: 10px;
  box-shadow: none;
}

.btn-ghost{
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,.25);
  box-shadow: none;
}

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

/* Typography */
h1,h2,h3{
  letter-spacing: -0.6px;
  line-height: 1.2;
  margin:0 0 .6rem;
}

p{ margin:0 0 1rem; }

.muted{ color: var(--muted); }

/* Sections */
.section{
  padding: 3.5rem 0;
}

.section-alt{
  padding: 3.5rem 0;
  background: var(--panel);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* About full-width */
.about-wide{
  background:
    radial-gradient(900px 420px at 15% 20%, rgba(31,209,194,.18), transparent 60%),
    radial-gradient(900px 520px at 85% 0%, rgba(19,43,76,.25), transparent 55%),
    linear-gradient(180deg, #ffffff, #f4f8ff);
  border-bottom: 1px solid var(--border);
}

.about-inner{
  padding: 4.5rem 0 4rem;
  max-width: 980px; /* allows it to feel wide without being hard to read */
}

.about-inner h1{
  font-size: clamp(2rem, 5vw, 3rem);
  color: var(--navy-900);
  margin-bottom: 1.75rem;
}

.about-text{
  font-size: 1.05rem;
  line-height: 1.85;
  margin: 0 0 1.75rem;
  color: var(--text);
}

/* Spacing between About and Projects */
#projects{
  margin-top: 5rem;
}

/* Section headings */
.section-head{
  margin-bottom: 1.35rem;
}

.section-head h2{
  font-size: 2.5rem; /* larger Projects + Future Projects */
  color: var(--navy-900);
}

.section-head h3{
  font-size: 1.55rem;
  color: var(--navy-900);
  margin-top: .35rem;
}

.section-head p{
  max-width: 90ch;
  color: var(--muted);
  margin: 0;
}

/* Increase gap between Projects and Future Projects */
.future-section{
  margin-top: 4.25rem;
}

/* Cards / grids */
.grid{
  margin-top: 1.6rem;
  display:grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card{
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: var(--shadow);
  transition: transform .15s ease, border-color .15s ease;
}

.card:hover{
  transform: translateY(-3px);
  border-color: rgba(31,209,194,.75);
}

.card h3{
  margin:0 0 .5rem;
  font-size: 1.2rem;
  color: var(--navy-900);
}

.card p{
  margin:0;
  color: var(--muted);
}

/* Divider */
.divider{
  height: 1px;
  background: var(--border);
  margin: 3rem 0;
}

/* CTA block */
.cta{
  display:flex;
  justify-content: space-between;
  align-items:center;
  gap: 1rem;
  flex-wrap: wrap;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem;
  box-shadow: var(--shadow);
}

.cta h2{
  font-size: 1.7rem;
  color: var(--navy-900);
}

.cta p{ color: var(--muted); margin:0; }

/* Footer */
.site-footer{
  background: var(--navy-900);
  color: rgba(255,255,255,.88);
  border-top: 3px solid var(--accent);
  padding: 1.6rem 0;
  margin-top: 2rem;
}

.footer-inner{
  display:flex;
  justify-content: space-between;
  align-items:center;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-footer a{ color: rgba(255,255,255,.88); }
.site-footer a:hover{ color: var(--accent); }

/* Form helper */
.form-row input,
.form-row textarea{
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
}

.form-row input:focus,
.form-row textarea:focus{
  border-color: rgba(31,209,194,.85);
  box-shadow: 0 0 0 4px rgba(31,209,194,.18);
}