/* ═══════════════════════════════════════════════════════════════════
   SumanSahu Portfolio — Main Stylesheet
   ═══════════════════════════════════════════════════════════════════ */

/* ─── 1. CSS Custom Properties ─────────────────────────────────────── */
:root {
  /* Background layers */
  --clr-bg:        #ffffff;
  --clr-surface:   #f5f5fb;
  --clr-card:      #ffffff;
  --clr-elevated:  #ededf5;
  --clr-border:    rgba(0,0,0,0.08);

  /* Brand palette — warm-to-cool spectrum */
  --clr-primary:        #9f3afd;  /* mid purple        */
  --clr-primary-light:  #BD5EDA;  /* soft violet        */
  --clr-primary-dark:   #8090DD;  /* periwinkle         */
  --clr-secondary:      #FA3DC7;  /* hot pink           */
  --clr-accent:         #46C0DF;  /* cyan               */
  --clr-warm:           #FEDC31;  /* sunflower yellow   */

  /* Text */
  --clr-text:       #18182a;
  --clr-text-muted: #5c5c7a;
  --clr-text-dim:   #9898b8;

  /* Gradients */
  --grad-primary:   linear-gradient(135deg, #FA3DC7 0%, #A870DB 50%, #46C0DF 100%);
  --grad-warm:      linear-gradient(90deg,  #FEDC31 0%, #FC9574 50%, #FA3DC7 100%);
  --grad-hero:      radial-gradient(ellipse 80% 60% at 65% 50%, rgba(250,61,199,.06) 0%, rgba(168,112,219,.04) 50%, transparent 70%);
  --grad-glow:      radial-gradient(circle at center, rgba(168,112,219,.22) 0%, transparent 70%);

  /* Typography */
  --font-sans:    'Lato', system-ui, -apple-system, sans-serif;
  --font-display: 'Cal Sans', 'Lato', sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing scale */
  --sp-xs:  0.25rem;
  --sp-sm:  0.5rem;
  --sp-md:  1rem;
  --sp-lg:  1.5rem;
  --sp-xl:  2.5rem;
  --sp-2xl: 4rem;
  --sp-3xl: 6rem;

  /* Layout */
  --container:    1200px;
  --nav-h:        72px;

  /* Radius */
  --r-sm:   6px;
  --r-md:   12px;
  --r-lg:   20px;
  --r-xl:   32px;
  --r-full: 9999px;

  /* Shadows (tuned for light backgrounds) */
  --shadow-sm:   0 1px 4px rgba(0,0,0,.07), 0 2px 8px rgba(0,0,0,.04);
  --shadow-md:   0 4px 20px rgba(0,0,0,.09), 0 2px 6px rgba(0,0,0,.05);
  --shadow-lg:   0 8px 40px rgba(0,0,0,.12), 0 4px 12px rgba(0,0,0,.06);
  --shadow-glow: 0 0 40px rgba(168,112,219,.25);

  /* Motion */
  --ease:     cubic-bezier(.4,0,.2,1);
  --ease-out: cubic-bezier(0,.55,.45,1);
  --dur-fast: 150ms;
  --dur:      300ms;
  --dur-slow: 500ms;

  /* Nav */
  scroll-padding-top: var(--nav-h);
}

/* ─── 2. Reset ──────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0px; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scrollbar-gutter: stable; }
body {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--clr-text);
  background-color: var(--clr-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
ul, ol { list-style: none; }
input, textarea, select { font-family: inherit; }

/* ─── 3. Typography ─────────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600; /* Cal Sans only ships SemiBold */
  line-height: 1.2;
  color: var(--clr-text);
}
h1 { font-size: clamp(2.2rem, 5vw, 4rem); }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
h4 { font-size: 1.1rem; }
p  { color: var(--clr-text-muted); }

.body-text { font-size: 1.0625rem; line-height: 1.8; }

/* Gradient Text */
.gradient-text {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─── 4. Layout Utilities ────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-lg);
}

.section {
  padding-block: var(--sp-3xl);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--sp-2xl);
}

.section-eyebrow {
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--clr-primary-light);
  margin-bottom: var(--sp-sm);
}

.section-title  { margin-bottom: var(--sp-sm); }
.section-subtitle { font-size: 1.0625rem; }

.section-footer {
  text-align: center;
  margin-top: var(--sp-2xl);
}

/* Grid helpers */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--sp-lg);
}

/* ─── 5. Buttons ─────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .875rem 2rem;
  border-radius: var(--r-full);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1;
  transition: all var(--dur) var(--ease);
  white-space: nowrap;
  cursor: pointer;
}

.btn-primary {
  background: var(--clr-primary);
  color: #fff;
  border: 2px solid var(--clr-primary);
  box-shadow: 0 4px 18px rgba(168,112,219,.30);
}
.btn-primary:hover {
  background: var(--clr-primary-dark);
  border-color: var(--clr-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(168,112,219,.42);
}

.btn-outline {
  background: transparent;
  color: var(--clr-text);
  border: 2px solid var(--clr-border);
}
.btn-outline:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  background: rgba(168,112,219,.06);
}

.btn-ghost {
  background: rgba(0,0,0,.04);
  color: var(--clr-text);
}
.btn-ghost:hover { background: rgba(0,0,0,.08); }

.btn-sm  { padding: .5rem 1.125rem; font-size: .875rem; }
.btn-lg  { padding: 1rem 2rem;      font-size: 1.0625rem; }
.btn-md  { padding: 0.8rem 2rem;      font-size: 1.0625rem; }

/* ─── 6. Badge ───────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: .25rem .75rem;
  border-radius: var(--r-full);
  font-size: .75rem;
  font-weight: 600;
  background: rgba(168,112,219,.1);
  color: var(--clr-primary);
  border: 1px solid rgba(168,112,219,.2);
}