/* ============================================================
   TEAM SECTION — styles.css
   Design token system + component styles
   Author: Corporate Team Template
   ============================================================

   TABLE OF CONTENTS
   1. CSS Custom Properties (design tokens)
   2. Reset & base
   3. Utilities
   4. Section shell (.team)
   5. Hero strip (.team__hero)
   6. Controls / filter bar (.team__controls)
   7. Grid (.team__grid)
   8. Team card (.team-card)
   9. Modal (.modal)
  10. Responsive breakpoints
  11. Reduced-motion overrides
   ============================================================ */


/* ── 1. DESIGN TOKENS ───────────────────────────────────────
   Change here; cascade everywhere.                          */
:root {
  /* Palette */
  --color-bg:           #F7F8FC;        /* page background */
  --color-surface:      #FFFFFF;        /* card / modal surface */
  --color-primary:      #1A2744;        /* deep navy — headings, CTAs */
  --color-secondary:    #3B5BDB;        /* vivid indigo — links, accent */
  --color-accent:       #6EE7C7;        /* soft mint — badge highlight */
  --color-text:         #1E2535;        /* body copy */
  --color-muted:        #6B7280;        /* subtitles, helper text */
  --color-border:       #E4E8F0;        /* card borders, dividers */

  /* Hero gradient: navy → indigo */
  --gradient-hero: linear-gradient(135deg, #1A2744 0%, #2B4ACB 60%, #4F6EF7 100%);

  /* Typography */
  --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-size-xs:   0.75rem;    /* 12px — labels, fine print */
  --font-size-sm:   0.875rem;   /* 14px — badges, captions */
  --font-size-base: 1rem;       /* 16px — body */
  --font-size-lg:   1.125rem;   /* 18px — card name */
  --font-size-xl:   1.375rem;   /* 22px — section subline */
  --font-size-2xl:  2rem;       /* 32px — H2 equivalent */
  --font-size-3xl:  3rem;       /* 48px — H1 hero */

  /* Spacing (8px baseline scale) */
  --space-1:  0.25rem;  /*  4px */
  --space-2:  0.5rem;   /*  8px */
  --space-3:  0.75rem;  /* 12px */
  --space-4:  1rem;     /* 16px */
  --space-5:  1.25rem;  /* 20px */
  --space-6:  1.5rem;   /* 24px */
  --space-8:  2rem;     /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */

  /* Layout */
  --container-max: 1200px;
  --gutter: var(--space-6);

  /* Radii */
  --radius-sm:   0.375rem;  /*  6px */
  --radius-md:   0.75rem;   /* 12px */
  --radius-lg:   1rem;      /* 16px */
  --radius-full: 9999px;

  /* Shadows */
  --shadow-card:   0 2px 8px rgba(26,39,68,.06), 0 0 0 1px rgba(26,39,68,.05);
  --shadow-hover:  0 12px 32px rgba(26,39,68,.14), 0 2px 8px rgba(26,39,68,.08);
  --shadow-modal:  0 24px 64px rgba(26,39,68,.24);

  /* Transitions */
  --transition-base:   200ms ease;
  --transition-bounce: 260ms cubic-bezier(.34,1.56,.64,1);
}


/* ── 2. RESET & BASE ────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
ul  { list-style: none; }
button { cursor: pointer; font: inherit; }


/* ── 3. UTILITIES ────────────────────────────────────────── */

/* Screen-reader-only: hide visually, keep for assistive tech */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* Reusable max-width wrapper */
.team__container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}


/* ── 4. SECTION SHELL ───────────────────────────────────── */
.team {
  background: var(--color-bg);
  padding-block-end: var(--space-20);
}


/* ── 5. HERO STRIP ──────────────────────────────────────── */
.team__hero {
  background: var(--gradient-hero);
  padding-block: var(--space-20) var(--space-16);
  position: relative;
  overflow: hidden;
}

/* Decorative ring — pure CSS, no image needed */
.team__hero::after {
  content: '';
  position: absolute;
  inset-block-start: -80px;
  inset-inline-end: -120px;
  width: 480px; height: 480px;
  border-radius: var(--radius-full);
  border: 80px solid rgba(255,255,255,.05);
  pointer-events: none;
}

.team__eyebrow {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-block-end: var(--space-4);
}

/* H1 / hero heading */
.team__heading {
  font-size: clamp(var(--font-size-2xl), 5vw, var(--font-size-3xl));
  font-weight: 700;
  line-height: 1.1;
  color: #fff;
  max-width: 16ch;
  margin-block-end: var(--space-5);
}

.team__subline {
  font-size: var(--font-size-xl);
  font-weight: 400;
  color: rgba(255,255,255,.72);
  max-width: 48ch;
  line-height: 1.6;
}


/* ── 6. FILTER BAR ──────────────────────────────────────── */
.team__controls {
  background: var(--color-surface);
  border-block-end: 1px solid var(--color-border);
  padding-block: var(--space-5);
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 1px 4px rgba(26,39,68,.06);
}

.team__controls .team__container {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}

/* Search input */
.team__search-wrap { flex: 1 1 240px; }

.team__search {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  background: var(--color-bg);
  outline: none;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.team__search:focus {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(59,91,219,.18);
}

/* Chip group */
.team__chips {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.team__chip {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-border);
  background: transparent;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-muted);
  transition: background var(--transition-base),
              color var(--transition-base),
              border-color var(--transition-base);
}

.team__chip:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

/* Active chip state — toggled via JS + aria-pressed */
.team__chip--active,
.team__chip[aria-pressed="true"] {
  background: var(--color-secondary);
  border-color: var(--color-secondary);
  color: #fff;
}

/* Visible keyboard focus for chips */
.team__chip:focus-visible {
  outline: 3px solid var(--color-secondary);
  outline-offset: 2px;
}

/* Empty state */
.team__empty {
  text-align: center;
  color: var(--color-muted);
  font-size: var(--font-size-lg);
  padding-block: var(--space-16);
}


/* ── 7. GRID ────────────────────────────────────────────── */
.team__grid {
  display: grid;
  /* Desktop: 4 columns */
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  padding-block-start: var(--space-12);
}


/* ── 8. TEAM CARD ───────────────────────────────────────── */
.team-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  /* Lift on hover; driven by transform for GPU compositing */
  transition: transform var(--transition-bounce),
              box-shadow var(--transition-base);
}

.team-card:hover,
.team-card:focus-within {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

/* ── Photo area ── */
.team-card__photo-wrap {
  position: relative;
  aspect-ratio: 1 / 1;   /* square */
  overflow: hidden;
}

.team-card__photo {
  width: 100%; height: 100%;
  object-fit: cover;          /* crop to fill square */
  object-position: top center;
  transition: transform 380ms ease;
}

.team-card:hover .team-card__photo {
  transform: scale(1.04);
}

/* Hover overlay — bio reveal */
.team-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(26,39,68,.88) 100%);
  display: flex;
  align-items: flex-end;
  padding: var(--space-5);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.team-card:hover .team-card__overlay,
.team-card:focus-within .team-card__overlay {
  opacity: 1;
}

.team-card__bio-short {
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,.90);
  line-height: 1.5;
}

/* ── Card body ── */
.team-card__body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.team-card__name {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.team-card__role {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  font-weight: 500;
}

/* Skill badges list */
.team-card__badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-block: var(--space-1);
}

/* Badge entrance animation — staggered via nth-child */
.team-card__badge {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-secondary);
  background: rgba(59,91,219,.08);
  border: 1px solid rgba(59,91,219,.18);
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-3);
  opacity: 0;
  transform: translateY(4px);
  animation: badge-enter 300ms ease forwards;
}

.team-card__badge:nth-child(1) { animation-delay: 60ms; }
.team-card__badge:nth-child(2) { animation-delay: 120ms; }
.team-card__badge:nth-child(3) { animation-delay: 180ms; }

@keyframes badge-enter {
  to { opacity: 1; transform: translateY(0); }
}

.team-card__tagline {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  font-style: italic;
  line-height: 1.5;
  margin-block-start: var(--space-1);
}

/* CTA button */
.team-card__cta {
  margin-block-start: var(--space-3);
  align-self: flex-start;
  padding: var(--space-2) var(--space-5);
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: .02em;
  transition: background var(--transition-base), transform var(--transition-base);
}

.team-card__cta:hover { background: var(--color-secondary); }
.team-card__cta:active { transform: scale(.97); }

/* Visible focus: keyboard navigation */
.team-card__cta:focus-visible {
  outline: 3px solid var(--color-secondary);
  outline-offset: 3px;
}


/* ── 9. MODAL ───────────────────────────────────────────── */

/* Backdrop */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}

/* [hidden] hides the whole modal container; JS removes it */
.modal[hidden] { display: none; }

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15,23,42,.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

/* Modal panel */
.modal__panel {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  width: 100%;
  max-width: 640px;
  max-height: 90vh;
  overflow-y: auto;
  padding: var(--space-8);
  animation: modal-in 220ms cubic-bezier(.34,1.2,.64,1) forwards;
}

@keyframes modal-in {
  from { opacity: 0; transform: scale(.95) translateY(12px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

/* Close button */
.modal__close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 36px; height: 36px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-border);
  background: transparent;
  font-size: 1rem;
  color: var(--color-muted);
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition-base), color var(--transition-base);
}

.modal__close:hover { background: var(--color-bg); color: var(--color-primary); }
.modal__close:focus-visible {
  outline: 3px solid var(--color-secondary);
  outline-offset: 2px;
}

/* Header row: photo + name + role + LinkedIn */
.modal__inner {
  display: flex;
  gap: var(--space-6);
  align-items: flex-start;
  margin-block-end: var(--space-6);
}

.modal__photo {
  width: 96px; height: 96px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  object-position: top center;
  flex-shrink: 0;
  box-shadow: var(--shadow-card);
}

.modal__name {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.15;
}

.modal__role {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  margin-block: var(--space-1) var(--space-3);
}

.modal__linkedin {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition-base);
}

.modal__linkedin:hover { color: var(--color-primary); }
.modal__linkedin:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.modal__bio {
  font-size: var(--font-size-base);
  color: var(--color-text);
  line-height: 1.7;
  margin-block-end: var(--space-6);
}

.modal__section-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-block-end: var(--space-3);
}

.modal__project-list {
  list-style: disc;
  padding-inline-start: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-block-end: var(--space-6);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  line-height: 1.6;
}

/* Video placeholder */
.modal__video-wrap { margin-block-start: var(--space-2); }

.modal__video {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}

.modal__video-note {
  font-size: var(--font-size-xs);
  color: var(--color-muted);
  margin-block-start: var(--space-2);
  font-style: italic;
}


/* ── 10. RESPONSIVE BREAKPOINTS ──────────────────────────── */

/* Tablet: 2 columns */
@media (max-width: 1024px) {
  .team__grid { grid-template-columns: repeat(2, 1fr); }
}

/* Large tablet: control bar stacks */
@media (max-width: 768px) {
  .team__controls .team__container {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-4);
  }

  .team__search-wrap { flex: 1 1 auto; }

  .modal__panel { padding: var(--space-6); }
  .modal__inner { flex-direction: column; gap: var(--space-4); }
  .modal__name  { font-size: var(--font-size-xl); }
}

/* Mobile: 1 column */
@media (max-width: 540px) {
  .team__grid { grid-template-columns: 1fr; }
  .team__heading { font-size: var(--font-size-2xl); }
  .team__subline { font-size: var(--font-size-base); }
  .modal { padding: var(--space-4); }
}


/* ── 11. REDUCED-MOTION OVERRIDES ────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .team-card:hover,
  .team-card:focus-within {
    transform: none; /* no lift for motion-sensitive users */
  }
}