/* styles.css */

/* ==============================
   ROOT VARIABLES
   ============================== */
:root {
  --color-primary:    #2c3e50;
  --color-accent:     #74c5b6;
  --color-bg-light:   #ffffff;
  --color-bg-dark:    #1a252f;
  --color-text-dark:  #333333;
  --color-text-light: #f5f5f5;

  --navbar-height:    70px;
  --nav-gap:          1.5rem;
  --dropdown-width:   12rem;

  --transition-fast:  0.3s ease;
  --transition-med:   0.5s ease;
}

/* ==============================
   1) GLOBAL STYLES
   ============================== */
body {
  margin: 0;
  padding-top: var(--navbar-height);
  font-family: 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--color-text-dark);
  background-color: #f7f9fc;
}

/* ==============================
   2) NAVBAR LAYOUT
   ============================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--navbar-height);
  background: var(--color-bg-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--nav-gap);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  z-index: 1000;
}

/* Logo */
.logo img {
  height: 40px;
  transition: transform var(--transition-fast);
}
.logo img:hover {
  transform: scale(1.1);
}

/* Primary nav links */
.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--nav-gap);
  margin: 0;
  padding: 0;
}
.nav-links li {
  position: relative;
}
.nav-links a {
  display: inline-block;
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: 0.25rem;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.nav-links a:hover,
.nav-links a:focus {
  background: var(--color-accent);
  color: var(--color-bg-light);
}
.nav-links a.active {
  background: var(--color-primary);
  color: var(--color-bg-light);
}

/* Dropdowns */
.has-dropdown > a::after {
  content: "";
  display: inline-block;
  margin-left: 0.25rem;
  border: solid var(--color-primary);
  border-width: 0 1px 1px 0;
  padding: 3px;
  transform: rotate(45deg);
  transition: transform var(--transition-fast);
}
.dropdown {
  position: absolute;
  top: 100%; left: 0;
  background: var(--color-bg-light);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  border-radius: 0.25rem;
  width: var(--dropdown-width);
  padding: 0.5rem 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(1rem);
  transition: opacity var(--transition-med), transform var(--transition-med), visibility var(--transition-fast);
  z-index: 100;
}
.dropdown li a {
  display: block;
  padding: 0.5rem 1rem;
  font-weight: 400;
}
.dropdown li a:hover {
  background: var(--color-accent);
  color: var(--color-bg-light);
}

/* Show dropdown on hover */
@media (hover: hover) {
  .has-dropdown:hover .dropdown,
  .has-dropdown:focus-within .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .has-dropdown:hover > a::after {
    transform: rotate(-135deg);
  }
}

/* Hamburger & mobile nav */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 22px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1100;
}
.hamburger span {
  display: block;
  height: 4px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.hamburger.active span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}
.nav-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100vh;
  background: rgba(0,0,0,0.6);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
  z-index: 1050;
}

/* ==============================
   3) MOBILE STYLES (≤992px)
   ============================== */
@media (max-width: 992px) {
  .hamburger {
    display: flex;
  }
  .nav-links {
    position: fixed;
    top: 0; right: -100%;
    width: clamp(250px, 75%, 300px);
    height: 100vh;
    flex-direction: column;
    align-items: flex-start;
    padding: 4rem 1.5rem;
    background: var(--color-bg-light);
    gap: var(--nav-gap);
    transition: right var(--transition-fast);
    box-shadow: -2px 0 8px rgba(0,0,0,0.1);
    overflow-y: auto;
    z-index: 1099;
  }
  .nav-links.open {
    right: 0;
  }
  .nav-overlay.active {
    opacity: 1;
    visibility: visible;
  }

  /* Accordion dropdown on mobile */
  .has-dropdown > a::after {
    display: none;
  }
  .has-dropdown .dropdown {
    position: static;
    transform: none;
    max-height: 0;
    overflow: hidden;
    padding-left: 1rem;
    transition: max-height var(--transition-fast);
  }
  .has-dropdown.open .dropdown {
    max-height: 500px;
  }
}

/* ==============================
   4) TAB CONTENT AREA
   ============================== */
.tabs {
  display: flex;
  gap: 1rem;
  border-bottom: 2px solid #e0e0e0;
  margin: 1.5rem 0;
}
.tabs button {
  background: none;
  border: none;
  padding: 0.5rem 1rem;
  font-size: 1rem;
  color: var(--color-primary);
  cursor: pointer;
  transition: color var(--transition-fast), border-bottom-color var(--transition-fast);
}
.tabs button:hover {
  color: var(--color-accent);
}
.tabs button.active {
  color: var(--color-primary);
  font-weight: bold;
  border-bottom: 3px solid var(--color-primary);
}
#content {
  padding: 1rem 0;
}
#content h2, #content h4 {
  margin-top: 1rem;
}
#content p, #content li {
  line-height: 1.6;
}
#content ul {
  margin-left: 1.5rem;
}

/* =========================================================
   NAV-CTA  —  prettier gradient buttons (desktop & mobile)
   ========================================================= */
.nav-cta{
  display:flex;                 /* line-up buttons */
  gap:1rem;
  align-items:center;
}

/* main “pill” style */
.nav-cta a.btn-gradient{
  --grad-from:#4facfe;          /* blue-cyan blend */
  --grad-to: #00d2ff;
  padding:.55rem 1.5rem;
  min-width:110px;
  font-weight:600;
  font-size:.95rem;
  color:#fff;
  background-image:linear-gradient(135deg,var(--grad-from),var(--grad-to));
  background-size:200% 200%;
  border-radius:2rem;           /* full pill */
  text-decoration:none;
  box-shadow:0 3px 8px rgba(0,0,0,.15);
  transition:
    background-position .4s ease,
    transform             .25s ease,
    box-shadow            .25s ease;
}

/* hover / focus = shift gradient & lift */
.nav-cta a.btn-gradient:hover,
.nav-cta a.btn-gradient:focus{
  background-position:100% 0;
  transform:translateY(-2px);
  box-shadow:0 6px 16px rgba(0,0,0,.20);
}

/* active (mouse-down) */
.nav-cta a.btn-gradient:active{
  transform:translateY(0);
  box-shadow:0 2px 4px rgba(0,0,0,.20);
}

/* ─────────── “light” variant  ───────────
*/
.nav-cta a.btn-gradient[style*="background:#fff"]{
  background-image:none;
  background:#fff;
  color:var(--color-primary);
  border:2px solid var(--color-primary);
}
.nav-cta a.btn-gradient[style*="background:#fff"]:hover,
.nav-cta a.btn-gradient[style*="background:#fff"]:focus{
  background:var(--color-primary);
  color:#fff;
}

/* stack the buttons on mobile */
@media (max-width:992px){
  .nav-cta{
    flex-direction:column;
    align-items:flex-start;
    gap:.75rem;
    margin-top:1.5rem;
  }
}

/* Responsive Tabs */
@media (max-width: 600px) {
  .tabs {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .tabs button {
    flex: 1 1 auto;
    text-align: center;
  }
}