@import url("https://fonts.googleapis.com/css2?family=Montserrat+Alternates:wght@400;600;700&display=swap");

:root {
  /*========== Colors ==========*/
  /*Color mode HSL(hue, saturation, lightness)*/
  --first-color: rgb(255, 187, 0);
  --black-color: rgb(0, 0, 0);
  --white-color: hsl(0, 0%, 100%);
  --text-color: hsl(225, 8%, 65%);
  --body-color: hsl(225, 100%, 99%);

  /*========== Font and typography ==========*/
  /*.5rem = 8px | 1rem = 16px ...*/
  --body-font: "Montserrat Alternates", sans-serif;
  --biggest-font-size: 2.5rem;
  --tiny-font-size: .625rem;

  /*========== Font weight ==========*/
  --font-regular: 400;
  --font-semi-bold: 600;
  --font-bold: 700;

  /*========== z index ==========*/
  --z-tooltip: 10;
  --z-fixed: 100;
}

ul {
  list-style: none;
}

a {
  text-decoration: none;
}

.custom-nav {
  position: fixed;
  bottom: 0rem;
  left: 0;
  right: 0;
  background-color: var(--black-color);
  width: 100%;
  margin-inline: auto;
  box-shadow: 0 2px 16px hsla(228, 95%, 4%, .1);
  padding: .2rem 1.75rem;
  z-index: var(--z-fixed);
}

.nav__list {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__link {
  color: var(--text-color);
  font-size: 1.5rem;
  transition: color .4s;
}

.nav__link:hover {
  color: var(--white-color);
}

/*=============== EXPAND LIST ===============*/
.nav__expand {
  border: none;
  outline: none;
  width: 40px;
  height: 40px;
  background-color: var(--first-color);
  border-radius: 50%;
  cursor: pointer;
}

.nav__expand-icon {
  display: inline-block;
  color: var(--white-color);
  font-size: 1.5rem;
  transition: transform .4s;
}

.nav__expand-list {
  position: absolute;
  top: -4.5rem;
  left: 0;
  right: 0;
  background-color: var(--black-color);
  box-shadow: 0 2px 16px hsla(228, 95%, 4%, .1);
  width: max-content;
  margin-inline: auto;
  padding: .5rem 1.5rem;
  border-radius: 4rem;
  display: flex;
  column-gap: 2rem;
  z-index: -1;
  overflow: hidden;
  transform: translateY(5rem) scale(.1);
  transition: transform .5s cubic-bezier(.5, 1.8, .4, .8);
}

.nav__expand-list li {
  transform: translateY(-3rem);
  transition: transform .4s;
}

.nav__expand-list li:nth-child(1) {
  transition-delay: .2s;
}

.nav__expand-list li:nth-child(2) {
  transition-delay: .3s;
}

.nav__expand-list li:nth-child(3) {
  transition-delay: .4s;
}

.nav__expand-link {
  color: var(--text-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: color .4s;
}

.nav__expand-link i {
  font-size: 1.2rem;
}

.nav__expand-link span {
  font-size: var(--tiny-font-size);
  font-weight: var(--font-semi-bold);
}

.nav__expand-link:hover {
  color: var(--white-color);
}

/* Show list */
.show-list,
.show-list li {
  transform: translateY(0);
}

/* Rotate icon */
.rotate-icon {
  transform: rotate(135deg);
}

/* Active link */
.active-link {
  color: var(--first-color);
}

/*=============== BREAKPOINTS ===============*/
/* For medium devices */

.bg-gradient-custom {
  background: linear-gradient(90deg, #0D3F55 0%, #1B5F85 100%);
  position: relative;
}

.bg-gradient-custom::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, #0D3F55a0 0%, #1B5F85a0 100%);
  z-index: 0;
}

/*=============== CUSTOM GRADIENT BUTTONS ===============*/

/* Gradient Button: Primary (#D35400) */
.btn-gradient-primary {
  --bs-btn-color: #fff;
  --bs-btn-bg: #D35400;
  --bs-btn-border-color: #D35400;
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: #BA4A00;
  --bs-btn-hover-border-color: #BA4A00;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #BA4A00;
  --bs-btn-active-border-color: #BA4A00;
  background: linear-gradient(135deg, #BA4A00 0%, #D35400 100%);
  border: 1px solid #D35400;
  transition: all 0.3s ease;
}

.btn-gradient-primary:hover {
  background: linear-gradient(135deg, #D35400 0%, #E67E22 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(211, 84, 0, 0.4);
}

/* Gradient Button: Green (#1B5F85) */
.btn-gradient-green {
  --bs-btn-color: #fff;
  --bs-btn-bg: #1B5F85;
  --bs-btn-border-color: #1B5F85;
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: #0D3F55;
  --bs-btn-hover-border-color: #0D3F55;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #0D3F55;
  --bs-btn-active-border-color: #0D3F55;
  background: linear-gradient(135deg, #0D3F55 0%, #1B5F85 100%);
  border: 1px solid #1B5F85;
  transition: all 0.3s ease;
}

.btn-gradient-green:hover {
  background: linear-gradient(135deg, #1B5F85 0%, #2A8BC5 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(27, 95, 133, 0.4);
}

/*=============== OUTLINE GRADIENT BUTTONS ===============*/

/* Outline: Primary */
.btn-outline-gradient-primary {
  --bs-btn-color: #D35400;
  --bs-btn-bg: transparent;
  --bs-btn-border-color: #D35400;
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: #D35400;
  --bs-btn-hover-border-color: #D35400;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #BA4A00;
  --bs-btn-active-border-color: #BA4A00;
  border: 2px solid #D35400;
  transition: all 0.3s ease;
}

.btn-outline-gradient-primary:hover {
  background: linear-gradient(135deg, #BA4A00 0%, #D35400 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(211, 84, 0, 0.3);
}

/* Outline: Green */
.btn-outline-gradient-green {
  --bs-btn-color: #1B5F85;
  --bs-btn-bg: transparent;
  --bs-btn-border-color: #1B5F85;
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: #1B5F85;
  --bs-btn-hover-border-color: #1B5F85;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #0D3F55;
  --bs-btn-active-border-color: #0D3F55;
  border: 2px solid #1B5F85;
  transition: all 0.3s ease;
}

.btn-outline-gradient-green:hover {
  background: linear-gradient(135deg, #0D3F55 0%, #1B5F85 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(27, 95, 133, 0.3);
}