/*Google Fonts*/
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700&family=Open+Sans:wght@400;600&display=swap');

/* VARIABLES CSS */
:root {
  --header-height: 3.5rem;

  /* Colors */
  --first-color: #0a2540; /* Navy Blue */
  --first-color-alt: #051626;
  --second-color: #ff9900; /* Vibrant Orange */
  --title-color: #0a2540;
  --text-color: #555555;
  --text-color-light: #888888;
  --white-color: #ffffff;
  --body-color: #f9f9f9;
  --container-color: #ffffff;

  /* Font and Typography */
  --body-font: 'Open Sans', sans-serif;
  --title-font: 'Montserrat', sans-serif;
  
  --h1-font-size: 2.25rem;
  --h2-font-size: 1.5rem;
  --h3-font-size: 1.25rem;
  --normal-font-size: 1rem;
  --small-font-size: 0.875rem;
  --smaller-font-size: 0.813rem;

  /* Font Weight */
  --font-medium: 600;
  --font-bold: 700;

  /* Margins */
  --mb-0-5: 0.5rem;
  --mb-0-75: 0.75rem;
  --mb-1: 1rem;
  --mb-1-5: 1.5rem;
  --mb-2: 2rem;
  --mb-2-5: 2.5rem;
  --mb-3: 3rem;

  /* z index */
  --z-tooltip: 10;
  --z-fixed: 100;
  --z-modal: 1000;
}

/* Responsive Typography */
@media screen and (min-width: 968px) {
  :root {
    --h1-font-size: 3.5rem;
    --h2-font-size: 2.25rem;
    --h3-font-size: 1.5rem;
    --normal-font-size: 1.125rem;
    --small-font-size: 0.938rem;
    --smaller-font-size: 0.875rem;
  }
}

/* BASE */
* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0 0 var(--header-height) 0;
  font-family: var(--body-font);
  font-size: var(--normal-font-size);
  background-color: var(--body-color);
  color: var(--text-color);
}

h1, h2, h3, h4 {
  color: var(--title-color);
  font-family: var(--title-font);
  font-weight: var(--font-bold);
}

ul {
  list-style: none;
}

a {
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
}

button {
    cursor: pointer;
    border: none;
    outline: none;
}

/* REUSABLE CSS CLASSES */
.section {
  padding: 4.5rem 0 2rem;
}

.section__title {
  font-size: var(--h2-font-size);
  margin-bottom: var(--mb-2);
  text-align: center;
}

.section__subtitle {
  display: block;
  font-size: var(--small-font-size);
  margin-bottom: var(--mb-1);
  text-align: center;
  color: var(--second-color);
  font-weight: var(--font-bold);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.section__title-center,
.section__subtitle-center {
  text-align: center;
}

/* LAYOUT */
.container {
  max-width: 968px;
  margin-left: var(--mb-1-5);
  margin-right: var(--mb-1-5);
}

.grid {
  display: grid;
  gap: 1.5rem;
}

/* HEADER & NAV */
.header {
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--z-fixed);
  background-color: var(--body-color);
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}

.header__container {
  height: var(--header-height);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  color: var(--first-color);
  font-weight: var(--font-bold);
  font-family: var(--title-font);
  font-size: 1.25rem;
}

.logo__highlight {
    color: var(--second-color);
}

.nav__toggle {
  color: var(--title-color);
  font-size: 1.25rem;
  cursor: pointer;
}

@media screen and (max-width: 767px) {
  .nav__menu {
    position: fixed;
    bottom: -100%;
    left: 0;
    width: 100%;
    background-color: var(--container-color);
    padding: 2rem 1.5rem 4rem;
    box-shadow: 0 -1px 4px rgba(0,0,0,0.15);
    border-radius: 1.5rem 1.5rem 0 0;
    transition: .3s;
  }
}

.nav__list {
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.nav__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: var(--small-font-size);
  color: var(--title-color);
  font-weight: var(--font-medium);
  transition: .3s;
}

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

.nav__close {
  position: absolute;
  right: 1.3rem;
  bottom: 0.5rem;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--first-color);
}

.show-menu {
  bottom: 0;
}

.active-link {
    color: var(--second-color);
}

/* HERO AREA */
.home__container {
    gap: 3rem;
    align-items: center;
}

.home__data {
    text-align: center;
}

.home__title {
    font-size: var(--h1-font-size);
    margin-bottom: var(--mb-1);
    line-height: 1.2;
}

.text-highlight {
    color: var(--second-color);
}

.home__description {
    margin-bottom: var(--mb-2);
    color: var(--text-color);
}

.button {
    display: inline-block;
    background-color: var(--second-color);
    color: var(--white-color);
    padding: 1rem 1.75rem;
    border-radius: .5rem;
    font-weight: var(--font-medium);
    transition: .3s;
    font-family: var(--title-font);
}

.button:hover {
    background-color: #e68a00; /* Darker orange */
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.button--flex {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
}

/* ABOUT */
.about__container {
    gap: 2.5rem;
}

.about__data {
    text-align: center;
}

.about__img-container {
    justify-self: center;
}

.about__description {
    text-align: left;
    margin-bottom: var(--mb-2-5);
}

.about__details {
    display: grid;
    gap: 1.5rem;
}

.about__detail-box {
    text-align: left;
    padding: 1rem;
    background-color: var(--container-color);
    border-radius: 0.5rem;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

.about__icon {
    font-size: 1.5rem;
    color: var(--second-color);
    margin-bottom: var(--mb-0-5);
}

.about__detail-title {
    font-size: var(--normal-font-size);
    margin-bottom: .25rem;
}

.about__detail-description {
    font-size: var(--small-font-size);
}

/* METHODOLOGY */
.methodology__container {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.methodology__card {
    background-color: var(--first-color);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    color: var(--white-color);
    transition: .3s;
}

.methodology__card:hover {
    transform: translateY(-5px);
}

.methodology__icon-box {
    display: inline-flex;
    padding: .75rem;
    background-color: rgba(255,255,255,0.1);
    border-radius: 50%;
    margin-bottom: var(--mb-1);
    font-size: 2rem;
    color: var(--second-color);
}

.methodology__title {
    color: var(--white-color);
    margin-bottom: var(--mb-1);
}

.methodology__description {
    font-size: var(--small-font-size);
    color: #e0e0e0;
}

/* COURSES */
.courses__container {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.course__card {
    background-color: var(--container-color);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
    position: relative;
    display: flex;
    flex-direction: column;
}

.course__card.popular {
    border: 2px solid var(--second-color);
    transform: scale(1.02);
}

.course__badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--second-color);
    color: var(--white-color);
    font-size: var(--smaller-font-size);
    padding: .25rem .75rem;
    border-radius: 1rem;
    font-weight: var(--font-bold);
}

.course__header {
    background-color: var(--first-color);
    padding: 1.5rem;
    color: var(--white-color);
    text-align: center;
}

.course__title {
    color: var(--white-color);
    font-size: var(--h3-font-size);
    margin-bottom: .25rem;
}

.course__level {
    font-size: var(--small-font-size);
    font-weight: var(--font-medium);
    opacity: 0.8;
}

.course__body {
    padding: 1.5rem;
    flex: 1;
}

.course__description {
    font-size: var(--small-font-size);
    margin-bottom: var(--mb-1-5);
    text-align: center;
}

.course__features {
    display: flex;
    flex-direction: column;
    gap: .75rem;
}

.course__features li {
    display: flex;
    align-items: center;
    gap: .5rem;
    font-size: var(--small-font-size);
}

.course__features i {
    color: var(--second-color);
}

.course__button {
    margin: 1.5rem;
    display: block;
    text-align: center;
}

/* CONTACT */
.contact__container {
    row-gap: 3rem;
}

.contact__info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact__data {
    display: grid;
    gap: 1.5rem;
    margin-top: var(--mb-1);
}

.contact__item {
    display: flex;
    align-items: flex-start;
    gap: .75rem;
}

.contact__icon {
    font-size: 1.5rem;
    color: var(--second-color);
    margin-top: .15rem;
}

.contact__item-title {
    font-size: var(--medium-font-size);
    font-weight: var(--font-medium);
}

.contact__item-subtitle {
     font-size: var(--small-font-size);
     color: var(--text-color-light);
}

.contact__form {
    display: grid;
    gap: 1.5rem;
}

.contact__inputs {
     display: grid;
     gap: 1.5rem;
}

.contact__content {
    background-color: var(--container-color);
    border-radius: .5rem;
    padding: .75rem 1rem .25rem;
    border: 1px solid rgba(0,0,0,0.1);
}

.contact__label {
    font-size: var(--smaller-font-size);
    color: var(--title-color);
    font-weight: var(--font-bold);
}

.contact__input {
    width: 100%;
    background-color: var(--container-color);
    color: var(--text-color);
    font-family: var(--body-font);
    font-size: var(--normal-font-size);
    border: none;
    outline: none;
    padding: .25rem .5rem .5rem 0;
}

/* FOOTER */
.footer {
    background-color: var(--first-color);
    padding: 2rem 0;
    color: #fff;
}

.footer__container {
    row-gap: 3.5rem;
}

.footer__logo {
    color: var(--white-color);
    font-size: var(--h3-font-size);
    font-weight: var(--font-bold);
    font-family: var(--title-font);
}

.footer__description {
    font-size: var(--small-font-size);
    margin-top: var(--mb-0-75);
    color: #d1d1d1;
}

.footer__title {
    font-size: var(--h3-font-size);
    margin-bottom: var(--mb-1);
    color: var(--white-color);
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: .75rem;
}

.footer__link {
    color: #d1d1d1;
    transition: .3s;
}

.footer__link:hover {
    color: var(--second-color);
}

.footer__social {
    display: flex;
    gap: 1.25rem;
}

.footer__social-link {
    font-size: 1.25rem;
    color: #fff;
    transition: .3s;
}

.footer__social-link:hover {
    color: var(--second-color);
}

.footer__copy {
    text-align: center;
    font-size: var(--smaller-font-size);
    margin-top: 4rem;
    color: #a1a1a1;
}

/* SCROLL UP */
.scrollup {
    position: fixed;
    right: 1rem;
    bottom: -20%;
    background-color: var(--second-color);
    opacity: .8;
    padding: 0 .3rem;
    border-radius: .4rem;
    z-index: var(--z-tooltip);
    transition: .4s;
    color: #fff;
    display: inline-flex;
    padding: .5rem;
}

.scrollup:hover {
    background-color: var(--first-color);
}

.show-scroll {
    bottom: 5rem;
}


/* MEDIA QUERIES */

/* Small devices */
@media screen and (max-width: 350px) {
    .container {
        margin-left: 1rem;
        margin-right: 1rem;
    }
    
    .nav__list {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Medium devices / Tablets */
@media screen and (min-width: 568px) {
    .home__container,
    .about__container,
    .courses__container,
    .contact__data {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about__data, .home__data {
        text-align: initial;
    }
    
    .about__img-container {
        order: -1;
    }
}

@media screen and (min-width: 768px) {
    .container {
        margin-left: auto;
        margin-right: auto;
    }
    
    body {
        margin: 0;
    }
    
    .section {
        padding: 6rem 0 2rem;
    }
    
    .section__subtitle {
        margin-bottom: 3rem;
    }
    
    .header {
        top: 0;
        bottom: initial;
    }
    
    .header,
    .main,
    .footer__container {
        padding: 0 1rem;
    }
    
    .nav {
        height: calc(var(--header-height) + 1.5rem);
        display: flex;
        justify-content: space-between;
        align-items: center;
        column-gap: 1rem;
    }
    
    .nav__list {
        display: flex;
        column-gap: 2rem;
        background: transparent;
        padding: 0;
        box-shadow: none;
    }
    
    .nav__toggle, .nav__close {
        display: none;
    }
    
    .nav__link {
        flex-direction: row;
        color: var(--title-color);
    }

    .home__container {
        padding-top: 5rem;
        align-items: center;
        grid-template-columns: 1fr 1fr;
    }
    
    .about__container {
        column-gap: 5rem;
    }
    
    .footer__container {
        grid-template-columns: repeat(3, 1fr);
        justify-items: center;
    }
}

/* Large devices */
@media screen and (min-width: 1024px) {
    .header,
    .main,
    .footer__container {
        padding: 0;
    }

    .home__img-placeholder {
        height: 500px !important;
    }
}