/* ==========================================================================
   1. CSS Variables & Global Styles
   ========================================================================== */
:root {
    /* Color Palette (Monochrome with a strong accent) */
    --color-background: #FFFFFF;
    --color-background-dark: #0F0F0F;
    --color-background-light-gray: #F5F5F5;
    --color-text-primary: #222222;
    --color-text-secondary: #666666;
    --color-text-light: #FFFFFF;
    --color-accent: #FFD700; /* Gold/Yellow for "Oro Negro" */
    --color-border: #333333;

    /* Typography */
    --font-heading: 'Roboto', sans-serif;
    --font-body: 'Lato', sans-serif;

    /* Spacing & Layout */
    --container-width: 1200px;
    --spacing-unit: 1rem; /* 16px */
    --header-height: 80px;

    /* Transitions */
    --transition-fast: all 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-normal: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 100%;
}

body {
    font-family: var(--font-body);
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--color-text-primary);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 900;
    line-height: 1.2;
    color: var(--color-text-primary);
    text-transform: uppercase;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.2rem; }

p {
    margin-bottom: var(--spacing-unit);
    color: var(--color-text-secondary);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    filter: brightness(0.9);
}

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 1.5);
}

.section {
    padding: calc(var(--spacing-unit) * 5) 0;
}

.section__title {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 3);
    font-weight: 900;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

.section__subtitle {
    text-align: center;
    max-width: 800px;
    margin: -2rem auto 3rem auto;
    font-size: 1.2rem;
}

.section--dark {
    background-color: var(--color-background-dark);
    color: var(--color-text-light);
    position: relative;
}

.section--dark h2, .section--dark h3, .section--dark p {
    color: var(--color-text-light);
}

.section--light-gray {
    background-color: var(--color-background-light-gray);
}

/* ==========================================================================
   2. Header & Navigation
   ========================================================================== */
.header {
    width: 100%;
    height: var(--header-height);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    background-color: transparent;
    transition: background-color 0.4s ease;
}

.header.scrolled {
    background-color: rgba(15, 15, 15, 0.9);
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.header__logo {
    font-family: var(--font-heading);
    font-weight: 900;
    font-size: 1.5rem;
    color: var(--color-text-light);
    letter-spacing: 1px;
}

.header__nav-list {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
}

.header__nav-link {
    font-family: var(--font-heading);
    color: var(--color-text-light);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.9rem;
    position: relative;
    padding: 5px 0;
}

.header__nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-accent);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s cubic-bezier(0.19, 1, 0.22, 1);
}

.header__nav-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.header__nav-link--button {
    background-color: var(--color-accent);
    color: var(--color-background-dark);
    padding: 10px 20px;
    border: 2px solid var(--color-accent);
    transition: var(--transition-normal);
}

.header__nav-link--button:hover {
    background-color: transparent;
    color: var(--color-accent);
}

.header__burger-menu {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

/* ==========================================================================
   3. Hero Section
   ========================================================================== */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--color-text-light);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
}

.hero__container {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero__title {
    color: var(--color-text-light);
    font-size: 4.5rem;
    margin-bottom: var(--spacing-unit);
}

.hero__subtitle {
    color: var(--color-text-light);
    font-size: 1.4rem;
    max-width: 800px;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.hero__cta-button {
    background: var(--color-accent);
    color: var(--color-background-dark);
    font-family: var(--font-heading);
    font-weight: 900;
    text-transform: uppercase;
    padding: 18px 40px;
    border: 2px solid var(--color-accent);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    box-shadow: 5px 5px 0px var(--color-border);
}

.hero__cta-button:hover {
    background-color: var(--color-text-light);
    color: var(--color-background-dark);
    border-color: var(--color-text-light);
    transform: translate(2px, 2px);
    box-shadow: 3px 3px 0px var(--color-border);
}

/* ==========================================================================
   4. Card Component
   ========================================================================== */
.card {
    background-color: var(--color-background);
    border: 2px solid var(--color-border);
    display: flex;
    flex-direction: column;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 8px 8px 0px var(--color-accent);
}

.card-image {
    width: 100%;
    height: 250px; /* Fixed height for image container */
    overflow: hidden;
    border-bottom: 2px solid var(--color-border);
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* Ensures image covers the area without distortion */
    transition: transform 0.4s ease;
}

.card:hover .card-image img {
    transform: scale(1.05);
}

.card-content {
    padding: calc(var(--spacing-unit) * 2);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card__title {
    margin-bottom: var(--spacing-unit);
}

.card__text, .card__subtitle {
    margin-bottom: var(--spacing-unit);
    color: var(--color-text-secondary);
}

.card__link {
    margin-top: auto;
    font-weight: bold;
    text-transform: uppercase;
}

/* ==========================================================================
   5. Section-Specific Styles
   ========================================================================== */
/* Features Section */
.features__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
}

/* History Section */
.parallax-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    opacity: 0.1;
    z-index: 0;
}

.history__content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
    background-color: rgba(0, 0, 0, 0.4);
    padding: calc(var(--spacing-unit) * 2);
    border: 1px solid var(--color-accent);
}

/* Methodology Section (Accordion) */
.accordion {
    max-width: 900px;
    margin: 0 auto;
}

.accordion__item {
    border: 2px solid var(--color-border);
    margin-bottom: -2px; /* Overlap borders */
}

.accordion__header {
    background-color: var(--color-background);
    color: var(--color-text-primary);
    cursor: pointer;
    padding: calc(var(--spacing-unit) * 1.5);
    width: 100%;
    border: none;
    text-align: left;
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    transition: background-color 0.3s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.accordion__header:hover {
    background-color: var(--color-background-light-gray);
}

.accordion__icon {
    font-size: 1.5rem;
    font-weight: bold;
    transition: transform 0.3s ease;
}

.accordion__item.active .accordion__icon {
    transform: rotate(45deg);
}

.accordion__content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s cubic-bezier(0, 1, 0, 1);
    background-color: var(--color-background-light-gray);
}

.accordion__content p {
    padding: calc(var(--spacing-unit) * 1.5);
}

.accordion__item.active .accordion__content {
    max-height: 500px; /* Adjust as needed */
    transition: max-height 1s ease-in-out;
}

/* Instructors/Experts Section */
.instructors__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
}

.instructors__grid .card-image {
    border-radius: 50%;
    width: 180px;
    height: 180px;
    margin: 0 auto;
    border: 4px solid var(--color-border);
    margin-bottom: var(--spacing-unit);
}

/* Workshops Section */
.workshops__toggle {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: calc(var(--spacing-unit) * 2);
    gap: var(--spacing-unit);
}

.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input { display: none; }

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-border);
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
}

input:checked + .slider {
    background-color: var(--color-accent);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.workshops__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
}

.workshops__grid .card {
    background: var(--color-background-light-gray);
}

/* Clientele Section */
.clientele__grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: calc(var(--spacing-unit) * 4);
}

.client-logo img {
    max-height: 60px;
    filter: grayscale(100%) contrast(0);
    opacity: 0.7;
    transition: var(--transition-normal);
}

.client-logo img:hover {
    filter: grayscale(0) contrast(1);
    opacity: 1;
}

/* Testimonials Section */
.testimonials__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
    max-width: 1000px;
    margin: auto;
}

.testimonial-card {
    background-color: var(--color-background-light-gray);
    padding: calc(var(--spacing-unit) * 2);
    border-left: 5px solid var(--color-accent);
}

.testimonial-card__quote {
    font-style: italic;
    font-size: 1.2rem;
    margin-bottom: var(--spacing-unit);
}

.testimonial-card__author {
    font-weight: bold;
    text-align: right;
    color: var(--color-text-primary);
}

/* External Resources Section */
.resources__list {
    max-width: 900px;
    margin: auto;
}
.resource-item {
    padding: var(--spacing-unit) 0;
    border-bottom: 1px solid #ddd;
}
.resource-item:last-child {
    border-bottom: none;
}
.resource-item__title a {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    font-size: 1.2rem;
}
.resource-item__title a:hover {
    color: var(--color-accent);
}
.resource-item__description {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}


/* Contact Form */
.contact-form {
    max-width: 700px;
    margin: 0 auto;
    border: 2px solid var(--color-border);
    padding: calc(var(--spacing-unit) * 3);
    background-color: var(--color-background-light-gray);
}

.form-group {
    position: relative;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.form-input {
    width: 100%;
    padding: 15px;
    border: 2px solid var(--color-border);
    background-color: var(--color-background);
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-text-primary);
    transition: border-color 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent);
}

.form-label {
    position: absolute;
    top: 15px;
    left: 15px;
    color: var(--color-text-secondary);
    pointer-events: none;
    transition: all 0.2s ease;
}

.form-input:focus + .form-label,
.form-input:not(:placeholder-shown) + .form-label {
    top: -10px;
    left: 10px;
    font-size: 0.8rem;
    background-color: var(--color-background-light-gray);
    padding: 0 5px;
    color: var(--color-text-primary);
}

.form-button {
    width: 100%;
    padding: 18px;
    background: var(--color-accent);
    color: var(--color-background-dark);
    border: 2px solid var(--color-border);
    font-family: var(--font-heading);
    font-weight: 900;
    font-size: 1.1rem;
    text-transform: uppercase;
    cursor: pointer;
    transition: var(--transition-normal);
}

.form-button:hover {
    background-color: var(--color-border);
    color: var(--color-text-light);
}

/* ==========================================================================
   6. Footer
   ========================================================================== */
.footer {
    background-color: var(--color-background-dark);
    color: #a0a0a0;
    padding-top: calc(var(--spacing-unit) * 4);
}

.footer__container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
    padding-bottom: calc(var(--spacing-unit) * 3);
}

.footer__title {
    font-family: var(--font-heading);
    color: var(--color-text-light);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-unit);
    border-bottom: 2px solid var(--color-accent);
    padding-bottom: 8px;
    display: inline-block;
}

.footer__section ul li {
    margin-bottom: 10px;
}

.footer__section ul li a {
    color: #a0a0a0;
    transition: var(--transition-fast);
}

.footer__section ul li a:hover {
    color: var(--color-text-light);
    padding-left: 5px;
}

.footer__bottom {
    border-top: 1px solid #333;
    text-align: center;
    padding: calc(var(--spacing-unit) * 1.5) 0;
    font-size: 0.9rem;
}

/* ==========================================================================
   7. Static Pages & Utility
   ========================================================================== */
/* For success.html */
.success-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 100vh;
    background-color: var(--color-background-dark);
    color: var(--color-text-light);
    padding: var(--spacing-unit);
}
.success-page h1 {
    color: var(--color-accent);
    font-size: 4rem;
}
.success-page p {
    color: var(--color-text-light);
    font-size: 1.3rem;
}
.success-page .back-link {
    display: inline-block;
    margin-top: 2rem;
    padding: 10px 30px;
    background-color: var(--color-accent);
    color: var(--color-background-dark);
    font-weight: bold;
    text-transform: uppercase;
}

/* For privacy.html & terms.html */
.static-page-content {
    padding: calc(var(--header-height) + 50px) 0 50px 0;
}

.static-page-content h1, .static-page-content h2 {
    margin-bottom: 1.5rem;
    margin-top: 2rem;
}
.static-page-content h1 {
    text-align: center;
}


/* ==========================================================================
   8. Responsive Design
   ========================================================================== */
@media (max-width: 992px) {
    h1 { font-size: 2.8rem; }
    .hero__title { font-size: 3.5rem; }
}

@media (max-width: 768px) {
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.8rem; }
    .hero__title { font-size: 2.5rem; }
    .hero__subtitle { font-size: 1.1rem; }
    
    .header__nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background-color: var(--color-background-dark);
        display: flex;
        justify-content: center;
        align-items: center;
        transform: translateX(100%);
        transition: transform 0.5s cubic-bezier(0.86, 0, 0.07, 1);
    }
    .header__nav.active {
        transform: translateX(0);
    }

    .header__nav-list {
        flex-direction: column;
        gap: calc(var(--spacing-unit) * 3);
        text-align: center;
    }

    .header__nav-link {
        font-size: 1.5rem;
    }

    .header__burger-menu {
        display: flex;
        flex-direction: column;
        justify-content: space-around;
        width: 30px;
        height: 25px;
        padding: 0;
    }

    .header__burger-menu span {
        width: 30px;
        height: 3px;
        background-color: var(--color-text-light);
        transition: all 0.3s ease;
        position: relative;
    }
    
    .header.active .header__burger-menu span:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }
    .header.active .header__burger-menu span:nth-child(2) {
        opacity: 0;
    }
    .header.active .header__burger-menu span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
}

[data-aos^="fade"][data-aos^="fade"] {
  opacity: 1;
  transition-property: opacity,transform;
}

[data-aos="fade-up"] {
  transform: none;
}

[data-aos^="zoom"][data-aos^="zoom"] {
  opacity: 1;
  transition-property: opacity,transform;
}

[data-aos="fade-down"] {
  transform: none;
}

[data-aos="fade-right"] {
  transform: none;
}

[data-aos="fade-left"] {
  transform: none;
}