:root {
    /* Colors */
    --color-secondary: #4A4A4A;
    --color-primary: #3A3A3A;
    --color-accent: #B08B99;
    --color-background: #F9F7F5;
    --color-dark-text: #5A5A5A;
    --color-light-text: #fff;

    /* Typography */
    --font-heading: "Playfair", serif;
    --font-body: "Inter", sans-serif;

    --font-size-sm: 14px;
    --heading-size-large: 72px;
    --heading-size-medium: 48px;
    --heading-size-small: 32px;
    --heading-size-xsmall: 28px;

    --font-weight-extralight: 200;
    --font-weight-light: 300;
    --font-weight-regular: 400;

    /* Spacing */
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 32px;
    --spacing-xl: 64px;
    --spacing-xxl: 120px;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;

    /* Transitions */
    --transition: all 0.3s ease;

    /* Max Width */
    --max-width: 1200px;
}

/** Heading & Text Styles */

h1 {
    font-family: var(--font-heading);
    font-size: var(--heading-size-large);
}

h2 {
    font-family: var(--font-heading);
    font-size: var(--heading-size-medium);
    text-align: center;
    text-transform: uppercase;
}

h4 {
    font-family: var(--font-heading);
    font-size: var(--heading-size-xsmall);
}

h5 {
    font-family: var(--font-body);
}

p {
    font-family: var(--font-body);
}


/** Section Styles */

#hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    background-image: linear-gradient(rgba(30, 30, 30, 0.55), rgba(30, 30, 30, 0.55)), url('/images/about/bam-hero-image.jpg');
    background-size: cover;
    background-position: center;
    padding-right: 10%;
    padding-left: 10%;
}

#hero h1, #hero p {
    color: #fff;
    text-shadow: 0 2px 16px rgba(0,0,0,0.7), 0 1px 2px rgba(0,0,0,0.15);
}

marquee {
    background-color: var(--color-secondary);
    color: var(--color-light-text);
}

#value, #value-title {
    background-color: var(--color-primary);
    color:var(--color-light-text);
}

#value div {
    border-right: 1px solid var(--color-background);
    text-align: center;
}

#marquee-container {
    height: 40px;
}

#marquee-container marquee {
    height: 100%;
    line-height: 40px;
}

#marquee-container marquee p {
    font-weight: var(--font-weight-light);
    letter-spacing: 5%;
}

#services-title, #portfolio-title, #process-title, #about-title, #contact-title, #value-title {
    padding-top: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
}

#services, #services-title {
    background-color: var(--color-background);
    color: var(--color-secondary);
}

#services {
    border-bottom: 1px solid var(--color-secondary);
}

#portfolio, #portfolio-title, #contact, #contact-title {
    background-color: var(--color-secondary);
    color: var(--color-light-text);
}

#about, #about-title {
    background-color: var(--color-primary);
    color: var(--color-light-text);
}

#process, #process-title {
    background-color: var(--color-background);
    color: var(--color-primary);
}


#process div h4 {
    text-align: center;
}

.process-svg-container {
    text-align: center;
}

.process-desc-text {
    text-align: justify;
    padding-left: 7%;
    padding-right: 7%;
}

#footer {
    background-color: var(--color-primary);
    color: var(--color-light-text);
    text-align: center;
    padding: var(--spacing-sm);
    font-weight: var(--font-weight-light);
    font-size: var(--font-size-sm);
    margin: auto;
    display: flex;
    justify-content: center;
}

/** Navigation Bar Styles */

.navbar {
    background-color: var(--color-primary);
    padding-right: 5%;
    padding-left: 5%;
}

.nav-item .nav-link {
    color: var(--color-light-text);
}

.navbar-nav li {
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 5%;
    font-optical-sizing: auto;
    font-style: normal;
    font-weight: var(--font-weight-light);
    margin-right: 48px;
    margin-left: 48px;
}

.nav-item .nav-link:hover {
    color: var(--color-secondary);
    transition: var(--transition);
}

#bottom-nav {
    background-color: var(--color-background);
    color: var(--color-primary);
    display: flex;
    justify-content: center;
    padding-right: 5%;
    padding-left: 5%;
    padding-top: 1%;
    padding-bottom: 1%;
}

#bottom-nav > div {
    margin: auto;
    flex: 1;
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 5%;
    font-optical-sizing: auto;
    font-style: normal;
    font-weight: var(--font-weight-light);
    text-align: center;
}

#bottom-nav > div a {
    color: var(--color-primary);
    text-decoration: none;
}

#bottom-nav ul {
    margin: 0;
    padding: 0;
}

#bottom-nav ul li {
    display: inline;
    margin-right: 10px;
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 5%;
    font-optical-sizing: auto;
    font-style: normal;
    font-weight: var(--font-weight-light);
    
}

#bottom-nav ul li a:hover {
    color: var(--color-secondary);
    text-decoration: none;
}

.back-top-top-icon {
    color: var(--color-primary);
}

.icon-container:hover .back-top-top-icon {
    color: var(--color-accent);
    transition: var(--transition);
}

.social-media-icon {
    color: var(--color-accent);
}

.social-media-icon:hover {
    color: var(--color-primary);
    transition: var(--transition);
}

/** Universal Container Styles */

.main-container {
    display: flex;
    flex-wrap: nowrap;
    padding-bottom: 5%;
    padding-left: 10%;
    padding-right: 10%;
}

.main-container > div {
    flex: 1;
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
}

.secondary-container {
    display: flex;
    flex-wrap: wrap;
    padding-left: 5%;
    padding-right: 5%;
    padding-bottom: 5%;

}

.secondary-container > div {
    flex: 1;
    margin: auto;
    margin-left: 5px;
    margin-right: 5px;
}

.grid-container {
    display: grid;
    grid-template-columns: auto auto;
    padding-left: 5%;
    padding-right: 5%;
    padding-bottom: 5%;
}

.grid-container > div {
    border: 1px solid var(--color-secondary);
    padding: 5px;
    border-radius: 10px; 
    margin: auto;
    margin-left: 5px;
    margin-right: 5px;
    margin-bottom: 5px;
}



/** Component Styles */

.primary-button-accent{
    background-color: var(--color-accent);
    border-radius: 30px;
    color: var(--color-light-text);
    padding: 10px 20px;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 5%;
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    font-optical-sizing: auto;
    font-style: normal;
    font-weight: var(--font-weight-light);
}

.primary-button-accent:hover {
    background-color: var(--color-secondary);
    color: var(--color-light-text);
    transition: var(--transition);
}

.primary-button-accent-secondary{
    background-color: var(--color-accent);
    border-radius: 10px;
    color: var(--color-dark-text);
    padding: 10px 20px;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 5%;
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    font-optical-sizing: auto;
    font-style: normal;
    font-weight: var(--font-weight-light);
}

.primary-button-accent-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-light-text);
    transition: var(--transition);
}

.submit-button-accent {
    background-color: var(--color-secondary);
    border-radius: 20px;
    color: var(--color-accent);
    width: 100%;
    padding: 10px 20px;
    border: 1px solid var(--color-accent);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 5%;
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    font-optical-sizing: auto;
    font-style: normal;
    font-weight: var(--font-weight-light);
    cursor: pointer;
}

.submit-button-accent:hover {
    background-color: var(--color-primary);
    color: var(--color-light-text);
    border: 1px solid var(--color-primary);
    transition: var(--transition);
}

.flip-card {
    background-color: var(--color-background);
    border-radius: 10px;
    perspective: 1000px;
    width: 100%;
    height: 300px;
}

.flip-card-inner {
    position: relative;
    border-radius: 10px;
    width: 100%;
    height: 300px;
    text-align: center;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

.flip-card.is-flipped .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-card-front, .flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.flip-card-front {
    background-color: var(--color-background);
    color: var(--color-secondary);
    border-radius: 10px;
    border: 1px solid var(--color-secondary);
    font-size: var(--heading-size-small);
    font-family: var(--font-heading);
}

.flip-card-back {
    background-color: var(--color-secondary);
    color: var(--color-light-text);
    transform: rotateY(180deg);
    border-radius: 10px;
    padding: 10%;
}

.title-background {
    background-color: var(--color-primary);
    color: var(--color-light-text);
    padding: var(--spacing-sm);
    margin: 0;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
}

.paragraph-background {
    background-color: var(--color-background);
    color: var(--color-secondary);
    padding: var(--spacing-sm);
    border-bottom-left-radius: 10px;
    border-bottom-right-radius: 10px;
}

form > input {
    width: 100%;
}

form > textarea {
    width: 100%;
}

/* ANIMATIONS */
@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 2. Apply the animation to the element */
.animate-on-scroll {
  animation-name: fade-in;
  animation-duration: 1ms; /* Duration is set to auto or 1ms as it's scroll-driven, not time-driven */
  animation-fill-mode: both; /* Ensures the styles from the first keyframe are applied before the animation starts */
  /* 3. Link the animation to the element's visibility in the viewport */
  animation-timeline: view();
  /* animation-range allows fine-tuning when the animation starts/ends, e.g., covering the whole viewport */
  animation-range: cover 0% cover 100%;
}

/** Mobile Responsive Styles */

@media (max-width: 768px) {
    :root {
        --heading-size-large: 48px;
        --heading-size-medium: 40px;
        --heading-size-small: 28px;
        --heading-size-xsmall: 24px;
        --spacing-lg: 16px;
        --spacing-xl: 32px;
        --spacing-xxl: 60px;
    }

    #lets-work-btn {
        display: none;
    }

    .navbar-toggler {
        display: block;
    }

    .navbar-collapse {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-primary);
        flex-direction: column;
        padding: var(--spacing-md);
        z-index: 1000;
    }

    .navbar-collapse:not(.show) {
        display: none !important;
    }

    .navbar-nav {
        flex-direction: column;
    }

    .navbar-nav li {
        margin-right: 0;
        margin-left: 0;
        margin-bottom: var(--spacing-md);
        font-size: 12px;
    }

    #hero {
        flex-direction: column;
        text-align: center;
        color: #fff;
        background-image: linear-gradient(rgba(30, 30, 30, 0.55), rgba(30, 30, 30, 0.55)), url('/images/about/bam-hero-image.jpg');
        background-size: cover;
        background-position: center;    
    }

    #hero h1, #hero p {
        color: #fff;
        text-shadow: 0 2px 16px rgba(0,0,0,0.7), 0 1px 2px rgba(0,0,0,0.15);
    }

    #hero h1 {
        text-align: center;
        font-size: 2.2rem;
    }

    .main-container {
        flex-wrap: wrap;
        padding-left: 5%;
        padding-right: 5%;
        padding-top: 3%;
        padding-bottom: 3%;
    }

    .main-container > div {
        flex: 1 1 100%;
        padding: var(--spacing-md);
    }

    .secondary-container > div {
        flex: 1 1 100%;
        margin-bottom: var(--spacing-lg);
    }

    #value div {
        border-right: none;
    }

    .grid-container {
        grid-template-columns: 1fr;
        padding-left: 5%;
        padding-right: 5%;
    }

    .secondary-container {
        flex-wrap: wrap;
        padding-left: 5%;
        padding-right: 5%;
    }

    .flip-card {
        height: 250px;
    }

    .flip-card-inner {
        height: 250px;
    }

    #bottom-nav {
        flex-direction: column;
    }

    #bottom-nav > div {
        margin-bottom: var(--spacing-md);
    }

    #process, #process-title, #contact, #contact-title, #services, #services-title, #about, #about-title {
        padding-left: 5%;
        padding-right: 5%;
    }
}

@media (max-width: 480px) {
    :root {
        --heading-size-large: 32px;
        --heading-size-medium: 28px;
        --heading-size-small: 20px;
        --heading-size-xsmall: 18px;
        --spacing-lg: 12px;
    }

    .navbar-nav li {
        margin-right: 12px;
        margin-left: 12px;
    }

    .primary-button-accent,
    .primary-button-accent-secondary {
        padding: 8px 16px;
        font-size: 12px;
    }

    .process-desc-text {
        padding-left: 3%;
        padding-right: 3%;
    }
}