/* KEYSTONE ARCHAEOLOGY - MOBILE FIRST RESPONSIVE CSS */

/* ===== CSS VARIABLES - MOBILE FIRST ===== */
:root {
    --color1: #d4edda;
    --color2: #44e6c2;
    --color3: #ff5722;
    --color4: #2e7d32;
    --color5: #d0d0d0;
    --navbar-height: 80px;
    --text-color: #333;
    --bg-color: #ffffff;
    --transition: all 300ms ease;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

/* ===== GLOBAL STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    padding-top: var(--navbar-height);
    font-family: 'Roboto', sans-serif;
    color: var(--text-color);
    background-color: var(--color5);
    line-height: 1.6;
    overflow-x: hidden;
}

main {
    padding: var(--spacing-lg) var(--spacing-md);
}

/* ===== HEADER & NAVIGATION ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: var(--color1);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    z-index: 1000;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    padding: 0 var(--spacing-md);
}

.logo {
    height: 100%;
    display: flex;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-color);
    text-decoration: none;
    font-weight: bold;
}

/* Hamburger Menu - MOBILE FIRST */
.nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    padding: var(--spacing-sm);
    cursor: pointer;
    min-height: 44px;
    min-width: 44px;
    border-radius: 4px;
    transition: var(--transition);
}

.nav-toggle:hover {
    background: rgba(0,0,0,0.05);
}

.hamburger {
    display: block;
    position: relative;
    width: 24px;
    height: 2px;
    background: var(--text-color);
    transition: var(--transition);
    margin: 0;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 24px;
    height: 2px;
    background: var(--text-color);
    transition: var(--transition);
}

.hamburger::before { top: -7px; }
.hamburger::after { top: 7px; }

/* Mobile Menu */
.nav-menu {
    position: fixed;
    top: var(--navbar-height);
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: 280px;
    background: var(--color1);
    border-left: 1px solid #ddd;
    padding: var(--spacing-md) 0;
    transform: translateX(100%);
    transition: transform 350ms cubic-bezier(0.4, 0, 0.2, 1);
    list-style: none;
    overflow-y: auto;
    box-shadow: -4px 0 12px rgba(0,0,0,0.15);
    z-index: 999;
}

.nav-menu.active {
    transform: translateX(0);
}

.nav-menu li {
    margin: 0;
    list-style: none;
}

.nav-menu a {
    display: flex;
    align-items: center;
    color: var(--text-color);
    text-decoration: none;
    padding: var(--spacing-md) var(--spacing-lg);
    transition: var(--transition);
    font-size: 1rem;
    min-height: 44px;
    font-weight: 500;
}

.nav-menu a:hover,
.nav-menu a:focus {
    background: rgba(46, 125, 50, 0.15);
    color: var(--color4);
}

/* Tablet: Show horizontal menu */
@media (min-width: 769px) {
    .nav-toggle {
        display: none;
    }

    .nav-menu {
        position: static;
        transform: none;
        width: auto;
        max-width: none;
        background: transparent;
        border: none;
        padding: 0;
        display: flex;
        gap: var(--spacing-lg);
        box-shadow: none;
        overflow: visible;
        flex-wrap: wrap;
    }

    .nav-menu li {
        display: flex;
        align-items: center;
    }

    .nav-menu a {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.95rem;
        min-height: auto;
        font-weight: 500;
    }

    .nav-menu a:hover {
        background: transparent;
        color: var(--color3);
        text-decoration: underline;
    }
}

/* ===== LOGO IMAGE - RESPONSIVE ===== */
#keystoneimg {
    display: block;
    width: auto;
    height: auto;
    max-width: 35vw;
    max-height: var(--navbar-height);
    object-fit: contain;
    object-position: left center;
}

@media (min-width: 481px) {
    #keystoneimg {
        max-width: 30vw;
    }
}

@media (min-width: 769px) {
    #keystoneimg {
        max-width: 200px;
    }
}

@media (min-width: 1025px) {
    #keystoneimg {
        max-width: 240px;
        max-height: 56px;
    }
}

/* ===== CAROUSEL - MOBILE FIRST ===== */
header.keystone {
    position: relative;
    width: 100%;
    height: 325px;
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

@media (min-width: 481px) {
    header.keystone {
        height: 445px;
    }
}

@media (min-width: 769px) {
    header.keystone {
        height: 575px;
    }
}

@media (min-width: 1025px) {
    header.keystone {
        height: 650px;
    }
}

.carousel {
    position: relative;
    width: 100%;
    height: 100%;
    margin: 0 auto;
    z-index: 1;
}

.carousel__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    border-radius: 12px;
}

.carousel__track-container {
    height: 100%;
    position: relative;
    overflow: visible;
}

.carousel__track {
    padding: 0;
    margin: 0;
    list-style: none;
    position: relative;
    height: 100%;
    transition: transform 1600ms cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel__slide {
    position: absolute;
    height: 100%;
    transition: opacity 800ms ease;
    opacity: 0.3;
}

.carousel__slide.current-slide {
    opacity: 1;
}

.carousel__slide.carousel__slide--adjacent {
    opacity: 0.6;
}

/* Touch-friendly carousel buttons */
.carousel__button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-md);
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.carousel__button img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    filter: drop-shadow(0 0 2px rgba(0,0,0,0.3));
}

.carousel__button--left {
    left: 0;
    background: linear-gradient(90deg, rgba(0, 0, 0, 0.35), transparent);
}

.carousel__button--right {
    right: 0;
    background: linear-gradient(270deg, rgba(0, 0, 0, 0.35), transparent);
}

.carousel__button:hover {
    background-color: rgba(0, 0, 0, 0.25);
}

.is-hidden {
    display: none;
}

/* ===== KEYSTONE BOX - MOBILE FIRST ===== */
.keystone-box {
    position: relative;
    background: var(--color4);
    width: 90%;
    max-width: 700px;
    margin: -50px auto 0;
    z-index: 50;
    padding: var(--spacing-md);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    color: white;
    text-align: center;
}

.keystone-box h1 {
    font-family: 'Agency FB', sans-serif;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
    line-height: 1.2;
}

.keystone-box h3 {
    font-size: 1rem;
    font-weight: 300;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.5px;
}

.keystone-box p {
    font-size: 0.9rem;
    line-height: 1.5;
}

@media (min-width: 481px) {
    .keystone-box {
        padding: var(--spacing-lg);
        margin: -60px auto 0;
    }
    
    .keystone-box h1 {
        font-size: 2rem;
    }
    
    .keystone-box h3 {
        font-size: 1.2rem;
    }
    
    .keystone-box p {
        font-size: 0.95rem;
    }
}

@media (min-width: 769px) {
    .keystone-box {
        width: 85%;
        margin: -70px auto 0;
    }
    
    .keystone-box h1 {
        font-size: 2.5rem;
    }
    
    .keystone-box h3 {
        font-size: 1.4rem;
    }
    
    .keystone-box p {
        font-size: 1rem;
    }
}

@media (min-width: 1025px) {
    .keystone-box {
        width: 80%;
        margin: -80px auto 0;
    }
    
    .keystone-box h1 {
        font-size: 2.8rem;
    }
}

/* ===== ABOUT SECTIONS ===== */
.about-sections {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    padding: var(--spacing-md);
    max-width: 95%;
    margin: 0 auto;
    width: 90%;
    box-sizing: border-box;
}

.about-block {
    background: var(--color4);
    border-radius: 12px;
    padding: 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    color: white;
    overflow: hidden;
}

.about-block img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 12px;
}

.about-content {
    padding: var(--spacing-sm);
}

.about-content h2 {
    font-family: 'Agency FB', sans-serif;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.about-content p {
    line-height: 1.5;
    font-weight: 500;
    font-size: 0.9rem;
}

.what-we-do-list {
    font-size: 0.85rem;
    padding-left: 2rem;
    list-style: disc;
}

.what-we-do-list li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
}

@media (min-width: 481px) {
    .about-content h2 {
        font-size: 1.4rem;
    }
    .about-content p {
        font-size: 1rem;
    }
}

@media (min-width: 769px) {
    .about-sections {
        flex-direction: row;
        justify-content: space-between;
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .about-block {
        flex: 1;
        padding: var(--spacing-md);
    }
}

/* ===== FOOTER ===== */
footer {
    background: var(--color5);
    color: var(--text-color);
    padding: var(--spacing-xl) var(--spacing-md);
    margin: var(--spacing-xl) auto;
    border-radius: 8px;
    max-width: 95%;
    width: 100%;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

footer h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    font-family: 'Agency FB', sans-serif;
    width: 100%;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    text-align: center;
}

.footer-email {
    font-size: 1rem;
    font-weight: 500;
    margin: 0;
}

.footer-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-cta p {
    margin: 0;
    font-weight: 500;
}

.footer-btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color4);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    min-height: 44px;
    min-width: 44px;
    text-align: center;
}

.footer-btn:hover {
    background: #1b5e20;
    box-shadow: 0 4px 8px rgba(46, 125, 50, 0.3);
}

footer p {
    margin: 0;
    font-weight: 500;
}

/* ===== UTILITY CLASSES ===== */
.nothing {
    /* Placeholder for future content */
}

.director-name {
    font-size: larger;
    font-weight: bold;
}

.form-title {
    margin-bottom: var(--spacing-lg);
    color: var(--text-color);
    font-size: 1.5rem;
}

.file-upload-hint {
    font-size: 0.85rem;
    margin-top: 0.25rem;
    opacity: 0.8;
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .header,
    .nav-toggle,
    .carousel__button {
        display: none;
    }
    
    body {
        padding-top: 0;
    }
}