/* Variables */
:root {
    --primary-color: #A0B9C0; /* Light blue-grey for subtle accents */
    --secondary-color: #7A9B80; /* Muted green for secondary accents */
    --text-color: #E0E0E0; /* Light grey for main text */
    --dark-bg: #1A1A1A; /* Dark background */
    --darker-bg: #0F0F0F; /* Even darker background for contrast */
    --light-grey: #B0B0B0;
    --border-color: #333;
    --font-family-sans: 'Montserrat', sans-serif;
    --font-family-serif: 'Playfair Display', serif;
    --transition-speed: 0.3s ease-in-out;
    --navbar-height: 80px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-sans);
    color: var(--text-color);
    background-color: var(--dark-bg);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

h1,
h2,
h3 {
    font-family: var(--font-family-serif);
    margin-bottom: 20px;
    color: var(--primary-color);
}

h1 {
    font-size: 3.5em;
    line-height: 1.1;
}

h2 {
    font-size: 2.5em;
    text-align: center;
    margin-bottom: 40px;
    position: relative;
    padding-bottom: 10px;
}

h2::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--secondary-color);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-speed);
}

a:hover {
    color: var(--light-grey);
}

.cta-button {
    display: inline-block;
    background-color: var(--secondary-color);
    color: var(--darker-bg);
    padding: 15px 30px;
    border-radius: 5px;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 1px;
    transition: background-color var(--transition-speed);
}

.cta-button:hover {
    background-color: var(--primary-color);
    color: var(--darker-bg);
}

/* Navigation Bar */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: transparent;
    padding: 20px 0;
    z-index: 1000;
    transition: background-color var(--transition-speed), backdrop-filter var(--transition-speed);
}

#navbar.scrolled {
    background-color: rgba(15, 15, 15, 0.9);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

#navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo {
    font-family: var(--font-family-serif);
    font-size: 1.8em;
    font-weight: bold;
    color: var(--primary-color);
}

#navbar ul {
    list-style: none;
    display: flex;
}

#navbar ul li {
    margin-left: 30px;
}

#navbar ul li a {
    color: var(--text-color);
    font-weight: 500;
    font-size: 1.1em;
    position: relative;
}

#navbar ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background-color: var(--secondary-color);
    left: 0;
    bottom: -5px;
    transition: width var(--transition-speed);
}

#navbar ul li a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero-section {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url("https://images.unsplash.com/photo-1490647898516-70e97d8e618e?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1920&q=80") no-repeat center center/cover;
    position: relative;
    color: white;
    overflow: hidden;
}

.hero-content {
    z-index: 1;
    max-width: 800px;
}

.hero-content h1 {
    font-size: 4.5em;
    margin-bottom: 20px;
    color: white;
    text-shadow: 0 5px 15px rgba(0,0,0,0.7);
}

.hero-content p {
    font-size: 1.5em;
    margin-bottom: 40px;
    color: var(--light-grey);
}

.hero-image-placeholder {
    display: none; /* Hidden since background image is used */
}

/* About Section */
.about-section {
    padding: 80px 0;
    background-color: var(--darker-bg);
    text-align: center;
}

.philosophy-statement {
    max-width: 800px;
    margin: 0 auto 60px auto;
    font-size: 1.2em;
    color: var(--light-grey);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.stat-item {
    background-color: var(--dark-bg);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
}

.stat-item i {
    font-size: 3em;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.stat-item .count {
    font-family: var(--font-family-serif);
    font-size: 2.5em;
    font-weight: bold;
    color: var(--primary-color);
    display: block;
    margin-bottom: 10px;
}

.stat-item p {
    font-size: 1.1em;
    color: var(--light-grey);
}

.professional-statement {
    max-width: 900px;
    margin: 0 auto;
    text-align: left;
    padding: 40px;
    background-color: var(--dark-bg);
    border-left: 5px solid var(--secondary-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    border-radius: 8px;
}

.professional-statement h3 {
    color: var(--primary-color);
    font-size: 2em;
    margin-bottom: 20px;
}

.professional-statement p {
    color: var(--light-grey);
    font-size: 1.1em;
}

/* Portfolio Section */
.portfolio-section {
    padding: 80px 0;
    background-color: var(--dark-bg);
}

.filter-buttons {
    text-align: center;
    margin-bottom: 40px;
}

.filter-btn {
    background-color: var(--darker-bg);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 10px 25px;
    margin: 0 10px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    font-weight: bold;
    transition: all var(--transition-speed);
}

.filter-btn:hover {
    background-color: var(--primary-color);
    color: var(--darker-bg);
}

.filter-btn.active {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    color: var(--darker-bg);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.portfolio-item {
    background-color: var(--darker-bg);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    height: 400px; /* Fixed height for consistent cards */
}

.portfolio-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
}

.portfolio-item .project-image-placeholder {
    width: 100%;
    height: 70%;
    background-color: #333;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2em;
    text-align: center;
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
}

.portfolio-item .project-image-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5); /* Dark overlay */
    transition: background 0.3s ease;
}

.portfolio-item:hover .project-image-placeholder::before {
    background: rgba(0, 0, 0, 0.3);
}

.portfolio-item .project-image-placeholder span {
    position: relative;
    z-index: 2;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.portfolio-item:hover .project-image-placeholder span {
    opacity: 1;
    transform: translateY(0);
}

.portfolio-item h3 {
    font-size: 1.5em;
    margin: 20px 0 10px;
    text-align: center;
    color: var(--primary-color);
}

.portfolio-item p {
    text-align: center;
    color: var(--light-grey);
    padding: 0 20px 20px;
}

/* Contact Section */
.contact-section {
    padding: 80px 0;
    background-color: var(--darker-bg);
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    padding: 40px;
    background-color: var(--dark-bg);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    border-top: 5px solid var(--secondary-color);
}

.form-group {
    position: relative;
    margin-bottom: 30px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    background-color: var(--darker-bg);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-color);
    font-size: 1em;
    outline: none;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(160, 185, 192, 0.5); /* Primary color with transparency */
}

.form-group label {
    position: absolute;
    top: 15px;
    left: 15px;
    color: var(--light-grey);
    pointer-events: none;
    transition: 0.3s ease all;
    font-size: 1em;
}

.form-group input:focus ~ label,
.form-group input:not(:placeholder-shown) ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:not(:placeholder-shown) ~ label {
    top: -10px;
    left: 10px;
    font-size: 0.8em;
    color: var(--secondary-color);
    background-color: var(--dark-bg);
    padding: 0 5px;
}

.submit-btn {
    display: block;
    width: 100%;
    background-color: var(--secondary-color);
    color: var(--darker-bg);
    padding: 15px 20px;
    border: none;
    border-radius: 5px;
    font-size: 1.1em;
    font-weight: bold;
    cursor: pointer;
    transition: background-color var(--transition-speed);
}

.submit-btn:hover {
    background-color: var(--primary-color);
}

.form-message {
    text-align: center;
    margin-top: 20px;
    font-size: 1.1em;
    font-weight: bold;
}

/* Footer */
footer {
    background-color: var(--darker-bg);
    color: var(--light-grey);
    text-align: center;
    padding: 30px 0;
    border-top: 1px solid var(--border-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 2.8em;
    }

    h2 {
        font-size: 2em;
    }

    #navbar .container {
        flex-direction: column;
    }

    #navbar ul {
        margin-top: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }

    #navbar ul li {
        margin: 0 15px 10px;
    }

    .hero-content p {
        font-size: 1.2em;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .professional-statement {
        padding: 30px;
    }

    .contact-form {
        padding: 30px;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2em;
    }

    .cta-button {
        padding: 12px 25px;
        font-size: 0.9em;
    }

    .filter-btn {
        padding: 8px 15px;
        margin: 0 5px 10px;
        font-size: 0.9em;
    }
}