:root {
    --bg-color: #FDFCFB;
    --text-color: #2c3e50;
    --primary-color: #3498db;
    --heading-font: 'Georgia', 'serif';
    --body-font: 'Helvetica Neue', 'Arial', 'sans-serif';
    --container-width: 960px;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--body-font);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3 {
    font-family: var(--heading-font);
    font-weight: normal;
}

h1 { font-size: 3rem; line-height: 1.2; margin-bottom: 1rem;}
h2 { font-size: 2rem; margin-top: 4rem; margin-bottom: 2rem; text-align: center;}
h3 { font-size: 1.5rem; margin-bottom: 0.5rem;}
p { margin-bottom: 1rem; }
a { color: var(--primary-color); text-decoration: none;}
a:hover { text-decoration: underline; }

/* --- Header & Navigation --- */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 20px;
}

.logo {
    font-family: var(--heading-font);
    font-size: 1.5rem;
    font-weight: bold;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: 2rem;
}

/* --- Buttons --- */
.button {
    background-color: var(--primary-color);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.button:hover {
    background-color: #2980b9;
    color: white;
    text-decoration: none;
}

/* --- Page Sections --- */
#hero {
    text-align: center;
    padding: 4rem 0;
}

.subtitle {
    font-size: 1.2rem;
    color: #7f8c8d;
    max-width: 600px;
    margin: 0 auto;
}

#philosophy {
    text-align: center;
    max-width: 700px;
    padding: 2rem 0;
    border-top: 1px solid #ecf0f1;
    border-bottom: 1px solid #ecf0f1;
}

/* --- Project Grid --- */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.project-card {
    background: #ffffff;
    border: 1px solid #ecf0f1;
    border-radius: 8px;
    padding: 1.5rem;
}

.project-card-image {
    height: 150px;
    border-radius: 4px;
    margin-bottom: 1rem;
}

/* --- Collaborate Section --- */
#collaborate {
    text-align: center;
    padding: 4rem 0;
}

/* --- Footer --- */
footer {
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
    border-top: 1px solid #ecf0f1;
    color: #95a5a6;
}