/* ===========================
   CSS Variables - Brand Colors
   =========================== */
:root {
    --vu-blue: #273bbf;
    --true-blue: #6c82f2;
    --cool-blue: #6c9bd1;
    --yellow: #e7f37a;
    --gold: #CBA151;
    --black: #000000;
    --white: #ffffff;
    --gray-light: #f5f5f5;
    --gray-medium: #e0e0e0;
    --gray-dark: #333333;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--gray-dark);
    background-color: var(--white);
}

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

.hidden {
    display: none;
}

/* ===========================
   Navigation
   =========================== */
.navbar {
    background-color: var(--vu-blue);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.nav-logo img {
    height: 50px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--yellow);
}

.btn-donate {
    background-color: var(--yellow);
    color: var(--vu-blue) !important;
    padding: 0.6rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
}

.btn-donate:hover {
    background-color: var(--gold);
    color: var(--white) !important;
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    background: linear-gradient(135deg, var(--vu-blue) 0%, var(--true-blue) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 100px 20px 60px;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1rem;
    letter-spacing: 2px;
}

.hero-tagline {
    font-size: 1.5rem;
    color: var(--white);
    margin-bottom: 2rem;
    font-weight: 300;
}

.btn-primary {
    display: inline-block;
    background-color: var(--yellow);
    color: var(--vu-blue);
    padding: 1rem 2.5rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    background-color: var(--gold);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* ===========================
   Mission Section
   =========================== */
.mission {
    padding: 100px 20px;
    background-color: var(--white);
}

.mission h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--vu-blue);
    margin-bottom: 2rem;
}

.mission-content {
    max-width: 900px;
    margin: 0 auto 4rem;
}

.mission-content p {
    font-size: 1.2rem;
    line-height: 1.8;
    text-align: center;
    color: var(--gray-dark);
}

.mission-pillars {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.pillar {
    text-align: center;
    padding: 2rem;
    background-color: var(--gray-light);
    border-radius: 15px;
    transition: all 0.3s ease;
}

.pillar:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(39, 59, 191, 0.1);
}

.pillar-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.pillar h3 {
    font-size: 1.5rem;
    color: var(--vu-blue);
    margin-bottom: 1rem;
}

.pillar p {
    color: var(--gray-dark);
    line-height: 1.6;
}

/* ===========================
   Image Section
   =========================== */
.image-section {
    padding: 80px 20px;
    background: linear-gradient(135deg, var(--cool-blue) 0%, var(--true-blue) 100%);
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.image-placeholder {
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    padding: 4rem 2rem;
    text-align: center;
    min-height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--vu-blue);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.image-caption {
    text-align: center;
    color: var(--white);
    font-size: 1.1rem;
    max-width: 800px;
    margin: 2rem auto 0;
    line-height: 1.8;
}

/* ===========================
   Contact Section
   =========================== */
.contact {
    padding: 100px 20px;
    background-color: var(--gray-light);
}

.contact h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--vu-blue);
    margin-bottom: 1rem;
}

.contact-intro {
    text-align: center;
    font-size: 1.2rem;
    color: var(--gray-dark);
    margin-bottom: 3rem;
}

.contact-form {
    max-width: 700px;
    margin: 0 auto 3rem;
    background-color: var(--white);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--vu-blue);
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid var(--gray-medium);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--true-blue);
}

.form-group textarea {
    resize: vertical;
}

.btn-submit {
    width: 100%;
    padding: 1rem;
    background-color: var(--vu-blue);
    color: var(--white);
    border: none;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-submit:hover {
    background-color: var(--true-blue);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(39, 59, 191, 0.3);
}

.contact-info {
    text-align: center;
    font-size: 1.1rem;
}

.contact-info a {
    color: var(--vu-blue);
    text-decoration: none;
    font-weight: 600;
}

.contact-info a:hover {
    color: var(--true-blue);
}

/* ===========================
   Footer
   =========================== */
.footer {
    background-color: var(--vu-blue);
    color: var(--white);
    padding: 3rem 20px 2rem;
    text-align: center;
}

.footer-logo {
    margin-bottom: 1.5rem;
}

.footer-logo img {
    height: 80px;
    width: auto;
}

.footer-text {
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 0.5rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.footer-ein {
    font-size: 0.9rem;
    color: var(--cool-blue);
    margin-top: 0.5rem;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .btn-donate {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-tagline {
        font-size: 1.2rem;
    }

    .mission h2,
    .contact h2 {
        font-size: 2rem;
    }

    .mission-content p {
        font-size: 1.1rem;
    }

    .mission-pillars {
        gap: 2rem;
    }

    .contact-form {
        padding: 2rem 1.5rem;
    }

    .nav-logo img {
        height: 40px;
    }
}

@media (max-width: 480px) {
    .nav-links a:not(.btn-donate) {
        display: none;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-tagline {
        font-size: 1rem;
    }

    .btn-primary {
        padding: 0.8rem 2rem;
        font-size: 1rem;
    }

    .mission-pillars {
        grid-template-columns: 1fr;
    }

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