:root {
    --primary-color: #e53e3e;
    --primary-dark: #c53030;
    --secondary-color: #2b6cb0;
    --accent-color: #f6ad55;
    --background-color: #fff;
    --text-color: #2d3748;
    --gray-light: #f7fafc;
    --gray-medium: #e2e8f0;
    --success-color: #48bb78;
    --error-color: #f56565;
    --section-bg-1: #fff5f5;
    --section-bg-2: #ebf8ff;
    --footer-bg: #2d3748;
    --footer-text: #e2e8f0;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

/* Header Styles */
#header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.logo i {
    margin-right: 0.5rem;
    font-size: 2rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-links a.active {
    color: var(--primary-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 10px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text-color);
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Hero Section */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)),
                url('https://images.unsplash.com/photo-1615461066841-6116e61058f4?auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    padding: 0 1rem;
}

.hero-content {
    max-width: 800px;
    padding: 2rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.animated-text {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeInUp 1s ease 0.5s forwards;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin: 2rem 0;
}

.stat-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 1.5rem 2.5rem;
    border-radius: 15px;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
}

.counter {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--accent-color);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 30px;
    font-weight: bold;
    transition: all 0.3s ease;
    animation: fadeInUp 1s ease 1s forwards;
    opacity: 0;
    border: 2px solid transparent;
}

.cta-button:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(229, 62, 62, 0.4);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Register Section */
.register-section {
    padding: 6rem 1rem;
    background: var(--section-bg-2);
}

.register-section h2 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 3rem;
    font-size: 2.5rem;
    position: relative;
}

.register-section h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

.donor-form {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.donor-form:hover {
    transform: translateY(-5px);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--gray-medium);
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--gray-light);
}

.form-group label {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: var(--gray-light);
    padding: 0 0.5rem;
    color: #718096;
    transition: all 0.3s ease;
    pointer-events: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    background: white;
    box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.1);
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group select:focus + label,
.form-group select:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: 0;
    font-size: 0.8rem;
    color: var(--primary-color);
    background: white;
}

.form-group.checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group.checkbox input {
    width: auto;
}

.form-group.checkbox label {
    position: static;
    transform: none;
    background: none;
    padding: 0;
}

.submit-btn {
    width: 100%;
    padding: 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.submit-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.submit-btn:hover::before {
    width: 300px;
    height: 300px;
}

.submit-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(229, 62, 62, 0.4);
}

/* Find Donor Section */
.find-section {
    padding: 6rem 1rem;
    background: var(--section-bg-1);
}

.find-section h2 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 3rem;
    font-size: 2.5rem;
    position: relative;
}

.find-section h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

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

.search-filters {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--gray-light);
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.search-filters select,
.search-filters input {
    padding: 1rem;
    border: 2px solid var(--gray-medium);
    border-radius: 10px;
    font-size: 1rem;
    flex: 1;
    transition: all 0.3s ease;
}

.search-filters select:focus,
.search-filters input:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.1);
}

.donor-results {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    padding: 1rem;
}

.donor-card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid var(--gray-medium);
}

.donor-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.donor-card h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
    border-bottom: 2px solid var(--gray-medium);
    padding-bottom: 0.5rem;
}

.donor-info {
    display: grid;
    gap: 1rem;
}

.donor-info p {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
}

.donor-info strong {
    color: var(--secondary-color);
}

.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    background: var(--gray-light);
    border-radius: 15px;
    color: var(--text-color);
}

/* Success Message */
.success-message {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.success-content {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    text-align: center;
    animation: scaleIn 0.3s ease;
    max-width: 90%;
    width: 400px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.success-content i {
    font-size: 4rem;
    color: var(--success-color);
    margin-bottom: 1.5rem;
}

.success-content h3 {
    color: var(--success-color);
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.success-content p {
    color: var(--text-color);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.success-content button {
    padding: 0.8rem 2rem;
    background: var(--success-color);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.success-content button:hover {
    background: #3da066;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(72, 187, 120, 0.4);
}

/* About Section */
.about-section {
    padding: 6rem 1rem;
    background: var(--section-bg-1);
    position: relative;
    overflow: hidden;
}

.about-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: linear-gradient(135deg, rgba(229, 62, 62, 0.05) 0%, rgba(43, 108, 176, 0.05) 100%);
    pointer-events: none;
}

.about-section h2 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 4rem;
    font-size: 2.5rem;
    position: relative;
}

.about-section h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

.about-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
}

.mission {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transform: translateY(0);
    transition: transform 0.3s ease;
}

.mission:hover {
    transform: translateY(-10px);
}

.mission h3 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 1rem;
}

.mission h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

.mission p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color);
}

.quote {
    background: var(--primary-color);
    padding: 3rem;
    border-radius: 20px;
    color: white;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(229, 62, 62, 0.2);
}

.quote::before {
    content: '"';
    position: absolute;
    top: -20px;
    left: 20px;
    font-size: 150px;
    opacity: 0.1;
    font-family: Georgia, serif;
}

.quote blockquote {
    font-size: 1.5rem;
    line-height: 1.8;
    font-style: italic;
    margin: 0;
    position: relative;
    z-index: 1;
}

/* Footer Styles */
footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    padding: 4rem 1rem 0;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: linear-gradient(135deg, rgba(229, 62, 62, 0.05) 0%, rgba(43, 108, 176, 0.05) 100%);
    pointer-events: none;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4rem;
    position: relative;
}

.footer-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.footer-section h3 {
    color: white;
    font-size: 1.3rem;
    position: relative;
    padding-bottom: 1rem;
    margin-bottom: 1rem;
}

.footer-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--primary-color);
    border-radius: 2px;
}

.footer-section p {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--footer-text);
}

.footer-section i {
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-links a {
    color: var(--footer-text);
    font-size: 1.5rem;
    transition: all 0.3s ease;
}

.social-links a:hover {
    color: var(--primary-color);
    transform: translateY(-3px);
}

.emergency {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--primary-color);
    padding: 1rem;
    background: rgba(229, 62, 62, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.footer-bottom {
    margin-top: 4rem;
    padding: 2rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: var(--footer-text);
    font-size: 0.9rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: white;
        flex-direction: column;
        align-items: center;
        padding: 2rem;
        transition: left 0.3s ease;
    }

    .nav-links.active {
        left: 0;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .stats {
        flex-direction: column;
        gap: 1rem;
    }

    .search-filters {
        flex-direction: column;
    }

    .donor-card {
        margin: 0 1rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .footer-section h3::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .social-links {
        justify-content: center;
    }

    .emergency {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-content {
        padding: 1rem;
    }

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

    .animated-text {
        font-size: 1.2rem;
    }

    .register-section h2,
    .find-section h2 {
        font-size: 2rem;
    }

    .donor-form {
        padding: 1.5rem;
    }
}