:root {
    --primary: #e74c3c;
    --primary-dark: #c0392b;
    --secondary: #2c3e50;
    --accent: #f39c12;
    --gradient-primary: linear-gradient(135deg, #e74c3c 0%, #f39c12 100%);
    --gradient-dark: linear-gradient(135deg, #2c3e50 0%, #1a252f 100%);
    --text-dark: #1a1a2e;
    --gray-bg: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 20px 60px rgba(0, 0, 0, 0.15);
    --radius: 20px;
    --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --font-primary: 'Inter', sans-serif;
    --font-display: 'Playfair Display', serif;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-primary);
    color: var(--text-dark);
    background: var(--white);
    line-height: 1.7;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

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

.section-padding {
    padding: 100px 0;
}

.section-tag {
    display: inline-block;
    background: var(--gradient-primary);
    color: var(--white);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    padding: 6px 20px;
    border-radius: 50px;
    margin-bottom: 15px;
}

.section-title {
    font-family: var(--font-display);
    font-size: 2.8rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 15px;
}

.section-title span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-center {
    text-align: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 35px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: 0 8px 30px rgba(231, 76, 60, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(231, 76, 60, 0.45);
    color: var(--white);
}

/* HEADER */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 9999;
    padding: 15px 0;
    transition: var(--transition);
    background: transparent;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 2px 30px rgba(0, 0, 0, 0.08);
    padding: 10px 0;
}

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

.logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--white);
    transition: var(--transition);
}

.header.scrolled .logo a {
    color: var(--text-dark);
}

.logo a i {
    color: var(--primary);
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-menu a {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 5px 0;
    transition: var(--transition);
}

.header.scrolled .nav-menu a {
    color: var(--text-dark);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

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

.btn-donate-nav {
    background: var(--gradient-primary) !important;
    color: var(--white) !important;
    padding: 10px 25px !important;
    border-radius: 50px !important;
    font-weight: 600 !important;
}

.btn-donate-nav::after {
    display: none !important;
}

.btn-donate-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(231, 76, 60, 0.4);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 100;
}

.hamburger span {
    width: 28px;
    height: 3px;
    background: var(--white);
    border-radius: 5px;
    transition: var(--transition);
}

.header.scrolled .hamburger span {
    background: var(--text-dark);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}

/* PAGE HERO */
.page-hero {
    padding: 150px 0 100px;
    position: relative;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    text-align: center;
    color: var(--white);
}

.page-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(44, 62, 80, 0.85) 0%, rgba(26, 37, 47, 0.75) 100%);
}

.page-hero-content {
    position: relative;
    z-index: 2;
}

.page-hero-content h1 {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 15px;
}

.page-hero-content p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.85);
}

/* ABOUT PAGE */
.about-page-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 60px;
}

.about-page-text p {
    color: #666;
    font-size: 1.05rem;
    line-height: 1.9;
    margin-bottom: 15px;
}

.about-page-image img {
    border-radius: var(--radius);
    width: 100%;
    height: 500px;
    object-fit: cover;
    box-shadow: var(--shadow);
}

.about-mission {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin: 60px 0;
}

.mission-item {
    text-align: center;
    padding: 40px 30px;
    background: var(--gray-bg);
    border-radius: var(--radius);
    transition: var(--transition);
}

.mission-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.mission-item i {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.mission-item h4 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.mission-item p {
    color: #666;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.team-card {
    text-align: center;
    padding: 30px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.team-card img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 15px;
}

.team-card h4 {
    font-size: 1.2rem;
    font-weight: 700;
}

.team-card span {
    color: #666;
    font-size: 0.95rem;
}

/* FOOTER */
.footer {
    background: var(--secondary);
    color: rgba(255, 255, 255, 0.8);
    padding: 80px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 50px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 15px;
}

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

.footer-about p {
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 15px;
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white);
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--gradient-primary);
    transform: translateY(-3px);
}

.footer h4 {
    color: var(--white);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links ul li a:hover {
    color: var(--primary);
    padding-left: 5px;
}

.footer-newsletter p {
    margin-bottom: 15px;
}

.newsletter-form {
    display: flex;
    gap: 10px;
}

.newsletter-form input {
    flex: 1;
    padding: 12px 18px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-family: var(--font-primary);
    font-size: 0.95rem;
}

.newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--primary);
}

.newsletter-form button {
    padding: 12px 20px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 10px;
    color: var(--white);
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.1rem;
}

.newsletter-form button:hover {
    transform: scale(1.05);
}

.footer-bottom {
    text-align: center;
    padding: 20px 0;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 8px 25px rgba(231, 76, 60, 0.4);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(231, 76, 60, 0.5);
}

/* RESPONSIVE */
@media (max-width: 1024px) {
    .about-page-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .about-mission {
        grid-template-columns: 1fr 1fr;
    }
    .team-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 350px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        padding: 80px 30px 30px;
        gap: 20px;
        box-shadow: -10px 0 40px rgba(0, 0, 0, 0.1);
        transition: var(--transition);
    }
    .nav-menu.active {
        right: 0;
    }
    .nav-menu a {
        color: var(--text-dark) !important;
        font-size: 1.1rem;
    }
    .btn-donate-nav {
        margin-top: 10px;
    }
    .page-hero-content h1 {
        font-size: 2.8rem;
    }
    .section-title {
        font-size: 2rem;
    }
    .about-mission {
        grid-template-columns: 1fr;
    }
    .team-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .about-page-image img {
        height: 300px;
    }
}

@media (max-width: 480px) {
    .page-hero-content h1 {
        font-size: 2rem;
    }
    .section-title {
        font-size: 1.8rem;
    }
    .btn {
        padding: 12px 25px;
        font-size: 0.9rem;
    }
}