/* Global Styles */
:root {
    --primary-color: #4CAF50; /* Green */
    --secondary-color: #ff9800; /* Orange */
    --dark-color: #333; /* Darker grey */
    --light-color: #f4f7f6; /* Lighter background */
    --warning-color: #e17055;
    --success-color: #4CAF50; /* Match primary */
    --danger-color: #F44336;
    --shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease-in-out;
    --border-radius: 8px;
}

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

html {
    scroll-behavior: smooth; /* For smooth internal links */
    font-size: 100%; /* Base font size for easier rem scaling */
}

body {
    font-family: 'Poppins', sans-serif;
    color: var(--dark-color);
    background-color: var(--light-color);
    overflow-x: hidden;
    line-height: 1.6;
}
/* Added: Prevent scroll when mobile menu is open */
body.no-scroll {
    overflow: hidden;
}

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

.heart {
    color: var(--danger-color);
    display: inline-block;
    animation: pulseHeart 1.5s infinite ease-in-out;
}

@keyframes pulseHeart {
    0% { transform: scale(1); }
    50% { transform: scale(1.15); }
    100% { transform: scale(1); }
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0.8rem 2rem;
    background-color: rgba(255, 255, 255, 0.98);
    font-family: 'Poppins', sans-serif;
    position: fixed;
    width: 100%;
    top: 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    z-index: 1000;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    transform: translateY(-100%);
    animation: slideDownNavbar 0.6s ease forwards 0.2s;
}

@keyframes slideDownNavbar {
    to { transform: translateY(0); }
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1300px;
}

.logo-placeholder .app-name {
    color: var(--primary-color);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.nav-item .nav-link {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
    transition: color 0.3s ease;
}

.nav-item .nav-link:hover {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
    transition: width 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

/* Hamburger menu */
.hamburger {
    display: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.bar {
    display: block;
    width: 28px;
    height: 3px;
    margin: 6px auto;
    background-color: var(--dark-color);
    border-radius: 2px;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
}

.hamburger.active .bar:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}
.hamburger.active .bar:nth-child(2) {
    opacity: 0;
    transform: scale(0);
}
.hamburger.active .bar:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}
@media (max-width: 768px) {
    .navbar {
        background-color: #111; /* Dark background for better contrast */
    }

    .nav-item .nav-link {
        color: #fff; /* Light text on dark background */
    }

    .bar {
        background-color: #fff; /* Make hamburger bars visible on dark bg */
    }
}


/* Hero Section - SWAPPED: Now has video background */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: white;
    padding: 0 2rem;
    overflow: hidden;
}

/* SWAPPED: Video background now in hero section */
.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.5));
    z-index: -1;
}

/* Added video background to hero */
.video-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    opacity: 0.4;
    filter: grayscale(0%);
}
.video-background video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-content {
    max-width: 850px;
    margin: 0 auto;
    opacity: 0;
    transition: opacity 1s ease;
    z-index: 1;
}
.hero-content.visible {
    opacity: 1;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: 1.2rem;
    font-weight: 700;
    text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.6);
    line-height: 1.2;
    display: inline-block;
}

.hero-char-animate {
    display: inline-block;
    opacity: 0;
    transform: translateY(20px) scale(0.8);
    animation: revealChar 0.6s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}
@keyframes revealChar {
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.hero-subtitle {
    font-size: clamp(1.1rem, 3vw, 1.6rem);
    margin-bottom: 2.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.6);
    font-weight: 400;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s ease forwards;
}

.search-container {
    width: 100%;
    max-width: 650px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s ease forwards;
}

.search-box {
    display: flex;
    background-color: rgba(255, 255, 255, 0.95);
    border-radius: 50px;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
    border: 1px solid transparent;
}

.search-box:hover,
.search-box:focus-within {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.25);
    border-color: var(--secondary-color);
}

#searchInput {
    flex: 1;
    padding: 1.1rem 1.8rem;
    border: none;
    outline: none;
    font-size: 1.05rem;
    background: transparent;
    color: var(--dark-color);
}

#searchBtn {
    padding: 0 2rem;
    border: none;
    background-color: var(--primary-color);
    color: white;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    font-weight: 600;
}

#searchBtn:hover {
    background-color: var(--secondary-color);
    transform: scale(1.05);
}

.scroll-down {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.8);
    font-size: 2rem;
    animation: bounceArrow 2.5s infinite ease-in-out;
    cursor: pointer;
    transition: color 0.3s ease;
}
.scroll-down:hover {
    color: white;
}

@keyframes bounceArrow {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
    40% { transform: translateY(-25px) translateX(-50%); }
    60% { transform: translateY(-12px) translateX(-50%); }
}

/* Section Common Styles */
section {
    padding: 6rem 2rem;
}
#hero-section { padding: 0 2rem; }

.section-header {
    text-align: center;
    margin-bottom: 4rem;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section-header.in-view {
    opacity: 1;
    transform: translateY(0);
}

.section-header h2 {
    font-size: clamp(2rem, 5vw, 2.8rem);
    margin-bottom: 1rem;
    color: var(--dark-color);
    font-weight: 700;
}

.underline {
    width: 100px;
    height: 5px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    margin: 0 auto;
    border-radius: 3px;
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.6s cubic-bezier(0.25, 0.8, 0.25, 1) 0.2s;
}
.section-header.in-view .underline {
    transform: scaleX(1);
}

/* Results Section */
.results-section {
    background-color: white;
}

.results-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2.5rem;
    max-width: 1300px;
    margin: 0 auto;
}

/* Loading and No Results Styles */
.search-loading, .no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    color: #777;
    border-radius: var(--border-radius);
    background-color: var(--light-color);
}
.search-loading p, .no-results p {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    font-weight: 500;
}
.no-results span {
    font-size: 0.95rem;
    color: #999;
}

.no-results i {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    color: #ccc;
}
.no-results.error i {
    color: var(--danger-color);
}
.no-results.error p {
    color: var(--danger-color);
}

/* Spinner Animation */
.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(0, 0, 0, 0.1);
    border-left-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1.5rem auto;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

.result-card {
    background-color: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease, opacity 0.5s ease, filter 0.3s ease;
    opacity: 0;
    transform: translateY(30px) scale(0.98);
    display: flex;
    flex-direction: column;
}

.result-card.in-view {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.result-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-hover);
}

.result-image {
    height: 220px;
    background-color: #e0e0e0;
    background-size: cover;
    background-position: center;
    transition: transform 0.4s ease;
}
.result-card:hover .result-image {
    transform: scale(1.05);
}
.result-image.placeholder {
    background-size: contain;
    background-repeat: no-repeat;
    background-color: #f0f0f0;
}

.result-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.result-title {
    font-size: 1.4rem;
    margin-bottom: 0.8rem;
    color: var(--dark-color);
    font-weight: 600;
}

.result-location, .result-people, .result-description, .result-landmark {
    display: flex;
    align-items: flex-start;
    margin-bottom: 0.8rem;
    color: #555;
    font-size: 0.95rem;
}

.result-location i, .result-people i, .result-description i, .result-landmark i {
    margin-right: 0.7rem;
    color: var(--secondary-color);
    margin-top: 3px;
    width: 15px;
    text-align: center;
}

.result-landmark {
    font-style: italic;
    color: #666;
}

.result-link {
    display: inline-block;
    padding: 0.7rem 1.2rem;
    background-color: var(--primary-color);
    color: white !important;
    border-radius: 5px;
    transition: var(--transition);
    margin-top: auto;
    align-self: flex-start;
    font-weight: 500;
    border: none;
    cursor: pointer;
}
.result-link i {
    margin-right: 0.5rem;
}

.result-link:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}
.result-link[disabled] {
    background-color: #ccc;
    cursor: not-allowed;
    pointer-events: none;
}

/* Upload Section - SWAPPED: Now has image background */
.upload-section {
    position: relative;
    padding: 6rem 2rem;
    color: white;
    overflow: hidden;
}

/* SWAPPED: Hero image background now in upload section */
.upload-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0, 0, 0, 0.65), rgba(0, 0, 0, 0.4)), 
                url('https://images.unsplash.com/photo-1504674900247-0877df9cc836?ixlib=rb-1.2.1&auto=format&fit=crop&w=1950&q=80') center/cover no-repeat;
    z-index: -1;
    animation: zoomEffect 25s infinite alternate ease-in-out;
}

@keyframes zoomEffect {
    0% { transform: scale(1); }
    100% { transform: scale(1.08); }
}

.upload-overlay {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
    background-color: rgba(45, 52, 54, 0.85);
    padding: 2.5rem 3rem;
    border-radius: var(--border-radius);
    backdrop-filter: blur(8px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.section-header h2 {
    color: white;
    font-size: 2rem;
    text-align: center;
    margin-bottom: 0.5rem;
}

.section-header .underline {
    width: 80px;
    height: 4px;
    background-color: var(--primary-color);
    margin: 0 auto 2rem auto;
    border-radius: 2px;
}

.upload-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.8rem;
}

.form-group {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    margin-bottom: 0.6rem;
    font-weight: 500;
    color: rgba(255, 255, 255);
    transition: color 0.3s ease;
}

.form-group label:hover {
    color: var(--primary-color);
    cursor: pointer;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 5px;
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    transition: var(--transition), border-color 0.3s ease, transform 0.3s ease;
    font-size: 1rem;
}

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

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    background-color: rgba(255, 255, 255, 0.15);
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(255, 152, 0, 0.3);
    transform: scale(1.01);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.image-upload-box {
    border: 2px dashed rgba(255, 255, 255, 0.4);
    border-radius: 5px;
    padding: 2.5rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background-color: rgba(255, 255, 255, 0.05);
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.image-upload-box:hover {
    border-color: var(--secondary-color);
    background-color: rgba(255, 255, 255, 0.1);
    transform: scale(1.02);
}

.image-upload-box i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}
.image-upload-box:hover i {
    color: var(--secondary-color);
    transform: scale(1.1) rotate(5deg);
}
.image-upload-box p {
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

.submit-btn {
    grid-column: 1 / -1;
    padding: 1.1rem;
    background: linear-gradient(to right, var(--primary-color), #3a9a40);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition), transform 0.2s ease, box-shadow 0.3s ease;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.submit-btn:hover:not(:disabled) {
    background: linear-gradient(to right, var(--secondary-color), #ffaf36);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}
.submit-btn:disabled {
    background: #999;
    cursor: not-allowed;
    opacity: 0.7;
}
.submit-btn.submitting {
    background: #777;
    cursor: wait;
}

/* Info Section */
.info-section {
    padding: 6rem 2rem;
    background-color: var(--light-color);
}
.section-header h2 {
    color: white;
    font-size: 2rem;
    text-align: center;
    margin-bottom: 0.5rem;
}

.section-header .underline {
    width: 80px;
    height: 4px;
    background-color: var(--primary-color);
    margin: 0 auto 2rem auto;
    border-radius: 2px;
}
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
    max-width: 1300px;
    margin: 0 auto 4rem;
}

.stat-card {
    background-color: white;
    padding: 2.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition), border-left 0.3s ease;
    opacity: 0;
    transform: translateY(30px);
    border-left: 5px solid transparent;
}

.stat-card.in-view {
    opacity: 1;
    transform: translateY(0);
}

.stat-card:hover {
    transform: translateY(-8px) scale(1.03);
    box-shadow: var(--shadow-hover);
    border-left-color: var(--primary-color);
}

.stat-icon {
    width: 85px;
    height: 85px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    color: white;
    transition: transform 0.4s ease;
}
.stat-card:hover .stat-icon {
    transform: scale(1.1) rotate(10deg);
}

.hunger-icon { background: linear-gradient(135deg, #f56a79, #f89a9a); }
.waste-icon { background: linear-gradient(135deg, #ff7e5f, #feb47b); }
.child-icon { background: linear-gradient(135deg, #00c6ff, #0072ff); }

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.8rem;
    color: var(--primary-color);
}

.stat-desc {
    color: #666;
    font-size: 1rem;
    line-height: 1.5;
}

.charts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 450px), 1fr));
    gap: 3rem;
    max-width: 1300px;
    margin: 0 auto 4rem;
}

.chart-wrapper {
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition), box-shadow 0.3s ease;
    height: 450px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.chart-wrapper canvas {
    max-width: 100%;
    max-height: 100%;
}

.chart-wrapper.in-view {
    opacity: 1;
    transform: translateY(0);
}
.chart-wrapper:hover {
    box-shadow: var(--shadow-hover);
}

/* References Section */
.references {
    max-width: 900px;
    margin: 2rem auto 0 auto;
    background-color: white;
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition);
}
.references.in-view {
    opacity: 1;
    transform: translateY(0);
}

.references h3 {
    margin-bottom: 1.5rem;
    color: var(--dark-color);
    font-size: 1.5rem;
    font-weight: 600;
}

.references ul {
    list-style-position: inside;
    padding-left: 0;
    color: #555;
}

.references li {
    margin-bottom: 0.8rem;
    line-height: 1.7;
}
.references li::marker {
    color: var(--primary-color);
    font-weight: bold;
}

/* Footer */
.footer {
    background-color: var(--dark-color);
    color: #ccc;
    padding: 4rem 2rem 0;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    max-width: 1300px;
    margin: 0 auto;
    padding-bottom: 3rem;
}

.footer-brand {
    text-align: left;
    padding: 0;
    font-family: 'Poppins', sans-serif;
}

.footer-brand .app-name {
    color: var(--primary-color);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.footer-brand .heart {
    color: var(--danger-color);
    margin: 0 0.2rem;
}

.footer-brand p {
    color: #aaa;
    margin-top: 0.5rem;
    font-size: 0.95rem;
    line-height: 1.5;
}

.footer-links h4, .footer-contact h4 {
    margin-bottom: 1.8rem;
    font-size: 1.3rem;
    color: white;
    font-weight: 600;
    position: relative;
    padding-bottom: 0.5rem;
}

.footer-links h4::after, .footer-contact h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 1rem;
}

.footer-links a {
    color: #bbb;
    transition: color 0.3s ease, padding-left 0.3s ease;
    position: relative;
}

.footer-links a::before {
    content: '\f0da';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    position: absolute;
    left: -15px;
    opacity: 0;
    transition: opacity 0.3s ease, left 0.3s ease;
    color: var(--secondary-color);
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}
.footer-links a:hover::before {
    opacity: 1;
    left: -5px;
}

.footer-contact p {
    margin-bottom: 1.2rem;
    color: #bbb;
    display: flex;
    align-items: center;
    line-height: 1.7;
}

.footer-contact i {
    margin-right: 1rem;
    color: var(--secondary-color);
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

.social-icons {
    display: flex;
    gap: 1.2rem;
    margin-top: 1.5rem;
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.15);
    color: white;
    font-size: 1.2rem;
    transition: background-color 0.3s ease, transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.social-icons a:hover {
    background-color: var(--primary-color);
    transform: translateY(-5px) scale(1.1) rotate(-10deg);
    color: white;
}

.footer-bottom {
    text-align: center;
    padding: 1.8rem 0;
    margin-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    color: #aaa;
    font-size: 0.9rem;
}

/* Modal Styles */
.modal {
    display: none; /* Initially hidden */
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.75); /* Darker overlay */
    z-index: 2000;
    justify-content: center;
    align-items: center;
    padding: 1rem; /* Padding for small screens */
    /* Animations handled by classes like fade-in, slide-in */
}

.modal-content {
    background-color: white;
    padding: 2.5rem; /* More padding */
    border-radius: var(--border-radius);
    max-width: 550px; /* Wider modal */
    width: 95%;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
     /* Default animation state (can be overridden by specific modal animation) */
     opacity: 0;
     transform: scale(0.95);
}
/* Animations applied via JS adding classes */
.modal.fade-in .modal-content { animation: modalFadeZoomIn 0.4s cubic-bezier(0.165, 0.84, 0.44, 1) forwards; }
.modal.fade-out .modal-content { animation: modalFadeZoomOut 0.3s ease forwards; }
.modal.slide-in .modal-content { animation: modalSlideDown 0.4s cubic-bezier(0.25, 0.8, 0.25, 1) forwards; }
.modal.slide-out .modal-content { animation: modalSlideUp 0.3s ease forwards; }


@keyframes modalFadeZoomIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}
@keyframes modalFadeZoomOut {
    from { opacity: 1; transform: scale(1); }
    to { opacity: 0; transform: scale(0.95); }
}
@keyframes modalSlideDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes modalSlideUp {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(-30px); }
}


.modal h3 {
    margin-bottom: 1.2rem;
    color: var(--dark-color);
    font-size: 1.6rem; /* Larger heading */
    font-weight: 600;
}

.modal p {
    margin-bottom: 1.8rem;
    color: #555;
    line-height: 1.7;
    font-size: 1rem;
}

.close, .close-image-warning {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.8rem; /* Larger close button */
    cursor: pointer;
    color: #aaa;
    transition: color 0.3s ease, transform 0.3s ease;
     width: 30px; /* Hit area */
     height: 30px;
     display: flex;
     align-items: center;
     justify-content: center;
}

.close:hover, .close-image-warning:hover {
    color: var(--danger-color); /* Red hover for close */
    transform: rotate(90deg) scale(1.1);
}

#understandBtn {
    padding: 0.9rem 1.8rem; /* Larger button */
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    font-weight: 500;
}

#understandBtn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* Scroll Up Button */
.scroll-up-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 55px; /* Larger */
    height: 55px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.4rem; /* Larger icon */
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    opacity: 0;
    transform: translateY(30px) scale(0.9); /* Start lower and smaller */
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275); /* Bounce transition */
    z-index: 999; /* Below navbar/modals */
}

.scroll-up-btn.show {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.scroll-up-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-5px) scale(1.1); /* Bounce higher on hover */
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.25);
}

/* Notifications */
.notification {
    position: fixed;
    top: 80px; /* Below navbar */
    right: 20px;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    background-color: white;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.18);
    z-index: 2500; /* Above most elements */
    transform: translateX(120%);
    transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    width: calc(100% - 40px); /* Responsive width */
    max-width: 380px; /* Max width */
    border-left: 5px solid; /* Colored border on left */
    overflow: hidden; /* Hide progress bar overflow */
}

.notification.show {
    transform: translateX(0);
}

.notification.success { border-left-color: var(--success-color); }
.notification.error { border-left-color: var(--danger-color); }

.notification-content {
    display: flex;
    align-items: center;
}

.notification-content i {
    font-size: 1.5rem; /* Larger icon */
    margin-right: 1rem;
}
.notification-content i.fa-check-circle { color: var(--success-color); }
.notification-content i.fa-exclamation-circle { color: var(--danger-color); }

.notification-content span {
    font-size: 0.95rem;
    color: var(--dark-color);
    line-height: 1.5;
}
/* Notification Progress Bar */
.notification-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 4px;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.1); /* Base bar */
}
.notification-progress::after {
    content: '';
    display: block;
    height: 100%;
    width: 100%; /* Will be animated */
    background-color: currentColor; /* Inherits color from icon */
    transform-origin: left;
    animation: progressBarShrink 4s linear forwards; /* JS should match duration */
}
.notification.success .notification-progress::after { background-color: var(--success-color); }
.notification.error .notification-progress::after { background-color: var(--danger-color); }

@keyframes progressBarShrink {
    from { transform: scaleX(1); }
    to { transform: scaleX(0); }
}


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

/* Existing Modal animations (fade-in/out, slide-in/out) are now replaced */
/* with more specific ones like modalFadeZoomIn etc. near .modal styles */


/* Result card image handling (no change needed from original) */
.result-image.no-image {
    display: none;
}
/* ... rest of image handling styles ... */


/* Responsive Styles */
@media (max-width: 992px) {
     /* Adjust grid gaps for tablets */
    .results-container, .stats-container, .charts-container {
        gap: 1.8rem;
    }
    .upload-form { gap: 1.5rem; }
    .footer-content { gap: 2rem; }

    /* Adjust padding */
     section { padding: 4rem 1.5rem; }
     .upload-overlay { padding: 2rem 1.5rem; }
     .footer { padding: 3rem 1.5rem 0; }
}


@media (max-width: 768px) {
    .navbar {
        background-color: #111; /* Dark background for better contrast */
    }

    .nav-item .nav-link {
        color: #fff; /* Ensure light text for visibility */
    }

    .bar {
        background-color: #fff; /* Make hamburger bars visible on dark bg */
    }

    .hamburger {
        display: block; /* Show hamburger */
    }

    .nav-menu {
        position: fixed;
        top: 0;
        left: -100%; /* Start off-screen to the left */
        width: 85%; /* Reasonable width for mobile */
        max-width: 320px;
        height: 100vh;
        flex-direction: column;
        background-color: #333; /* Dark background */
        padding-top: 80px; /* Space for logo/close button */
        text-align: left;
        transition: left 0.4s cubic-bezier(0.25, 0.8, 0.25, 1); /* Smooth slide */
        box-shadow: 5px 0 15px rgba(0, 0, 0, 0.2);
        z-index: 1100; /* Above navbar content */
        gap: 0;
    }

    .nav-menu.active {
        left: 0; /* Slide to visible position */
    }

    .nav-item {
        margin: 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-item:last-child {
        border-bottom: none;
    }

    .nav-item .nav-link {
        display: block;
        padding: 1.2rem 1.5rem;
        color: #fff; /* Ensure text is white for visibility */
        font-weight: 500;
        font-size: 1.1rem; /* Slightly larger for readability */
    }

    .nav-item .nav-link:hover {
        background-color: rgba(255, 255, 255, 0.1);
        color: var(--primary-color);
    }

    .nav-link::after {
        display: none; /* Hide underline on mobile menu */
    }
}
    /* Hero text sizes */
    .hero-title { font-size: clamp(2.2rem, 8vw, 3.5rem); }
    .hero-subtitle { font-size: clamp(1rem, 4vw, 1.3rem); }

    /* Form adjustments */
    .upload-form { grid-template-columns: 1fr; } /* Stack form fields */

    /* Chart adjustments */
    .charts-container { grid-template-columns: 1fr; gap: 2rem; }
    .chart-wrapper { height: 380px; padding: 1.5rem; } /* Adjust height */

    /* Section headers */
    .section-header h2 { font-size: clamp(1.8rem, 6vw, 2.4rem); }

    /* Footer adjustments */
    .footer-content { grid-template-columns: 1fr; text-align: center; } /* Stack footer columns */
    .footer-brand { text-align: center; margin-bottom: 2rem; }
    .footer-links h4, .footer-contact h4 { text-align: center; }
    .footer-links h4::after, .footer-contact h4::after { left: 50%; transform: translateX(-50%); } /* Center underline */
    .footer-links ul { text-align: center; padding-left: 0; }
    .footer-links a::before { display: none; } /* Hide hover arrow */
     .footer-links a:hover { padding-left: 0; }
    .footer-contact p { justify-content: center; }
    .social-icons { justify-content: center; }
    .footer-bottom { padding: 1.5rem 0; margin-top: 2rem; }

@media (max-width: 480px) {
    /* Further adjustments for small phones */
     html { font-size: 95%; } /* Slightly smaller base font */

     section { padding: 3rem 1rem; }
     .navbar-container { padding: 0.6rem 1rem; }
     .logo-placeholder .app-name { font-size: 1.4rem; }

     .hero { padding: 0 1rem; }
     .hero-title { margin-bottom: 1rem; }
     .hero-subtitle { margin-bottom: 2rem; }

     .search-box { border-radius: var(--border-radius); } /* Less rounded */
     #searchInput { padding: 1rem 1.2rem; font-size: 1rem; }
     #searchBtn { padding: 0 1.5rem; }

     .results-container { grid-template-columns: 1fr; gap: 1.5rem; } /* Stack result cards */
     .result-card { flex-direction: column; } /* Ensure column layout */
     .result-image { height: 180px; }
     .result-content { padding: 1.2rem; }
     .result-title { font-size: 1.25rem; }

     .upload-overlay { padding: 1.5rem; }
     .form-group input, .form-group textarea { padding: 0.9rem; }
     .submit-btn { padding: 1rem; font-size: 1rem; }

     .stats-container { grid-template-columns: 1fr; gap: 1.5rem; }
     .stat-card { padding: 2rem; }
     .stat-number { font-size: 2.2rem; }

     .chart-wrapper { height: 350px; padding: 1rem; }

     .modal-content { padding: 1.5rem; }
     .modal h3 { font-size: 1.4rem; }
     .modal p { font-size: 0.95rem; }

     .notification {
          right: 10px;
          width: calc(100% - 20px);
          padding: 0.8rem 1rem;
     }
     .notification-content i { font-size: 1.3rem; margin-right: 0.8rem; }
     .notification-content span { font-size: 0.9rem; }

     .scroll-up-btn { width: 50px; height: 50px; font-size: 1.2rem; right: 15px; bottom: 15px;}
}