/* ======================================
   DonorsShield - Main Stylesheet
   ====================================== */

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #0B1F33;
    --color-accent: #1FA2A8;
    --color-background: #F5F7FA;
    --color-text: #222222;
    --color-text-light: #666666;
    --color-white: #FFFFFF;
    --color-border: #E1E8ED;
    --color-success: #28A745;
    --color-error: #DC3545;

    --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    --border-radius: 8px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-white);
    line-height: 1.6;
    font-size: 16px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
}

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

a:hover {
    color: #177d82;
}

.lead {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Navigation */
.navbar {
    background: var(--color-white);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

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

.nav-link-cta {
    background: var(--color-accent);
    color: var(--color-white);
}

.nav-link-cta:hover {
    background: #177d82;
    color: var(--color-white);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-primary);
    margin: 3px 0;
    transition: var(--transition);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-decoration: none;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background: #177d82;
    border-color: #177d82;
    color: var(--color-white);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-outline {
    background: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.btn-outline:hover {
    background: var(--color-accent);
    color: var(--color-white);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, #0f2d47 100%);
    color: var(--color-white);
    padding: var(--spacing-xxl) 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Sections */
.section {
    padding: var(--spacing-xxl) 0;
}

.section-light {
    background: var(--color-background);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-primary);
}

.section-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    font-size: 1.1rem;
    color: var(--color-text-light);
}

/* Page Header */
.page-header {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.page-header h1 {
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Cards */
.card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    transform: translateY(-4px);
}

.card-icon {
    font-size: 2.5rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

/* Features */
.feature {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.feature-icon {
    font-size: 2rem;
    color: var(--color-accent);
    min-width: 60px;
}

.feature-content h3 {
    color: var(--color-primary);
}

/* Ecosystem Diagram */
.ecosystem {
    max-width: 900px;
    margin: 0 auto;
}

.ecosystem-intro {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    font-size: 1.1rem;
}

.ecosystem-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.ecosystem-node {
    background: var(--color-white);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    text-align: center;
    min-width: 120px;
}

.ecosystem-node.highlight {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

.ecosystem-node i {
    font-size: 2rem;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.ecosystem-arrow {
    font-size: 1.5rem;
    color: var(--color-accent);
}

.ecosystem-points {
    margin-top: var(--spacing-xl);
}

.ecosystem-points .point {
    text-align: center;
}

.ecosystem-points i {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.ecosystem-points .fa-check-circle { color: var(--color-success); }
.ecosystem-points .fa-times-circle { color: var(--color-text-light); }

/* Impact Block */
.impact-block {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    max-width: 900px;
    margin: 0 auto;
}

.impact-icon {
    font-size: 4rem;
    color: var(--color-accent);
    min-width: 100px;
}

.impact-content h2 {
    color: var(--color-primary);
}

/* CTA Strip */
.cta-strip {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.cta-content h2 {
    margin-bottom: var(--spacing-md);
}

/* Content Blocks */
.content-block {
    max-width: 900px;
    margin: 0 auto;
}

.content-block ul {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.content-block li {
    margin-bottom: var(--spacing-xs);
}

/* Problem Blocks */
.problem-block {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.problem-icon {
    font-size: 2.5rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

/* Principles */
.principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.principle {
    text-align: center;
    padding: var(--spacing-lg);
}

.principle-icon {
    font-size: 3rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

/* Team */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.team-member {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.team-icon {
    font-size: 4rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.team-title {
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

/* Services */
.service-detail {
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.service-header {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.service-icon {
    font-size: 3rem;
    color: var(--color-accent);
    min-width: 60px;
}

.service-tagline {
    color: var(--color-accent);
    font-size: 1.1rem;
    margin-bottom: 0;
}

.service-body ul {
    margin-left: var(--spacing-lg);
}

.service-body li {
    margin-bottom: var(--spacing-sm);
}

/* Process */
.process-step {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: relative;
}

.process-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-accent);
    color: var(--color-white);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.process-icon {
    font-size: 2.5rem;
    color: var(--color-accent);
    margin: var(--spacing-md) 0;
}

/* Timeline */
.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding-left: var(--spacing-xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--color-accent);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-xl);
}

.timeline-marker {
    position: absolute;
    left: -42px;
    top: 0;
    width: 20px;
    height: 20px;
    background: var(--color-accent);
    border-radius: 50%;
    border: 4px solid var(--color-white);
}

.timeline-content {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.timeline-duration {
    color: var(--color-accent);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

/* Stakeholder Grid */
.stakeholder-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.stakeholder {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.stakeholder-icon {
    font-size: 3rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

/* Case Studies */
.case-study {
    background: var(--color-white);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
}

.case-study-header {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    align-items: flex-start;
}

.case-study-icon {
    font-size: 3rem;
    color: var(--color-accent);
    min-width: 60px;
}

.case-study-meta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.case-study-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.case-study-section {
    margin-bottom: var(--spacing-lg);
}

.case-study-section ul {
    margin-left: var(--spacing-lg);
}

.case-study-section li {
    margin-bottom: var(--spacing-xs);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.result-metric {
    background: var(--color-background);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
}

.metric-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent);
}

.metric-label {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* Resources */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.resource-card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    position: relative;
}

.resource-card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    transform: translateY(-4px);
}

.resource-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--color-accent);
    color: var(--color-white);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.resource-icon {
    font-size: 3rem;
    color: var(--color-accent);
    margin: var(--spacing-md) 0;
}

/* Events */
.event-list {
    max-width: 800px;
    margin: 0 auto;
}

.event-item {
    display: flex;
    gap: var(--spacing-md);
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.event-date {
    background: var(--color-accent);
    color: var(--color-white);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    text-align: center;
    min-width: 80px;
}

.event-month {
    font-size: 0.9rem;
    text-transform: uppercase;
}

.event-day {
    font-size: 2rem;
    font-weight: 700;
}

.event-details h3 {
    margin-bottom: var(--spacing-xs);
}

.event-details p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

/* FAQ */
.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-white);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.faq-question {
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--color-background);
}

.faq-question h3 {
    margin: 0;
    color: var(--color-primary);
}

.faq-question i {
    color: var(--color-accent);
    transition: var(--transition);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 var(--spacing-lg);
    max-height: 0;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.active .faq-answer {
    padding: var(--spacing-md) var(--spacing-lg);
    max-height: 500px;
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
}

.contact-form {
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--color-primary);
}

.required {
    color: var(--color-error);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: var(--transition);
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-info-block {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.contact-info-icon {
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.contact-info-block h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

/* Alerts */
.alert {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
}

.alert i {
    font-size: 2rem;
    min-width: 40px;
}

.alert h3 {
    margin-bottom: var(--spacing-xs);
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 2px solid #c3e6cb;
}

.alert-success i {
    color: var(--color-success);
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 2px solid #f5c6cb;
}

.alert-error i {
    color: var(--color-error);
}

.success-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* Footer */
.footer {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-col h3, .footer-col h4 {
    margin-bottom: var(--spacing-md);
}

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

.footer-col ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-col a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-col a:hover {
    color: var(--color-white);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

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

.social-links a:hover {
    background: var(--color-accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: var(--spacing-md);
    text-align: center;
    font-size: 0.9rem;
    opacity: 0.8;
}

.footer-bottom a {
    color: var(--color-white);
}

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

/* Responsive Design */
@media (max-width: 968px) {
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

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

    .ecosystem-diagram {
        flex-direction: column;
    }

    .ecosystem-arrow {
        transform: rotate(90deg);
    }

    .impact-block {
        flex-direction: column;
        text-align: center;
    }

    .timeline {
        padding-left: var(--spacing-md);
    }

    .timeline-marker {
        left: -27px;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.25rem; }

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

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--color-white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: var(--spacing-md) 0;
    }

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

    .nav-toggle {
        display: flex;
    }

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

    .hero-buttons {
        flex-direction: column;
    }
}