/* ============================================
   MAIN — Layout, Grid, Responsive
   ============================================ */
 
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

a:hover {
    color: var(--text-link-hover);
}

/* ============================================
   SKELETON LOADER
   ============================================ */

.skeleton-loader {
    padding: 20px;
}

.skeleton-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    margin-bottom: 32px;
    background-color: var(--bg-header);
}

.skeleton-hero {
    max-width: 700px;
    margin: 0 auto;
    padding: 24px;
}

.skeleton-line {
    height: 16px;
    border-radius: 4px;
    background: var(--border-color, #e0e0e0);
    margin-bottom: 12px;
    animation: shimmer 1.5s infinite;
}

.skeleton-input {
    height: 44px;
    border-radius: 6px;
    background: var(--border-color, #e0e0e0);
    margin: 20px 0 12px;
    animation: shimmer 1.5s infinite;
}

.skeleton-button {
    height: 44px;
    border-radius: 6px;
    background: var(--border-color, #e0e0e0);
    animation: shimmer 1.5s infinite;
}

.w-20 { width: 20%; }
.w-30 { width: 30%; }
.w-40 { width: 40%; }
.w-60 { width: 60%; }
.w-80 { width: 80%; }

@keyframes shimmer {
    0% { opacity: 0.6; }
    50% { opacity: 1; }
    100% { opacity: 0.6; }
}

/* ============================================
   HEADER LAYOUT
   ============================================ */

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-lg);
    background-color: var(--bg-header);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.header-logo {
    height: 32px;
    width: auto;
}

.header-title h1 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    color: #ffffff;
}

.header-subtitle {
    font-size: var(--font-size-xs);
    color: #9db8cc;
}

.btn-donate {
    display: inline-block;
    padding: 3px 12px;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: var(--font-weight-medium);
    background-color: transparent;
    color: #64b5f6;
    text-decoration: none;
    vertical-align: middle;
    line-height: 1.4;
    border: 1px solid #64b5f6;
    align-self: flex-start;
    margin-top: 0;
}

.btn-donate:hover {
    background-color: rgba(100, 180, 255, 0.15);
    color: #ffffff;
    border-color: #ffffff;
}

/* ============================================
   HERO LAYOUT
   ============================================ */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    padding: var(--space-lg) var(--space-lg) var(--space-md);
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    align-items: start;
}

.hero-pitch h2 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    line-height: 1.3;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.hero-pitch p {
    font-size: var(--font-size-md);
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    max-width: 540px;
}

.hero-expand-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: none;
    border: none;
    color: var(--text-link);
    font-size: var(--font-size-sm);
    cursor: pointer;
    padding: var(--space-xs) 0;
}

.hero-expand-btn:hover {
    color: var(--text-link-hover);
}

.hero-expand-arrow {
    font-size: var(--font-size-xs);
}

.hero-about-content {
    margin-top: var(--space-md);
}

.hero-about-content p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    max-width: 540px;
}

.hero-action {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.hero-country-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
}

.hero-country-select {
    width: 100%;
}

/* ============================================
   METRICS LAYOUT
   ============================================ */

.metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    padding: 0 var(--space-lg) var(--space-lg);
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* ============================================
   FILTERS LAYOUT
   ============================================ */

.filters {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    padding: 0 var(--space-lg) var(--space-lg);
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.filter-dropdowns {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

/* ============================================
   PROVIDERS LAYOUT
   ============================================ */

.providers {
    padding: 0 var(--space-lg) var(--space-lg);
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.providers-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.providers-viewing {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.providers-load-more {
    width: 100%;
    margin-top: var(--space-md);
}

/* ============================================
   FOOTER LAYOUT
   ============================================ */

.footer {
    margin-top: auto;
    padding: var(--space-lg);
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
}

.footer p {
    margin-bottom: var(--space-xs);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        padding: var(--space-xl) var(--space-lg);
    }
}

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: var(--space-sm);
        padding: var(--space-sm) var(--space-md);
    }

    .header-right {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        padding: var(--space-lg) var(--space-md);
    }

    .hero-pitch h2 {
        font-size: var(--font-size-xl);
    }

    .metrics {
        padding: 0 var(--space-md) var(--space-md);
    }

    .filters {
        padding: 0 var(--space-md) var(--space-md);
    }

    .filter-dropdowns {
        flex-direction: column;
    }

    .providers {
        padding: 0 var(--space-md) var(--space-md);
    }
}

@media (max-width: 480px) {
    .metrics {
        grid-template-columns: 1fr;
    }
}