/**
 * NewsChannel PMAINFO - Design System Business
 * Paleta "Corporate Classic" - Professional & Trustworthy
 */

:root {
    /* Culori principale - Corporate Navy */
    --color-primary: #0f2b4c;
    --color-primary-light: #1a3d5c;
    --color-primary-dark: #0a1f35;
    
    --color-secondary: #5c6b7f;
    --color-secondary-light: #8893a3;
    
    --color-accent: #c9a227;
    --color-accent-hover: #b89220;
    
    --color-success: #2e7d32;
    --color-warning: #ed6c02;
    --color-error: #d32f2f;
    
    /* Fundaluri */
    --color-bg: #f5f7fa;
    --color-surface: #ffffff;
    --color-surface-alt: #e8ecf1;
    
    /* Text */
    --color-text-primary: #1a1a2e;
    --color-text-secondary: #4a5568;
    --color-text-muted: #718096;
    --color-text-inverse: #ffffff;
    
    /* Border & Shadow */
    --color-border: #d1d5db;
    --color-border-focus: #0f2b4c;
    --shadow-sm: 0 1px 3px rgba(15, 43, 76, 0.08);
    --shadow-md: 0 4px 12px rgba(15, 43, 76, 0.12);
    --shadow-lg: 0 8px 32px rgba(15, 43, 76, 0.16);
    --shadow-xl: 0 20px 48px rgba(15, 43, 76, 0.20);
 
    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-pill: 9999px;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 0.25rem;
    --spacing-lg: 0.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Loader */
    --loader-size: 48px;
    --loader-stroke: 4px;
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg);
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

/* ============================================
   HEADER
   ============================================ */
.app-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-text-inverse);
    padding: var(--spacing-md) var(--spacing-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.app-header__brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.app-header__logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-inverse);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.app-header__logo:hover {
    color: var(--color-text-inverse);
    opacity: 0.9;
}

/* ============================================
   SEARCH BAR
   ============================================ */
.search-container {
    position: relative;
    max-width: 600px;
    margin: var(--spacing-lg) 0;
}

.search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    padding-left: 3rem;
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-pill);
    background: var(--color-surface);
    color: var(--color-text-primary);
    transition: all var(--transition-base);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(30, 58, 95, 0.1);
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

.search-icon {
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-secondary);
    pointer-events: none;
}

/* ============================================
   CATEGORY CHIPS
   ============================================ */
.category-filter {
    display: flex;
    gap: var(--spacing-sm);
    overflow-x: auto;
    padding: var(--spacing-md) 0;
    margin-bottom: var(--spacing-lg);
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.category-filter::-webkit-scrollbar {
    display: none;
}

.category-chip {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-secondary);
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-pill);
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-base);
    user-select: none;
}

.category-chip:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.category-chip--active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-md);
}

.category-chip--active:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: var(--color-text-inverse);
}

/* ============================================
   PUBLICATION CARDS GRID
   ============================================ */
.publications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.publication-card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-base);
    cursor: pointer;
    border: 1px solid var(--color-border);
}

.publication-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.publication-card__header {
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.publication-card__logo {
    width: 48px;
    height: 48px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    background: var(--color-surface-alt);
    padding: var(--spacing-xs);
}

.publication-card__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0;
    line-height: 1.3;
}

.publication-card__body {
    padding: var(--spacing-lg);
}

.publication-card__categories {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.category-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-primary);
    background: rgba(30, 58, 95, 0.08);
    border-radius: var(--radius-sm);
}

.publication-card__status {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-success);
}

.status-indicator--inactive {
    background: var(--color-text-muted);
}

/* ============================================
   LOADER - PULSE RINGS (Elegant)
   ============================================ */
.loader-overlay {
    position: fixed;
    inset: 0;
    background: rgba(248, 250, 252, 0.95);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loader-overlay--visible {
    opacity: 1;
    visibility: visible;
}

.loader-pulse {
    position: relative;
    width: var(--loader-size);
    height: var(--loader-size);
}

.loader-pulse__ring {
    position: absolute;
    inset: 0;
    border: var(--loader-stroke) solid var(--color-primary);
    border-radius: 50%;
    opacity: 0;
    animation: pulse-ring 1.5s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.loader-pulse__ring:nth-child(2) {
    animation-delay: 0.5s;
}

.loader-pulse__ring:nth-child(3) {
    animation-delay: 1s;
}

.loader-pulse__center {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.loader-pulse__dot {
    width: 12px;
    height: 12px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: pulse-dot 1.5s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse-ring {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

@keyframes pulse-dot {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(0.8);
        opacity: 0.7;
    }
}

/* Loader Modal (pentru fetch RSS) */
.loader-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9998;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loader-modal--visible {
    opacity: 1;
    visibility: visible;
}

.loader-modal__content {
    background: var(--color-surface);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    text-align: center;
    max-width: 400px;
    width: 90%;
}

.loader-modal__text {
    margin-top: var(--spacing-lg);
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}

.loader-modal__source {
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-primary);
}

/* ============================================
   SKELETON LOADING
   ============================================ */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-surface-alt) 0%,
        var(--color-border) 50%,
        var(--color-surface-alt) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.skeleton-card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-lg);
}

.skeleton-card__logo {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
}

.skeleton-card__title {
    height: 20px;
    width: 70%;
    margin-bottom: var(--spacing-sm);
}

.skeleton-card__line {
    height: 12px;
    width: 100%;
    margin-bottom: var(--spacing-xs);
}

/* ============================================
   ARTICLE LIST
   ============================================ */
.articles-container {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.article-card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.article-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.article-card__image {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    background: var(--color-surface-alt);
}

.article-card__body {
    padding: var(--spacing-lg);
}

.article-card__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0 0 var(--spacing-sm) 0;
    line-height: 1.4;
}

.article-card__title a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.article-card__title a:hover {
    color: var(--color-primary);
}

.article-card__meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.article-card__date {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.article-card__source {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(30, 58, 95, 0.08);
    border-radius: var(--radius-sm);
    color: var(--color-primary);
    font-weight: 500;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    font-family: var(--font-family);
    border: 2px solid transparent;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn--primary {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
}

.btn--primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: var(--color-text-inverse);
}

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

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

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

.btn--outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ============================================
   UTILITIES
   ============================================ */
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }

.bg-surface { background: var(--color-surface); }
.bg-surface-alt { background: var(--color-surface-alt); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-pill { border-radius: var(--radius-pill); }

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    :root {
        --font-size-base: 0.9375rem;
    }
    
    .publications-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: var(--spacing-md);
        padding: var(--spacing-md);
    }
    
    .app-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .category-filter {
        padding: var(--spacing-sm) 0;
    }
}

@media (max-width: 480px) {
    .publications-grid {
        grid-template-columns: 1fr;
    }
    
    .search-input {
        padding: var(--spacing-sm) var(--spacing-md);
        padding-left: 2.75rem;
    }
}

/* Skip Link - Accesibilitate */
.skip-link {
    position: absolute;
    top: -100px; /* Ascuns deasupra viewport-ului */
    left: 0;
    background: var(--color-primary);
    color: var(--color-text-inverse);
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 10001;
    transition: top 0.2s ease;
    text-decoration: none;
    font-weight: 600;
}

/* Apare când primește focus (tastatură) */
.skip-link:focus {
    top: 0; /* Coborât în viewport */
}

/* Alternativ: ascunde complet dacă nu vrei accesibilitate */
/* .skip-link { display: none !important; } */

/* Currency Card - extend design system */
:root {
    --currency-accent: #10b981; /* Emerald pentru valori pozitive */
    --currency-bg: rgba(16, 185, 129, 0.08);
}

.currency-value {
    color: var(--color-primary);
}

/* Optional: highlight EUR row */
.currency-item:first-child {
    background: var(--currency-bg);
    border-left: 3px solid var(--currency-accent);
}