/*
 * Instituto AlphaPró - Blog Home Style
 * Design System Compliant
 * Fontes: EB Garamond (títulos) | Inter (corpo)
 * Cores: #1a365b (Azul) | #b38d67 (Dourado)
 */

/* ========================================
   VARIÁVEIS CSS - DESIGN SYSTEM
======================================== */
:root {
    /* Cores de Fundo */
    --color-bg: #F9F7F2;
    --color-white: #FFFFFF;

    /* Cores da Marca */
    --color-primary: #1a365b;
    --color-accent: #b38d67;

    /* Cores de Texto */
    --color-text: #2C2C2C;
    --color-text-light: #666;

    /* Tipografia */
    --font-serif: 'EB Garamond', serif;
    --font-sans: 'Inter', sans-serif;

    /* Gradientes - Design System */
    --gradient-premium: linear-gradient(135deg, #1a365b 0%, #2c5282 100%);
    --gradient-gold: linear-gradient(135deg, #b38d67 0%, #d4a574 100%);

    /* Sombras - Design System */
    --shadow-soft: 0 4px 6px -1px rgba(26, 54, 91, 0.1);
    --shadow-medium: 0 10px 15px -3px rgba(26, 54, 91, 0.1);
    --shadow-large: 0 20px 25px -5px rgba(26, 54, 91, 0.1);

    /* Border Radius */
    --border-radius: 8px;
    --border-radius-lg: 12px;

    /* Transitions */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   RESET & BASE
======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul { list-style: none; }

/* ========================================
   LAYOUT CONTAINER
======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========================================
   BUTTONS - DESIGN SYSTEM
======================================== */
.btn {
    display: inline-block;
    padding: 12px 30px;
    font-size: 0.85rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-weight: 600;
    border: 2px solid var(--color-primary);
    cursor: pointer;
    transition: var(--transition-smooth);
    border-radius: var(--border-radius);
}

.btn-primary {
    background: var(--gradient-premium);
    color: var(--color-white);
    border-color: transparent;
}

.btn-primary:hover {
    background: var(--gradient-gold);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

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

.btn-outline:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-soft);
}

/* ========================================
   TAGS
======================================== */
.tag {
    font-size: 0.7rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 10px;
    display: block;
}

/* ========================================
   HEADER - GLASSMORPHISM
======================================== */
header {
    padding: 20px 0;
    position: sticky;
    top: 0;
    background-color: rgba(249, 247, 242, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(26, 54, 91, 0.1);
    box-shadow: var(--shadow-soft);
}

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

.logo {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--color-accent);
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
    color: var(--color-primary);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: var(--gradient-gold);
    transition: var(--transition-smooth);
}

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

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

/* ========================================
   HERO SECTION - PREMIUM
======================================== */
.hero {
    height: 85vh;
    display: flex;
    align-items: center;
    position: relative;
    margin-bottom: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    background-image: url('https://images.unsplash.com/photo-1498837167922-ddd27525d352?ixlib=rb-4.0.3&auto=format&fit=crop&w=1400&q=80');
    background-size: cover;
    background-position: center;
    z-index: 1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(26, 54, 91, 0.3), rgba(179, 141, 103, 0.2));
    z-index: 2;
}

.hero-content {
    width: 50%;
    background: var(--color-bg);
    padding: 60px 60px 60px 0;
    z-index: 3;
    position: relative;
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 4rem;
    line-height: 1.1;
    color: var(--color-primary);
    margin-bottom: 25px;
    font-weight: 700;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: 35px;
    max-width: 450px;
    line-height: 1.8;
}

/* ========================================
   FEATURED SECTION - ENHANCED
======================================== */
.featured-section {
    margin-bottom: 100px;
}

.featured-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background-color: var(--color-white);
    box-shadow: var(--shadow-large);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: var(--transition-smooth);
}

.featured-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 35px -5px rgba(26, 54, 91, 0.15);
}

.featured-img {
    height: 100%;
    min-height: 400px;
    background-image: url('https://images.unsplash.com/photo-1544005313-94ddf0286df2?ixlib=rb-4.0.3&auto=format&fit=crop&w=800&q=80');
    background-size: cover;
    background-position: center;
    position: relative;
}

.featured-img::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(26, 54, 91, 0.1), transparent);
}

.featured-text {
    padding: 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.featured-text h2 {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: 20px;
    font-weight: 700;
}

.featured-text p {
    color: var(--color-text-light);
    margin-bottom: 30px;
    line-height: 1.8;
}

/* ========================================
   ARTICLE GRID - MODERN CARDS
======================================== */
.grid-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    text-align: center;
    margin-bottom: 50px;
    color: var(--color-primary);
    font-weight: 700;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 100px;
}

.article-card {
    background: var(--color-white);
    transition: var(--transition-smooth);
    border: 1px solid rgba(0,0,0,0.03);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.article-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: var(--shadow-large);
}

.card-img {
    height: 250px;
    width: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.article-card:hover .card-img {
    transform: scale(1.05);
}

.card-body {
    padding: 30px;
}

.card-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    margin-bottom: 15px;
    line-height: 1.3;
    color: var(--color-primary);
    font-weight: 600;
}

.card-excerpt {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 20px;
    line-height: 1.7;
}

.read-more {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    color: var(--color-primary);
    border-bottom: 2px solid var(--color-accent);
    padding-bottom: 2px;
    display: inline-block;
    transition: var(--transition-smooth);
}

.read-more:hover {
    color: var(--color-accent);
    padding-left: 5px;
}

/* ========================================
   NEWSLETTER CARD - PREMIUM
======================================== */
.newsletter-card {
    background: var(--gradient-premium);
    color: var(--color-white);
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-large);
    position: relative;
    overflow: hidden;
}

.newsletter-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(179, 141, 103, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.newsletter-card h3 {
    font-family: var(--font-serif);
    font-size: 2rem;
    margin-bottom: 15px;
    color: var(--color-accent);
    position: relative;
    z-index: 1;
    font-weight: 700;
}

.newsletter-card p {
    position: relative;
    z-index: 1;
}

.input-group {
    margin-top: 20px;
    display: flex;
    gap: 10px;
    position: relative;
    z-index: 1;
}

.input-field {
    flex: 1;
    padding: 12px;
    border: none;
    background: rgba(255,255,255,0.15);
    color: #fff;
    outline: none;
    border-radius: var(--border-radius);
    backdrop-filter: blur(5px);
    transition: var(--transition-smooth);
}

.input-field::placeholder {
    color: rgba(255,255,255,0.6);
}

.input-field:focus {
    background: rgba(255,255,255,0.25);
    box-shadow: 0 0 0 2px rgba(179, 141, 103, 0.3);
}

.newsletter-card .btn {
    background: var(--color-white);
    color: var(--color-primary);
    border: none;
    width: 100%;
    position: relative;
    z-index: 1;
    font-weight: 600;
}

.newsletter-card .btn:hover {
    background: var(--color-accent);
    color: var(--color-white);
    transform: translateY(-2px);
}

/* ========================================
   FOOTER
======================================== */
footer {
    background-color: var(--color-white);
    padding: 60px 0;
    border-top: 1px solid #eee;
    text-align: center;
    box-shadow: 0 -4px 6px -1px rgba(26, 54, 91, 0.05);
}

.footer-text {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-top: 20px;
}

footer .footer-logo {
    font-size: 1.5rem;
}

footer .footer-social {
    margin-top: 20px;
}

footer .footer-link {
    margin: 0 10px;
    font-size: 1.2rem;
    color: var(--color-primary);
    transition: var(--transition-smooth);
}

footer .footer-link:hover {
    color: var(--color-accent);
}

/* ========================================
   RESPONSIVE - MOBILE FIRST
======================================== */
@media (max-width: 768px) {
    .hero {
        flex-direction: column-reverse;
        height: auto;
        padding-top: 40px;
    }

    .hero-bg {
        position: relative;
        width: 100%;
        height: 300px;
    }

    .hero-content {
        width: 100%;
        padding: 40px 20px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .featured-card {
        grid-template-columns: 1fr;
    }

    .featured-img {
        min-height: 250px;
    }

    .featured-text {
        padding: 30px;
    }

    .nav-links {
        display: none;
    }

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .grid-title {
        font-size: 1.5rem;
    }

    .newsletter-card {
        padding: 30px 20px;
    }

    .input-group {
        flex-direction: column;
    }
}