/* Variables para Dark Mode y reseteo */
:root {
    --bg-color: #0f172a; /* Fondo principal oscuro */
    --text-main: #f8fafc; /* Texto claro */
    --text-muted: #94a3b8; /* Texto secundario apagado */
    --primary-gradient: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
    --button-gradient: linear-gradient(135deg, #10b981 0%, #0ea5e9 100%);
    --card-bg: rgba(30, 41, 59, 0.7); /* Fondo de tarjeta semitransparente oscuro */
    --shadow-soft: 0 10px 25px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 15px 35px rgba(56, 189, 248, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
}

/* Tipografía y Gradientes */
.gradient-text {
    background: var(--button-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Navegación */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo {
    font-weight: 800;
    font-size: 1.5rem;
}

.wallet {
    display: flex;
    align-items: center;
    gap: 10px;
}

.wallet-badge {
    background: var(--primary-gradient);
    padding: 0.5rem 1.2rem;
    border-radius: 50px;
    font-weight: 600;
    color: #0f172a;
    box-shadow: var(--shadow-soft);
}

/* Contenedores */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 5%;
}

.hero {
    text-align: center;
    margin: 4rem 0;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

/* Botones Placenteros */
button {
    cursor: pointer;
    border: none;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    border-radius: 30px;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.btn-primary {
    background: var(--button-gradient);
    color: #f8fafc;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.btn-primary:active {
    transform: translateY(1px);
    box-shadow: 0 5px 10px rgba(16, 185, 129, 0.2);
}

.btn-secondary {
    background: transparent;
    color: var(--text-main);
    padding: 0.6rem 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
    box-shadow: var(--shadow-soft);
}

/* Tarjetas (Glassmorphism Oscuro) */
.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: var(--shadow-soft);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.2);
}

.card-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

.tag-request, .tag-offer {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-weight: 600;
}

/* Ajuste de etiquetas para que destaquen en fondo oscuro */
.tag-request { background: rgba(239, 68, 68, 0.2); color: #fca5a5; }
.tag-offer { background: rgba(99, 102, 241, 0.2); color: #a5b4fc; }

.escrow-badge {
    color: #34d399;
    font-weight: 600;
}

.card h3 { margin-bottom: 0.5rem; }
.card-user { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 1.5rem; }

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 1rem;
}