:root {
    --bg-color: #050505;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-hover: rgba(255, 255, 255, 0.06);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.5);
    --danger: #ef4444;
    --glass-border: rgba(255, 255, 255, 0.08);
    --shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.8);
}

/* Reset y Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    height: 100%;
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Outfit', sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    overflow-x: hidden;
}

/* Contenedor Principal */
#app {
    max-width: 500px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Header Glassmorphism */
.glass-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(5, 5, 5, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1.2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1#logo {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #60a5fa 0%, #a855f7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

nav#nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

nav#nav-links a.active {
    color: var(--text-primary);
    background: var(--card-bg);
    box-shadow: inset 0 0 0 1px var(--glass-border);
}

/* Contenido */
#view-container {
    flex: 1;
    padding: 1rem;
}

/* Tarjetas de Post */
.post-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 1.2rem;
    margin-bottom: 1rem;
    backdrop-filter: blur(5px);
    transition: transform 0.2s ease, background 0.2s ease;
}

.post-card:hover {
    background: var(--card-hover);
}

.post-content {
    font-size: 1.05rem;
    margin-bottom: 1rem;
    white-space: pre-wrap;
    word-break: break-word;
}

.post-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--glass-border);
    padding-top: 0.8rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Botones */
.btn-icon {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: color 0.2s ease;
}

.btn-icon:hover {
    color: var(--accent);
}

.btn-icon.liked {
    color: var(--danger);
    animation: heartBeat 0.3s ease;
}

.btn-delete {
    opacity: 0.5;
}

.btn-delete:hover {
    color: var(--danger);
    opacity: 1;
}

/* Formulario */
.composer-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 1.5rem;
    margin-top: 1rem;
}

textarea#post-content {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1.2rem;
    resize: none;
    min-height: 150px;
    outline: none;
}

textarea#post-content::placeholder {
    color: var(--text-secondary);
    opacity: 0.5;
}

#btn-publish {
    width: 100%;
    background: var(--accent);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 16px;
    font-weight: 700;
    font-size: 1rem;
    margin-top: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--accent-glow);
}

#btn-publish:hover {
    transform: translateY(-2px);
    background: #2563eb;
}

#btn-publish:active {
    transform: translateY(0);
}

/* Animaciones */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-in {
    animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes heartBeat {
    0% { transform: scale(1); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}

/* Mobile adjustments */
@media (max-width: 480px) {
    .glass-header {
        padding: 1rem;
    }
    h1#logo {
        font-size: 1.2rem;
    }
}